0.62.0

Test cases:

1. 'jump' should show alternating background colors even when 'alt-bg' is
not defined as before.

  go run main.go --bind load:jump

Two differences:
  * The alternating lines will not be in bold (was a bug)
  * The marker column will not be rendered with alternating background color

2. Use alternating background color when 'alt-bg' is set

  go run main.go --color bg:238,alt-bg:237
  go run main.go --color bg:238,alt-bg:237 --highlight-line

3. 'selected-bg' should take precedence

  go run main.go --color bg:238,alt-bg:237,selected-bg:232 \
                 --highlight-line --multi --bind 'load:select+up+select+up'

4. Should work with text with ANSI colors

  declare -f | perl -0777 -pe 's/^}\n/}\0/gm' |
    bat --plain --language bash --color always |
    go run main.go --read0 --ansi --reverse --multi \
                   --color bg:237,alt-bg:238,current-bg:236 --highlight-line

---

Close #4354
Fix #4372

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: junegunn

.github/ISSUE_TEMPLATE.md

@@ -1,30 +0,0 @@
-<!-- Check all that apply [x] -->
-- Category
-    - [ ] fzf binary
-    - [ ] fzf-tmux script
-    - [ ] Key bindings
-    - [ ] Completion
-    - [ ] Vim
-    - [ ] Neovim
-    - [ ] Etc.
-- OS
-    - [ ] Linux
-    - [ ] Mac OS X
-    - [ ] Windows
-    - [ ] Windows Subsystem for Linux
-    - [ ] Etc.
-- Shell
-    - [ ] bash
-    - [ ] zsh
-    - [ ] fish
-
-<!--
-### Before submitting
-
-- Make sure that you have the latest version of fzf
-- If you use tmux, make sure $TERM is set to screen or screen-256color
-- For more Vim stuff, check out https://github.com/junegunn/fzf.vim
-
-Describe your problem or suggestion from here ...
--->
-

.github/ISSUE_TEMPLATE/issue_template.yml

@@ -0,0 +1,49 @@
+---
+name: Issue Template
+description: Report a problem or bug related to fzf to help us improve
+
+body:
+  - type: markdown
+    attributes:
+      value: ISSUES NOT FOLLOWING THIS TEMPLATE WILL BE CLOSED AND DELETED
+
+  - type: checkboxes
+    attributes:
+      label: Checklist
+      options:
+        - label: I have read through the manual page (`man fzf`)
+          required: true
+        - label: I have searched through the existing issues
+          required: true
+        - label: For bug reports, I have checked if the bug is reproducible in the latest version of fzf
+          required: false
+
+  - type: input
+    attributes:
+      label: Output of `fzf --version`
+      placeholder: e.g. 0.48.1 (d579e33)
+    validations:
+      required: true
+
+  - type: checkboxes
+    attributes:
+      label: OS
+      options:
+        - label: Linux
+        - label: macOS
+        - label: Windows
+        - label: Etc.
+
+  - type: checkboxes
+    attributes:
+      label: Shell
+      options:
+        - label: bash
+        - label: zsh
+        - label: fish
+
+  - type: textarea
+    attributes:
+      label: Problem / Steps to reproduce
+    validations:
+      required: true

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+        interval: "weekly"

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,44 @@
+# https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning
+name: CodeQL
+
+on:
+  push:
+    branches: [ master, devel ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    permissions:
+      actions: read  # for github/codeql-action/init to get workflow details
+      contents: read  # for actions/checkout to fetch code
+      security-events: write  # for github/codeql-action/autobuild to send a status report
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ['go']
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: ${{ matrix.language }}
+
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v3
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3

.github/workflows/depsreview.yaml

@@ -0,0 +1,14 @@
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v4
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v4

.github/workflows/linux.yml

@@ -0,0 +1,48 @@
+---
+name: Test fzf on Linux
+
+on:
+  push:
+    branches: [ master, devel ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+env:
+  LANG: C.UTF-8
+
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: "1.20"
+
+    - name: Setup Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.4.1
+
+    - name: Install packages
+      run: sudo apt-get install --yes zsh fish tmux
+
+    - name: Install Ruby gems
+      run: bundle install
+
+    - name: Rubocop
+      run: make lint
+
+    - name: Unit test
+      run: make test
+
+    - name: Integration test
+      run: make install && ./install --all && tmux new-session -d && ruby test/runner.rb --verbose

.github/workflows/macos.yml

@@ -0,0 +1,45 @@
+---
+name: Test fzf on macOS
+
+on:
+  push:
+    branches: [ master, devel ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: "1.20"
+
+    - name: Setup Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.0.0
+
+    - name: Install packages
+      run: HOMEBREW_NO_INSTALL_CLEANUP=1 brew install fish zsh tmux
+
+    - name: Install Ruby gems
+      run: gem install --no-document minitest:5.14.2 rubocop:1.0.0 rubocop-minitest:0.10.1 rubocop-performance:1.8.1
+
+    - name: Rubocop
+      run: rubocop --require rubocop-minitest --require rubocop-performance
+
+    - name: Unit test
+      run: make test
+
+    - name: Integration test
+      run: make install && ./install --all && LC_ALL=C tmux new-session -d && ruby test/test_go.rb --verbose

.github/workflows/sponsors.yml

@@ -0,0 +1,24 @@
+---
+name: Generate Sponsors README
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: 0 0 * * 0
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/checkout@v4
+
+      - name: Generate Sponsors 💖
+        uses: JamesIves/github-sponsors-readme-action@v1
+        with:
+          token: ${{ secrets.SPONSORS_TOKEN }}
+          file: 'README.md'
+
+      - name: Deploy to GitHub Pages 🚀
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          branch: master
+          folder: '.'

.github/workflows/typos.yml

@@ -0,0 +1,10 @@
+name: "Spell Check"
+on: [pull_request]
+
+jobs:
+  typos:
+    name: Spell Check with Typos
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: crate-ci/typos@v1.29.4

.github/workflows/winget.yml

@@ -0,0 +1,14 @@
+name: Publish to Winget
+on:
+  release:
+    types: [released]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: vedantmgoyal2009/winget-releaser@v2
+        with:
+          identifier: junegunn.fzf
+          installers-regex: '-windows_(armv7|arm64|amd64)\.zip$'
+          token: ${{ secrets.WINGET_TOKEN }}

.gitignore

@@ -1,6 +1,14 @@
-bin
-src/fzf/fzf-*
-gopath
+bin/fzf
+bin/fzf.exe
+dist
+target
 pkg
-Gemfile.lock
 .DS_Store
+doc/tags
+vendor
+gopath
+*.zwc
+fzf
+tmp
+*.patch
+.idea

.goreleaser.yml

@@ -0,0 +1,104 @@
+---
+version: 2
+project_name: fzf
+
+before:
+  hooks:
+    - go mod download
+
+builds:
+  - id: fzf
+    goos:
+      - darwin
+      - linux
+      - windows
+      - freebsd
+      - openbsd
+    goarch:
+      - amd64
+      - arm
+      - arm64
+      - loong64
+      - ppc64le
+      - s390x
+    goarm:
+      - 5
+      - 6
+      - 7
+    flags:
+      - -trimpath
+    ldflags:
+      - "-s -w -X main.version={{ .Version }} -X main.revision={{ .ShortCommit }}"
+    ignore:
+      - goos: freebsd
+        goarch: arm
+      - goos: openbsd
+        goarch: arm
+      - goos: freebsd
+        goarch: arm64
+      - goos: openbsd
+        goarch: arm64
+
+# .goreleaser.yaml
+notarize:
+  macos:
+    - # Whether this configuration is enabled or not.
+      #
+      # Default: false.
+      # Templates: allowed.
+      enabled: "{{ not .IsSnapshot }}"
+
+      # Before notarizing, we need to sign the binary.
+      # This blocks defines the configuration for doing so.
+      sign:
+        # The .p12 certificate file path or its base64'd contents.
+        certificate: "{{.Env.MACOS_SIGN_P12}}"
+
+        # The password to be used to open the certificate.
+        password: "{{.Env.MACOS_SIGN_PASSWORD}}"
+
+      # Then, we notarize the binaries.
+      notarize:
+        # The issuer ID.
+        # Its the UUID you see when creating the App Store Connect key.
+        issuer_id: "{{.Env.MACOS_NOTARY_ISSUER_ID}}"
+
+        # Key ID.
+        # You can see it in the list of App Store Connect Keys.
+        # It will also be in the ApiKey filename.
+        key_id: "{{.Env.MACOS_NOTARY_KEY_ID}}"
+
+        # The .p8 key file path or its base64'd contents.
+        key: "{{.Env.MACOS_NOTARY_KEY}}"
+
+        # Whether to wait for the notarization to finish.
+        # Not recommended, as it could take a really long time.
+        wait: true
+
+archives:
+  - name_template: "{{ .ProjectName }}-{{ .Version }}-{{ .Os }}_{{ .Arch }}{{ if .Arm }}v{{ .Arm }}{{ end }}"
+    builds:
+      - fzf
+    format: tar.gz
+    format_overrides:
+      - goos: windows
+        format: zip
+    files:
+      - non-existent*
+
+release:
+  github:
+    owner: junegunn
+    name: fzf
+  prerelease: auto
+  name_template: '{{ .Version }}'
+
+snapshot:
+  name_template: "{{ .Version }}-devel"
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - README
+      - test

.rubocop.yml

@@ -0,0 +1,42 @@
+AllCops:
+  NewCops: enable
+Layout/LineLength:
+  Enabled: false
+Metrics:
+  Enabled: false
+Lint/ShadowingOuterLocalVariable:
+  Enabled: false
+Lint/NestedMethodDefinition:
+  Enabled: false
+Style/MethodCallWithArgsParentheses:
+  Enabled: true
+  AllowedMethods:
+    - assert
+    - exit
+    - paste
+    - puts
+    - raise
+    - refute
+    - require
+    - send_keys
+  AllowedPatterns:
+    - ^assert_
+    - ^refute_
+Style/NumericPredicate:
+  Enabled: false
+Style/StringConcatenation:
+  Enabled: false
+Style/OptionalBooleanParameter:
+  Enabled: false
+Style/WordArray:
+  MinSize: 1
+Minitest/AssertEqual:
+  Enabled: false
+Minitest/EmptyLineBeforeAssertionMethods:
+  Enabled: false
+Naming/VariableNumber:
+  Enabled: false
+Lint/EmptyBlock:
+  Enabled: false
+Style/SafeNavigationChainLength:
+  Enabled: false

.tool-versions

@@ -0,0 +1,2 @@
+golang 1.20.13
+ruby 3.4.1

.travis.yml

@@ -1,28 +0,0 @@
-language: ruby
-matrix:
-  include:
-    - env: TAGS=
-      rvm: 2.3.3
-#   - env: TAGS=tcell
-#     rvm: 2.2.0
-
-install:
-- sudo apt-get update
-- sudo apt-get install -y libncurses-dev lib32ncurses5-dev libgpm-dev
-- sudo add-apt-repository -y ppa:pi-rho/dev
-- sudo apt-add-repository -y ppa:fish-shell/release-2
-- sudo apt-get update
-- sudo apt-get install -y tmux=1.9a-1~ppa1~p
-- sudo apt-get install -y zsh fish
-
-script: |
-  export GOPATH=~/go
-  export FZF_BASE=$GOPATH/src/github.com/junegunn/fzf
-
-  mkdir -p $GOPATH/src/github.com/junegunn
-  ln -s $(pwd) $FZF_BASE
-
-  cd $FZF_BASE/src && make test fzf/fzf-linux_amd64 install &&
-  cd $FZF_BASE/bin && ln -sf fzf-linux_amd64 fzf-$(./fzf --version)-linux_amd64 &&
-  cd $FZF_BASE && yes | ./install && rm -f fzf &&
-  tmux new "ruby test/test_go.rb > out && touch ok" && cat out && [ -e ok ]

ADVANCED.md

@@ -0,0 +1,714 @@
+Advanced fzf examples
+======================
+
+* *Last update: 2025/02/02*
+* *Requires fzf 0.59.0 or later*
+
+---
+
+<!-- vim-markdown-toc GFM -->
+
+* [Introduction](#introduction)
+* [Display modes](#display-modes)
+    * [`--height`](#--height)
+    * [`--tmux`](#--tmux)
+* [Dynamic reloading of the list](#dynamic-reloading-of-the-list)
+    * [Updating the list of processes by pressing CTRL-R](#updating-the-list-of-processes-by-pressing-ctrl-r)
+    * [Toggling between data sources](#toggling-between-data-sources)
+    * [Toggling with a single key binding](#toggling-with-a-single-key-binding)
+* [Ripgrep integration](#ripgrep-integration)
+    * [Using fzf as the secondary filter](#using-fzf-as-the-secondary-filter)
+    * [Using fzf as interactive Ripgrep launcher](#using-fzf-as-interactive-ripgrep-launcher)
+    * [Switching to fzf-only search mode](#switching-to-fzf-only-search-mode)
+    * [Switching between Ripgrep mode and fzf mode](#switching-between-ripgrep-mode-and-fzf-mode)
+    * [Switching between Ripgrep mode and fzf mode using a single key binding](#switching-between-ripgrep-mode-and-fzf-mode-using-a-single-key-binding)
+    * [Controlling Ripgrep search and fzf search simultaneously](#controlling-ripgrep-search-and-fzf-search-simultaneously)
+* [Log tailing](#log-tailing)
+* [Key bindings for git objects](#key-bindings-for-git-objects)
+    * [Files listed in `git status`](#files-listed-in-git-status)
+    * [Branches](#branches)
+    * [Commit hashes](#commit-hashes)
+* [Color themes](#color-themes)
+    * [fzf Theme Playground](#fzf-theme-playground)
+    * [Generating fzf color theme from Vim color schemes](#generating-fzf-color-theme-from-vim-color-schemes)
+
+<!-- vim-markdown-toc -->
+
+Introduction
+------------
+
+fzf is an interactive [Unix filter][filter] program that is designed to be
+used with other Unix tools. It reads a list of items from the standard input,
+allows you to select a subset of the items, and prints the selected ones to
+the standard output. You can think of it as an interactive version of *grep*,
+and it's already useful even if you don't know any of its options.
+
+```sh
+# 1. ps:   Feed the list of processes to fzf
+# 2. fzf:  Interactively select a process using fuzzy matching algorithm
+# 3. awk:  Take the PID from the selected line
+# 3. kill: Kill the process with the PID
+ps -ef | fzf | awk '{print $2}' | xargs kill -9
+```
+
+[filter]: https://en.wikipedia.org/wiki/Filter_(software)
+
+While the above example succinctly summarizes the fundamental concept of fzf,
+you can build much more sophisticated interactive workflows using fzf once you
+learn its wide variety of features.
+
+- To see the full list of options and features, see `man fzf`
+- To see the latest additions, see [CHANGELOG.md](CHANGELOG.md)
+
+This document will guide you through some examples that will familiarize you
+with the advanced features of fzf.
+
+Display modes
+-------------
+
+### `--height`
+
+fzf by default opens in fullscreen mode, but it's not always desirable.
+Oftentimes, you want to see the current context of the terminal while using
+fzf. `--height` is an option for opening fzf below the cursor in
+non-fullscreen mode so you can still see the previous commands and their
+results above it.
+
+```sh
+fzf --height=40%
+```
+
+![image](https://user-images.githubusercontent.com/700826/113379893-c184c680-93b5-11eb-9676-c7c0a2f01748.png)
+
+You might also want to experiment with other layout options such as
+`--layout=reverse`, `--info=inline`, `--border`, `--margin`, etc.
+
+```sh
+fzf --height=40% --layout=reverse
+fzf --height=40% --layout=reverse --info=inline
+fzf --height=40% --layout=reverse --info=inline --border
+fzf --height=40% --layout=reverse --info=inline --border --margin=1
+fzf --height=40% --layout=reverse --info=inline --border --margin=1 --padding=1
+```
+
+![image](https://user-images.githubusercontent.com/700826/113379932-dfeac200-93b5-11eb-9e28-df1a2ee71f90.png)
+
+*(See man page to see the full list of options)*
+
+But you definitely don't want to repeat `--height=40% --layout=reverse
+--info=inline --border --margin=1 --padding=1` every time you use fzf. You
+could write a wrapper script or shell alias, but there is an easier option.
+Define `$FZF_DEFAULT_OPTS` like so:
+
+```sh
+export FZF_DEFAULT_OPTS="--height=40% --layout=reverse --info=inline --border --margin=1 --padding=1"
+```
+
+### `--tmux`
+
+(Requires tmux 3.3 or later)
+
+If you're using tmux, you can open fzf in a tmux popup using `--tmux` option.
+
+```sh
+# Open fzf in a tmux popup at the center of the screen with 70% width and height
+fzf --tmux 70%
+```
+
+![image](https://github.com/junegunn/fzf/assets/700826/9c365405-c700-49b2-8985-60d822ed4cff)
+
+`--tmux` option is silently ignored if you're not on tmux. So if you're trying
+to avoid opening fzf in fullscreen, try specifying both `--height` and `--tmux`.
+
+```sh
+# --tmux is specified later so it takes precedence over --height when on tmux.
+# If you're not on tmux, --tmux is ignored and --height is used instead.
+fzf  --height 70% --tmux 70%
+```
+
+You can also specify the position, width, and height of the popup window in
+the following format:
+
+* `[center|top|bottom|left|right][,SIZE[%]][,SIZE[%][,border-native]]`
+
+```sh
+# 100% width and 60% height
+fzf --tmux 100%,60% --border horizontal
+```
+
+![image](https://github.com/junegunn/fzf/assets/700826/f80d3514-d69f-42f2-a8de-a392a562bfcf)
+
+```sh
+# On the right (50% width)
+fzf --tmux right
+```
+
+![image](https://github.com/junegunn/fzf/assets/700826/4033ade4-7efa-421b-a3fb-a430d197098a)
+
+```sh
+# On the left (40% width and 70% height)
+fzf --tmux left,40%,70%
+```
+
+![image](https://github.com/junegunn/fzf/assets/700826/efe43881-2bf0-49ea-ab2e-1377f778cd52)
+
+> [!TIP]
+> You might also want to check out my tmux plugins which support this popup
+> window layout.
+>
+> - https://github.com/junegunn/tmux-fzf-url
+> - https://github.com/junegunn/tmux-fzf-maccy
+
+Dynamic reloading of the list
+-----------------------------
+
+fzf can dynamically update the candidate list using an arbitrary program with
+`reload` bindings (The design document for `reload` can be found
+[here][reload]).
+
+[reload]: https://github.com/junegunn/fzf/issues/1750
+
+### Updating the list of processes by pressing CTRL-R
+
+This example shows how you can set up a binding for dynamically updating the
+list without restarting fzf.
+
+```sh
+(date; ps -ef) |
+  fzf --bind='ctrl-r:reload(date; ps -ef)' \
+      --header=$'Press CTRL-R to reload\n\n' --header-lines=2 \
+      --preview='echo {}' --preview-window=down,3,wrap \
+      --layout=reverse --height=80% | awk '{print $2}' | xargs kill -9
+```
+
+![image](https://user-images.githubusercontent.com/700826/113465047-200c7c00-946c-11eb-918c-268f37a900c8.png)
+
+- The initial command is `(date; ps -ef)`. It prints the current date and
+  time, and the list of the processes.
+- With `--header` option, you can show any message as the fixed header.
+- To disallow selecting the first two lines (`date` and `ps` header), we use
+  `--header-lines=2` option.
+- `--bind='ctrl-r:reload(date; ps -ef)'` binds CTRL-R to `reload` action that
+  runs `date; ps -ef`, so we can update the list of the processes by pressing
+  CTRL-R.
+- We use simple `echo {}` preview option, so we can see the entire line on the
+  preview window below even if it's too long
+
+### Toggling between data sources
+
+You're not limited to just one reload binding. Set up multiple bindings so
+you can switch between data sources.
+
+```sh
+find * | fzf --prompt 'All> ' \
+             --header 'CTRL-D: Directories / CTRL-F: Files' \
+             --bind 'ctrl-d:change-prompt(Directories> )+reload(find * -type d)' \
+             --bind 'ctrl-f:change-prompt(Files> )+reload(find * -type f)'
+```
+
+![image](https://user-images.githubusercontent.com/700826/113465073-4af6d000-946c-11eb-858f-2372c0955f67.png)
+
+![image](https://user-images.githubusercontent.com/700826/113465072-46321c00-946c-11eb-9b6f-cda3951df579.png)
+
+### Toggling with a single key binding
+
+The above example uses two different key bindings to toggle between two modes,
+but can we just use a single key binding?
+
+To make a key binding behave differently each time it is pressed, we need:
+
+1. a way to store the current state. i.e. "which mode are we in?"
+2. and a way to dynamically perform different actions depending on the state.
+
+The following example shows how to 1. store the current mode in the prompt
+string, 2. and use this information (`$FZF_PROMPT`) to determine which
+actions to perform using the `transform` action.
+
+```sh
+fd --type file |
+  fzf --prompt 'Files> ' \
+      --header 'CTRL-T: Switch between Files/Directories' \
+      --bind 'ctrl-t:transform:[[ ! $FZF_PROMPT =~ Files ]] &&
+              echo "change-prompt(Files> )+reload(fd --type file)" ||
+              echo "change-prompt(Directories> )+reload(fd --type directory)"' \
+      --preview '[[ $FZF_PROMPT =~ Files ]] && bat --color=always {} || tree -C {}'
+```
+
+Ripgrep integration
+-------------------
+
+### Using fzf as the secondary filter
+
+* Requires [bat][bat]
+* Requires [Ripgrep][rg]
+
+[bat]: https://github.com/sharkdp/bat
+[rg]: https://github.com/BurntSushi/ripgrep
+
+fzf is pretty fast for filtering a list that you will rarely have to think
+about its performance. But it is not the right tool for searching for text
+inside many large files, and in that case you should definitely use something
+like [Ripgrep][rg].
+
+In the next example, Ripgrep is the primary filter that searches for the given
+text in files, and fzf is used as the secondary fuzzy filter that adds
+interactivity to the workflow. And we use [bat][bat] to show the matching line in
+the preview window.
+
+This is a bash script and it will not run as expected on other non-compliant
+shells. To avoid the compatibility issue, let's save this snippet as a script
+file called `rfv`.
+
+```bash
+#!/usr/bin/env bash
+
+# 1. Search for text in files using Ripgrep
+# 2. Interactively narrow down the list using fzf
+# 3. Open the file in Vim
+rg --color=always --line-number --no-heading --smart-case "${*:-}" |
+  fzf --ansi \
+      --color "hl:-1:underline,hl+:-1:underline:reverse" \
+      --delimiter : \
+      --preview 'bat --color=always {1} --highlight-line {2}' \
+      --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+      --bind 'enter:become(vim {1} +{2})'
+```
+
+And run it with an initial query string.
+
+```sh
+# Make the script executable
+chmod +x rfv
+
+# Run it with the initial query "algo"
+./rfv algo
+```
+
+> Ripgrep will perform the initial search and list all the lines that contain
+`algo`. Then we further narrow down the list on fzf.
+
+![image](https://user-images.githubusercontent.com/700826/113683873-a42a6200-96ff-11eb-9666-26ce4091b0e4.png)
+
+I know it's a lot to digest, let's try to break down the code.
+
+- Ripgrep prints the matching lines in the following format
+  ```
+  man/man1/fzf.1:54:.BI "--algo=" TYPE
+  man/man1/fzf.1:55:Fuzzy matching algorithm (default: v2)
+  man/man1/fzf.1:58:.BR v2 "     Optimal scoring algorithm (quality)"
+  src/pattern_test.go:7:  "github.com/junegunn/fzf/src/algo"
+  ```
+  The first token delimited by `:` is the file path, and the second token is
+  the line number of the matching line. They respectively correspond to `{1}`
+  and `{2}` in the preview command.
+    - `--preview 'bat --color=always {1} --highlight-line {2}'`
+- As we run `rg` with `--color=always` option, we should tell fzf to parse
+  ANSI color codes in the input by setting `--ansi`.
+- We customize how fzf colors various text elements using `--color` option.
+  `-1` tells fzf to keep the original color from the input. See `man fzf` for
+  available color options.
+- The value of `--preview-window` option consists of 5 components delimited
+  by `,`
+    1. `up` — Position of the preview window
+    1. `60%` — Size of the preview window
+    1. `border-bottom` — Preview window border only on the bottom side
+    1. `+{2}+3/3` — Scroll offset of the preview contents
+    1. `~3` — Fixed header
+- Let's break down the latter two. We want to display the bat output in the
+  preview window with a certain scroll offset so that the matching line is
+  positioned near the center of the preview window.
+    - `+{2}` — The base offset is extracted from the second token
+    - `+3` — We add 3 lines to the base offset to compensate for the header
+      part of `bat` output
+        - ```
+          ───────┬──────────────────────────────────────────────────────────
+                 │ File: CHANGELOG.md
+          ───────┼──────────────────────────────────────────────────────────
+             1   │ CHANGELOG
+             2   │ =========
+             3   │
+             4   │ 0.26.0
+             5   │ ------
+          ```
+    - `/3` adjusts the offset so that the matching line is shown at a third
+      position in the window
+    - `~3` makes the top three lines fixed header so that they are always
+      visible regardless of the scroll offset
+- Instead of using shell script to process the final output of fzf, we use
+  `become(...)` action which was added in [fzf 0.38.0][0.38.0] to turn fzf
+  into a new process that opens the file with `vim` (`vim {1}`) and move the
+  cursor to the line (`+{2}`).
+
+[0.38.0]: https://github.com/junegunn/fzf/blob/master/CHANGELOG.md#0380
+
+### Using fzf as interactive Ripgrep launcher
+
+We have learned that we can bind `reload` action to a key (e.g.
+`--bind=ctrl-r:execute(ps -ef)`). In the next example, we are going to **bind
+`reload` action to `change` event** so that whenever the user *changes* the
+query string on fzf, `reload` action is triggered.
+
+Here is a variation of the above `rfv` script. fzf will restart Ripgrep every
+time the user updates the query string on fzf. Searching and filtering is
+completely done by Ripgrep, and fzf merely provides the interactive interface.
+So we lose the "fuzziness", but the performance will be better on larger
+projects, and it will free up memory as you narrow down the results.
+
+```bash
+#!/usr/bin/env bash
+
+# 1. Search for text in files using Ripgrep
+# 2. Interactively restart Ripgrep with reload action
+# 3. Open the file in Vim
+RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+INITIAL_QUERY="${*:-}"
+fzf --ansi --disabled --query "$INITIAL_QUERY" \
+    --bind "start:reload:$RG_PREFIX {q}" \
+    --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
+    --delimiter : \
+    --preview 'bat --color=always {1} --highlight-line {2}' \
+    --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+    --bind 'enter:become(vim {1} +{2})'
+```
+
+![image](https://user-images.githubusercontent.com/700826/113684212-f9ff0a00-96ff-11eb-8737-7bb571d320cc.png)
+
+- Instead of starting fzf in the usual `rg ... | fzf` form, we make it start
+  the initial Ripgrep process immediately via `start:reload` binding for the
+  consistency of the code.
+- Filtering is no longer a responsibility of fzf; hence `--disabled`
+- `{q}` in the reload command evaluates to the query string on fzf prompt.
+- `sleep 0.1` in the reload command is for "debouncing". This small delay will
+  reduce the number of intermediate Ripgrep processes while we're typing in
+  a query.
+
+### Switching to fzf-only search mode
+
+In the previous example, we lost fuzzy matching capability as we completely
+delegated search functionality to Ripgrep. But we can dynamically switch to
+fzf-only search mode by *"unbinding"* `reload` action from `change` event.
+
+```sh
+#!/usr/bin/env bash
+
+# Two-phase filtering with Ripgrep and fzf
+#
+# 1. Search for text in files using Ripgrep
+# 2. Interactively restart Ripgrep with reload action
+#    * Press alt-enter to switch to fzf-only filtering
+# 3. Open the file in Vim
+RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+INITIAL_QUERY="${*:-}"
+fzf --ansi --disabled --query "$INITIAL_QUERY" \
+    --bind "start:reload:$RG_PREFIX {q}" \
+    --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
+    --bind "alt-enter:unbind(change,alt-enter)+change-prompt(2. fzf> )+enable-search+clear-query" \
+    --color "hl:-1:underline,hl+:-1:underline:reverse" \
+    --prompt '1. ripgrep> ' \
+    --delimiter : \
+    --preview 'bat --color=always {1} --highlight-line {2}' \
+    --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+    --bind 'enter:become(vim {1} +{2})'
+```
+
+* Phase 1. Filtering with Ripgrep
+![image](https://user-images.githubusercontent.com/700826/119213880-735e8a80-bafd-11eb-8493-123e4be24fbc.png)
+* Phase 2. Filtering with fzf
+![image](https://user-images.githubusercontent.com/700826/119213887-7e191f80-bafd-11eb-98c9-71a1af9d7aab.png)
+
+- We added `--prompt` option to show that fzf is initially running in "Ripgrep
+  launcher mode".
+- We added `alt-enter` binding that
+    1. unbinds `change` event, so Ripgrep is no longer restarted on key press
+    2. changes the prompt to `2. fzf>`
+    3. enables search functionality of fzf
+    4. clears the current query string that was used to start Ripgrep process
+    5. and unbinds `alt-enter` itself as this is a one-off event
+- We reverted `--color` option for customizing how the matching chunks are
+  displayed in the second phase
+
+### Switching between Ripgrep mode and fzf mode
+
+[fzf 0.30.0][0.30.0] added `rebind` action so we can "rebind" the bindings
+that were previously "unbound" via `unbind`.
+
+This is an improved version of the previous example that allows us to switch
+between Ripgrep launcher mode and fzf-only filtering mode via CTRL-R and
+CTRL-F.
+
+```sh
+#!/usr/bin/env bash
+
+# Switch between Ripgrep launcher mode (CTRL-R) and fzf filtering mode (CTRL-F)
+rm -f /tmp/rg-fzf-{r,f}
+RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+INITIAL_QUERY="${*:-}"
+fzf --ansi --disabled --query "$INITIAL_QUERY" \
+    --bind "start:reload($RG_PREFIX {q})+unbind(ctrl-r)" \
+    --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
+    --bind "ctrl-f:unbind(change,ctrl-f)+change-prompt(2. fzf> )+enable-search+rebind(ctrl-r)+transform-query(echo {q} > /tmp/rg-fzf-r; cat /tmp/rg-fzf-f)" \
+    --bind "ctrl-r:unbind(ctrl-r)+change-prompt(1. ripgrep> )+disable-search+reload($RG_PREFIX {q} || true)+rebind(change,ctrl-f)+transform-query(echo {q} > /tmp/rg-fzf-f; cat /tmp/rg-fzf-r)" \
+    --color "hl:-1:underline,hl+:-1:underline:reverse" \
+    --prompt '1. ripgrep> ' \
+    --delimiter : \
+    --header '╱ CTRL-R (ripgrep mode) ╱ CTRL-F (fzf mode) ╱' \
+    --preview 'bat --color=always {1} --highlight-line {2}' \
+    --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+    --bind 'enter:become(vim {1} +{2})'
+```
+
+- To restore the query string when switching between modes, we store the
+  current query in `/tmp/rg-fzf-{r,f}` files and restore the query using
+  `transform-query` action which was added in [fzf 0.36.0][0.36.0].
+- Also note that we unbind `ctrl-r` binding on `start` event which is
+  triggered once when fzf starts.
+
+[0.30.0]: https://github.com/junegunn/fzf/blob/master/CHANGELOG.md#0300
+[0.36.0]: https://github.com/junegunn/fzf/blob/master/CHANGELOG.md#0360
+
+### Switching between Ripgrep mode and fzf mode using a single key binding
+
+In contrast to the previous version, we use just one hotkey to toggle between
+ripgrep and fzf mode. This is achieved by using the `$FZF_PROMPT` as a state
+within the `transform` action, a feature introduced in [fzf 0.45.0][0.45.0]. A
+more detailed explanation of this feature can be found in a previous section -
+[Toggling with a single keybinding](#toggling-with-a-single-key-binding).
+
+[0.45.0]: https://github.com/junegunn/fzf/blob/master/CHANGELOG.md#0450
+
+When using the `transform` action, the placeholder (`\{q}`) should be escaped to
+prevent immediate evaluation.
+
+```sh
+#!/usr/bin/env bash
+
+# Switch between Ripgrep mode and fzf filtering mode (CTRL-T)
+rm -f /tmp/rg-fzf-{r,f}
+RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+INITIAL_QUERY="${*:-}"
+fzf --ansi --disabled --query "$INITIAL_QUERY" \
+    --bind "start:reload:$RG_PREFIX {q}" \
+    --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
+    --bind 'ctrl-t:transform:[[ ! $FZF_PROMPT =~ ripgrep ]] &&
+      echo "rebind(change)+change-prompt(1. ripgrep> )+disable-search+transform-query:echo \{q} > /tmp/rg-fzf-f; cat /tmp/rg-fzf-r" ||
+      echo "unbind(change)+change-prompt(2. fzf> )+enable-search+transform-query:echo \{q} > /tmp/rg-fzf-r; cat /tmp/rg-fzf-f"' \
+    --color "hl:-1:underline,hl+:-1:underline:reverse" \
+    --prompt '1. ripgrep> ' \
+    --delimiter : \
+    --header 'CTRL-T: Switch between ripgrep/fzf' \
+    --preview 'bat --color=always {1} --highlight-line {2}' \
+    --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+    --bind 'enter:become(vim {1} +{2})'
+```
+
+### Controlling Ripgrep search and fzf search simultaneously
+
+`search` and `transform-search` action allow you to trigger an fzf search with
+an arbitrary query string. This frees fzf from strictly following the prompt
+input, enabling custom search syntax.
+
+In the example below, `transform` action is used to conditionally trigger
+`reload` for ripgrep, followed by `search` for fzf. The first word of the
+query initiates the Ripgrep process to generate the initial results, while the
+remainder of the query is passed to fzf for secondary filtering.
+
+```sh
+#!/usr/bin/env bash
+
+export TEMP=$(mktemp -u)
+trap 'rm -f "$TEMP"' EXIT
+
+INITIAL_QUERY="${*:-}"
+TRANSFORMER='
+  rg_pat={q:1}      # The first word is passed to ripgrep
+  fzf_pat={q:2..}   # The rest are passed to fzf
+
+  if ! [[ -r "$TEMP" ]] || [[ $rg_pat != $(cat "$TEMP") ]]; then
+    echo "$rg_pat" > "$TEMP"
+    printf "reload:sleep 0.1; rg --column --line-number --no-heading --color=always --smart-case %q || true" "$rg_pat"
+  fi
+  echo "+search:$fzf_pat"
+'
+fzf --ansi --disabled --query "$INITIAL_QUERY" \
+    --with-shell 'bash -c' \
+    --bind "start,change:transform:$TRANSFORMER" \
+    --color "hl:-1:underline,hl+:-1:underline:reverse" \
+    --delimiter : \
+    --preview 'bat --color=always {1} --highlight-line {2}' \
+    --preview-window 'up,60%,border-line,+{2}+3/3,~3' \
+    --bind 'enter:become(vim {1} +{2})'
+```
+
+Log tailing
+-----------
+
+fzf can run long-running preview commands and render partial results before
+completion. And when you specify `follow` flag in `--preview-window` option,
+fzf will "`tail -f`" the result, automatically scrolling to the bottom.
+
+```bash
+# With "follow", preview window will automatically scroll to the bottom.
+# "\033[2J" is an ANSI escape sequence for clearing the screen.
+# When fzf reads this code it clears the previous preview contents.
+fzf --preview-window follow --preview 'for i in $(seq 100000); do
+  echo "$i"
+  sleep 0.01
+  (( i % 300 == 0 )) && printf "\033[2J"
+done'
+```
+
+![image](https://user-images.githubusercontent.com/700826/113473303-dd669600-94a3-11eb-88a9-1f61b996bb0e.png)
+
+Admittedly, that was a silly example. Here's a practical one for browsing
+Kubernetes pods.
+
+```bash
+pods() {
+  command='kubectl get pods --all-namespaces' fzf \
+    --info=inline --layout=reverse --header-lines=1 \
+    --prompt "$(kubectl config current-context | sed 's/-context$//')> " \
+    --header $'╱ Enter (kubectl exec) ╱ CTRL-O (open log in editor) ╱ CTRL-R (reload) ╱\n\n' \
+    --bind 'start,ctrl-r:reload:$command' \
+    --bind 'ctrl-/:change-preview-window(80%,border-bottom|hidden|)' \
+    --bind 'enter:execute:kubectl exec -it --namespace {1} {2} -- bash' \
+    --bind 'ctrl-o:execute:${EDITOR:-vim} <(kubectl logs --all-containers --namespace {1} {2})' \
+    --preview-window up:follow \
+    --preview 'kubectl logs --follow --all-containers --tail=10000 --namespace {1} {2}' "$@"
+}
+```
+
+![image](https://user-images.githubusercontent.com/700826/113473547-1d7a4880-94a5-11eb-98ef-9aa6f0ed215a.png)
+
+- The preview window will *"log tail"* the pod
+    - Holding on to a large amount of log will consume a lot of memory. So we
+      limited the initial log amount with `--tail=10000`.
+- `execute` bindings allow you to run any command without leaving fzf
+    - Press enter key on a pod to `kubectl exec` into it
+    - Press CTRL-O to open the log in your editor
+- Press CTRL-R to reload the pod list
+- Press CTRL-/ repeatedly to rotate through a different sets of preview
+  window options
+    1. `80%,border-bottom`
+    1. `hidden`
+    1. Empty string after `|` translates to the default options from `--preview-window`
+
+Key bindings for git objects
+----------------------------
+
+Oftentimes, you want to put the identifiers of various Git object to the
+command-line. For example, it is common to write commands like these:
+
+```sh
+git checkout [SOME_COMMIT_HASH or BRANCH or TAG]
+git diff [SOME_COMMIT_HASH or BRANCH or TAG] [SOME_COMMIT_HASH or BRANCH or TAG]
+```
+
+[fzf-git.sh](https://github.com/junegunn/fzf-git.sh) project defines a set of
+fzf-based key bindings for Git objects. I strongly recommend that you check
+them out because they are seriously useful.
+
+### Files listed in `git status`
+
+<kbd>CTRL-G</kbd><kbd>CTRL-F</kbd>
+
+![image](https://user-images.githubusercontent.com/700826/113473779-a9d93b00-94a6-11eb-87b5-f62a8d0a0efc.png)
+
+### Branches
+
+<kbd>CTRL-G</kbd><kbd>CTRL-B</kbd>
+
+![image](https://user-images.githubusercontent.com/700826/113473758-87dfb880-94a6-11eb-82f4-9218103f10bd.png)
+
+### Commit hashes
+
+<kbd>CTRL-G</kbd><kbd>CTRL-H</kbd>
+
+![image](https://user-images.githubusercontent.com/700826/113473765-91692080-94a6-11eb-8d38-ed4d41f27ac1.png)
+
+Color themes
+------------
+
+You can customize how fzf colors the text elements with `--color` option. Here
+are a few color themes. Note that you need a terminal emulator that can
+display 24-bit colors.
+
+```sh
+# junegunn/seoul256.vim (dark)
+export FZF_DEFAULT_OPTS='--color=bg+:#3F3F3F,bg:#4B4B4B,border:#6B6B6B,spinner:#98BC99,hl:#719872,fg:#D9D9D9,header:#719872,info:#BDBB72,pointer:#E12672,marker:#E17899,fg+:#D9D9D9,preview-bg:#3F3F3F,prompt:#98BEDE,hl+:#98BC99'
+```
+
+![seoul256](https://user-images.githubusercontent.com/700826/113475011-2c192d80-94ae-11eb-9d17-1e5867bae01f.png)
+
+```sh
+# junegunn/seoul256.vim (light)
+export FZF_DEFAULT_OPTS='--color=bg+:#D9D9D9,bg:#E1E1E1,border:#C8C8C8,spinner:#719899,hl:#719872,fg:#616161,header:#719872,info:#727100,pointer:#E12672,marker:#E17899,fg+:#616161,preview-bg:#D9D9D9,prompt:#0099BD,hl+:#719899'
+```
+
+![seoul256-light](https://user-images.githubusercontent.com/700826/113475022-389d8600-94ae-11eb-905f-0939dd535837.png)
+
+```sh
+# morhetz/gruvbox
+export FZF_DEFAULT_OPTS='--color=bg+:#3c3836,bg:#32302f,spinner:#fb4934,hl:#928374,fg:#ebdbb2,header:#928374,info:#8ec07c,pointer:#fb4934,marker:#fb4934,fg+:#ebdbb2,prompt:#fb4934,hl+:#fb4934'
+```
+
+![gruvbox](https://user-images.githubusercontent.com/700826/113475042-494dfc00-94ae-11eb-9322-cd03a027305a.png)
+
+```sh
+# arcticicestudio/nord-vim
+export FZF_DEFAULT_OPTS='--color=bg+:#3B4252,bg:#2E3440,spinner:#81A1C1,hl:#616E88,fg:#D8DEE9,header:#616E88,info:#81A1C1,pointer:#81A1C1,marker:#81A1C1,fg+:#D8DEE9,prompt:#81A1C1,hl+:#81A1C1'
+```
+
+![nord](https://user-images.githubusercontent.com/700826/113475063-67b3f780-94ae-11eb-9b24-5f0d22b63399.png)
+
+```sh
+# tomasr/molokai
+export FZF_DEFAULT_OPTS='--color=bg+:#293739,bg:#1B1D1E,border:#808080,spinner:#E6DB74,hl:#7E8E91,fg:#F8F8F2,header:#7E8E91,info:#A6E22E,pointer:#A6E22E,marker:#F92672,fg+:#F8F8F2,prompt:#F92672,hl+:#F92672'
+```
+
+![molokai](https://user-images.githubusercontent.com/700826/113475085-8619f300-94ae-11eb-85e4-2766fc3246bf.png)
+
+### fzf Theme Playground
+
+[fzf Theme Playground](https://vitormv.github.io/fzf-themes/) created by
+[Vitor Mello](https://github.com/vitormv) is a webpage where you can
+interactively create fzf themes.
+
+### Generating fzf color theme from Vim color schemes
+
+The Vim plugin of fzf can generate `--color` option from the current color
+scheme according to `g:fzf_colors` variable. You can find the detailed
+explanation [here](https://github.com/junegunn/fzf/blob/master/README-VIM.md#explanation-of-gfzf_colors).
+
+Here is an example. Add this to your Vim configuration file.
+
+```vim
+let g:fzf_colors =
+\ { 'fg':         ['fg', 'Normal'],
+  \ 'bg':         ['bg', 'Normal'],
+  \ 'preview-bg': ['bg', 'NormalFloat'],
+  \ 'hl':         ['fg', 'Comment'],
+  \ 'fg+':        ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
+  \ 'bg+':        ['bg', 'CursorLine', 'CursorColumn'],
+  \ 'hl+':        ['fg', 'Statement'],
+  \ 'info':       ['fg', 'PreProc'],
+  \ 'border':     ['fg', 'Ignore'],
+  \ 'prompt':     ['fg', 'Conditional'],
+  \ 'pointer':    ['fg', 'Exception'],
+  \ 'marker':     ['fg', 'Keyword'],
+  \ 'spinner':    ['fg', 'Label'],
+  \ 'header':     ['fg', 'Comment'] }
+```
+
+Then you can see how the `--color` option is generated by printing the result
+of `fzf#wrap()`.
+
+```vim
+:echo fzf#wrap()
+```
+
+Use this command to append `export FZF_DEFAULT_OPTS="..."` line to the end of
+the current file.
+
+```vim
+:call append('$', printf('export FZF_DEFAULT_OPTS="%s"', matchstr(fzf#wrap().options, "--color[^']*")))
+```

BUILD.md

@@ -6,101 +6,56 @@ Build instructions
 
 ### Prerequisites
 
-- `go` executable in $PATH
+- Go 1.20 or above
 
 ### Using Makefile
 
-Makefile will set up and use its own `$GOPATH` under the project root.
-
 ```sh
-# Source files are located in src directory
-cd src
-
-# Build fzf binary for your platform in src/fzf
+# Build fzf binary for your platform in target
 make
 
 # Build fzf binary and copy it to bin directory
 make install
 
-# Build 32-bit and 64-bit executables and tarballs
+# Build fzf binaries and archives for all platforms using goreleaser
+make build
+
+# Publish GitHub release
 make release
-
-# Build executables and tarballs for Linux using Docker
-make linux
 ```
 
-### Using `go get`
+> [!WARNING]
+> Makefile uses git commands to determine the version and the revision
+> information for `fzf --version`. So if you're building fzf from an
+> environment where its git information is not available, you have to manually
+> set `$FZF_VERSION` and `$FZF_REVISION`.
+>
+> e.g. `FZF_VERSION=0.24.0 FZF_REVISION=tarball make`
 
-Alternatively, you can build fzf directly with `go get` command without
-cloning the repository.
-
-```sh
-go get -u github.com/junegunn/fzf/src/fzf
-```
-
-Build options
--------------
-
-### With ncurses 6
-
-The official binaries of fzf are built with ncurses 5 because it's widely
-supported by different platforms. However ncurses 5 is old and has a number of
-limitations.
-
-1. Does not support more than 256 color pairs (See [357][357])
-2. Does not support italics
-3. Does not support 24-bit color
-
-[357]: https://github.com/junegunn/fzf/issues/357
-
-But you can manually build fzf with ncurses 6 to overcome some of these
-limitations. ncurses 6 supports up to 32767 color pairs (1), and supports
-italics (2). To build fzf with ncurses 6, you have to install it first. On
-macOS, you can use Homebrew to install it.
-
-```sh
-brew install homebrew/dupes/ncurses
-LDFLAGS="-L/usr/local/opt/ncurses/lib" make install
-```
-
-### With tcell
-
-[tcell][tcell] is a portable alternative to ncurses and we currently use it to
-build Windows binaries. tcell has many benefits but most importantly, it
-supports 24-bit colors. To build fzf with tcell:
-
-```sh
-TAGS=tcell make install
-```
-
-However, note that tcell has its own issues.
-
-- Poor rendering performance compared to ncurses
-- Does not support bracketed-paste mode
-- Does not support italics unlike ncurses 6
-- Some wide characters are not correctly displayed
+> [!TIP]
+> To build fzf with profiling options enabled, set `TAGS=pprof`
+>
+> ```sh
+> TAGS=pprof make clean install
+> fzf --profile-cpu /tmp/cpu.pprof --profile-mem /tmp/mem.pprof \
+>     --profile-block /tmp/block.pprof --profile-mutex /tmp/mutex.pprof
+> ```
 
 Third-party libraries used
 --------------------------
 
-- [ncurses][ncurses]
-- [mattn/go-runewidth](https://github.com/mattn/go-runewidth)
-    - Licensed under [MIT](http://mattn.mit-license.org)
+- [rivo/uniseg](https://github.com/rivo/uniseg)
+    - Licensed under [MIT](https://raw.githubusercontent.com/rivo/uniseg/master/LICENSE.txt)
 - [mattn/go-shellwords](https://github.com/mattn/go-shellwords)
     - Licensed under [MIT](http://mattn.mit-license.org)
 - [mattn/go-isatty](https://github.com/mattn/go-isatty)
     - Licensed under [MIT](http://mattn.mit-license.org)
 - [tcell](https://github.com/gdamore/tcell)
     - Licensed under [Apache License 2.0](https://github.com/gdamore/tcell/blob/master/LICENSE)
+- [fastwalk](https://github.com/charlievieth/fastwalk)
+    - Licensed under [MIT](https://raw.githubusercontent.com/charlievieth/fastwalk/master/LICENSE)
 
 License
 -------
 
 [MIT](LICENSE)
-
-[install]: https://github.com/junegunn/fzf#installation
-[go]:      https://golang.org/
-[gil]:     http://en.wikipedia.org/wiki/Global_Interpreter_Lock
-[ncurses]: https://www.gnu.org/software/ncurses/
-[req]:     http://golang.org/doc/install
-[tcell]:   https://github.com/gdamore/tcell

Dockerfile

@@ -0,0 +1,12 @@
+FROM rubylang/ruby:3.4.1-noble
+RUN apt-get update -y && apt install -y git make golang zsh fish tmux
+RUN gem install --no-document -v 5.22.3 minitest
+RUN echo '. /usr/share/bash-completion/completions/git' >> ~/.bashrc
+RUN echo '. ~/.bashrc' >> ~/.bash_profile
+
+# Do not set default PS1
+RUN rm -f /etc/bash.bashrc
+COPY . /fzf
+RUN cd /fzf && make install && ./install --all
+ENV LANG=C.UTF-8
+CMD ["bash", "-ic", "tmux new 'set -o pipefail; ruby /fzf/test/runner.rb | tee out && touch ok' && cat out && [ -e ok ]"]

Gemfile

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+gem 'minitest', '5.25.4'
+gem 'rubocop', '1.71.0'
+gem 'rubocop-minitest', '0.36.0'
+gem 'rubocop-performance', '1.23.1'

Gemfile.lock

@@ -0,0 +1,47 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ast (2.4.2)
+    json (2.9.1)
+    language_server-protocol (3.17.0.3)
+    minitest (5.25.4)
+    parallel (1.26.3)
+    parser (3.3.7.0)
+      ast (~> 2.4.1)
+      racc
+    racc (1.8.1)
+    rainbow (3.1.1)
+    regexp_parser (2.10.0)
+    rubocop (1.71.0)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.36.2, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.37.0)
+      parser (>= 3.3.1.0)
+    rubocop-minitest (0.36.0)
+      rubocop (>= 1.61, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
+    rubocop-performance (1.23.1)
+      rubocop (>= 1.48.1, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
+    ruby-progressbar (1.13.0)
+    unicode-display_width (2.6.0)
+
+PLATFORMS
+  arm64-darwin-23
+  ruby
+
+DEPENDENCIES
+  minitest (= 5.25.4)
+  rubocop (= 1.71.0)
+  rubocop-minitest (= 0.36.0)
+  rubocop-performance (= 1.23.1)
+
+BUNDLED WITH
+   2.6.2

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2016 Junegunn Choi
+Copyright (c) 2013-2024 Junegunn Choi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Makefile

@@ -0,0 +1,192 @@
+GO             ?= go
+GOOS           ?= $(shell $(GO) env GOOS)
+
+MAKEFILE       := $(realpath $(lastword $(MAKEFILE_LIST)))
+ROOT_DIR       := $(shell dirname $(MAKEFILE))
+SOURCES        := $(wildcard *.go src/*.go src/*/*.go shell/*sh man/man1/*.1) $(MAKEFILE)
+
+ifdef FZF_VERSION
+VERSION        := $(FZF_VERSION)
+else
+VERSION        := $(shell git describe --abbrev=0 2> /dev/null | sed "s/^v//")
+endif
+ifeq ($(VERSION),)
+$(error Not on git repository; cannot determine $$FZF_VERSION)
+endif
+VERSION_TRIM   := $(shell echo $(VERSION) | sed "s/^v//; s/-.*//")
+VERSION_REGEX  := $(subst .,\.,$(VERSION_TRIM))
+
+ifdef FZF_REVISION
+REVISION       := $(FZF_REVISION)
+else
+REVISION       := $(shell git log -n 1 --pretty=format:%h --abbrev=8 -- $(SOURCES) 2> /dev/null)
+endif
+ifeq ($(REVISION),)
+$(error Not on git repository; cannot determine $$FZF_REVISION)
+endif
+BUILD_FLAGS    := -a -ldflags "-s -w -X main.version=$(VERSION) -X main.revision=$(REVISION)" -tags "$(TAGS)" -trimpath
+
+BINARY32       := fzf-$(GOOS)_386
+BINARY64       := fzf-$(GOOS)_amd64
+BINARYS390     := fzf-$(GOOS)_s390x
+BINARYARM5     := fzf-$(GOOS)_arm5
+BINARYARM6     := fzf-$(GOOS)_arm6
+BINARYARM7     := fzf-$(GOOS)_arm7
+BINARYARM8     := fzf-$(GOOS)_arm8
+BINARYPPC64LE  := fzf-$(GOOS)_ppc64le
+BINARYRISCV64  := fzf-$(GOOS)_riscv64
+BINARYLOONG64  := fzf-$(GOOS)_loong64
+
+# https://en.wikipedia.org/wiki/Uname
+UNAME_M := $(shell uname -m)
+ifeq ($(UNAME_M),x86_64)
+	BINARY := $(BINARY64)
+else ifeq ($(UNAME_M),amd64)
+	BINARY := $(BINARY64)
+else ifeq ($(UNAME_M),s390x)
+	BINARY := $(BINARYS390)
+else ifeq ($(UNAME_M),i686)
+	BINARY := $(BINARY32)
+else ifeq ($(UNAME_M),i386)
+	BINARY := $(BINARY32)
+else ifeq ($(UNAME_M),armv5l)
+	BINARY := $(BINARYARM5)
+else ifeq ($(UNAME_M),armv6l)
+	BINARY := $(BINARYARM6)
+else ifeq ($(UNAME_M),armv7l)
+	BINARY := $(BINARYARM7)
+else ifeq ($(UNAME_M),armv8l)
+	# armv8l is always 32-bit and should implement the armv7 ISA, so
+	# just use the same filename as for armv7.
+	BINARY := $(BINARYARM7)
+else ifeq ($(UNAME_M),arm64)
+	BINARY := $(BINARYARM8)
+else ifeq ($(UNAME_M),aarch64)
+	BINARY := $(BINARYARM8)
+else ifeq ($(UNAME_M),ppc64le)
+	BINARY := $(BINARYPPC64LE)
+else ifeq ($(UNAME_M),riscv64)
+	BINARY := $(BINARYRISCV64)
+else ifeq ($(UNAME_M),loongarch64)
+	BINARY := $(BINARYLOONG64)
+else
+$(error Build on $(UNAME_M) is not supported, yet.)
+endif
+
+all: target/$(BINARY)
+
+test: $(SOURCES)
+	SHELL=/bin/sh GOOS= $(GO) test -v -tags "$(TAGS)" \
+				github.com/junegunn/fzf/src \
+				github.com/junegunn/fzf/src/algo \
+				github.com/junegunn/fzf/src/tui \
+				github.com/junegunn/fzf/src/util
+
+itest:
+	ruby test/runner.rb
+
+bench:
+	cd src && SHELL=/bin/sh GOOS= $(GO) test -v -tags "$(TAGS)" -run=Bench -bench=. -benchmem
+
+lint: $(SOURCES) test/*.rb test/lib/*.rb
+	[ -z "$$(gofmt -s -d src)" ] || (gofmt -s -d src; exit 1)
+	bundle exec rubocop -a --require rubocop-minitest --require rubocop-performance
+
+install: bin/fzf
+
+generate:
+	PATH=$(PATH):$(GOPATH)/bin $(GO) generate ./...
+
+build:
+	goreleaser build --clean --snapshot --skip=post-hooks
+
+release:
+	# Make sure that the tests pass and the build works
+	TAGS=tcell make test
+	make test build clean
+
+ifndef GITHUB_TOKEN
+	$(error GITHUB_TOKEN is not defined)
+endif
+
+	# Check if we are on master branch
+ifneq ($(shell git symbolic-ref --short HEAD),master)
+	$(error Not on master branch)
+endif
+
+	# Check if version numbers are properly updated
+	grep -q ^$(VERSION_REGEX)$$ CHANGELOG.md
+	grep -qF '"fzf $(VERSION_TRIM)"' man/man1/fzf.1
+	grep -qF '"fzf $(VERSION_TRIM)"' man/man1/fzf-tmux.1
+	grep -qF $(VERSION) install
+	grep -qF $(VERSION) install.ps1
+
+	# Make release note out of CHANGELOG.md
+	mkdir -p tmp
+	sed -n '/^$(VERSION_REGEX)$$/,/^[0-9]/p' CHANGELOG.md | tail -r | \
+		sed '1,/^ *$$/d' | tail -r | sed 1,2d | tee tmp/release-note
+
+	# Push to temp branch first so that install scripts always works on master branch
+	git checkout -B temp master
+	git push origin temp --follow-tags --force
+
+	# Make a GitHub release
+	goreleaser --clean --release-notes tmp/release-note
+
+	# Push to master
+	git checkout master
+	git push origin master
+
+	# Delete temp branch
+	git push origin --delete temp
+
+clean:
+	$(RM) -r dist target
+
+target/$(BINARY32): $(SOURCES)
+	GOARCH=386 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARY64): $(SOURCES)
+	GOARCH=amd64 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYS390): $(SOURCES)
+	GOARCH=s390x $(GO) build $(BUILD_FLAGS) -o $@
+# https://github.com/golang/go/wiki/GoArm
+target/$(BINARYARM5): $(SOURCES)
+	GOARCH=arm GOARM=5 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYARM6): $(SOURCES)
+	GOARCH=arm GOARM=6 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYARM7): $(SOURCES)
+	GOARCH=arm GOARM=7 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYARM8): $(SOURCES)
+	GOARCH=arm64 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYPPC64LE): $(SOURCES)
+	GOARCH=ppc64le $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYRISCV64): $(SOURCES)
+	GOARCH=riscv64 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYLOONG64): $(SOURCES)
+	GOARCH=loong64 $(GO) build $(BUILD_FLAGS) -o $@
+
+bin/fzf: target/$(BINARY) | bin
+	-rm -f bin/fzf
+	cp -f target/$(BINARY) bin/fzf
+
+docker:
+	docker build -t fzf-ubuntu .
+	docker run -it fzf-ubuntu tmux
+
+docker-test:
+	docker build -t fzf-ubuntu .
+	docker run -it fzf-ubuntu
+
+update:
+	$(GO) get -u
+	$(GO) mod tidy
+
+.PHONY: all generate build release test itest bench lint install clean docker docker-test update

README-VIM.md

@@ -0,0 +1,496 @@
+FZF Vim integration
+===================
+
+Installation
+------------
+
+Once you have fzf installed, you can enable it inside Vim simply by adding the
+directory to `&runtimepath` in your Vim configuration file. The path may
+differ depending on the package manager.
+
+```vim
+" If installed using Homebrew
+set rtp+=/usr/local/opt/fzf
+
+" If installed using Homebrew on Apple Silicon
+set rtp+=/opt/homebrew/opt/fzf
+
+" If you have cloned fzf on ~/.fzf directory
+set rtp+=~/.fzf
+```
+
+If you use [vim-plug](https://github.com/junegunn/vim-plug), the same can be
+written as:
+
+```vim
+" If installed using Homebrew
+Plug '/usr/local/opt/fzf'
+
+" If installed using Homebrew on Apple Silicon
+Plug '/opt/homebrew/opt/fzf'
+
+" If you have cloned fzf on ~/.fzf directory
+Plug '~/.fzf'
+```
+
+But if you want the latest Vim plugin file from GitHub rather than the one
+included in the package, write:
+
+```vim
+Plug 'junegunn/fzf'
+```
+
+The Vim plugin will pick up fzf binary available on the system. If fzf is not
+found on `$PATH`, it will ask you if it should download the latest binary for
+you.
+
+To make sure that you have the latest version of the binary, set up
+post-update hook like so:
+
+```vim
+Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
+```
+
+Summary
+-------
+
+The Vim plugin of fzf provides two core functions, and `:FZF` command which is
+the basic file selector command built on top of them.
+
+1. **`fzf#run([spec dict])`**
+    - Starts fzf inside Vim with the given spec
+    - `:call fzf#run({'source': 'ls'})`
+2. **`fzf#wrap([spec dict]) -> (dict)`**
+    - Takes a spec for `fzf#run` and returns an extended version of it with
+      additional options for addressing global preferences (`g:fzf_xxx`)
+        - `:echo fzf#wrap({'source': 'ls'})`
+    - We usually *wrap* a spec with `fzf#wrap` before passing it to `fzf#run`
+        - `:call fzf#run(fzf#wrap({'source': 'ls'}))`
+3. **`:FZF [fzf_options string] [path string]`**
+    - Basic fuzzy file selector
+    - A reference implementation for those who don't want to write VimScript
+      to implement custom commands
+    - If you're looking for more such commands, check out [fzf.vim](https://github.com/junegunn/fzf.vim) project.
+
+The most important of all is `fzf#run`, but it would be easier to understand
+the whole if we start off with `:FZF` command.
+
+`:FZF[!]`
+---------
+
+```vim
+" Look for files under current directory
+:FZF
+
+" Look for files under your home directory
+:FZF ~
+
+" With fzf command-line options
+:FZF --reverse --info=inline /tmp
+
+" Bang version starts fzf in fullscreen mode
+:FZF!
+```
+
+Similarly to [ctrlp.vim](https://github.com/kien/ctrlp.vim), use enter key,
+`CTRL-T`, `CTRL-X` or `CTRL-V` to open selected files in the current window,
+in new tabs, in horizontal splits, or in vertical splits respectively.
+
+Note that the environment variables `FZF_DEFAULT_COMMAND` and
+`FZF_DEFAULT_OPTS` also apply here.
+
+### Configuration
+
+- `g:fzf_action`
+    - Customizable extra key bindings for opening selected files in different ways
+- `g:fzf_layout`
+    - Determines the size and position of fzf window
+- `g:fzf_colors`
+    - Customizes fzf colors to match the current color scheme
+- `g:fzf_history_dir`
+    - Enables history feature
+
+#### Examples
+
+```vim
+" This is the default extra key bindings
+let g:fzf_action = {
+  \ 'ctrl-t': 'tab split',
+  \ 'ctrl-x': 'split',
+  \ 'ctrl-v': 'vsplit' }
+
+" An action can be a reference to a function that processes selected lines
+function! s:build_quickfix_list(lines)
+  call setqflist(map(copy(a:lines), '{ "filename": v:val, "lnum": 1 }'))
+  copen
+  cc
+endfunction
+
+let g:fzf_action = {
+  \ 'ctrl-q': function('s:build_quickfix_list'),
+  \ 'ctrl-t': 'tab split',
+  \ 'ctrl-x': 'split',
+  \ 'ctrl-v': 'vsplit' }
+
+" Default fzf layout
+" - Popup window (center of the screen)
+let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+
+" - Popup window (center of the current window)
+let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6, 'relative': v:true } }
+
+" - Popup window (anchored to the bottom of the current window)
+let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6, 'relative': v:true, 'yoffset': 1.0 } }
+
+" - down / up / left / right
+let g:fzf_layout = { 'down': '40%' }
+
+" - Window using a Vim command
+let g:fzf_layout = { 'window': 'enew' }
+let g:fzf_layout = { 'window': '-tabnew' }
+let g:fzf_layout = { 'window': '10new' }
+
+" Customize fzf colors to match your color scheme
+" - fzf#wrap translates this to a set of `--color` options
+let g:fzf_colors =
+\ { 'fg':      ['fg', 'Normal'],
+  \ 'bg':      ['bg', 'Normal'],
+  \ 'query':   ['fg', 'Normal'],
+  \ 'hl':      ['fg', 'Comment'],
+  \ 'fg+':     ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
+  \ 'bg+':     ['bg', 'CursorLine', 'CursorColumn'],
+  \ 'hl+':     ['fg', 'Statement'],
+  \ 'info':    ['fg', 'PreProc'],
+  \ 'border':  ['fg', 'Ignore'],
+  \ 'prompt':  ['fg', 'Conditional'],
+  \ 'pointer': ['fg', 'Exception'],
+  \ 'marker':  ['fg', 'Keyword'],
+  \ 'spinner': ['fg', 'Label'],
+  \ 'header':  ['fg', 'Comment'] }
+
+" Enable per-command history
+" - History files will be stored in the specified directory
+" - When set, CTRL-N and CTRL-P will be bound to 'next-history' and
+"   'previous-history' instead of 'down' and 'up'.
+let g:fzf_history_dir = '~/.local/share/fzf-history'
+```
+
+##### Explanation of `g:fzf_colors`
+
+`g:fzf_colors` is a dictionary mapping fzf elements to a color specification
+list:
+
+    element: [ component, group1 [, group2, ...] ]
+
+- `element` is an fzf element to apply a color to:
+
+  | Element                     | Description                                           |
+  | ---                         | ---                                                   |
+  | `fg`  / `bg`  / `hl`        | Item (foreground / background / highlight)            |
+  | `fg+` / `bg+` / `hl+`       | Current item (foreground / background / highlight)    |
+  | `preview-fg` / `preview-bg` | Preview window text and background                    |
+  | `hl`  / `hl+`               | Highlighted substrings (normal / current)             |
+  | `gutter`                    | Background of the gutter on the left                  |
+  | `pointer`                   | Pointer to the current line (`>`)                     |
+  | `marker`                    | Multi-select marker (`>`)                             |
+  | `border`                    | Border around the window (`--border` and `--preview`) |
+  | `header`                    | Header (`--header` or `--header-lines`)               |
+  | `info`                      | Info line (match counters)                            |
+  | `spinner`                   | Streaming input indicator                             |
+  | `query`                     | Query string                                          |
+  | `disabled`                  | Query string when search is disabled                  |
+  | `prompt`                    | Prompt before query (`> `)                            |
+  | `pointer`                   | Pointer to the current line (`>`)                     |
+
+- `component` specifies the component (`fg` / `bg`) from which to extract the
+  color when considering each of the following highlight groups
+
+- `group1 [, group2, ...]` is a list of highlight groups that are searched (in
+  order) for a matching color definition
+
+For example, consider the following specification:
+
+```vim
+  'prompt':  ['fg', 'Conditional', 'Comment'],
+```
+
+This means we color the **prompt**
+- using the `fg` attribute of the `Conditional` if it exists,
+- otherwise use the `fg` attribute of the `Comment` highlight group if it exists,
+- otherwise fall back to the default color settings for the **prompt**.
+
+You can examine the color option generated according the setting by printing
+the result of `fzf#wrap()` function like so:
+
+```vim
+:echo fzf#wrap()
+```
+
+`fzf#run`
+---------
+
+`fzf#run()` function is the core of Vim integration. It takes a single
+dictionary argument, *a spec*, and starts fzf process accordingly. At the very
+least, specify `sink` option to tell what it should do with the selected
+entry.
+
+```vim
+call fzf#run({'sink': 'e'})
+```
+
+We haven't specified the `source`, so this is equivalent to starting fzf on
+command line without standard input pipe; fzf will traverse the file system
+under the current directory to get the list of files. (If
+`$FZF_DEFAULT_COMMAND` is set, fzf will use the output of the command
+instead.) When you select one, it will open it with the sink, `:e` command. If
+you want to open it in a new tab, you can pass `:tabedit` command instead as
+the sink.
+
+```vim
+call fzf#run({'sink': 'tabedit'})
+```
+
+You can use any shell command as the source to generate the list. The
+following example will list the files managed by git. It's equivalent to
+running `git ls-files | fzf` on shell.
+
+```vim
+call fzf#run({'source': 'git ls-files', 'sink': 'e'})
+```
+
+fzf options can be specified as `options` entry in spec dictionary.
+
+```vim
+call fzf#run({'sink': 'tabedit', 'options': '--multi --reverse'})
+```
+
+You can also pass a layout option if you don't want fzf window to take up the
+entire screen.
+
+```vim
+" up / down / left / right / window are allowed
+call fzf#run({'source': 'git ls-files', 'sink': 'e', 'left': '40%'})
+call fzf#run({'source': 'git ls-files', 'sink': 'e', 'window': '30vnew'})
+```
+
+`source` doesn't have to be an external shell command, you can pass a Vim
+array as the source. In the next example, we pass the names of color
+schemes as the source to implement a color scheme selector.
+
+```vim
+call fzf#run({'source': map(split(globpath(&rtp, 'colors/*.vim')),
+            \               'fnamemodify(v:val, ":t:r")'),
+            \ 'sink': 'colo', 'left': '25%'})
+```
+
+The following table summarizes the available options.
+
+| Option name                | Type          | Description                                                           |
+| -------------------------- | ------------- | ----------------------------------------------------------------      |
+| `source`                   | string        | External command to generate input to fzf (e.g. `find .`)             |
+| `source`                   | list          | Vim list as input to fzf                                              |
+| `sink`                     | string        | Vim command to handle the selected item (e.g. `e`, `tabe`)            |
+| `sink`                     | funcref       | Function to be called with each selected item                         |
+| `sinklist` (or `sink*`)    | funcref       | Similar to `sink`, but takes the list of output lines at once         |
+| `exit`                     | funcref       | Function to be called with the exit status of fzf (e.g. 0, 1, 2, 130) |
+| `options`                  | string/list   | Options to fzf                                                        |
+| `dir`                      | string        | Working directory                                                     |
+| `up`/`down`/`left`/`right` | number/string | (Layout) Window position and size (e.g. `20`, `50%`)                  |
+| `tmux`                     | string        | (Layout) `--tmux` options (e.g. `90%,70%`)                            |
+| `window` (Vim 8 / Neovim)  | string        | (Layout) Command to open fzf window (e.g. `vertical aboveleft 30new`) |
+| `window` (Vim 8 / Neovim)  | dict          | (Layout) Popup window settings (e.g. `{'width': 0.9, 'height': 0.6}`) |
+
+`options` entry can be either a string or a list. For simple cases, string
+should suffice, but prefer to use list type to avoid escaping issues.
+
+```vim
+call fzf#run({'options': '--reverse --prompt "C:\\Program Files\\"'})
+call fzf#run({'options': ['--reverse', '--prompt', 'C:\Program Files\']})
+```
+
+When `window` entry is a dictionary, fzf will start in a popup window. The
+following options are allowed:
+
+- Required:
+    - `width` [float range [0 ~ 1]] or [integer range [8 ~ ]]
+    - `height` [float range [0 ~ 1]] or [integer range [4 ~ ]]
+- Optional:
+    - `yoffset` [float default 0.5 range [0 ~ 1]]
+    - `xoffset` [float default 0.5 range [0 ~ 1]]
+    - `relative` [boolean default v:false]
+    - `border` [string default `rounded` (`sharp` on Windows)]: Border style
+        - `rounded` / `sharp` / `horizontal` / `vertical` / `top` / `bottom` / `left` / `right` / `no[ne]`
+
+`fzf#wrap`
+----------
+
+We have seen that several aspects of `:FZF` command can be configured with
+a set of global option variables; different ways to open files
+(`g:fzf_action`), window position and size (`g:fzf_layout`), color palette
+(`g:fzf_colors`), etc.
+
+So how can we make our custom `fzf#run` calls also respect those variables?
+Simply by *"wrapping"* the spec dictionary with `fzf#wrap` before passing it
+to `fzf#run`.
+
+- **`fzf#wrap([name string], [spec dict], [fullscreen bool]) -> (dict)`**
+    - All arguments are optional. Usually we only need to pass a spec dictionary.
+    - `name` is for managing history files. It is ignored if
+      `g:fzf_history_dir` is not defined.
+    - `fullscreen` can be either `0` or `1` (default: 0).
+
+`fzf#wrap` takes a spec and returns an extended version of it (also
+a dictionary) with additional options for addressing global preferences. You
+can examine the return value of it like so:
+
+```vim
+echo fzf#wrap({'source': 'ls'})
+```
+
+After we *"wrap"* our spec, we pass it to `fzf#run`.
+
+```vim
+call fzf#run(fzf#wrap({'source': 'ls'}))
+```
+
+Now it supports `CTRL-T`, `CTRL-V`, and `CTRL-X` key bindings (configurable
+via `g:fzf_action`) and it opens fzf window according to `g:fzf_layout`
+setting.
+
+To make it easier to use, let's define `LS` command.
+
+```vim
+command! LS call fzf#run(fzf#wrap({'source': 'ls'}))
+```
+
+Type `:LS` and see how it works.
+
+We would like to make `:LS!` (bang version) open fzf in fullscreen, just like
+`:FZF!`. Add `-bang` to command definition, and use `<bang>` value to set
+the last `fullscreen` argument of `fzf#wrap` (see `:help <bang>`).
+
+```vim
+" On :LS!, <bang> evaluates to '!', and '!0' becomes 1
+command! -bang LS call fzf#run(fzf#wrap({'source': 'ls'}, <bang>0))
+```
+
+Our `:LS` command will be much more useful if we can pass a directory argument
+to it, so that something like `:LS /tmp` is possible.
+
+```vim
+command! -bang -complete=dir -nargs=? LS
+    \ call fzf#run(fzf#wrap({'source': 'ls', 'dir': <q-args>}, <bang>0))
+```
+
+Lastly, if you have enabled `g:fzf_history_dir`, you might want to assign
+a unique name to our command and pass it as the first argument to `fzf#wrap`.
+
+```vim
+" The query history for this command will be stored as 'ls' inside g:fzf_history_dir.
+" The name is ignored if g:fzf_history_dir is not defined.
+command! -bang -complete=dir -nargs=? LS
+    \ call fzf#run(fzf#wrap('ls', {'source': 'ls', 'dir': <q-args>}, <bang>0))
+```
+
+### Global options supported by `fzf#wrap`
+
+- `g:fzf_layout`
+- `g:fzf_action`
+    - **Works only when no custom `sink` (or `sinklist`) is provided**
+        - Having custom sink usually means that each entry is not an ordinary
+          file path (e.g. name of color scheme), so we can't blindly apply the
+          same strategy (i.e. `tabedit some-color-scheme` doesn't make sense)
+- `g:fzf_colors`
+- `g:fzf_history_dir`
+
+Tips
+----
+
+### fzf inside terminal buffer
+
+On the latest versions of Vim and Neovim, fzf will start in a terminal buffer.
+If you find the default ANSI colors to be different, consider configuring the
+colors using `g:terminal_ansi_colors` in regular Vim or `g:terminal_color_x`
+in Neovim.
+
+```vim
+" Terminal colors for seoul256 color scheme
+if has('nvim')
+  let g:terminal_color_0 = '#4e4e4e'
+  let g:terminal_color_1 = '#d68787'
+  let g:terminal_color_2 = '#5f865f'
+  let g:terminal_color_3 = '#d8af5f'
+  let g:terminal_color_4 = '#85add4'
+  let g:terminal_color_5 = '#d7afaf'
+  let g:terminal_color_6 = '#87afaf'
+  let g:terminal_color_7 = '#d0d0d0'
+  let g:terminal_color_8 = '#626262'
+  let g:terminal_color_9 = '#d75f87'
+  let g:terminal_color_10 = '#87af87'
+  let g:terminal_color_11 = '#ffd787'
+  let g:terminal_color_12 = '#add4fb'
+  let g:terminal_color_13 = '#ffafaf'
+  let g:terminal_color_14 = '#87d7d7'
+  let g:terminal_color_15 = '#e4e4e4'
+else
+  let g:terminal_ansi_colors = [
+    \ '#4e4e4e', '#d68787', '#5f865f', '#d8af5f',
+    \ '#85add4', '#d7afaf', '#87afaf', '#d0d0d0',
+    \ '#626262', '#d75f87', '#87af87', '#ffd787',
+    \ '#add4fb', '#ffafaf', '#87d7d7', '#e4e4e4'
+  \ ]
+endif
+```
+
+### Starting fzf in a popup window
+
+```vim
+" Required:
+" - width [float range [0 ~ 1]] or [integer range [8 ~ ]]
+" - height [float range [0 ~ 1]] or [integer range [4 ~ ]]
+"
+" Optional:
+" - xoffset [float default 0.5 range [0 ~ 1]]
+" - yoffset [float default 0.5 range [0 ~ 1]]
+" - relative [boolean default v:false]
+" - border [string default 'rounded']: Border style
+"   - 'rounded' / 'sharp' / 'horizontal' / 'vertical' / 'top' / 'bottom' / 'left' / 'right'
+let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+```
+
+Alternatively, you can make fzf open in a tmux popup window (requires tmux 3.2
+or above) by putting `--tmux` option value in `tmux` key.
+
+```vim
+" See `--tmux` option in `man fzf` for available options
+" [center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]
+if exists('$TMUX')
+  let g:fzf_layout = { 'tmux': '90%,70%' }
+else
+  let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+endif
+```
+
+### Hide statusline
+
+When fzf starts in a terminal buffer, the file type of the buffer is set to
+`fzf`. So you can set up `FileType fzf` autocmd to customize the settings of
+the window.
+
+For example, if you open fzf on the bottom on the screen (e.g. `{'down':
+'40%'}`), you might want to temporarily disable the statusline for a cleaner
+look.
+
+```vim
+let g:fzf_layout = { 'down': '30%' }
+autocmd! FileType fzf
+autocmd  FileType fzf set laststatus=0 noshowmode noruler
+  \| autocmd BufLeave <buffer> set laststatus=2 showmode ruler
+```
+
+[License](LICENSE)
+------------------
+
+The MIT License (MIT)
+
+Copyright (c) 2013-2024 Junegunn Choi

bin/fzf-preview.sh

@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+#
+# The purpose of this script is to demonstrate how to preview a file or an
+# image in the preview window of fzf.
+#
+# Dependencies:
+# - https://github.com/sharkdp/bat
+# - https://github.com/hpjansson/chafa
+# - https://iterm2.com/utilities/imgcat
+
+if [[ $# -ne 1 ]]; then
+  >&2 echo "usage: $0 FILENAME[:LINENO][:IGNORED]"
+  exit 1
+fi
+
+file=${1/#\~\//$HOME/}
+
+center=0
+if [[ ! -r $file ]]; then
+  if [[ $file =~ ^(.+):([0-9]+)\ *$ ]] && [[ -r ${BASH_REMATCH[1]} ]]; then
+    file=${BASH_REMATCH[1]}
+    center=${BASH_REMATCH[2]}
+  elif [[ $file =~ ^(.+):([0-9]+):[0-9]+\ *$ ]] && [[ -r ${BASH_REMATCH[1]} ]]; then
+    file=${BASH_REMATCH[1]}
+    center=${BASH_REMATCH[2]}
+  fi
+fi
+
+type=$(file --brief --dereference --mime -- "$file")
+
+if [[ ! $type =~ image/ ]]; then
+  if [[ $type =~ =binary ]]; then
+    file "$1"
+    exit
+  fi
+
+  # Sometimes bat is installed as batcat.
+  if command -v batcat > /dev/null; then
+    batname="batcat"
+  elif command -v bat > /dev/null; then
+    batname="bat"
+  else
+    cat "$1"
+    exit
+  fi
+
+  ${batname} --style="${BAT_STYLE:-numbers}" --color=always --pager=never --highlight-line="${center:-0}" -- "$file"
+  exit
+fi
+
+dim=${FZF_PREVIEW_COLUMNS}x${FZF_PREVIEW_LINES}
+if [[ $dim = x ]]; then
+  dim=$(stty size < /dev/tty | awk '{print $2 "x" $1}')
+elif ! [[ $KITTY_WINDOW_ID ]] && (( FZF_PREVIEW_TOP + FZF_PREVIEW_LINES == $(stty size < /dev/tty | awk '{print $1}') )); then
+  # Avoid scrolling issue when the Sixel image touches the bottom of the screen
+  # * https://github.com/junegunn/fzf/issues/2544
+  dim=${FZF_PREVIEW_COLUMNS}x$((FZF_PREVIEW_LINES - 1))
+fi
+
+# 1. Use icat (from Kitty) if kitten is installed
+if [[ $KITTY_WINDOW_ID ]] || [[ $GHOSTTY_RESOURCES_DIR ]] && command -v kitten > /dev/null; then
+  # 1. 'memory' is the fastest option but if you want the image to be scrollable,
+  #    you have to use 'stream'.
+  #
+  # 2. The last line of the output is the ANSI reset code without newline.
+  #    This confuses fzf and makes it render scroll offset indicator.
+  #    So we remove the last line and append the reset code to its previous line.
+  kitten icat --clear --transfer-mode=memory --unicode-placeholder --stdin=no --place="$dim@0x0" "$file" | sed '$d' | sed $'$s/$/\e[m/'
+
+# 2. Use chafa with Sixel output
+elif command -v chafa > /dev/null; then
+  chafa -s "$dim" "$file"
+  # Add a new line character so that fzf can display multiple images in the preview window
+  echo
+
+# 3. If chafa is not found but imgcat is available, use it on iTerm2
+elif command -v imgcat > /dev/null; then
+  # NOTE: We should use https://iterm2.com/utilities/it2check to check if the
+  # user is running iTerm2. But for the sake of simplicity, we just assume
+  # that's the case here.
+  imgcat -W "${dim%%x*}" -H "${dim##*x}" "$file"
+
+# 4. Cannot find any suitable method to preview the image
+else
+  file "$file"
+fi

bin/fzf-tmux

@@ -1,13 +1,13 @@
 #!/usr/bin/env bash
 # fzf-tmux: starts fzf in a tmux pane
-# usage: fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
+# usage: fzf-tmux [LAYOUT OPTIONS] [--] [FZF OPTIONS]
 
 fail() {
   >&2 echo "$1"
   exit 2
 }
 
-fzf="$(command -v fzf 2> /dev/null)" || fzf="$(dirname "$0")/fzf"
+fzf="$(command which fzf)" || fzf="$(dirname "$0")/fzf"
 [[ -x "$fzf" ]] || fail 'fzf executable not found'
 
 args=()
@@ -16,19 +16,30 @@ skip=""
 swap=""
 close=""
 term=""
-[[ -n "$LINES" ]] && lines=$LINES || lines=$(tput lines)
-[[ -n "$COLUMNS" ]] && columns=$COLUMNS || columns=$(tput cols)
+[[ -n "$LINES" ]] && lines=$LINES || lines=$(tput lines) || lines=$(tmux display-message -p "#{pane_height}")
+[[ -n "$COLUMNS" ]] && columns=$COLUMNS || columns=$(tput cols) || columns=$(tmux display-message -p "#{pane_width}")
+
+tmux_version=$(tmux -V | sed 's/[^0-9.]//g')
+tmux_32=$(awk '{print ($1 >= 3.2)}' <<< "$tmux_version" 2> /dev/null || bc -l <<< "$tmux_version >= 3.2")
 
 help() {
-  >&2 echo 'usage: fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
+  >&2 echo 'usage: fzf-tmux [LAYOUT OPTIONS] [--] [FZF OPTIONS]
 
-  Layout
-    -u [HEIGHT[%]]  Split above (up)
-    -d [HEIGHT[%]]  Split below (down)
-    -l [WIDTH[%]]   Split left
-    -r [WIDTH[%]]   Split right
+  LAYOUT OPTIONS:
+    (default layout: -d 50%)
 
-    (default: -d 50%)
+    Popup window (requires tmux 3.2 or above):
+      -p [WIDTH[%][,HEIGHT[%]]]  (default: 50%)
+      -w WIDTH[%]
+      -h HEIGHT[%]
+      -x COL
+      -y ROW
+
+    Split pane:
+      -u [HEIGHT[%]]             Split above (up)
+      -d [HEIGHT[%]]             Split below (down)
+      -l [WIDTH[%]]              Split left
+      -r [WIDTH[%]]              Split right
 '
   exit
 }
@@ -47,8 +58,10 @@ while [[ $# -gt 0 ]]; do
       echo "fzf-tmux (with fzf $("$fzf" --version))"
       exit
       ;;
-    -w*|-h*|-d*|-u*|-r*|-l*)
-      if [[ "$arg" =~ ^.[lrw] ]]; then
+    -p*|-w*|-h*|-x*|-y*|-d*|-u*|-r*|-l*)
+      if [[ "$arg" =~ ^-[pwhxy] ]]; then
+        [[ "$opt" =~ "-E" ]] || opt="-E"
+      elif [[ "$arg" =~ ^.[lr] ]]; then
         opt="-h"
         if [[ "$arg" =~ ^.l ]]; then
           opt="$opt -d"
@@ -66,7 +79,7 @@ while [[ $# -gt 0 ]]; do
       if [[ ${#arg} -gt 2 ]]; then
         size="${arg:2}"
       else
-        if [[ "$1" =~ ^[0-9]+%?$ ]]; then
+        if [[ "$1" =~ ^[0-9%,]+$ ]] || [[ "$1" =~ ^[A-Z]$ ]]; then
           size="$1"
           shift
         else
@@ -74,12 +87,28 @@ while [[ $# -gt 0 ]]; do
         fi
       fi
 
-      if [[ "$size" =~ %$ ]]; then
+      if [[ "$arg" =~ ^-p ]]; then
+        if [[ -n "$size" ]]; then
+          w=${size%%,*}
+          h=${size##*,}
+          opt="$opt -w$w -h$h"
+        fi
+      elif [[ "$arg" =~ ^-[whxy] ]]; then
+        opt="$opt ${arg:0:2}$size"
+      elif [[ "$size" =~ %$ ]]; then
         size=${size:0:((${#size}-1))}
-        if [[ -n "$swap" ]]; then
-          opt="$opt -p $(( 100 - size ))"
+        if [[ $tmux_32 = 1 ]]; then
+          if [[ -n "$swap" ]]; then
+            opt="$opt -l $(( 100 - size ))%"
+          else
+            opt="$opt -l $size%"
+          fi
         else
-          opt="$opt -p $size"
+          if [[ -n "$swap" ]]; then
+            opt="$opt -p $(( 100 - size ))"
+          else
+            opt="$opt -p $size"
+          fi
         fi
       else
         if [[ -n "$swap" ]]; then
@@ -109,19 +138,21 @@ while [[ $# -gt 0 ]]; do
   [[ -n "$skip" ]] && args+=("$arg")
 done
 
-if [[ -z "$TMUX" || "$opt" =~ ^-h && "$columns" -le 40 || ! "$opt" =~ ^-h && "$lines" -le 15 ]]; then
+if [[ -z "$TMUX" ]]; then
   "$fzf" "${args[@]}"
   exit $?
 fi
 
-# --height option is not allowed
-args+=("--no-height")
+# * --height option is not allowed
+# * CTRL-Z is also disabled
+# * fzf-tmux script is not compatible with --tmux option in fzf 0.53.0 or later
+args=("${args[@]}" "--no-height" "--bind=ctrl-z:ignore" "--no-tmux")
 
-# Handle zoomed tmux pane by moving it to a temp window
-if tmux list-panes -F '#F' | grep -q Z; then
-  zoomed=1
+# Handle zoomed tmux pane without popup options by moving it to a temp window
+if [[ ! "$opt" =~ "-E" ]] && tmux list-panes -F '#F' | grep -q Z; then
+  zoomed_without_popup=1
   original_window=$(tmux display-message -p "#{window_id}")
-  tmp_window=$(tmux new-window -d -P -F "#{window_id}" "bash -c 'while :; do for c in \\| / - \\\\; do sleep 0.2; printf \"\\r\$c fzf-tmux is running\\r\"; done; done'")
+  tmp_window=$(tmux new-window -d -P -F "#{window_id}" "bash -c 'while :; do for c in \\| / - '\\;' do sleep 0.2; printf \"\\r\$c fzf-tmux is running\\r\"; done; done'")
   tmux swap-pane -t $tmp_window \; select-window -t $tmp_window
 fi
 
@@ -133,51 +164,91 @@ argsf="${TMPDIR:-/tmp}/fzf-args-$id"
 fifo1="${TMPDIR:-/tmp}/fzf-fifo1-$id"
 fifo2="${TMPDIR:-/tmp}/fzf-fifo2-$id"
 fifo3="${TMPDIR:-/tmp}/fzf-fifo3-$id"
+if tmux_win_opts=$(tmux show-options -p remain-on-exit \; show-options -p synchronize-panes 2> /dev/null); then
+  tmux_win_opts=( $(sed '/ off/d; s/synchronize-panes/set-option -p synchronize-panes/; s/remain-on-exit/set-option -p remain-on-exit/; s/$/ \\;/' <<< "$tmux_win_opts") )
+  tmux_off_opts='; set-option -p synchronize-panes off ; set-option -p remain-on-exit off'
+else
+  tmux_win_opts=( $(tmux show-window-options remain-on-exit \; show-window-options synchronize-panes | sed '/ off/d; s/^/set-window-option /; s/$/ \\;/') )
+  tmux_off_opts='; set-window-option synchronize-panes off ; set-window-option remain-on-exit off'
+fi
 cleanup() {
-  rm -f $argsf $fifo1 $fifo2 $fifo3
+  \rm -f $argsf $fifo1 $fifo2 $fifo3
 
-  # Remove temp window if we were zoomed
-  if [[ -n "$zoomed" ]]; then
+  # Restore tmux window options
+  if [[ "${#tmux_win_opts[@]}" -gt 1 ]]; then
+    eval "tmux ${tmux_win_opts[*]}"
+  fi
+
+  # Remove temp window if we were zoomed without popup options
+  if [[ -n "$zoomed_without_popup" ]]; then
+    tmux display-message -p "#{window_id}" > /dev/null
     tmux swap-pane -t $original_window \; \
       select-window -t $original_window \; \
       kill-window -t $tmp_window \; \
       resize-pane -Z
   fi
+
+  if [[ $# -gt 0 ]]; then
+    trap - EXIT
+    exit 130
+  fi
 }
-trap cleanup EXIT SIGINT SIGTERM
+trap 'cleanup 1' SIGUSR1
+trap 'cleanup' EXIT
 
-envs="env TERM=$TERM "
-[[ -n "$FZF_DEFAULT_OPTS"    ]] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
-[[ -n "$FZF_DEFAULT_COMMAND" ]] && envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"
-
-mkfifo -m o+w $fifo2
-mkfifo -m o+w $fifo3
+envs="export TERM=$TERM "
+if [[ "$opt" =~ "-E" ]]; then
+  if [[ $tmux_version = 3.2 ]]; then
+    FZF_DEFAULT_OPTS="--margin 0,1 $FZF_DEFAULT_OPTS"
+  elif [[ $tmux_32 = 1 ]]; then
+    FZF_DEFAULT_OPTS="--border $FZF_DEFAULT_OPTS"
+    opt="-B $opt"
+  else
+    echo "fzf-tmux: tmux 3.2 or above is required for popup mode" >&2
+    exit 2
+  fi
+fi
+envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"
+envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
+envs="$envs FZF_DEFAULT_OPTS_FILE=$(printf %q "$FZF_DEFAULT_OPTS_FILE")"
+[[ -n "$RUNEWIDTH_EASTASIAN" ]] && envs="$envs RUNEWIDTH_EASTASIAN=$(printf %q "$RUNEWIDTH_EASTASIAN")"
+[[ -n "$BAT_THEME" ]] && envs="$envs BAT_THEME=$(printf %q "$BAT_THEME")"
+echo "$envs;" > "$argsf"
 
 # Build arguments to fzf
-opts=""
-for arg in "${args[@]}"; do
-  arg="${arg//\\/\\\\}"
-  arg="${arg//\"/\\\"}"
-  arg="${arg//\`/\\\`}"
-  arg="${arg//$/\\$}"
-  opts="$opts \"$arg\""
-done
+opts=$(printf "%q " "${args[@]}")
 
+pppid=$$
+echo -n "trap 'kill -SIGUSR1 -$pppid' EXIT SIGINT SIGTERM;" >> $argsf
+close="; trap - EXIT SIGINT SIGTERM $close"
+
+export TMUX=$(cut -d , -f 1,2 <<< "$TMUX")
+mkfifo -m o+w $fifo2
+if [[ "$opt" =~ "-E" ]]; then
+  cat $fifo2 &
+  if [[ -n "$term" ]] || [[ -t 0 ]]; then
+    cat <<< "\"$fzf\" $opts > $fifo2; out=\$? $close; exit \$out" >> $argsf
+  else
+    mkfifo $fifo1
+    cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; out=\$? $close; exit \$out" >> $argsf
+    cat <&0 > $fifo1 &
+  fi
+
+  tmux popup -d "$PWD" $opt "bash $argsf" > /dev/null 2>&1
+  exit $?
+fi
+
+mkfifo -m o+w $fifo3
 if [[ -n "$term" ]] || [[ -t 0 ]]; then
-  cat <<< "\"$fzf\" $opts > $fifo2; echo \$? > $fifo3 $close" > $argsf
-  TMUX=$(echo $TMUX | cut -d , -f 1,2) tmux set-window-option synchronize-panes off \;\
-    set-window-option remain-on-exit off \;\
-    split-window $opt "cd $(printf %q "$PWD");$envs bash $argsf" $swap \
-    > /dev/null 2>&1
+  cat <<< "\"$fzf\" $opts > $fifo2; echo \$? > $fifo3 $close" >> $argsf
 else
   mkfifo $fifo1
-  cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" > $argsf
-  TMUX=$(echo $TMUX | cut -d , -f 1,2) tmux set-window-option synchronize-panes off \;\
-    set-window-option remain-on-exit off \;\
-    split-window $opt "$envs bash $argsf" $swap \
-    > /dev/null 2>&1
+  cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" >> $argsf
   cat <&0 > $fifo1 &
 fi
+tmux \
+  split-window -c "$PWD" $opt "bash -c 'exec -a fzf bash $argsf'" $swap \
+  $tmux_off_opts \
+  > /dev/null 2>&1 || { "$fzf" "${args[@]}"; exit $?; }
 cat $fifo2
 exit "$(cat $fifo3)"
-

doc/fzf.txt

@@ -0,0 +1,509 @@
+fzf.txt	fzf	Last change: February 15 2024
+FZF - TABLE OF CONTENTS                                            *fzf* *fzf-toc*
+==============================================================================
+
+  FZF Vim integration                       |fzf-vim-integration|
+    Installation                            |fzf-installation|
+    Summary                                 |fzf-summary|
+    :FZF[!]                                 |:FZF|
+      Configuration                         |fzf-configuration|
+        Examples                            |fzf-examples|
+          Explanation of g:fzf_colors       |fzf-explanation-of-gfzfcolors|
+    fzf#run                                 |fzf#run|
+    fzf#wrap                                |fzf#wrap|
+      Global options supported by fzf#wrap  |fzf-global-options-supported-by-fzf#wrap|
+    Tips                                    |fzf-tips|
+      fzf inside terminal buffer            |fzf-inside-terminal-buffer|
+      Starting fzf in a popup window        |fzf-starting-fzf-in-a-popup-window|
+      Hide statusline                       |fzf-hide-statusline|
+    License                                 |fzf-license|
+
+FZF VIM INTEGRATION                                        *fzf-vim-integration*
+==============================================================================
+
+
+INSTALLATION                                                  *fzf-installation*
+==============================================================================
+
+Once you have fzf installed, you can enable it inside Vim simply by adding the
+directory to 'runtimepath' in your Vim configuration file. The path may differ
+depending on the package manager.
+>
+    " If installed using Homebrew
+    set rtp+=/usr/local/opt/fzf
+
+    " If installed using Homebrew on Apple Silicon
+    set rtp+=/opt/homebrew/opt/fzf
+
+    " If you have cloned fzf on ~/.fzf directory
+    set rtp+=~/.fzf
+<
+If you use {vim-plug}{1}, the same can be written as:
+>
+    " If installed using Homebrew
+    Plug '/usr/local/opt/fzf'
+
+    " If installed using Homebrew on Apple Silicon
+    Plug '/opt/homebrew/opt/fzf'
+
+    " If you have cloned fzf on ~/.fzf directory
+    Plug '~/.fzf'
+<
+But if you want the latest Vim plugin file from GitHub rather than the one
+included in the package, write:
+>
+    Plug 'junegunn/fzf'
+<
+The Vim plugin will pick up fzf binary available on the system. If fzf is not
+found on `$PATH`, it will ask you if it should download the latest binary for
+you.
+
+To make sure that you have the latest version of the binary, set up
+post-update hook like so:
+
+                                                                   *fzf#install*
+>
+    Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
+<
+                                      {1} https://github.com/junegunn/vim-plug
+
+
+SUMMARY                                                            *fzf-summary*
+==============================================================================
+
+The Vim plugin of fzf provides two core functions, and `:FZF` command which is
+the basic file selector command built on top of them.
+
+ 1. `fzf#run([spec dict])`
+   - Starts fzf inside Vim with the given spec
+   - `:call fzf#run({'source': 'ls'})`
+ 2. `fzf#wrap([spec dict]) -> (dict)`
+   - Takes a spec for `fzf#run` and returns an extended version of it with
+     additional options for addressing global preferences (`g:fzf_xxx`)
+     - `:echo fzf#wrap({'source': 'ls'})`
+   - We usually wrap a spec with `fzf#wrap` before passing it to `fzf#run`
+     - `:call fzf#run(fzf#wrap({'source': 'ls'}))`
+ 3. `:FZF [fzf_options string] [path string]`
+   - Basic fuzzy file selector
+   - A reference implementation for those who don't want to write VimScript to
+     implement custom commands
+   - If you're looking for more such commands, check out {fzf.vim}{2} project.
+
+The most important of all is `fzf#run`, but it would be easier to understand
+the whole if we start off with `:FZF` command.
+
+                                       {2} https://github.com/junegunn/fzf.vim
+
+
+:FZF[!]
+==============================================================================
+
+                                                                          *:FZF*
+>
+    " Look for files under current directory
+    :FZF
+
+    " Look for files under your home directory
+    :FZF ~
+
+    " With fzf command-line options
+    :FZF --reverse --info=inline /tmp
+
+    " Bang version starts fzf in fullscreen mode
+    :FZF!
+<
+Similarly to {ctrlp.vim}{3}, use enter key, CTRL-T, CTRL-X or CTRL-V to open
+selected files in the current window, in new tabs, in horizontal splits, or in
+vertical splits respectively.
+
+Note that the environment variables `FZF_DEFAULT_COMMAND` and
+`FZF_DEFAULT_OPTS` also apply here.
+
+                                         {3} https://github.com/kien/ctrlp.vim
+
+
+< Configuration >_____________________________________________________________~
+                                                             *fzf-configuration*
+
+                      *g:fzf_action* *g:fzf_layout* *g:fzf_colors* *g:fzf_history_dir*
+
+ - `g:fzf_action`
+   - Customizable extra key bindings for opening selected files in different
+     ways
+ - `g:fzf_layout`
+   - Determines the size and position of fzf window
+ - `g:fzf_colors`
+   - Customizes fzf colors to match the current color scheme
+ - `g:fzf_history_dir`
+   - Enables history feature
+
+
+Examples~
+                                                                  *fzf-examples*
+>
+    " This is the default extra key bindings
+    let g:fzf_action = {
+      \ 'ctrl-t': 'tab split',
+      \ 'ctrl-x': 'split',
+      \ 'ctrl-v': 'vsplit' }
+
+    " An action can be a reference to a function that processes selected lines
+    function! s:build_quickfix_list(lines)
+      call setqflist(map(copy(a:lines), '{ "filename": v:val, "lnum": 1 }'))
+      copen
+      cc
+    endfunction
+
+    let g:fzf_action = {
+      \ 'ctrl-q': function('s:build_quickfix_list'),
+      \ 'ctrl-t': 'tab split',
+      \ 'ctrl-x': 'split',
+      \ 'ctrl-v': 'vsplit' }
+
+    " Default fzf layout
+    " - Popup window (center of the screen)
+    let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+
+    " - Popup window (center of the current window)
+    let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6, 'relative': v:true } }
+
+    " - Popup window (anchored to the bottom of the current window)
+    let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6, 'relative': v:true, 'yoffset': 1.0 } }
+
+    " - down / up / left / right
+    let g:fzf_layout = { 'down': '40%' }
+
+    " - Window using a Vim command
+    let g:fzf_layout = { 'window': 'enew' }
+    let g:fzf_layout = { 'window': '-tabnew' }
+    let g:fzf_layout = { 'window': '10new' }
+
+    " Customize fzf colors to match your color scheme
+    " - fzf#wrap translates this to a set of `--color` options
+    let g:fzf_colors =
+    \ { 'fg':      ['fg', 'Normal'],
+      \ 'bg':      ['bg', 'Normal'],
+      \ 'hl':      ['fg', 'Comment'],
+      \ 'fg+':     ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
+      \ 'bg+':     ['bg', 'CursorLine', 'CursorColumn'],
+      \ 'hl+':     ['fg', 'Statement'],
+      \ 'info':    ['fg', 'PreProc'],
+      \ 'border':  ['fg', 'Ignore'],
+      \ 'prompt':  ['fg', 'Conditional'],
+      \ 'pointer': ['fg', 'Exception'],
+      \ 'marker':  ['fg', 'Keyword'],
+      \ 'spinner': ['fg', 'Label'],
+      \ 'header':  ['fg', 'Comment'] }
+
+    " Enable per-command history
+    " - History files will be stored in the specified directory
+    " - When set, CTRL-N and CTRL-P will be bound to 'next-history' and
+    "   'previous-history' instead of 'down' and 'up'.
+    let g:fzf_history_dir = '~/.local/share/fzf-history'
+<
+
+Explanation of g:fzf_colors~
+                                                 *fzf-explanation-of-gfzfcolors*
+
+`g:fzf_colors` is a dictionary mapping fzf elements to a color specification
+list:
+>
+    element: [ component, group1 [, group2, ...] ]
+<
+ - `element` is an fzf element to apply a color to:
+
+ ----------------------------+------------------------------------------------------
+ Element                     | Description                                          ~
+ ----------------------------+------------------------------------------------------
+  `fg`   /  `bg`   /  `hl`         | Item (foreground / background / highlight)
+  `fg+`  /  `bg+`  /  `hl+`        | Current item (foreground / background / highlight)
+  `preview-fg`  /  `preview-bg`  | Preview window text and background
+  `hl`   /  `hl+`                | Highlighted substrings (normal / current)
+  `gutter`                     | Background of the gutter on the left
+  `pointer`                    | Pointer to the current line ( `>` )
+  `marker`                     | Multi-select marker ( `>` )
+  `border`                     | Border around the window ( `--border`  and  `--preview` )
+  `header`                     | Header ( `--header`  or  `--header-lines` )
+  `info`                       | Info line (match counters)
+  `spinner`                    | Streaming input indicator
+  `query`                      | Query string
+  `disabled`                   | Query string when search is disabled
+  `prompt`                     | Prompt before query ( `> ` )
+  `pointer`                    | Pointer to the current line ( `>` )
+ ----------------------------+------------------------------------------------------
+ - `component` specifies the component (`fg` / `bg`) from which to extract the
+   color when considering each of the following highlight groups
+ - `group1 [, group2, ...]` is a list of highlight groups that are searched (in
+   order) for a matching color definition
+
+For example, consider the following specification:
+>
+      'prompt':  ['fg', 'Conditional', 'Comment'],
+<
+This means we color the prompt - using the `fg` attribute of the `Conditional`
+if it exists, - otherwise use the `fg` attribute of the `Comment` highlight
+group if it exists, - otherwise fall back to the default color settings for
+the prompt.
+
+You can examine the color option generated according the setting by printing
+the result of `fzf#wrap()` function like so:
+>
+    :echo fzf#wrap()
+<
+
+FZF#RUN
+==============================================================================
+
+                                                                       *fzf#run*
+
+`fzf#run()` function is the core of Vim integration. It takes a single
+dictionary argument, a spec, and starts fzf process accordingly. At the very
+least, specify `sink` option to tell what it should do with the selected
+entry.
+>
+    call fzf#run({'sink': 'e'})
+<
+We haven't specified the `source`, so this is equivalent to starting fzf on
+command line without standard input pipe; fzf will traverse the file system
+under the current directory to get the list of files. (If
+`$FZF_DEFAULT_COMMAND` is set, fzf will use the output of the command
+instead.) When you select one, it will open it with the sink, `:e` command. If
+you want to open it in a new tab, you can pass `:tabedit` command instead as
+the sink.
+>
+    call fzf#run({'sink': 'tabedit'})
+<
+You can use any shell command as the source to generate the list. The
+following example will list the files managed by git. It's equivalent to
+running `git ls-files | fzf` on shell.
+>
+    call fzf#run({'source': 'git ls-files', 'sink': 'e'})
+<
+fzf options can be specified as `options` entry in spec dictionary.
+>
+    call fzf#run({'sink': 'tabedit', 'options': '--multi --reverse'})
+<
+You can also pass a layout option if you don't want fzf window to take up the
+entire screen.
+>
+    " up / down / left / right / window are allowed
+    call fzf#run({'source': 'git ls-files', 'sink': 'e', 'left': '40%'})
+    call fzf#run({'source': 'git ls-files', 'sink': 'e', 'window': '30vnew'})
+<
+`source` doesn't have to be an external shell command, you can pass a Vim
+array as the source. In the next example, we pass the names of color schemes
+as the source to implement a color scheme selector.
+>
+    call fzf#run({'source': map(split(globpath(&rtp, 'colors/*.vim')),
+                \               'fnamemodify(v:val, ":t:r")'),
+                \ 'sink': 'colo', 'left': '25%'})
+<
+The following table summarizes the available options.
+
+ ---------------------------+---------------+----------------------------------------------------------------------
+ Option name                | Type          | Description                                                          ~
+ ---------------------------+---------------+----------------------------------------------------------------------
+  `source`                    | string        | External command to generate input to fzf (e.g.  `find .` )
+  `source`                    | list          | Vim list as input to fzf
+  `sink`                      | string        | Vim command to handle the selected item (e.g.  `e` ,  `tabe` )
+  `sink`                      | funcref       | Function to be called with each selected item
+  `sinklist`  (or  `sink*` )    | funcref       | Similar to  `sink` , but takes the list of output lines at once
+  `exit`                      | funcref       | Function to be called with the exit status of fzf (e.g. 0, 1, 2, 130)
+  `options`                   | string/list   | Options to fzf
+  `dir`                       | string        | Working directory
+  `up` / `down` / `left` / `right`  | number/string | (Layout) Window position and size (e.g.  `20` ,  `50%` )
+  `tmux`                      | string        | (Layout) `--tmux` options (e.g.  `90%,70%` )
+  `window`  (Vim 8 / Neovim)  | string        | (Layout) Command to open fzf window (e.g.  `vertical aboveleft 30new` )
+  `window`  (Vim 8 / Neovim)  | dict          | (Layout) Popup window settings (e.g.  `{'width': 0.9, 'height': 0.6}` )
+ ---------------------------+---------------+----------------------------------------------------------------------
+
+`options` entry can be either a string or a list. For simple cases, string
+should suffice, but prefer to use list type to avoid escaping issues.
+>
+    call fzf#run({'options': '--reverse --prompt "C:\\Program Files\\"'})
+    call fzf#run({'options': ['--reverse', '--prompt', 'C:\Program Files\']})
+<
+When `window` entry is a dictionary, fzf will start in a popup window. The
+following options are allowed:
+
+ - Required:
+   - `width` [float range [0 ~ 1]] or [integer range [8 ~ ]]
+   - `height` [float range [0 ~ 1]] or [integer range [4 ~ ]]
+ - Optional:
+   - `yoffset` [float default 0.5 range [0 ~ 1]]
+   - `xoffset` [float default 0.5 range [0 ~ 1]]
+   - `relative` [boolean default v:false]
+   - `border` [string default `rounded` (`sharp` on Windows)]: Border style
+     - `rounded` / `sharp` / `horizontal` / `vertical` / `top` / `bottom` / `left` / `right` / `no[ne]`
+
+
+FZF#WRAP
+==============================================================================
+
+                                                                      *fzf#wrap*
+
+We have seen that several aspects of `:FZF` command can be configured with a
+set of global option variables; different ways to open files (`g:fzf_action`),
+window position and size (`g:fzf_layout`), color palette (`g:fzf_colors`),
+etc.
+
+So how can we make our custom `fzf#run` calls also respect those variables?
+Simply by "wrapping" the spec dictionary with `fzf#wrap` before passing it to
+`fzf#run`.
+
+ - `fzf#wrap([name string], [spec dict], [fullscreen bool]) -> (dict)`
+   - All arguments are optional. Usually we only need to pass a spec
+     dictionary.
+   - `name` is for managing history files. It is ignored if `g:fzf_history_dir`
+     is not defined.
+   - `fullscreen` can be either `0` or `1` (default: 0).
+
+`fzf#wrap` takes a spec and returns an extended version of it (also a
+dictionary) with additional options for addressing global preferences. You can
+examine the return value of it like so:
+>
+    echo fzf#wrap({'source': 'ls'})
+<
+After we "wrap" our spec, we pass it to `fzf#run`.
+>
+    call fzf#run(fzf#wrap({'source': 'ls'}))
+<
+Now it supports CTRL-T, CTRL-V, and CTRL-X key bindings (configurable via
+`g:fzf_action`) and it opens fzf window according to `g:fzf_layout` setting.
+
+To make it easier to use, let's define `LS` command.
+>
+    command! LS call fzf#run(fzf#wrap({'source': 'ls'}))
+<
+Type `:LS` and see how it works.
+
+We would like to make `:LS!` (bang version) open fzf in fullscreen, just like
+`:FZF!`. Add `-bang` to command definition, and use <bang> value to set the
+last `fullscreen` argument of `fzf#wrap` (see :help <bang>).
+>
+    " On :LS!, <bang> evaluates to '!', and '!0' becomes 1
+    command! -bang LS call fzf#run(fzf#wrap({'source': 'ls'}, <bang>0))
+<
+Our `:LS` command will be much more useful if we can pass a directory argument
+to it, so that something like `:LS /tmp` is possible.
+>
+    command! -bang -complete=dir -nargs=? LS
+        \ call fzf#run(fzf#wrap({'source': 'ls', 'dir': <q-args>}, <bang>0))
+<
+Lastly, if you have enabled `g:fzf_history_dir`, you might want to assign a
+unique name to our command and pass it as the first argument to `fzf#wrap`.
+>
+    " The query history for this command will be stored as 'ls' inside g:fzf_history_dir.
+    " The name is ignored if g:fzf_history_dir is not defined.
+    command! -bang -complete=dir -nargs=? LS
+        \ call fzf#run(fzf#wrap('ls', {'source': 'ls', 'dir': <q-args>}, <bang>0))
+<
+
+< Global options supported by fzf#wrap >______________________________________~
+                                      *fzf-global-options-supported-by-fzf#wrap*
+
+ - `g:fzf_layout`
+ - `g:fzf_action`
+   - Works only when no custom `sink` (or `sinklist`) is provided
+     - Having custom sink usually means that each entry is not an ordinary
+       file path (e.g. name of color scheme), so we can't blindly apply the
+       same strategy (i.e. `tabedit some-color-scheme` doesn't make sense)
+ - `g:fzf_colors`
+ - `g:fzf_history_dir`
+
+
+TIPS                                                                  *fzf-tips*
+==============================================================================
+
+
+< fzf inside terminal buffer >________________________________________________~
+                                                    *fzf-inside-terminal-buffer*
+
+
+On the latest versions of Vim and Neovim, fzf will start in a terminal buffer.
+If you find the default ANSI colors to be different, consider configuring the
+colors using `g:terminal_ansi_colors` in regular Vim or `g:terminal_color_x`
+in Neovim.
+
+>
+    " Terminal colors for seoul256 color scheme
+    if has('nvim')
+      let g:terminal_color_0 = '#4e4e4e'
+      let g:terminal_color_1 = '#d68787'
+      let g:terminal_color_2 = '#5f865f'
+      let g:terminal_color_3 = '#d8af5f'
+      let g:terminal_color_4 = '#85add4'
+      let g:terminal_color_5 = '#d7afaf'
+      let g:terminal_color_6 = '#87afaf'
+      let g:terminal_color_7 = '#d0d0d0'
+      let g:terminal_color_8 = '#626262'
+      let g:terminal_color_9 = '#d75f87'
+      let g:terminal_color_10 = '#87af87'
+      let g:terminal_color_11 = '#ffd787'
+      let g:terminal_color_12 = '#add4fb'
+      let g:terminal_color_13 = '#ffafaf'
+      let g:terminal_color_14 = '#87d7d7'
+      let g:terminal_color_15 = '#e4e4e4'
+    else
+      let g:terminal_ansi_colors = [
+        \ '#4e4e4e', '#d68787', '#5f865f', '#d8af5f',
+        \ '#85add4', '#d7afaf', '#87afaf', '#d0d0d0',
+        \ '#626262', '#d75f87', '#87af87', '#ffd787',
+        \ '#add4fb', '#ffafaf', '#87d7d7', '#e4e4e4'
+      \ ]
+    endif
+<
+
+< Starting fzf in a popup window >____________________________________________~
+                                            *fzf-starting-fzf-in-a-popup-window*
+>
+    " Required:
+    " - width [float range [0 ~ 1]] or [integer range [8 ~ ]]
+    " - height [float range [0 ~ 1]] or [integer range [4 ~ ]]
+    "
+    " Optional:
+    " - xoffset [float default 0.5 range [0 ~ 1]]
+    " - yoffset [float default 0.5 range [0 ~ 1]]
+    " - relative [boolean default v:false]
+    " - border [string default 'rounded']: Border style
+    "   - 'rounded' / 'sharp' / 'horizontal' / 'vertical' / 'top' / 'bottom' / 'left' / 'right'
+    let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+<
+Alternatively, you can make fzf open in a tmux popup window (requires tmux 3.2
+or above) by putting `--tmux` options in `tmux` key.
+>
+    " See `--tmux` option in `man fzf` for available options
+    " [center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]
+    if exists('$TMUX')
+      let g:fzf_layout = { 'tmux': '90%,70%' }
+    else
+      let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+    endif
+<
+
+< Hide statusline >___________________________________________________________~
+                                                           *fzf-hide-statusline*
+
+When fzf starts in a terminal buffer, the file type of the buffer is set to
+`fzf`. So you can set up `FileType fzf` autocmd to customize the settings of
+the window.
+
+For example, if you open fzf on the bottom on the screen (e.g. `{'down':
+'40%'}`), you might want to temporarily disable the statusline for a cleaner
+look.
+>
+    let g:fzf_layout = { 'down': '30%' }
+    autocmd! FileType fzf
+    autocmd  FileType fzf set laststatus=0 noshowmode noruler
+      \| autocmd BufLeave <buffer> set laststatus=2 showmode ruler
+<
+
+LICENSE                                                            *fzf-license*
+==============================================================================
+
+The MIT License (MIT)
+
+Copyright (c) 2013-2024 Junegunn Choi
+
+==============================================================================
+vim:tw=78:sw=2:ts=2:ft=help:norl:nowrap:

go.mod

@@ -0,0 +1,20 @@
+module github.com/junegunn/fzf
+
+require (
+	github.com/charlievieth/fastwalk v1.0.10
+	github.com/gdamore/tcell/v2 v2.8.1
+	github.com/junegunn/go-shellwords v0.0.0-20250127100254-2aa3b3277741
+	github.com/mattn/go-isatty v0.0.20
+	github.com/rivo/uniseg v0.4.7
+	golang.org/x/sys v0.30.0
+	golang.org/x/term v0.29.0
+)
+
+require (
+	github.com/gdamore/encoding v1.0.1 // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
+	golang.org/x/text v0.21.0 // indirect
+)
+
+go 1.20

go.sum

@@ -0,0 +1,87 @@
+github.com/charlievieth/fastwalk v1.0.10 h1:0qUbvA2O+K+X+IrTfZTC0UH2DK5MOA+KjVfStAHUnGg=
+github.com/charlievieth/fastwalk v1.0.10/go.mod h1:yGy1zbxog41ZVMcKA/i8ojXLFsuayX5VvwhQVoj9PBI=
+github.com/gdamore/encoding v1.0.1 h1:YzKZckdBL6jVt2Gc+5p82qhrGiqMdG/eNs6Wy0u3Uhw=
+github.com/gdamore/encoding v1.0.1/go.mod h1:0Z0cMFinngz9kS1QfMjCP8TY7em3bZYeeklsSDPivEo=
+github.com/gdamore/tcell/v2 v2.8.1 h1:KPNxyqclpWpWQlPLx6Xui1pMk8S+7+R37h3g07997NU=
+github.com/gdamore/tcell/v2 v2.8.1/go.mod h1:bj8ori1BG3OYMjmb3IklZVWfZUJ1UBQt9JXrOCOhGWw=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/junegunn/go-shellwords v0.0.0-20250127100254-2aa3b3277741 h1:7dYDtfMDfKzjT+DVfIS4iqknSEKtZpEcXtu6vuaasHs=
+github.com/junegunn/go-shellwords v0.0.0-20250127100254-2aa3b3277741/go.mod h1:6EILKtGpo5t+KLb85LNZLAF6P9LKp78hJI80PXMcn3c=
+github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
+github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
+github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/rivo/uniseg v0.4.3/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
+github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
+github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
+golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
+golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
+golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
+golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
+golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
+golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
+golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
+golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
+golang.org/x/term v0.28.0/go.mod h1:Sw/lC2IAUZ92udQNf3WodGtn4k/XoLyZoh8v/8uiwek=
+golang.org/x/term v0.29.0 h1:L6pJp37ocefwRRtYPKSWOWzOtWSxVajvz2ldH/xi3iU=
+golang.org/x/term v0.29.0/go.mod h1:6bl4lRlvVuDgSf3179VpIxBF0o10JUpXWOnI7nErv7s=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
+golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
+golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

install

@@ -2,12 +2,14 @@
 
 set -u
 
-version=0.16.0
+version=0.62.0
 auto_completion=
 key_bindings=
 update_config=2
-binary_arch=
-allow_legacy=
+shells="bash zsh fish"
+prefix='~/.fzf'
+prefix_expand=~/.fzf
+fish_dir=${XDG_CONFIG_HOME:-$HOME/.config}/fish
 
 help() {
   cat << EOF
@@ -17,12 +19,14 @@ usage: $0 [OPTIONS]
     --bin                Download fzf binary only; Do not generate ~/.fzf.{bash,zsh}
     --all                Download fzf binary and update configuration files
                          to enable key bindings and fuzzy completion
+    --xdg                Generate files under \$XDG_CONFIG_HOME/fzf
     --[no-]key-bindings  Enable/disable key bindings (CTRL-T, CTRL-R, ALT-C)
     --[no-]completion    Enable/disable fuzzy completion (bash & zsh)
     --[no-]update-rc     Whether or not to update shell configuration files
 
-    --32                 Download 32-bit binary
-    --64                 Download 64-bit binary
+    --no-bash            Do not set up bash configuration
+    --no-zsh             Do not set up zsh configuration
+    --no-fish            Do not set up fish configuration
 EOF
 }
 
@@ -36,7 +40,11 @@ for opt in "$@"; do
       auto_completion=1
       key_bindings=1
       update_config=1
-      allow_legacy=1
+      ;;
+    --xdg)
+      prefix='"${XDG_CONFIG_HOME:-$HOME/.config}"/fzf/fzf'
+      prefix_expand=${XDG_CONFIG_HOME:-$HOME/.config}/fzf/fzf
+      mkdir -p "${XDG_CONFIG_HOME:-$HOME/.config}/fzf"
       ;;
     --key-bindings)    key_bindings=1    ;;
     --no-key-bindings) key_bindings=0    ;;
@@ -44,9 +52,10 @@ for opt in "$@"; do
     --no-completion)   auto_completion=0 ;;
     --update-rc)       update_config=1   ;;
     --no-update-rc)    update_config=0   ;;
-    --32)              binary_arch=386   ;;
-    --64)              binary_arch=amd64 ;;
     --bin)             ;;
+    --no-bash)         shells=${shells/bash/} ;;
+    --no-zsh)          shells=${shells/zsh/} ;;
+    --no-fish)         shells=${shells/fish/} ;;
     *)
       echo "unknown option: $opt"
       help
@@ -56,53 +65,47 @@ for opt in "$@"; do
 done
 
 cd "$(dirname "${BASH_SOURCE[0]}")"
-fzf_base="$(pwd)"
+fzf_base=$(pwd)
+fzf_base_esc=$(printf %q "$fzf_base")
 
 ask() {
-  # If stdin is a tty, we are "interactive".
-  # non-interactive shell: wait for a linefeed
-  #     interactive shell: continue after a single keypress
-  read_n=$([ -t 0 ] && echo "-n 1")
-
-  read -p "$1 ([y]/n) " $read_n -r
-  echo
-  [[ $REPLY =~ ^[Nn]$ ]]
+  while true; do
+    read -p "$1 ([y]/n) " -r
+    REPLY=${REPLY:-"y"}
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+      return 1
+    elif [[ $REPLY =~ ^[Nn]$ ]]; then
+      return 0
+    fi
+  done
 }
 
 check_binary() {
   echo -n "  - Checking fzf executable ... "
   local output
-  output=$("$fzf_base"/bin/fzf --version 2>&1)
+  output=$(FZF_DEFAULT_OPTS= "$fzf_base"/bin/fzf --version 2>&1)
   if [ $? -ne 0 ]; then
     echo "Error: $output"
     binary_error="Invalid binary"
-  elif [ "$version" != "$output" ]; then
-    echo "$output != $version"
-    binary_error="Invalid version"
   else
-    echo "$output"
-    binary_error=""
-    return 0
+    output=${output/ */}
+    if [ "$version" != "$output" ]; then
+      echo "$output != $version"
+      binary_error="Invalid version"
+    else
+      echo "$output"
+      binary_error=""
+      return 0
+    fi
   fi
   rm -f "$fzf_base"/bin/fzf
   return 1
 }
 
-symlink() {
-  echo "  - Creating symlink: bin/$1 -> bin/fzf"
-  (cd "$fzf_base"/bin &&
-   rm -f fzf &&
-   ln -sf $1 fzf)
-  if [ $? -ne 0 ]; then
-    binary_error="Failed to create symlink"
-    return 1
-  fi
-}
-
 link_fzf_in_path() {
   if which_fzf="$(command -v fzf)"; then
     echo "  - Found in \$PATH"
-    echo "  - Creating symlink: $which_fzf -> bin/fzf"
+    echo "  - Creating symlink: bin/fzf -> $which_fzf"
     (cd "$fzf_base"/bin && rm -f fzf && ln -sf "$which_fzf" fzf)
     check_binary && return
   fi
@@ -110,25 +113,32 @@ link_fzf_in_path() {
 }
 
 try_curl() {
-  command -v curl > /dev/null && curl -fL $1 | tar -xz
+  command -v curl > /dev/null &&
+  if [[ $1 =~ tar.gz$ ]]; then
+    curl -fL $1 | tar --no-same-owner -xzf -
+  else
+    local temp=${TMPDIR:-/tmp}/fzf.zip
+    curl -fLo "$temp" $1 && unzip -o "$temp" && rm -f "$temp"
+  fi
 }
 
 try_wget() {
-  command -v wget > /dev/null && wget -O - $1 | tar -xz
+  command -v wget > /dev/null &&
+  if [[ $1 =~ tar.gz$ ]]; then
+    wget -O - $1 | tar --no-same-owner -xzf -
+  else
+    local temp=${TMPDIR:-/tmp}/fzf.zip
+    wget -O "$temp" $1 && unzip -o "$temp" && rm -f "$temp"
+  fi
 }
 
 download() {
   echo "Downloading bin/fzf ..."
-  if [[ ! "$version" =~ alpha ]]; then
-    if [ -x "$fzf_base"/bin/fzf ]; then
-      echo "  - Already exists"
-      check_binary && return
-    fi
-    if [ -x "$fzf_base"/bin/$1 ]; then
-      symlink $1 && check_binary && return
-    fi
-    link_fzf_in_path && return
+  if [ -x "$fzf_base"/bin/fzf ]; then
+    echo "  - Already exists"
+    check_binary && return
   fi
+  link_fzf_in_path && return
   mkdir -p "$fzf_base"/bin && cd "$fzf_base"/bin
   if [ $? -ne 0 ]; then
     binary_error="Failed to create bin directory"
@@ -136,9 +146,7 @@ download() {
   fi
 
   local url
-  [[ "$version" =~ alpha ]] &&
-    url=https://github.com/junegunn/fzf-bin/releases/download/alpha/${1}.tgz ||
-    url=https://github.com/junegunn/fzf-bin/releases/download/$version/${1}.tgz
+  url=https://github.com/junegunn/fzf/releases/download/v$version/${1}
   set -o pipefail
   if ! (try_curl $url || try_wget $url); then
     set +o pipefail
@@ -147,12 +155,12 @@ download() {
   fi
   set +o pipefail
 
-  if [ ! -f $1 ]; then
+  if [ ! -f fzf ]; then
     binary_error="Failed to download ${1}"
     return
   fi
 
-  chmod +x $1 && symlink $1 && check_binary
+  chmod +x fzf && check_binary
 }
 
 # Try to download binary executable
@@ -160,84 +168,26 @@ archi=$(uname -sm)
 binary_available=1
 binary_error=""
 case "$archi" in
-  Darwin\ x86_64) download fzf-$version-darwin_${binary_arch:-amd64} ;;
-  Darwin\ i*86)   download fzf-$version-darwin_${binary_arch:-386}   ;;
-  Linux\ x86_64)  download fzf-$version-linux_${binary_arch:-amd64}  ;;
-  Linux\ i*86)    download fzf-$version-linux_${binary_arch:-386}    ;;
-  *)              binary_available=0 binary_error=1  ;;
+  Darwin\ arm64)      download fzf-$version-darwin_arm64.tar.gz  ;;
+  Darwin\ x86_64)     download fzf-$version-darwin_amd64.tar.gz  ;;
+  Linux\ armv5*)      download fzf-$version-linux_armv5.tar.gz   ;;
+  Linux\ armv6*)      download fzf-$version-linux_armv6.tar.gz   ;;
+  Linux\ armv7*)      download fzf-$version-linux_armv7.tar.gz   ;;
+  Linux\ armv8*)      download fzf-$version-linux_arm64.tar.gz   ;;
+  Linux\ aarch64*)    download fzf-$version-linux_arm64.tar.gz   ;;
+  Linux\ loongarch64) download fzf-$version-linux_loong64.tar.gz ;;
+  Linux\ ppc64le)     download fzf-$version-linux_ppc64le.tar.gz ;;
+  Linux\ *64)         download fzf-$version-linux_amd64.tar.gz   ;;
+  Linux\ s390x)       download fzf-$version-linux_s390x.tar.gz   ;;
+  FreeBSD\ *64)       download fzf-$version-freebsd_amd64.tar.gz ;;
+  OpenBSD\ *64)       download fzf-$version-openbsd_amd64.tar.gz ;;
+  CYGWIN*\ *64)       download fzf-$version-windows_amd64.zip    ;;
+  MINGW*\ *64)        download fzf-$version-windows_amd64.zip    ;;
+  MSYS*\ *64)         download fzf-$version-windows_amd64.zip    ;;
+  Windows*\ *64)      download fzf-$version-windows_amd64.zip    ;;
+  *)                  binary_available=0 binary_error=1          ;;
 esac
 
-install_ruby_fzf() {
-  if [ -z "$allow_legacy" ]; then
-    ask "Do you want to install legacy Ruby version instead?" && exit 1
-  fi
-  echo "Installing legacy Ruby version ..."
-
-  # ruby executable
-  echo -n "Checking Ruby executable ... "
-  ruby=$(command -v ruby)
-  if [ $? -ne 0 ]; then
-    echo "ruby executable not found !!!"
-    exit 1
-  fi
-
-  # System ruby is preferred
-  system_ruby=/usr/bin/ruby
-  if [ -x $system_ruby ] && [ $system_ruby != "$ruby" ]; then
-    $system_ruby --disable-gems -rcurses -e0 2> /dev/null
-    [ $? -eq 0 ] && ruby=$system_ruby
-  fi
-
-  echo "OK ($ruby)"
-
-  # Curses-support
-  echo -n "Checking Curses support ... "
-  "$ruby" -rcurses -e0 2> /dev/null
-  if [ $? -eq 0 ]; then
-    echo "OK"
-  else
-    echo "Not found"
-    echo "Installing 'curses' gem ... "
-    if (( EUID )); then
-      /usr/bin/env gem install curses --user-install
-    else
-      /usr/bin/env gem install curses
-    fi
-    if [ $? -ne 0 ]; then
-      echo
-      echo "Failed to install 'curses' gem."
-      if [[ $(uname -r) =~ 'ARCH' ]]; then
-        echo "Make sure that base-devel package group is installed."
-      fi
-      exit 1
-    fi
-  fi
-
-  # Ruby version
-  echo -n "Checking Ruby version ... "
-  "$ruby" -e 'exit RUBY_VERSION >= "1.9"'
-  if [ $? -eq 0 ]; then
-    echo ">= 1.9"
-    "$ruby" --disable-gems -rcurses -e0 2> /dev/null
-    if [ $? -eq 0 ]; then
-      fzf_cmd="$ruby --disable-gems $fzf_base/fzf"
-    else
-      fzf_cmd="$ruby $fzf_base/fzf"
-    fi
-  else
-    echo "< 1.9"
-    fzf_cmd="$ruby $fzf_base/fzf"
-  fi
-
-  # Create fzf script
-  echo -n "Creating wrapper script for fzf ... "
-  rm -f "$fzf_base"/bin/fzf
-  echo "#!/bin/sh" > "$fzf_base"/bin/fzf
-  echo "$fzf_cmd \"\$@\"" >> "$fzf_base"/bin/fzf
-  chmod +x "$fzf_base"/bin/fzf
-  echo "OK"
-}
-
 cd "$fzf_base"
 if [ -n "$binary_error" ]; then
   if [ $binary_available -eq 0 ]; then
@@ -246,26 +196,37 @@ if [ -n "$binary_error" ]; then
     echo "  - $binary_error !!!"
   fi
   if command -v go > /dev/null; then
-    echo -n "Building binary (go get -u github.com/junegunn/fzf/src/fzf) ... "
+    echo -n "Building binary (go install github.com/junegunn/fzf) ... "
     if [ -z "${GOPATH-}" ]; then
       export GOPATH="${TMPDIR:-/tmp}/fzf-gopath"
       mkdir -p "$GOPATH"
     fi
-    if go get -u github.com/junegunn/fzf/src/fzf; then
+    if go install -ldflags "-s -w -X main.version=$version -X main.revision=go-install" github.com/junegunn/fzf; then
       echo "OK"
       cp "$GOPATH/bin/fzf" "$fzf_base/bin/"
     else
-      echo "Failed to build binary ..."
-      install_ruby_fzf
+      echo "Failed to build binary. Installation failed."
+      exit 1
     fi
   else
-    echo "go executable not found. Cannot build binary ..."
-    install_ruby_fzf
+    echo "go executable not found. Installation failed."
+    exit 1
   fi
 fi
 
 [[ "$*" =~ "--bin" ]] && exit 0
 
+for s in $shells; do
+  if ! command -v "$s" > /dev/null; then
+    shells=${shells/$s/}
+  fi
+done
+
+if [[ ${#shells} -lt 3 ]]; then
+  echo "No shell configuration to be updated."
+  exit 0
+fi
+
 # Auto-completion
 if [ -z "$auto_completion" ]; then
   ask "Do you want to enable fuzzy auto-completion?"
@@ -279,13 +240,12 @@ if [ -z "$key_bindings" ]; then
 fi
 
 echo
-has_zsh=$(command -v zsh > /dev/null && echo 1 || echo 0)
-shells=$([ $has_zsh -eq 1 ] && echo "bash zsh" || echo "bash")
 for shell in $shells; do
-  echo -n "Generate ~/.fzf.$shell ... "
-  src=~/.fzf.${shell}
+  [[ "$shell" = fish ]] && continue
+  src=${prefix_expand}.${shell}
+  echo -n "Generate $src ... "
 
-  fzf_completion="[[ \$- == *i* ]] && source \"$fzf_base/shell/completion.${shell}\" 2> /dev/null"
+  fzf_completion="source \"$fzf_base/shell/completion.${shell}\""
   if [ $auto_completion -eq 0 ]; then
     fzf_completion="# $fzf_completion"
   fi
@@ -295,13 +255,23 @@ for shell in $shells; do
     fzf_key_bindings="# $fzf_key_bindings"
   fi
 
-  cat > $src << EOF
+  cat > "$src" << EOF
 # Setup fzf
 # ---------
-if [[ ! "\$PATH" == *$fzf_base/bin* ]]; then
-  export PATH="\$PATH:$fzf_base/bin"
+if [[ ! "\$PATH" == *$fzf_base_esc/bin* ]]; then
+  PATH="\${PATH:+\${PATH}:}$fzf_base/bin"
 fi
 
+EOF
+
+  if [[ $auto_completion -eq 1 ]] && [[ $key_bindings -eq 1 ]]; then
+    if [[ "$shell" = zsh ]]; then
+      echo "source <(fzf --$shell)" >> "$src"
+    else
+      echo "eval \"\$(fzf --$shell)\"" >> "$src"
+    fi
+  else
+    cat >> "$src" << EOF
 # Auto-completion
 # ---------------
 $fzf_completion
@@ -309,71 +279,75 @@ $fzf_completion
 # Key bindings
 # ------------
 $fzf_key_bindings
-
 EOF
+  fi
   echo "OK"
 done
 
 # fish
-has_fish=$(command -v fish > /dev/null && echo 1 || echo 0)
-if [ $has_fish -eq 1 ]; then
+if [[ "$shells" =~ fish ]]; then
   echo -n "Update fish_user_paths ... "
   fish << EOF
-  echo \$fish_user_paths | grep $fzf_base/bin > /dev/null
-  or set --universal fish_user_paths \$fish_user_paths $fzf_base/bin
+  echo \$fish_user_paths | \grep "$fzf_base"/bin > /dev/null
+  or set --universal fish_user_paths \$fish_user_paths "$fzf_base"/bin
 EOF
   [ $? -eq 0 ] && echo "OK" || echo "Failed"
-
-  mkdir -p ~/.config/fish/functions
-  if [ -e ~/.config/fish/functions/fzf.fish ]; then
-    echo -n "Remove unnecessary ~/.config/fish/functions/fzf.fish ... "
-    rm -f ~/.config/fish/functions/fzf.fish && echo "OK" || echo "Failed"
-  fi
-
-  fish_binding=~/.config/fish/functions/fzf_key_bindings.fish
-  if [ $key_bindings -ne 0 ]; then
-    echo -n "Symlink $fish_binding ... "
-    ln -sf "$fzf_base/shell/key-bindings.fish" \
-           "$fish_binding" && echo "OK" || echo "Failed"
-  else
-    echo -n "Removing $fish_binding ... "
-    rm -f "$fish_binding"
-    echo "OK"
-  fi
 fi
 
 append_line() {
-  set -e
-
-  local update line file pat lno
+  local update line file pat lines
   update="$1"
   line="$2"
   file="$3"
   pat="${4:-}"
+  lines=""
 
   echo "Update $file:"
   echo "  - $line"
-  [ -f "$file" ] || touch "$file"
-  if [ $# -lt 4 ]; then
-    lno=$(\grep -nF "$line" "$file" | sed 's/:.*//' | tr '\n' ' ')
-  else
-    lno=$(\grep -nF "$pat" "$file" | sed 's/:.*//' | tr '\n' ' ')
-  fi
-  if [ -n "$lno" ]; then
-    echo "    - Already exists: line #$lno"
-  else
-    if [ $update -eq 1 ]; then
-      echo >> "$file"
-      echo "$line" >> "$file"
-      echo "    + Added"
+  if [ -f "$file" ]; then
+    if [ $# -lt 4 ]; then
+      lines=$(\grep -nF "$line" "$file")
     else
-      echo "    ~ Skipped"
+      lines=$(\grep -nF "$pat" "$file")
     fi
   fi
+
+  if [ -n "$lines" ]; then
+    echo "    - Already exists:"
+    sed 's/^/        Line /' <<< "$lines"
+
+    update=0
+    if ! \grep -qv "^[0-9]*:[[:space:]]*#" <<< "$lines" ; then
+      echo "    - But they all seem to be commented"
+      ask  "    - Continue modifying $file?"
+      update=$?
+    fi
+  fi
+
+  set -e
+  if [ "$update" -eq 1 ]; then
+    [ -f "$file" ] && echo >> "$file"
+    echo "$line" >> "$file"
+    echo "    + Added"
+  else
+    echo "    ~ Skipped"
+  fi
+
   echo
   set +e
 }
 
+create_file() {
+  local file="$1"
+  shift
+  echo "Create $file:"
+  for line in "$@"; do
+    echo "    $line"
+    echo "$line" >> "$file"
+  done
+  echo
+}
+
 if [ $update_config -eq 2 ]; then
   echo
   ask "Do you want to update your shell configuration files?"
@@ -381,23 +355,45 @@ if [ $update_config -eq 2 ]; then
 fi
 echo
 for shell in $shells; do
+  [[ "$shell" = fish ]] && continue
   [ $shell = zsh ] && dest=${ZDOTDIR:-~}/.zshrc || dest=~/.bashrc
-  append_line $update_config "[ -f ~/.fzf.${shell} ] && source ~/.fzf.${shell}" "$dest" "~/.fzf.${shell}"
+  append_line $update_config "[ -f ${prefix}.${shell} ] && source ${prefix}.${shell}" "$dest" "${prefix}.${shell}"
 done
 
-if [ $key_bindings -eq 1 ] && [ $has_fish -eq 1 ]; then
-  bind_file=~/.config/fish/functions/fish_user_key_bindings.fish
-  append_line $update_config "fzf_key_bindings" "$bind_file"
+if [ $key_bindings -eq 1 ] && [[ "$shells" =~ fish ]]; then
+  bind_file="${fish_dir}/functions/fish_user_key_bindings.fish"
+  if [ ! -e "$bind_file" ]; then
+    mkdir -p "${fish_dir}/functions"
+    create_file "$bind_file" \
+      'function fish_user_key_bindings' \
+      '  fzf --fish | source' \
+      'end'
+  else
+    echo "Check $bind_file:"
+    lno=$(\grep -nF "fzf_key_bindings" "$bind_file" | sed 's/:.*//' | tr '\n' ' ')
+    if [[ -n $lno ]]; then
+      echo "  ** Found 'fzf_key_bindings' in line #$lno"
+      echo "  ** You have to replace the line to 'fzf --fish | source'"
+      echo
+    else
+      echo "  - Clear"
+      echo
+      append_line $update_config "fzf --fish | source" "$bind_file"
+    fi
+  fi
 fi
 
 if [ $update_config -eq 1 ]; then
   echo 'Finished. Restart your shell or reload config file.'
-  echo '   source ~/.bashrc  # bash'
-  [ $has_zsh  -eq 1 ] && echo "   source ${ZDOTDIR:-~}/.zshrc   # zsh"
-  [ $has_fish -eq 1 ] && [ $key_bindings -eq 1 ] && echo '   fzf_key_bindings  # fish'
+  if [[ "$shells" =~ bash ]]; then
+    echo -n '   source ~/.bashrc  # bash'
+    [[ "$archi" =~ Darwin ]] && echo -n '  (.bashrc should be loaded from .bash_profile)'
+    echo
+  fi
+  [[ "$shells" =~ zsh ]]  && echo "   source ${ZDOTDIR:-~}/.zshrc   # zsh"
+  [[ "$shells" =~ fish ]] && [ $key_bindings -eq 1 ] && echo '   fzf_key_bindings  # fish'
   echo
   echo 'Use uninstall script to remove fzf.'
   echo
 fi
 echo 'For more information, see: https://github.com/junegunn/fzf'
-

install.ps1

@@ -0,0 +1,65 @@
+$version="0.62.0"
+
+$fzf_base=Split-Path -Parent $MyInvocation.MyCommand.Definition
+
+function check_binary () {
+  Write-Host "  - Checking fzf executable ... " -NoNewline
+  $output=cmd /c $fzf_base\bin\fzf.exe --version 2>&1
+  if (-not $?) {
+    Write-Host "Error: $output"
+    $binary_error="Invalid binary"
+  } else {
+    $output=(-Split $output)[0]
+    if ($version -ne $output) {
+      Write-Host "$output != $version"
+      $binary_error="Invalid version"
+    } else {
+      Write-Host "$output"
+      $binary_error=""
+      return 1
+    }
+  }
+  Remove-Item "$fzf_base\bin\fzf.exe"
+  return 0
+}
+
+function download {
+  param($file)
+  Write-Host "Downloading bin/fzf ..."
+  if (Test-Path "$fzf_base\bin\fzf.exe") {
+    Write-Host "  - Already exists"
+    if (check_binary) {
+      return
+    }
+  }
+  if (-not (Test-Path "$fzf_base\bin")) {
+    md "$fzf_base\bin"
+  }
+  if (-not $?) {
+    $binary_error="Failed to create bin directory"
+    return
+  }
+  cd "$fzf_base\bin"
+  $url="https://github.com/junegunn/fzf/releases/download/v$version/$file"
+  $temp=$env:TMP + "\fzf.zip"
+  [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+  if ($PSVersionTable.PSVersion.Major -ge 3) {
+    Invoke-WebRequest -Uri $url -OutFile $temp
+  } else {
+    (New-Object Net.WebClient).DownloadFile($url, $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath("$temp"))
+  }
+  if ($?) {
+    (Microsoft.PowerShell.Archive\Expand-Archive -Path $temp -DestinationPath .); (Remove-Item $temp)
+  } else {
+    $binary_error="Failed to download with powershell"
+  }
+  if (-not (Test-Path fzf.exe)) {
+    $binary_error="Failed to download $file"
+    return
+  }
+  echo y | icacls $fzf_base\bin\fzf.exe /grant Administrator:F ; check_binary >$null
+}
+
+download "fzf-$version-windows_amd64.zip"
+
+Write-Host 'For more information, see: https://github.com/junegunn/fzf'

main.go

@@ -0,0 +1,101 @@
+package main
+
+import (
+	_ "embed"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	fzf "github.com/junegunn/fzf/src"
+	"github.com/junegunn/fzf/src/protector"
+)
+
+var version = "0.62"
+var revision = "devel"
+
+//go:embed shell/key-bindings.bash
+var bashKeyBindings []byte
+
+//go:embed shell/completion.bash
+var bashCompletion []byte
+
+//go:embed shell/key-bindings.zsh
+var zshKeyBindings []byte
+
+//go:embed shell/completion.zsh
+var zshCompletion []byte
+
+//go:embed shell/key-bindings.fish
+var fishKeyBindings []byte
+
+//go:embed man/man1/fzf.1
+var manPage []byte
+
+func printScript(label string, content []byte) {
+	fmt.Println("### " + label + " ###")
+	fmt.Println(strings.TrimSpace(string(content)))
+	fmt.Println("### end: " + label + " ###")
+}
+
+func exit(code int, err error) {
+	if code == fzf.ExitError && err != nil {
+		fmt.Fprintln(os.Stderr, err.Error())
+	}
+	os.Exit(code)
+}
+
+func main() {
+	protector.Protect()
+
+	options, err := fzf.ParseOptions(true, os.Args[1:])
+	if err != nil {
+		exit(fzf.ExitError, err)
+		return
+	}
+	if options.Bash {
+		printScript("key-bindings.bash", bashKeyBindings)
+		printScript("completion.bash", bashCompletion)
+		return
+	}
+	if options.Zsh {
+		printScript("key-bindings.zsh", zshKeyBindings)
+		printScript("completion.zsh", zshCompletion)
+		return
+	}
+	if options.Fish {
+		printScript("key-bindings.fish", fishKeyBindings)
+		fmt.Println("fzf_key_bindings")
+		return
+	}
+	if options.Help {
+		fmt.Print(fzf.Usage)
+		return
+	}
+	if options.Version {
+		if len(revision) > 0 {
+			fmt.Printf("%s (%s)\n", version, revision)
+		} else {
+			fmt.Println(version)
+		}
+		return
+	}
+	if options.Man {
+		file := fzf.WriteTemporaryFile([]string{string(manPage)}, "\n")
+		if len(file) == 0 {
+			fmt.Print(string(manPage))
+			return
+		}
+		defer os.Remove(file)
+		cmd := exec.Command("man", file)
+		cmd.Stdin = os.Stdin
+		cmd.Stdout = os.Stdout
+		if err := cmd.Run(); err != nil {
+			fmt.Print(string(manPage))
+		}
+		return
+	}
+
+	code, err := fzf.Run(options)
+	exit(code, err)
+}

man/man1/fzf-tmux.1

@@ -1,7 +1,7 @@
 .ig
 The MIT License (MIT)
 
-Copyright (c) 2017 Junegunn Choi
+Copyright (c) 2013-2024 Junegunn Choi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -21,34 +21,48 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ..
-.TH fzf-tmux 1 "Jan 2017" "fzf 0.16.0" "fzf-tmux - open fzf in tmux split pane"
+.TH fzf\-tmux 1 "May 2025" "fzf 0.62.0" "fzf\-tmux - open fzf in tmux split pane"
 
 .SH NAME
-fzf-tmux - open fzf in tmux split pane
+fzf\-tmux - open fzf in tmux split pane
 
 .SH SYNOPSIS
-.B fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
+.B fzf\-tmux [\fILAYOUT OPTIONS\fR] [\-\-] [\fIFZF OPTIONS\fR]
 
 .SH DESCRIPTION
-fzf-tmux is a wrapper script for fzf that opens fzf in a tmux split pane. It is
-designed to work just like fzf except that it does not take up the whole
-screen. You can safely use fzf-tmux instead of fzf in your scripts as the extra
-options will be silently ignored if you're not on tmux.
+fzf\-tmux is a wrapper script for fzf that opens fzf in a tmux split pane or in
+a tmux popup window. It is designed to work just like fzf except that it does
+not take up the whole screen. You can safely use fzf\-tmux instead of fzf in
+your scripts as the extra options will be silently ignored if you're not on
+tmux.
 
-.SH OPTIONS
-.SS Layout
+.SH LAYOUT OPTIONS
 
-(default: \fB-d 50%\fR)
+(default layout: \fB\-d 50%\fR)
 
+.SS Popup window
+(requires tmux 3.2 or above)
 .TP
-.B "-u [height[%]]"
+.B "\-p [WIDTH[%][,HEIGHT[%]]]"
+.TP
+.B "\-w WIDTH[%]"
+.TP
+.B "\-h WIDTH[%]"
+.TP
+.B "\-x COL"
+.TP
+.B "\-y ROW"
+
+.SS Split pane
+.TP
+.B "\-u [height[%]]"
 Split above (up)
 .TP
-.B "-d [height[%]]"
+.B "\-d [height[%]]"
 Split below (down)
 .TP
-.B "-l [width[%]]"
+.B "\-l [width[%]]"
 Split left
 .TP
-.B "-r [width[%]]"
+.B "\-r [width[%]]"
 Split right

shell/completion.bash

@@ -1,46 +1,98 @@
-#!/bin/bash
 #     ____      ____
 #    / __/___  / __/
 #   / /_/_  / / /_
 #  / __/ / /_/ __/
-# /_/   /___/_/-completion.bash
+# /_/   /___/_/ completion.bash
 #
-# - $FZF_TMUX               (default: 0)
-# - $FZF_TMUX_HEIGHT        (default: '40%')
-# - $FZF_COMPLETION_TRIGGER (default: '**')
-# - $FZF_COMPLETION_OPTS    (default: empty)
+# - $FZF_TMUX                 (default: 0)
+# - $FZF_TMUX_OPTS            (default: empty)
+# - $FZF_COMPLETION_TRIGGER   (default: '**')
+# - $FZF_COMPLETION_OPTS      (default: empty)
+# - $FZF_COMPLETION_PATH_OPTS (default: empty)
+# - $FZF_COMPLETION_DIR_OPTS  (default: empty)
+
+if [[ $- =~ i ]]; then
+
 
 # To use custom commands instead of find, override _fzf_compgen_{path,dir}
-if ! declare -f _fzf_compgen_path > /dev/null; then
-  _fzf_compgen_path() {
-    echo "$1"
-    command find -L "$1" \
-      -name .git -prune -o -name .svn -prune -o \( -type d -o -type f -o -type l \) \
-      -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
-  }
-fi
-
-if ! declare -f _fzf_compgen_dir > /dev/null; then
-  _fzf_compgen_dir() {
-    command find -L "$1" \
-      -name .git -prune -o -name .svn -prune -o -type d \
-      -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
-  }
-fi
+#
+#   _fzf_compgen_path() {
+#     echo "$1"
+#     command find -L "$1" \
+#       -name .git -prune -o -name .hg -prune -o -name .svn -prune -o \( -type d -o -type f -o -type l \) \
+#       -a -not -path "$1" -print 2> /dev/null | command sed 's@^\./@@'
+#   }
+#
+#   _fzf_compgen_dir() {
+#     command find -L "$1" \
+#       -name .git -prune -o -name .hg -prune -o -name .svn -prune -o -type d \
+#       -a -not -path "$1" -print 2> /dev/null | command sed 's@^\./@@'
+#   }
 
 ###########################################################
 
 # To redraw line after fzf closes (printf '\e[5n')
-bind '"\e[0n": redraw-current-line'
+bind '"\e[0n": redraw-current-line' 2> /dev/null
 
-__fzfcmd_complete() {
-  [ -n "$TMUX_PANE" ] && [ "${FZF_TMUX:-0}" != 0 ] && [ ${LINES:-40} -gt 15 ] &&
-    echo "fzf-tmux -d${FZF_TMUX_HEIGHT:-40%}" || echo "fzf"
+__fzf_defaults() {
+  # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  echo "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo "${FZF_DEFAULT_OPTS-} $2"
 }
 
-_fzf_orig_completion_filter() {
-  sed 's/^\(.*-F\) *\([^ ]*\).* \([^ ]*\)$/export _fzf_orig_completion_\3="\1 %s \3 #\2";/' |
-  awk -F= '{gsub(/[^A-Za-z0-9_= ;]/, "_", $1); print $1"="$2}'
+__fzf_comprun() {
+  if [[ "$(type -t _fzf_comprun 2>&1)" = function ]]; then
+    _fzf_comprun "$@"
+  elif [[ -n "${TMUX_PANE-}" ]] && { [[ "${FZF_TMUX:-0}" != 0 ]] || [[ -n "${FZF_TMUX_OPTS-}" ]]; }; then
+    shift
+    fzf-tmux ${FZF_TMUX_OPTS:--d${FZF_TMUX_HEIGHT:-40%}} -- "$@"
+  else
+    shift
+    fzf "$@"
+  fi
+}
+
+__fzf_orig_completion() {
+  local l comp f cmd
+  while read -r l; do
+    if [[ "$l" =~ ^(.*\ -F)\ *([^ ]*).*\ ([^ ]*)$ ]]; then
+      comp="${BASH_REMATCH[1]}"
+      f="${BASH_REMATCH[2]}"
+      cmd="${BASH_REMATCH[3]}"
+      [[ "$f" = _fzf_* ]] && continue
+      printf -v "_fzf_orig_completion_${cmd//[^A-Za-z0-9_]/_}" "%s" "${comp} %s ${cmd} #${f}"
+      if [[ "$l" = *" -o nospace "* ]] && [[ ! "${__fzf_nospace_commands-}" = *" $cmd "* ]]; then
+        __fzf_nospace_commands="${__fzf_nospace_commands-} $cmd "
+      fi
+    fi
+  done
+}
+
+# @param $1 cmd - Command name for which the original completion is searched
+# @var[out] REPLY - Original function name is returned
+__fzf_orig_completion_get_orig_func() {
+  local cmd orig_var orig
+  cmd=$1
+  orig_var="_fzf_orig_completion_${cmd//[^A-Za-z0-9_]/_}"
+  orig="${!orig_var-}"
+  REPLY="${orig##*#}"
+  [[ $REPLY ]] && type "$REPLY" &> /dev/null
+}
+
+# @param $1 cmd - Command name for which the original completion is searched
+# @param $2 func - Fzf's completion function to replace the original function
+# @var[out] REPLY - Completion setting is returned as a string to "eval"
+__fzf_orig_completion_instantiate() {
+  local cmd func orig_var orig
+  cmd=$1
+  func=$2
+  orig_var="_fzf_orig_completion_${cmd//[^A-Za-z0-9_]/_}"
+  orig="${!orig_var-}"
+  orig="${orig%#*}"
+  [[ $orig == *' %s '* ]] || return 1
+  printf -v REPLY "$orig" "$func"
 }
 
 _fzf_opts_completion() {
@@ -49,57 +101,143 @@ _fzf_opts_completion() {
   cur="${COMP_WORDS[COMP_CWORD]}"
   prev="${COMP_WORDS[COMP_CWORD-1]}"
   opts="
-    -x --extended
-    -e --exact
-    --algo
-    -i +i
-    -n --nth
-    --with-nth
-    -d --delimiter
+    +c --no-color
+    +i --no-ignore-case
     +s --no-sort
-    --tac
-    --tiebreak
-    -m --multi
-    --no-mouse
-    --bind
-    --cycle
-    --no-hscroll
-    --jump-labels
-    --height
-    --literal
-    --reverse
-    --margin
-    --inline-info
-    --prompt
-    --header
-    --header-lines
+    +x --no-extended
     --ansi
-    --tabstop
+    --bash
+    --bind
+    --border
+    --border-label
+    --border-label-pos
     --color
-    --no-bold
+    --cycle
+    --disabled
+    --ellipsis
+    --expect
+    --filepath-word
+    --fish
+    --header
+    --header-first
+    --header-lines
+    --height
+    --highlight-line
     --history
     --history-size
+    --hscroll-off
+    --info
+    --jump-labels
+    --keep-right
+    --layout
+    --listen
+    --listen-unsafe
+    --literal
+    --man
+    --margin
+    --marker
+    --min-height
+    --no-bold
+    --no-clear
+    --no-hscroll
+    --no-mouse
+    --no-scrollbar
+    --no-separator
+    --no-unicode
+    --padding
+    --pointer
     --preview
+    --preview-label
+    --preview-label-pos
     --preview-window
-    -q --query
-    -1 --select-1
-    -0 --exit-0
-    -f --filter
     --print-query
-    --expect
-    --sync"
+    --print0
+    --prompt
+    --read0
+    --reverse
+    --scheme
+    --scroll-off
+    --separator
+    --sync
+    --tabstop
+    --tac
+    --tiebreak
+    --tmux
+    --track
+    --version
+    --with-nth
+    --with-shell
+    --wrap
+    --zsh
+    -0 --exit-0
+    -1 --select-1
+    -d --delimiter
+    -e --exact
+    -f --filter
+    -h --help
+    -i --ignore-case
+    -m --multi
+    -n --nth
+    -q --query
+    --"
 
   case "${prev}" in
+  --scheme)
+    COMPREPLY=( $(compgen -W "default path history" -- "$cur") )
+    return 0
+    ;;
   --tiebreak)
-    COMPREPLY=( $(compgen -W "length begin end index" -- "$cur") )
+    COMPREPLY=( $(compgen -W "length chunk begin end index" -- "$cur") )
     return 0
     ;;
   --color)
-    COMPREPLY=( $(compgen -W "dark light 16 bw" -- "$cur") )
+    COMPREPLY=( $(compgen -W "dark light 16 bw no" -- "$cur") )
     return 0
     ;;
-  --history)
-    COMPREPLY=()
+  --layout)
+    COMPREPLY=( $(compgen -W "default reverse reverse-list" -- "$cur") )
+    return 0
+    ;;
+  --info)
+    COMPREPLY=( $(compgen -W "default right hidden inline inline-right" -- "$cur") )
+    return 0
+    ;;
+  --preview-window)
+    COMPREPLY=( $(compgen -W "
+      default
+      hidden
+      nohidden
+      wrap
+      nowrap
+      cycle
+      nocycle
+      up top
+      down bottom
+      left
+      right
+      rounded border border-rounded
+      sharp border-sharp
+      border-bold
+      border-block
+      border-thinblock
+      border-double
+      noborder border-none
+      border-horizontal
+      border-vertical
+      border-up border-top
+      border-down border-bottom
+      border-left
+      border-right
+      follow
+      nofollow" -- "$cur") )
+    return 0
+    ;;
+  --border)
+    COMPREPLY=( $(compgen -W "rounded sharp bold block thinblock double horizontal vertical top bottom left right none" -- "$cur") )
+    return 0
+    ;;
+  --border-label-pos|--preview-label-pos)
+    COMPREPLY=( $(compgen -W "center bottom top" -- "$cur") )
     return 0
     ;;
   esac
@@ -113,46 +251,79 @@ _fzf_opts_completion() {
 }
 
 _fzf_handle_dynamic_completion() {
-  local cmd orig_var orig ret orig_cmd
+  local cmd ret REPLY orig_cmd orig_complete
   cmd="$1"
   shift
   orig_cmd="$1"
-  orig_var="_fzf_orig_completion_$cmd"
-  orig="${!orig_var##*#}"
-  if [ -n "$orig" ] && type "$orig" > /dev/null 2>&1; then
-    $orig "$@"
-  elif [ -n "$_fzf_completion_loader" ]; then
-    _completion_loader "$@"
+  if __fzf_orig_completion_get_orig_func "$cmd"; then
+    "$REPLY" "$@"
+  elif [[ -n "${_fzf_completion_loader-}" ]]; then
+    orig_complete=$(complete -p "$orig_cmd" 2> /dev/null)
+    $_fzf_completion_loader "$@"
     ret=$?
-    eval "$(complete | command grep "\-F.* $orig_cmd$" | _fzf_orig_completion_filter)"
-    source "${BASH_SOURCE[0]}"
+    # _completion_loader may not have updated completion for the command
+    if [[ "$(complete -p "$orig_cmd" 2> /dev/null)" != "$orig_complete" ]]; then
+      __fzf_orig_completion < <(complete -p "$orig_cmd" 2> /dev/null)
+      __fzf_orig_completion_get_orig_func "$cmd" || ret=1
+
+      # Update orig_complete by _fzf_orig_completion entry
+      [[ $orig_complete =~ ' -F '(_fzf_[^ ]+)' ' ]] &&
+        __fzf_orig_completion_instantiate "$cmd" "${BASH_REMATCH[1]}" &&
+        orig_complete=$REPLY
+
+      if [[ "${__fzf_nospace_commands-}" = *" $orig_cmd "* ]]; then
+        eval "${orig_complete/ -F / -o nospace -F }"
+      else
+        eval "$orig_complete"
+      fi
+    fi
+    [[ $ret -eq 0 ]] && return 124
     return $ret
   fi
 }
 
 __fzf_generic_path_completion() {
-  local cur base dir leftover matches trigger cmd fzf
-  fzf="$(__fzfcmd_complete)"
-  cmd="${COMP_WORDS[0]//[^A-Za-z0-9_=]/_}"
+  local cur base dir leftover matches trigger cmd
+  cmd="${COMP_WORDS[0]}"
+  if [[ $cmd == \\* ]]; then
+    cmd="${cmd:1}"
+  fi
   COMPREPLY=()
   trigger=${FZF_COMPLETION_TRIGGER-'**'}
-  cur="${COMP_WORDS[COMP_CWORD]}"
-  if [[ "$cur" == *"$trigger" ]]; then
+  [[ $COMP_CWORD -ge 0 ]] && cur="${COMP_WORDS[COMP_CWORD]}"
+  if [[ "$cur" == *"$trigger" ]] && [[ $cur != *'$('* ]] && [[ $cur != *':='* ]] && [[ $cur != *'`'* ]]; then
     base=${cur:0:${#cur}-${#trigger}}
-    eval "base=$base"
+    eval "base=$base" 2> /dev/null || return
 
-    dir="$base"
+    dir=
+    [[ $base = *"/"* ]] && dir="$base"
     while true; do
-      if [ -z "$dir" ] || [ -d "$dir" ]; then
+      if [[ -z "$dir" ]] || [[ -d "$dir" ]]; then
         leftover=${base/#"$dir"}
         leftover=${leftover/#\/}
-        [ -z "$dir" ] && dir='.'
-        [ "$dir" != "/" ] && dir="${dir/%\//}"
-        matches=$(eval "$1 $(printf %q "$dir")" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_COMPLETION_OPTS" $fzf $2 -q "$leftover" | while read -r item; do
-          printf "%q$3 " "$item"
-        done)
+        [[ -z "$dir" ]] && dir='.'
+        [[ "$dir" != "/" ]] && dir="${dir/%\//}"
+        matches=$(
+          export FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --scheme=path" "${FZF_COMPLETION_OPTS-} $2")
+          unset FZF_DEFAULT_COMMAND FZF_DEFAULT_OPTS_FILE
+          if declare -F "$1" > /dev/null; then
+            eval "$1 $(printf %q "$dir")" | __fzf_comprun "$4" -q "$leftover"
+          else
+            if [[ $1 =~ dir ]]; then
+              walker=dir,follow
+              eval "rest=(${FZF_COMPLETION_DIR_OPTS-})"
+            else
+              walker=file,dir,follow,hidden
+              eval "rest=(${FZF_COMPLETION_PATH_OPTS-})"
+            fi
+            __fzf_comprun "$4" -q "$leftover" --walker "$walker" --walker-root="$dir" "${rest[@]}"
+          fi | while read -r item; do
+            printf "%q " "${item%$3}$3"
+          done
+        )
         matches=${matches% }
-        if [ -n "$matches" ]; then
+        [[ -z "$3" ]] && [[ "${__fzf_nospace_commands-}" = *" ${COMP_WORDS[0]} "* ]] && matches="$matches "
+        if [[ -n "$matches" ]]; then
           COMPREPLY=( "$matches" )
         else
           COMPREPLY=( "$cur" )
@@ -160,7 +331,7 @@ __fzf_generic_path_completion() {
         printf '\e[5n'
         return 0
       fi
-      dir=$(dirname "$dir")
+      dir=$(command dirname "$dir")
       [[ "$dir" =~ /$ ]] || dir="$dir"/
     done
   else
@@ -172,28 +343,51 @@ __fzf_generic_path_completion() {
 }
 
 _fzf_complete() {
-  local cur selected trigger cmd fzf post
-  post="$(caller 0 | awk '{print $2}')_post"
-  type -t "$post" > /dev/null 2>&1 || post=cat
-  fzf="$(__fzfcmd_complete)"
+  # Split arguments around --
+  local args rest str_arg i sep
+  args=("$@")
+  sep=
+  for i in "${!args[@]}"; do
+    if [[ "${args[$i]}" = -- ]]; then
+      sep=$i
+      break
+    fi
+  done
+  if [[ -n "$sep" ]]; then
+    str_arg=
+    rest=("${args[@]:$((sep + 1)):${#args[@]}}")
+    args=("${args[@]:0:$sep}")
+  else
+    str_arg=$1
+    args=()
+    shift
+    rest=("$@")
+  fi
+
+  local cur selected trigger cmd post
+  post="$(caller 0 | command awk '{print $2}')_post"
+  type -t "$post" > /dev/null 2>&1 || post='command cat'
 
-  cmd="${COMP_WORDS[0]//[^A-Za-z0-9_=]/_}"
   trigger=${FZF_COMPLETION_TRIGGER-'**'}
+  cmd="${COMP_WORDS[0]}"
   cur="${COMP_WORDS[COMP_CWORD]}"
-  if [[ "$cur" == *"$trigger" ]]; then
+  if [[ "$cur" == *"$trigger" ]] && [[ $cur != *'$('* ]] && [[ $cur != *':='* ]] && [[ $cur != *'`'* ]]; then
     cur=${cur:0:${#cur}-${#trigger}}
 
-    selected=$(cat | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_COMPLETION_OPTS" $fzf $1 -q "$cur" | $post | tr '\n' ' ')
+    selected=$(
+      FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse" "${FZF_COMPLETION_OPTS-} $str_arg") \
+      FZF_DEFAULT_OPTS_FILE='' \
+        __fzf_comprun "${rest[0]}" "${args[@]}" -q "$cur" | eval "$post" | command tr '\n' ' ')
     selected=${selected% } # Strip trailing space not to repeat "-o nospace"
-    printf '\e[5n'
-
-    if [ -n "$selected" ]; then
+    if [[ -n "$selected" ]]; then
       COMPREPLY=("$selected")
-      return 0
+    else
+      COMPREPLY=("$cur")
     fi
+    printf '\e[5n'
+    return 0
   else
-    shift
-    _fzf_handle_dynamic_completion "$cmd" "$@"
+    _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
   fi
 }
 
@@ -211,87 +405,172 @@ _fzf_dir_completion() {
 }
 
 _fzf_complete_kill() {
-  [ -n "${COMP_WORDS[COMP_CWORD]}" ] && return 1
-
-  local selected fzf
-  fzf="$(__fzfcmd_complete)"
-  selected=$(ps -ef | sed 1d | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-50%} --min-height 15 --reverse $FZF_DEFAULT_OPTS --preview 'echo {}' --preview-window down:3:wrap $FZF_COMPLETION_OPTS" $fzf -m | awk '{print $2}' | tr '\n' ' ')
-  printf '\e[5n'
-
-  if [ -n "$selected" ]; then
-    COMPREPLY=( "$selected" )
-    return 0
-  fi
+  _fzf_proc_completion "$@"
 }
 
-_fzf_complete_telnet() {
-  _fzf_complete '+m' "$@" < <(
-    command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0' |
-        awk '{if (length($2) > 0) {print $2}}' | sort -u
+_fzf_proc_completion() {
+  local transformer
+  transformer='
+    if [[ $FZF_KEY =~ ctrl|alt|shift ]] && [[ -n $FZF_NTH ]]; then
+      nths=( ${FZF_NTH//,/ } )
+      new_nths=()
+      found=0
+      for nth in ${nths[@]}; do
+        if [[ $nth = $FZF_CLICK_HEADER_NTH ]]; then
+          found=1
+        else
+          new_nths+=($nth)
+        fi
+      done
+      [[ $found = 0 ]] && new_nths+=($FZF_CLICK_HEADER_NTH)
+      new_nths=${new_nths[*]}
+      new_nths=${new_nths// /,}
+      echo "change-nth($new_nths)+change-prompt($new_nths> )"
+    else
+      if [[ $FZF_NTH = $FZF_CLICK_HEADER_NTH ]]; then
+        echo "change-nth()+change-prompt(> )"
+      else
+        echo "change-nth($FZF_CLICK_HEADER_NTH)+change-prompt($FZF_CLICK_HEADER_WORD> )"
+      fi
+    fi
+  '
+  _fzf_complete -m --header-lines=1 --no-preview --wrap --color fg:dim,nth:regular \
+    --bind "click-header:transform:$transformer" -- "$@" < <(
+    command ps -eo user,pid,ppid,start,time,command 2> /dev/null ||
+      command ps -eo user,pid,ppid,time,args 2> /dev/null || # For BusyBox
+      command ps --everyone --full --windows # For cygwin
   )
 }
 
+_fzf_proc_completion_post() {
+  command awk '{print $2}'
+}
+
+# To use custom hostname lists, override __fzf_list_hosts.
+# The function is expected to print hostnames, one per line as well as in the
+# desired sorting and with any duplicates removed, to standard output.
+#
+# e.g.
+#   # Use bash-completions’s _known_hosts_real() for getting the list of hosts
+#   __fzf_list_hosts() {
+#     # Set the local attribute for any non-local variable that is set by _known_hosts_real()
+#     local COMPREPLY=()
+#     _known_hosts_real ''
+#     printf '%s\n' "${COMPREPLY[@]}" | command sort -u --version-sort
+#   }
+if ! declare -F __fzf_list_hosts > /dev/null; then
+  __fzf_list_hosts() {
+    command cat <(command tail -n +1 ~/.ssh/config ~/.ssh/config.d/* /etc/ssh/ssh_config 2> /dev/null | command grep -i '^\s*host\(name\)\? ' | command awk '{for (i = 2; i <= NF; i++) print $1 " " $i}' | command grep -v '[*?%]') \
+      <(command grep -oE '^[[a-z0-9.,:-]+' ~/.ssh/known_hosts 2> /dev/null | command tr ',' '\n' | command tr -d '[' | command awk '{ print $1 " " $1 }') \
+      <(command grep -v '^\s*\(#\|$\)' /etc/hosts 2> /dev/null | command grep -Fv '0.0.0.0' | command sed 's/#.*//') |
+      command awk '{for (i = 2; i <= NF; i++) print $i}' | command sort -u
+  }
+fi
+
+_fzf_host_completion() {
+  _fzf_complete +m -- "$@" < <(__fzf_list_hosts)
+}
+
+# Values for $1 $2 $3 are described here
+# https://www.gnu.org/software/bash/manual/html_node/Programmable-Completion.html
+# > the first argument ($1) is the name of the command whose arguments are being completed,
+# > the second argument ($2) is the word being completed,
+# > and the third argument ($3) is the word preceding the word being completed on the current command line.
 _fzf_complete_ssh() {
-  _fzf_complete '+m' "$@" < <(
-    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | command grep -i '^host' | command grep -v '*') \
-        <(command grep -oE '^[a-z0-9.,-]+' ~/.ssh/known_hosts | tr ',' '\n' | awk '{ print $1 " " $1 }') \
-        <(command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0') |
-        awk '{if (length($2) > 0) {print $2}}' | sort -u
+  case $3 in
+    -i|-F|-E)
+      _fzf_path_completion "$@"
+      ;;
+    *)
+      local user=
+      [[ "$2" =~ '@' ]] && user="${2%%@*}@"
+      _fzf_complete +m -- "$@" < <(__fzf_list_hosts | command awk -v user="$user" '{print user $0}')
+      ;;
+  esac
+}
+
+_fzf_var_completion() {
+  _fzf_complete -m -- "$@" < <(
+    declare -xp | command sed -En 's|^declare [^ ]+ ([^=]+).*|\1|p'
   )
 }
 
-_fzf_complete_unset() {
-  _fzf_complete '-m' "$@" < <(
-    declare -xp | sed 's/=.*//' | sed 's/.* //'
-  )
-}
-
-_fzf_complete_export() {
-  _fzf_complete '-m' "$@" < <(
-    declare -xp | sed 's/=.*//' | sed 's/.* //'
-  )
-}
-
-_fzf_complete_unalias() {
-  _fzf_complete '-m' "$@" < <(
-    alias | sed 's/=.*//' | sed 's/.* //'
+_fzf_alias_completion() {
+  _fzf_complete -m -- "$@" < <(
+    alias | command sed -En 's|^alias ([^=]+).*|\1|p'
   )
 }
 
 # fzf options
 complete -o default -F _fzf_opts_completion fzf
+# fzf-tmux is a thin fzf wrapper that has only a few more options than fzf
+# itself. As a quick improvement we take fzf's completion. Adding the few extra
+# fzf-tmux specific options (like `-w WIDTH`) are left as a future patch.
+complete -o default -F _fzf_opts_completion fzf-tmux
 
-d_cmds="${FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir}"
-a_cmds="
-  awk cat diff diff3
-  emacs emacsclient ex file ftp g++ gcc gvim head hg java
+# Default path completion
+__fzf_default_completion() {
+  __fzf_generic_path_completion _fzf_compgen_path "-m" "" "$@"
+
+  # Dynamic completion loader has updated the completion for the command
+  if [[ $? -eq 124 ]]; then
+    # We trigger _fzf_setup_completion so that fuzzy completion for the command
+    # still works. However, loader can update the completion for multiple
+    # commands at once, and fuzzy completion will no longer work for those
+    # other commands. e.g. pytest -> py.test, pytest-2, pytest-3, etc
+    _fzf_setup_completion path "$1"
+    return 124
+  fi
+}
+
+# Set fuzzy path completion as the default completion for all commands.
+# We can't set up default completion,
+# 1. if it's already set up by another script
+# 2. or if the current version of bash doesn't support -D option
+complete | command grep -q __fzf_default_completion ||
+  complete | command grep -- '-D$' | command grep -qv _comp_complete_load ||
+  complete -D -F __fzf_default_completion -o default -o bashdefault 2> /dev/null
+
+d_cmds="${FZF_COMPLETION_DIR_COMMANDS-cd pushd rmdir}"
+
+# NOTE: $FZF_COMPLETION_PATH_COMMANDS and $FZF_COMPLETION_VAR_COMMANDS are
+# undocumented and subject to change in the future.
+#
+# NOTE: Although we have default completion, we still need to set up completion
+# for each command in case they already have completion set up by another script.
+a_cmds="${FZF_COMPLETION_PATH_COMMANDS-"
+  awk bat cat code diff diff3
+  emacs emacsclient ex file ftp g++ gcc gvim head hg hx java
   javac ld less more mvim nvim patch perl python ruby
   sed sftp sort source tail tee uniq vi view vim wc xdg-open
   basename bunzip2 bzip2 chmod chown curl cp dirname du
   find git grep gunzip gzip hg jar
   ln ls mv open rm rsync scp
-  svn tar unzip zip"
-x_cmds="kill ssh telnet unset unalias export"
+  svn tar unzip zip"}"
+v_cmds="${FZF_COMPLETION_VAR_COMMANDS-export unset printenv}"
 
 # Preserve existing completion
-eval $(complete |
-  sed -E '/-F/!d; / _fzf/d; '"/ ($(echo $d_cmds $a_cmds $x_cmds | sed 's/ /|/g; s/+/\\+/g'))$/"'!d' |
-  _fzf_orig_completion_filter)
+__fzf_orig_completion < <(complete -p $d_cmds $a_cmds $v_cmds unalias kill ssh 2> /dev/null)
 
-if type _completion_loader > /dev/null 2>&1; then
-  _fzf_completion_loader=1
+if type _comp_load > /dev/null 2>&1; then
+  # _comp_load was added in bash-completion 2.12 to replace _completion_loader.
+  # We use it without -D option so that it does not use _comp_complete_minimal as the fallback.
+  _fzf_completion_loader=_comp_load
+elif type __load_completion > /dev/null 2>&1; then
+  # In bash-completion 2.11, _completion_loader internally calls __load_completion
+  # and if it returns a non-zero status, it sets the default 'minimal' completion.
+  _fzf_completion_loader=__load_completion
+elif type _completion_loader > /dev/null 2>&1; then
+  _fzf_completion_loader=_completion_loader
 fi
 
-_fzf_defc() {
-  local cmd func opts orig_var orig def
+__fzf_defc() {
+  local cmd func opts REPLY
   cmd="$1"
   func="$2"
   opts="$3"
-  orig_var="_fzf_orig_completion_${cmd//[^A-Za-z0-9_]/_}"
-  orig="${!orig_var}"
-  if [ -n "$orig" ]; then
-    printf -v def "$orig" "$func"
-    eval "$def"
+  if __fzf_orig_completion_instantiate "$cmd" "$func"; then
+    eval "$REPLY"
   else
     complete -F "$func" $opts "$cmd"
   fi
@@ -299,26 +578,48 @@ _fzf_defc() {
 
 # Anything
 for cmd in $a_cmds; do
-  _fzf_defc "$cmd" _fzf_path_completion "-o default -o bashdefault"
+  __fzf_defc "$cmd" _fzf_path_completion "-o default -o bashdefault"
 done
 
 # Directory
 for cmd in $d_cmds; do
-  _fzf_defc "$cmd" _fzf_dir_completion "-o nospace -o plusdirs"
+  __fzf_defc "$cmd" _fzf_dir_completion "-o bashdefault -o nospace -o dirnames"
 done
 
-unset _fzf_defc
+# Variables
+for cmd in $v_cmds; do
+  __fzf_defc "$cmd" _fzf_var_completion "-o default -o nospace -v"
+done
 
-# Kill completion
-complete -F _fzf_complete_kill -o nospace -o default -o bashdefault kill
+# Aliases
+__fzf_defc unalias _fzf_alias_completion "-a"
 
-# Host completion
-complete -F _fzf_complete_ssh -o default -o bashdefault ssh
-complete -F _fzf_complete_telnet -o default -o bashdefault telnet
+# Processes
+__fzf_defc kill _fzf_proc_completion "-o default -o bashdefault"
 
-# Environment variables / Aliases
-complete -F _fzf_complete_unset -o default -o bashdefault unset
-complete -F _fzf_complete_export -o default -o bashdefault export
-complete -F _fzf_complete_unalias -o default -o bashdefault unalias
+# ssh
+__fzf_defc ssh _fzf_complete_ssh "-o default -o bashdefault"
 
-unset cmd d_cmds a_cmds x_cmds
+unset cmd d_cmds a_cmds v_cmds
+
+_fzf_setup_completion() {
+  local kind fn cmd
+  kind=$1
+  fn=_fzf_${1}_completion
+  if [[ $# -lt 2 ]] || ! type -t "$fn" > /dev/null; then
+    echo "usage: ${FUNCNAME[0]} path|dir|var|alias|host|proc COMMANDS..."
+    return 1
+  fi
+  shift
+  __fzf_orig_completion < <(complete -p "$@" 2> /dev/null)
+  for cmd in "$@"; do
+    case "$kind" in
+      dir)   __fzf_defc "$cmd" "$fn" "-o nospace -o dirnames" ;;
+      var)   __fzf_defc "$cmd" "$fn" "-o default -o nospace -v" ;;
+      alias) __fzf_defc "$cmd" "$fn" "-a" ;;
+      *)     __fzf_defc "$cmd" "$fn" "-o default -o bashdefault" ;;
+    esac
+  done
+}
+
+fi

shell/completion.zsh

@@ -1,69 +1,179 @@
-#!/bin/zsh
 #     ____      ____
 #    / __/___  / __/
 #   / /_/_  / / /_
 #  / __/ / /_/ __/
-# /_/   /___/_/-completion.zsh
+# /_/   /___/_/ completion.zsh
 #
-# - $FZF_TMUX               (default: 0)
-# - $FZF_TMUX_HEIGHT        (default: '40%')
-# - $FZF_COMPLETION_TRIGGER (default: '**')
-# - $FZF_COMPLETION_OPTS    (default: empty)
+# - $FZF_TMUX                 (default: 0)
+# - $FZF_TMUX_OPTS            (default: empty)
+# - $FZF_COMPLETION_TRIGGER   (default: '**')
+# - $FZF_COMPLETION_OPTS      (default: empty)
+# - $FZF_COMPLETION_PATH_OPTS (default: empty)
+# - $FZF_COMPLETION_DIR_OPTS  (default: empty)
+
+
+# Both branches of the following `if` do the same thing -- define
+# __fzf_completion_options such that `eval $__fzf_completion_options` sets
+# all options to the same values they currently have. We'll do just that at
+# the bottom of the file after changing options to what we prefer.
+#
+# IMPORTANT: Until we get to the `emulate` line, all words that *can* be quoted
+# *must* be quoted in order to prevent alias expansion. In addition, code must
+# be written in a way works with any set of zsh options. This is very tricky, so
+# careful when you change it.
+#
+# Start by loading the builtin zsh/parameter module. It provides `options`
+# associative array that stores current shell options.
+if 'zmodload' 'zsh/parameter' 2>'/dev/null' && (( ${+options} )); then
+  # This is the fast branch and it gets taken on virtually all Zsh installations.
+  #
+  # ${(kv)options[@]} expands to array of keys (option names) and values ("on"
+  # or "off"). The subsequent expansion# with (j: :) flag joins all elements
+  # together separated by spaces. __fzf_completion_options ends up with a value
+  # like this: "options=(shwordsplit off aliases on ...)".
+  __fzf_completion_options="options=(${(j: :)${(kv)options[@]}})"
+else
+  # This branch is much slower because it forks to get the names of all
+  # zsh options. It's possible to eliminate this fork but it's not worth the
+  # trouble because this branch gets taken only on very ancient or broken
+  # zsh installations.
+  () {
+    # That `()` above defines an anonymous function. This is essentially a scope
+    # for local parameters. We use it to avoid polluting global scope.
+    'local' '__fzf_opt'
+    __fzf_completion_options="setopt"
+    # `set -o` prints one line for every zsh option. Each line contains option
+    # name, some spaces, and then either "on" or "off". We just want option names.
+    # Expansion with (@f) flag splits a string into lines. The outer expansion
+    # removes spaces and everything that follow them on every line. __fzf_opt
+    # ends up iterating over option names: shwordsplit, aliases, etc.
+    for __fzf_opt in "${(@)${(@f)$(set -o)}%% *}"; do
+      if [[ -o "$__fzf_opt" ]]; then
+        # Option $__fzf_opt is currently on, so remember to set it back on.
+        __fzf_completion_options+=" -o $__fzf_opt"
+      else
+        # Option $__fzf_opt is currently off, so remember to set it back off.
+        __fzf_completion_options+=" +o $__fzf_opt"
+      fi
+    done
+    # The value of __fzf_completion_options here looks like this:
+    # "setopt +o shwordsplit -o aliases ..."
+  }
+fi
+
+# Enable the default zsh options (those marked with <Z> in `man zshoptions`)
+# but without `aliases`. Aliases in functions are expanded when functions are
+# defined, so if we disable aliases here, we'll be sure to have no pesky
+# aliases in any of our functions. This way we won't need prefix every
+# command with `command` or to quote every word to defend against global
+# aliases. Note that `aliases` is not the only option that's important to
+# control. There are several others that could wreck havoc if they are set
+# to values we don't expect. With the following `emulate` command we
+# sidestep this issue entirely.
+'builtin' 'emulate' 'zsh' && 'builtin' 'setopt' 'no_aliases'
+
+# This brace is the start of try-always block. The `always` part is like
+# `finally` in lesser languages. We use it to *always* restore user options.
+{
+# The 'emulate' command should not be placed inside the interactive if check;
+# placing it there fails to disable alias expansion. See #3731.
+if [[ -o interactive ]]; then
 
 # To use custom commands instead of find, override _fzf_compgen_{path,dir}
-if ! declare -f _fzf_compgen_path > /dev/null; then
-  _fzf_compgen_path() {
-    echo "$1"
-    command find -L "$1" \
-      -name .git -prune -o -name .svn -prune -o \( -type d -o -type f -o -type l \) \
-      -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
-  }
-fi
-
-if ! declare -f _fzf_compgen_dir > /dev/null; then
-  _fzf_compgen_dir() {
-    command find -L "$1" \
-      -name .git -prune -o -name .svn -prune -o -type d \
-      -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
-  }
-fi
+#
+#   _fzf_compgen_path() {
+#     echo "$1"
+#     command find -L "$1" \
+#       -name .git -prune -o -name .hg -prune -o -name .svn -prune -o \( -type d -o -type f -o -type l \) \
+#       -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
+#   }
+#
+#   _fzf_compgen_dir() {
+#     command find -L "$1" \
+#       -name .git -prune -o -name .hg -prune -o -name .svn -prune -o -type d \
+#       -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
+#   }
 
 ###########################################################
 
-__fzfcmd_complete() {
-  [ -n "$TMUX_PANE" ] && [ "${FZF_TMUX:-0}" != 0 ] && [ ${LINES:-40} -gt 15 ] &&
-    echo "fzf-tmux -d${FZF_TMUX_HEIGHT:-40%}" || echo "fzf"
+__fzf_defaults() {
+  # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  echo -E "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo -E "${FZF_DEFAULT_OPTS-} $2"
+}
+
+__fzf_comprun() {
+  if [[ "$(type _fzf_comprun 2>&1)" =~ function ]]; then
+    _fzf_comprun "$@"
+  elif [ -n "${TMUX_PANE-}" ] && { [ "${FZF_TMUX:-0}" != 0 ] || [ -n "${FZF_TMUX_OPTS-}" ]; }; then
+    shift
+    if [ -n "${FZF_TMUX_OPTS-}" ]; then
+      fzf-tmux ${(Q)${(Z+n+)FZF_TMUX_OPTS}} -- "$@"
+    else
+      fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%} -- "$@"
+    fi
+  else
+    shift
+    fzf "$@"
+  fi
+}
+
+# Extract the name of the command. e.g. ls; foo=1 ssh **<tab>
+__fzf_extract_command() {
+  # Control completion with the "compstate" parameter, insert and list nothing
+  compstate[insert]=
+  compstate[list]=
+  cmd_word="${(Q)words[1]}"
 }
 
 __fzf_generic_path_completion() {
-  local base lbuf compgen fzf_opts suffix tail fzf dir leftover matches
-  # (Q) flag removes a quoting level: "foo\ bar" => "foo bar"
-  base=${(Q)1}
+  local base lbuf compgen fzf_opts suffix tail dir leftover matches
+  base=$1
   lbuf=$2
   compgen=$3
   fzf_opts=$4
   suffix=$5
   tail=$6
-  fzf="$(__fzfcmd_complete)"
 
   setopt localoptions nonomatch
-  dir="$base"
+  if [[ $base = *'$('* ]] || [[ $base = *'<('* ]] || [[ $base = *'>('* ]] || [[ $base = *':='* ]] || [[ $base = *'`'* ]]; then
+    return
+  fi
+  eval "base=$base" 2> /dev/null || return
+  [[ $base = *"/"* ]] && dir="$base"
   while [ 1 ]; do
-    if [[ -z "$dir" || -d ${~dir} ]]; then
+    if [[ -z "$dir" || -d ${dir} ]]; then
       leftover=${base/#"$dir"}
       leftover=${leftover/#\/}
       [ -z "$dir" ] && dir='.'
       [ "$dir" != "/" ] && dir="${dir/%\//}"
-      dir=${~dir}
-      matches=$(eval "$compgen $(printf %q "$dir")" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_COMPLETION_OPTS" ${=fzf} ${=fzf_opts} -q "$leftover" | while read item; do
-        echo -n "${(q)item}$suffix "
-      done)
+      matches=$(
+        export FZF_DEFAULT_OPTS
+        FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --scheme=path" "${FZF_COMPLETION_OPTS-}")
+        unset FZF_DEFAULT_COMMAND FZF_DEFAULT_OPTS_FILE
+        if declare -f "$compgen" > /dev/null; then
+          eval "$compgen $(printf %q "$dir")" | __fzf_comprun "$cmd_word" ${(Q)${(Z+n+)fzf_opts}} -q "$leftover"
+        else
+          if [[ $compgen =~ dir ]]; then
+            walker=dir,follow
+            rest=${FZF_COMPLETION_DIR_OPTS-}
+          else
+            walker=file,dir,follow,hidden
+            rest=${FZF_COMPLETION_PATH_OPTS-}
+          fi
+          __fzf_comprun "$cmd_word" ${(Q)${(Z+n+)fzf_opts}} -q "$leftover" --walker "$walker" --walker-root="$dir" ${(Q)${(Z+n+)rest}} < /dev/tty
+        fi | while read -r item; do
+          item="${item%$suffix}$suffix"
+          echo -n -E "${(q)item} "
+        done
+      )
       matches=${matches% }
       if [ -n "$matches" ]; then
         LBUFFER="$lbuf$matches$tail"
       fi
-      zle redisplay
-      typeset -f zle-line-init >/dev/null && zle zle-line-init
+      zle reset-prompt
       break
     fi
     dir=$(dirname "$dir")
@@ -81,69 +191,145 @@ _fzf_dir_completion() {
     "" "/" ""
 }
 
-_fzf_feed_fifo() (
+_fzf_feed_fifo() {
   command rm -f "$1"
   mkfifo "$1"
-  cat <&0 > "$1" &
-)
+  cat <&0 > "$1" &|
+}
 
 _fzf_complete() {
-  local fifo fzf_opts lbuf fzf matches post
+  setopt localoptions ksh_arrays
+  # Split arguments around --
+  local args rest str_arg i sep
+  args=("$@")
+  sep=
+  for i in {0..${#args[@]}}; do
+    if [[ "${args[$i]-}" = -- ]]; then
+      sep=$i
+      break
+    fi
+  done
+  if [[ -n "$sep" ]]; then
+    str_arg=
+    rest=("${args[@]:$((sep + 1)):${#args[@]}}")
+    args=("${args[@]:0:$sep}")
+  else
+    str_arg=$1
+    args=()
+    shift
+    rest=("$@")
+  fi
+
+  local fifo lbuf matches post
   fifo="${TMPDIR:-/tmp}/fzf-complete-fifo-$$"
-  fzf_opts=$1
-  lbuf=$2
-  post="${funcstack[2]}_post"
+  lbuf=${rest[0]}
+  post="${funcstack[1]}_post"
   type $post > /dev/null 2>&1 || post=cat
 
-  fzf="$(__fzfcmd_complete)"
-
   _fzf_feed_fifo "$fifo"
-  matches=$(cat "$fifo" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_COMPLETION_OPTS" ${=fzf} ${=fzf_opts} -q "${(Q)prefix}" | $post | tr '\n' ' ')
+  matches=$(
+    FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse" "${FZF_COMPLETION_OPTS-} $str_arg") \
+    FZF_DEFAULT_OPTS_FILE='' \
+      __fzf_comprun "$cmd_word" "${args[@]}" -q "${(Q)prefix}" < "$fifo" | $post | tr '\n' ' ')
   if [ -n "$matches" ]; then
     LBUFFER="$lbuf$matches"
   fi
-  zle redisplay
-  typeset -f zle-line-init >/dev/null && zle zle-line-init
   command rm -f "$fifo"
 }
 
+# To use custom hostname lists, override __fzf_list_hosts.
+# The function is expected to print hostnames, one per line as well as in the
+# desired sorting and with any duplicates removed, to standard output.
+if ! declare -f __fzf_list_hosts > /dev/null; then
+  __fzf_list_hosts() {
+    setopt localoptions nonomatch
+    command cat <(command tail -n +1 ~/.ssh/config ~/.ssh/config.d/* /etc/ssh/ssh_config 2> /dev/null | command grep -i '^\s*host\(name\)\? ' | awk '{for (i = 2; i <= NF; i++) print $1 " " $i}' | command grep -v '[*?%]') \
+      <(command grep -oE '^[[a-z0-9.,:-]+' ~/.ssh/known_hosts 2> /dev/null | tr ',' '\n' | tr -d '[' | awk '{ print $1 " " $1 }') \
+      <(command grep -v '^\s*\(#\|$\)' /etc/hosts 2> /dev/null | command grep -Fv '0.0.0.0' | command sed 's/#.*//') |
+      awk '{for (i = 2; i <= NF; i++) print $i}' | sort -u
+  }
+fi
+
 _fzf_complete_telnet() {
-  _fzf_complete '+m' "$@" < <(
-    command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0' |
-        awk '{if (length($2) > 0) {print $2}}' | sort -u
-  )
+  _fzf_complete +m -- "$@" < <(__fzf_list_hosts)
 }
 
+# The first and the only argument is the LBUFFER without the current word that contains the trigger.
+# The current word without the trigger is in the $prefix variable passed from the caller.
 _fzf_complete_ssh() {
-  _fzf_complete '+m' "$@" < <(
-    command cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | command grep -i '^host' | command grep -v '*') \
-        <(command grep -oE '^[a-z0-9.,-]+' ~/.ssh/known_hosts | tr ',' '\n' | awk '{ print $1 " " $1 }') \
-        <(command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0') |
-        awk '{if (length($2) > 0) {print $2}}' | sort -u
-  )
+  local -a tokens
+  tokens=(${(z)1})
+  case ${tokens[-1]} in
+    -i|-F|-E)
+      _fzf_path_completion "$prefix" "$1"
+      ;;
+    *)
+      local user
+      [[ $prefix =~ @ ]] && user="${prefix%%@*}@"
+      _fzf_complete +m -- "$@" < <(__fzf_list_hosts | awk -v user="$user" '{print user $0}')
+      ;;
+  esac
 }
 
 _fzf_complete_export() {
-  _fzf_complete '-m' "$@" < <(
+  _fzf_complete -m -- "$@" < <(
     declare -xp | sed 's/=.*//' | sed 's/.* //'
   )
 }
 
 _fzf_complete_unset() {
-  _fzf_complete '-m' "$@" < <(
+  _fzf_complete -m -- "$@" < <(
     declare -xp | sed 's/=.*//' | sed 's/.* //'
   )
 }
 
 _fzf_complete_unalias() {
-  _fzf_complete '+m' "$@" < <(
+  _fzf_complete +m -- "$@" < <(
     alias | sed 's/=.*//'
   )
 }
 
+_fzf_complete_kill() {
+  local transformer
+  transformer='
+    if [[ $FZF_KEY =~ ctrl|alt|shift ]] && [[ -n $FZF_NTH ]]; then
+      nths=( ${FZF_NTH//,/ } )
+      new_nths=()
+      found=0
+      for nth in ${nths[@]}; do
+        if [[ $nth = $FZF_CLICK_HEADER_NTH ]]; then
+          found=1
+        else
+          new_nths+=($nth)
+        fi
+      done
+      [[ $found = 0 ]] && new_nths+=($FZF_CLICK_HEADER_NTH)
+      new_nths=${new_nths[*]}
+      new_nths=${new_nths// /,}
+      echo "change-nth($new_nths)+change-prompt($new_nths> )"
+    else
+      if [[ $FZF_NTH = $FZF_CLICK_HEADER_NTH ]]; then
+        echo "change-nth()+change-prompt(> )"
+      else
+        echo "change-nth($FZF_CLICK_HEADER_NTH)+change-prompt($FZF_CLICK_HEADER_WORD> )"
+      fi
+    fi
+  '
+  _fzf_complete -m --header-lines=1 --no-preview --wrap --color fg:dim,nth:regular \
+    --bind "click-header:transform:$transformer" -- "$@" < <(
+    command ps -eo user,pid,ppid,start,time,command 2> /dev/null ||
+      command ps -eo user,pid,ppid,time,args 2> /dev/null || # For BusyBox
+      command ps --everyone --full --windows # For cygwin
+  )
+}
+
+_fzf_complete_kill_post() {
+  awk '{print $2}'
+}
+
 fzf-completion() {
-  local tokens cmd prefix trigger tail fzf matches lbuf d_cmds
-  setopt localoptions noshwordsplit noksh_arrays
+  local tokens prefix trigger tail matches lbuf d_cmds cursor_pos cmd_word
+  setopt localoptions noshwordsplit noksh_arrays noposixbuiltins
 
   # http://zsh.sourceforge.net/FAQ/zshfaq03.html
   # http://zsh.sourceforge.net/Doc/Release/Expansion.html#Parameter-Expansion-Flags
@@ -153,32 +339,54 @@ fzf-completion() {
     return
   fi
 
-  cmd=${tokens[1]}
-
   # Explicitly allow for empty trigger.
   trigger=${FZF_COMPLETION_TRIGGER-'**'}
-  [ -z "$trigger" -a ${LBUFFER[-1]} = ' ' ] && tokens+=("")
+  [[ -z $trigger && ${LBUFFER[-1]} == ' ' ]] && tokens+=("")
 
+  # When the trigger starts with ';', it becomes a separate token
+  if [[ ${LBUFFER} = *"${tokens[-2]-}${tokens[-1]}" ]]; then
+    tokens[-2]="${tokens[-2]-}${tokens[-1]}"
+    tokens=(${tokens[0,-2]})
+  fi
+
+  lbuf=$LBUFFER
   tail=${LBUFFER:$(( ${#LBUFFER} - ${#trigger} ))}
-  # Kill completion (do not require trigger sequence)
-  if [ $cmd = kill -a ${LBUFFER[-1]} = ' ' ]; then
-    fzf="$(__fzfcmd_complete)"
-    matches=$(ps -ef | sed 1d | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-50%} --min-height 15 --reverse $FZF_DEFAULT_OPTS --preview 'echo {}' --preview-window down:3:wrap $FZF_COMPLETION_OPTS" ${=fzf} -m | awk '{print $2}' | tr '\n' ' ')
-    if [ -n "$matches" ]; then
-      LBUFFER="$LBUFFER$matches"
-    fi
-    zle redisplay
-    typeset -f zle-line-init >/dev/null && zle zle-line-init
+
   # Trigger sequence given
-  elif [ ${#tokens} -gt 1 -a "$tail" = "$trigger" ]; then
-    d_cmds=(${=FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir})
+  if [ ${#tokens} -gt 1 -a "$tail" = "$trigger" ]; then
+    d_cmds=(${=FZF_COMPLETION_DIR_COMMANDS-cd pushd rmdir})
+
+    {
+      cursor_pos=$CURSOR
+      # Move the cursor before the trigger to preserve word array elements when
+      # trigger chars like ';' or '`' would otherwise reset the 'words' array.
+      CURSOR=$((cursor_pos - ${#trigger} - 1))
+      # Check if at least one completion system (old or new) is active.
+      # If at least one user-defined completion widget is detected, nothing will
+      # be completed if neither the old nor the new completion system is enabled.
+      # In such cases, the 'zsh/compctl' module is loaded as a fallback.
+      if ! zmodload -F zsh/parameter p:functions 2>/dev/null || ! (( ${+functions[compdef]} )); then
+        zmodload -F zsh/compctl 2>/dev/null
+      fi
+      # Create a completion widget to access the 'words' array (man zshcompwid)
+      zle -C __fzf_extract_command .complete-word __fzf_extract_command
+      zle __fzf_extract_command
+    } always {
+      CURSOR=$cursor_pos
+      # Delete the completion widget
+      zle -D __fzf_extract_command  2>/dev/null
+    }
 
     [ -z "$trigger"      ] && prefix=${tokens[-1]} || prefix=${tokens[-1]:0:-${#trigger}}
-    [ -z "${tokens[-1]}" ] && lbuf=$LBUFFER        || lbuf=${LBUFFER:0:-${#tokens[-1]}}
+    if [[ $prefix = *'$('* ]] || [[ $prefix = *'<('* ]] || [[ $prefix = *'>('* ]] || [[ $prefix = *':='* ]] || [[ $prefix = *'`'* ]]; then
+      return
+    fi
+    [ -n "${tokens[-1]}" ] && lbuf=${lbuf:0:-${#tokens[-1]}}
 
-    if eval "type _fzf_complete_${cmd} > /dev/null"; then
-      eval "prefix=\"$prefix\" _fzf_complete_${cmd} \"$lbuf\""
-    elif [ ${d_cmds[(i)$cmd]} -le ${#d_cmds} ]; then
+    if eval "noglob type _fzf_complete_${cmd_word} >/dev/null"; then
+      prefix="$prefix" eval _fzf_complete_${cmd_word} ${(q)lbuf}
+      zle reset-prompt
+    elif [ ${d_cmds[(i)$cmd_word]} -le ${#d_cmds} ]; then
       _fzf_dir_completion "$prefix" "$lbuf"
     else
       _fzf_path_completion "$prefix" "$lbuf"
@@ -195,5 +403,13 @@ fzf-completion() {
   unset binding
 }
 
+# Normal widget
 zle     -N   fzf-completion
 bindkey '^I' fzf-completion
+fi
+
+} always {
+  # Restore the original options.
+  eval $__fzf_completion_options
+  'unset' '__fzf_completion_options'
+}

shell/key-bindings.bash

@@ -1,121 +1,146 @@
-# Key bindings
-# ------------
-__fzf_select__() {
-  local cmd="${FZF_CTRL_T_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/\\.*' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
-    -o -type f -print \
-    -o -type d -print \
-    -o -type l -print 2> /dev/null | cut -b3-"}"
-  eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS" fzf -m "$@" | while read -r item; do
-    printf '%q ' "$item"
-  done
-  echo
-}
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ key-bindings.bash
+#
+# - $FZF_TMUX_OPTS
+# - $FZF_CTRL_T_COMMAND
+# - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_OPTS
+# - $FZF_ALT_C_COMMAND
+# - $FZF_ALT_C_OPTS
 
 if [[ $- =~ i ]]; then
 
-__fzf_use_tmux__() {
-  [ -n "$TMUX_PANE" ] && [ "${FZF_TMUX:-0}" != 0 ] && [ ${LINES:-40} -gt 15 ]
+
+# Key bindings
+# ------------
+
+__fzf_defaults() {
+  # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  echo "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo "${FZF_DEFAULT_OPTS-} $2"
+}
+
+__fzf_select__() {
+  FZF_DEFAULT_COMMAND=${FZF_CTRL_T_COMMAND:-} \
+  FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --walker=file,dir,follow,hidden --scheme=path" "${FZF_CTRL_T_OPTS-} -m") \
+  FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) "$@" |
+    while read -r item; do
+      printf '%q ' "$item"  # escape special chars
+    done
 }
 
 __fzfcmd() {
-  __fzf_use_tmux__ &&
-    echo "fzf-tmux -d${FZF_TMUX_HEIGHT:-40%}" || echo "fzf"
-}
-
-__fzf_select_tmux__() {
-  local height
-  height=${FZF_TMUX_HEIGHT:-40%}
-  if [[ $height =~ %$ ]]; then
-    height="-p ${height%\%}"
-  else
-    height="-l $height"
-  fi
-
-  tmux split-window $height "cd $(printf %q "$PWD"); FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS") PATH=$(printf %q "$PATH") FZF_CTRL_T_COMMAND=$(printf %q "$FZF_CTRL_T_COMMAND") FZF_CTRL_T_OPTS=$(printf %q "$FZF_CTRL_T_OPTS") bash -c 'source \"${BASH_SOURCE[0]}\"; RESULT=\"\$(__fzf_select__ --no-height)\"; tmux setb -b fzf \"\$RESULT\" \\; pasteb -b fzf -t $TMUX_PANE \\; deleteb -b fzf || tmux send-keys -t $TMUX_PANE \"\$RESULT\"'"
+  [[ -n "${TMUX_PANE-}" ]] && { [[ "${FZF_TMUX:-0}" != 0 ]] || [[ -n "${FZF_TMUX_OPTS-}" ]]; } &&
+    echo "fzf-tmux ${FZF_TMUX_OPTS:--d${FZF_TMUX_HEIGHT:-40%}} -- " || echo "fzf"
 }
 
 fzf-file-widget() {
-  if __fzf_use_tmux__; then
-    __fzf_select_tmux__
-  else
-    local selected="$(__fzf_select__)"
-    READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}$selected${READLINE_LINE:$READLINE_POINT}"
-    READLINE_POINT=$(( READLINE_POINT + ${#selected} ))
-  fi
+  local selected="$(__fzf_select__ "$@")"
+  READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}$selected${READLINE_LINE:$READLINE_POINT}"
+  READLINE_POINT=$(( READLINE_POINT + ${#selected} ))
 }
 
 __fzf_cd__() {
-  local cmd dir
-  cmd="${FZF_ALT_C_COMMAND:-"command find -L . \\( -path '*/\\.*' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
-    -o -type d -print 2> /dev/null | sed 1d | cut -b3-"}"
-  dir=$(eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS" $(__fzfcmd) +m) && printf 'cd %q' "$dir"
+  local dir
+  dir=$(
+    FZF_DEFAULT_COMMAND=${FZF_ALT_C_COMMAND:-} \
+    FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --walker=dir,follow,hidden --scheme=path" "${FZF_ALT_C_OPTS-} +m") \
+    FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd)
+  ) && printf 'builtin cd -- %q' "$(builtin unset CDPATH && builtin cd -- "$dir" && builtin pwd)"
 }
 
-__fzf_history__() (
-  local line
-  shopt -u nocaseglob nocasematch
-  line=$(
-    HISTTIMEFORMAT= history |
-    FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS +s --tac --no-reverse -n2..,.. --tiebreak=index --toggle-sort=ctrl-r $FZF_CTRL_R_OPTS +m" $(__fzfcmd) |
-    command grep '^ *[0-9]') &&
-    if [[ $- =~ H ]]; then
-      sed 's/^ *\([0-9]*\)\** .*/!\1/' <<< "$line"
+if command -v perl > /dev/null; then
+  __fzf_history__() {
+    local output script
+    script='BEGIN { getc; $/ = "\n\t"; $HISTCOUNT = $ENV{last_hist} + 1 } s/^[ *]//; s/\n/\n\t/gm; print $HISTCOUNT - $. . "\t$_" if !$seen{$_}++'
+    output=$(
+      set +o pipefail
+      builtin fc -lnr -2147483648 |
+        last_hist=$(HISTTIMEFORMAT='' builtin history 1) command perl -n -l0 -e "$script" |
+        FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --wrap-sign '"$'\t'"↳ ' --highlight-line ${FZF_CTRL_R_OPTS-} +m --read0") \
+        FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) --query "$READLINE_LINE"
+    ) || return
+    READLINE_LINE=$(command perl -pe 's/^\d*\t//' <<< "$output")
+    if [[ -z "$READLINE_POINT" ]]; then
+      echo "$READLINE_LINE"
     else
-      sed 's/^ *\([0-9]*\)\** *//' <<< "$line"
+      READLINE_POINT=0x7fffffff
     fi
-)
+  }
+else # awk - fallback for POSIX systems
+  __fzf_history__() {
+    local output script n x y z d
+    if [[ -z $__fzf_awk ]]; then
+      __fzf_awk=awk
+      # choose the faster mawk if: it's installed && build date >= 20230322 && version >= 1.3.4
+      IFS=' .' read n x y z d <<< $(command mawk -W version 2> /dev/null)
+      [[ $n == mawk ]] && (( d >= 20230302 && (x *1000 +y) *1000 +z >= 1003004 )) && __fzf_awk=mawk
+    fi
+    [[ $(HISTTIMEFORMAT='' builtin history 1) =~ [[:digit:]]+ ]]    # how many history entries
+    script='function P(b) { ++n; sub(/^[ *]/, "", b); if (!seen[b]++) { printf "%d\t%s%c", '$((BASH_REMATCH + 1))' - n, b, 0 } }
+    NR==1 { b = substr($0, 2); next }
+    /^\t/ { P(b); b = substr($0, 2); next }
+    { b = b RS $0 }
+    END { if (NR) P(b) }'
+    output=$(
+      set +o pipefail
+      builtin fc -lnr -2147483648 2> /dev/null |   # ( $'\t '<lines>$'\n' )* ; <lines> ::= [^\n]* ( $'\n'<lines> )*
+        command $__fzf_awk "$script"           |   # ( <counter>$'\t'<lines>$'\000' )*
+        FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --wrap-sign '"$'\t'"↳ ' --highlight-line ${FZF_CTRL_R_OPTS-} +m --read0") \
+        FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) --query "$READLINE_LINE"
+    ) || return
+    READLINE_LINE=${output#*$'\t'}
+    if [[ -z "$READLINE_POINT" ]]; then
+      echo "$READLINE_LINE"
+    else
+      READLINE_POINT=0x7fffffff
+    fi
+  }
+fi
 
-if [[ ! -o vi ]]; then
-  # Required to refresh the prompt after fzf
-  bind '"\er": redraw-current-line'
-  bind '"\e^": history-expand-line'
+# Required to refresh the prompt after fzf
+bind -m emacs-standard '"\er": redraw-current-line'
 
+bind -m vi-command '"\C-z": emacs-editing-mode'
+bind -m vi-insert '"\C-z": emacs-editing-mode'
+bind -m emacs-standard '"\C-z": vi-editing-mode'
+
+if (( BASH_VERSINFO[0] < 4 )); then
   # CTRL-T - Paste the selected file path into the command line
-  if [ $BASH_VERSINFO -gt 3 ]; then
-    bind -x '"\C-t": "fzf-file-widget"'
-  elif __fzf_use_tmux__; then
-    bind '"\C-t": " \C-u \C-a\C-k`__fzf_select_tmux__`\e\C-e\C-y\C-a\C-d\C-y\ey\C-h"'
-  else
-    bind '"\C-t": " \C-u \C-a\C-k`__fzf_select__`\e\C-e\C-y\C-a\C-y\ey\C-h\C-e\er \C-h"'
+  if [[ "${FZF_CTRL_T_COMMAND-x}" != "" ]]; then
+    bind -m emacs-standard '"\C-t": " \C-b\C-k \C-u`__fzf_select__`\e\C-e\er\C-a\C-y\C-h\C-e\e \C-y\ey\C-x\C-x\C-f"'
+    bind -m vi-command '"\C-t": "\C-z\C-t\C-z"'
+    bind -m vi-insert '"\C-t": "\C-z\C-t\C-z"'
   fi
 
   # CTRL-R - Paste the selected command from history into the command line
-  bind '"\C-r": " \C-e\C-u`__fzf_history__`\e\C-e\e^\er"'
-
-  # ALT-C - cd into the selected directory
-  bind '"\ec": " \C-e\C-u`__fzf_cd__`\e\C-e\er\C-m"'
+  bind -m emacs-standard '"\C-r": "\C-e \C-u\C-y\ey\C-u`__fzf_history__`\e\C-e\er"'
+  bind -m vi-command '"\C-r": "\C-z\C-r\C-z"'
+  bind -m vi-insert '"\C-r": "\C-z\C-r\C-z"'
 else
-  # We'd usually use "\e" to enter vi-movement-mode so we can do our magic,
-  # but this incurs a very noticeable delay of a half second or so,
-  # because many other commands start with "\e".
-  # Instead, we bind an unused key, "\C-x\C-a",
-  # to also enter vi-movement-mode,
-  # and then use that thereafter.
-  # (We imagine that "\C-x\C-a" is relatively unlikely to be in use.)
-  bind '"\C-x\C-a": vi-movement-mode'
-
-  bind '"\C-x\C-e": shell-expand-line'
-  bind '"\C-x\C-r": redraw-current-line'
-  bind '"\C-x^": history-expand-line'
-
   # CTRL-T - Paste the selected file path into the command line
-  # - FIXME: Selected items are attached to the end regardless of cursor position
-  if [ $BASH_VERSINFO -gt 3 ]; then
-    bind -x '"\C-t": "fzf-file-widget"'
-  elif __fzf_use_tmux__; then
-    bind '"\C-t": "\C-x\C-a$a \C-x\C-addi`__fzf_select_tmux__`\C-x\C-e\C-x\C-a0P$xa"'
-  else
-    bind '"\C-t": "\C-x\C-a$a \C-x\C-addi`__fzf_select__`\C-x\C-e\C-x\C-a0Px$a \C-x\C-r\C-x\C-axa "'
+  if [[ "${FZF_CTRL_T_COMMAND-x}" != "" ]]; then
+    bind -m emacs-standard -x '"\C-t": fzf-file-widget'
+    bind -m vi-command -x '"\C-t": fzf-file-widget'
+    bind -m vi-insert -x '"\C-t": fzf-file-widget'
   fi
-  bind -m vi-command '"\C-t": "i\C-t"'
 
   # CTRL-R - Paste the selected command from history into the command line
-  bind '"\C-r": "\C-x\C-addi`__fzf_history__`\C-x\C-e\C-x^\C-x\C-a$a\C-x\C-r"'
-  bind -m vi-command '"\C-r": "i\C-r"'
+  bind -m emacs-standard -x '"\C-r": __fzf_history__'
+  bind -m vi-command -x '"\C-r": __fzf_history__'
+  bind -m vi-insert -x '"\C-r": __fzf_history__'
+fi
 
-  # ALT-C - cd into the selected directory
-  bind '"\ec": "\C-x\C-addi`__fzf_cd__`\C-x\C-e\C-x\C-r\C-m"'
-  bind -m vi-command '"\ec": "ddi`__fzf_cd__`\C-x\C-e\C-x\C-r\C-m"'
+# ALT-C - cd into the selected directory
+if [[ "${FZF_ALT_C_COMMAND-x}" != "" ]]; then
+  bind -m emacs-standard '"\ec": " \C-b\C-k \C-u`__fzf_cd__`\e\C-e\er\C-m\C-y\C-h\e \C-y\ey\C-x\C-x\C-d"'
+  bind -m vi-command '"\ec": "\C-z\ec\C-z"'
+  bind -m vi-insert '"\ec": "\C-z\ec\C-z"'
 fi
 
 fi

shell/key-bindings.fish

@@ -1,87 +1,230 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ key-bindings.fish
+#
+# - $FZF_TMUX_OPTS
+# - $FZF_CTRL_T_COMMAND
+# - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_OPTS
+# - $FZF_ALT_C_COMMAND
+# - $FZF_ALT_C_OPTS
+
+
 # Key bindings
 # ------------
+# The oldest supported fish version is 3.1b1. To maintain compatibility, the
+# command substitution syntax $(cmd) should never be used, even behind a version
+# check, otherwise the source command will fail on fish versions older than 3.4.0.
 function fzf_key_bindings
 
-  # Store last token in $dir as root for the 'find' command
-  function fzf-file-widget -d "List files and folders"
-    set -l dir (commandline -t)
-    # The commandline token might be escaped, we need to unescape it.
-    set dir (eval "printf '%s' $dir")
-    if [ ! -d "$dir" ]
-      set dir .
-    end
-    # Some 'find' versions print undesired duplicated slashes if the path ends with slashes.
-    set dir (string replace --regex '(.)/+$' '$1' "$dir")
-
-    # "-path \$dir'*/\\.*'" matches hidden files/folders inside $dir but not
-    # $dir itself, even if hidden.
-    set -q FZF_CTRL_T_COMMAND; or set -l FZF_CTRL_T_COMMAND "
-    command find -L \$dir -mindepth 1 \\( -path \$dir'*/\\.*' -o -fstype 'devfs' -o -fstype 'devtmpfs' \\) -prune \
-    -o -type f -print \
-    -o -type d -print \
-    -o -type l -print 2> /dev/null | sed 's#^\./##'"
-
-    set -q FZF_TMUX_HEIGHT; or set FZF_TMUX_HEIGHT 40%
-    begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS"
-      eval "$FZF_CTRL_T_COMMAND | "(__fzfcmd)" -m" | while read -l r; set result $result $r; end
-    end
-    if [ -z "$result" ]
-      commandline -f repaint
-      return
-    end
-
-    if [ "$dir" != . ]
-      # Remove last token from commandline.
-      commandline -t ""
-    end
-    for i in $result
-      commandline -it -- (string escape $i)
-      commandline -it -- ' '
-    end
-    commandline -f repaint
+  # Check fish version
+  set -l fish_ver (string match -r '^(\d+).(\d+)' $version 2> /dev/null; or echo 0\n0\n0)
+  if test \( "$fish_ver[2]" -lt 3 \) -o \( "$fish_ver[2]" -eq 3 -a "$fish_ver[3]" -lt 1 \)
+    echo "This script requires fish version 3.1b1 or newer." >&2
+    return 1
+  else if not type -q fzf
+    echo "fzf was not found in path." >&2
+    return 1
   end
 
-  function fzf-history-widget -d "Show command history"
-    set -q FZF_TMUX_HEIGHT; or set FZF_TMUX_HEIGHT 40%
-    begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT $FZF_DEFAULT_OPTS +s --no-reverse --tiebreak=index $FZF_CTRL_R_OPTS +m"
-      history | eval (__fzfcmd) -q '(commandline)' | read -l result
-      and commandline -- $result
-    end
-    commandline -f repaint
-  end
-
-  function fzf-cd-widget -d "Change directory"
-    set -q FZF_ALT_C_COMMAND; or set -l FZF_ALT_C_COMMAND "
-    command find -L . \\( -path '*/\\.*' -o -fstype 'devfs' -o -fstype 'devtmpfs' \\) -prune \
-    -o -type d -print 2> /dev/null | sed 1d | cut -b3-"
-    set -q FZF_TMUX_HEIGHT; or set FZF_TMUX_HEIGHT 40%
-    begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS"
-      eval "$FZF_ALT_C_COMMAND | "(__fzfcmd)" +m" | read -l result
-      [ "$result" ]; and cd $result
-    end
-    commandline -f repaint
+  function __fzf_defaults
+    # $argv[1]: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+    # $argv[2..]: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+    test -n "$FZF_TMUX_HEIGHT"; or set -l FZF_TMUX_HEIGHT 40%
+    string join ' ' -- \
+      "--height $FZF_TMUX_HEIGHT --min-height=20+ --bind=ctrl-z:ignore" $argv[1] \
+      (test -r "$FZF_DEFAULT_OPTS_FILE"; and string join -- ' ' <$FZF_DEFAULT_OPTS_FILE) \
+      $FZF_DEFAULT_OPTS $argv[2..-1]
   end
 
   function __fzfcmd
-    set -q FZF_TMUX; or set FZF_TMUX 0
-    set -q FZF_TMUX_HEIGHT; or set FZF_TMUX_HEIGHT 40%
-    if [ $FZF_TMUX -eq 1 ]
-      echo "fzf-tmux -d$FZF_TMUX_HEIGHT"
+    test -n "$FZF_TMUX_HEIGHT"; or set -l FZF_TMUX_HEIGHT 40%
+    if test -n "$FZF_TMUX_OPTS"
+      echo "fzf-tmux $FZF_TMUX_OPTS -- "
+    else if test "$FZF_TMUX" = "1"
+      echo "fzf-tmux -d$FZF_TMUX_HEIGHT -- "
     else
       echo "fzf"
     end
   end
 
-  bind \ct fzf-file-widget
-  bind \cr fzf-history-widget
-  bind \ec fzf-cd-widget
+  function __fzf_parse_commandline -d 'Parse the current command line token and return split of existing filepath, fzf query, and optional -option= prefix'
+    set -l fzf_query ''
+    set -l prefix ''
+    set -l dir '.'
 
-  if bind -M insert > /dev/null 2>&1
+    # Set variables containing the major and minor fish version numbers, using
+    # a method compatible with all supported fish versions.
+    set -l -- fish_major (string match -r -- '^\d+' $version)
+    set -l -- fish_minor (string match -r -- '^\d+\.(\d+)' $version)[2]
+
+    # fish v3.3.0 and newer: Don't use option prefix if " -- " is preceded.
+    set -l -- match_regex '(?<fzf_query>[\s\S]*?(?=\n?$)$)'
+    set -l -- prefix_regex '^-[^\s=]+=|^-(?!-)\S'
+    if test "$fish_major" -eq 3 -a "$fish_minor" -lt 3
+    or string match -q -v -- '* -- *' (string sub -l (commandline -Cp) -- (commandline -p))
+      set -- match_regex "(?<prefix>$prefix_regex)?$match_regex"
+    end
+
+    # Set $prefix and expanded $fzf_query with preserved trailing newlines.
+    if test "$fish_major" -ge 4
+      # fish v4.0.0 and newer
+      string match -q -r -- $match_regex (commandline --current-token --tokens-expanded | string collect -N)
+    else if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
+      # fish v3.2.0 - v3.7.1 (last v3)
+      string match -q -r -- $match_regex (commandline --current-token --tokenize | string collect -N)
+      eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^\\\(?=~)|\\\(?=\$\w)' '')
+    else
+      # fish older than v3.2.0 (v3.1b1 - v3.1.2)
+      set -l -- cl_token (commandline --current-token --tokenize | string collect -N)
+      set -- prefix (string match -r -- $prefix_regex $cl_token)
+      set -- fzf_query (string replace -- "$prefix" '' $cl_token | string collect -N)
+      eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^\\\(?=~)|\\\(?=\$\w)|\\\n\\\n$' '')
+    end
+
+    if test -n "$fzf_query"
+      # Normalize path in $fzf_query, set $dir to the longest existing directory.
+      if test \( "$fish_major" -ge 4 \) -o \( "$fish_major" -eq 3 -a "$fish_minor" -ge 5 \)
+        # fish v3.5.0 and newer
+        set -- fzf_query (path normalize -- $fzf_query)
+        set -- dir $fzf_query
+        while not path is -d $dir
+          set -- dir (path dirname $dir)
+        end
+      else
+        # fish older than v3.5.0 (v3.1b1 - v3.4.1)
+        if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
+          # fish v3.2.0 - v3.4.1
+          string match -q -r -- '(?<fzf_query>^[\s\S]*?(?=\n?$)$)' \
+            (string replace -r -a -- '(?<=/)/|(?<!^)/+(?!\n)$' '' $fzf_query | string collect -N)
+        else
+          # fish v3.1b1 - v3.1.2
+          set -- fzf_query (string replace -r -a -- '(?<=/)/|(?<!^)/+(?!\n)$' '' $fzf_query | string collect -N)
+          eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r '\\\n$' '')
+        end
+        set -- dir $fzf_query
+        while not test -d "$dir"
+          set -- dir (dirname -z -- "$dir" | string split0)
+        end
+      end
+
+      if not string match -q -- '.' $dir; or string match -q -r -- '^\./|^\.$' $fzf_query
+        # Strip $dir from $fzf_query - preserve trailing newlines.
+        if test "$fish_major" -ge 4
+          # fish v4.0.0 and newer
+          string match -q -r -- '^'(string escape --style=regex -- $dir)'/?(?<fzf_query>[\s\S]*)' $fzf_query
+        else if test "$fish_major" -eq 3 -a "$fish_minor" -ge 2
+          # fish v3.2.0 - v3.7.1 (last v3)
+          string match -q -r -- '^/?(?<fzf_query>[\s\S]*?(?=\n?$)$)' \
+            (string replace -- "$dir" '' $fzf_query | string collect -N)
+        else
+          # fish older than v3.2.0 (v3.1b1 - v3.1.2)
+          set -- fzf_query (string replace -- "$dir" '' $fzf_query | string collect -N)
+          eval set -- fzf_query (string escape -n -- $fzf_query | string replace -r -a '^/?|\\\n$' '')
+        end
+      end
+    end
+
+    string escape -n -- "$dir" "$fzf_query" "$prefix"
+  end
+
+  # Store current token in $dir as root for the 'find' command
+  function fzf-file-widget -d "List files and folders"
+    set -l commandline (__fzf_parse_commandline)
+    set -lx dir $commandline[1]
+    set -l fzf_query $commandline[2]
+    set -l prefix $commandline[3]
+
+    set -lx FZF_DEFAULT_OPTS (__fzf_defaults \
+      "--reverse --walker=file,dir,follow,hidden --scheme=path" \
+      "$FZF_CTRL_T_OPTS --multi --print0")
+
+    set -lx FZF_DEFAULT_COMMAND "$FZF_CTRL_T_COMMAND"
+    set -lx FZF_DEFAULT_OPTS_FILE
+
+    set -l result (eval (__fzfcmd) --walker-root=$dir --query=$fzf_query | string split0)
+    and commandline -rt -- (string join -- ' ' $prefix(string escape -- $result))' '
+
+    commandline -f repaint
+  end
+
+  function fzf-history-widget -d "Show command history"
+    set -l -- command_line (commandline)
+    set -l -- current_line (commandline -L)
+    set -l -- total_lines (count $command_line)
+    set -l -- fzf_query (string escape -- $command_line[$current_line])
+
+    set -lx FZF_DEFAULT_OPTS (__fzf_defaults '' \
+      '--nth=2..,.. --scheme=history --multi --wrap-sign="\t↳ "' \
+      '--bind=\'shift-delete:execute-silent(eval history delete --exact --case-sensitive -- (string escape -n -- {+} | string replace -r -a "^\d*\\\\\\t|(?<=\\\\\\n)\\\\\\t" ""))+reload(eval $FZF_DEFAULT_COMMAND)\'' \
+      "--bind=ctrl-r:toggle-sort --highlight-line $FZF_CTRL_R_OPTS" \
+      '--accept-nth=2.. --read0 --print0 --with-shell='(status fish-path)\\ -c)
+
+    set -lx FZF_DEFAULT_OPTS_FILE
+    set -lx FZF_DEFAULT_COMMAND
+
+    if type -q perl
+      set -a FZF_DEFAULT_OPTS '--tac'
+      set FZF_DEFAULT_COMMAND 'builtin history -z --reverse | command perl -0 -pe \'s/^/$.\t/g; s/\n/\n\t/gm\''
+    else
+      set FZF_DEFAULT_COMMAND \
+        'set -l h (builtin history -z --reverse | string split0);' \
+        'for i in (seq (count $h) -1 1);' \
+        'string join0 -- $i\t(string replace -a -- \n \n\t $h[$i] | string collect);' \
+        'end'
+    end
+
+    # Merge history from other sessions before searching
+    test -z "$fish_private_mode"; and builtin history merge
+
+    if set -l result (eval $FZF_DEFAULT_COMMAND \| (__fzfcmd) --query=$fzf_query | string split0)
+      if test "$total_lines" -eq 1
+        commandline -- (string replace -a -- \n\t \n $result)
+      else
+        set -l a (math $current_line - 1)
+        set -l b (math $current_line + 1)
+        commandline -- $command_line[1..$a] (string replace -a -- \n\t \n $result)
+        commandline -a -- '' $command_line[$b..-1]
+      end
+    end
+
+    commandline -f repaint
+  end
+
+  function fzf-cd-widget -d "Change directory"
+    set -l commandline (__fzf_parse_commandline)
+    set -lx dir $commandline[1]
+    set -l fzf_query $commandline[2]
+    set -l prefix $commandline[3]
+
+    set -lx FZF_DEFAULT_OPTS (__fzf_defaults \
+      "--reverse --walker=dir,follow,hidden --scheme=path" \
+      "$FZF_ALT_C_OPTS --no-multi --print0")
+
+    set -lx FZF_DEFAULT_OPTS_FILE
+    set -lx FZF_DEFAULT_COMMAND "$FZF_ALT_C_COMMAND"
+
+    if set -l result (eval (__fzfcmd) --query=$fzf_query --walker-root=$dir | string split0)
+      cd -- $result
+      commandline -rt -- $prefix
+    end
+
+    commandline -f repaint
+  end
+
+  bind \cr fzf-history-widget
+  bind -M insert \cr fzf-history-widget
+
+  if not set -q FZF_CTRL_T_COMMAND; or test -n "$FZF_CTRL_T_COMMAND"
+    bind \ct fzf-file-widget
     bind -M insert \ct fzf-file-widget
-    bind -M insert \cr fzf-history-widget
+  end
+
+  if not set -q FZF_ALT_C_COMMAND; or test -n "$FZF_ALT_C_COMMAND"
+    bind \ec fzf-cd-widget
     bind -M insert \ec fzf-cd-widget
   end
+
 end

shell/key-bindings.zsh

@@ -1,74 +1,144 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ key-bindings.zsh
+#
+# - $FZF_TMUX_OPTS
+# - $FZF_CTRL_T_COMMAND
+# - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_OPTS
+# - $FZF_ALT_C_COMMAND
+# - $FZF_ALT_C_OPTS
+
+
 # Key bindings
 # ------------
-if [[ $- == *i* ]]; then
+
+# The code at the top and the bottom of this file is the same as in completion.zsh.
+# Refer to that file for explanation.
+if 'zmodload' 'zsh/parameter' 2>'/dev/null' && (( ${+options} )); then
+  __fzf_key_bindings_options="options=(${(j: :)${(kv)options[@]}})"
+else
+  () {
+    __fzf_key_bindings_options="setopt"
+    'local' '__fzf_opt'
+    for __fzf_opt in "${(@)${(@f)$(set -o)}%% *}"; do
+      if [[ -o "$__fzf_opt" ]]; then
+        __fzf_key_bindings_options+=" -o $__fzf_opt"
+      else
+        __fzf_key_bindings_options+=" +o $__fzf_opt"
+      fi
+    done
+  }
+fi
+
+'builtin' 'emulate' 'zsh' && 'builtin' 'setopt' 'no_aliases'
+
+{
+if [[ -o interactive ]]; then
+
+__fzf_defaults() {
+  # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  echo -E "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo -E "${FZF_DEFAULT_OPTS-} $2"
+}
 
 # CTRL-T - Paste the selected file path(s) into the command line
-__fsel() {
-  local cmd="${FZF_CTRL_T_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/\\.*' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
-    -o -type f -print \
-    -o -type d -print \
-    -o -type l -print 2> /dev/null | cut -b3-"}"
-  setopt localoptions pipefail 2> /dev/null
-  eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS" $(__fzfcmd) -m "$@" | while read item; do
-    echo -n "${(q)item} "
+__fzf_select() {
+  setopt localoptions pipefail no_aliases 2> /dev/null
+  local item
+  FZF_DEFAULT_COMMAND=${FZF_CTRL_T_COMMAND:-} \
+  FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --walker=file,dir,follow,hidden --scheme=path" "${FZF_CTRL_T_OPTS-} -m") \
+  FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) "$@" < /dev/tty | while read -r item; do
+    echo -n -E "${(q)item} "
   done
   local ret=$?
   echo
   return $ret
 }
 
-__fzf_use_tmux__() {
-  [ -n "$TMUX_PANE" ] && [ "${FZF_TMUX:-0}" != 0 ] && [ ${LINES:-40} -gt 15 ]
-}
-
 __fzfcmd() {
-  __fzf_use_tmux__ &&
-    echo "fzf-tmux -d${FZF_TMUX_HEIGHT:-40%}" || echo "fzf"
+  [ -n "${TMUX_PANE-}" ] && { [ "${FZF_TMUX:-0}" != 0 ] || [ -n "${FZF_TMUX_OPTS-}" ]; } &&
+    echo "fzf-tmux ${FZF_TMUX_OPTS:--d${FZF_TMUX_HEIGHT:-40%}} -- " || echo "fzf"
 }
 
 fzf-file-widget() {
-  LBUFFER="${LBUFFER}$(__fsel)"
+  LBUFFER="${LBUFFER}$(__fzf_select)"
   local ret=$?
-  zle redisplay
-  typeset -f zle-line-init >/dev/null && zle zle-line-init
+  zle reset-prompt
   return $ret
 }
-zle     -N   fzf-file-widget
-bindkey '^T' fzf-file-widget
+if [[ "${FZF_CTRL_T_COMMAND-x}" != "" ]]; then
+  zle     -N            fzf-file-widget
+  bindkey -M emacs '^T' fzf-file-widget
+  bindkey -M vicmd '^T' fzf-file-widget
+  bindkey -M viins '^T' fzf-file-widget
+fi
 
 # ALT-C - cd into the selected directory
 fzf-cd-widget() {
-  local cmd="${FZF_ALT_C_COMMAND:-"command find -L . \\( -path '*/\\.*' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
-    -o -type d -print 2> /dev/null | sed 1d | cut -b3-"}"
-  setopt localoptions pipefail 2> /dev/null
-  cd "${$(eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS" $(__fzfcmd) +m):-.}"
+  setopt localoptions pipefail no_aliases 2> /dev/null
+  local dir="$(
+    FZF_DEFAULT_COMMAND=${FZF_ALT_C_COMMAND:-} \
+    FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --walker=dir,follow,hidden --scheme=path" "${FZF_ALT_C_OPTS-} +m") \
+    FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) < /dev/tty)"
+  if [[ -z "$dir" ]]; then
+    zle redisplay
+    return 0
+  fi
+  zle push-line # Clear buffer. Auto-restored on next prompt.
+  BUFFER="builtin cd -- ${(q)dir:a}"
+  zle accept-line
   local ret=$?
+  unset dir # ensure this doesn't end up appearing in prompt expansion
   zle reset-prompt
-  typeset -f zle-line-init >/dev/null && zle zle-line-init
   return $ret
 }
-zle     -N    fzf-cd-widget
-bindkey '\ec' fzf-cd-widget
+if [[ "${FZF_ALT_C_COMMAND-x}" != "" ]]; then
+  zle     -N             fzf-cd-widget
+  bindkey -M emacs '\ec' fzf-cd-widget
+  bindkey -M vicmd '\ec' fzf-cd-widget
+  bindkey -M viins '\ec' fzf-cd-widget
+fi
 
 # CTRL-R - Paste the selected command from history into the command line
 fzf-history-widget() {
-  local selected num
-  setopt localoptions noglobsubst pipefail 2> /dev/null
-  selected=( $(fc -l 1 |
-    FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS +s --tac --no-reverse -n2..,.. --tiebreak=index --toggle-sort=ctrl-r $FZF_CTRL_R_OPTS +m --query=${(q)LBUFFER}" $(__fzfcmd)) )
+  local selected
+  setopt localoptions noglobsubst noposixbuiltins pipefail no_aliases noglob nobash_rematch 2> /dev/null
+  # Ensure the module is loaded if not already, and the required features, such
+  # as the associative 'history' array, which maps event numbers to full history
+  # lines, are set. Also, make sure Perl is installed for multi-line output.
+  if zmodload -F zsh/parameter p:{commands,history} 2>/dev/null && (( ${+commands[perl]} )); then
+    selected="$(printf '%s\t%s\000' "${(kv)history[@]}" |
+      perl -0 -ne 'if (!$seen{(/^\s*[0-9]+\**\t(.*)/s, $1)}++) { s/\n/\n\t/g; print; }' |
+      FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --wrap-sign '\t↳ ' --highlight-line ${FZF_CTRL_R_OPTS-} --query=${(qqq)LBUFFER} +m --read0") \
+      FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd))"
+  else
+    selected="$(fc -rl 1 | awk '{ cmd=$0; sub(/^[ \t]*[0-9]+\**[ \t]+/, "", cmd); if (!seen[cmd]++) print $0 }' |
+      FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --wrap-sign '\t↳ ' --highlight-line ${FZF_CTRL_R_OPTS-} --query=${(qqq)LBUFFER} +m") \
+      FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd))"
+  fi
   local ret=$?
   if [ -n "$selected" ]; then
-    num=$selected[1]
-    if [ -n "$num" ]; then
-      zle vi-fetch-history -n $num
+    if [[ $(awk '{print $1; exit}' <<< "$selected") =~ ^[1-9][0-9]* ]]; then
+      zle vi-fetch-history -n $MATCH
+    else # selected is a custom query, not from history
+      LBUFFER="$selected"
     fi
   fi
-  zle redisplay
-  typeset -f zle-line-init >/dev/null && zle zle-line-init
+  zle reset-prompt
   return $ret
 }
-zle     -N   fzf-history-widget
-bindkey '^R' fzf-history-widget
-
+zle     -N            fzf-history-widget
+bindkey -M emacs '^R' fzf-history-widget
+bindkey -M vicmd '^R' fzf-history-widget
+bindkey -M viins '^R' fzf-history-widget
 fi
 
+} always {
+  eval $__fzf_key_bindings_options
+  'unset' '__fzf_key_bindings_options'
+}

src/Dockerfile.android

@@ -1,40 +0,0 @@
-FROM ubuntu:14.04
-MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
-
-# apt-get
-RUN apt-get update && apt-get -y upgrade && \
-    apt-get install -y --force-yes git curl build-essential
-
-# Install Go 1.4
-RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.4 && \
-    sed -i 's@#define PTHREAD_KEYS_MAX 128@@' /go1.4/src/runtime/cgo/gcc_android_arm.c
-
-ENV GOROOT /go1.4
-ENV PATH /go1.4/bin:$PATH
-
-RUN cd / && \
-    curl -O http://dl.google.com/android/ndk/android-ndk-r10e-linux-x86_64.bin && \
-    chmod 755 /android-ndk* && /android-ndk-r10e-linux-x86_64.bin && \
-    mv android-ndk-r10e /android-ndk
-
-RUN cd /android-ndk && bash ./build/tools/make-standalone-toolchain.sh --platform=android-21 --install-dir=/ndk --arch=arm
-
-ENV NDK_CC /ndk/bin/arm-linux-androideabi-gcc
-
-RUN cd $GOROOT/src && \
-    CC_FOR_TARGET=$NDK_CC GOOS=android GOARCH=arm GOARM=7 ./make.bash
-
-RUN cd / && curl \
-    http://ftp.gnu.org/gnu/ncurses/ncurses-5.9.tar.gz | \
-    tar -xz && cd /ncurses-5.9 && \
-    ./configure CC=$NDK_CC CFLAGS="-fPIE -march=armv7-a -mfpu=neon -mhard-float -Wl,--no-warn-mismatch" LDFLAGS="-march=armv7-a -Wl,--no-warn-mismatch" --host=arm-linux --enable-overwrite --enable-const --without-cxx-binding  --without-shared --without-debug --enable-widec --enable-ext-colors --enable-ext-mouse --enable-pc-files --with-pkg-config-libdir=$PKG_CONFIG_LIBDIR --without-manpages --without-ada --disable-shared --without-tests --prefix=/ndk/sysroot/usr --with-default-terminfo-dirs=/usr/share/terminfo --with-terminfo-dirs=/usr/share/terminfo ac_cv_header_locale_h=n ac_cv_func_getpwent=no ac_cv_func_getpwnam=no ac_cv_func_getpwuid=no && \
-    sed -i 's@#define HAVE_LOCALE_H 1@/* #undef HAVE_LOCALE_H */@' include/ncurses_cfg.h && \
-    make && \
-    sed -i '0,/echo.*/{s/echo.*/exit 0/}' misc/run_tic.sh && \
-    make install && \
-    mv /ndk/sysroot/usr/lib/libncursesw.a /ndk/sysroot/usr/lib/libncurses.a
-
-# Default CMD
-CMD cd /fzf/src && /bin/bash

src/Dockerfile.arch

@@ -1,24 +0,0 @@
-FROM base/archlinux:2014.07.03
-MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
-
-# apt-get
-RUN pacman-key --populate archlinux && pacman-key --refresh-keys
-RUN pacman-db-upgrade && pacman -Syu --noconfirm base-devel git
-
-# Install Go 1.4
-RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.4
-
-ENV GOROOT /go1.4
-ENV PATH /go1.4/bin:$PATH
-
-# For i386 build
-RUN echo '[multilib]' >> /etc/pacman.conf && \
-    echo 'Include = /etc/pacman.d/mirrorlist' >> /etc/pacman.conf && \
-    pacman-db-upgrade && yes | pacman -Sy gcc-multilib lib32-ncurses && \
-    cd $GOROOT/src && GOARCH=386 ./make.bash
-
-# Default CMD
-CMD cd /fzf/src && /bin/bash
-

src/Dockerfile.centos

@@ -1,32 +0,0 @@
-FROM centos:centos6
-MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
-
-# yum
-RUN yum install -y git gcc make tar glibc-devel glibc-devel.i686 \
-    ncurses-devel ncurses-static ncurses-devel.i686 \
-    gpm-devel gpm-static libgcc.i686
-
-# Install Go 1.4
-RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.4
-
-# Install Go 1.7
-RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.7.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.7
-
-# Install RPMs for building static 32-bit binary
-RUN curl ftp://ftp.pbone.net/mirror/ftp.centos.org/6.8/os/i386/Packages/ncurses-static-5.7-4.20090207.el6.i686.rpm -o rpm && rpm -i rpm && \
-    curl ftp://ftp.pbone.net/mirror/ftp.centos.org/6.8/os/i386/Packages/gpm-static-1.20.6-12.el6.i686.rpm -o rpm && rpm -i rpm
-
-ENV GOROOT_BOOTSTRAP /go1.4
-ENV GOROOT /go1.7
-ENV PATH /go1.7/bin:$PATH
-
-# For i386 build
-RUN cd $GOROOT/src && GOARCH=386 ./make.bash
-
-# Default CMD
-CMD cd /fzf/src && /bin/bash
-

src/Dockerfile.ubuntu

@@ -1,22 +0,0 @@
-FROM ubuntu:14.04
-MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
-
-# apt-get
-RUN apt-get update && apt-get -y upgrade && \
-    apt-get install -y --force-yes git curl build-essential libncurses-dev libgpm-dev
-
-# Install Go 1.4
-RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.4
-
-ENV GOROOT /go1.4
-ENV PATH /go1.4/bin:$PATH
-
-# For i386 build
-RUN apt-get install -y lib32ncurses5-dev && \
-    cd $GOROOT/src && GOARCH=386 ./make.bash
-
-# Default CMD
-CMD cd /fzf/src && /bin/bash
-

src/LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2016 Junegunn Choi
+Copyright (c) 2013-2024 Junegunn Choi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

src/Makefile

@@ -1,123 +0,0 @@
-ifndef GOOS
-UNAME_S := $(shell uname -s)
-ifeq ($(UNAME_S),Darwin)
-	GOOS := darwin
-else ifeq ($(UNAME_S),Linux)
-	GOOS := linux
-endif
-endif
-
-SOURCES     := $(wildcard *.go */*.go)
-ROOTDIR     := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
-BINDIR      := $(shell dirname $(ROOTDIR))/bin
-GOPATH      := $(shell dirname $(ROOTDIR))/gopath
-SRCDIR      := $(GOPATH)/src/github.com/junegunn/fzf/src
-DOCKEROPTS  := -i -t -v $(ROOTDIR):/fzf/src
-BINARY32    := fzf-$(GOOS)_386
-BINARY64    := fzf-$(GOOS)_amd64
-BINARYARM7  := fzf-$(GOOS)_arm7
-VERSION     := $(shell awk -F= '/version =/ {print $$2}' constants.go | tr -d "\" ")
-RELEASE32   := fzf-$(VERSION)-$(GOOS)_386
-RELEASE64   := fzf-$(VERSION)-$(GOOS)_amd64
-RELEASEARM7 := fzf-$(VERSION)-$(GOOS)_arm7
-export GOPATH
-
-UNAME_M := $(shell uname -m)
-ifeq ($(UNAME_M),x86_64)
-	BINARY := $(BINARY64)
-else ifeq ($(UNAME_M),i686)
-	BINARY := $(BINARY32)
-else
-$(error "Build on $(UNAME_M) is not supported, yet.")
-endif
-
-all: fzf/$(BINARY)
-
-ifeq ($(GOOS),windows)
-release: fzf/$(BINARY32) fzf/$(BINARY64)
-	-cd fzf && cp $(BINARY32) $(RELEASE32).exe && zip $(RELEASE32).zip $(RELEASE32).exe
-	cd fzf && cp $(BINARY64) $(RELEASE64).exe && zip $(RELEASE64).zip $(RELEASE64).exe && \
-	rm -f $(RELEASE32).exe $(RELEASE64).exe
-else
-release: test fzf/$(BINARY32) fzf/$(BINARY64)
-	-cd fzf && cp $(BINARY32) $(RELEASE32) && tar -czf $(RELEASE32).tgz $(RELEASE32)
-	cd fzf && cp $(BINARY64) $(RELEASE64) && tar -czf $(RELEASE64).tgz $(RELEASE64) && \
-	rm -f $(RELEASE32) $(RELEASE64)
-endif
-
-$(SRCDIR):
-	mkdir -p $(shell dirname $(SRCDIR))
-	ln -s $(ROOTDIR) $(SRCDIR)
-
-deps: $(SRCDIR) $(SOURCES)
-	cd $(SRCDIR) && go get -tags "$(TAGS)"
-
-android-build: $(SRCDIR)
-	cd $(SRCDIR) && GOARCH=arm GOARM=7 CGO_ENABLED=1 go get
-	cd $(SRCDIR)/fzf && GOARCH=arm GOARM=7 CGO_ENABLED=1 go build -a -ldflags="-w -extldflags=-pie" -o $(BINARYARM7)
-	cd $(SRCDIR)/fzf && cp $(BINARYARM7) $(RELEASEARM7) && tar -czf $(RELEASEARM7).tgz $(RELEASEARM7) && \
-	rm -f $(RELEASEARM7)
-
-test: deps
-	SHELL=/bin/sh GOOS=$(GOOS) go test -v -tags "$(TAGS)" ./...
-
-install: $(BINDIR)/fzf
-
-uninstall:
-	rm -f $(BINDIR)/fzf $(BINDIR)/$(BINARY)
-
-clean:
-	cd fzf && rm -f fzf-*
-
-fzf/$(BINARY32): deps
-	cd fzf && GOARCH=386 CGO_ENABLED=1 go build -a -ldflags "-w -extldflags=$(LDFLAGS)" -tags "$(TAGS)" -o $(BINARY32)
-
-fzf/$(BINARY64): deps
-	cd fzf && go build -a -ldflags "-w -extldflags=$(LDFLAGS)" -tags "$(TAGS)" -o $(BINARY64)
-
-$(BINDIR)/fzf: fzf/$(BINARY) | $(BINDIR)
-	cp -f fzf/$(BINARY) $(BINDIR)
-	cd $(BINDIR) && ln -sf $(BINARY) fzf
-
-$(BINDIR):
-	mkdir -p $@
-
-docker-arch:
-	docker build -t junegunn/arch-sandbox - < Dockerfile.arch
-
-docker-ubuntu:
-	docker build -t junegunn/ubuntu-sandbox - < Dockerfile.ubuntu
-
-docker-centos:
-	docker build -t junegunn/centos-sandbox - < Dockerfile.centos
-
-docker-android:
-	docker build -t junegunn/android-sandbox - < Dockerfile.android
-
-arch: docker-arch
-	docker run $(DOCKEROPTS) junegunn/$@-sandbox \
-		sh -c 'cd /fzf/src; /bin/bash'
-
-ubuntu: docker-ubuntu
-	docker run $(DOCKEROPTS) junegunn/$@-sandbox \
-		sh -c 'cd /fzf/src; /bin/bash'
-
-centos: docker-centos
-	docker run $(DOCKEROPTS) junegunn/$@-sandbox \
-		sh -c 'cd /fzf/src; /bin/bash'
-
-linux: docker-centos
-	docker run $(DOCKEROPTS) junegunn/centos-sandbox \
-		/bin/bash -ci 'cd /fzf/src; make TAGS=static release'
-
-ubuntu-android: docker-android
-	docker run $(DOCKEROPTS) junegunn/android-sandbox \
-		sh -c 'cd /fzf/src; /bin/bash'
-
-android: docker-android
-	docker run $(DOCKEROPTS) junegunn/android-sandbox \
-		/bin/bash -ci 'cd /fzf/src; GOOS=android make android-build'
-
-.PHONY: all deps release test install uninstall clean \
-	linux arch ubuntu centos docker-arch docker-ubuntu docker-centos \
-	android-build docker-android ubuntu-android android

src/README.md

@@ -1,95 +0,0 @@
-fzf in Go
-=========
-
-<img src="https://cloud.githubusercontent.com/assets/700826/5725028/028ea834-9b93-11e4-9198-43088c3f295d.gif" height="463" alt="fzf in go">
-
-This directory contains the source code for the new fzf implementation in
-[Go][go].
-
-Upgrade from Ruby version
--------------------------
-
-The install script has been updated to download the right binary for your
-system. If you already have installed fzf, simply git-pull the repository and
-rerun the install script.
-
-```sh
-cd ~/.fzf
-git pull
-./install
-```
-
-Otherwise, follow [the instruction][install] as before. You can also install
-fzf using Homebrew if you prefer that way.
-
-Motivations
------------
-
-### No Ruby dependency
-
-There have always been complaints about fzf being a Ruby script. To make
-matters worse, Ruby 2.1 removed ncurses binding from its standard libary.
-Because of the change, users running Ruby 2.1 or above are forced to build C
-extensions of curses gem to meet the requirement of fzf. The new Go version
-will be distributed as an executable binary so it will be much more accessible
-and should be easier to setup.
-
-### Performance
-
-Many people have been surprised to see how fast fzf is even when it was
-written in Ruby. It stays quite responsive even for 100k+ lines, which is
-well above the size of the usual input.
-
-The new Go version, of course, is significantly faster than that. It has all
-the performance optimization techniques used in Ruby implementation and more.
-It also doesn't suffer from [GIL][gil], so the search performance scales
-proportional to the number of CPU cores. On my MacBook Pro (Mid 2012), the new
-version was shown to be an order of magnitude faster on certain cases. It also
-starts much faster though the difference may not be noticeable.
-
-Build
------
-
-See [BUILD.md](../BUILD.md)
-
-Test
-----
-
-Unit tests can be run with `make test`. Integration tests are written in Ruby
-script that should be run on tmux.
-
-```sh
-# Unit tests
-make test
-
-# Install the executable to ../bin directory
-make install
-
-# Integration tests
-ruby ../test/test_go.rb
-```
-
-Third-party libraries used
---------------------------
-
-- [ncurses][ncurses]
-- [mattn/go-runewidth](https://github.com/mattn/go-runewidth)
-    - Licensed under [MIT](http://mattn.mit-license.org)
-- [mattn/go-shellwords](https://github.com/mattn/go-shellwords)
-    - Licensed under [MIT](http://mattn.mit-license.org)
-- [mattn/go-isatty](https://github.com/mattn/go-isatty)
-    - Licensed under [MIT](http://mattn.mit-license.org)
-- [tcell](https://github.com/gdamore/tcell)
-    - Licensed under [Apache License 2.0](https://github.com/gdamore/tcell/blob/master/LICENSE)
-
-License
--------
-
-[MIT](LICENSE)
-
-[install]: https://github.com/junegunn/fzf#installation
-[go]:      https://golang.org/
-[gil]:     http://en.wikipedia.org/wiki/Global_Interpreter_Lock
-[ncurses]: https://www.gnu.org/software/ncurses/
-[req]:     http://golang.org/doc/install
-[tcell]:   https://github.com/gdamore/tcell

src/actiontype_string.go

@@ -0,0 +1,160 @@
+// Code generated by "stringer -type=actionType"; DO NOT EDIT.
+
+package fzf
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[actIgnore-0]
+	_ = x[actStart-1]
+	_ = x[actClick-2]
+	_ = x[actInvalid-3]
+	_ = x[actBracketedPasteBegin-4]
+	_ = x[actBracketedPasteEnd-5]
+	_ = x[actChar-6]
+	_ = x[actMouse-7]
+	_ = x[actBeginningOfLine-8]
+	_ = x[actAbort-9]
+	_ = x[actAccept-10]
+	_ = x[actAcceptNonEmpty-11]
+	_ = x[actAcceptOrPrintQuery-12]
+	_ = x[actBackwardChar-13]
+	_ = x[actBackwardDeleteChar-14]
+	_ = x[actBackwardDeleteCharEof-15]
+	_ = x[actBackwardWord-16]
+	_ = x[actCancel-17]
+	_ = x[actChangeBorderLabel-18]
+	_ = x[actChangeGhost-19]
+	_ = x[actChangeHeader-20]
+	_ = x[actChangeHeaderLabel-21]
+	_ = x[actChangeInputLabel-22]
+	_ = x[actChangeListLabel-23]
+	_ = x[actChangeMulti-24]
+	_ = x[actChangeNth-25]
+	_ = x[actChangePointer-26]
+	_ = x[actChangePreview-27]
+	_ = x[actChangePreviewLabel-28]
+	_ = x[actChangePreviewWindow-29]
+	_ = x[actChangePrompt-30]
+	_ = x[actChangeQuery-31]
+	_ = x[actClearScreen-32]
+	_ = x[actClearQuery-33]
+	_ = x[actClearSelection-34]
+	_ = x[actClose-35]
+	_ = x[actDeleteChar-36]
+	_ = x[actDeleteCharEof-37]
+	_ = x[actEndOfLine-38]
+	_ = x[actFatal-39]
+	_ = x[actForwardChar-40]
+	_ = x[actForwardWord-41]
+	_ = x[actKillLine-42]
+	_ = x[actKillWord-43]
+	_ = x[actUnixLineDiscard-44]
+	_ = x[actUnixWordRubout-45]
+	_ = x[actYank-46]
+	_ = x[actBackwardKillWord-47]
+	_ = x[actSelectAll-48]
+	_ = x[actDeselectAll-49]
+	_ = x[actToggle-50]
+	_ = x[actToggleSearch-51]
+	_ = x[actToggleAll-52]
+	_ = x[actToggleDown-53]
+	_ = x[actToggleUp-54]
+	_ = x[actToggleIn-55]
+	_ = x[actToggleOut-56]
+	_ = x[actToggleTrack-57]
+	_ = x[actToggleTrackCurrent-58]
+	_ = x[actToggleHeader-59]
+	_ = x[actToggleWrap-60]
+	_ = x[actToggleMultiLine-61]
+	_ = x[actToggleHscroll-62]
+	_ = x[actTrackCurrent-63]
+	_ = x[actToggleInput-64]
+	_ = x[actHideInput-65]
+	_ = x[actShowInput-66]
+	_ = x[actUntrackCurrent-67]
+	_ = x[actDown-68]
+	_ = x[actUp-69]
+	_ = x[actPageUp-70]
+	_ = x[actPageDown-71]
+	_ = x[actPosition-72]
+	_ = x[actHalfPageUp-73]
+	_ = x[actHalfPageDown-74]
+	_ = x[actOffsetUp-75]
+	_ = x[actOffsetDown-76]
+	_ = x[actOffsetMiddle-77]
+	_ = x[actJump-78]
+	_ = x[actJumpAccept-79]
+	_ = x[actPrintQuery-80]
+	_ = x[actRefreshPreview-81]
+	_ = x[actReplaceQuery-82]
+	_ = x[actToggleSort-83]
+	_ = x[actShowPreview-84]
+	_ = x[actHidePreview-85]
+	_ = x[actTogglePreview-86]
+	_ = x[actTogglePreviewWrap-87]
+	_ = x[actTransform-88]
+	_ = x[actTransformBorderLabel-89]
+	_ = x[actTransformGhost-90]
+	_ = x[actTransformHeader-91]
+	_ = x[actTransformHeaderLabel-92]
+	_ = x[actTransformInputLabel-93]
+	_ = x[actTransformListLabel-94]
+	_ = x[actTransformNth-95]
+	_ = x[actTransformPointer-96]
+	_ = x[actTransformPreviewLabel-97]
+	_ = x[actTransformPrompt-98]
+	_ = x[actTransformQuery-99]
+	_ = x[actTransformSearch-100]
+	_ = x[actSearch-101]
+	_ = x[actPreview-102]
+	_ = x[actPreviewTop-103]
+	_ = x[actPreviewBottom-104]
+	_ = x[actPreviewUp-105]
+	_ = x[actPreviewDown-106]
+	_ = x[actPreviewPageUp-107]
+	_ = x[actPreviewPageDown-108]
+	_ = x[actPreviewHalfPageUp-109]
+	_ = x[actPreviewHalfPageDown-110]
+	_ = x[actPrevHistory-111]
+	_ = x[actPrevSelected-112]
+	_ = x[actPrint-113]
+	_ = x[actPut-114]
+	_ = x[actNextHistory-115]
+	_ = x[actNextSelected-116]
+	_ = x[actExecute-117]
+	_ = x[actExecuteSilent-118]
+	_ = x[actExecuteMulti-119]
+	_ = x[actSigStop-120]
+	_ = x[actFirst-121]
+	_ = x[actLast-122]
+	_ = x[actReload-123]
+	_ = x[actReloadSync-124]
+	_ = x[actDisableSearch-125]
+	_ = x[actEnableSearch-126]
+	_ = x[actSelect-127]
+	_ = x[actDeselect-128]
+	_ = x[actUnbind-129]
+	_ = x[actRebind-130]
+	_ = x[actToggleBind-131]
+	_ = x[actBecome-132]
+	_ = x[actShowHeader-133]
+	_ = x[actHideHeader-134]
+	_ = x[actBell-135]
+	_ = x[actExclude-136]
+	_ = x[actExcludeMulti-137]
+}
+
+const _actionType_name = "actIgnoreactStartactClickactInvalidactBracketedPasteBeginactBracketedPasteEndactCharactMouseactBeginningOfLineactAbortactAcceptactAcceptNonEmptyactAcceptOrPrintQueryactBackwardCharactBackwardDeleteCharactBackwardDeleteCharEofactBackwardWordactCancelactChangeBorderLabelactChangeGhostactChangeHeaderactChangeHeaderLabelactChangeInputLabelactChangeListLabelactChangeMultiactChangeNthactChangePointeractChangePreviewactChangePreviewLabelactChangePreviewWindowactChangePromptactChangeQueryactClearScreenactClearQueryactClearSelectionactCloseactDeleteCharactDeleteCharEofactEndOfLineactFatalactForwardCharactForwardWordactKillLineactKillWordactUnixLineDiscardactUnixWordRuboutactYankactBackwardKillWordactSelectAllactDeselectAllactToggleactToggleSearchactToggleAllactToggleDownactToggleUpactToggleInactToggleOutactToggleTrackactToggleTrackCurrentactToggleHeaderactToggleWrapactToggleMultiLineactToggleHscrollactTrackCurrentactToggleInputactHideInputactShowInputactUntrackCurrentactDownactUpactPageUpactPageDownactPositionactHalfPageUpactHalfPageDownactOffsetUpactOffsetDownactOffsetMiddleactJumpactJumpAcceptactPrintQueryactRefreshPreviewactReplaceQueryactToggleSortactShowPreviewactHidePreviewactTogglePreviewactTogglePreviewWrapactTransformactTransformBorderLabelactTransformGhostactTransformHeaderactTransformHeaderLabelactTransformInputLabelactTransformListLabelactTransformNthactTransformPointeractTransformPreviewLabelactTransformPromptactTransformQueryactTransformSearchactSearchactPreviewactPreviewTopactPreviewBottomactPreviewUpactPreviewDownactPreviewPageUpactPreviewPageDownactPreviewHalfPageUpactPreviewHalfPageDownactPrevHistoryactPrevSelectedactPrintactPutactNextHistoryactNextSelectedactExecuteactExecuteSilentactExecuteMultiactSigStopactFirstactLastactReloadactReloadSyncactDisableSearchactEnableSearchactSelectactDeselectactUnbindactRebindactToggleBindactBecomeactShowHeaderactHideHeaderactBellactExcludeactExcludeMulti"
+
+var _actionType_index = [...]uint16{0, 9, 17, 25, 35, 57, 77, 84, 92, 110, 118, 127, 144, 165, 180, 201, 225, 240, 249, 269, 283, 298, 318, 337, 355, 369, 381, 397, 413, 434, 456, 471, 485, 499, 512, 529, 537, 550, 566, 578, 586, 600, 614, 625, 636, 654, 671, 678, 697, 709, 723, 732, 747, 759, 772, 783, 794, 806, 820, 841, 856, 869, 887, 903, 918, 932, 944, 956, 973, 980, 985, 994, 1005, 1016, 1029, 1044, 1055, 1068, 1083, 1090, 1103, 1116, 1133, 1148, 1161, 1175, 1189, 1205, 1225, 1237, 1260, 1277, 1295, 1318, 1340, 1361, 1376, 1395, 1419, 1437, 1454, 1472, 1481, 1491, 1504, 1520, 1532, 1546, 1562, 1580, 1600, 1622, 1636, 1651, 1659, 1665, 1679, 1694, 1704, 1720, 1735, 1745, 1753, 1760, 1769, 1782, 1798, 1813, 1822, 1833, 1842, 1851, 1864, 1873, 1886, 1899, 1906, 1916, 1931}
+
+func (i actionType) String() string {
+	if i < 0 || i >= actionType(len(_actionType_index)-1) {
+		return "actionType(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _actionType_name[_actionType_index[i]:_actionType_index[i+1]]
+}

src/algo/algo.go

@@ -78,15 +78,22 @@ Scoring criteria
 */
 
 import (
+	"bytes"
 	"fmt"
+	"os"
 	"strings"
 	"unicode"
+	"unicode/utf8"
 
 	"github.com/junegunn/fzf/src/util"
 )
 
 var DEBUG bool
 
+var delimiterChars = "/,:;|"
+
+const whiteChars = " \t\n\v\f\r\x85\xA0"
+
 func indexAt(index int, max int, forward bool) int {
 	if forward {
 		return index
@@ -105,7 +112,7 @@ type Result struct {
 const (
 	scoreMatch        = 16
 	scoreGapStart     = -3
-	scoreGapExtention = -1
+	scoreGapExtension = -1
 
 	// We prefer matches at the beginning of a word, but the bonus should not be
 	// too great to prevent the longer acronym matches from always winning over
@@ -123,31 +130,93 @@ const (
 	// Edge-triggered bonus for matches in camelCase words.
 	// Compared to word-boundary case, they don't accompany single-character gaps
 	// (e.g. FooBar vs. foo-bar), so we deduct bonus point accordingly.
-	bonusCamel123 = bonusBoundary + scoreGapExtention
+	bonusCamel123 = bonusBoundary + scoreGapExtension
 
 	// Minimum bonus point given to characters in consecutive chunks.
 	// Note that bonus points for consecutive matches shouldn't have needed if we
 	// used fixed match score as in the original algorithm.
-	bonusConsecutive = -(scoreGapStart + scoreGapExtention)
+	bonusConsecutive = -(scoreGapStart + scoreGapExtension)
 
 	// The first character in the typed pattern usually has more significance
 	// than the rest so it's important that it appears at special positions where
-	// bonus points are given. e.g. "to-go" vs. "ongoing" on "og" or on "ogo".
+	// bonus points are given, e.g. "to-go" vs. "ongoing" on "og" or on "ogo".
 	// The amount of the extra bonus should be limited so that the gap penalty is
 	// still respected.
 	bonusFirstCharMultiplier = 2
 )
 
+var (
+	// Extra bonus for word boundary after whitespace character or beginning of the string
+	bonusBoundaryWhite int16 = bonusBoundary + 2
+
+	// Extra bonus for word boundary after slash, colon, semi-colon, and comma
+	bonusBoundaryDelimiter int16 = bonusBoundary + 1
+
+	initialCharClass = charWhite
+
+	// A minor optimization that can give 15%+ performance boost
+	asciiCharClasses [unicode.MaxASCII + 1]charClass
+
+	// A minor optimization that can give yet another 5% performance boost
+	bonusMatrix [charNumber + 1][charNumber + 1]int16
+)
+
 type charClass int
 
 const (
-	charNonWord charClass = iota
+	charWhite charClass = iota
+	charNonWord
+	charDelimiter
 	charLower
 	charUpper
 	charLetter
 	charNumber
 )
 
+func Init(scheme string) bool {
+	switch scheme {
+	case "default":
+		bonusBoundaryWhite = bonusBoundary + 2
+		bonusBoundaryDelimiter = bonusBoundary + 1
+	case "path":
+		bonusBoundaryWhite = bonusBoundary
+		bonusBoundaryDelimiter = bonusBoundary + 1
+		if os.PathSeparator == '/' {
+			delimiterChars = "/"
+		} else {
+			delimiterChars = string([]rune{os.PathSeparator, '/'})
+		}
+		initialCharClass = charDelimiter
+	case "history":
+		bonusBoundaryWhite = bonusBoundary
+		bonusBoundaryDelimiter = bonusBoundary
+	default:
+		return false
+	}
+	for i := 0; i <= unicode.MaxASCII; i++ {
+		char := rune(i)
+		c := charNonWord
+		if char >= 'a' && char <= 'z' {
+			c = charLower
+		} else if char >= 'A' && char <= 'Z' {
+			c = charUpper
+		} else if char >= '0' && char <= '9' {
+			c = charNumber
+		} else if strings.ContainsRune(whiteChars, char) {
+			c = charWhite
+		} else if strings.ContainsRune(delimiterChars, char) {
+			c = charDelimiter
+		}
+		asciiCharClasses[i] = c
+	}
+	for i := 0; i <= int(charNumber); i++ {
+		for j := 0; j <= int(charNumber); j++ {
+			bonusMatrix[i][j] = bonusFor(charClass(i), charClass(j))
+		}
+	}
+	return true
+}
+
 func posArray(withPos bool, len int) *[]int {
 	if withPos {
 		pos := make([]int, 0, len)
@@ -156,43 +225,22 @@ func posArray(withPos bool, len int) *[]int {
 	return nil
 }
 
-func alloc16(offset int, slab *util.Slab, size int, clear bool) (int, []int16) {
+func alloc16(offset int, slab *util.Slab, size int) (int, []int16) {
 	if slab != nil && cap(slab.I16) > offset+size {
 		slice := slab.I16[offset : offset+size]
-		if clear {
-			for idx := range slice {
-				slice[idx] = 0
-			}
-		}
 		return offset + size, slice
 	}
 	return offset, make([]int16, size)
 }
 
-func alloc32(offset int, slab *util.Slab, size int, clear bool) (int, []int32) {
+func alloc32(offset int, slab *util.Slab, size int) (int, []int32) {
 	if slab != nil && cap(slab.I32) > offset+size {
 		slice := slab.I32[offset : offset+size]
-		if clear {
-			for idx := range slice {
-				slice[idx] = 0
-			}
-		}
 		return offset + size, slice
 	}
 	return offset, make([]int32, size)
 }
 
-func charClassOfAscii(char rune) charClass {
-	if char >= 'a' && char <= 'z' {
-		return charLower
-	} else if char >= 'A' && char <= 'Z' {
-		return charUpper
-	} else if char >= '0' && char <= '9' {
-		return charNumber
-	}
-	return charNonWord
-}
-
 func charClassOfNonAscii(char rune) charClass {
 	if unicode.IsLower(char) {
 		return charLower
@@ -202,36 +250,56 @@ func charClassOfNonAscii(char rune) charClass {
 		return charNumber
 	} else if unicode.IsLetter(char) {
 		return charLetter
+	} else if unicode.IsSpace(char) {
+		return charWhite
+	} else if strings.ContainsRune(delimiterChars, char) {
+		return charDelimiter
 	}
 	return charNonWord
 }
 
 func charClassOf(char rune) charClass {
 	if char <= unicode.MaxASCII {
-		return charClassOfAscii(char)
+		return asciiCharClasses[char]
 	}
 	return charClassOfNonAscii(char)
 }
 
 func bonusFor(prevClass charClass, class charClass) int16 {
-	if prevClass == charNonWord && class != charNonWord {
-		// Word boundary
-		return bonusBoundary
-	} else if prevClass == charLower && class == charUpper ||
+	if class > charNonWord {
+		switch prevClass {
+		case charWhite:
+			// Word boundary after whitespace
+			return bonusBoundaryWhite
+		case charDelimiter:
+			// Word boundary after a delimiter character
+			return bonusBoundaryDelimiter
+		case charNonWord:
+			// Word boundary
+			return bonusBoundary
+		}
+	}
+
+	if prevClass == charLower && class == charUpper ||
 		prevClass != charNumber && class == charNumber {
 		// camelCase letter123
 		return bonusCamel123
-	} else if class == charNonWord {
+	}
+
+	switch class {
+	case charNonWord, charDelimiter:
 		return bonusNonWord
+	case charWhite:
+		return bonusBoundaryWhite
 	}
 	return 0
 }
 
-func bonusAt(input util.Chars, idx int) int16 {
+func bonusAt(input *util.Chars, idx int) int16 {
 	if idx == 0 {
-		return bonusBoundary
+		return bonusBoundaryWhite
 	}
-	return bonusFor(charClassOf(input.Get(idx-1)), charClassOf(input.Get(idx)))
+	return bonusMatrix[charClassOf(input.Get(idx-1))][charClassOf(input.Get(idx))]
 }
 
 func normalizeRune(r rune) rune {
@@ -249,20 +317,130 @@ func normalizeRune(r rune) rune {
 // Algo functions make two assumptions
 // 1. "pattern" is given in lowercase if "caseSensitive" is false
 // 2. "pattern" is already normalized if "normalize" is true
-type Algo func(caseSensitive bool, normalize bool, forward bool, input util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int)
+type Algo func(caseSensitive bool, normalize bool, forward bool, input *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int)
 
-func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+func trySkip(input *util.Chars, caseSensitive bool, b byte, from int) int {
+	byteArray := input.Bytes()[from:]
+	idx := bytes.IndexByte(byteArray, b)
+	if idx == 0 {
+		// Can't skip any further
+		return from
+	}
+	// We may need to search for the uppercase letter again. We don't have to
+	// consider normalization as we can be sure that this is an ASCII string.
+	if !caseSensitive && b >= 'a' && b <= 'z' {
+		if idx > 0 {
+			byteArray = byteArray[:idx]
+		}
+		uidx := bytes.IndexByte(byteArray, b-32)
+		if uidx >= 0 {
+			idx = uidx
+		}
+	}
+	if idx < 0 {
+		return -1
+	}
+	return from + idx
+}
+
+func isAscii(runes []rune) bool {
+	for _, r := range runes {
+		if r >= utf8.RuneSelf {
+			return false
+		}
+	}
+	return true
+}
+
+func asciiFuzzyIndex(input *util.Chars, pattern []rune, caseSensitive bool) (int, int) {
+	// Can't determine
+	if !input.IsBytes() {
+		return 0, input.Length()
+	}
+
+	// Not possible
+	if !isAscii(pattern) {
+		return -1, -1
+	}
+
+	firstIdx, idx, lastIdx := 0, 0, 0
+	var b byte
+	for pidx := 0; pidx < len(pattern); pidx++ {
+		b = byte(pattern[pidx])
+		idx = trySkip(input, caseSensitive, b, idx)
+		if idx < 0 {
+			return -1, -1
+		}
+		if pidx == 0 && idx > 0 {
+			// Step back to find the right bonus point
+			firstIdx = idx - 1
+		}
+		lastIdx = idx
+		idx++
+	}
+
+	// Find the last appearance of the last character of the pattern to limit the search scope
+	bu := b
+	if !caseSensitive && b >= 'a' && b <= 'z' {
+		bu = b - 32
+	}
+	scope := input.Bytes()[lastIdx:]
+	for offset := len(scope) - 1; offset > 0; offset-- {
+		if scope[offset] == b || scope[offset] == bu {
+			return firstIdx, lastIdx + offset + 1
+		}
+	}
+	return firstIdx, lastIdx + 1
+}
+
+func debugV2(T []rune, pattern []rune, F []int32, lastIdx int, H []int16, C []int16) {
+	width := lastIdx - int(F[0]) + 1
+
+	for i, f := range F {
+		I := i * width
+		if i == 0 {
+			fmt.Print("  ")
+			for j := int(f); j <= lastIdx; j++ {
+				fmt.Print(" " + string(T[j]) + " ")
+			}
+			fmt.Println()
+		}
+		fmt.Print(string(pattern[i]) + " ")
+		for idx := int(F[0]); idx < int(f); idx++ {
+			fmt.Print(" 0 ")
+		}
+		for idx := int(f); idx <= lastIdx; idx++ {
+			fmt.Printf("%2d ", H[i*width+idx-int(F[0])])
+		}
+		fmt.Println()
+
+		fmt.Print("  ")
+		for idx, p := range C[I : I+width] {
+			if idx+int(F[0]) < int(F[i]) {
+				p = 0
+			}
+			if p > 0 {
+				fmt.Printf("%2d ", p)
+			} else {
+				fmt.Print("   ")
+			}
+		}
+		fmt.Println()
+	}
+}
+
+func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
 	// Assume that pattern is given in lowercase if case-insensitive.
 	// First check if there's a match and calculate bonus for each position.
 	// If the input string is too long, consider finding the matching chars in
 	// this phase as well (non-optimal alignment).
-	N := input.Length()
 	M := len(pattern)
-	switch M {
-	case 0:
+	if M == 0 {
 		return Result{0, 0, 0}, posArray(withPos, M)
-	case 1:
-		return ExactMatchNaive(caseSensitive, normalize, forward, input, pattern[0:1], withPos, slab)
+	}
+	N := input.Length()
+	if M > N {
+		return Result{-1, -1, 0}, nil
 	}
 
 	// Since O(nm) algorithm can be prohibitively expensive for large input,
@@ -271,158 +449,179 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input util.C
 		return FuzzyMatchV1(caseSensitive, normalize, forward, input, pattern, withPos, slab)
 	}
 
+	// Phase 1. Optimized search for ASCII string
+	minIdx, maxIdx := asciiFuzzyIndex(input, pattern, caseSensitive)
+	if minIdx < 0 {
+		return Result{-1, -1, 0}, nil
+	}
+	// fmt.Println(N, maxIdx, idx, maxIdx-idx, input.ToString())
+	N = maxIdx - minIdx
+
 	// Reuse pre-allocated integer slice to avoid unnecessary sweeping of garbages
 	offset16 := 0
 	offset32 := 0
+	offset16, H0 := alloc16(offset16, slab, N)
+	offset16, C0 := alloc16(offset16, slab, N)
 	// Bonus point for each position
-	offset16, B := alloc16(offset16, slab, N, false)
+	offset16, B := alloc16(offset16, slab, N)
 	// The first occurrence of each character in the pattern
-	offset32, F := alloc32(offset32, slab, M, false)
+	offset32, F := alloc32(offset32, slab, M)
 	// Rune array
-	offset32, T := alloc32(offset32, slab, N, false)
+	_, T := alloc32(offset32, slab, N)
+	input.CopyRunes(T, minIdx)
 
-	// Phase 1. Check if there's a match and calculate bonus for each point
-	pidx, lastIdx, prevClass := 0, 0, charNonWord
-	for idx := 0; idx < N; idx++ {
-		char := input.Get(idx)
+	// Phase 2. Calculate bonus for each point
+	maxScore, maxScorePos := int16(0), 0
+	pidx, lastIdx := 0, 0
+	pchar0, pchar, prevH0, prevClass, inGap := pattern[0], pattern[0], int16(0), initialCharClass, false
+	for off, char := range T {
 		var class charClass
 		if char <= unicode.MaxASCII {
-			class = charClassOfAscii(char)
+			class = asciiCharClasses[char]
+			if !caseSensitive && class == charUpper {
+				char += 32
+				T[off] = char
+			}
 		} else {
 			class = charClassOfNonAscii(char)
-		}
-
-		if !caseSensitive && class == charUpper {
-			if char <= unicode.MaxASCII {
-				char += 32
-			} else {
+			if !caseSensitive && class == charUpper {
 				char = unicode.To(unicode.LowerCase, char)
 			}
+			if normalize {
+				char = normalizeRune(char)
+			}
+			T[off] = char
 		}
 
-		if normalize {
-			char = normalizeRune(char)
-		}
-
-		T[idx] = char
-		B[idx] = bonusFor(prevClass, class)
+		bonus := bonusMatrix[prevClass][class]
+		B[off] = bonus
 		prevClass = class
 
-		if pidx < M {
-			if char == pattern[pidx] {
-				lastIdx = idx
-				F[pidx] = int32(idx)
+		if char == pchar {
+			if pidx < M {
+				F[pidx] = int32(off)
 				pidx++
+				pchar = pattern[util.Min(pidx, M-1)]
 			}
-		} else {
-			if char == pattern[M-1] {
-				lastIdx = idx
-			}
+			lastIdx = off
 		}
+
+		if char == pchar0 {
+			score := scoreMatch + bonus*bonusFirstCharMultiplier
+			H0[off] = score
+			C0[off] = 1
+			if M == 1 && (forward && score > maxScore || !forward && score >= maxScore) {
+				maxScore, maxScorePos = score, off
+				if forward && bonus >= bonusBoundary {
+					break
+				}
+			}
+			inGap = false
+		} else {
+			if inGap {
+				H0[off] = util.Max16(prevH0+scoreGapExtension, 0)
+			} else {
+				H0[off] = util.Max16(prevH0+scoreGapStart, 0)
+			}
+			C0[off] = 0
+			inGap = true
+		}
+		prevH0 = H0[off]
 	}
 	if pidx != M {
 		return Result{-1, -1, 0}, nil
 	}
+	if M == 1 {
+		result := Result{minIdx + maxScorePos, minIdx + maxScorePos + 1, int(maxScore)}
+		if !withPos {
+			return result, nil
+		}
+		pos := []int{minIdx + maxScorePos}
+		return result, &pos
+	}
 
-	// Phase 2. Fill in score matrix (H)
+	// Phase 3. Fill in score matrix (H)
 	// Unlike the original algorithm, we do not allow omission.
-	width := lastIdx - int(F[0]) + 1
-	offset16, H := alloc16(offset16, slab, width*M, false)
+	f0 := int(F[0])
+	width := lastIdx - f0 + 1
+	offset16, H := alloc16(offset16, slab, width*M)
+	copy(H, H0[f0:lastIdx+1])
 
 	// Possible length of consecutive chunk at each position.
-	offset16, C := alloc16(offset16, slab, width*M, false)
+	_, C := alloc16(offset16, slab, width*M)
+	copy(C, C0[f0:lastIdx+1])
 
-	maxScore, maxScorePos := int16(0), 0
-	for i := 0; i < M; i++ {
-		I := i * width
+	Fsub := F[1:]
+	Psub := pattern[1:][:len(Fsub)]
+	for off, f := range Fsub {
+		f := int(f)
+		pchar := Psub[off]
+		pidx := off + 1
+		row := pidx * width
 		inGap := false
-		for j := int(F[i]); j <= lastIdx; j++ {
-			j0 := j - int(F[0])
+		Tsub := T[f : lastIdx+1]
+		Bsub := B[f:][:len(Tsub)]
+		Csub := C[row+f-f0:][:len(Tsub)]
+		Cdiag := C[row+f-f0-1-width:][:len(Tsub)]
+		Hsub := H[row+f-f0:][:len(Tsub)]
+		Hdiag := H[row+f-f0-1-width:][:len(Tsub)]
+		Hleft := H[row+f-f0-1:][:len(Tsub)]
+		Hleft[0] = 0
+		for off, char := range Tsub {
+			col := off + f
 			var s1, s2, consecutive int16
 
-			if j > int(F[i]) {
-				if inGap {
-					s2 = H[I+j0-1] + scoreGapExtention
-				} else {
-					s2 = H[I+j0-1] + scoreGapStart
-				}
+			if inGap {
+				s2 = Hleft[off] + scoreGapExtension
+			} else {
+				s2 = Hleft[off] + scoreGapStart
 			}
 
-			if pattern[i] == T[j] {
-				var diag int16
-				if i > 0 && j0 > 0 {
-					diag = H[I-width+j0-1]
-				}
-				s1 = diag + scoreMatch
-				b := B[j]
-				if i > 0 {
-					// j > 0 if i > 0
-					consecutive = C[I-width+j0-1] + 1
+			if pchar == char {
+				s1 = Hdiag[off] + scoreMatch
+				b := Bsub[off]
+				consecutive = Cdiag[off] + 1
+				if consecutive > 1 {
+					fb := B[col-int(consecutive)+1]
 					// Break consecutive chunk
-					if b == bonusBoundary {
+					if b >= bonusBoundary && b > fb {
 						consecutive = 1
-					} else if consecutive > 1 {
-						b = util.Max16(b, util.Max16(bonusConsecutive, B[j-int(consecutive)+1]))
+					} else {
+						b = util.Max16(b, util.Max16(bonusConsecutive, fb))
 					}
-				} else {
-					consecutive = 1
-					b *= bonusFirstCharMultiplier
 				}
 				if s1+b < s2 {
-					s1 += B[j]
+					s1 += Bsub[off]
 					consecutive = 0
 				} else {
 					s1 += b
 				}
 			}
-			C[I+j0] = consecutive
+			Csub[off] = consecutive
 
 			inGap = s1 < s2
 			score := util.Max16(util.Max16(s1, s2), 0)
-			if i == M-1 && (forward && score > maxScore || !forward && score >= maxScore) {
-				maxScore, maxScorePos = score, j
+			if pidx == M-1 && (forward && score > maxScore || !forward && score >= maxScore) {
+				maxScore, maxScorePos = score, col
 			}
-			H[I+j0] = score
-		}
-
-		if DEBUG {
-			if i == 0 {
-				fmt.Print("  ")
-				for j := int(F[i]); j <= lastIdx; j++ {
-					fmt.Printf(" " + string(input.Get(j)) + " ")
-				}
-				fmt.Println()
-			}
-			fmt.Print(string(pattern[i]) + " ")
-			for idx := int(F[0]); idx < int(F[i]); idx++ {
-				fmt.Print(" 0 ")
-			}
-			for idx := int(F[i]); idx <= lastIdx; idx++ {
-				fmt.Printf("%2d ", H[i*width+idx-int(F[0])])
-			}
-			fmt.Println()
-
-			fmt.Print("  ")
-			for idx, p := range C[I : I+width] {
-				if idx+int(F[0]) < int(F[i]) {
-					p = 0
-				}
-				fmt.Printf("%2d ", p)
-			}
-			fmt.Println()
+			Hsub[off] = score
 		}
 	}
 
-	// Phase 3. (Optional) Backtrace to find character positions
+	if DEBUG {
+		debugV2(T, pattern, F, lastIdx, H, C)
+	}
+
+	// Phase 4. (Optional) Backtrace to find character positions
 	pos := posArray(withPos, M)
-	j := int(F[0])
+	j := f0
 	if withPos {
 		i := M - 1
 		j = maxScorePos
 		preferMatch := true
 		for {
 			I := i * width
-			j0 := j - int(F[0])
+			j0 := j - f0
 			s := H[I+j0]
 
 			var s1, s2 int16
@@ -434,7 +633,7 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input util.C
 			}
 
 			if s > s1 && (s > s2 || s == s2 && preferMatch) {
-				*pos = append(*pos, j)
+				*pos = append(*pos, j+minIdx)
 				if i == 0 {
 					break
 				}
@@ -447,14 +646,14 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input util.C
 	// Start offset we return here is only relevant when begin tiebreak is used.
 	// However finding the accurate offset requires backtracking, and we don't
 	// want to pay extra cost for the option that has lost its importance.
-	return Result{j, maxScorePos + 1, int(maxScore)}, pos
+	return Result{minIdx + j, minIdx + maxScorePos + 1, int(maxScore)}, pos
 }
 
 // Implement the same sorting criteria as V2
-func calculateScore(caseSensitive bool, normalize bool, text util.Chars, pattern []rune, sidx int, eidx int, withPos bool) (int, *[]int) {
+func calculateScore(caseSensitive bool, normalize bool, text *util.Chars, pattern []rune, sidx int, eidx int, withPos bool) (int, *[]int) {
 	pidx, score, inGap, consecutive, firstBonus := 0, 0, false, 0, int16(0)
 	pos := posArray(withPos, len(pattern))
-	prevClass := charNonWord
+	prevClass := initialCharClass
 	if sidx > 0 {
 		prevClass = charClassOf(text.Get(sidx - 1))
 	}
@@ -477,12 +676,12 @@ func calculateScore(caseSensitive bool, normalize bool, text util.Chars, pattern
 				*pos = append(*pos, idx)
 			}
 			score += scoreMatch
-			bonus := bonusFor(prevClass, class)
+			bonus := bonusMatrix[prevClass][class]
 			if consecutive == 0 {
 				firstBonus = bonus
 			} else {
 				// Break consecutive chunk
-				if bonus == bonusBoundary {
+				if bonus >= bonusBoundary && bonus > firstBonus {
 					firstBonus = bonus
 				}
 				bonus = util.Max16(util.Max16(bonus, firstBonus), bonusConsecutive)
@@ -497,7 +696,7 @@ func calculateScore(caseSensitive bool, normalize bool, text util.Chars, pattern
 			pidx++
 		} else {
 			if inGap {
-				score += scoreGapExtention
+				score += scoreGapExtension
 			} else {
 				score += scoreGapStart
 			}
@@ -511,10 +710,14 @@ func calculateScore(caseSensitive bool, normalize bool, text util.Chars, pattern
 }
 
 // FuzzyMatchV1 performs fuzzy-match
-func FuzzyMatchV1(caseSensitive bool, normalize bool, forward bool, text util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+func FuzzyMatchV1(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
 	if len(pattern) == 0 {
 		return Result{0, 0, 0}, nil
 	}
+	idx, _ := asciiFuzzyIndex(text, pattern, caseSensitive)
+	if idx < 0 {
+		return Result{-1, -1, 0}, nil
+	}
 
 	pidx := 0
 	sidx := -1
@@ -564,6 +767,9 @@ func FuzzyMatchV1(caseSensitive bool, normalize bool, forward bool, text util.Ch
 					char = unicode.To(unicode.LowerCase, char)
 				}
 			}
+			if normalize {
+				char = normalizeRune(char)
+			}
 
 			pidx_ := indexAt(pidx, lenPattern, forward)
 			pchar := pattern[pidx_]
@@ -594,7 +800,15 @@ func FuzzyMatchV1(caseSensitive bool, normalize bool, forward bool, text util.Ch
 // bonus point, instead of stopping immediately after finding the first match.
 // The solution is much cheaper since there is only one possible alignment of
 // the pattern.
-func ExactMatchNaive(caseSensitive bool, normalize bool, forward bool, text util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+func ExactMatchNaive(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	return exactMatchNaive(caseSensitive, normalize, forward, false, text, pattern, withPos, slab)
+}
+
+func ExactMatchBoundary(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	return exactMatchNaive(caseSensitive, normalize, forward, true, text, pattern, withPos, slab)
+}
+
+func exactMatchNaive(caseSensitive bool, normalize bool, forward bool, boundaryCheck bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
 	if len(pattern) == 0 {
 		return Result{0, 0, 0}, nil
 	}
@@ -606,6 +820,11 @@ func ExactMatchNaive(caseSensitive bool, normalize bool, forward bool, text util
 		return Result{-1, -1, 0}, nil
 	}
 
+	idx, _ := asciiFuzzyIndex(text, pattern, caseSensitive)
+	if idx < 0 {
+		return Result{-1, -1, 0}, nil
+	}
+
 	// For simplicity, only look at the bonus at the first character position
 	pidx := 0
 	bestPos, bonus, bestBonus := -1, int16(0), int16(-1)
@@ -624,16 +843,28 @@ func ExactMatchNaive(caseSensitive bool, normalize bool, forward bool, text util
 		}
 		pidx_ := indexAt(pidx, lenPattern, forward)
 		pchar := pattern[pidx_]
-		if pchar == char {
+		ok := pchar == char
+		if ok {
 			if pidx_ == 0 {
 				bonus = bonusAt(text, index_)
 			}
+			if boundaryCheck {
+				ok = bonus >= bonusBoundary
+				if ok && pidx_ == 0 {
+					ok = index_ == 0 || charClassOf(text.Get(index_-1)) <= charDelimiter
+				}
+				if ok && pidx_ == len(pattern)-1 {
+					ok = index_ == lenRunes-1 || charClassOf(text.Get(index_+1)) <= charDelimiter
+				}
+			}
+		}
+		if ok {
 			pidx++
 			if pidx == lenPattern {
 				if bonus > bestBonus {
 					bestPos, bestBonus = index, bonus
 				}
-				if bonus == bonusBoundary {
+				if bonus >= bonusBoundary {
 					break
 				}
 				index -= pidx - 1
@@ -653,24 +884,45 @@ func ExactMatchNaive(caseSensitive bool, normalize bool, forward bool, text util
 			sidx = lenRunes - (bestPos + 1)
 			eidx = lenRunes - (bestPos - lenPattern + 1)
 		}
-		score, _ := calculateScore(caseSensitive, normalize, text, pattern, sidx, eidx, false)
+		var score int
+		if boundaryCheck {
+			// Underscore boundaries should be ranked lower than the other types of boundaries
+			score = int(bonus)
+			deduct := int(bonus-bonusBoundary) + 1
+			if sidx > 0 && text.Get(sidx-1) == '_' {
+				score -= deduct + 1
+				deduct = 1
+			}
+			if eidx < lenRunes && text.Get(eidx) == '_' {
+				score -= deduct
+			}
+			// Add base score so that this can compete with other match types e.g. 'foo' | bar
+			score += scoreMatch*lenPattern + int(bonusBoundaryWhite)*(lenPattern+1)
+		} else {
+			score, _ = calculateScore(caseSensitive, normalize, text, pattern, sidx, eidx, false)
+		}
 		return Result{sidx, eidx, score}, nil
 	}
 	return Result{-1, -1, 0}, nil
 }
 
 // PrefixMatch performs prefix-match
-func PrefixMatch(caseSensitive bool, normalize bool, forward bool, text util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+func PrefixMatch(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
 	if len(pattern) == 0 {
 		return Result{0, 0, 0}, nil
 	}
 
-	if text.Length() < len(pattern) {
+	trimmedLen := 0
+	if !unicode.IsSpace(pattern[0]) {
+		trimmedLen = text.LeadingWhitespaces()
+	}
+
+	if text.Length()-trimmedLen < len(pattern) {
 		return Result{-1, -1, 0}, nil
 	}
 
 	for index, r := range pattern {
-		char := text.Get(index)
+		char := text.Get(trimmedLen + index)
 		if !caseSensitive {
 			char = unicode.ToLower(char)
 		}
@@ -682,14 +934,17 @@ func PrefixMatch(caseSensitive bool, normalize bool, forward bool, text util.Cha
 		}
 	}
 	lenPattern := len(pattern)
-	score, _ := calculateScore(caseSensitive, normalize, text, pattern, 0, lenPattern, false)
-	return Result{0, lenPattern, score}, nil
+	score, _ := calculateScore(caseSensitive, normalize, text, pattern, trimmedLen, trimmedLen+lenPattern, false)
+	return Result{trimmedLen, trimmedLen + lenPattern, score}, nil
 }
 
 // SuffixMatch performs suffix-match
-func SuffixMatch(caseSensitive bool, normalize bool, forward bool, text util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+func SuffixMatch(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
 	lenRunes := text.Length()
-	trimmedLen := lenRunes - text.TrailingWhitespaces()
+	trimmedLen := lenRunes
+	if len(pattern) == 0 || !unicode.IsSpace(pattern[len(pattern)-1]) {
+		trimmedLen -= text.TrailingWhitespaces()
+	}
 	if len(pattern) == 0 {
 		return Result{trimmedLen, trimmedLen, 0}, nil
 	}
@@ -718,16 +973,32 @@ func SuffixMatch(caseSensitive bool, normalize bool, forward bool, text util.Cha
 }
 
 // EqualMatch performs equal-match
-func EqualMatch(caseSensitive bool, normalize bool, forward bool, text util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+func EqualMatch(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
 	lenPattern := len(pattern)
-	if text.Length() != lenPattern {
+	if lenPattern == 0 {
+		return Result{-1, -1, 0}, nil
+	}
+
+	// Strip leading whitespaces
+	trimmedLen := 0
+	if !unicode.IsSpace(pattern[0]) {
+		trimmedLen = text.LeadingWhitespaces()
+	}
+
+	// Strip trailing whitespaces
+	trimmedEndLen := 0
+	if !unicode.IsSpace(pattern[lenPattern-1]) {
+		trimmedEndLen = text.TrailingWhitespaces()
+	}
+
+	if text.Length()-trimmedLen-trimmedEndLen != lenPattern {
 		return Result{-1, -1, 0}, nil
 	}
 	match := true
 	if normalize {
 		runes := text.ToRunes()
 		for idx, pchar := range pattern {
-			char := runes[idx]
+			char := runes[trimmedLen+idx]
 			if !caseSensitive {
 				char = unicode.To(unicode.LowerCase, char)
 			}
@@ -737,15 +1008,16 @@ func EqualMatch(caseSensitive bool, normalize bool, forward bool, text util.Char
 			}
 		}
 	} else {
-		runesStr := text.ToString()
+		runes := text.ToRunes()
+		runesStr := string(runes[trimmedLen : len(runes)-trimmedEndLen])
 		if !caseSensitive {
 			runesStr = strings.ToLower(runesStr)
 		}
 		match = runesStr == string(pattern)
 	}
 	if match {
-		return Result{0, lenPattern, (scoreMatch+bonusBoundary)*lenPattern +
-			(bonusFirstCharMultiplier-1)*bonusBoundary}, nil
+		return Result{trimmedLen, trimmedLen + lenPattern, (scoreMatch+int(bonusBoundaryWhite))*lenPattern +
+			(bonusFirstCharMultiplier-1)*int(bonusBoundaryWhite)}, nil
 	}
 	return Result{-1, -1, 0}, nil
 }

src/algo/algo_test.go

@@ -9,6 +9,10 @@ import (
 	"github.com/junegunn/fzf/src/util"
 )
 
+func init() {
+	Init("default")
+}
+
 func assertMatch(t *testing.T, fun Algo, caseSensitive, forward bool, input, pattern string, sidx int, eidx int, score int) {
 	assertMatch2(t, fun, caseSensitive, false, forward, input, pattern, sidx, eidx, score)
 }
@@ -17,7 +21,8 @@ func assertMatch2(t *testing.T, fun Algo, caseSensitive, normalize, forward bool
 	if !caseSensitive {
 		pattern = strings.ToLower(pattern)
 	}
-	res, pos := fun(caseSensitive, normalize, forward, util.RunesToChars([]rune(input)), []rune(pattern), true, nil)
+	chars := util.ToChars([]byte(input))
+	res, pos := fun(caseSensitive, normalize, forward, &chars, []rune(pattern), true, nil)
 	var start, end int
 	if pos == nil || len(*pos) == 0 {
 		start = res.Start
@@ -42,46 +47,46 @@ func TestFuzzyMatch(t *testing.T) {
 	for _, fn := range []Algo{FuzzyMatchV1, FuzzyMatchV2} {
 		for _, forward := range []bool{true, false} {
 			assertMatch(t, fn, false, forward, "fooBarbaz1", "oBZ", 2, 9,
-				scoreMatch*3+bonusCamel123+scoreGapStart+scoreGapExtention*3)
+				scoreMatch*3+bonusCamel123+scoreGapStart+scoreGapExtension*3)
 			assertMatch(t, fn, false, forward, "foo bar baz", "fbb", 0, 9,
-				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+
-					bonusBoundary*2+2*scoreGapStart+4*scoreGapExtention)
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+
+					int(bonusBoundaryWhite)*2+2*scoreGapStart+4*scoreGapExtension)
 			assertMatch(t, fn, false, forward, "/AutomatorDocument.icns", "rdoc", 9, 13,
 				scoreMatch*4+bonusCamel123+bonusConsecutive*2)
 			assertMatch(t, fn, false, forward, "/man1/zshcompctl.1", "zshc", 6, 10,
-				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*3)
+				scoreMatch*4+int(bonusBoundaryDelimiter)*bonusFirstCharMultiplier+int(bonusBoundaryDelimiter)*3)
 			assertMatch(t, fn, false, forward, "/.oh-my-zsh/cache", "zshc", 8, 13,
-				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*3+scoreGapStart)
+				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*2+scoreGapStart+int(bonusBoundaryDelimiter))
 			assertMatch(t, fn, false, forward, "ab0123 456", "12356", 3, 10,
-				scoreMatch*5+bonusConsecutive*3+scoreGapStart+scoreGapExtention)
+				scoreMatch*5+bonusConsecutive*3+scoreGapStart+scoreGapExtension)
 			assertMatch(t, fn, false, forward, "abc123 456", "12356", 3, 10,
-				scoreMatch*5+bonusCamel123*bonusFirstCharMultiplier+bonusCamel123*2+bonusConsecutive+scoreGapStart+scoreGapExtention)
+				scoreMatch*5+bonusCamel123*bonusFirstCharMultiplier+bonusCamel123*2+bonusConsecutive+scoreGapStart+scoreGapExtension)
 			assertMatch(t, fn, false, forward, "foo/bar/baz", "fbb", 0, 9,
-				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+
-					bonusBoundary*2+2*scoreGapStart+4*scoreGapExtention)
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+
+					int(bonusBoundaryDelimiter)*2+2*scoreGapStart+4*scoreGapExtension)
 			assertMatch(t, fn, false, forward, "fooBarBaz", "fbb", 0, 7,
-				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+
-					bonusCamel123*2+2*scoreGapStart+2*scoreGapExtention)
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+
+					bonusCamel123*2+2*scoreGapStart+2*scoreGapExtension)
 			assertMatch(t, fn, false, forward, "foo barbaz", "fbb", 0, 8,
-				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary+
-					scoreGapStart*2+scoreGapExtention*3)
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+int(bonusBoundaryWhite)+
+					scoreGapStart*2+scoreGapExtension*3)
 			assertMatch(t, fn, false, forward, "fooBar Baz", "foob", 0, 4,
-				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*3)
+				scoreMatch*4+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+int(bonusBoundaryWhite)*3)
 			assertMatch(t, fn, false, forward, "xFoo-Bar Baz", "foo-b", 1, 6,
 				scoreMatch*5+bonusCamel123*bonusFirstCharMultiplier+bonusCamel123*2+
 					bonusNonWord+bonusBoundary)
 
 			assertMatch(t, fn, true, forward, "fooBarbaz", "oBz", 2, 9,
-				scoreMatch*3+bonusCamel123+scoreGapStart+scoreGapExtention*3)
+				scoreMatch*3+bonusCamel123+scoreGapStart+scoreGapExtension*3)
 			assertMatch(t, fn, true, forward, "Foo/Bar/Baz", "FBB", 0, 9,
-				scoreMatch*3+bonusBoundary*(bonusFirstCharMultiplier+2)+
-					scoreGapStart*2+scoreGapExtention*4)
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+int(bonusBoundaryDelimiter)*2+
+					scoreGapStart*2+scoreGapExtension*4)
 			assertMatch(t, fn, true, forward, "FooBarBaz", "FBB", 0, 7,
-				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+bonusCamel123*2+
-					scoreGapStart*2+scoreGapExtention*2)
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+bonusCamel123*2+
+					scoreGapStart*2+scoreGapExtension*2)
 			assertMatch(t, fn, true, forward, "FooBar Baz", "FooB", 0, 4,
-				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*2+
-					util.Max(bonusCamel123, bonusBoundary))
+				scoreMatch*4+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+int(bonusBoundaryWhite)*2+
+					util.Max(bonusCamel123, int(bonusBoundaryWhite)))
 
 			// Consecutive bonus updated
 			assertMatch(t, fn, true, forward, "foo-bar", "o-ba", 2, 6,
@@ -97,10 +102,10 @@ func TestFuzzyMatch(t *testing.T) {
 
 func TestFuzzyMatchBackward(t *testing.T) {
 	assertMatch(t, FuzzyMatchV1, false, true, "foobar fb", "fb", 0, 4,
-		scoreMatch*2+bonusBoundary*bonusFirstCharMultiplier+
-			scoreGapStart+scoreGapExtention)
+		scoreMatch*2+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+
+			scoreGapStart+scoreGapExtension)
 	assertMatch(t, FuzzyMatchV1, false, false, "foobar fb", "fb", 7, 9,
-		scoreMatch*2+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary)
+		scoreMatch*2+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+int(bonusBoundaryWhite))
 }
 
 func TestExactMatchNaive(t *testing.T) {
@@ -113,9 +118,9 @@ func TestExactMatchNaive(t *testing.T) {
 		assertMatch(t, ExactMatchNaive, false, dir, "/AutomatorDocument.icns", "rdoc", 9, 13,
 			scoreMatch*4+bonusCamel123+bonusConsecutive*2)
 		assertMatch(t, ExactMatchNaive, false, dir, "/man1/zshcompctl.1", "zshc", 6, 10,
-			scoreMatch*4+bonusBoundary*(bonusFirstCharMultiplier+3))
+			scoreMatch*4+int(bonusBoundaryDelimiter)*(bonusFirstCharMultiplier+3))
 		assertMatch(t, ExactMatchNaive, false, dir, "/.oh-my-zsh/cache", "zsh/c", 8, 13,
-			scoreMatch*5+bonusBoundary*(bonusFirstCharMultiplier+4))
+			scoreMatch*5+bonusBoundary*(bonusFirstCharMultiplier+3)+int(bonusBoundaryDelimiter))
 	}
 }
 
@@ -127,7 +132,7 @@ func TestExactMatchNaiveBackward(t *testing.T) {
 }
 
 func TestPrefixMatch(t *testing.T) {
-	score := (scoreMatch+bonusBoundary)*3 + bonusBoundary*(bonusFirstCharMultiplier-1)
+	score := scoreMatch*3 + int(bonusBoundaryWhite)*bonusFirstCharMultiplier + int(bonusBoundaryWhite)*2
 
 	for _, dir := range []bool{true, false} {
 		assertMatch(t, PrefixMatch, true, dir, "fooBarbaz", "Foo", -1, -1, 0)
@@ -135,6 +140,10 @@ func TestPrefixMatch(t *testing.T) {
 		assertMatch(t, PrefixMatch, false, dir, "fooBarbaz", "Foo", 0, 3, score)
 		assertMatch(t, PrefixMatch, false, dir, "foOBarBaZ", "foo", 0, 3, score)
 		assertMatch(t, PrefixMatch, false, dir, "f-oBarbaz", "f-o", 0, 3, score)
+
+		assertMatch(t, PrefixMatch, false, dir, " fooBar", "foo", 1, 4, score)
+		assertMatch(t, PrefixMatch, false, dir, " fooBar", " fo", 0, 3, score)
+		assertMatch(t, PrefixMatch, false, dir, "     fo", "foo", -1, -1, 0)
 	}
 }
 
@@ -147,6 +156,14 @@ func TestSuffixMatch(t *testing.T) {
 			scoreMatch*3+bonusConsecutive*2)
 		assertMatch(t, SuffixMatch, false, dir, "fooBarBaZ", "baz", 6, 9,
 			(scoreMatch+bonusCamel123)*3+bonusCamel123*(bonusFirstCharMultiplier-1))
+
+		// Strip trailing white space from the string
+		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz ", "baz", 6, 9,
+			scoreMatch*3+bonusConsecutive*2)
+
+		// Only when the pattern doesn't end with a space
+		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz ", "baz ", 6, 10,
+			scoreMatch*4+bonusConsecutive*2+int(bonusBoundaryWhite))
 	}
 }
 
@@ -170,9 +187,9 @@ func TestNormalize(t *testing.T) {
 				input, pattern, sidx, eidx, score)
 		}
 	}
-	test("Só Danço Samba", "So", 0, 2, 56, FuzzyMatchV1, FuzzyMatchV2, PrefixMatch, ExactMatchNaive)
-	test("Só Danço Samba", "sodc", 0, 7, 89, FuzzyMatchV1, FuzzyMatchV2)
-	test("Danço", "danco", 0, 5, 128, FuzzyMatchV1, FuzzyMatchV2, PrefixMatch, SuffixMatch, ExactMatchNaive, EqualMatch)
+	test("Só Danço Samba", "So", 0, 2, 62, FuzzyMatchV1, FuzzyMatchV2, PrefixMatch, ExactMatchNaive)
+	test("Só Danço Samba", "sodc", 0, 7, 97, FuzzyMatchV1, FuzzyMatchV2)
+	test("Danço", "danco", 0, 5, 140, FuzzyMatchV1, FuzzyMatchV2, PrefixMatch, SuffixMatch, ExactMatchNaive, EqualMatch)
 }
 
 func TestLongString(t *testing.T) {
@@ -183,3 +200,12 @@ func TestLongString(t *testing.T) {
 	bytes[math.MaxUint16] = 'z'
 	assertMatch(t, FuzzyMatchV2, true, true, string(bytes), "zx", math.MaxUint16, math.MaxUint16+2, scoreMatch*2+bonusConsecutive)
 }
+
+func TestLongStringWithNormalize(t *testing.T) {
+	bytes := make([]byte, 30000)
+	for i := range bytes {
+		bytes[i] = 'x'
+	}
+	unicodeString := string(bytes) + " Minímal example"
+	assertMatch2(t, FuzzyMatchV1, false, true, false, unicodeString, "minim", 30001, 30006, 140)
+}

src/algo/normalize.go

@@ -3,7 +3,7 @@
 
 package algo
 
-var normalized map[rune]rune = map[rune]rune{
+var normalized = map[rune]rune{
 	0x00E1: 'a', //  WITH ACUTE, LATIN SMALL LETTER
 	0x0103: 'a', //  WITH BREVE, LATIN SMALL LETTER
 	0x01CE: 'a', //  WITH CARON, LATIN SMALL LETTER
@@ -405,6 +405,74 @@ var normalized map[rune]rune = map[rune]rune{
 	0x024E: 'Y', //  WITH STROKE, LATIN CAPITAL LETTER
 	0x028F: 'Y', // , LATIN LETTER SMALL CAPITAL
 	0x1D22: 'Z', // , LATIN LETTER SMALL CAPITAL
+
+	'Ắ': 'A',
+	'Ấ': 'A',
+	'Ằ': 'A',
+	'Ầ': 'A',
+	'Ẳ': 'A',
+	'Ẩ': 'A',
+	'Ẵ': 'A',
+	'Ẫ': 'A',
+	'Ặ': 'A',
+	'Ậ': 'A',
+
+	'ắ': 'a',
+	'ấ': 'a',
+	'ằ': 'a',
+	'ầ': 'a',
+	'ẳ': 'a',
+	'ẩ': 'a',
+	'ẵ': 'a',
+	'ẫ': 'a',
+	'ặ': 'a',
+	'ậ': 'a',
+
+	'Ế': 'E',
+	'Ề': 'E',
+	'Ể': 'E',
+	'Ễ': 'E',
+	'Ệ': 'E',
+
+	'ế': 'e',
+	'ề': 'e',
+	'ể': 'e',
+	'ễ': 'e',
+	'ệ': 'e',
+
+	'Ố': 'O',
+	'Ớ': 'O',
+	'Ồ': 'O',
+	'Ờ': 'O',
+	'Ổ': 'O',
+	'Ở': 'O',
+	'Ỗ': 'O',
+	'Ỡ': 'O',
+	'Ộ': 'O',
+	'Ợ': 'O',
+
+	'ố': 'o',
+	'ớ': 'o',
+	'ồ': 'o',
+	'ờ': 'o',
+	'ổ': 'o',
+	'ở': 'o',
+	'ỗ': 'o',
+	'ỡ': 'o',
+	'ộ': 'o',
+	'ợ': 'o',
+
+	'Ứ': 'U',
+	'Ừ': 'U',
+	'Ử': 'U',
+	'Ữ': 'U',
+	'Ự': 'U',
+
+	'ứ': 'u',
+	'ừ': 'u',
+	'ử': 'u',
+	'ữ': 'u',
+	'ự': 'u',
 }
 
 // NormalizeRunes normalizes latin script letters

src/ansi.go

@@ -1,8 +1,7 @@
 package fzf
 
 import (
-	"bytes"
-	"regexp"
+	"fmt"
 	"strconv"
 	"strings"
 	"unicode/utf8"
@@ -15,120 +14,383 @@ type ansiOffset struct {
 	color  ansiState
 }
 
+type url struct {
+	uri    string
+	params string
+}
+
 type ansiState struct {
 	fg   tui.Color
 	bg   tui.Color
 	attr tui.Attr
+	lbg  tui.Color
+	url  *url
 }
 
 func (s *ansiState) colored() bool {
-	return s.fg != -1 || s.bg != -1 || s.attr > 0
+	return s.fg != -1 || s.bg != -1 || s.attr > 0 || s.lbg >= 0 || s.url != nil
 }
 
 func (s *ansiState) equals(t *ansiState) bool {
 	if t == nil {
 		return !s.colored()
 	}
-	return s.fg == t.fg && s.bg == t.bg && s.attr == t.attr
+	return s.fg == t.fg && s.bg == t.bg && s.attr == t.attr && s.lbg == t.lbg && s.url == t.url
 }
 
-var ansiRegex *regexp.Regexp
+func (s *ansiState) ToString() string {
+	if !s.colored() {
+		return ""
+	}
 
-func init() {
-	/*
-		References:
-		- https://github.com/gnachman/iTerm2
-		- http://ascii-table.com/ansi-escape-sequences.php
-		- http://ascii-table.com/ansi-escape-sequences-vt-100.php
-		- http://tldp.org/HOWTO/Bash-Prompt-HOWTO/x405.html
-	*/
-	// The following regular expression will include not all but most of the
-	// frequently used ANSI sequences
-	ansiRegex = regexp.MustCompile("\x1b[\\[()][0-9;]*[a-zA-Z@]|\x1b.|[\x08\x0e\x0f]")
+	ret := ""
+	if s.attr&tui.Bold > 0 || s.attr&tui.BoldForce > 0 {
+		ret += "1;"
+	}
+	if s.attr&tui.Dim > 0 {
+		ret += "2;"
+	}
+	if s.attr&tui.Italic > 0 {
+		ret += "3;"
+	}
+	if s.attr&tui.Underline > 0 {
+		ret += "4;"
+	}
+	if s.attr&tui.Blink > 0 {
+		ret += "5;"
+	}
+	if s.attr&tui.Reverse > 0 {
+		ret += "7;"
+	}
+	if s.attr&tui.StrikeThrough > 0 {
+		ret += "9;"
+	}
+	ret += toAnsiString(s.fg, 30) + toAnsiString(s.bg, 40)
+
+	ret = "\x1b[" + strings.TrimSuffix(ret, ";") + "m"
+	if s.url != nil {
+		ret = fmt.Sprintf("\x1b]8;%s;%s\x1b\\%s\x1b]8;;\x1b", s.url.params, s.url.uri, ret)
+	}
+	return ret
+}
+
+func toAnsiString(color tui.Color, offset int) string {
+	col := int(color)
+	ret := ""
+	if col == -1 {
+		ret += strconv.Itoa(offset + 9)
+	} else if col < 8 {
+		ret += strconv.Itoa(offset + col)
+	} else if col < 16 {
+		ret += strconv.Itoa(offset - 30 + 90 + col - 8)
+	} else if col < 256 {
+		ret += strconv.Itoa(offset+8) + ";5;" + strconv.Itoa(col)
+	} else if col >= (1 << 24) {
+		r := strconv.Itoa((col >> 16) & 0xff)
+		g := strconv.Itoa((col >> 8) & 0xff)
+		b := strconv.Itoa(col & 0xff)
+		ret += strconv.Itoa(offset+8) + ";2;" + r + ";" + g + ";" + b
+	}
+	return ret + ";"
+}
+
+func isPrint(c uint8) bool {
+	return '\x20' <= c && c <= '\x7e'
+}
+
+func matchOperatingSystemCommand(s string, start int) int {
+	// `\x1b][0-9][;:][[:print:]]+(?:\x1b\\\\|\x07)`
+	//                 ^ match starting here after the first printable character
+	//
+	i := start // prefix matched in nextAnsiEscapeSequence()
+	for ; i < len(s) && isPrint(s[i]); i++ {
+	}
+	if i < len(s) {
+		if s[i] == '\x07' {
+			return i + 1
+		}
+		// `\x1b]8;PARAMS;URI\x1b\\TITLE\x1b]8;;\x1b`
+		//                   ------
+		if s[i] == '\x1b' && i < len(s)-1 && s[i+1] == '\\' {
+			return i + 2
+		}
+	}
+
+	// `\x1b]8;PARAMS;URI\x1b\\TITLE\x1b]8;;\x1b`
+	//                              ------------
+	if i < len(s) && s[:i+1] == "\x1b]8;;\x1b" {
+		return i + 1
+	}
+
+	return -1
+}
+
+func matchControlSequence(s string) int {
+	// `\x1b[\\[()][0-9;:?]*[a-zA-Z@]`
+	//                     ^ match starting here
+	//
+	i := 2 // prefix matched in nextAnsiEscapeSequence()
+	for ; i < len(s); i++ {
+		c := s[i]
+		switch c {
+		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ';', ':', '?':
+			// ok
+		default:
+			if 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || c == '@' {
+				return i + 1
+			}
+			return -1
+		}
+	}
+	return -1
+}
+
+func isCtrlSeqStart(c uint8) bool {
+	switch c {
+	case '\\', '[', '(', ')':
+		return true
+	}
+	return false
+}
+
+// nextAnsiEscapeSequence returns the ANSI escape sequence and is equivalent to
+// calling FindStringIndex() on the below regex (which was originally used):
+//
+// "(?:\x1b[\\[()][0-9;:?]*[a-zA-Z@]|\x1b][0-9]+[;:][[:print:]]+(?:\x1b\\\\|\x07)|\x1b.|[\x0e\x0f]|.\x08)"
+func nextAnsiEscapeSequence(s string) (int, int) {
+	// fast check for ANSI escape sequences
+	i := 0
+	for ; i < len(s); i++ {
+		switch s[i] {
+		case '\x0e', '\x0f', '\x1b', '\x08':
+			// We ignore the fact that '\x08' cannot be the first char
+			// in the string and be an escape sequence for the sake of
+			// speed and simplicity.
+			goto Loop
+		}
+	}
+	return -1, -1
+
+Loop:
+	for ; i < len(s); i++ {
+		switch s[i] {
+		case '\x08':
+			// backtrack to match: `.\x08`
+			if i > 0 && s[i-1] != '\n' {
+				if s[i-1] < utf8.RuneSelf {
+					return i - 1, i + 1
+				}
+				_, n := utf8.DecodeLastRuneInString(s[:i])
+				return i - n, i + 1
+			}
+		case '\x1b':
+			// match: `\x1b[\\[()][0-9;:?]*[a-zA-Z@]`
+			if i+2 < len(s) && isCtrlSeqStart(s[i+1]) {
+				if j := matchControlSequence(s[i:]); j != -1 {
+					return i, i + j
+				}
+			}
+
+			// match: `\x1b][0-9]+[;:][[:print:]]+(?:\x1b\\\\|\x07)`
+			if i+5 < len(s) && s[i+1] == ']' {
+				j := 2
+				// \x1b][0-9]+[;:][[:print:]]+(?:\x1b\\\\|\x07)
+				//      ------
+				for ; i+j < len(s) && isNumeric(s[i+j]); j++ {
+				}
+
+				// \x1b][0-9]+[;:][[:print:]]+(?:\x1b\\\\|\x07)
+				//            ---------------
+				if j > 2 && i+j+1 < len(s) && (s[i+j] == ';' || s[i+j] == ':') && isPrint(s[i+j+1]) {
+					if k := matchOperatingSystemCommand(s[i:], j+2); k != -1 {
+						return i, i + k
+					}
+				}
+			}
+
+			// match: `\x1b.`
+			if i+1 < len(s) && s[i+1] != '\n' {
+				if s[i+1] < utf8.RuneSelf {
+					return i, i + 2
+				}
+				_, n := utf8.DecodeRuneInString(s[i+1:])
+				return i, i + n + 1
+			}
+		case '\x0e', '\x0f':
+			// match: `[\x0e\x0f]`
+			return i, i + 1
+		}
+	}
+	return -1, -1
 }
 
 func extractColor(str string, state *ansiState, proc func(string, *ansiState) bool) (string, *[]ansiOffset, *ansiState) {
-	var offsets []ansiOffset
-	var output bytes.Buffer
+	// We append to a stack allocated variable that we'll
+	// later copy and return, to save on allocations.
+	offsets := make([]ansiOffset, 0, 32)
 
 	if state != nil {
 		offsets = append(offsets, ansiOffset{[2]int32{0, 0}, *state})
 	}
 
-	idx := 0
-	for _, offset := range ansiRegex.FindAllStringIndex(str, -1) {
-		prev := str[idx:offset[0]]
-		output.WriteString(prev)
+	var (
+		pstate    *ansiState // lazily allocated
+		output    strings.Builder
+		prevIdx   int
+		runeCount int
+	)
+	for idx := 0; idx < len(str); {
+		// Make sure that we found an ANSI code
+		start, end := nextAnsiEscapeSequence(str[idx:])
+		if start == -1 {
+			break
+		}
+		start += idx
+		idx += end
+
+		// Check if we should continue
+		prev := str[prevIdx:start]
 		if proc != nil && !proc(prev, state) {
 			return "", nil, nil
 		}
-		newState := interpretCode(str[offset[0]:offset[1]], state)
+		prevIdx = idx
 
+		if len(prev) != 0 {
+			runeCount += utf8.RuneCountInString(prev)
+			// Grow the buffer size to the maximum possible length (string length
+			// containing ansi codes) to avoid repetitive allocation
+			if output.Cap() == 0 {
+				output.Grow(len(str))
+			}
+			output.WriteString(prev)
+		}
+
+		newState := interpretCode(str[start:idx], state)
 		if !newState.equals(state) {
 			if state != nil {
 				// Update last offset
-				(&offsets[len(offsets)-1]).offset[1] = int32(utf8.RuneCount(output.Bytes()))
+				(&offsets[len(offsets)-1]).offset[1] = int32(runeCount)
 			}
 
 			if newState.colored() {
 				// Append new offset
-				state = newState
-				newLen := int32(utf8.RuneCount(output.Bytes()))
-				offsets = append(offsets, ansiOffset{[2]int32{newLen, newLen}, *state})
+				if pstate == nil {
+					pstate = &ansiState{}
+				}
+				*pstate = newState
+				state = pstate
+				offsets = append(offsets, ansiOffset{
+					[2]int32{int32(runeCount), int32(runeCount)},
+					newState,
+				})
 			} else {
 				// Discard state
 				state = nil
 			}
 		}
-
-		idx = offset[1]
 	}
 
-	rest := str[idx:]
-	if len(rest) > 0 {
+	var rest string
+	var trimmed string
+	if prevIdx == 0 {
+		// No ANSI code found
+		rest = str
+		trimmed = str
+	} else {
+		rest = str[prevIdx:]
 		output.WriteString(rest)
-		if state != nil {
-			// Update last offset
-			(&offsets[len(offsets)-1]).offset[1] = int32(utf8.RuneCount(output.Bytes()))
-		}
+		trimmed = output.String()
 	}
 	if proc != nil {
 		proc(rest, state)
 	}
-	if len(offsets) == 0 {
-		return output.String(), nil, state
+	if len(offsets) > 0 {
+		if len(rest) > 0 && state != nil {
+			// Update last offset
+			runeCount += utf8.RuneCountInString(rest)
+			(&offsets[len(offsets)-1]).offset[1] = int32(runeCount)
+		}
+		// Return a copy of the offsets slice
+		a := make([]ansiOffset, len(offsets))
+		copy(a, offsets)
+		return trimmed, &a, state
 	}
-	return output.String(), &offsets, state
+	return trimmed, nil, state
 }
 
-func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
-	// State
-	var state *ansiState
+func parseAnsiCode(s string) (int, string) {
+	var remaining string
+	var i int
+	// Faster than strings.IndexAny(";:")
+	i = strings.IndexByte(s, ';')
+	if i < 0 {
+		i = strings.IndexByte(s, ':')
+	}
+	if i >= 0 {
+		remaining = s[i+1:]
+		s = s[:i]
+	}
+
+	if len(s) > 0 {
+		// Inlined version of strconv.Atoi() that only handles positive
+		// integers and does not allocate on error.
+		code := 0
+		for _, ch := range stringBytes(s) {
+			ch -= '0'
+			if ch > 9 {
+				return -1, remaining
+			}
+			code = code*10 + int(ch)
+		}
+		return code, remaining
+	}
+
+	return -1, remaining
+}
+
+func interpretCode(ansiCode string, prevState *ansiState) ansiState {
+	var state ansiState
 	if prevState == nil {
-		state = &ansiState{-1, -1, 0}
+		state = ansiState{-1, -1, 0, -1, nil}
 	} else {
-		state = &ansiState{prevState.fg, prevState.bg, prevState.attr}
+		state = ansiState{prevState.fg, prevState.bg, prevState.attr, prevState.lbg, prevState.url}
 	}
 	if ansiCode[0] != '\x1b' || ansiCode[1] != '[' || ansiCode[len(ansiCode)-1] != 'm' {
+		if prevState != nil && strings.HasSuffix(ansiCode, "0K") {
+			state.lbg = prevState.bg
+		} else if strings.HasPrefix(ansiCode, "\x1b]8;") && (strings.HasSuffix(ansiCode, "\x1b\\") || strings.HasSuffix(ansiCode, "\a")) {
+			stLen := 2
+			if strings.HasSuffix(ansiCode, "\a") {
+				stLen = 1
+			}
+			// "\x1b]8;;\x1b\\" or "\x1b]8;;\a"
+			if len(ansiCode) == 5+stLen && ansiCode[4] == ';' {
+				state.url = nil
+			} else if paramsEnd := strings.IndexRune(ansiCode[4:], ';'); paramsEnd >= 0 {
+				params := ansiCode[4 : 4+paramsEnd]
+				uri := ansiCode[5+paramsEnd : len(ansiCode)-stLen]
+				state.url = &url{uri: uri, params: params}
+			}
+		}
 		return state
 	}
 
-	ptr := &state.fg
-	state256 := 0
-
-	init := func() {
+	if len(ansiCode) <= 3 {
 		state.fg = -1
 		state.bg = -1
 		state.attr = 0
-		state256 = 0
+		return state
 	}
-
 	ansiCode = ansiCode[2 : len(ansiCode)-1]
-	if len(ansiCode) == 0 {
-		init()
-	}
-	for _, code := range strings.Split(ansiCode, ";") {
-		if num, err := strconv.Atoi(code); err == nil {
+
+	state256 := 0
+	ptr := &state.fg
+
+	count := 0
+	for len(ansiCode) != 0 {
+		var num int
+		if num, ansiCode = parseAnsiCode(ansiCode); num != -1 {
+			count++
 			switch state256 {
 			case 0:
 				switch num {
@@ -154,8 +416,26 @@ func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
 					state.attr = state.attr | tui.Blink
 				case 7:
 					state.attr = state.attr | tui.Reverse
+				case 9:
+					state.attr = state.attr | tui.StrikeThrough
+				case 22:
+					state.attr = state.attr &^ tui.Bold
+					state.attr = state.attr &^ tui.Dim
+				case 23: // tput rmso
+					state.attr = state.attr &^ tui.Italic
+				case 24: // tput rmul
+					state.attr = state.attr &^ tui.Underline
+				case 25:
+					state.attr = state.attr &^ tui.Blink
+				case 27:
+					state.attr = state.attr &^ tui.Reverse
+				case 29:
+					state.attr = state.attr &^ tui.StrikeThrough
 				case 0:
-					init()
+					state.fg = -1
+					state.bg = -1
+					state.attr = 0
+					state256 = 0
 				default:
 					if num >= 30 && num <= 37 {
 						state.fg = tui.Color(num - 30)
@@ -191,6 +471,14 @@ func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
 			}
 		}
 	}
+
+	// Empty sequence: reset
+	if count == 0 {
+		state.fg = -1
+		state.bg = -1
+		state.attr = 0
+	}
+
 	if state256 > 0 {
 		*ptr = -1
 	}

src/ansi_test.go

@@ -1,12 +1,192 @@
 package fzf
 
 import (
-	"fmt"
+	"math/rand"
+	"regexp"
+	"strings"
 	"testing"
+	"unicode/utf8"
 
 	"github.com/junegunn/fzf/src/tui"
 )
 
+// The following regular expression will include not all but most of the
+// frequently used ANSI sequences. This regex is used as a reference for
+// testing nextAnsiEscapeSequence().
+//
+// References:
+//   - https://github.com/gnachman/iTerm2
+//   - https://web.archive.org/web/20090204053813/http://ascii-table.com/ansi-escape-sequences.php
+//     (archived from http://ascii-table.com/ansi-escape-sequences.php)
+//   - https://web.archive.org/web/20090227051140/http://ascii-table.com/ansi-escape-sequences-vt-100.php
+//     (archived from http://ascii-table.com/ansi-escape-sequences-vt-100.php)
+//   - http://tldp.org/HOWTO/Bash-Prompt-HOWTO/x405.html
+//   - https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+var ansiRegexReference = regexp.MustCompile("(?:\x1b[\\[()][0-9;:]*[a-zA-Z@]|\x1b][0-9][;:][[:print:]]+(?:\x1b\\\\|\x07)|\x1b.|[\x0e\x0f]|.\x08)")
+
+func testParserReference(t testing.TB, str string) {
+	t.Helper()
+
+	toSlice := func(start, end int) []int {
+		if start == -1 {
+			return nil
+		}
+		return []int{start, end}
+	}
+
+	s := str
+	for i := 0; ; i++ {
+		got := toSlice(nextAnsiEscapeSequence(s))
+		exp := ansiRegexReference.FindStringIndex(s)
+
+		equal := len(got) == len(exp)
+		if equal {
+			for i := 0; i < len(got); i++ {
+				if got[i] != exp[i] {
+					equal = false
+					break
+				}
+			}
+		}
+		if !equal {
+			var exps, gots []rune
+			if len(got) == 2 {
+				gots = []rune(s[got[0]:got[1]])
+			}
+			if len(exp) == 2 {
+				exps = []rune(s[exp[0]:exp[1]])
+			}
+			t.Errorf("%d: %q: got: %v (%q) want: %v (%q)", i, s, got, gots, exp, exps)
+			return
+		}
+		if len(exp) == 0 {
+			return
+		}
+		s = s[exp[1]:]
+	}
+}
+
+func TestNextAnsiEscapeSequence(t *testing.T) {
+	testStrs := []string{
+		"\x1b[0mhello world",
+		"\x1b[1mhello world",
+		"椙\x1b[1m椙",
+		"椙\x1b[1椙m椙",
+		"\x1b[1mhello \x1b[mw\x1b7o\x1b8r\x1b(Bl\x1b[2@d",
+		"\x1b[1mhello \x1b[Kworld",
+		"hello \x1b[34;45;1mworld",
+		"hello \x1b[34;45;1mwor\x1b[34;45;1mld",
+		"hello \x1b[34;45;1mwor\x1b[0mld",
+		"hello \x1b[34;48;5;233;1mwo\x1b[38;5;161mr\x1b[0ml\x1b[38;5;161md",
+		"hello \x1b[38;5;38;48;5;48;1mwor\x1b[38;5;48;48;5;38ml\x1b[0md",
+		"hello \x1b[32;1mworld",
+		"hello world",
+		"hello \x1b[0;38;5;200;48;5;100mworld",
+		"\x1b椙",
+		"椙\x08",
+		"\n\x08",
+		"X\x08",
+		"",
+		"\x1b]4;3;rgb:aa/bb/cc\x07 ",
+		"\x1b]4;3;rgb:aa/bb/cc\x1b\\ ",
+		ansiBenchmarkString,
+	}
+
+	for _, s := range testStrs {
+		testParserReference(t, s)
+	}
+}
+
+func TestNextAnsiEscapeSequence_Fuzz_Modified(t *testing.T) {
+	t.Parallel()
+	if testing.Short() {
+		t.Skip("short test")
+	}
+
+	testStrs := []string{
+		"\x1b[0mhello world",
+		"\x1b[1mhello world",
+		"椙\x1b[1m椙",
+		"椙\x1b[1椙m椙",
+		"\x1b[1mhello \x1b[mw\x1b7o\x1b8r\x1b(Bl\x1b[2@d",
+		"\x1b[1mhello \x1b[Kworld",
+		"hello \x1b[34;45;1mworld",
+		"hello \x1b[34;45;1mwor\x1b[34;45;1mld",
+		"hello \x1b[34;45;1mwor\x1b[0mld",
+		"hello \x1b[34;48;5;233;1mwo\x1b[38;5;161mr\x1b[0ml\x1b[38;5;161md",
+		"hello \x1b[38;5;38;48;5;48;1mwor\x1b[38;5;48;48;5;38ml\x1b[0md",
+		"hello \x1b[32;1mworld",
+		"hello world",
+		"hello \x1b[0;38;5;200;48;5;100mworld",
+		ansiBenchmarkString,
+	}
+
+	replacementBytes := [...]rune{'\x0e', '\x0f', '\x1b', '\x08'}
+
+	modifyString := func(s string, rr *rand.Rand) string {
+		n := rr.Intn(len(s))
+		b := []rune(s)
+		for ; n >= 0 && len(b) != 0; n-- {
+			i := rr.Intn(len(b))
+			switch x := rr.Intn(4); x {
+			case 0:
+				b = append(b[:i], b[i+1:]...)
+			case 1:
+				j := rr.Intn(len(replacementBytes) - 1)
+				b[i] = replacementBytes[j]
+			case 2:
+				x := rune(rr.Intn(utf8.MaxRune))
+				for !utf8.ValidRune(x) {
+					x = rune(rr.Intn(utf8.MaxRune))
+				}
+				b[i] = x
+			case 3:
+				b[i] = rune(rr.Intn(utf8.MaxRune)) // potentially invalid
+			default:
+				t.Fatalf("unsupported value: %d", x)
+			}
+		}
+		return string(b)
+	}
+
+	rr := rand.New(rand.NewSource(1))
+	for _, s := range testStrs {
+		for i := 1_000; i >= 0; i-- {
+			testParserReference(t, modifyString(s, rr))
+		}
+	}
+}
+
+func TestNextAnsiEscapeSequence_Fuzz_Random(t *testing.T) {
+	t.Parallel()
+
+	if testing.Short() {
+		t.Skip("short test")
+	}
+
+	randomString := func(rr *rand.Rand) string {
+		numChars := rand.Intn(50)
+		codePoints := make([]rune, numChars)
+		for i := 0; i < len(codePoints); i++ {
+			var r rune
+			for n := 0; n < 1000; n++ {
+				r = rune(rr.Intn(utf8.MaxRune))
+				// Allow 10% of runes to be invalid
+				if utf8.ValidRune(r) || rr.Float64() < 0.10 {
+					break
+				}
+			}
+			codePoints[i] = r
+		}
+		return string(codePoints)
+	}
+
+	rr := rand.New(rand.NewSource(1))
+	for i := 0; i < 100_000; i++ {
+		testParserReference(t, randomString(rr))
+	}
+}
+
 func TestExtractColor(t *testing.T) {
 	assert := func(offset ansiOffset, b int32, e int32, fg tui.Color, bg tui.Color, bold bool) {
 		var attr tui.Attr
@@ -26,9 +206,9 @@ func TestExtractColor(t *testing.T) {
 		output, ansiOffsets, newState := extractColor(src, state, nil)
 		state = newState
 		if output != "hello world" {
-			t.Errorf("Invalid output: %s %s", output, []rune(output))
+			t.Errorf("Invalid output: %s %v", output, []rune(output))
 		}
-		fmt.Println(src, ansiOffsets, clean)
+		t.Log(src, ansiOffsets, clean)
 		assertion(ansiOffsets, state)
 	}
 
@@ -155,4 +335,119 @@ func TestExtractColor(t *testing.T) {
 		assert((*offsets)[0], 0, 6, 2, -1, true)
 		assert((*offsets)[1], 6, 11, 200, 100, false)
 	})
+
+	state = nil
+	var color24 tui.Color = (1 << 24) + (180 << 16) + (190 << 8) + 254
+	src = "\x1b[1mhello \x1b[22;1;38:2:180:190:254mworld"
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 2 {
+			t.Fail()
+		}
+		if state.fg != color24 || state.attr != 1 {
+			t.Fail()
+		}
+		assert((*offsets)[0], 0, 6, -1, -1, true)
+		assert((*offsets)[1], 6, 11, color24, -1, true)
+	})
+
+	src = "\x1b]133;A\x1b\\hello \x1b]133;C\x1b\\world"
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
+			t.Fail()
+		}
+		assert((*offsets)[0], 0, 11, color24, -1, true)
+	})
+}
+
+func TestAnsiCodeStringConversion(t *testing.T) {
+	assert := func(code string, prevState *ansiState, expected string) {
+		state := interpretCode(code, prevState)
+		if expected != state.ToString() {
+			t.Errorf("expected: %s, actual: %s",
+				strings.ReplaceAll(expected, "\x1b[", "\\x1b["),
+				strings.ReplaceAll(state.ToString(), "\x1b[", "\\x1b["))
+		}
+	}
+	assert("\x1b[m", nil, "")
+	assert("\x1b[m", &ansiState{attr: tui.Blink, lbg: -1}, "")
+	assert("\x1b[0m", &ansiState{fg: 4, bg: 4, lbg: -1}, "")
+	assert("\x1b[;m", &ansiState{fg: 4, bg: 4, lbg: -1}, "")
+	assert("\x1b[;;m", &ansiState{fg: 4, bg: 4, lbg: -1}, "")
+
+	assert("\x1b[31m", nil, "\x1b[31;49m")
+	assert("\x1b[41m", nil, "\x1b[39;41m")
+
+	assert("\x1b[92m", nil, "\x1b[92;49m")
+	assert("\x1b[102m", nil, "\x1b[39;102m")
+
+	assert("\x1b[31m", &ansiState{fg: 4, bg: 4, lbg: -1}, "\x1b[31;44m")
+	assert("\x1b[1;2;31m", &ansiState{fg: 2, bg: -1, attr: tui.Reverse, lbg: -1}, "\x1b[1;2;7;31;49m")
+	assert("\x1b[38;5;100;48;5;200m", nil, "\x1b[38;5;100;48;5;200m")
+	assert("\x1b[38:5:100:48:5:200m", nil, "\x1b[38;5;100;48;5;200m")
+	assert("\x1b[48;5;100;38;5;200m", nil, "\x1b[38;5;200;48;5;100m")
+	assert("\x1b[48;5;100;38;2;10;20;30;1m", nil, "\x1b[1;38;2;10;20;30;48;5;100m")
+	assert("\x1b[48;5;100;38;2;10;20;30;7m",
+		&ansiState{attr: tui.Dim | tui.Italic, fg: 1, bg: 1},
+		"\x1b[2;3;7;38;2;10;20;30;48;5;100m")
+}
+
+func TestParseAnsiCode(t *testing.T) {
+	tests := []struct {
+		In, Exp string
+		N       int
+	}{
+		{"123", "", 123},
+		{"1a", "", -1},
+		{"1a;12", "12", -1},
+		{"12;a", "a", 12},
+		{"-2", "", -1},
+	}
+	for _, x := range tests {
+		n, s := parseAnsiCode(x.In)
+		if n != x.N || s != x.Exp {
+			t.Fatalf("%q: got: (%d %q) want: (%d %q)", x.In, n, s, x.N, x.Exp)
+		}
+	}
+}
+
+// kernel/bpf/preload/iterators/README
+const ansiBenchmarkString = "\x1b[38;5;81m\x1b[01;31m\x1b[Kkernel/\x1b[0m\x1b[38:5:81mbpf/" +
+	"\x1b[0m\x1b[38:5:81mpreload/\x1b[0m\x1b[38;5;81miterators/" +
+	"\x1b[0m\x1b[38:5:149mMakefile\x1b[m\x1b[K\x1b[0m"
+
+func BenchmarkNextAnsiEscapeSequence(b *testing.B) {
+	b.SetBytes(int64(len(ansiBenchmarkString)))
+	for i := 0; i < b.N; i++ {
+		s := ansiBenchmarkString
+		for {
+			_, o := nextAnsiEscapeSequence(s)
+			if o == -1 {
+				break
+			}
+			s = s[o:]
+		}
+	}
+}
+
+// Baseline test to compare the speed of nextAnsiEscapeSequence() to the
+// previously used regex based implementation.
+func BenchmarkNextAnsiEscapeSequence_Regex(b *testing.B) {
+	b.SetBytes(int64(len(ansiBenchmarkString)))
+	for i := 0; i < b.N; i++ {
+		s := ansiBenchmarkString
+		for {
+			a := ansiRegexReference.FindStringIndex(s)
+			if len(a) == 0 {
+				break
+			}
+			s = s[a[1]:]
+		}
+	}
+}
+
+func BenchmarkExtractColor(b *testing.B) {
+	b.SetBytes(int64(len(ansiBenchmarkString)))
+	for i := 0; i < b.N; i++ {
+		extractColor(ansiBenchmarkString, nil, nil)
+	}
 }

src/cache.go

@@ -3,7 +3,7 @@ package fzf
 import "sync"
 
 // queryCache associates strings to lists of items
-type queryCache map[string][]*Result
+type queryCache map[string][]Result
 
 // ChunkCache associates Chunk and query string to lists of items
 type ChunkCache struct {
@@ -12,12 +12,26 @@ type ChunkCache struct {
 }
 
 // NewChunkCache returns a new ChunkCache
-func NewChunkCache() ChunkCache {
-	return ChunkCache{sync.Mutex{}, make(map[*Chunk]*queryCache)}
+func NewChunkCache() *ChunkCache {
+	return &ChunkCache{sync.Mutex{}, make(map[*Chunk]*queryCache)}
+}
+
+func (cc *ChunkCache) Clear() {
+	cc.mutex.Lock()
+	cc.cache = make(map[*Chunk]*queryCache)
+	cc.mutex.Unlock()
+}
+
+func (cc *ChunkCache) retire(chunk ...*Chunk) {
+	cc.mutex.Lock()
+	for _, c := range chunk {
+		delete(cc.cache, c)
+	}
+	cc.mutex.Unlock()
 }
 
 // Add adds the list to the cache
-func (cc *ChunkCache) Add(chunk *Chunk, key string, list []*Result) {
+func (cc *ChunkCache) Add(chunk *Chunk, key string, list []Result) {
 	if len(key) == 0 || !chunk.IsFull() || len(list) > queryCacheMax {
 		return
 	}
@@ -33,10 +47,10 @@ func (cc *ChunkCache) Add(chunk *Chunk, key string, list []*Result) {
 	(*qc)[key] = list
 }
 
-// Find is called to lookup ChunkCache
-func (cc *ChunkCache) Find(chunk *Chunk, key string) ([]*Result, bool) {
+// Lookup is called to lookup ChunkCache
+func (cc *ChunkCache) Lookup(chunk *Chunk, key string) []Result {
 	if len(key) == 0 || !chunk.IsFull() {
-		return nil, false
+		return nil
 	}
 
 	cc.mutex.Lock()
@@ -46,8 +60,36 @@ func (cc *ChunkCache) Find(chunk *Chunk, key string) ([]*Result, bool) {
 	if ok {
 		list, ok := (*qc)[key]
 		if ok {
-			return list, true
+			return list
 		}
 	}
-	return nil, false
+	return nil
+}
+
+func (cc *ChunkCache) Search(chunk *Chunk, key string) []Result {
+	if len(key) == 0 || !chunk.IsFull() {
+		return nil
+	}
+
+	cc.mutex.Lock()
+	defer cc.mutex.Unlock()
+
+	qc, ok := cc.cache[chunk]
+	if !ok {
+		return nil
+	}
+
+	for idx := 1; idx < len(key); idx++ {
+		// [---------| ] | [ |---------]
+		// [--------|  ] | [  |--------]
+		// [-------|   ] | [   |-------]
+		prefix := key[:len(key)-idx]
+		suffix := key[idx:]
+		for _, substr := range [2]string{prefix, suffix} {
+			if cached, found := (*qc)[substr]; found {
+				return cached
+			}
+		}
+	}
+	return nil
 }

src/cache_test.go

@@ -4,37 +4,36 @@ import "testing"
 
 func TestChunkCache(t *testing.T) {
 	cache := NewChunkCache()
-	chunk2 := make(Chunk, chunkSize)
 	chunk1p := &Chunk{}
-	chunk2p := &chunk2
-	items1 := []*Result{&Result{}}
-	items2 := []*Result{&Result{}, &Result{}}
+	chunk2p := &Chunk{count: chunkSize}
+	items1 := []Result{{}}
+	items2 := []Result{{}, {}}
 	cache.Add(chunk1p, "foo", items1)
 	cache.Add(chunk2p, "foo", items1)
 	cache.Add(chunk2p, "bar", items2)
 
 	{ // chunk1 is not full
-		cached, found := cache.Find(chunk1p, "foo")
-		if found {
-			t.Error("Cached disabled for non-empty chunks", found, cached)
+		cached := cache.Lookup(chunk1p, "foo")
+		if cached != nil {
+			t.Error("Cached disabled for non-empty chunks", cached)
 		}
 	}
 	{
-		cached, found := cache.Find(chunk2p, "foo")
-		if !found || len(cached) != 1 {
-			t.Error("Expected 1 item cached", found, cached)
+		cached := cache.Lookup(chunk2p, "foo")
+		if cached == nil || len(cached) != 1 {
+			t.Error("Expected 1 item cached", cached)
 		}
 	}
 	{
-		cached, found := cache.Find(chunk2p, "bar")
-		if !found || len(cached) != 2 {
-			t.Error("Expected 2 items cached", found, cached)
+		cached := cache.Lookup(chunk2p, "bar")
+		if cached == nil || len(cached) != 2 {
+			t.Error("Expected 2 items cached", cached)
 		}
 	}
 	{
-		cached, found := cache.Find(chunk1p, "foobar")
-		if found {
-			t.Error("Expected 0 item cached", found, cached)
+		cached := cache.Lookup(chunk1p, "foobar")
+		if cached != nil {
+			t.Error("Expected 0 item cached", cached)
 		}
 	}
 }

src/chunklist.go

@@ -2,34 +2,35 @@ package fzf
 
 import "sync"
 
-// Chunk is a list of Item pointers whose size has the upper limit of chunkSize
-type Chunk []*Item // >>> []Item
+// Chunk is a list of Items whose size has the upper limit of chunkSize
+type Chunk struct {
+	items [chunkSize]Item
+	count int
+}
 
-// ItemBuilder is a closure type that builds Item object from a pointer to a
-// string and an integer
-type ItemBuilder func([]byte, int) *Item
+// ItemBuilder is a closure type that builds Item object from byte array
+type ItemBuilder func(*Item, []byte) bool
 
 // ChunkList is a list of Chunks
 type ChunkList struct {
 	chunks []*Chunk
-	count  int
 	mutex  sync.Mutex
 	trans  ItemBuilder
+	cache  *ChunkCache
 }
 
 // NewChunkList returns a new ChunkList
-func NewChunkList(trans ItemBuilder) *ChunkList {
+func NewChunkList(cache *ChunkCache, trans ItemBuilder) *ChunkList {
 	return &ChunkList{
 		chunks: []*Chunk{},
-		count:  0,
 		mutex:  sync.Mutex{},
-		trans:  trans}
+		trans:  trans,
+		cache:  cache}
 }
 
-func (c *Chunk) push(trans ItemBuilder, data []byte, index int) bool {
-	item := trans(data, index)
-	if item != nil {
-		*c = append(*c, item)
+func (c *Chunk) push(trans ItemBuilder, data []byte) bool {
+	if trans(&c.items[c.count], data) {
+		c.count++
 		return true
 	}
 	return false
@@ -37,7 +38,7 @@ func (c *Chunk) push(trans ItemBuilder, data []byte, index int) bool {
 
 // IsFull returns true if the Chunk is full
 func (c *Chunk) IsFull() bool {
-	return len(*c) == chunkSize
+	return c.count == chunkSize
 }
 
 func (cl *ChunkList) lastChunk() *Chunk {
@@ -49,45 +50,85 @@ func CountItems(cs []*Chunk) int {
 	if len(cs) == 0 {
 		return 0
 	}
-	return chunkSize*(len(cs)-1) + len(*(cs[len(cs)-1]))
+	if len(cs) == 1 {
+		return cs[0].count
+	}
+
+	// First chunk might not be full due to --tail=N
+	return cs[0].count + chunkSize*(len(cs)-2) + cs[len(cs)-1].count
 }
 
 // Push adds the item to the list
 func (cl *ChunkList) Push(data []byte) bool {
 	cl.mutex.Lock()
-	defer cl.mutex.Unlock()
 
 	if len(cl.chunks) == 0 || cl.lastChunk().IsFull() {
-		newChunk := Chunk(make([]*Item, 0, chunkSize))
-		cl.chunks = append(cl.chunks, &newChunk)
+		cl.chunks = append(cl.chunks, &Chunk{})
 	}
 
-	if cl.lastChunk().push(cl.trans, data, cl.count) {
-		cl.count++
-		return true
-	}
-	return false
+	ret := cl.lastChunk().push(cl.trans, data)
+	cl.mutex.Unlock()
+	return ret
+}
+
+// Clear clears the data
+func (cl *ChunkList) Clear() {
+	cl.mutex.Lock()
+	cl.chunks = nil
+	cl.mutex.Unlock()
 }
 
 // Snapshot returns immutable snapshot of the ChunkList
-func (cl *ChunkList) Snapshot() ([]*Chunk, int) {
+func (cl *ChunkList) Snapshot(tail int) ([]*Chunk, int, bool) {
 	cl.mutex.Lock()
-	defer cl.mutex.Unlock()
+
+	changed := false
+	if tail > 0 && CountItems(cl.chunks) > tail {
+		changed = true
+		// Find the number of chunks to keep
+		numChunks := 0
+		for left, i := tail, len(cl.chunks)-1; left > 0 && i >= 0; i-- {
+			numChunks++
+			left -= cl.chunks[i].count
+		}
+
+		// Copy the chunks to keep
+		ret := make([]*Chunk, numChunks)
+		minIndex := len(cl.chunks) - numChunks
+		cl.cache.retire(cl.chunks[:minIndex]...)
+		copy(ret, cl.chunks[minIndex:])
+
+		for left, i := tail, len(ret)-1; i >= 0; i-- {
+			chunk := ret[i]
+			if chunk.count > left {
+				newChunk := *chunk
+				newChunk.count = left
+				oldCount := chunk.count
+				for i := 0; i < left; i++ {
+					newChunk.items[i] = chunk.items[oldCount-left+i]
+				}
+				ret[i] = &newChunk
+				cl.cache.retire(chunk)
+				break
+			}
+			left -= chunk.count
+		}
+		cl.chunks = ret
+	}
 
 	ret := make([]*Chunk, len(cl.chunks))
 	copy(ret, cl.chunks)
 
-	// Duplicate the last chunk
+	// Duplicate the first and the last chunk
 	if cnt := len(ret); cnt > 0 {
-		ret[cnt-1] = ret[cnt-1].dupe()
+		if tail > 0 && cnt > 1 {
+			newChunk := *ret[0]
+			ret[0] = &newChunk
+		}
+		newChunk := *ret[cnt-1]
+		ret[cnt-1] = &newChunk
 	}
-	return ret, cl.count
-}
 
-func (c *Chunk) dupe() *Chunk {
-	newChunk := make(Chunk, len(*c))
-	for idx, ptr := range *c {
-		newChunk[idx] = ptr
-	}
-	return &newChunk
+	cl.mutex.Unlock()
+	return ret, CountItems(ret), changed
 }

src/chunklist_test.go

@@ -11,12 +11,13 @@ func TestChunkList(t *testing.T) {
 	// FIXME global
 	sortCriteria = []criterion{byScore, byLength}
 
-	cl := NewChunkList(func(s []byte, i int) *Item {
-		return &Item{text: util.ToChars(s), index: int32(i * 2)}
+	cl := NewChunkList(NewChunkCache(), func(item *Item, s []byte) bool {
+		item.text = util.ToChars(s)
+		return true
 	})
 
 	// Snapshot
-	snapshot, count := cl.Snapshot()
+	snapshot, count, _ := cl.Snapshot(0)
 	if len(snapshot) > 0 || count > 0 {
 		t.Error("Snapshot should be empty now")
 	}
@@ -31,18 +32,18 @@ func TestChunkList(t *testing.T) {
 	}
 
 	// But the new snapshot should contain the added items
-	snapshot, count = cl.Snapshot()
+	snapshot, count, _ = cl.Snapshot(0)
 	if len(snapshot) != 1 && count != 2 {
 		t.Error("Snapshot should not be empty now")
 	}
 
 	// Check the content of the ChunkList
 	chunk1 := snapshot[0]
-	if len(*chunk1) != 2 {
+	if chunk1.count != 2 {
 		t.Error("Snapshot should contain only two items")
 	}
-	if (*chunk1)[0].text.ToString() != "hello" || (*chunk1)[0].index != 0 ||
-		(*chunk1)[1].text.ToString() != "world" || (*chunk1)[1].index != 2 {
+	if chunk1.items[0].text.ToString() != "hello" ||
+		chunk1.items[1].text.ToString() != "world" {
 		t.Error("Invalid data")
 	}
 	if chunk1.IsFull() {
@@ -60,20 +61,56 @@ func TestChunkList(t *testing.T) {
 	}
 
 	// New snapshot
-	snapshot, count = cl.Snapshot()
+	snapshot, count, _ = cl.Snapshot(0)
 	if len(snapshot) != 3 || !snapshot[0].IsFull() ||
 		!snapshot[1].IsFull() || snapshot[2].IsFull() || count != chunkSize*2+2 {
 		t.Error("Expected two full chunks and one more chunk")
 	}
-	if len(*snapshot[2]) != 2 {
+	if snapshot[2].count != 2 {
 		t.Error("Unexpected number of items")
 	}
 
 	cl.Push([]byte("hello"))
 	cl.Push([]byte("world"))
 
-	lastChunkCount := len(*snapshot[len(snapshot)-1])
+	lastChunkCount := snapshot[len(snapshot)-1].count
 	if lastChunkCount != 2 {
 		t.Error("Unexpected number of items:", lastChunkCount)
 	}
 }
+
+func TestChunkListTail(t *testing.T) {
+	cl := NewChunkList(NewChunkCache(), func(item *Item, s []byte) bool {
+		item.text = util.ToChars(s)
+		return true
+	})
+	total := chunkSize*2 + chunkSize/2
+	for i := 0; i < total; i++ {
+		cl.Push([]byte(fmt.Sprintf("item %d", i)))
+	}
+
+	snapshot, count, changed := cl.Snapshot(0)
+	assertCount := func(expected int, shouldChange bool) {
+		if count != expected || CountItems(snapshot) != expected {
+			t.Errorf("Unexpected count: %d (expected: %d)", count, expected)
+		}
+		if changed != shouldChange {
+			t.Error("Unexpected change status")
+		}
+	}
+	assertCount(total, false)
+
+	tail := chunkSize + chunkSize/2
+	snapshot, count, changed = cl.Snapshot(tail)
+	assertCount(tail, true)
+
+	snapshot, count, changed = cl.Snapshot(tail)
+	assertCount(tail, false)
+
+	snapshot, count, changed = cl.Snapshot(0)
+	assertCount(tail, false)
+
+	tail = chunkSize / 2
+	snapshot, count, changed = cl.Snapshot(tail)
+	assertCount(tail, true)
+}

src/constants.go

@@ -1,27 +1,33 @@
 package fzf
 
 import (
+	"math"
 	"time"
 
 	"github.com/junegunn/fzf/src/util"
 )
 
 const (
-	// Current version
-	version = "0.16.0"
-
 	// Core
 	coordinatorDelayMax  time.Duration = 100 * time.Millisecond
 	coordinatorDelayStep time.Duration = 10 * time.Millisecond
 
 	// Reader
-	readerBufferSize = 64 * 1024
+	readerBufferSize       = 64 * 1024
+	readerSlabSize         = 128 * 1024
+	readerPollIntervalMin  = 10 * time.Millisecond
+	readerPollIntervalStep = 5 * time.Millisecond
+	readerPollIntervalMax  = 50 * time.Millisecond
 
 	// Terminal
-	initialDelay     = 20 * time.Millisecond
-	initialDelayTac  = 100 * time.Millisecond
-	spinnerDuration  = 200 * time.Millisecond
-	maxPatternLength = 100
+	initialDelay      = 20 * time.Millisecond
+	initialDelayTac   = 100 * time.Millisecond
+	spinnerDuration   = 100 * time.Millisecond
+	previewCancelWait = 500 * time.Millisecond
+	previewChunkDelay = 100 * time.Millisecond
+	previewDelayed    = 500 * time.Millisecond
+	maxPatternLength  = 1000
+	maxMulti          = math.MaxInt32
 
 	// Matcher
 	numPartitionsMultiplier = 8
@@ -56,12 +62,14 @@ const (
 	EvtSearchProgress
 	EvtSearchFin
 	EvtHeader
-	EvtClose
+	EvtReady
+	EvtQuit
 )
 
 const (
-	exitOk        = 0
-	exitNoMatch   = 1
-	exitError     = 2
-	exitInterrupt = 130
+	ExitOk        = 0
+	ExitNoMatch   = 1
+	ExitError     = 2
+	ExitBecome    = 126
+	ExitInterrupt = 130
 )

src/constants_unix.go

@@ -1,8 +0,0 @@
-// +build !windows
-
-package fzf
-
-const (
-	// Reader
-	defaultCommand = `find . -path '*/\.*' -prune -o -type f -print -o -type l -print 2> /dev/null | sed s/^..//`
-)

src/constants_windows.go

@@ -1,8 +0,0 @@
-// +build windows
-
-package fzf
-
-const (
-	// Reader
-	defaultCommand = `dir /s/b`
-)

src/core.go

@@ -1,33 +1,9 @@
-/*
-Package fzf implements fzf, a command-line fuzzy finder.
-
-The MIT License (MIT)
-
-Copyright (c) 2016 Junegunn Choi
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-*/
+// Package fzf implements fzf, a command-line fuzzy finder.
 package fzf
 
 import (
-	"fmt"
 	"os"
+	"sync"
 	"time"
 
 	"github.com/junegunn/fzf/src/util"
@@ -42,16 +18,52 @@ Matcher  -> EvtSearchFin      -> Terminal (update list)
 Matcher  -> EvtHeader         -> Terminal (update header)
 */
 
+type revision struct {
+	major int
+	minor int
+}
+
+func (r *revision) bumpMajor() {
+	r.major++
+	r.minor = 0
+}
+
+func (r *revision) bumpMinor() {
+	r.minor++
+}
+
+func (r revision) compatible(other revision) bool {
+	return r.major == other.major
+}
+
 // Run starts fzf
-func Run(opts *Options) {
+func Run(opts *Options) (int, error) {
+	if opts.Filter == nil {
+		if opts.Tmux != nil && len(os.Getenv("TMUX")) > 0 && opts.Tmux.index >= opts.Height.index {
+			return runTmux(os.Args, opts)
+		}
+
+		if needWinpty(opts) {
+			return runWinpty(os.Args, opts)
+		}
+	}
+
+	if err := postProcessOptions(opts); err != nil {
+		return ExitError, err
+	}
+
+	defer util.RunAtExitFuncs()
+
+	// Output channel given
+	if opts.Output != nil {
+		opts.Printer = func(str string) {
+			opts.Output <- str
+		}
+	}
+
 	sort := opts.Sort > 0
 	sortCriteria = opts.Criteria
 
-	if opts.Version {
-		fmt.Println(version)
-		os.Exit(exitOk)
-	}
-
 	// Event channel
 	eventBox := util.NewEventBox()
 
@@ -59,94 +71,155 @@ func Run(opts *Options) {
 	ansiProcessor := func(data []byte) (util.Chars, *[]ansiOffset) {
 		return util.ToChars(data), nil
 	}
-	ansiProcessorRunes := func(data []rune) (util.Chars, *[]ansiOffset) {
-		return util.RunesToChars(data), nil
-	}
+
+	var lineAnsiState, prevLineAnsiState *ansiState
 	if opts.Ansi {
-		if opts.Theme != nil {
-			var state *ansiState
+		if opts.Theme.Colored {
 			ansiProcessor = func(data []byte) (util.Chars, *[]ansiOffset) {
-				trimmed, offsets, newState := extractColor(string(data), state, nil)
-				state = newState
-				return util.RunesToChars([]rune(trimmed)), offsets
+				prevLineAnsiState = lineAnsiState
+				trimmed, offsets, newState := extractColor(byteString(data), lineAnsiState, nil)
+				lineAnsiState = newState
+				return util.ToChars(stringBytes(trimmed)), offsets
 			}
 		} else {
 			// When color is disabled but ansi option is given,
 			// we simply strip out ANSI codes from the input
 			ansiProcessor = func(data []byte) (util.Chars, *[]ansiOffset) {
-				trimmed, _, _ := extractColor(string(data), nil, nil)
-				return util.RunesToChars([]rune(trimmed)), nil
+				trimmed, _, _ := extractColor(byteString(data), nil, nil)
+				return util.ToChars(stringBytes(trimmed)), nil
 			}
 		}
-		ansiProcessorRunes = func(data []rune) (util.Chars, *[]ansiOffset) {
-			return ansiProcessor([]byte(string(data)))
-		}
 	}
 
 	// Chunk list
+	cache := NewChunkCache()
 	var chunkList *ChunkList
+	var itemIndex int32
 	header := make([]string, 0, opts.HeaderLines)
-	if len(opts.WithNth) == 0 {
-		chunkList = NewChunkList(func(data []byte, index int) *Item {
+	if opts.WithNth == nil {
+		chunkList = NewChunkList(cache, func(item *Item, data []byte) bool {
 			if len(header) < opts.HeaderLines {
-				header = append(header, string(data))
+				header = append(header, byteString(data))
 				eventBox.Set(EvtHeader, header)
-				return nil
+				return false
 			}
-			chars, colors := ansiProcessor(data)
-			return &Item{
-				index:  int32(index),
-				text:   chars,
-				colors: colors}
+			item.text, item.colors = ansiProcessor(data)
+			item.text.Index = itemIndex
+			itemIndex++
+			return true
 		})
 	} else {
-		chunkList = NewChunkList(func(data []byte, index int) *Item {
-			tokens := Tokenize(util.ToChars(data), opts.Delimiter)
-			trans := Transform(tokens, opts.WithNth)
-			if len(header) < opts.HeaderLines {
-				header = append(header, string(joinTokens(trans)))
-				eventBox.Set(EvtHeader, header)
-				return nil
+		nthTransformer := opts.WithNth(opts.Delimiter)
+		chunkList = NewChunkList(cache, func(item *Item, data []byte) bool {
+			tokens := Tokenize(byteString(data), opts.Delimiter)
+			if opts.Ansi && opts.Theme.Colored && len(tokens) > 1 {
+				var ansiState *ansiState
+				if prevLineAnsiState != nil {
+					ansiStateDup := *prevLineAnsiState
+					ansiState = &ansiStateDup
+				}
+				for _, token := range tokens {
+					prevAnsiState := ansiState
+					_, _, ansiState = extractColor(token.text.ToString(), ansiState, nil)
+					if prevAnsiState != nil {
+						token.text.Prepend("\x1b[m" + prevAnsiState.ToString())
+					} else {
+						token.text.Prepend("\x1b[m")
+					}
+				}
 			}
-			textRunes := joinTokens(trans)
-			item := Item{
-				index:    int32(index),
-				origText: &data,
-				colors:   nil}
-
-			trimmed, colors := ansiProcessorRunes(textRunes)
-			item.text = trimmed
-			item.colors = colors
-			return &item
+			transformed := nthTransformer(tokens, itemIndex)
+			if len(header) < opts.HeaderLines {
+				header = append(header, transformed)
+				eventBox.Set(EvtHeader, header)
+				return false
+			}
+			item.text, item.colors = ansiProcessor(stringBytes(transformed))
+			item.text.TrimTrailingWhitespaces()
+			item.text.Index = itemIndex
+			item.origText = &data
+			itemIndex++
+			return true
 		})
 	}
 
+	// Process executor
+	executor := util.NewExecutor(opts.WithShell)
+
+	// Terminal I/O
+	var terminal *Terminal
+	var err error
+	var initialEnv []string
+	initialReload := opts.extractReloadOnStart()
+	if opts.Filter == nil {
+		terminal, err = NewTerminal(opts, eventBox, executor)
+		if err != nil {
+			return ExitError, err
+		}
+		if len(initialReload) > 0 {
+			var temps []string
+			initialReload, temps = terminal.replacePlaceholderInInitialCommand(initialReload)
+			initialEnv = terminal.environ()
+			defer removeFiles(temps)
+		}
+	}
+
 	// Reader
 	streamingFilter := opts.Filter != nil && !sort && !opts.Tac && !opts.Sync
+	var reader *Reader
 	if !streamingFilter {
-		reader := Reader{func(data []byte) bool {
+		reader = NewReader(func(data []byte) bool {
 			return chunkList.Push(data)
-		}, eventBox, opts.ReadZero}
-		go reader.ReadSource()
+		}, eventBox, executor, opts.ReadZero, opts.Filter == nil)
+
+		readyChan := make(chan bool)
+		go reader.ReadSource(opts.Input, opts.WalkerRoot, opts.WalkerOpts, opts.WalkerSkip, initialReload, initialEnv, readyChan)
+		<-readyChan
 	}
 
 	// Matcher
 	forward := true
-	for _, cri := range opts.Criteria[1:] {
-		if cri == byEnd {
+	withPos := false
+	for idx := len(opts.Criteria) - 1; idx > 0; idx-- {
+		switch opts.Criteria[idx] {
+		case byChunk:
+			withPos = true
+		case byEnd:
+			forward = false
+		case byBegin:
+			forward = true
+		case byPathname:
+			withPos = true
 			forward = false
-			break
 		}
-		if cri == byBegin {
-			break
+	}
+
+	nth := opts.Nth
+	inputRevision := revision{}
+	snapshotRevision := revision{}
+	patternCache := make(map[string]*Pattern)
+	denyMutex := sync.Mutex{}
+	denylist := make(map[int32]struct{})
+	clearDenylist := func() {
+		denyMutex.Lock()
+		if len(denylist) > 0 {
+			patternCache = make(map[string]*Pattern)
 		}
+		denylist = make(map[int32]struct{})
+		denyMutex.Unlock()
 	}
 	patternBuilder := func(runes []rune) *Pattern {
-		return BuildPattern(
-			opts.Fuzzy, opts.FuzzyAlgo, opts.Extended, opts.Case, opts.Normalize, forward,
-			opts.Filter == nil, opts.Nth, opts.Delimiter, runes)
+		denyMutex.Lock()
+		denylistCopy := make(map[int32]struct{})
+		for k, v := range denylist {
+			denylistCopy[k] = v
+		}
+		denyMutex.Unlock()
+		return BuildPattern(cache, patternCache,
+			opts.Fuzzy, opts.FuzzyAlgo, opts.Extended, opts.Case, opts.Normalize, forward, withPos,
+			opts.Filter == nil, nth, opts.Delimiter, inputRevision, runes, denylistCopy)
 	}
-	matcher := NewMatcher(patternBuilder, sort, opts.Tac, eventBox)
+	matcher := NewMatcher(cache, patternBuilder, sort, opts.Tac, eventBox, inputRevision)
 
 	// Filtering mode
 	if opts.Filter != nil {
@@ -155,27 +228,32 @@ func Run(opts *Options) {
 		}
 
 		pattern := patternBuilder([]rune(*opts.Filter))
+		matcher.sort = pattern.sortable
 
 		found := false
 		if streamingFilter {
 			slab := util.MakeSlab(slab16Size, slab32Size)
-			reader := Reader{
+			mutex := sync.Mutex{}
+			reader := NewReader(
 				func(runes []byte) bool {
-					item := chunkList.trans(runes, 0)
-					if item != nil {
-						if result, _, _ := pattern.MatchItem(item, false, slab); result != nil {
+					item := Item{}
+					if chunkList.trans(&item, runes) {
+						mutex.Lock()
+						if result, _, _ := pattern.MatchItem(&item, false, slab); result != nil {
 							opts.Printer(item.text.ToString())
 							found = true
 						}
+						mutex.Unlock()
 					}
 					return false
-				}, eventBox, opts.ReadZero}
-			reader.ReadSource()
+				}, eventBox, executor, opts.ReadZero, false)
+			reader.ReadSource(opts.Input, opts.WalkerRoot, opts.WalkerOpts, opts.WalkerSkip, initialReload, initialEnv, nil)
 		} else {
 			eventBox.Unwatch(EvtReadNew)
 			eventBox.WaitFor(EvtReadFin)
 
-			snapshot, _ := chunkList.Snapshot()
+			// NOTE: Streaming filter is inherently not compatible with --tail
+			snapshot, _, _ := chunkList.Snapshot(opts.Tail)
 			merger, _ := matcher.scan(MatchRequest{
 				chunks:  snapshot,
 				pattern: pattern})
@@ -185,9 +263,9 @@ func Run(opts *Options) {
 			}
 		}
 		if found {
-			os.Exit(exitOk)
+			return ExitOk, nil
 		}
-		os.Exit(exitNoMatch)
+		return ExitNoMatch, nil
 	}
 
 	// Synchronous search
@@ -198,40 +276,181 @@ func Run(opts *Options) {
 
 	// Go interactive
 	go matcher.Loop()
+	defer matcher.Stop()
 
-	// Terminal I/O
-	terminal := NewTerminal(opts, eventBox)
-	deferred := opts.Select1 || opts.Exit0
+	// Handling adaptive height
+	maxFit := 0 // Maximum number of items that can fit on screen
+	padHeight := 0
+	heightUnknown := opts.Height.auto
+	if heightUnknown {
+		maxFit, padHeight = terminal.MaxFitAndPad()
+	}
+	deferred := opts.Select1 || opts.Exit0 || opts.Sync
 	go terminal.Loop()
-	if !deferred {
-		terminal.startChan <- true
+	if !deferred && !heightUnknown {
+		// Start right away
+		terminal.startChan <- fitpad{-1, -1}
 	}
 
 	// Event coordination
 	reading := true
 	ticks := 0
+	startTick := 0
+	var nextCommand *commandSpec
+	var nextEnviron []string
 	eventBox.Watch(EvtReadNew)
+	total := 0
+	query := []rune{}
+	determine := func(final bool) {
+		if heightUnknown {
+			if total >= maxFit || final {
+				deferred = false
+				heightUnknown = false
+				terminal.startChan <- fitpad{util.Min(total, maxFit), padHeight}
+			}
+		} else if deferred {
+			deferred = false
+			terminal.startChan <- fitpad{-1, -1}
+		}
+	}
+
+	useSnapshot := false
+	var snapshot []*Chunk
+	var count int
+	restart := func(command commandSpec, environ []string) {
+		if !useSnapshot {
+			clearDenylist()
+		}
+		reading = true
+		startTick = ticks
+		chunkList.Clear()
+		itemIndex = 0
+		inputRevision.bumpMajor()
+		header = make([]string, 0, opts.HeaderLines)
+		readyChan := make(chan bool)
+		go reader.restart(command, environ, readyChan)
+		<-readyChan
+	}
+
+	exitCode := ExitOk
+	stop := false
 	for {
 		delay := true
 		ticks++
+		input := func() []rune {
+			paused, input := terminal.Input()
+			if !paused {
+				query = input
+			}
+			return query
+		}
 		eventBox.Wait(func(events *util.Events) {
-			defer events.Clear()
+			if _, fin := (*events)[EvtReadFin]; fin {
+				delete(*events, EvtReadNew)
+			}
 			for evt, value := range *events {
 				switch evt {
-
+				case EvtQuit:
+					if reading {
+						reader.terminate()
+					}
+					quitSignal := value.(quitSignal)
+					exitCode = quitSignal.code
+					err = quitSignal.err
+					stop = true
+					return
 				case EvtReadNew, EvtReadFin:
-					reading = reading && evt == EvtReadNew
-					snapshot, count := chunkList.Snapshot()
-					terminal.UpdateCount(count, !reading)
-					matcher.Reset(snapshot, terminal.Input(), false, !reading, sort)
+					if evt == EvtReadFin && nextCommand != nil {
+						restart(*nextCommand, nextEnviron)
+						nextCommand = nil
+						nextEnviron = nil
+						break
+					} else {
+						reading = reading && evt == EvtReadNew
+					}
+					if useSnapshot && evt == EvtReadFin { // reload-sync
+						clearDenylist()
+						useSnapshot = false
+					}
+					if !useSnapshot {
+						if !snapshotRevision.compatible(inputRevision) {
+							query = []rune{}
+						}
+						var changed bool
+						snapshot, count, changed = chunkList.Snapshot(opts.Tail)
+						if changed {
+							inputRevision.bumpMinor()
+						}
+						snapshotRevision = inputRevision
+					}
+					total = count
+					terminal.UpdateCount(total, !reading, value.(*string))
+					if heightUnknown && !deferred {
+						determine(!reading)
+					}
+					matcher.Reset(snapshot, input(), false, !reading, sort, snapshotRevision)
 
 				case EvtSearchNew:
+					var command *commandSpec
+					var environ []string
+					var changed bool
 					switch val := value.(type) {
-					case bool:
-						sort = val
+					case searchRequest:
+						sort = val.sort
+						command = val.command
+						environ = val.environ
+						changed = val.changed
+						bump := false
+						if len(val.denylist) > 0 && val.revision.compatible(inputRevision) {
+							denyMutex.Lock()
+							for _, itemIndex := range val.denylist {
+								denylist[itemIndex] = struct{}{}
+							}
+							denyMutex.Unlock()
+							bump = true
+						}
+						if val.nth != nil {
+							// Change nth and clear caches
+							nth = *val.nth
+							bump = true
+						}
+						if bump {
+							patternCache = make(map[string]*Pattern)
+							cache.Clear()
+							inputRevision.bumpMinor()
+						}
+						if command != nil {
+							useSnapshot = val.sync
+						}
 					}
-					snapshot, _ := chunkList.Snapshot()
-					matcher.Reset(snapshot, terminal.Input(), true, !reading, sort)
+					if command != nil {
+						if reading {
+							reader.terminate()
+							nextCommand = command
+							nextEnviron = environ
+						} else {
+							restart(*command, environ)
+						}
+					}
+					if !changed {
+						break
+					}
+					if !useSnapshot {
+						newSnapshot, newCount, changed := chunkList.Snapshot(opts.Tail)
+						if changed {
+							inputRevision.bumpMinor()
+						}
+						// We want to avoid showing empty list when reload is triggered
+						// and the query string is changed at the same time i.e. command != nil && changed
+						if command == nil || newCount > 0 {
+							if snapshotRevision != inputRevision {
+								query = []rune{}
+							}
+							snapshot = newSnapshot
+							snapshotRevision = inputRevision
+						}
+					}
+					matcher.Reset(snapshot, input(), true, !reading, sort, snapshotRevision)
 					delay = false
 
 				case EvtSearchProgress:
@@ -241,7 +460,9 @@ func Run(opts *Options) {
 					}
 
 				case EvtHeader:
-					terminal.UpdateHeader(value.([]string))
+					headerPadded := make([]string, opts.HeaderLines)
+					copy(headerPadded, value.([]string))
+					terminal.UpdateHeader(headerPadded)
 
 				case EvtSearchFin:
 					switch val := value.(type) {
@@ -249,8 +470,7 @@ func Run(opts *Options) {
 						if deferred {
 							count := val.Length()
 							if opts.Select1 && count > 1 || opts.Exit0 && !opts.Select1 && count > 0 {
-								deferred = false
-								terminal.startChan <- true
+								determine(val.final)
 							} else if val.final {
 								if opts.Exit0 && count == 0 || opts.Select1 && count == 1 {
 									if opts.PrintQuery {
@@ -259,28 +479,42 @@ func Run(opts *Options) {
 									if len(opts.Expect) > 0 {
 										opts.Printer("")
 									}
+									transformer := func(item *Item) string {
+										return item.AsString(opts.Ansi)
+									}
+									if opts.AcceptNth != nil {
+										fn := opts.AcceptNth(opts.Delimiter)
+										transformer = func(item *Item) string {
+											return item.acceptNth(opts.Ansi, opts.Delimiter, fn)
+										}
+									}
 									for i := 0; i < count; i++ {
-										opts.Printer(val.Get(i).item.AsString(opts.Ansi))
+										opts.Printer(transformer(val.Get(i).item))
 									}
-									if count > 0 {
-										os.Exit(exitOk)
+									if count == 0 {
+										exitCode = ExitNoMatch
 									}
-									os.Exit(exitNoMatch)
+									stop = true
+									return
 								}
-								deferred = false
-								terminal.startChan <- true
+								determine(val.final)
 							}
 						}
 						terminal.UpdateList(val)
 					}
 				}
 			}
+			events.Clear()
 		})
+		if stop {
+			break
+		}
 		if delay && reading {
 			dur := util.DurWithin(
-				time.Duration(ticks)*coordinatorDelayStep,
+				time.Duration(ticks-startTick)*coordinatorDelayStep,
 				0, coordinatorDelayMax)
 			time.Sleep(dur)
 		}
 	}
+	return exitCode, err
 }

src/functions.go

@@ -0,0 +1,35 @@
+package fzf
+
+import (
+	"os"
+	"strings"
+	"unsafe"
+)
+
+func WriteTemporaryFile(data []string, printSep string) string {
+	f, err := os.CreateTemp("", "fzf-temp-*")
+	if err != nil {
+		// Unable to create temporary file
+		// FIXME: Should we terminate the program?
+		return ""
+	}
+	defer f.Close()
+
+	f.WriteString(strings.Join(data, printSep))
+	f.WriteString(printSep)
+	return f.Name()
+}
+
+func removeFiles(files []string) {
+	for _, filename := range files {
+		os.Remove(filename)
+	}
+}
+
+func stringBytes(data string) []byte {
+	return unsafe.Slice(unsafe.StringData(data), len(data))
+}
+
+func byteString(data []byte) string {
+	return unsafe.String(unsafe.SliceData(data), len(data))
+}

src/fzf/main.go

@@ -1,7 +0,0 @@
-package main
-
-import "github.com/junegunn/fzf/src"
-
-func main() {
-	fzf.Run(fzf.ParseOptions())
-}

src/history.go

@@ -2,7 +2,6 @@ package fzf
 
 import (
 	"errors"
-	"io/ioutil"
 	"os"
 	"strings"
 )
@@ -26,12 +25,12 @@ func NewHistory(path string, maxSize int) (*History, error) {
 	}
 
 	// Read history file
-	data, err := ioutil.ReadFile(path)
+	data, err := os.ReadFile(path)
 	if err != nil {
 		// If it doesn't exist, check if we can create a file with the name
 		if os.IsNotExist(err) {
 			data = []byte{}
-			if err := ioutil.WriteFile(path, data, 0600); err != nil {
+			if err := os.WriteFile(path, data, 0600); err != nil {
 				return nil, fmtError(err)
 			}
 		} else {
@@ -59,14 +58,14 @@ func (h *History) append(line string) error {
 
 	lines := append(h.lines[:len(h.lines)-1], line)
 	if len(lines) > h.maxSize {
-		lines = lines[len(lines)-h.maxSize : len(lines)]
+		lines = lines[len(lines)-h.maxSize:]
 	}
 	h.lines = append(lines, "")
-	return ioutil.WriteFile(h.path, []byte(strings.Join(h.lines, "\n")), 0600)
+	return os.WriteFile(h.path, []byte(strings.Join(h.lines, "\n")), 0600)
 }
 
 func (h *History) override(str string) {
-	// You can update the history but they're not written to the file
+	// You can update the history, but they're not written to the file
 	if h.cursor == len(h.lines)-1 {
 		h.lines[h.cursor] = str
 	} else if h.cursor < len(h.lines)-1 {

src/history_test.go

@@ -1,9 +1,7 @@
 package fzf
 
 import (
-	"io/ioutil"
 	"os"
-	"os/user"
 	"runtime"
 	"testing"
 )
@@ -12,16 +10,12 @@ func TestHistory(t *testing.T) {
 	maxHistory := 50
 
 	// Invalid arguments
-	user, _ := user.Current()
 	var paths []string
 	if runtime.GOOS == "windows" {
 		// GOPATH should exist, so we shouldn't be able to override it
 		paths = []string{os.Getenv("GOPATH")}
 	} else {
 		paths = []string{"/etc", "/proc"}
-		if user.Name != "root" {
-			paths = append(paths, "/etc/sudoers")
-		}
 	}
 
 	for _, path := range paths {
@@ -30,7 +24,7 @@ func TestHistory(t *testing.T) {
 		}
 	}
 
-	f, _ := ioutil.TempFile("", "fzf-history")
+	f, _ := os.CreateTemp("", "fzf-history")
 	f.Close()
 
 	{ // Append lines

src/item.go

@@ -1,21 +1,35 @@
 package fzf
 
 import (
+	"math"
+
 	"github.com/junegunn/fzf/src/util"
 )
 
-// Item represents each input line
+type transformed struct {
+	// Because nth can be changed dynamically by change-nth action, we need to
+	// keep the revision number at the time of transformation.
+	revision revision
+	tokens   []Token
+}
+
+// Item represents each input line. 56 bytes.
 type Item struct {
-	index       int32
-	text        util.Chars
-	origText    *[]byte
-	colors      *[]ansiOffset
-	transformed []Token
+	text        util.Chars    // 32 = 24 + 1 + 1 + 2 + 4
+	transformed *transformed  // 8
+	origText    *[]byte       // 8
+	colors      *[]ansiOffset // 8
 }
 
 // Index returns ordinal index of the Item
 func (item *Item) Index() int32 {
-	return item.index
+	return item.text.Index
+}
+
+var minItem = Item{text: util.Chars{Index: math.MinInt32}}
+
+func (item *Item) TrimLength() uint16 {
+	return item.text.TrimLength()
 }
 
 // Colors returns ansiOffsets of the Item
@@ -37,3 +51,9 @@ func (item *Item) AsString(stripAnsi bool) string {
 	}
 	return item.text.ToString()
 }
+
+func (item *Item) acceptNth(stripAnsi bool, delimiter Delimiter, transformer func([]Token, int32) string) string {
+	tokens := Tokenize(item.AsString(stripAnsi), delimiter)
+	transformed := transformer(tokens, item.Index())
+	return StripLastDelimiter(transformed, delimiter)
+}

src/matcher.go

@@ -12,14 +12,16 @@ import (
 
 // MatchRequest represents a search request
 type MatchRequest struct {
-	chunks  []*Chunk
-	pattern *Pattern
-	final   bool
-	sort    bool
+	chunks   []*Chunk
+	pattern  *Pattern
+	final    bool
+	sort     bool
+	revision revision
 }
 
 // Matcher is responsible for performing search
 type Matcher struct {
+	cache          *ChunkCache
 	patternBuilder func([]rune) *Pattern
 	sort           bool
 	tac            bool
@@ -28,6 +30,7 @@ type Matcher struct {
 	partitions     int
 	slab           []*util.Slab
 	mergerCache    map[string]*Merger
+	revision       revision
 }
 
 const (
@@ -36,10 +39,11 @@ const (
 )
 
 // NewMatcher returns a new Matcher
-func NewMatcher(patternBuilder func([]rune) *Pattern,
-	sort bool, tac bool, eventBox *util.EventBox) *Matcher {
+func NewMatcher(cache *ChunkCache, patternBuilder func([]rune) *Pattern,
+	sort bool, tac bool, eventBox *util.EventBox, revision revision) *Matcher {
 	partitions := util.Min(numPartitionsMultiplier*runtime.NumCPU(), maxPartitions)
 	return &Matcher{
+		cache:          cache,
 		patternBuilder: patternBuilder,
 		sort:           sort,
 		tac:            tac,
@@ -47,7 +51,8 @@ func NewMatcher(patternBuilder func([]rune) *Pattern,
 		reqBox:         util.NewEventBox(),
 		partitions:     partitions,
 		slab:           make([]*util.Slab, partitions),
-		mergerCache:    make(map[string]*Merger)}
+		mergerCache:    make(map[string]*Merger),
+		revision:       revision}
 }
 
 // Loop puts Matcher in action
@@ -57,8 +62,13 @@ func (m *Matcher) Loop() {
 	for {
 		var request MatchRequest
 
+		stop := false
 		m.reqBox.Wait(func(events *util.Events) {
-			for _, val := range *events {
+			for t, val := range *events {
+				if t == reqQuit {
+					stop = true
+					return
+				}
 				switch val := val.(type) {
 				case MatchRequest:
 					request = val
@@ -68,11 +78,19 @@ func (m *Matcher) Loop() {
 			}
 			events.Clear()
 		})
+		if stop {
+			break
+		}
 
-		if request.sort != m.sort {
+		cacheCleared := false
+		if request.sort != m.sort || request.revision != m.revision {
 			m.sort = request.sort
+			m.revision = request.revision
 			m.mergerCache = make(map[string]*Merger)
-			clearChunkCache()
+			if !request.revision.compatible(m.revision) {
+				m.cache.Clear()
+			}
+			cacheCleared = true
 		}
 
 		// Restart search
@@ -81,20 +99,20 @@ func (m *Matcher) Loop() {
 		cancelled := false
 		count := CountItems(request.chunks)
 
-		foundCache := false
-		if count == prevCount {
-			// Look up mergerCache
-			if cached, found := m.mergerCache[patternString]; found {
-				foundCache = true
-				merger = cached
+		if !cacheCleared {
+			if count == prevCount {
+				// Look up mergerCache
+				if cached, found := m.mergerCache[patternString]; found && cached.final == request.final {
+					merger = cached
+				}
+			} else {
+				// Invalidate mergerCache
+				prevCount = count
+				m.mergerCache = make(map[string]*Merger)
 			}
-		} else {
-			// Invalidate mergerCache
-			prevCount = count
-			m.mergerCache = make(map[string]*Merger)
 		}
 
-		if !foundCache {
+		if merger == nil {
 			merger, cancelled = m.scan(request)
 		}
 
@@ -131,7 +149,7 @@ func (m *Matcher) sliceChunks(chunks []*Chunk) [][]*Chunk {
 
 type partialResult struct {
 	index   int
-	matches []*Result
+	matches []Result
 }
 
 func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
@@ -139,13 +157,14 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 
 	numChunks := len(request.chunks)
 	if numChunks == 0 {
-		return EmptyMerger, false
+		return EmptyMerger(request.revision), false
 	}
 	pattern := request.pattern
 	if pattern.IsEmpty() {
-		return PassMerger(&request.chunks, m.tac), false
+		return PassMerger(&request.chunks, m.tac, request.revision), false
 	}
 
+	minIndex := request.chunks[0].items[0].Index()
 	cancelled := util.NewAtomicBool(false)
 
 	slices := m.sliceChunks(request.chunks)
@@ -162,7 +181,7 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 		go func(idx int, slab *util.Slab, chunks []*Chunk) {
 			defer func() { waitGroup.Done() }()
 			count := 0
-			allMatches := make([][]*Result, len(chunks))
+			allMatches := make([][]Result, len(chunks))
 			for idx, chunk := range chunks {
 				matches := request.pattern.Match(chunk, slab)
 				allMatches[idx] = matches
@@ -172,11 +191,11 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 				}
 				countChan <- len(matches)
 			}
-			sliceMatches := make([]*Result, 0, count)
+			sliceMatches := make([]Result, 0, count)
 			for _, matches := range allMatches {
 				sliceMatches = append(sliceMatches, matches...)
 			}
-			if m.sort {
+			if m.sort && request.pattern.sortable {
 				if m.tac {
 					sort.Sort(ByRelevanceTac(sliceMatches))
 				} else {
@@ -207,21 +226,21 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 			return nil, wait()
 		}
 
-		if time.Now().Sub(startedAt) > progressMinDuration {
+		if time.Since(startedAt) > progressMinDuration {
 			m.eventBox.Set(EvtSearchProgress, float32(count)/float32(numChunks))
 		}
 	}
 
-	partialResults := make([][]*Result, numSlices)
-	for _ = range slices {
+	partialResults := make([][]Result, numSlices)
+	for range slices {
 		partialResult := <-resultChan
 		partialResults[partialResult.index] = partialResult.matches
 	}
-	return NewMerger(pattern, partialResults, m.sort, m.tac), false
+	return NewMerger(pattern, partialResults, m.sort && request.pattern.sortable, m.tac, request.revision, minIndex), false
 }
 
 // Reset is called to interrupt/signal the ongoing search
-func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final bool, sort bool) {
+func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final bool, sort bool, revision revision) {
 	pattern := m.patternBuilder(patternRunes)
 
 	var event util.EventType
@@ -230,5 +249,9 @@ func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final
 	} else {
 		event = reqRetry
 	}
-	m.reqBox.Set(event, MatchRequest{chunks, pattern, final, sort})
+	m.reqBox.Set(event, MatchRequest{chunks, pattern, final, sort, revision})
+}
+
+func (m *Matcher) Stop() {
+	m.reqBox.Set(reqQuit, nil)
 }

src/merger.go

@@ -3,49 +3,63 @@ package fzf
 import "fmt"
 
 // EmptyMerger is a Merger with no data
-var EmptyMerger = NewMerger(nil, [][]*Result{}, false, false)
+func EmptyMerger(revision revision) *Merger {
+	return NewMerger(nil, [][]Result{}, false, false, revision, 0)
+}
 
 // Merger holds a set of locally sorted lists of items and provides the view of
 // a single, globally-sorted list
 type Merger struct {
-	pattern *Pattern
-	lists   [][]*Result
-	merged  []*Result
-	chunks  *[]*Chunk
-	cursors []int
-	sorted  bool
-	tac     bool
-	final   bool
-	count   int
+	pattern  *Pattern
+	lists    [][]Result
+	merged   []Result
+	chunks   *[]*Chunk
+	cursors  []int
+	sorted   bool
+	tac      bool
+	final    bool
+	count    int
+	pass     bool
+	revision revision
+	minIndex int32
 }
 
 // PassMerger returns a new Merger that simply returns the items in the
 // original order
-func PassMerger(chunks *[]*Chunk, tac bool) *Merger {
+func PassMerger(chunks *[]*Chunk, tac bool, revision revision) *Merger {
+	var minIndex int32
+	if len(*chunks) > 0 {
+		minIndex = (*chunks)[0].items[0].Index()
+	}
 	mg := Merger{
-		pattern: nil,
-		chunks:  chunks,
-		tac:     tac,
-		count:   0}
+		pattern:  nil,
+		chunks:   chunks,
+		tac:      tac,
+		count:    0,
+		pass:     true,
+		revision: revision,
+		minIndex: minIndex}
 
 	for _, chunk := range *mg.chunks {
-		mg.count += len(*chunk)
+		mg.count += chunk.count
 	}
 	return &mg
 }
 
 // NewMerger returns a new Merger
-func NewMerger(pattern *Pattern, lists [][]*Result, sorted bool, tac bool) *Merger {
+func NewMerger(pattern *Pattern, lists [][]Result, sorted bool, tac bool, revision revision, minIndex int32) *Merger {
 	mg := Merger{
-		pattern: pattern,
-		lists:   lists,
-		merged:  []*Result{},
-		chunks:  nil,
-		cursors: make([]int, len(lists)),
-		sorted:  sorted,
-		tac:     tac,
-		final:   false,
-		count:   0}
+		pattern:  pattern,
+		lists:    lists,
+		merged:   []Result{},
+		chunks:   nil,
+		cursors:  make([]int, len(lists)),
+		sorted:   sorted,
+		tac:      tac,
+		final:    false,
+		count:    0,
+		revision: revision,
+		minIndex: minIndex}
 
 	for _, list := range mg.lists {
 		mg.count += len(list)
@@ -53,19 +67,57 @@ func NewMerger(pattern *Pattern, lists [][]*Result, sorted bool, tac bool) *Merg
 	return &mg
 }
 
+// Revision returns revision number
+func (mg *Merger) Revision() revision {
+	return mg.revision
+}
+
 // Length returns the number of items
 func (mg *Merger) Length() int {
 	return mg.count
 }
 
+func (mg *Merger) First() Result {
+	if mg.tac && !mg.sorted {
+		return mg.Get(mg.count - 1)
+	}
+	return mg.Get(0)
+}
+
+// FindIndex returns the index of the item with the given item index
+func (mg *Merger) FindIndex(itemIndex int32) int {
+	index := -1
+	if mg.pass {
+		index = int(itemIndex - mg.minIndex)
+		if mg.tac {
+			index = mg.count - index - 1
+		}
+	} else {
+		for i := 0; i < mg.count; i++ {
+			if mg.Get(i).item.Index() == itemIndex {
+				index = i
+				break
+			}
+		}
+	}
+	return index
+}
+
 // Get returns the pointer to the Result object indexed by the given integer
-func (mg *Merger) Get(idx int) *Result {
+func (mg *Merger) Get(idx int) Result {
 	if mg.chunks != nil {
 		if mg.tac {
 			idx = mg.count - idx - 1
 		}
+		firstChunk := (*mg.chunks)[0]
+		if firstChunk.count < chunkSize && idx >= firstChunk.count {
+			idx -= firstChunk.count
+
+			chunk := (*mg.chunks)[idx/chunkSize+1]
+			return Result{item: &chunk.items[idx%chunkSize]}
+		}
 		chunk := (*mg.chunks)[idx/chunkSize]
-		return &Result{item: (*chunk)[idx%chunkSize]}
+		return Result{item: &chunk.items[idx%chunkSize]}
 	}
 
 	if mg.sorted {
@@ -89,7 +141,7 @@ func (mg *Merger) cacheable() bool {
 	return mg.count < mergerCacheMax
 }
 
-func (mg *Merger) mergedGet(idx int) *Result {
+func (mg *Merger) mergedGet(idx int) Result {
 	for i := len(mg.merged); i <= idx; i++ {
 		minRank := minRank()
 		minIdx := -1
@@ -100,13 +152,12 @@ func (mg *Merger) mergedGet(idx int) *Result {
 				continue
 			}
 			if cursor >= 0 {
-				rank := list[cursor].rank
+				rank := list[cursor]
 				if minIdx < 0 || compareRanks(rank, minRank, mg.tac) {
 					minRank = rank
 					minIdx = listIdx
 				}
 			}
-			mg.cursors[listIdx] = cursor
 		}
 
 		if minIdx >= 0 {

src/merger_test.go

@@ -15,28 +15,29 @@ func assert(t *testing.T, cond bool, msg ...string) {
 	}
 }
 
-func randResult() *Result {
+func randResult() Result {
 	str := fmt.Sprintf("%d", rand.Uint32())
-	return &Result{
-		item: &Item{text: util.RunesToChars([]rune(str))},
-		rank: rank{index: rand.Int31()}}
+	chars := util.ToChars([]byte(str))
+	chars.Index = rand.Int31()
+	return Result{item: &Item{text: chars}}
 }
 
 func TestEmptyMerger(t *testing.T) {
-	assert(t, EmptyMerger.Length() == 0, "Not empty")
-	assert(t, EmptyMerger.count == 0, "Invalid count")
-	assert(t, len(EmptyMerger.lists) == 0, "Invalid lists")
-	assert(t, len(EmptyMerger.merged) == 0, "Invalid merged list")
+	r := revision{}
+	assert(t, EmptyMerger(r).Length() == 0, "Not empty")
+	assert(t, EmptyMerger(r).count == 0, "Invalid count")
+	assert(t, len(EmptyMerger(r).lists) == 0, "Invalid lists")
+	assert(t, len(EmptyMerger(r).merged) == 0, "Invalid merged list")
 }
 
-func buildLists(partiallySorted bool) ([][]*Result, []*Result) {
+func buildLists(partiallySorted bool) ([][]Result, []Result) {
 	numLists := 4
-	lists := make([][]*Result, numLists)
+	lists := make([][]Result, numLists)
 	cnt := 0
 	for i := 0; i < numLists; i++ {
 		numResults := rand.Int() % 20
 		cnt += numResults
-		lists[i] = make([]*Result, numResults)
+		lists[i] = make([]Result, numResults)
 		for j := 0; j < numResults; j++ {
 			item := randResult()
 			lists[i][j] = item
@@ -45,7 +46,7 @@ func buildLists(partiallySorted bool) ([][]*Result, []*Result) {
 			sort.Sort(ByRelevance(lists[i]))
 		}
 	}
-	items := []*Result{}
+	items := []Result{}
 	for _, list := range lists {
 		items = append(items, list...)
 	}
@@ -57,7 +58,7 @@ func TestMergerUnsorted(t *testing.T) {
 	cnt := len(items)
 
 	// Not sorted: same order
-	mg := NewMerger(nil, lists, false, false)
+	mg := NewMerger(nil, lists, false, false, revision{}, 0)
 	assert(t, cnt == mg.Length(), "Invalid Length")
 	for i := 0; i < cnt; i++ {
 		assert(t, items[i] == mg.Get(i), "Invalid Get")
@@ -69,7 +70,7 @@ func TestMergerSorted(t *testing.T) {
 	cnt := len(items)
 
 	// Sorted sorted order
-	mg := NewMerger(nil, lists, true, false)
+	mg := NewMerger(nil, lists, true, false, revision{}, 0)
 	assert(t, cnt == mg.Length(), "Invalid Length")
 	sort.Sort(ByRelevance(items))
 	for i := 0; i < cnt; i++ {
@@ -79,7 +80,7 @@ func TestMergerSorted(t *testing.T) {
 	}
 
 	// Inverse order
-	mg2 := NewMerger(nil, lists, true, false)
+	mg2 := NewMerger(nil, lists, true, false, revision{}, 0)
 	for i := cnt - 1; i >= 0; i-- {
 		if items[i] != mg2.Get(i) {
 			t.Error("Not sorted", items[i], mg2.Get(i))

src/options_no_pprof.go

@@ -0,0 +1,13 @@
+//go:build !pprof
+// +build !pprof
+
+package fzf
+
+import "errors"
+
+func (o *Options) initProfiling() error {
+	if o.CPUProfile != "" || o.MEMProfile != "" || o.BlockProfile != "" || o.MutexProfile != "" {
+		return errors.New("error: profiling not supported: FZF must be built with '-tags=pprof' to enable profiling")
+	}
+	return nil
+}

src/options_pprof.go

@@ -0,0 +1,73 @@
+//go:build pprof
+// +build pprof
+
+package fzf
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+	"runtime/pprof"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func (o *Options) initProfiling() error {
+	if o.CPUProfile != "" {
+		f, err := os.Create(o.CPUProfile)
+		if err != nil {
+			return fmt.Errorf("could not create CPU profile: %w", err)
+		}
+
+		if err := pprof.StartCPUProfile(f); err != nil {
+			return fmt.Errorf("could not start CPU profile: %w", err)
+		}
+
+		util.AtExit(func() {
+			pprof.StopCPUProfile()
+			if err := f.Close(); err != nil {
+				fmt.Fprintln(os.Stderr, "Error: closing cpu profile:", err)
+			}
+		})
+	}
+
+	stopProfile := func(name string, f *os.File) {
+		if err := pprof.Lookup(name).WriteTo(f, 0); err != nil {
+			fmt.Fprintf(os.Stderr, "Error: could not write %s profile: %v\n", name, err)
+		}
+		if err := f.Close(); err != nil {
+			fmt.Fprintf(os.Stderr, "Error: closing %s profile: %v\n", name, err)
+		}
+	}
+
+	if o.MEMProfile != "" {
+		f, err := os.Create(o.MEMProfile)
+		if err != nil {
+			return fmt.Errorf("could not create MEM profile: %w", err)
+		}
+		util.AtExit(func() {
+			runtime.GC()
+			stopProfile("allocs", f)
+		})
+	}
+
+	if o.BlockProfile != "" {
+		runtime.SetBlockProfileRate(1)
+		f, err := os.Create(o.BlockProfile)
+		if err != nil {
+			return fmt.Errorf("could not create BLOCK profile: %w", err)
+		}
+		util.AtExit(func() { stopProfile("block", f) })
+	}
+
+	if o.MutexProfile != "" {
+		runtime.SetMutexProfileFraction(1)
+		f, err := os.Create(o.MutexProfile)
+		if err != nil {
+			return fmt.Errorf("could not create MUTEX profile: %w", err)
+		}
+		util.AtExit(func() { stopProfile("mutex", f) })
+	}
+
+	return nil
+}

src/options_pprof_test.go

@@ -0,0 +1,89 @@
+//go:build pprof
+// +build pprof
+
+package fzf
+
+import (
+	"bytes"
+	"flag"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+// runInitProfileTests is an internal flag used TestInitProfiling
+var runInitProfileTests = flag.Bool("test-init-profile", false, "run init profile tests")
+
+func TestInitProfiling(t *testing.T) {
+	if testing.Short() {
+		t.Skip("short test")
+	}
+
+	// Run this test in a separate process since it interferes with
+	// profiling and modifies the global atexit state. Without this
+	// running `go test -bench . -cpuprofile cpu.out` will fail.
+	if !*runInitProfileTests {
+		t.Parallel()
+
+		// Make sure we are not the child process.
+		if os.Getenv("_FZF_CHILD_PROC") != "" {
+			t.Fatal("already running as child process!")
+		}
+
+		cmd := exec.Command(os.Args[0],
+			"-test.timeout", "30s",
+			"-test.run", "^"+t.Name()+"$",
+			"-test-init-profile",
+		)
+		cmd.Env = append(os.Environ(), "_FZF_CHILD_PROC=1")
+
+		out, err := cmd.CombinedOutput()
+		out = bytes.TrimSpace(out)
+		if err != nil {
+			t.Fatalf("Child test process failed: %v:\n%s", err, out)
+		}
+		// Make sure the test actually ran
+		if bytes.Contains(out, []byte("no tests to run")) {
+			t.Fatalf("Failed to run test %q:\n%s", t.Name(), out)
+		}
+		return
+	}
+
+	// Child process
+
+	tempdir := t.TempDir()
+	t.Cleanup(util.RunAtExitFuncs)
+
+	o := Options{
+		CPUProfile:   filepath.Join(tempdir, "cpu.prof"),
+		MEMProfile:   filepath.Join(tempdir, "mem.prof"),
+		BlockProfile: filepath.Join(tempdir, "block.prof"),
+		MutexProfile: filepath.Join(tempdir, "mutex.prof"),
+	}
+	if err := o.initProfiling(); err != nil {
+		t.Fatal(err)
+	}
+
+	profiles := []string{
+		o.CPUProfile,
+		o.MEMProfile,
+		o.BlockProfile,
+		o.MutexProfile,
+	}
+	for _, name := range profiles {
+		if _, err := os.Stat(name); err != nil {
+			t.Errorf("Failed to create profile %s: %v", filepath.Base(name), err)
+		}
+	}
+
+	util.RunAtExitFuncs()
+
+	for _, name := range profiles {
+		if _, err := os.Stat(name); err != nil {
+			t.Errorf("Failed to write profile %s: %v", filepath.Base(name), err)
+		}
+	}
+}

src/options_test.go

@@ -2,17 +2,20 @@ package fzf
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"testing"
 
 	"github.com/junegunn/fzf/src/tui"
-	"github.com/junegunn/fzf/src/util"
 )
 
 func TestDelimiterRegex(t *testing.T) {
-	// Valid regex
+	// Valid regex, but a single character -> string
 	delim := delimiterRegexp(".")
-	if delim.regex == nil || delim.str != nil {
+	if delim.regex != nil || *delim.str != "." {
+		t.Error(delim)
+	}
+	delim = delimiterRegexp("|")
+	if delim.regex != nil || *delim.str != "|" {
 		t.Error(delim)
 	}
 	// Broken regex -> string
@@ -44,20 +47,20 @@ func TestDelimiterRegex(t *testing.T) {
 
 func TestDelimiterRegexString(t *testing.T) {
 	delim := delimiterRegexp("*")
-	tokens := Tokenize(util.RunesToChars([]rune("-*--*---**---")), delim)
+	tokens := Tokenize("-*--*---**---", delim)
 	if delim.regex != nil ||
 		tokens[0].text.ToString() != "-*" ||
 		tokens[1].text.ToString() != "--*" ||
 		tokens[2].text.ToString() != "---*" ||
 		tokens[3].text.ToString() != "*" ||
 		tokens[4].text.ToString() != "---" {
-		t.Errorf("%s %s %d", delim, tokens, len(tokens))
+		t.Errorf("%s %v %d", delim, tokens, len(tokens))
 	}
 }
 
 func TestDelimiterRegexRegex(t *testing.T) {
 	delim := delimiterRegexp("--\\*")
-	tokens := Tokenize(util.RunesToChars([]rune("-*--*---**---")), delim)
+	tokens := Tokenize("-*--*---**---", delim)
 	if delim.str != nil ||
 		tokens[0].text.ToString() != "-*--*" ||
 		tokens[1].text.ToString() != "---*" ||
@@ -66,17 +69,30 @@ func TestDelimiterRegexRegex(t *testing.T) {
 	}
 }
 
+func TestDelimiterRegexRegexCaret(t *testing.T) {
+	delim := delimiterRegexp(`(^\s*|\s+)`)
+	tokens := Tokenize("foo  bar baz", delim)
+	if delim.str != nil ||
+		len(tokens) != 4 ||
+		tokens[0].text.ToString() != "" ||
+		tokens[1].text.ToString() != "foo  " ||
+		tokens[2].text.ToString() != "bar " ||
+		tokens[3].text.ToString() != "baz" {
+		t.Errorf("%s %d", tokens, len(tokens))
+	}
+}
+
 func TestSplitNth(t *testing.T) {
 	{
-		ranges := splitNth("..")
+		ranges, _ := splitNth("..")
 		if len(ranges) != 1 ||
 			ranges[0].begin != rangeEllipsis ||
 			ranges[0].end != rangeEllipsis {
-			t.Errorf("%s", ranges)
+			t.Errorf("%v", ranges)
 		}
 	}
 	{
-		ranges := splitNth("..3,1..,2..3,4..-1,-3..-2,..,2,-2,2..-2,1..-1")
+		ranges, _ := splitNth("..3,1..,2..3,4..-1,-3..-2,..,2,-2,2..-2,1..-1")
 		if len(ranges) != 10 ||
 			ranges[0].begin != rangeEllipsis || ranges[0].end != 3 ||
 			ranges[1].begin != rangeEllipsis || ranges[1].end != rangeEllipsis ||
@@ -88,94 +104,99 @@ func TestSplitNth(t *testing.T) {
 			ranges[7].begin != -2 || ranges[7].end != -2 ||
 			ranges[8].begin != 2 || ranges[8].end != -2 ||
 			ranges[9].begin != rangeEllipsis || ranges[9].end != rangeEllipsis {
-			t.Errorf("%s", ranges)
+			t.Errorf("%v", ranges)
 		}
 	}
 }
 
 func TestIrrelevantNth(t *testing.T) {
+	index := 0
 	{
 		opts := defaultOptions()
 		words := []string{"--nth", "..", "-x"}
-		parseOptions(opts, words)
+		parseOptions(&index, opts, words)
 		postProcessOptions(opts)
 		if len(opts.Nth) != 0 {
-			t.Errorf("nth should be empty: %s", opts.Nth)
+			t.Errorf("nth should be empty: %v", opts.Nth)
 		}
 	}
-	for _, words := range [][]string{[]string{"--nth", "..,3", "+x"}, []string{"--nth", "3,1..", "+x"}, []string{"--nth", "..-1,1", "+x"}} {
+	for _, words := range [][]string{{"--nth", "..,3", "+x"}, {"--nth", "3,1..", "+x"}, {"--nth", "..-1,1", "+x"}} {
 		{
 			opts := defaultOptions()
-			parseOptions(opts, words)
+			parseOptions(&index, opts, words)
 			postProcessOptions(opts)
 			if len(opts.Nth) != 0 {
-				t.Errorf("nth should be empty: %s", opts.Nth)
+				t.Errorf("nth should be empty: %v", opts.Nth)
 			}
 		}
 		{
 			opts := defaultOptions()
 			words = append(words, "-x")
-			parseOptions(opts, words)
+			parseOptions(&index, opts, words)
 			postProcessOptions(opts)
 			if len(opts.Nth) != 2 {
-				t.Errorf("nth should not be empty: %s", opts.Nth)
+				t.Errorf("nth should not be empty: %v", opts.Nth)
 			}
 		}
 	}
 }
 
 func TestParseKeys(t *testing.T) {
-	pairs := parseKeyChords("ctrl-z,alt-z,f2,@,Alt-a,!,ctrl-G,J,g,ALT-enter,alt-SPACE", "")
-	check := func(i int, s string) {
-		if pairs[i] != s {
-			t.Errorf("%s != %s", pairs[i], s)
+	pairs, _ := parseKeyChords("ctrl-z,alt-z,f2,@,Alt-a,!,ctrl-G,J,g,ctrl-alt-a,ALT-enter,alt-SPACE", "")
+	checkEvent := func(e tui.Event, s string) {
+		if pairs[e] != s {
+			t.Errorf("%s != %s", pairs[e], s)
 		}
 	}
-	if len(pairs) != 11 {
-		t.Error(11)
+	check := func(et tui.EventType, s string) {
+		checkEvent(et.AsEvent(), s)
+	}
+	if len(pairs) != 12 {
+		t.Error(12)
 	}
 	check(tui.CtrlZ, "ctrl-z")
-	check(tui.AltZ, "alt-z")
 	check(tui.F2, "f2")
-	check(tui.AltZ+'@', "@")
-	check(tui.AltA, "Alt-a")
-	check(tui.AltZ+'!', "!")
-	check(tui.CtrlA+'g'-'a', "ctrl-G")
-	check(tui.AltZ+'J', "J")
-	check(tui.AltZ+'g', "g")
-	check(tui.AltEnter, "ALT-enter")
-	check(tui.AltSpace, "alt-SPACE")
+	check(tui.CtrlG, "ctrl-G")
+	checkEvent(tui.AltKey('z'), "alt-z")
+	checkEvent(tui.Key('@'), "@")
+	checkEvent(tui.AltKey('a'), "Alt-a")
+	checkEvent(tui.Key('!'), "!")
+	checkEvent(tui.Key('J'), "J")
+	checkEvent(tui.Key('g'), "g")
+	checkEvent(tui.CtrlAltKey('a'), "ctrl-alt-a")
+	checkEvent(tui.CtrlAltKey('m'), "ALT-enter")
+	checkEvent(tui.AltKey(' '), "alt-SPACE")
 
 	// Synonyms
-	pairs = parseKeyChords("enter,Return,space,tab,btab,esc,up,down,left,right", "")
+	pairs, _ = parseKeyChords("enter,Return,space,tab,btab,esc,up,down,left,right", "")
 	if len(pairs) != 9 {
 		t.Error(9)
 	}
-	check(tui.CtrlM, "Return")
-	check(tui.AltZ+' ', "space")
+	check(tui.Enter, "Return")
+	checkEvent(tui.Key(' '), "space")
 	check(tui.Tab, "tab")
-	check(tui.BTab, "btab")
-	check(tui.ESC, "esc")
+	check(tui.ShiftTab, "btab")
+	check(tui.Esc, "esc")
 	check(tui.Up, "up")
 	check(tui.Down, "down")
 	check(tui.Left, "left")
 	check(tui.Right, "right")
 
-	pairs = parseKeyChords("Tab,Ctrl-I,PgUp,page-up,pgdn,Page-Down,Home,End,Alt-BS,Alt-BSpace,shift-left,shift-right,btab,shift-tab,return,Enter,bspace", "")
+	pairs, _ = parseKeyChords("Tab,Ctrl-I,PgUp,page-up,pgdn,Page-Down,Home,End,Alt-BS,Alt-BSpace,shift-left,shift-right,btab,shift-tab,return,Enter,bspace", "")
 	if len(pairs) != 11 {
 		t.Error(11)
 	}
 	check(tui.Tab, "Ctrl-I")
-	check(tui.PgUp, "page-up")
-	check(tui.PgDn, "Page-Down")
+	check(tui.PageUp, "page-up")
+	check(tui.PageDown, "Page-Down")
 	check(tui.Home, "Home")
 	check(tui.End, "End")
-	check(tui.AltBS, "Alt-BSpace")
-	check(tui.SLeft, "shift-left")
-	check(tui.SRight, "shift-right")
-	check(tui.BTab, "shift-tab")
-	check(tui.CtrlM, "Enter")
-	check(tui.BSpace, "bspace")
+	check(tui.AltBackspace, "Alt-BSpace")
+	check(tui.ShiftLeft, "shift-left")
+	check(tui.ShiftRight, "shift-right")
+	check(tui.ShiftTab, "shift-tab")
+	check(tui.Enter, "Enter")
+	check(tui.Backspace, "bspace")
 }
 
 func TestParseKeysWithComma(t *testing.T) {
@@ -184,95 +205,103 @@ func TestParseKeysWithComma(t *testing.T) {
 			t.Errorf("%d != %d", a, b)
 		}
 	}
-	check := func(pairs map[int]string, i int, s string) {
-		if pairs[i] != s {
-			t.Errorf("%s != %s", pairs[i], s)
+	check := func(pairs map[tui.Event]string, e tui.Event, s string) {
+		if pairs[e] != s {
+			t.Errorf("%s != %s", pairs[e], s)
 		}
 	}
 
-	pairs := parseKeyChords(",", "")
+	pairs, _ := parseKeyChords(",", "")
 	checkN(len(pairs), 1)
-	check(pairs, tui.AltZ+',', ",")
+	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords(",,a,b", "")
+	pairs, _ = parseKeyChords(",,a,b", "")
 	checkN(len(pairs), 3)
-	check(pairs, tui.AltZ+'a', "a")
-	check(pairs, tui.AltZ+'b', "b")
-	check(pairs, tui.AltZ+',', ",")
+	check(pairs, tui.Key('a'), "a")
+	check(pairs, tui.Key('b'), "b")
+	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords("a,b,,", "")
+	pairs, _ = parseKeyChords("a,b,,", "")
 	checkN(len(pairs), 3)
-	check(pairs, tui.AltZ+'a', "a")
-	check(pairs, tui.AltZ+'b', "b")
-	check(pairs, tui.AltZ+',', ",")
+	check(pairs, tui.Key('a'), "a")
+	check(pairs, tui.Key('b'), "b")
+	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords("a,,,b", "")
+	pairs, _ = parseKeyChords("a,,,b", "")
 	checkN(len(pairs), 3)
-	check(pairs, tui.AltZ+'a', "a")
-	check(pairs, tui.AltZ+'b', "b")
-	check(pairs, tui.AltZ+',', ",")
+	check(pairs, tui.Key('a'), "a")
+	check(pairs, tui.Key('b'), "b")
+	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords("a,,,b,c", "")
+	pairs, _ = parseKeyChords("a,,,b,c", "")
 	checkN(len(pairs), 4)
-	check(pairs, tui.AltZ+'a', "a")
-	check(pairs, tui.AltZ+'b', "b")
-	check(pairs, tui.AltZ+'c', "c")
-	check(pairs, tui.AltZ+',', ",")
+	check(pairs, tui.Key('a'), "a")
+	check(pairs, tui.Key('b'), "b")
+	check(pairs, tui.Key('c'), "c")
+	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords(",,,", "")
+	pairs, _ = parseKeyChords(",,,", "")
 	checkN(len(pairs), 1)
-	check(pairs, tui.AltZ+',', ",")
+	check(pairs, tui.Key(','), ",")
+
+	pairs, _ = parseKeyChords(",ALT-,,", "")
+	checkN(len(pairs), 1)
+	check(pairs, tui.AltKey(','), "ALT-,")
 }
 
 func TestBind(t *testing.T) {
-	check := func(action actionType, expected actionType) {
-		if action != expected {
-			t.Errorf("%d != %d", action, expected)
-		}
-	}
-	checkString := func(action string, expected string) {
-		if action != expected {
-			t.Errorf("%d != %d", action, expected)
-		}
-	}
 	keymap := defaultKeymap()
-	execmap := make(map[int]string)
-	check(actBeginningOfLine, keymap[tui.CtrlA])
-	parseKeymap(keymap, execmap,
-		"ctrl-a:kill-line,ctrl-b:toggle-sort,c:page-up,alt-z:page-down,"+
-			"f1:execute(ls {}),f2:execute/echo {}, {}, {}/,f3:execute[echo '({})'],f4:execute;less {};,"+
-			"alt-a:execute@echo (,),[,],/,:,;,%,{}@,alt-b:execute;echo (,),[,],/,:,@,%,{};"+
-			",,:abort,::accept,X:execute:\nfoobar,Y:execute(baz)")
-	check(actKillLine, keymap[tui.CtrlA])
-	check(actToggleSort, keymap[tui.CtrlB])
-	check(actPageUp, keymap[tui.AltZ+'c'])
-	check(actAbort, keymap[tui.AltZ+','])
-	check(actAccept, keymap[tui.AltZ+':'])
-	check(actPageDown, keymap[tui.AltZ])
-	check(actExecute, keymap[tui.F1])
-	check(actExecute, keymap[tui.F2])
-	check(actExecute, keymap[tui.F3])
-	check(actExecute, keymap[tui.F4])
-	checkString("ls {}", execmap[tui.F1])
-	checkString("echo {}, {}, {}", execmap[tui.F2])
-	checkString("echo '({})'", execmap[tui.F3])
-	checkString("less {}", execmap[tui.F4])
-	checkString("echo (,),[,],/,:,;,%,{}", execmap[tui.AltA])
-	checkString("echo (,),[,],/,:,@,%,{}", execmap[tui.AltB])
-	checkString("\nfoobar,Y:execute(baz)", execmap[tui.AltZ+'X'])
+	check := func(event tui.Event, arg1 string, types ...actionType) {
+		if len(keymap[event]) != len(types) {
+			t.Errorf("invalid number of actions for %v (%d != %d)",
+				event, len(types), len(keymap[event]))
+			return
+		}
+		for idx, action := range keymap[event] {
+			if types[idx] != action.t {
+				t.Errorf("invalid action type (%d != %d)", types[idx], action.t)
+			}
+		}
+		if len(arg1) > 0 && keymap[event][0].a != arg1 {
+			t.Errorf("invalid action argument: (%s != %s)", arg1, keymap[event][0].a)
+		}
+	}
+	check(tui.CtrlA.AsEvent(), "", actBeginningOfLine)
+	parseKeymap(keymap,
+		"ctrl-a:kill-line,ctrl-b:toggle-sort+up+down,c:page-up,alt-z:page-down,"+
+			"f1:execute(ls {+})+abort+execute(echo \n{+})+select-all,f2:execute/echo {}, {}, {}/,f3:execute[echo '({})'],f4:execute;less {};,"+
+			"alt-a:execute-Multi@echo (,),[,],/,:,;,%,{}@,alt-b:execute;echo (,),[,],/,:,@,%,{};,"+
+			"x:Execute(foo+bar),X:execute/bar+baz/"+
+			",f1:+first,f1:+top"+
+			",,:abort,::accept,+:execute:++\nfoobar,Y:execute(baz)+up")
+	check(tui.CtrlA.AsEvent(), "", actKillLine)
+	check(tui.CtrlB.AsEvent(), "", actToggleSort, actUp, actDown)
+	check(tui.Key('c'), "", actPageUp)
+	check(tui.Key(','), "", actAbort)
+	check(tui.Key(':'), "", actAccept)
+	check(tui.AltKey('z'), "", actPageDown)
+	check(tui.F1.AsEvent(), "ls {+}", actExecute, actAbort, actExecute, actSelectAll, actFirst, actFirst)
+	check(tui.F2.AsEvent(), "echo {}, {}, {}", actExecute)
+	check(tui.F3.AsEvent(), "echo '({})'", actExecute)
+	check(tui.F4.AsEvent(), "less {}", actExecute)
+	check(tui.Key('x'), "foo+bar", actExecute)
+	check(tui.Key('X'), "bar+baz", actExecute)
+	check(tui.AltKey('a'), "echo (,),[,],/,:,;,%,{}", actExecuteMulti)
+	check(tui.AltKey('b'), "echo (,),[,],/,:,@,%,{}", actExecute)
+	check(tui.Key('+'), "++\nfoobar,Y:execute(baz)+up", actExecute)
 
 	for idx, char := range []rune{'~', '!', '@', '#', '$', '%', '^', '&', '*', '|', ';', '/'} {
-		parseKeymap(keymap, execmap, fmt.Sprintf("%d:execute%cfoobar%c", idx%10, char, char))
-		checkString("foobar", execmap[tui.AltZ+int([]rune(fmt.Sprintf("%d", idx%10))[0])])
+		parseKeymap(keymap, fmt.Sprintf("%d:execute%cfoobar%c", idx%10, char, char))
+		check(tui.Key([]rune(fmt.Sprintf("%d", idx%10))[0]), "foobar", actExecute)
 	}
 
-	parseKeymap(keymap, execmap, "f1:abort")
-	check(actAbort, keymap[tui.F1])
+	parseKeymap(keymap, "f1:abort")
+	check(tui.F1.AsEvent(), "", actAbort)
 }
 
 func TestColorSpec(t *testing.T) {
 	theme := tui.Dark256
-	dark := parseTheme(theme, "dark")
+	dark, _ := parseTheme(theme, "dark")
 	if *dark != *theme {
 		t.Errorf("colors should be equivalent")
 	}
@@ -280,7 +309,7 @@ func TestColorSpec(t *testing.T) {
 		t.Errorf("point should not be equivalent")
 	}
 
-	light := parseTheme(theme, "dark,light")
+	light, _ := parseTheme(theme, "dark,light")
 	if *light == *theme {
 		t.Errorf("should not be equivalent")
 	}
@@ -291,8 +320,8 @@ func TestColorSpec(t *testing.T) {
 		t.Errorf("point should not be equivalent")
 	}
 
-	customized := parseTheme(theme, "fg:231,bg:232")
-	if customized.Fg != 231 || customized.Bg != 232 {
+	customized, _ := parseTheme(theme, "fg:231,bg:232")
+	if customized.Fg.Color != 231 || customized.Bg.Color != 232 {
 		t.Errorf("color not customized")
 	}
 	if *tui.Dark256 == *customized {
@@ -304,30 +333,20 @@ func TestColorSpec(t *testing.T) {
 		t.Errorf("colors should now be equivalent: %v, %v", tui.Dark256, customized)
 	}
 
-	customized = parseTheme(theme, "fg:231,dark,bg:232")
+	customized, _ = parseTheme(theme, "fg:231,dark   bg:232")
 	if customized.Fg != tui.Dark256.Fg || customized.Bg == tui.Dark256.Bg {
 		t.Errorf("color not customized")
 	}
 }
 
-func TestParseNilTheme(t *testing.T) {
-	var theme *tui.ColorTheme
-	newTheme := parseTheme(theme, "prompt:12")
-	if newTheme != nil {
-		t.Errorf("color is disabled. keep it that way.")
-	}
-	newTheme = parseTheme(theme, "prompt:12,dark,prompt:13")
-	if newTheme.Prompt != 13 {
-		t.Errorf("color should now be enabled and customized")
-	}
-}
-
 func TestDefaultCtrlNP(t *testing.T) {
-	check := func(words []string, key int, expected actionType) {
+	index := 0
+	check := func(words []string, et tui.EventType, expected actionType) {
+		e := et.AsEvent()
 		opts := defaultOptions()
-		parseOptions(opts, words)
+		parseOptions(&index, opts, words)
 		postProcessOptions(opts)
-		if opts.Keymap[key] != expected {
+		if opts.Keymap[e][0].t != expected {
 			t.Error()
 		}
 	}
@@ -337,22 +356,23 @@ func TestDefaultCtrlNP(t *testing.T) {
 	check([]string{"--bind=ctrl-n:accept"}, tui.CtrlN, actAccept)
 	check([]string{"--bind=ctrl-p:accept"}, tui.CtrlP, actAccept)
 
-	f, _ := ioutil.TempFile("", "fzf-history")
+	f, _ := os.CreateTemp("", "fzf-history")
 	f.Close()
 	hist := "--history=" + f.Name()
 	check([]string{hist}, tui.CtrlN, actNextHistory)
-	check([]string{hist}, tui.CtrlP, actPreviousHistory)
+	check([]string{hist}, tui.CtrlP, actPrevHistory)
 
 	check([]string{hist, "--bind=ctrl-n:accept"}, tui.CtrlN, actAccept)
-	check([]string{hist, "--bind=ctrl-n:accept"}, tui.CtrlP, actPreviousHistory)
+	check([]string{hist, "--bind=ctrl-n:accept"}, tui.CtrlP, actPrevHistory)
 
 	check([]string{hist, "--bind=ctrl-p:accept"}, tui.CtrlN, actNextHistory)
 	check([]string{hist, "--bind=ctrl-p:accept"}, tui.CtrlP, actAccept)
 }
 
 func optsFor(words ...string) *Options {
+	index := 0
 	opts := defaultOptions()
-	parseOptions(opts, words)
+	parseOptions(&index, opts, words)
 	postProcessOptions(opts)
 	return opts
 }
@@ -384,23 +404,26 @@ func TestPreviewOpts(t *testing.T) {
 		opts.Preview.size.size == 50) {
 		t.Error()
 	}
-	opts = optsFor("--preview", "cat {}", "--preview-window=left:15:hidden:wrap")
+	opts = optsFor("--preview", "cat {}", "--preview-window=left:15,hidden,wrap:+{1}-/2")
 	if !(opts.Preview.command == "cat {}" &&
 		opts.Preview.hidden == true &&
 		opts.Preview.wrap == true &&
 		opts.Preview.position == posLeft &&
+		opts.Preview.scroll == "+{1}-/2" &&
 		opts.Preview.size.percent == false &&
-		opts.Preview.size.size == 15+2+2) {
+		opts.Preview.size.size == 15) {
 		t.Error(opts.Preview)
 	}
-	opts = optsFor("--preview-window=up:15:wrap:hidden", "--preview-window=down")
+	opts = optsFor("--preview-window=up,15,wrap,hidden,+{1}+3-1-2/2", "--preview-window=down", "--preview-window=cycle")
 	if !(opts.Preview.command == "" &&
-		opts.Preview.hidden == false &&
-		opts.Preview.wrap == false &&
+		opts.Preview.hidden == true &&
+		opts.Preview.wrap == true &&
+		opts.Preview.cycle == true &&
 		opts.Preview.position == posDown &&
-		opts.Preview.size.percent == true &&
-		opts.Preview.size.size == 50) {
-		t.Error(opts.Preview)
+		opts.Preview.scroll == "+{1}+3-1-2/2" &&
+		opts.Preview.size.percent == false &&
+		opts.Preview.size.size == 15) {
+		t.Error(opts.Preview.size.size)
 	}
 	opts = optsFor("--preview-window=up:15:wrap:hidden")
 	if !(opts.Preview.command == "" &&
@@ -408,7 +431,76 @@ func TestPreviewOpts(t *testing.T) {
 		opts.Preview.wrap == true &&
 		opts.Preview.position == posUp &&
 		opts.Preview.size.percent == false &&
-		opts.Preview.size.size == 15+2) {
+		opts.Preview.size.size == 15) {
+		t.Error(opts.Preview)
+	}
+	opts = optsFor("--preview=foo", "--preview-window=up", "--preview-window=default:70%")
+	if !(opts.Preview.command == "foo" &&
+		opts.Preview.position == posRight &&
+		opts.Preview.size.percent == true &&
+		opts.Preview.size.size == 70) {
 		t.Error(opts.Preview)
 	}
 }
+
+func TestAdditiveExpect(t *testing.T) {
+	opts := optsFor("--expect=a", "--expect", "b", "--expect=c")
+	if len(opts.Expect) != 3 {
+		t.Error(opts.Expect)
+	}
+}
+
+func TestValidateSign(t *testing.T) {
+	testCases := []struct {
+		inputSign string
+		isValid   bool
+	}{
+		{"> ", true},
+		{"아", true},
+		{"😀", true},
+		{">>>", false},
+	}
+
+	for _, testCase := range testCases {
+		err := validateSign(testCase.inputSign, "")
+		if testCase.isValid && err != nil {
+			t.Errorf("Input sign `%s` caused error", testCase.inputSign)
+		}
+
+		if !testCase.isValid && err == nil {
+			t.Errorf("Input sign `%s` did not cause error", testCase.inputSign)
+		}
+	}
+}
+
+func TestParseSingleActionList(t *testing.T) {
+	actions, _ := parseSingleActionList("Execute@foo+bar,baz@+up+up+reload:down+down")
+	if len(actions) != 4 {
+		t.Errorf("Invalid number of actions parsed:%d", len(actions))
+	}
+	if actions[0].t != actExecute || actions[0].a != "foo+bar,baz" {
+		t.Errorf("Invalid action parsed: %v", actions[0])
+	}
+	if actions[1].t != actUp || actions[2].t != actUp {
+		t.Errorf("Invalid action parsed: %v / %v", actions[1], actions[2])
+	}
+	if actions[3].t != actReload || actions[3].a != "down+down" {
+		t.Errorf("Invalid action parsed: %v", actions[3])
+	}
+}
+
+func TestParseSingleActionListError(t *testing.T) {
+	_, err := parseSingleActionList("change-query(foobar)baz")
+	if err == nil {
+		t.Errorf("Failed to detect error")
+	}
+}
+
+func TestMaskActionContents(t *testing.T) {
+	original := ":execute((f)(o)(o)(b)(a)(r))+change-query@qu@ry@+up,x:reload:hello:world"
+	expected := ":execute                    +change-query       +up,x:reload            "
+	masked := maskActionContents(original)
+	if masked != expected {
+		t.Errorf("Not masked: %s", masked)
+	}
+}

src/pattern.go

@@ -1,6 +1,7 @@
 package fzf
 
 import (
+	"fmt"
 	"regexp"
 	"strings"
 
@@ -10,18 +11,19 @@ import (
 
 // fuzzy
 // 'exact
-// ^exact-prefix
-// exact-suffix$
-// !not-fuzzy
-// !'not-exact
-// !^not-exact-prefix
-// !not-exact-suffix$
+// ^prefix-exact
+// suffix-exact$
+// !inverse-exact
+// !'inverse-fuzzy
+// !^inverse-prefix-exact
+// !inverse-suffix-exact$
 
 type termType int
 
 const (
 	termFuzzy termType = iota
 	termExact
+	termExactBoundary
 	termPrefix
 	termSuffix
 	termEqual
@@ -32,7 +34,12 @@ type term struct {
 	inv           bool
 	text          []rune
 	caseSensitive bool
-	origText      []rune
+	normalize     bool
+}
+
+// String returns the string representation of a term.
+func (t term) String() string {
+	return fmt.Sprintf("term{typ: %d, inv: %v, text: []rune(%q), caseSensitive: %v}", t.typ, t.inv, string(t.text), t.caseSensitive)
 }
 
 type termSet []term
@@ -45,70 +52,76 @@ type Pattern struct {
 	caseSensitive bool
 	normalize     bool
 	forward       bool
+	withPos       bool
 	text          []rune
 	termSets      []termSet
+	sortable      bool
 	cacheable     bool
+	cacheKey      string
 	delimiter     Delimiter
 	nth           []Range
+	revision      revision
 	procFun       map[termType]algo.Algo
+	cache         *ChunkCache
+	denylist      map[int32]struct{}
 }
 
-var (
-	_patternCache map[string]*Pattern
-	_splitRegex   *regexp.Regexp
-	_cache        ChunkCache
-)
+var _splitRegex *regexp.Regexp
 
 func init() {
-	_splitRegex = regexp.MustCompile("\\s+")
-	clearPatternCache()
-	clearChunkCache()
-}
-
-func clearPatternCache() {
-	// We can uniquely identify the pattern for a given string since
-	// search mode and caseMode do not change while the program is running
-	_patternCache = make(map[string]*Pattern)
-}
-
-func clearChunkCache() {
-	_cache = NewChunkCache()
+	_splitRegex = regexp.MustCompile(" +")
 }
 
 // BuildPattern builds Pattern object from the given arguments
-func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case, normalize bool, forward bool,
-	cacheable bool, nth []Range, delimiter Delimiter, runes []rune) *Pattern {
+func BuildPattern(cache *ChunkCache, patternCache map[string]*Pattern, fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case, normalize bool, forward bool,
+	withPos bool, cacheable bool, nth []Range, delimiter Delimiter, revision revision, runes []rune, denylist map[int32]struct{}) *Pattern {
 
 	var asString string
 	if extended {
-		asString = strings.Trim(string(runes), " ")
+		asString = strings.TrimLeft(string(runes), " ")
+		for strings.HasSuffix(asString, " ") && !strings.HasSuffix(asString, "\\ ") {
+			asString = asString[:len(asString)-1]
+		}
 	} else {
 		asString = string(runes)
 	}
 
-	cached, found := _patternCache[asString]
+	// We can uniquely identify the pattern for a given string since
+	// search mode and caseMode do not change while the program is running
+	cached, found := patternCache[asString]
 	if found {
 		return cached
 	}
 
 	caseSensitive := true
+	sortable := true
 	termSets := []termSet{}
 
 	if extended {
 		termSets = parseTerms(fuzzy, caseMode, normalize, asString)
+		// We should not sort the result if there are only inverse search terms
+		sortable = false
 	Loop:
 		for _, termSet := range termSets {
 			for idx, term := range termSet {
+				if !term.inv {
+					sortable = true
+				}
 				// If the query contains inverse search terms or OR operators,
 				// we cannot cache the search scope
-				if !cacheable || idx > 0 || term.inv {
+				if !cacheable || idx > 0 || term.inv || fuzzy && term.typ != termFuzzy || !fuzzy && term.typ != termExact {
 					cacheable = false
-					break Loop
+					if sortable {
+						// Can't break until we see at least one non-inverse term
+						break Loop
+					}
 				}
 			}
 		}
 	} else {
 		lowerString := strings.ToLower(asString)
+		normalize = normalize &&
+			lowerString == string(algo.NormalizeRunes([]rune(lowerString)))
 		caseSensitive = caseMode == CaseRespect ||
 			caseMode == CaseSmart && lowerString != asString
 		if !caseSensitive {
@@ -123,45 +136,57 @@ func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case,
 		caseSensitive: caseSensitive,
 		normalize:     normalize,
 		forward:       forward,
+		withPos:       withPos,
 		text:          []rune(asString),
 		termSets:      termSets,
+		sortable:      sortable,
 		cacheable:     cacheable,
 		nth:           nth,
+		revision:      revision,
 		delimiter:     delimiter,
+		cache:         cache,
+		denylist:      denylist,
 		procFun:       make(map[termType]algo.Algo)}
 
+	ptr.cacheKey = ptr.buildCacheKey()
 	ptr.procFun[termFuzzy] = fuzzyAlgo
 	ptr.procFun[termEqual] = algo.EqualMatch
 	ptr.procFun[termExact] = algo.ExactMatchNaive
+	ptr.procFun[termExactBoundary] = algo.ExactMatchBoundary
 	ptr.procFun[termPrefix] = algo.PrefixMatch
 	ptr.procFun[termSuffix] = algo.SuffixMatch
 
-	_patternCache[asString] = ptr
+	patternCache[asString] = ptr
 	return ptr
 }
 
 func parseTerms(fuzzy bool, caseMode Case, normalize bool, str string) []termSet {
+	str = strings.ReplaceAll(str, "\\ ", "\t")
 	tokens := _splitRegex.Split(str, -1)
 	sets := []termSet{}
 	set := termSet{}
 	switchSet := false
+	afterBar := false
 	for _, token := range tokens {
-		typ, inv, text := termFuzzy, false, token
+		typ, inv, text := termFuzzy, false, strings.ReplaceAll(token, "\t", " ")
 		lowerText := strings.ToLower(text)
 		caseSensitive := caseMode == CaseRespect ||
 			caseMode == CaseSmart && text != lowerText
+		normalizeTerm := normalize &&
+			lowerText == string(algo.NormalizeRunes([]rune(lowerText)))
 		if !caseSensitive {
 			text = lowerText
 		}
-		origText := []rune(text)
 		if !fuzzy {
 			typ = termExact
 		}
 
-		if text == "|" {
+		if len(set) > 0 && !afterBar && text == "|" {
 			switchSet = false
+			afterBar = true
 			continue
 		}
+		afterBar = false
 
 		if strings.HasPrefix(text, "!") {
 			inv = true
@@ -169,26 +194,29 @@ func parseTerms(fuzzy bool, caseMode Case, normalize bool, str string) []termSet
 			text = text[1:]
 		}
 
-		if strings.HasPrefix(text, "'") {
+		if text != "$" && strings.HasSuffix(text, "$") {
+			typ = termSuffix
+			text = text[:len(text)-1]
+		}
+
+		if len(text) > 2 && strings.HasPrefix(text, "'") && strings.HasSuffix(text, "'") {
+			typ = termExactBoundary
+			text = text[1 : len(text)-1]
+		} else if strings.HasPrefix(text, "'") {
 			// Flip exactness
 			if fuzzy && !inv {
 				typ = termExact
-				text = text[1:]
 			} else {
 				typ = termFuzzy
-				text = text[1:]
 			}
+			text = text[1:]
 		} else if strings.HasPrefix(text, "^") {
-			if strings.HasSuffix(text, "$") {
+			if typ == termSuffix {
 				typ = termEqual
-				text = text[1 : len(text)-1]
 			} else {
 				typ = termPrefix
-				text = text[1:]
 			}
-		} else if strings.HasSuffix(text, "$") {
-			typ = termSuffix
-			text = text[:len(text)-1]
+			text = text[1:]
 		}
 
 		if len(text) > 0 {
@@ -197,7 +225,7 @@ func parseTerms(fuzzy bool, caseMode Case, normalize bool, str string) []termSet
 				set = termSet{}
 			}
 			textRunes := []rune(text)
-			if normalize {
+			if normalizeTerm {
 				textRunes = algo.NormalizeRunes(textRunes)
 			}
 			set = append(set, term{
@@ -205,7 +233,7 @@ func parseTerms(fuzzy bool, caseMode Case, normalize bool, str string) []termSet
 				inv:           inv,
 				text:          textRunes,
 				caseSensitive: caseSensitive,
-				origText:      origText})
+				normalize:     normalizeTerm})
 			switchSet = true
 		}
 	}
@@ -217,6 +245,9 @@ func parseTerms(fuzzy bool, caseMode Case, normalize bool, str string) []termSet
 
 // IsEmpty returns true if the pattern is effectively empty
 func (p *Pattern) IsEmpty() bool {
+	if len(p.denylist) > 0 {
+		return false
+	}
 	if !p.extended {
 		return len(p.text) == 0
 	}
@@ -228,68 +259,82 @@ func (p *Pattern) AsString() string {
 	return string(p.text)
 }
 
-// CacheKey is used to build string to be used as the key of result cache
-func (p *Pattern) CacheKey() string {
+func (p *Pattern) buildCacheKey() string {
 	if !p.extended {
 		return p.AsString()
 	}
 	cacheableTerms := []string{}
 	for _, termSet := range p.termSets {
 		if len(termSet) == 1 && !termSet[0].inv && (p.fuzzy || termSet[0].typ == termExact) {
-			cacheableTerms = append(cacheableTerms, string(termSet[0].origText))
+			cacheableTerms = append(cacheableTerms, string(termSet[0].text))
 		}
 	}
-	return strings.Join(cacheableTerms, " ")
+	return strings.Join(cacheableTerms, "\t")
+}
+
+// CacheKey is used to build string to be used as the key of result cache
+func (p *Pattern) CacheKey() string {
+	return p.cacheKey
 }
 
 // Match returns the list of matches Items in the given Chunk
-func (p *Pattern) Match(chunk *Chunk, slab *util.Slab) []*Result {
+func (p *Pattern) Match(chunk *Chunk, slab *util.Slab) []Result {
 	// ChunkCache: Exact match
 	cacheKey := p.CacheKey()
 	if p.cacheable {
-		if cached, found := _cache.Find(chunk, cacheKey); found {
+		if cached := p.cache.Lookup(chunk, cacheKey); cached != nil {
 			return cached
 		}
 	}
 
 	// Prefix/suffix cache
-	var space []*Result
-Loop:
-	for idx := 1; idx < len(cacheKey); idx++ {
-		// [---------| ] | [ |---------]
-		// [--------|  ] | [  |--------]
-		// [-------|   ] | [   |-------]
-		prefix := cacheKey[:len(cacheKey)-idx]
-		suffix := cacheKey[idx:]
-		for _, substr := range [2]*string{&prefix, &suffix} {
-			if cached, found := _cache.Find(chunk, *substr); found {
-				space = cached
-				break Loop
-			}
-		}
-	}
+	space := p.cache.Search(chunk, cacheKey)
 
 	matches := p.matchChunk(chunk, space, slab)
 
 	if p.cacheable {
-		_cache.Add(chunk, cacheKey, matches)
+		p.cache.Add(chunk, cacheKey, matches)
 	}
 	return matches
 }
 
-func (p *Pattern) matchChunk(chunk *Chunk, space []*Result, slab *util.Slab) []*Result {
-	matches := []*Result{}
+func (p *Pattern) matchChunk(chunk *Chunk, space []Result, slab *util.Slab) []Result {
+	matches := []Result{}
+
+	if len(p.denylist) == 0 {
+		// Huge code duplication for minimizing unnecessary map lookups
+		if space == nil {
+			for idx := 0; idx < chunk.count; idx++ {
+				if match, _, _ := p.MatchItem(&chunk.items[idx], p.withPos, slab); match != nil {
+					matches = append(matches, *match)
+				}
+			}
+		} else {
+			for _, result := range space {
+				if match, _, _ := p.MatchItem(result.item, p.withPos, slab); match != nil {
+					matches = append(matches, *match)
+				}
+			}
+		}
+		return matches
+	}
 
 	if space == nil {
-		for _, item := range *chunk {
-			if match, _, _ := p.MatchItem(item, false, slab); match != nil {
-				matches = append(matches, match)
+		for idx := 0; idx < chunk.count; idx++ {
+			if _, prs := p.denylist[chunk.items[idx].Index()]; prs {
+				continue
+			}
+			if match, _, _ := p.MatchItem(&chunk.items[idx], p.withPos, slab); match != nil {
+				matches = append(matches, *match)
 			}
 		}
 	} else {
 		for _, result := range space {
-			if match, _, _ := p.MatchItem(result.item, false, slab); match != nil {
-				matches = append(matches, match)
+			if _, prs := p.denylist[result.item.Index()]; prs {
+				continue
+			}
+			if match, _, _ := p.MatchItem(result.item, p.withPos, slab); match != nil {
+				matches = append(matches, *match)
 			}
 		}
 	}
@@ -299,32 +344,43 @@ func (p *Pattern) matchChunk(chunk *Chunk, space []*Result, slab *util.Slab) []*
 // MatchItem returns true if the Item is a match
 func (p *Pattern) MatchItem(item *Item, withPos bool, slab *util.Slab) (*Result, []Offset, *[]int) {
 	if p.extended {
-		if offsets, bonus, trimLen, pos := p.extendedMatch(item, withPos, slab); len(offsets) == len(p.termSets) {
-			return buildResult(item, offsets, bonus, trimLen), offsets, pos
+		if offsets, bonus, pos := p.extendedMatch(item, withPos, slab); len(offsets) == len(p.termSets) {
+			result := buildResult(item, offsets, bonus)
+			return &result, offsets, pos
 		}
 		return nil, nil, nil
 	}
-	offset, bonus, trimLen, pos := p.basicMatch(item, withPos, slab)
+	offset, bonus, pos := p.basicMatch(item, withPos, slab)
 	if sidx := offset[0]; sidx >= 0 {
 		offsets := []Offset{offset}
-		return buildResult(item, offsets, bonus, trimLen), offsets, pos
+		result := buildResult(item, offsets, bonus)
+		return &result, offsets, pos
 	}
 	return nil, nil, nil
 }
 
-func (p *Pattern) basicMatch(item *Item, withPos bool, slab *util.Slab) (Offset, int, int, *[]int) {
-	input := p.prepareInput(item)
+func (p *Pattern) basicMatch(item *Item, withPos bool, slab *util.Slab) (Offset, int, *[]int) {
+	var input []Token
+	if len(p.nth) == 0 {
+		input = []Token{{text: &item.text, prefixLength: 0}}
+	} else {
+		input = p.transformInput(item)
+	}
 	if p.fuzzy {
 		return p.iter(p.fuzzyAlgo, input, p.caseSensitive, p.normalize, p.forward, p.text, withPos, slab)
 	}
 	return p.iter(algo.ExactMatchNaive, input, p.caseSensitive, p.normalize, p.forward, p.text, withPos, slab)
 }
 
-func (p *Pattern) extendedMatch(item *Item, withPos bool, slab *util.Slab) ([]Offset, int, int, *[]int) {
-	input := p.prepareInput(item)
+func (p *Pattern) extendedMatch(item *Item, withPos bool, slab *util.Slab) ([]Offset, int, *[]int) {
+	var input []Token
+	if len(p.nth) == 0 {
+		input = []Token{{text: &item.text, prefixLength: 0}}
+	} else {
+		input = p.transformInput(item)
+	}
 	offsets := []Offset{}
 	var totalScore int
-	var totalTrimLen int
 	var allPos *[]int
 	if withPos {
 		allPos = &[]int{}
@@ -332,16 +388,15 @@ func (p *Pattern) extendedMatch(item *Item, withPos bool, slab *util.Slab) ([]Of
 	for _, termSet := range p.termSets {
 		var offset Offset
 		var currentScore int
-		var trimLen int
 		matched := false
 		for _, term := range termSet {
 			pfun := p.procFun[term.typ]
-			off, score, tLen, pos := p.iter(pfun, input, term.caseSensitive, p.normalize, p.forward, term.text, withPos, slab)
+			off, score, pos := p.iter(pfun, input, term.caseSensitive, term.normalize, p.forward, term.text, withPos, slab)
 			if sidx := off[0]; sidx >= 0 {
 				if term.inv {
 					continue
 				}
-				offset, currentScore, trimLen = off, score, tLen
+				offset, currentScore = off, score
 				matched = true
 				if withPos {
 					if pos != nil {
@@ -354,7 +409,7 @@ func (p *Pattern) extendedMatch(item *Item, withPos bool, slab *util.Slab) ([]Of
 				}
 				break
 			} else if term.inv {
-				offset, currentScore, trimLen = Offset{0, 0}, 0, 0
+				offset, currentScore = Offset{0, 0}, 0
 				matched = true
 				continue
 			}
@@ -362,31 +417,35 @@ func (p *Pattern) extendedMatch(item *Item, withPos bool, slab *util.Slab) ([]Of
 		if matched {
 			offsets = append(offsets, offset)
 			totalScore += currentScore
-			totalTrimLen += trimLen
 		}
 	}
-	return offsets, totalScore, totalTrimLen, allPos
+	return offsets, totalScore, allPos
 }
 
-func (p *Pattern) prepareInput(item *Item) []Token {
+func (p *Pattern) transformInput(item *Item) []Token {
 	if item.transformed != nil {
-		return item.transformed
+		transformed := *item.transformed
+		if transformed.revision == p.revision {
+			return transformed.tokens
+		}
 	}
 
-	var ret []Token
-	if len(p.nth) == 0 {
-		ret = []Token{Token{text: &item.text, prefixLength: 0, trimLength: int32(item.text.TrimLength())}}
-	} else {
-		tokens := Tokenize(item.text, p.delimiter)
-		ret = Transform(tokens, p.nth)
+	tokens := Tokenize(item.text.ToString(), p.delimiter)
+	ret := Transform(tokens, p.nth)
+	// Strip the last delimiter to allow suffix match
+	if len(ret) > 0 && !p.delimiter.IsAwk() {
+		chars := ret[len(ret)-1].text
+		stripped := StripLastDelimiter(chars.ToString(), p.delimiter)
+		newChars := util.ToChars(stringBytes(stripped))
+		ret[len(ret)-1].text = &newChars
 	}
-	item.transformed = ret
+	item.transformed = &transformed{p.revision, ret}
 	return ret
 }
 
-func (p *Pattern) iter(pfun algo.Algo, tokens []Token, caseSensitive bool, normalize bool, forward bool, pattern []rune, withPos bool, slab *util.Slab) (Offset, int, int, *[]int) {
+func (p *Pattern) iter(pfun algo.Algo, tokens []Token, caseSensitive bool, normalize bool, forward bool, pattern []rune, withPos bool, slab *util.Slab) (Offset, int, *[]int) {
 	for _, part := range tokens {
-		if res, pos := pfun(caseSensitive, normalize, forward, *part.text, pattern, withPos, slab); res.Start >= 0 {
+		if res, pos := pfun(caseSensitive, normalize, forward, part.text, pattern, withPos, slab); res.Start >= 0 {
 			sidx := int32(res.Start) + part.prefixLength
 			eidx := int32(res.End) + part.prefixLength
 			if pos != nil {
@@ -394,8 +453,8 @@ func (p *Pattern) iter(pfun algo.Algo, tokens []Token, caseSensitive bool, norma
 					(*pos)[idx] += int(part.prefixLength)
 				}
 			}
-			return Offset{sidx, eidx}, res.Score, int(part.trimLength), pos
+			return Offset{sidx, eidx}, res.Score, pos
 		}
 	}
-	return Offset{-1, -1}, 0, -1, nil
+	return Offset{-1, -1}, 0, nil
 }

src/pattern_test.go

@@ -16,7 +16,7 @@ func init() {
 
 func TestParseTermsExtended(t *testing.T) {
 	terms := parseTerms(true, CaseSmart, false,
-		"| aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$ | ^iii$ ^xxx | 'yyy | | zzz$ | !ZZZ |")
+		"aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$ | ^iii$ ^xxx | 'yyy | zzz$ | !ZZZ |")
 	if len(terms) != 9 ||
 		terms[0][0].typ != termFuzzy || terms[0][0].inv ||
 		terms[1][0].typ != termExact || terms[1][0].inv ||
@@ -31,20 +31,12 @@ func TestParseTermsExtended(t *testing.T) {
 		terms[8][1].typ != termExact || terms[8][1].inv ||
 		terms[8][2].typ != termSuffix || terms[8][2].inv ||
 		terms[8][3].typ != termExact || !terms[8][3].inv {
-		t.Errorf("%s", terms)
+		t.Errorf("%v", terms)
 	}
-	for idx, termSet := range terms[:8] {
+	for _, termSet := range terms[:8] {
 		term := termSet[0]
 		if len(term.text) != 3 {
-			t.Errorf("%s", term)
-		}
-		if idx > 0 && len(term.origText) != 4+idx/5 {
-			t.Errorf("%s", term)
-		}
-	}
-	for _, term := range terms[8] {
-		if len(term.origText) != 4 {
-			t.Errorf("%s", term)
+			t.Errorf("%v", term)
 		}
 	}
 }
@@ -61,26 +53,32 @@ func TestParseTermsExtendedExact(t *testing.T) {
 		terms[5][0].typ != termFuzzy || !terms[5][0].inv || len(terms[5][0].text) != 3 ||
 		terms[6][0].typ != termPrefix || !terms[6][0].inv || len(terms[6][0].text) != 3 ||
 		terms[7][0].typ != termSuffix || !terms[7][0].inv || len(terms[7][0].text) != 3 {
-		t.Errorf("%s", terms)
+		t.Errorf("%v", terms)
 	}
 }
 
 func TestParseTermsEmpty(t *testing.T) {
-	terms := parseTerms(true, CaseSmart, false, "' $ ^ !' !^ !$")
+	terms := parseTerms(true, CaseSmart, false, "' ^ !' !^")
 	if len(terms) != 0 {
-		t.Errorf("%s", terms)
+		t.Errorf("%v", terms)
 	}
 }
 
+func buildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case, normalize bool, forward bool,
+	withPos bool, cacheable bool, nth []Range, delimiter Delimiter, runes []rune) *Pattern {
+	return BuildPattern(NewChunkCache(), make(map[string]*Pattern),
+		fuzzy, fuzzyAlgo, extended, caseMode, normalize, forward,
+		withPos, cacheable, nth, delimiter, revision{}, runes, nil)
+}
+
 func TestExact(t *testing.T) {
-	defer clearPatternCache()
-	clearPatternCache()
-	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, true,
+	pattern := buildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true,
 		[]Range{}, Delimiter{}, []rune("'abc"))
+	chars := util.ToChars([]byte("aabbcc abc"))
 	res, pos := algo.ExactMatchNaive(
-		pattern.caseSensitive, pattern.normalize, pattern.forward, util.RunesToChars([]rune("aabbcc abc")), pattern.termSets[0][0].text, true, nil)
+		pattern.caseSensitive, pattern.normalize, pattern.forward, &chars, pattern.termSets[0][0].text, true, nil)
 	if res.Start != 7 || res.End != 10 {
-		t.Errorf("%s / %d / %d", pattern.termSets, res.Start, res.End)
+		t.Errorf("%v / %d / %d", pattern.termSets, res.Start, res.End)
 	}
 	if pos != nil {
 		t.Errorf("pos is expected to be nil")
@@ -88,15 +86,14 @@ func TestExact(t *testing.T) {
 }
 
 func TestEqual(t *testing.T) {
-	defer clearPatternCache()
-	clearPatternCache()
-	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("^AbC$"))
+	pattern := buildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("^AbC$"))
 
 	match := func(str string, sidxExpected int, eidxExpected int) {
+		chars := util.ToChars([]byte(str))
 		res, pos := algo.EqualMatch(
-			pattern.caseSensitive, pattern.normalize, pattern.forward, util.RunesToChars([]rune(str)), pattern.termSets[0][0].text, true, nil)
+			pattern.caseSensitive, pattern.normalize, pattern.forward, &chars, pattern.termSets[0][0].text, true, nil)
 		if res.Start != sidxExpected || res.End != eidxExpected {
-			t.Errorf("%s / %d / %d", pattern.termSets, res.Start, res.End)
+			t.Errorf("%v / %d / %d", pattern.termSets, res.Start, res.End)
 		}
 		if pos != nil {
 			t.Errorf("pos is expected to be nil")
@@ -104,22 +101,18 @@ func TestEqual(t *testing.T) {
 	}
 	match("ABC", -1, -1)
 	match("AbC", 0, 3)
+	match("AbC  ", 0, 3)
+	match(" AbC ", 1, 4)
+	match("  AbC", 2, 5)
 }
 
 func TestCaseSensitivity(t *testing.T) {
-	defer clearPatternCache()
-	clearPatternCache()
-	pat1 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("abc"))
-	clearPatternCache()
-	pat2 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("Abc"))
-	clearPatternCache()
-	pat3 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, true, []Range{}, Delimiter{}, []rune("abc"))
-	clearPatternCache()
-	pat4 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, true, []Range{}, Delimiter{}, []rune("Abc"))
-	clearPatternCache()
-	pat5 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, true, []Range{}, Delimiter{}, []rune("abc"))
-	clearPatternCache()
-	pat6 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat1 := buildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat2 := buildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat3 := buildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat4 := buildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat5 := buildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat6 := buildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
 
 	if string(pat1.text) != "abc" || pat1.caseSensitive != false ||
 		string(pat2.text) != "Abc" || pat2.caseSensitive != true ||
@@ -132,31 +125,30 @@ func TestCaseSensitivity(t *testing.T) {
 }
 
 func TestOrigTextAndTransformed(t *testing.T) {
-	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("jg"))
-	tokens := Tokenize(util.RunesToChars([]rune("junegunn")), Delimiter{})
-	trans := Transform(tokens, []Range{Range{1, 1}})
+	pattern := buildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("jg"))
+	tokens := Tokenize("junegunn", Delimiter{})
+	trans := Transform(tokens, []Range{{1, 1}})
 
 	origBytes := []byte("junegunn.choi")
 	for _, extended := range []bool{false, true} {
-		chunk := Chunk{
-			&Item{
-				text:        util.RunesToChars([]rune("junegunn")),
-				origText:    &origBytes,
-				transformed: trans},
-		}
+		chunk := Chunk{count: 1}
+		chunk.items[0] = Item{
+			text:        util.ToChars([]byte("junegunn")),
+			origText:    &origBytes,
+			transformed: &transformed{pattern.revision, trans}}
 		pattern.extended = extended
 		matches := pattern.matchChunk(&chunk, nil, slab) // No cache
 		if !(matches[0].item.text.ToString() == "junegunn" &&
 			string(*matches[0].item.origText) == "junegunn.choi" &&
-			reflect.DeepEqual(matches[0].item.transformed, trans)) {
+			reflect.DeepEqual((*matches[0].item.transformed).tokens, trans)) {
 			t.Error("Invalid match result", matches)
 		}
 
-		match, offsets, pos := pattern.MatchItem(chunk[0], true, slab)
+		match, offsets, pos := pattern.MatchItem(&chunk.items[0], true, slab)
 		if !(match.item.text.ToString() == "junegunn" &&
 			string(*match.item.origText) == "junegunn.choi" &&
 			offsets[0][0] == 0 && offsets[0][1] == 5 &&
-			reflect.DeepEqual(match.item.transformed, trans)) {
+			reflect.DeepEqual((*match.item.transformed).tokens, trans)) {
 			t.Error("Invalid match result", match, offsets, extended)
 		}
 		if !((*pos)[0] == 4 && (*pos)[1] == 0) {
@@ -167,22 +159,43 @@ func TestOrigTextAndTransformed(t *testing.T) {
 
 func TestCacheKey(t *testing.T) {
 	test := func(extended bool, patStr string, expected string, cacheable bool) {
-		pat := BuildPattern(true, algo.FuzzyMatchV2, extended, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune(patStr))
+		pat := buildPattern(true, algo.FuzzyMatchV2, extended, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune(patStr))
 		if pat.CacheKey() != expected {
 			t.Errorf("Expected: %s, actual: %s", expected, pat.CacheKey())
 		}
 		if pat.cacheable != cacheable {
-			t.Errorf("Expected: %s, actual: %s (%s)", cacheable, pat.cacheable, patStr)
+			t.Errorf("Expected: %t, actual: %t (%s)", cacheable, pat.cacheable, patStr)
 		}
-		clearPatternCache()
 	}
 	test(false, "foo !bar", "foo !bar", true)
 	test(false, "foo | bar !baz", "foo | bar !baz", true)
-	test(true, "foo  bar  baz", "foo bar baz", true)
+	test(true, "foo  bar  baz", "foo\tbar\tbaz", true)
 	test(true, "foo !bar", "foo", false)
-	test(true, "foo !bar   baz", "foo baz", false)
+	test(true, "foo !bar   baz", "foo\tbaz", false)
 	test(true, "foo | bar baz", "baz", false)
 	test(true, "foo | bar | baz", "", false)
 	test(true, "foo | bar !baz", "", false)
-	test(true, "| | | foo", "foo", true)
+	test(true, "| | foo", "", false)
+	test(true, "| | | foo", "foo", false)
+}
+
+func TestCacheable(t *testing.T) {
+	test := func(fuzzy bool, str string, expected string, cacheable bool) {
+		pat := buildPattern(fuzzy, algo.FuzzyMatchV2, true, CaseSmart, true, true, false, true, []Range{}, Delimiter{}, []rune(str))
+		if pat.CacheKey() != expected {
+			t.Errorf("Expected: %s, actual: %s", expected, pat.CacheKey())
+		}
+		if cacheable != pat.cacheable {
+			t.Errorf("Invalid Pattern.cacheable for \"%s\": %v (expected: %v)", str, pat.cacheable, cacheable)
+		}
+	}
+	test(true, "foo bar", "foo\tbar", true)
+	test(true, "foo 'bar", "foo\tbar", false)
+	test(true, "foo !bar", "foo", false)
+
+	test(false, "foo bar", "foo\tbar", true)
+	test(false, "foo 'bar", "foo", false)
+	test(false, "foo '", "foo", true)
+	test(false, "foo 'bar", "foo", false)
+	test(false, "foo !bar", "foo", false)
 }

src/protector/protector.go

@@ -0,0 +1,6 @@
+//go:build !openbsd
+
+package protector
+
+// Protect calls OS specific protections like pledge on OpenBSD
+func Protect() {}

src/protector/protector_openbsd.go

@@ -0,0 +1,10 @@
+//go:build openbsd
+
+package protector
+
+import "golang.org/x/sys/unix"
+
+// Protect calls OS specific protections like pledge on OpenBSD
+func Protect() {
+	unix.PledgePromises("stdio dpath wpath rpath tty proc exec inet tmppath")
+}

src/proxy.go

@@ -0,0 +1,161 @@
+package fzf
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"os/signal"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/junegunn/fzf/src/tui"
+	"github.com/junegunn/fzf/src/util"
+)
+
+const becomeSuffix = ".become"
+
+func escapeSingleQuote(str string) string {
+	return "'" + strings.ReplaceAll(str, "'", "'\\''") + "'"
+}
+
+func fifo(name string) (string, error) {
+	ns := time.Now().UnixNano()
+	output := filepath.Join(os.TempDir(), fmt.Sprintf("fzf-%s-%d", name, ns))
+	output, err := mkfifo(output, 0600)
+	if err != nil {
+		return output, err
+	}
+	return output, nil
+}
+
+func runProxy(commandPrefix string, cmdBuilder func(temp string, needBash bool) (*exec.Cmd, error), opts *Options, withExports bool) (int, error) {
+	output, err := fifo("proxy-output")
+	if err != nil {
+		return ExitError, err
+	}
+	defer os.Remove(output)
+
+	// Take the output
+	go func() {
+		withOutputPipe(output, func(outputFile io.ReadCloser) {
+			if opts.Output == nil {
+				io.Copy(os.Stdout, outputFile)
+			} else {
+				reader := bufio.NewReader(outputFile)
+				sep := opts.PrintSep[0]
+				for {
+					item, err := reader.ReadString(sep)
+					if err != nil {
+						break
+					}
+					opts.Output <- item
+				}
+			}
+		})
+	}()
+
+	var command, input string
+	commandPrefix += ` --no-force-tty-in --proxy-script "$0"`
+	if opts.Input == nil && (opts.ForceTtyIn || util.IsTty(os.Stdin)) {
+		command = fmt.Sprintf(`%s > %q`, commandPrefix, output)
+	} else {
+		input, err = fifo("proxy-input")
+		if err != nil {
+			return ExitError, err
+		}
+		defer os.Remove(input)
+
+		go func() {
+			withInputPipe(input, func(inputFile io.WriteCloser) {
+				if opts.Input == nil {
+					io.Copy(inputFile, os.Stdin)
+				} else {
+					for item := range opts.Input {
+						fmt.Fprint(inputFile, item+opts.PrintSep)
+					}
+				}
+			})
+		}()
+
+		if withExports {
+			command = fmt.Sprintf(`%s < %q > %q`, commandPrefix, input, output)
+		} else {
+			// For mintty: cannot directly read named pipe from Go code
+			command = fmt.Sprintf(`command cat %q | %s > %q`, input, commandPrefix, output)
+		}
+	}
+
+	// * Write the command to a temporary file and run it with sh to ensure POSIX compliance.
+	// * Nullify FZF_DEFAULT_* variables as tmux popup may inject them even when undefined.
+	exports := []string{"FZF_DEFAULT_COMMAND=", "FZF_DEFAULT_OPTS=", "FZF_DEFAULT_OPTS_FILE="}
+	needBash := false
+	if withExports {
+		validIdentifier := regexp.MustCompile(`^[a-zA-Z_][a-zA-Z0-9_]*$`)
+		for _, pairStr := range os.Environ() {
+			pair := strings.SplitN(pairStr, "=", 2)
+			if validIdentifier.MatchString(pair[0]) {
+				exports = append(exports, fmt.Sprintf("export %s=%s", pair[0], escapeSingleQuote(pair[1])))
+			} else if strings.HasPrefix(pair[0], "BASH_FUNC_") && strings.HasSuffix(pair[0], "%%") {
+				name := pair[0][10 : len(pair[0])-2]
+				exports = append(exports, name+pair[1])
+				exports = append(exports, "export -f "+name)
+				needBash = true
+			}
+		}
+	}
+	temp := WriteTemporaryFile(append(exports, command), "\n")
+	defer os.Remove(temp)
+
+	cmd, err := cmdBuilder(temp, needBash)
+	if err != nil {
+		return ExitError, err
+	}
+	cmd.Stderr = os.Stderr
+	intChan := make(chan os.Signal, 1)
+	defer close(intChan)
+	go func() {
+		if sig, valid := <-intChan; valid {
+			cmd.Process.Signal(sig)
+		}
+	}()
+	signal.Notify(intChan, os.Interrupt)
+	if err := cmd.Run(); err != nil {
+		if exitError, ok := err.(*exec.ExitError); ok {
+			code := exitError.ExitCode()
+			if code == ExitBecome {
+				becomeFile := temp + becomeSuffix
+				data, err := os.ReadFile(becomeFile)
+				os.Remove(becomeFile)
+				if err != nil {
+					return ExitError, err
+				}
+				elems := strings.Split(string(data), "\x00")
+				if len(elems) < 1 {
+					return ExitError, errors.New("invalid become command")
+				}
+				command := elems[0]
+				env := []string{}
+				if len(elems) > 1 {
+					env = elems[1:]
+				}
+				executor := util.NewExecutor(opts.WithShell)
+				ttyin, err := tui.TtyIn(opts.TtyDefault)
+				if err != nil {
+					return ExitError, err
+				}
+				os.Remove(temp)
+				os.Remove(input)
+				os.Remove(output)
+				executor.Become(ttyin, env, command)
+			}
+			return code, err
+		}
+	}
+
+	return ExitOk, nil
+}

src/proxy_unix.go

@@ -0,0 +1,41 @@
+//go:build !windows
+
+package fzf
+
+import (
+	"io"
+	"os"
+
+	"golang.org/x/sys/unix"
+)
+
+func sh(bash bool) (string, error) {
+	if bash {
+		return "bash", nil
+	}
+	return "sh", nil
+}
+
+func mkfifo(path string, mode uint32) (string, error) {
+	return path, unix.Mkfifo(path, mode)
+}
+
+func withOutputPipe(output string, task func(io.ReadCloser)) error {
+	outputFile, err := os.OpenFile(output, os.O_RDONLY, 0)
+	if err != nil {
+		return err
+	}
+	task(outputFile)
+	outputFile.Close()
+	return nil
+}
+
+func withInputPipe(input string, task func(io.WriteCloser)) error {
+	inputFile, err := os.OpenFile(input, os.O_WRONLY, 0)
+	if err != nil {
+		return err
+	}
+	task(inputFile)
+	inputFile.Close()
+	return nil
+}

src/proxy_windows.go

@@ -0,0 +1,85 @@
+//go:build windows
+
+package fzf
+
+import (
+	"fmt"
+	"io"
+	"os/exec"
+	"strconv"
+	"strings"
+	"sync/atomic"
+)
+
+var shPath atomic.Value
+
+func sh(bash bool) (string, error) {
+	if cached := shPath.Load(); cached != nil {
+		return cached.(string), nil
+	}
+
+	name := "sh"
+	if bash {
+		name = "bash"
+	}
+	cmd := exec.Command("cygpath", "-w", "/usr/bin/"+name)
+	bytes, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+
+	sh := strings.TrimSpace(string(bytes))
+	shPath.Store(sh)
+	return sh, nil
+}
+
+func mkfifo(path string, mode uint32) (string, error) {
+	m := strconv.FormatUint(uint64(mode), 8)
+	sh, err := sh(false)
+	if err != nil {
+		return path, err
+	}
+	cmd := exec.Command(sh, "-c", fmt.Sprintf(`command mkfifo -m %s %q`, m, path))
+	if err := cmd.Run(); err != nil {
+		return path, err
+	}
+	return path + ".lnk", nil
+}
+
+func withOutputPipe(output string, task func(io.ReadCloser)) error {
+	sh, err := sh(false)
+	if err != nil {
+		return err
+	}
+	cmd := exec.Command(sh, "-c", fmt.Sprintf(`command cat %q`, output))
+	outputFile, err := cmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+
+	task(outputFile)
+	cmd.Wait()
+	return nil
+}
+
+func withInputPipe(input string, task func(io.WriteCloser)) error {
+	sh, err := sh(false)
+	if err != nil {
+		return err
+	}
+	cmd := exec.Command(sh, "-c", fmt.Sprintf(`command cat - > %q`, input))
+	inputFile, err := cmd.StdinPipe()
+	if err != nil {
+		return err
+	}
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+	task(inputFile)
+	inputFile.Close()
+	cmd.Wait()
+	return nil
+}

src/reader.go

@@ -1,78 +1,376 @@
 package fzf
 
 import (
-	"bufio"
+	"bytes"
+	"context"
 	"io"
+	"io/fs"
 	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
 
+	"github.com/charlievieth/fastwalk"
 	"github.com/junegunn/fzf/src/util"
 )
 
 // Reader reads from command or standard input
 type Reader struct {
 	pusher   func([]byte) bool
+	executor *util.Executor
 	eventBox *util.EventBox
 	delimNil bool
+	event    int32
+	finChan  chan bool
+	mutex    sync.Mutex
+	killed   bool
+	termFunc func()
+	command  *string
+	wait     bool
+}
+
+// NewReader returns new Reader object
+func NewReader(pusher func([]byte) bool, eventBox *util.EventBox, executor *util.Executor, delimNil bool, wait bool) *Reader {
+	return &Reader{
+		pusher,
+		executor,
+		eventBox,
+		delimNil,
+		int32(EvtReady),
+		make(chan bool, 1),
+		sync.Mutex{},
+		false,
+		func() { os.Stdin.Close() },
+		nil,
+		wait}
+}
+
+func (r *Reader) startEventPoller() {
+	go func() {
+		ptr := &r.event
+		pollInterval := readerPollIntervalMin
+		for {
+			if atomic.CompareAndSwapInt32(ptr, int32(EvtReadNew), int32(EvtReady)) {
+				r.eventBox.Set(EvtReadNew, (*string)(nil))
+				pollInterval = readerPollIntervalMin
+			} else if atomic.LoadInt32(ptr) == int32(EvtReadFin) {
+				if r.wait {
+					r.finChan <- true
+				}
+				return
+			} else {
+				pollInterval += readerPollIntervalStep
+				if pollInterval > readerPollIntervalMax {
+					pollInterval = readerPollIntervalMax
+				}
+			}
+			time.Sleep(pollInterval)
+		}
+	}()
+}
+
+func (r *Reader) fin(success bool) {
+	atomic.StoreInt32(&r.event, int32(EvtReadFin))
+	if r.wait {
+		<-r.finChan
+	}
+
+	r.mutex.Lock()
+	ret := r.command
+	if success || r.killed {
+		ret = nil
+	}
+	r.mutex.Unlock()
+
+	r.eventBox.Set(EvtReadFin, ret)
+}
+
+func (r *Reader) terminate() {
+	r.mutex.Lock()
+	r.killed = true
+	if r.termFunc != nil {
+		r.termFunc()
+		r.termFunc = nil
+	}
+	r.mutex.Unlock()
+}
+
+func (r *Reader) restart(command commandSpec, environ []string, readyChan chan bool) {
+	r.event = int32(EvtReady)
+	r.startEventPoller()
+	success := r.readFromCommand(command.command, environ, func() {
+		readyChan <- true
+	})
+	r.fin(success)
+	removeFiles(command.tempFiles)
+}
+
+func (r *Reader) readChannel(inputChan chan string) bool {
+	for {
+		item, more := <-inputChan
+		if !more {
+			break
+		}
+		if r.pusher([]byte(item)) {
+			atomic.StoreInt32(&r.event, int32(EvtReadNew))
+		}
+	}
+	return true
 }
 
 // ReadSource reads data from the default command or from standard input
-func (r *Reader) ReadSource() {
-	if util.IsTty() {
+func (r *Reader) ReadSource(inputChan chan string, roots []string, opts walkerOpts, ignores []string, initCmd string, initEnv []string, readyChan chan bool) {
+	r.startEventPoller()
+	var success bool
+	signalReady := func() {
+		if readyChan != nil {
+			readyChan <- true
+		}
+	}
+	if inputChan != nil {
+		signalReady()
+		success = r.readChannel(inputChan)
+	} else if len(initCmd) > 0 {
+		success = r.readFromCommand(initCmd, initEnv, signalReady)
+	} else if util.IsTty(os.Stdin) {
 		cmd := os.Getenv("FZF_DEFAULT_COMMAND")
 		if len(cmd) == 0 {
-			cmd = defaultCommand
+			signalReady()
+			success = r.readFiles(roots, opts, ignores)
+		} else {
+			success = r.readFromCommand(cmd, initEnv, signalReady)
 		}
-		r.readFromCommand(cmd)
 	} else {
-		r.readFromStdin()
+		signalReady()
+		success = r.readFromStdin()
 	}
-	r.eventBox.Set(EvtReadFin, nil)
+	r.fin(success)
 }
 
 func (r *Reader) feed(src io.Reader) {
+	/*
+		readerSlabSize, ae := strconv.Atoi(os.Getenv("SLAB_KB"))
+		if ae != nil {
+			readerSlabSize = 128 * 1024
+		} else {
+			readerSlabSize *= 1024
+		}
+		readerBufferSize, be := strconv.Atoi(os.Getenv("BUF_KB"))
+		if be != nil {
+			readerBufferSize = 64 * 1024
+		} else {
+			readerBufferSize *= 1024
+		}
+	*/
+
 	delim := byte('\n')
+	trimCR := util.IsWindows()
 	if r.delimNil {
 		delim = '\000'
+		trimCR = false
 	}
-	reader := bufio.NewReaderSize(src, readerBufferSize)
+
+	slab := make([]byte, readerSlabSize)
+	leftover := []byte{}
+	var err error
 	for {
-		// ReadBytes returns err != nil if and only if the returned data does not
-		// end in delim.
-		bytea, err := reader.ReadBytes(delim)
-		byteaLen := len(bytea)
-		if len(bytea) > 0 {
-			if err == nil {
-				// get rid of carriage return if under Windows:
-				if util.IsWindows() && byteaLen >= 2 && bytea[byteaLen-2] == byte('\r') {
-					bytea = bytea[:byteaLen-2]
-				} else {
-					bytea = bytea[:byteaLen-1]
-				}
-			}
-			if r.pusher(bytea) {
-				r.eventBox.Set(EvtReadNew, nil)
+		n := 0
+		scope := slab[:util.Min(len(slab), readerBufferSize)]
+		for i := 0; i < 100; i++ {
+			n, err = src.Read(scope)
+			if n > 0 || err != nil {
+				break
 			}
 		}
-		if err != nil {
+
+		// We're not making any progress after 100 tries. Stop.
+		if n == 0 {
 			break
 		}
+
+		buf := slab[:n]
+		slab = slab[n:]
+
+		for len(buf) > 0 {
+			if i := bytes.IndexByte(buf, delim); i >= 0 {
+				// Found the delimiter
+				slice := buf[:i+1]
+				buf = buf[i+1:]
+				if trimCR && len(slice) >= 2 && slice[len(slice)-2] == byte('\r') {
+					slice = slice[:len(slice)-2]
+				} else {
+					slice = slice[:len(slice)-1]
+				}
+				if len(leftover) > 0 {
+					slice = append(leftover, slice...)
+					leftover = []byte{}
+				}
+				if (err == nil || len(slice) > 0) && r.pusher(slice) {
+					atomic.StoreInt32(&r.event, int32(EvtReadNew))
+				}
+			} else {
+				// Could not find the delimiter in the buffer
+				//   NOTE: We can further optimize this by keeping track of the cursor
+				//   position in the slab so that a straddling item that doesn't go
+				//   beyond the boundary of a slab doesn't need to be copied to
+				//   another buffer. However, the performance gain is negligible in
+				//   practice (< 0.1%) and is not
+				//   worth the added complexity.
+				leftover = append(leftover, buf...)
+				break
+			}
+		}
+
+		if err == io.EOF {
+			leftover = append(leftover, buf...)
+			break
+		}
+
+		if len(slab) == 0 {
+			slab = make([]byte, readerSlabSize)
+		}
+	}
+	if len(leftover) > 0 && r.pusher(leftover) {
+		atomic.StoreInt32(&r.event, int32(EvtReadNew))
 	}
 }
 
-func (r *Reader) readFromStdin() {
+func (r *Reader) readFromStdin() bool {
 	r.feed(os.Stdin)
+	return true
 }
 
-func (r *Reader) readFromCommand(cmd string) {
-	listCommand := util.ExecCommand(cmd)
-	out, err := listCommand.StdoutPipe()
-	if err != nil {
-		return
+func isSymlinkToDir(path string, de os.DirEntry) bool {
+	if de.Type()&fs.ModeSymlink == 0 {
+		return false
 	}
-	err = listCommand.Start()
-	if err != nil {
-		return
+	if s, err := os.Stat(path); err == nil {
+		return s.IsDir()
 	}
-	defer listCommand.Wait()
-	r.feed(out)
+	return false
+}
+
+func trimPath(path string) string {
+	bytes := stringBytes(path)
+
+	for len(bytes) > 1 && bytes[0] == '.' && (bytes[1] == '/' || bytes[1] == '\\') {
+		bytes = bytes[2:]
+	}
+
+	if len(bytes) == 0 {
+		return "."
+	}
+
+	return byteString(bytes)
+}
+
+func (r *Reader) readFiles(roots []string, opts walkerOpts, ignores []string) bool {
+	conf := fastwalk.Config{
+		Follow: opts.follow,
+		// Use forward slashes when running a Windows binary under WSL or MSYS
+		ToSlash: fastwalk.DefaultToSlash(),
+		Sort:    fastwalk.SortFilesFirst,
+	}
+	ignoresBase := []string{}
+	ignoresFull := []string{}
+	ignoresSuffix := []string{}
+	sep := string(os.PathSeparator)
+	if _, ok := os.LookupEnv("MSYSTEM"); ok {
+		sep = "/"
+	}
+	for _, ignore := range ignores {
+		if strings.ContainsRune(ignore, os.PathSeparator) {
+			if strings.HasPrefix(ignore, sep) {
+				ignoresSuffix = append(ignoresSuffix, ignore)
+			} else {
+				// 'foo/bar' should match match
+				// * 'foo/bar'
+				// * 'baz/foo/bar'
+				// * but NOT 'bazfoo/bar'
+				ignoresFull = append(ignoresFull, ignore)
+				ignoresSuffix = append(ignoresSuffix, sep+ignore)
+			}
+		} else {
+			ignoresBase = append(ignoresBase, ignore)
+		}
+	}
+	fn := func(path string, de os.DirEntry, err error) error {
+		if err != nil {
+			return nil
+		}
+		path = trimPath(path)
+		if path != "." {
+			isDir := de.IsDir()
+			if isDir || opts.follow && isSymlinkToDir(path, de) {
+				base := filepath.Base(path)
+				if !opts.hidden && base[0] == '.' && base != ".." {
+					return filepath.SkipDir
+				}
+				for _, ignore := range ignoresBase {
+					if ignore == base {
+						return filepath.SkipDir
+					}
+				}
+				for _, ignore := range ignoresFull {
+					if ignore == path {
+						return filepath.SkipDir
+					}
+				}
+				for _, ignore := range ignoresSuffix {
+					if strings.HasSuffix(path, ignore) {
+						return filepath.SkipDir
+					}
+				}
+				if path != sep {
+					path += sep
+				}
+			}
+			if ((opts.file && !isDir) || (opts.dir && isDir)) && r.pusher(stringBytes(path)) {
+				atomic.StoreInt32(&r.event, int32(EvtReadNew))
+			}
+		}
+		r.mutex.Lock()
+		defer r.mutex.Unlock()
+		if r.killed {
+			return context.Canceled
+		}
+		return nil
+	}
+	noerr := true
+	for _, root := range roots {
+		noerr = noerr && (fastwalk.Walk(&conf, root, fn) == nil)
+	}
+	return noerr
+}
+
+func (r *Reader) readFromCommand(command string, environ []string, signalReady func()) bool {
+	r.mutex.Lock()
+
+	r.killed = false
+	r.termFunc = nil
+	r.command = &command
+	exec := r.executor.ExecCommand(command, true)
+	if environ != nil {
+		exec.Env = environ
+	}
+	execOut, err := exec.StdoutPipe()
+	if err != nil || exec.Start() != nil {
+		signalReady()
+		r.mutex.Unlock()
+		return false
+	}
+
+	// Function to call to terminate the running command
+	r.termFunc = func() {
+		execOut.Close()
+		util.KillCommand(exec)
+	}
+
+	signalReady()
+	r.mutex.Unlock()
+
+	r.feed(execOut)
+	return exec.Wait() == nil
 }

src/reader_test.go

@@ -2,6 +2,7 @@ package fzf
 
 import (
 	"testing"
+	"time"
 
 	"github.com/junegunn/fzf/src/util"
 )
@@ -9,9 +10,12 @@ import (
 func TestReadFromCommand(t *testing.T) {
 	strs := []string{}
 	eb := util.NewEventBox()
-	reader := Reader{
-		pusher:   func(s []byte) bool { strs = append(strs, string(s)); return true },
-		eventBox: eb}
+	exec := util.NewExecutor("")
+	reader := NewReader(
+		func(s []byte) bool { strs = append(strs, string(s)); return true },
+		eb, exec, false, true)
+
+	reader.startEventPoller()
 
 	// Check EventBox
 	if eb.Peek(EvtReadNew) {
@@ -19,21 +23,20 @@ func TestReadFromCommand(t *testing.T) {
 	}
 
 	// Normal command
-	reader.readFromCommand(`echo abc && echo def`)
-	if len(strs) != 2 || strs[0] != "abc" || strs[1] != "def" {
+	counter := 0
+	ready := func() {
+		counter++
+	}
+	reader.fin(reader.readFromCommand(`echo abc&&echo def`, nil, ready))
+	if len(strs) != 2 || strs[0] != "abc" || strs[1] != "def" || counter != 1 {
 		t.Errorf("%s", strs)
 	}
 
 	// Check EventBox again
-	if !eb.Peek(EvtReadNew) {
-		t.Error("EvtReadNew should be set yet")
-	}
+	eb.WaitFor(EvtReadFin)
 
 	// Wait should return immediately
 	eb.Wait(func(events *util.Events) {
-		if _, found := (*events)[EvtReadNew]; !found {
-			t.Errorf("%s", events)
-		}
 		events.Clear()
 	})
 
@@ -42,15 +45,24 @@ func TestReadFromCommand(t *testing.T) {
 		t.Error("EvtReadNew should not be set yet")
 	}
 
+	// Make sure that event poller is finished
+	time.Sleep(readerPollIntervalMax)
+
+	// Restart event poller
+	reader.startEventPoller()
+
 	// Failing command
-	reader.readFromCommand(`no-such-command`)
+	reader.fin(reader.readFromCommand(`no-such-command`, nil, ready))
 	strs = []string{}
-	if len(strs) > 0 {
+	if len(strs) > 0 || counter != 2 {
 		t.Errorf("%s", strs)
 	}
 
 	// Check EventBox again
 	if eb.Peek(EvtReadNew) {
-		t.Error("Command failed. EvtReadNew should be set")
+		t.Error("Command failed. EvtReadNew should not be set")
+	}
+	if !eb.Peek(EvtReadFin) {
+		t.Error("EvtReadFin should be set")
 	}
 }

src/result.go

@@ -15,34 +15,31 @@ type Offset [2]int32
 type colorOffset struct {
 	offset [2]int32
 	color  tui.ColorPair
-	attr   tui.Attr
-	index  int32
-}
-
-type rank struct {
-	points [4]uint16
-	index  int32
+	match  bool
+	url    *url
 }
 
 type Result struct {
-	item *Item
-	rank rank
+	item   *Item
+	points [4]uint16
 }
 
-func buildResult(item *Item, offsets []Offset, score int, trimLen int) *Result {
+func buildResult(item *Item, offsets []Offset, score int) Result {
 	if len(offsets) > 1 {
 		sort.Sort(ByOrder(offsets))
 	}
 
-	result := Result{item: item, rank: rank{index: item.index}}
+	result := Result{item: item}
 	numChars := item.text.Length()
 	minBegin := math.MaxUint16
+	minEnd := math.MaxUint16
 	maxEnd := 0
 	validOffsetFound := false
 	for _, offset := range offsets {
 		b, e := int(offset[0]), int(offset[1])
 		if b < e {
 			minBegin = util.Min(b, minBegin)
+			minEnd = util.Min(e, minEnd)
 			maxEnd = util.Max(e, maxEnd)
 			validOffsetFound = true
 		}
@@ -54,9 +51,39 @@ func buildResult(item *Item, offsets []Offset, score int, trimLen int) *Result {
 		case byScore:
 			// Higher is better
 			val = math.MaxUint16 - util.AsUint16(score)
+		case byChunk:
+			if validOffsetFound {
+				b := minBegin
+				e := maxEnd
+				for ; b >= 1; b-- {
+					if unicode.IsSpace(item.text.Get(b - 1)) {
+						break
+					}
+				}
+				for ; e < numChars; e++ {
+					if unicode.IsSpace(item.text.Get(e)) {
+						break
+					}
+				}
+				val = util.AsUint16(e - b)
+			}
 		case byLength:
-			// If offsets is empty, trimLen will be 0, but we don't care
-			val = util.AsUint16(trimLen)
+			val = item.TrimLength()
+		case byPathname:
+			if validOffsetFound {
+				// lastDelim := strings.LastIndexByte(item.text.ToString(), '/')
+				lastDelim := -1
+				s := item.text.ToString()
+				for i := len(s) - 1; i >= 0; i-- {
+					if s[i] == '/' || s[i] == '\\' {
+						lastDelim = i
+						break
+					}
+				}
+				if lastDelim <= minBegin {
+					val = util.AsUint16(minBegin - lastDelim)
+				}
+			}
 		case byBegin, byEnd:
 			if validOffsetFound {
 				whitePrefixLen := 0
@@ -68,16 +95,16 @@ func buildResult(item *Item, offsets []Offset, score int, trimLen int) *Result {
 					}
 				}
 				if criterion == byBegin {
-					val = util.AsUint16(minBegin - whitePrefixLen)
+					val = util.AsUint16(minEnd - whitePrefixLen)
 				} else {
-					val = util.AsUint16(math.MaxUint16 - math.MaxUint16*(maxEnd-whitePrefixLen)/trimLen)
+					val = util.AsUint16(math.MaxUint16 - math.MaxUint16*(maxEnd-whitePrefixLen)/(int(item.TrimLength())+1))
 				}
 			}
 		}
-		result.rank.points[idx] = val
+		result.points[3-idx] = val
 	}
 
-	return &result
+	return result
 }
 
 // Sort criteria to use. Never changes once fzf is started.
@@ -85,28 +112,28 @@ var sortCriteria []criterion
 
 // Index returns ordinal index of the Item
 func (result *Result) Index() int32 {
-	return result.item.index
+	return result.item.Index()
 }
 
-func minRank() rank {
-	return rank{index: 0, points: [4]uint16{math.MaxUint16, 0, 0, 0}}
+func minRank() Result {
+	return Result{item: &minItem, points: [4]uint16{math.MaxUint16, 0, 0, 0}}
 }
 
-func (result *Result) colorOffsets(matchOffsets []Offset, theme *tui.ColorTheme, color tui.ColorPair, attr tui.Attr, current bool) []colorOffset {
+func (result *Result) colorOffsets(matchOffsets []Offset, nthOffsets []Offset, theme *tui.ColorTheme, colBase tui.ColorPair, colMatch tui.ColorPair, attrNth tui.Attr) []colorOffset {
 	itemColors := result.item.Colors()
 
-	// No ANSI code, or --color=no
-	if len(itemColors) == 0 {
+	// No ANSI codes
+	if len(itemColors) == 0 && len(nthOffsets) == 0 {
 		var offsets []colorOffset
 		for _, off := range matchOffsets {
-			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: color, attr: attr})
+			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: colMatch, match: true})
 		}
 		return offsets
 	}
 
 	// Find max column
 	var maxCol int32
-	for _, off := range matchOffsets {
+	for _, off := range append(matchOffsets, nthOffsets...) {
 		if off[1] > maxCol {
 			maxCol = off[1]
 		}
@@ -116,17 +143,30 @@ func (result *Result) colorOffsets(matchOffsets []Offset, theme *tui.ColorTheme,
 			maxCol = ansi.offset[1]
 		}
 	}
-	cols := make([]int, maxCol)
 
+	type cellInfo struct {
+		index int
+		color bool
+		match bool
+		nth   bool
+	}
+
+	cols := make([]cellInfo, maxCol)
 	for colorIndex, ansi := range itemColors {
 		for i := ansi.offset[0]; i < ansi.offset[1]; i++ {
-			cols[i] = colorIndex + 1 // XXX
+			cols[i] = cellInfo{colorIndex, true, false, false}
 		}
 	}
 
 	for _, off := range matchOffsets {
 		for i := off[0]; i < off[1]; i++ {
-			cols[i] = -1
+			cols[i].match = true
+		}
+	}
+
+	for _, off := range nthOffsets {
+		for i := off[0]; i < off[1]; i++ {
+			cols[i].nth = true
 		}
 	}
 
@@ -136,38 +176,70 @@ func (result *Result) colorOffsets(matchOffsets []Offset, theme *tui.ColorTheme,
 	// ------------  ----  --  ----
 	//   ++++++++      ++++++++++
 	// --++++++++--  --++++++++++---
-	curr := 0
+	var curr cellInfo = cellInfo{0, false, false, false}
 	start := 0
+	ansiToColorPair := func(ansi ansiOffset, base tui.ColorPair) tui.ColorPair {
+		fg := ansi.color.fg
+		bg := ansi.color.bg
+		if fg == -1 {
+			fg = colBase.Fg()
+		}
+		if bg == -1 {
+			bg = colBase.Bg()
+		}
+		return tui.NewColorPair(fg, bg, ansi.color.attr).MergeAttr(base)
+	}
 	var colors []colorOffset
 	add := func(idx int) {
-		if curr != 0 && idx > start {
-			if curr == -1 {
-				colors = append(colors, colorOffset{
-					offset: [2]int32{int32(start), int32(idx)}, color: color, attr: attr})
-			} else {
-				ansi := itemColors[curr-1]
-				fg := ansi.color.fg
-				bg := ansi.color.bg
-				if theme != nil {
-					if fg == -1 {
-						if current {
-							fg = theme.Current
-						} else {
-							fg = theme.Fg
-						}
-					}
-					if bg == -1 {
-						if current {
-							bg = theme.DarkBg
-						} else {
-							bg = theme.Bg
+		if (curr.color || curr.nth || curr.match) && idx > start {
+			if curr.match {
+				var color tui.ColorPair
+				if curr.nth {
+					color = colBase.WithAttr(attrNth).Merge(colMatch)
+				} else {
+					color = colBase.Merge(colMatch)
+				}
+				var url *url
+				if curr.color && theme.Colored {
+					ansi := itemColors[curr.index]
+					url = ansi.color.url
+					origColor := ansiToColorPair(ansi, colMatch)
+					// hl or hl+ only sets the foreground color, so colMatch is the
+					// combination of either [hl and bg] or [hl+ and bg+].
+					//
+					// If the original text already has background color, and the
+					// foreground color of colMatch is -1, we shouldn't only apply the
+					// background color of colMatch.
+					// e.g. echo -e "\x1b[32;7mfoo\x1b[mbar" | fzf --ansi --color bg+:1,hl+:-1:underline
+					//      echo -e "\x1b[42mfoo\x1b[mbar" | fzf --ansi --color bg+:1,hl+:-1:underline
+					if color.Fg().IsDefault() && origColor.HasBg() {
+						color = origColor
+						if curr.nth {
+							color = color.WithAttr(attrNth)
 						}
+					} else {
+						color = origColor.MergeNonDefault(color)
 					}
 				}
+				colors = append(colors, colorOffset{
+					offset: [2]int32{int32(start), int32(idx)}, color: color, match: true, url: url})
+			} else if curr.color {
+				ansi := itemColors[curr.index]
+				color := ansiToColorPair(ansi, colBase)
+				if curr.nth {
+					color = color.WithAttr(attrNth)
+				}
 				colors = append(colors, colorOffset{
 					offset: [2]int32{int32(start), int32(idx)},
-					color:  tui.NewColorPair(fg, bg),
-					attr:   ansi.color.attr.Merge(attr)})
+					color:  color,
+					match:  false,
+					url:    ansi.color.url})
+			} else {
+				colors = append(colors, colorOffset{
+					offset: [2]int32{int32(start), int32(idx)},
+					color:  colBase.WithAttr(attrNth),
+					match:  false,
+					url:    nil})
 			}
 		}
 	}
@@ -200,7 +272,7 @@ func (a ByOrder) Less(i, j int) bool {
 }
 
 // ByRelevance is for sorting Items
-type ByRelevance []*Result
+type ByRelevance []Result
 
 func (a ByRelevance) Len() int {
 	return len(a)
@@ -211,11 +283,11 @@ func (a ByRelevance) Swap(i, j int) {
 }
 
 func (a ByRelevance) Less(i, j int) bool {
-	return compareRanks((*a[i]).rank, (*a[j]).rank, false)
+	return compareRanks(a[i], a[j], false)
 }
 
 // ByRelevanceTac is for sorting Items
-type ByRelevanceTac []*Result
+type ByRelevanceTac []Result
 
 func (a ByRelevanceTac) Len() int {
 	return len(a)
@@ -226,18 +298,5 @@ func (a ByRelevanceTac) Swap(i, j int) {
 }
 
 func (a ByRelevanceTac) Less(i, j int) bool {
-	return compareRanks((*a[i]).rank, (*a[j]).rank, true)
-}
-
-func compareRanks(irank rank, jrank rank, tac bool) bool {
-	for idx := 0; idx < 4; idx++ {
-		left := irank.points[idx]
-		right := jrank.points[idx]
-		if left < right {
-			return true
-		} else if left > right {
-			return false
-		}
-	}
-	return (irank.index <= jrank.index) != tac
+	return compareRanks(a[i], a[j], true)
 }

src/result_others.go

@@ -0,0 +1,16 @@
+//go:build !386 && !amd64
+
+package fzf
+
+func compareRanks(irank Result, jrank Result, tac bool) bool {
+	for idx := 3; idx >= 0; idx-- {
+		left := irank.points[idx]
+		right := jrank.points[idx]
+		if left < right {
+			return true
+		} else if left > right {
+			return false
+		}
+	}
+	return (irank.item.Index() <= jrank.item.Index()) != tac
+}

src/result_test.go

@@ -1,5 +1,3 @@
-// +build !tcell
-
 package fzf
 
 import (
@@ -11,10 +9,15 @@ import (
 	"github.com/junegunn/fzf/src/util"
 )
 
+func withIndex(i *Item, index int) *Item {
+	(*i).text.Index = int32(index)
+	return i
+}
+
 func TestOffsetSort(t *testing.T) {
 	offsets := []Offset{
-		Offset{3, 5}, Offset{2, 7},
-		Offset{1, 3}, Offset{2, 9}}
+		{3, 5}, {2, 7},
+		{1, 3}, {2, 9}}
 	sort.Sort(ByOrder(offsets))
 
 	if offsets[0][0] != 1 || offsets[0][1] != 3 ||
@@ -26,10 +29,10 @@ func TestOffsetSort(t *testing.T) {
 }
 
 func TestRankComparison(t *testing.T) {
-	rank := func(vals ...uint16) rank {
-		return rank{
+	rank := func(vals ...uint16) Result {
+		return Result{
 			points: [4]uint16{vals[0], vals[1], vals[2], vals[3]},
-			index:  int32(vals[4])}
+			item:   &Item{text: util.Chars{Index: int32(vals[4])}}}
 	}
 	if compareRanks(rank(3, 0, 0, 0, 5), rank(2, 0, 0, 0, 7), false) ||
 		!compareRanks(rank(3, 0, 0, 0, 5), rank(3, 0, 0, 0, 6), false) ||
@@ -51,37 +54,42 @@ func TestResultRank(t *testing.T) {
 	// FIXME global
 	sortCriteria = []criterion{byScore, byLength}
 
-	strs := [][]rune{[]rune("foo"), []rune("foobar"), []rune("bar"), []rune("baz")}
-	item1 := buildResult(&Item{text: util.RunesToChars(strs[0]), index: 1}, []Offset{}, 2, 3)
-	if item1.rank.points[0] != math.MaxUint16-2 || // Bonus
-		item1.rank.points[1] != 3 || // Length
-		item1.rank.points[2] != 0 || // Unused
-		item1.rank.points[3] != 0 || // Unused
-		item1.item.index != 1 {
-		t.Error(item1.rank)
+	str := []rune("foo")
+	item1 := buildResult(
+		withIndex(&Item{text: util.RunesToChars(str)}, 1), []Offset{}, 2)
+	if item1.points[3] != math.MaxUint16-2 || // Bonus
+		item1.points[2] != 3 || // Length
+		item1.points[1] != 0 || // Unused
+		item1.points[0] != 0 || // Unused
+		item1.item.Index() != 1 {
+		t.Error(item1)
 	}
 	// Only differ in index
-	item2 := buildResult(&Item{text: util.RunesToChars(strs[0])}, []Offset{}, 2, 3)
+	item2 := buildResult(&Item{text: util.RunesToChars(str)}, []Offset{}, 2)
 
-	items := []*Result{item1, item2}
+	items := []Result{item1, item2}
 	sort.Sort(ByRelevance(items))
 	if items[0] != item2 || items[1] != item1 {
 		t.Error(items)
 	}
 
-	items = []*Result{item2, item1, item1, item2}
+	items = []Result{item2, item1, item1, item2}
 	sort.Sort(ByRelevance(items))
 	if items[0] != item2 || items[1] != item2 ||
 		items[2] != item1 || items[3] != item1 {
-		t.Error(items, item1, item1.item.index, item2, item2.item.index)
+		t.Error(items, item1, item1.item.Index(), item2, item2.item.Index())
 	}
 
 	// Sort by relevance
-	item3 := buildResult(&Item{index: 2}, []Offset{Offset{1, 3}, Offset{5, 7}}, 3, 0)
-	item4 := buildResult(&Item{index: 2}, []Offset{Offset{1, 2}, Offset{6, 7}}, 4, 0)
-	item5 := buildResult(&Item{index: 2}, []Offset{Offset{1, 3}, Offset{5, 7}}, 5, 0)
-	item6 := buildResult(&Item{index: 2}, []Offset{Offset{1, 2}, Offset{6, 7}}, 6, 0)
-	items = []*Result{item1, item2, item3, item4, item5, item6}
+	item3 := buildResult(
+		withIndex(&Item{}, 2), []Offset{{1, 3}, {5, 7}}, 3)
+	item4 := buildResult(
+		withIndex(&Item{}, 2), []Offset{{1, 2}, {6, 7}}, 4)
+	item5 := buildResult(
+		withIndex(&Item{}, 2), []Offset{{1, 3}, {5, 7}}, 5)
+	item6 := buildResult(
+		withIndex(&Item{}, 2), []Offset{{1, 2}, {6, 7}}, 6)
+	items = []Result{item1, item2, item3, item4, item5, item6}
 	sort.Sort(ByRelevance(items))
 	if !(items[0] == item6 && items[1] == item5 &&
 		items[2] == item4 && items[3] == item3 &&
@@ -90,37 +98,87 @@ func TestResultRank(t *testing.T) {
 	}
 }
 
+func TestChunkTiebreak(t *testing.T) {
+	// FIXME global
+	sortCriteria = []criterion{byScore, byChunk}
+
+	score := 100
+	test := func(input string, offset Offset, chunk string) {
+		item := buildResult(withIndex(&Item{text: util.RunesToChars([]rune(input))}, 1), []Offset{offset}, score)
+		if !(item.points[3] == math.MaxUint16-uint16(score) && item.points[2] == uint16(len(chunk))) {
+			t.Error(item.points)
+		}
+	}
+	test("hello foobar goodbye", Offset{8, 9}, "foobar")
+	test("hello foobar goodbye", Offset{7, 18}, "foobar goodbye")
+	test("hello foobar goodbye", Offset{0, 1}, "hello")
+	test("hello foobar goodbye", Offset{5, 7}, "hello foobar") // TBD
+}
+
 func TestColorOffset(t *testing.T) {
 	// ------------ 20 ----  --  ----
 	//   ++++++++        ++++++++++
 	// --++++++++--    --++++++++++---
 
-	offsets := []Offset{Offset{5, 15}, Offset{25, 35}}
+	offsets := []Offset{{5, 15}, {10, 12}, {25, 35}}
 	item := Result{
 		item: &Item{
 			colors: &[]ansiOffset{
-				ansiOffset{[2]int32{0, 20}, ansiState{1, 5, 0}},
-				ansiOffset{[2]int32{22, 27}, ansiState{2, 6, tui.Bold}},
-				ansiOffset{[2]int32{30, 32}, ansiState{3, 7, 0}},
-				ansiOffset{[2]int32{33, 40}, ansiState{4, 8, tui.Bold}}}}}
-	// [{[0 5] 9 false} {[5 15] 99 false} {[15 20] 9 false} {[22 25] 10 true} {[25 35] 99 false} {[35 40] 11 true}]
+				{[2]int32{0, 20}, ansiState{1, 5, 0, -1, nil}},
+				{[2]int32{22, 27}, ansiState{2, 6, tui.Bold, -1, nil}},
+				{[2]int32{30, 32}, ansiState{3, 7, 0, -1, nil}},
+				{[2]int32{33, 40}, ansiState{4, 8, tui.Bold, -1, nil}}}}}
 
-	pair := tui.NewColorPair(99, 199)
-	colors := item.colorOffsets(offsets, tui.Dark256, pair, tui.AttrRegular, true)
-	assert := func(idx int, b int32, e int32, c tui.ColorPair, bold bool) {
-		var attr tui.Attr
-		if bold {
-			attr = tui.Bold
-		}
+	colBase := tui.NewColorPair(89, 189, tui.AttrUndefined)
+	colMatch := tui.NewColorPair(99, 199, tui.AttrUndefined)
+	colors := item.colorOffsets(offsets, nil, tui.Dark256, colBase, colMatch, tui.AttrUndefined)
+	assert := func(idx int, b int32, e int32, c tui.ColorPair) {
 		o := colors[idx]
-		if o.offset[0] != b || o.offset[1] != e || o.color != c || o.attr != attr {
-			t.Error(o)
+		if o.offset[0] != b || o.offset[1] != e || o.color != c {
+			t.Error(o, b, e, c)
 		}
 	}
-	assert(0, 0, 5, tui.NewColorPair(1, 5), false)
-	assert(1, 5, 15, pair, false)
-	assert(2, 15, 20, tui.NewColorPair(1, 5), false)
-	assert(3, 22, 25, tui.NewColorPair(2, 6), true)
-	assert(4, 25, 35, pair, false)
-	assert(5, 35, 40, tui.NewColorPair(4, 8), true)
+	// [{[0 5] {1 5 0}} {[5 15] {99 199 0}} {[15 20] {1 5 0}}
+	//  {[22 25] {2 6 1}} {[25 27] {99 199 1}} {[27 30] {99 199 0}}
+	//  {[30 32] {99 199 0}} {[32 33] {99 199 0}} {[33 35] {99 199 1}}
+	//  {[35 40] {4 8 1}}]
+	assert(0, 0, 5, tui.NewColorPair(1, 5, tui.AttrUndefined))
+	assert(1, 5, 15, colMatch)
+	assert(2, 15, 20, tui.NewColorPair(1, 5, tui.AttrUndefined))
+	assert(3, 22, 25, tui.NewColorPair(2, 6, tui.Bold))
+	assert(4, 25, 27, colMatch.WithAttr(tui.Bold))
+	assert(5, 27, 30, colMatch)
+	assert(6, 30, 32, colMatch)
+	assert(7, 32, 33, colMatch) // TODO: Should we merge consecutive blocks?
+	assert(8, 33, 35, colMatch.WithAttr(tui.Bold))
+	assert(9, 35, 40, tui.NewColorPair(4, 8, tui.Bold))
+
+	colRegular := tui.NewColorPair(-1, -1, tui.AttrUndefined)
+	colUnderline := tui.NewColorPair(-1, -1, tui.Underline)
+
+	nthOffsets := []Offset{{37, 39}, {42, 45}}
+	for _, attr := range []tui.Attr{tui.AttrRegular, tui.StrikeThrough} {
+		colors = item.colorOffsets(offsets, nthOffsets, tui.Dark256, colRegular, colUnderline, attr)
+
+		// [{[0 5] {1 5 0}} {[5 15] {1 5 8}} {[15 20] {1 5 0}}
+		//  {[22 25] {2 6 1}} {[25 27] {2 6 9}} {[27 30] {-1 -1 8}}
+		//  {[30 32] {3 7 8}} {[32 33] {-1 -1 8}} {[33 35] {4 8 9}}
+		//  {[35 37] {4 8 1}} {[37 39] {4 8 x|1}} {[39 40] {4 8 x|1}}]
+		assert(0, 0, 5, tui.NewColorPair(1, 5, tui.AttrUndefined))
+		assert(1, 5, 15, tui.NewColorPair(1, 5, tui.Underline))
+		assert(2, 15, 20, tui.NewColorPair(1, 5, tui.AttrUndefined))
+		assert(3, 22, 25, tui.NewColorPair(2, 6, tui.Bold))
+		assert(4, 25, 27, tui.NewColorPair(2, 6, tui.Bold|tui.Underline))
+		assert(5, 27, 30, colUnderline)
+		assert(6, 30, 32, tui.NewColorPair(3, 7, tui.Underline))
+		assert(7, 32, 33, colUnderline)
+		assert(8, 33, 35, tui.NewColorPair(4, 8, tui.Bold|tui.Underline))
+		assert(9, 35, 37, tui.NewColorPair(4, 8, tui.Bold))
+		expected := tui.Bold | attr
+		if attr == tui.AttrRegular {
+			expected = tui.AttrRegular
+		}
+		assert(10, 37, 39, tui.NewColorPair(4, 8, expected))
+		assert(11, 39, 40, tui.NewColorPair(4, 8, tui.Bold))
+	}
 }

src/result_x86.go

@@ -0,0 +1,16 @@
+//go:build 386 || amd64
+
+package fzf
+
+import "unsafe"
+
+func compareRanks(irank Result, jrank Result, tac bool) bool {
+	left := *(*uint64)(unsafe.Pointer(&irank.points[0]))
+	right := *(*uint64)(unsafe.Pointer(&jrank.points[0]))
+	if left < right {
+		return true
+	} else if left > right {
+		return false
+	}
+	return (irank.item.Index() <= jrank.item.Index()) != tac
+}

src/server.go

@@ -0,0 +1,246 @@
+package fzf
+
+import (
+	"bufio"
+	"bytes"
+	"crypto/subtle"
+	"errors"
+	"fmt"
+	"net"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var getRegex *regexp.Regexp
+
+func init() {
+	getRegex = regexp.MustCompile(`^GET /(?:\?([a-z0-9=&]+))? HTTP`)
+}
+
+type getParams struct {
+	limit  int
+	offset int
+}
+
+const (
+	crlf             = "\r\n"
+	httpOk           = "HTTP/1.1 200 OK" + crlf
+	httpBadRequest   = "HTTP/1.1 400 Bad Request" + crlf
+	httpUnauthorized = "HTTP/1.1 401 Unauthorized" + crlf
+	httpUnavailable  = "HTTP/1.1 503 Service Unavailable" + crlf
+	httpReadTimeout  = 10 * time.Second
+	channelTimeout   = 2 * time.Second
+	jsonContentType  = "Content-Type: application/json" + crlf
+	maxContentLength = 1024 * 1024
+)
+
+type httpServer struct {
+	apiKey        []byte
+	actionChannel chan []*action
+	getHandler    func(getParams) string
+}
+
+type listenAddress struct {
+	host string
+	port int
+}
+
+func (addr listenAddress) IsLocal() bool {
+	return addr.host == "localhost" || addr.host == "127.0.0.1"
+}
+
+var defaultListenAddr = listenAddress{"localhost", 0}
+
+func parseListenAddress(address string) (listenAddress, error) {
+	parts := strings.SplitN(address, ":", 3)
+	if len(parts) == 1 {
+		parts = []string{"localhost", parts[0]}
+	}
+	if len(parts) != 2 {
+		return defaultListenAddr, fmt.Errorf("invalid listen address: %s", address)
+	}
+	portStr := parts[len(parts)-1]
+	port, err := strconv.Atoi(portStr)
+	if err != nil || port < 0 || port > 65535 {
+		return defaultListenAddr, fmt.Errorf("invalid listen port: %s", portStr)
+	}
+	if len(parts[0]) == 0 {
+		parts[0] = "localhost"
+	}
+	return listenAddress{parts[0], port}, nil
+}
+
+func startHttpServer(address listenAddress, actionChannel chan []*action, getHandler func(getParams) string) (net.Listener, int, error) {
+	host := address.host
+	port := address.port
+	apiKey := os.Getenv("FZF_API_KEY")
+	if !address.IsLocal() && len(apiKey) == 0 {
+		return nil, port, errors.New("FZF_API_KEY is required to allow remote access")
+	}
+	addrStr := fmt.Sprintf("%s:%d", host, port)
+	listener, err := net.Listen("tcp", addrStr)
+	if err != nil {
+		return nil, port, fmt.Errorf("failed to listen on %s", addrStr)
+	}
+	if port == 0 {
+		addr := listener.Addr().String()
+		parts := strings.Split(addr, ":")
+		if len(parts) < 2 {
+			return nil, port, fmt.Errorf("cannot extract port: %s", addr)
+		}
+		var err error
+		port, err = strconv.Atoi(parts[len(parts)-1])
+		if err != nil {
+			return nil, port, err
+		}
+	}
+
+	server := httpServer{
+		apiKey:        []byte(apiKey),
+		actionChannel: actionChannel,
+		getHandler:    getHandler,
+	}
+
+	go func() {
+		for {
+			conn, err := listener.Accept()
+			if err != nil {
+				if errors.Is(err, net.ErrClosed) {
+					return
+				}
+				continue
+			}
+			conn.Write([]byte(server.handleHttpRequest(conn)))
+			conn.Close()
+		}
+	}()
+
+	return listener, port, nil
+}
+
+// Here we are writing a simplistic HTTP server without using net/http
+// package to reduce the size of the binary.
+//
+// * No --listen:            2.8MB
+// * --listen with net/http: 5.7MB
+// * --listen w/o net/http:  3.3MB
+func (server *httpServer) handleHttpRequest(conn net.Conn) string {
+	contentLength := 0
+	apiKey := ""
+	body := ""
+	answer := func(code string, message string) string {
+		message += "\n"
+		return code + fmt.Sprintf("Content-Length: %d%s", len(message), crlf+crlf+message)
+	}
+	unauthorized := func(message string) string {
+		return answer(httpUnauthorized, message)
+	}
+	bad := func(message string) string {
+		return answer(httpBadRequest, message)
+	}
+	good := func(message string) string {
+		return answer(httpOk+jsonContentType, message)
+	}
+	conn.SetReadDeadline(time.Now().Add(httpReadTimeout))
+	scanner := bufio.NewScanner(conn)
+	scanner.Split(func(data []byte, atEOF bool) (int, []byte, error) {
+		found := bytes.Index(data, []byte(crlf))
+		if found >= 0 {
+			token := data[:found+len(crlf)]
+			return len(token), token, nil
+		}
+		if atEOF || len(body)+len(data) >= contentLength {
+			return 0, data, bufio.ErrFinalToken
+		}
+		return 0, nil, nil
+	})
+
+	section := 0
+	for scanner.Scan() {
+		text := scanner.Text()
+		switch section {
+		case 0:
+			getMatch := getRegex.FindStringSubmatch(text)
+			if len(getMatch) > 0 {
+				response := server.getHandler(parseGetParams(getMatch[1]))
+				if len(response) > 0 {
+					return good(response)
+				}
+				return answer(httpUnavailable+jsonContentType, `{"error":"timeout"}`)
+			} else if !strings.HasPrefix(text, "POST / HTTP") {
+				return bad("invalid request method")
+			}
+			section++
+		case 1:
+			if text == crlf {
+				if contentLength == 0 {
+					return bad("content-length header missing")
+				}
+				section++
+				continue
+			}
+			pair := strings.SplitN(text, ":", 2)
+			if len(pair) == 2 {
+				switch strings.ToLower(pair[0]) {
+				case "content-length":
+					length, err := strconv.Atoi(strings.TrimSpace(pair[1]))
+					if err != nil || length <= 0 || length > maxContentLength {
+						return bad("invalid content length")
+					}
+					contentLength = length
+				case "x-api-key":
+					apiKey = strings.TrimSpace(pair[1])
+				}
+			}
+		case 2:
+			body += text
+		}
+	}
+
+	if len(server.apiKey) != 0 && subtle.ConstantTimeCompare([]byte(apiKey), server.apiKey) != 1 {
+		return unauthorized("invalid api key")
+	}
+
+	if len(body) < contentLength {
+		return bad("incomplete request")
+	}
+	body = body[:contentLength]
+
+	actions, err := parseSingleActionList(strings.Trim(string(body), "\r\n"))
+	if err != nil {
+		return bad(err.Error())
+	}
+	if len(actions) == 0 {
+		return bad("no action specified")
+	}
+
+	select {
+	case server.actionChannel <- actions:
+	case <-time.After(channelTimeout):
+		return httpUnavailable + crlf
+	}
+	return httpOk + crlf
+}
+
+func parseGetParams(query string) getParams {
+	params := getParams{limit: 100, offset: 0}
+	for _, pair := range strings.Split(query, "&") {
+		parts := strings.SplitN(pair, "=", 2)
+		if len(parts) == 2 {
+			switch parts[0] {
+			case "limit", "offset":
+				if val, err := strconv.Atoi(parts[1]); err == nil {
+					if parts[0] == "limit" {
+						params.limit = val
+					} else {
+						params.offset = val
+					}
+				}
+			}
+		}
+	}
+	return params
+}

src/terminal_test.go

@@ -1,73 +1,700 @@
 package fzf
 
 import (
+	"bytes"
+	"io"
+	"os"
 	"regexp"
+	"strings"
 	"testing"
+	"text/template"
 
 	"github.com/junegunn/fzf/src/util"
 )
 
-func newItem(str string) *Item {
-	bytes := []byte(str)
-	trimmed, _, _ := extractColor(str, nil, nil)
-	return &Item{origText: &bytes, text: util.RunesToChars([]rune(trimmed))}
+func replacePlaceholderTest(template string, stripAnsi bool, delimiter Delimiter, printsep string, forcePlus bool, query string, allItems []*Item) string {
+	replaced, _ := replacePlaceholder(replacePlaceholderParams{
+		template:   template,
+		stripAnsi:  stripAnsi,
+		delimiter:  delimiter,
+		printsep:   printsep,
+		forcePlus:  forcePlus,
+		query:      query,
+		allItems:   allItems,
+		lastAction: actBackwardDeleteCharEof,
+		prompt:     "prompt",
+		executor:   util.NewExecutor(""),
+	})
+	return replaced
 }
 
 func TestReplacePlaceholder(t *testing.T) {
-	items1 := []*Item{newItem("  foo'bar \x1b[31mbaz\x1b[m")}
+	item1 := newItem("  foo'bar \x1b[31mbaz\x1b[m")
+	items1 := []*Item{item1, item1}
 	items2 := []*Item{
+		newItem("foo'bar \x1b[31mbaz\x1b[m"),
 		newItem("foo'bar \x1b[31mbaz\x1b[m"),
 		newItem("FOO'BAR \x1b[31mBAZ\x1b[m")}
 
+	delim := "'"
+	var regex *regexp.Regexp
+
 	var result string
 	check := func(expected string) {
 		if result != expected {
 			t.Errorf("expected: %s, actual: %s", expected, result)
 		}
 	}
+	// helper function that converts template format into string and carries out the check()
+	checkFormat := func(format string) {
+		type quotes struct{ O, I, S string } // outer, inner quotes, print separator
+		unixStyle := quotes{`'`, `'\''`, "\n"}
+		windowsStyle := quotes{`^"`, `'`, "\n"}
+		var effectiveStyle quotes
+
+		if util.IsWindows() {
+			effectiveStyle = windowsStyle
+		} else {
+			effectiveStyle = unixStyle
+		}
+
+		expected := templateToString(format, effectiveStyle)
+		check(expected)
+	}
+	printsep := "\n"
+
+	/*
+		Test multiple placeholders and the function parameters.
+	*/
 
 	// {}, preserve ansi
-	result = replacePlaceholder("echo {}", false, Delimiter{}, "query", items1)
-	check("echo '  foo'\\''bar \x1b[31mbaz\x1b[m'")
+	result = replacePlaceholderTest("echo {}", false, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar \x1b[31mbaz\x1b[m{{.O}}")
 
 	// {}, strip ansi
-	result = replacePlaceholder("echo {}", true, Delimiter{}, "query", items1)
-	check("echo '  foo'\\''bar baz'")
+	result = replacePlaceholderTest("echo {}", true, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}")
+
+	// {r}, strip ansi
+	result = replacePlaceholderTest("echo {r}", true, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo   foo'bar baz")
+
+	// {r..}, strip ansi
+	result = replacePlaceholderTest("echo {r..}", true, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo foo'bar baz")
 
 	// {}, with multiple items
-	result = replacePlaceholder("echo {}", true, Delimiter{}, "query", items2)
-	check("echo 'foo'\\''bar baz' 'FOO'\\''BAR BAZ'")
+	result = replacePlaceholderTest("echo {}", true, Delimiter{}, printsep, false, "query", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar baz{{.O}}")
 
 	// {..}, strip leading whitespaces, preserve ansi
-	result = replacePlaceholder("echo {..}", false, Delimiter{}, "query", items1)
-	check("echo 'foo'\\''bar \x1b[31mbaz\x1b[m'")
+	result = replacePlaceholderTest("echo {..}", false, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}foo{{.I}}bar \x1b[31mbaz\x1b[m{{.O}}")
 
 	// {..}, strip leading whitespaces, strip ansi
-	result = replacePlaceholder("echo {..}", true, Delimiter{}, "query", items1)
-	check("echo 'foo'\\''bar baz'")
+	result = replacePlaceholderTest("echo {..}", true, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}foo{{.I}}bar baz{{.O}}")
 
 	// {q}
-	result = replacePlaceholder("echo {} {q}", true, Delimiter{}, "query", items1)
-	check("echo '  foo'\\''bar baz' 'query'")
+	result = replacePlaceholderTest("echo {} {q}", true, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}} {{.O}}query{{.O}}")
 
 	// {q}, multiple items
-	result = replacePlaceholder("echo {}{q}{}", true, Delimiter{}, "query 'string'", items2)
-	check("echo 'foo'\\''bar baz' 'FOO'\\''BAR BAZ''query '\\''string'\\''''foo'\\''bar baz' 'FOO'\\''BAR BAZ'")
+	result = replacePlaceholderTest("echo {+}{q}{+}", true, Delimiter{}, printsep, false, "query 'string'", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar baz{{.O}} {{.O}}FOO{{.I}}BAR BAZ{{.O}}{{.O}}query {{.I}}string{{.I}}{{.O}}{{.O}}foo{{.I}}bar baz{{.O}} {{.O}}FOO{{.I}}BAR BAZ{{.O}}")
 
-	result = replacePlaceholder("echo {1}/{2}/{2,1}/{-1}/{-2}/{}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, "query", items1)
-	check("echo 'foo'\\''bar'/'baz'/'bazfoo'\\''bar'/'baz'/'foo'\\''bar'/'  foo'\\''bar baz'/'foo'\\''bar baz'/{n.t}/{}/{1}/{q}/''")
+	result = replacePlaceholderTest("echo {}{q}{}", true, Delimiter{}, printsep, false, "query 'string'", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar baz{{.O}}{{.O}}query {{.I}}string{{.I}}{{.O}}{{.O}}foo{{.I}}bar baz{{.O}}")
 
-	result = replacePlaceholder("echo {1}/{2}/{-1}/{-2}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, "query", items2)
-	check("echo 'foo'\\''bar' 'FOO'\\''BAR'/'baz' 'BAZ'/'baz' 'BAZ'/'foo'\\''bar' 'FOO'\\''BAR'/'foo'\\''bar baz' 'FOO'\\''BAR BAZ'/{n.t}/{}/{1}/{q}/'' ''")
+	result = replacePlaceholderTest("echo {1}/{2}/{2,1}/{-1}/{-2}/{}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}foo{{.I}}bar{{.O}}/{{.O}}baz{{.O}}/{{.O}}bazfoo{{.I}}bar{{.O}}/{{.O}}baz{{.O}}/{{.O}}foo{{.I}}bar{{.O}}/{{.O}}  foo{{.I}}bar baz{{.O}}/{{.O}}foo{{.I}}bar baz{{.O}}/{n.t}/{}/{1}/{q}/{{.O}}{{.O}}")
+
+	result = replacePlaceholderTest("echo {1}/{2}/{-1}/{-2}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, false, "query", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar{{.O}}/{{.O}}baz{{.O}}/{{.O}}baz{{.O}}/{{.O}}foo{{.I}}bar{{.O}}/{{.O}}foo{{.I}}bar baz{{.O}}/{n.t}/{}/{1}/{q}/{{.O}}{{.O}}")
+
+	result = replacePlaceholderTest("echo {+1}/{+2}/{+-1}/{+-2}/{+..}/{n.t}/\\{}/\\{1}/\\{q}/{+3}", true, Delimiter{}, printsep, false, "query", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar{{.O}} {{.O}}FOO{{.I}}BAR{{.O}}/{{.O}}baz{{.O}} {{.O}}BAZ{{.O}}/{{.O}}baz{{.O}} {{.O}}BAZ{{.O}}/{{.O}}foo{{.I}}bar{{.O}} {{.O}}FOO{{.I}}BAR{{.O}}/{{.O}}foo{{.I}}bar baz{{.O}} {{.O}}FOO{{.I}}BAR BAZ{{.O}}/{n.t}/{}/{1}/{q}/{{.O}}{{.O}} {{.O}}{{.O}}")
+
+	// forcePlus
+	result = replacePlaceholderTest("echo {1}/{2}/{-1}/{-2}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, true, "query", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar{{.O}} {{.O}}FOO{{.I}}BAR{{.O}}/{{.O}}baz{{.O}} {{.O}}BAZ{{.O}}/{{.O}}baz{{.O}} {{.O}}BAZ{{.O}}/{{.O}}foo{{.I}}bar{{.O}} {{.O}}FOO{{.I}}BAR{{.O}}/{{.O}}foo{{.I}}bar baz{{.O}} {{.O}}FOO{{.I}}BAR BAZ{{.O}}/{n.t}/{}/{1}/{q}/{{.O}}{{.O}} {{.O}}{{.O}}")
+
+	// Whitespace preserving flag with "'" delimiter
+	result = replacePlaceholderTest("echo {s1}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.O}}")
+
+	result = replacePlaceholderTest("echo {s2}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}bar baz{{.O}}")
+
+	result = replacePlaceholderTest("echo {s}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}")
+
+	result = replacePlaceholderTest("echo {s..}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}")
+
+	// Whitespace preserving flag with regex delimiter
+	regex = regexp.MustCompile(`\w+`)
+
+	result = replacePlaceholderTest("echo {s1}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  {{.O}}")
+
+	result = replacePlaceholderTest("echo {s2}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}{{.I}}{{.O}}")
+
+	result = replacePlaceholderTest("echo {s3}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}} {{.O}}")
+
+	// No match
+	result = replacePlaceholderTest("echo {}/{+}", true, Delimiter{}, printsep, false, "query", []*Item{nil, nil})
+	check("echo /")
+
+	// No match, but with selections
+	result = replacePlaceholderTest("echo {}/{+}", true, Delimiter{}, printsep, false, "query", []*Item{nil, item1})
+	checkFormat("echo /{{.O}}  foo{{.I}}bar baz{{.O}}")
 
 	// String delimiter
-	delim := "'"
-	result = replacePlaceholder("echo {}/{1}/{2}", true, Delimiter{str: &delim}, "query", items1)
-	check("echo '  foo'\\''bar baz'/'foo'/'bar baz'")
+	result = replacePlaceholderTest("echo {}/{1}/{2}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}/{{.O}}foo{{.O}}/{{.O}}bar baz{{.O}}")
 
 	// Regex delimiter
-	regex := regexp.MustCompile("[oa]+")
+	regex = regexp.MustCompile("[oa]+")
 	// foo'bar baz
-	result = replacePlaceholder("echo {}/{1}/{3}/{2..3}", true, Delimiter{regex: regex}, "query", items1)
-	check("echo '  foo'\\''bar baz'/'f'/'r b'/''\\''bar b'")
+	result = replacePlaceholderTest("echo {}/{1}/{3}/{2..3}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}/{{.O}}f{{.O}}/{{.O}}r b{{.O}}/{{.O}}{{.I}}bar b{{.O}}")
+
+	/*
+		Test single placeholders, but focus on the placeholders' parameters (e.g. flags).
+		see: TestParsePlaceholder
+	*/
+	items3 := []*Item{
+		// single line
+		newItem("1a 1b 1c 1d 1e 1f"),
+		// multi line
+		newItem("1a 1b 1c 1d 1e 1f"),
+		newItem("2a 2b 2c 2d 2e 2f"),
+		newItem("3a 3b 3c 3d 3e 3f"),
+		newItem("4a 4b 4c 4d 4e 4f"),
+		newItem("5a 5b 5c 5d 5e 5f"),
+		newItem("6a 6b 6c 6d 6e 6f"),
+		newItem("7a 7b 7c 7d 7e 7f"),
+	}
+	stripAnsi := false
+	forcePlus := false
+	query := "sample query"
+
+	templateToOutput := make(map[string]string)
+	templateToFile := make(map[string]string) // same as above, but the file contents will be matched
+	// I. item type placeholder
+	templateToOutput[`{}`] = `{{.O}}1a 1b 1c 1d 1e 1f{{.O}}`
+	templateToOutput[`{+}`] = `{{.O}}1a 1b 1c 1d 1e 1f{{.O}} {{.O}}2a 2b 2c 2d 2e 2f{{.O}} {{.O}}3a 3b 3c 3d 3e 3f{{.O}} {{.O}}4a 4b 4c 4d 4e 4f{{.O}} {{.O}}5a 5b 5c 5d 5e 5f{{.O}} {{.O}}6a 6b 6c 6d 6e 6f{{.O}} {{.O}}7a 7b 7c 7d 7e 7f{{.O}}`
+	templateToOutput[`{n}`] = `0`
+	templateToOutput[`{+n}`] = `0 0 0 0 0 0 0`
+	templateToFile[`{f}`] = `1a 1b 1c 1d 1e 1f{{.S}}`
+	templateToFile[`{+f}`] = `1a 1b 1c 1d 1e 1f{{.S}}2a 2b 2c 2d 2e 2f{{.S}}3a 3b 3c 3d 3e 3f{{.S}}4a 4b 4c 4d 4e 4f{{.S}}5a 5b 5c 5d 5e 5f{{.S}}6a 6b 6c 6d 6e 6f{{.S}}7a 7b 7c 7d 7e 7f{{.S}}`
+	templateToFile[`{nf}`] = `0{{.S}}`
+	templateToFile[`{+nf}`] = `0{{.S}}0{{.S}}0{{.S}}0{{.S}}0{{.S}}0{{.S}}0{{.S}}`
+
+	// II. token type placeholders
+	templateToOutput[`{..}`] = templateToOutput[`{}`]
+	templateToOutput[`{1..}`] = templateToOutput[`{}`]
+	templateToOutput[`{..2}`] = `{{.O}}1a 1b{{.O}}`
+	templateToOutput[`{1..2}`] = templateToOutput[`{..2}`]
+	templateToOutput[`{-2..-1}`] = `{{.O}}1e 1f{{.O}}`
+	// shorthand for x..x range
+	templateToOutput[`{1}`] = `{{.O}}1a{{.O}}`
+	templateToOutput[`{1..1}`] = templateToOutput[`{1}`]
+	templateToOutput[`{-6}`] = templateToOutput[`{1}`]
+	// multiple ranges
+	templateToOutput[`{1,2}`] = templateToOutput[`{1..2}`]
+	templateToOutput[`{1,2,4}`] = `{{.O}}1a 1b 1d{{.O}}`
+	templateToOutput[`{1,2..4}`] = `{{.O}}1a 1b 1c 1d{{.O}}`
+	templateToOutput[`{1..2,-4..-3}`] = `{{.O}}1a 1b 1c 1d{{.O}}`
+	// flags
+	templateToOutput[`{+1}`] = `{{.O}}1a{{.O}} {{.O}}2a{{.O}} {{.O}}3a{{.O}} {{.O}}4a{{.O}} {{.O}}5a{{.O}} {{.O}}6a{{.O}} {{.O}}7a{{.O}}`
+	templateToOutput[`{+-1}`] = `{{.O}}1f{{.O}} {{.O}}2f{{.O}} {{.O}}3f{{.O}} {{.O}}4f{{.O}} {{.O}}5f{{.O}} {{.O}}6f{{.O}} {{.O}}7f{{.O}}`
+	templateToOutput[`{s1}`] = `{{.O}}1a {{.O}}`
+	templateToFile[`{f1}`] = `1a{{.S}}`
+	templateToOutput[`{+s1..2}`] = `{{.O}}1a 1b {{.O}} {{.O}}2a 2b {{.O}} {{.O}}3a 3b {{.O}} {{.O}}4a 4b {{.O}} {{.O}}5a 5b {{.O}} {{.O}}6a 6b {{.O}} {{.O}}7a 7b {{.O}}`
+	templateToFile[`{+sf1..2}`] = `1a 1b {{.S}}2a 2b {{.S}}3a 3b {{.S}}4a 4b {{.S}}5a 5b {{.S}}6a 6b {{.S}}7a 7b {{.S}}`
+
+	// III. query type placeholder
+	// query flag is not removed after parsing, so it gets doubled
+	// while the double q is invalid, it is useful here for testing purposes
+	templateToOutput[`{q}`] = "{{.O}}" + query + "{{.O}}"
+	templateToOutput[`{fzf:query}`] = "{{.O}}" + query + "{{.O}}"
+	templateToOutput[`{fzf:action} {fzf:prompt}`] = "backward-delete-char-eof 'prompt'"
+
+	// IV. escaping placeholder
+	templateToOutput[`\{}`] = `{}`
+	templateToOutput[`\{q}`] = `{q}`
+	templateToOutput[`\{fzf:query}`] = `{fzf:query}`
+	templateToOutput[`\{fzf:action}`] = `{fzf:action}`
+	templateToOutput[`\{++}`] = `{++}`
+	templateToOutput[`{++}`] = templateToOutput[`{+}`]
+
+	for giveTemplate, wantOutput := range templateToOutput {
+		result = replacePlaceholderTest(giveTemplate, stripAnsi, Delimiter{}, printsep, forcePlus, query, items3)
+		checkFormat(wantOutput)
+	}
+	for giveTemplate, wantOutput := range templateToFile {
+		path := replacePlaceholderTest(giveTemplate, stripAnsi, Delimiter{}, printsep, forcePlus, query, items3)
+
+		data, err := readFile(path)
+		if err != nil {
+			t.Errorf("Cannot read the content of the temp file %s.", path)
+		}
+		result = string(data)
+
+		checkFormat(wantOutput)
+	}
+}
+
+func TestQuoteEntry(t *testing.T) {
+	type quotes struct{ E, O, SQ, DQ, BS string } // standalone escape, outer, single and double quotes, backslash
+	unixStyle := quotes{``, `'`, `'\''`, `"`, `\`}
+	windowsStyle := quotes{`^`, `^"`, `'`, `\^"`, `\\`}
+	var effectiveStyle quotes
+	exec := util.NewExecutor("")
+
+	if util.IsWindows() {
+		effectiveStyle = windowsStyle
+	} else {
+		effectiveStyle = unixStyle
+	}
+
+	tests := map[string]string{
+		`'`:     `{{.O}}{{.SQ}}{{.O}}`,
+		`"`:     `{{.O}}{{.DQ}}{{.O}}`,
+		`\`:     `{{.O}}{{.BS}}{{.O}}`,
+		`\"`:    `{{.O}}{{.BS}}{{.DQ}}{{.O}}`,
+		`"\\\"`: `{{.O}}{{.DQ}}{{.BS}}{{.BS}}{{.BS}}{{.DQ}}{{.O}}`,
+
+		`$`:       `{{.O}}${{.O}}`,
+		`$HOME`:   `{{.O}}$HOME{{.O}}`,
+		`'$HOME'`: `{{.O}}{{.SQ}}$HOME{{.SQ}}{{.O}}`,
+
+		`&`:                       `{{.O}}{{.E}}&{{.O}}`,
+		`|`:                       `{{.O}}{{.E}}|{{.O}}`,
+		`<`:                       `{{.O}}{{.E}}<{{.O}}`,
+		`>`:                       `{{.O}}{{.E}}>{{.O}}`,
+		`(`:                       `{{.O}}{{.E}}({{.O}}`,
+		`)`:                       `{{.O}}{{.E}}){{.O}}`,
+		`@`:                       `{{.O}}{{.E}}@{{.O}}`,
+		`^`:                       `{{.O}}{{.E}}^{{.O}}`,
+		`%`:                       `{{.O}}{{.E}}%{{.O}}`,
+		`!`:                       `{{.O}}{{.E}}!{{.O}}`,
+		`%USERPROFILE%`:           `{{.O}}{{.E}}%USERPROFILE{{.E}}%{{.O}}`,
+		`C:\Program Files (x86)\`: `{{.O}}C:{{.BS}}Program Files {{.E}}(x86{{.E}}){{.BS}}{{.O}}`,
+		`"C:\Program Files"`:      `{{.O}}{{.DQ}}C:{{.BS}}Program Files{{.DQ}}{{.O}}`,
+	}
+
+	for input, expected := range tests {
+		escaped := exec.QuoteEntry(input)
+		expected = templateToString(expected, effectiveStyle)
+		if escaped != expected {
+			t.Errorf("Input: %s, expected: %s, actual %s", input, expected, escaped)
+		}
+	}
+}
+
+// purpose of this test is to demonstrate some shortcomings of fzf's templating system on Unix
+func TestUnixCommands(t *testing.T) {
+	if util.IsWindows() {
+		t.SkipNow()
+	}
+	tests := []testCase{
+		// reference: give{template, query, items}, want{output OR match}
+
+		// 1) working examples
+
+		// paths that does not have to evaluated will work fine, when quoted
+		{give{`grep foo {}`, ``, newItems(`test`)}, want{output: `grep foo 'test'`}},
+		{give{`grep foo {}`, ``, newItems(`/home/user/test`)}, want{output: `grep foo '/home/user/test'`}},
+		{give{`grep foo {}`, ``, newItems(`./test`)}, want{output: `grep foo './test'`}},
+
+		// only placeholders are escaped as data, this will lookup tilde character in a test file in your home directory
+		// quoting the tilde is required (to be treated as string)
+		{give{`grep {} ~/test`, ``, newItems(`~`)}, want{output: `grep '~' ~/test`}},
+
+		// 2) problematic examples
+		// (not necessarily unexpected)
+
+		// paths that need to expand some part of it won't work (special characters and variables)
+		{give{`cat {}`, ``, newItems(`~/test`)}, want{output: `cat '~/test'`}},
+		{give{`cat {}`, ``, newItems(`$HOME/test`)}, want{output: `cat '$HOME/test'`}},
+	}
+	testCommands(t, tests)
+}
+
+// purpose of this test is to demonstrate some shortcomings of fzf's templating system on Windows
+func TestWindowsCommands(t *testing.T) {
+	// XXX Deprecated
+	t.SkipNow()
+
+	tests := []testCase{
+		// reference: give{template, query, items}, want{output OR match}
+
+		// 1) working examples
+
+		// example of redundantly escaped backslash in the output, besides looking bit ugly, it won't cause any issue
+		{give{`type {}`, ``, newItems(`C:\test.txt`)}, want{output: `type ^"C:\\test.txt^"`}},
+		{give{`rg -- "package" {}`, ``, newItems(`.\test.go`)}, want{output: `rg -- "package" ^".\\test.go^"`}},
+		// example of mandatorily escaped backslash in the output, otherwise `rg -- "C:\test.txt"` is matching for tabulator
+		{give{`rg -- {}`, ``, newItems(`C:\test.txt`)}, want{output: `rg -- ^"C:\\test.txt^"`}},
+		// example of mandatorily escaped double quote in the output, otherwise `rg -- ""C:\\test.txt""` is not matching for the double quotes around the path
+		{give{`rg -- {}`, ``, newItems(`"C:\test.txt"`)}, want{output: `rg -- ^"\^"C:\\test.txt\^"^"`}},
+
+		// 2) problematic examples
+		// (not necessarily unexpected)
+
+		// notepad++'s parser can't handle `-n"12"` generate by fzf, expects `-n12`
+		{give{`notepad++ -n{1} {2}`, ``, newItems(`12	C:\Work\Test Folder\File.txt`)}, want{output: `notepad++ -n^"12^" ^"C:\\Work\\Test Folder\\File.txt^"`}},
+
+		// cat is parsing `\"` as a part of the file path, double quote is illegal character for paths on Windows
+		// cat: "C:\\test.txt: Invalid argument
+		{give{`cat {}`, ``, newItems(`"C:\test.txt"`)}, want{output: `cat ^"\^"C:\\test.txt\^"^"`}},
+		// cat: "C:\\test.txt": Invalid argument
+		{give{`cmd /c {}`, ``, newItems(`cat "C:\test.txt"`)}, want{output: `cmd /c ^"cat \^"C:\\test.txt\^"^"`}},
+
+		// the "file" flag in the pattern won't create *.bat or *.cmd file so the command in the output tries to edit the file, instead of executing it
+		// the temp file contains: `cat "C:\test.txt"`
+		// TODO this should actually work
+		{give{`cmd /c {f}`, ``, newItems(`cat "C:\test.txt"`)}, want{match: `^cmd /c .*\fzf-preview-[0-9]{9}$`}},
+	}
+	testCommands(t, tests)
+}
+
+// purpose of this test is to demonstrate some shortcomings of fzf's templating system on Windows in Powershell
+func TestPowershellCommands(t *testing.T) {
+	if !util.IsWindows() {
+		t.SkipNow()
+	}
+
+	tests := []testCase{
+		// reference: give{template, query, items}, want{output OR match}
+
+		/*
+			You can read each line in the following table as a pipeline that
+			consist of series of parsers that act upon your input (col. 1) and
+			each cell represents the output value.
+
+			For example:
+			 - exec.Command("program.exe", `\''`)
+			   - goes to win32 api which will process it transparently as it contains no special characters, see [CommandLineToArgvW][].
+			     - powershell command will receive it as is, that is two arguments: a literal backslash and empty string in single quotes
+			     - native command run via/from powershell will receive only one argument: a literal backslash. Because extra parsing rules apply, see [NativeCallsFromPowershell][].
+			       - some¹ apps have internal parser, that requires one more level of escaping (yes, this is completely application-specific, but see terminal_test.go#TestWindowsCommands)
+
+			Character⁰   CommandLineToArgvW   Powershell commands              Native commands from Powershell   Apps requiring escapes¹    | Being tested below
+			----------   ------------------   ------------------------------   -------------------------------   -------------------------- | ------------------
+			"            empty string²        missing argument error           ...                               ...                        |
+			\"           literal "            unbalanced quote error           ...                               ...                        |
+			'\"'         literal '"'          literal "                        empty string                      empty string (match all)   | yes
+			'\\\"'       literal '\"'         literal \"                       literal "                         literal "                  |
+			----------   ------------------   ------------------------------   -------------------------------   -------------------------- | ------------------
+			\            transparent          transparent                      transparent                       regex error                |
+			'\'          transparent          literal \                        literal \                         regex error                | yes
+			\\           transparent          transparent                      transparent                       literal \                  |
+			'\\'         transparent          literal \\                       literal \\                        literal \                  |
+			----------   ------------------   ------------------------------   -------------------------------   -------------------------- | ------------------
+			'            transparent          unbalanced quote error           ...                               ...                        |
+			\'           transparent          literal \ and unb. quote error   ...                               ...                        |
+			\''          transparent          literal \ and empty string       literal \                         regex error                | no, but given as example above
+			'''          transparent          unbalanced quote error           ...                               ...                        |
+			''''         transparent          literal '                        literal '                         literal '                  | yes
+			----------   ------------------   ------------------------------   -------------------------------   -------------------------- | ------------------
+
+			⁰: charatecter or characters 'x' as an argument to a program in go's call: exec.Command("program.exe", `x`)
+			¹: native commands like grep, git grep, ripgrep
+			²: interpreted as a grouping quote, affects argument parser and gets removed from the result
+
+			[CommandLineToArgvW]: https://docs.microsoft.com/en-gb/windows/win32/api/shellapi/nf-shellapi-commandlinetoargvw#remarks
+			[NativeCallsFromPowershell]: https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_parsing?view=powershell-7.1#passing-arguments-that-contain-quote-characters
+		*/
+
+		// 1) working examples
+
+		{give{`Get-Content {}`, ``, newItems(`C:\test.txt`)}, want{output: `Get-Content 'C:\test.txt'`}},
+		{give{`rg -- "package" {}`, ``, newItems(`.\test.go`)}, want{output: `rg -- "package" '.\test.go'`}},
+
+		// example of escaping single quotes
+		{give{`rg -- {}`, ``, newItems(`'foobar'`)}, want{output: `rg -- '''foobar'''`}},
+
+		// chaining powershells
+		{give{`powershell -NoProfile -Command {}`, ``, newItems(`cat "C:\test.txt"`)}, want{output: `powershell -NoProfile -Command 'cat \"C:\test.txt\"'`}},
+
+		// 2) problematic examples
+		// (not necessarily unexpected)
+
+		// looking for a path string will only work with escaped backslashes
+		{give{`rg -- {}`, ``, newItems(`C:\test.txt`)}, want{output: `rg -- 'C:\test.txt'`}},
+		// looking for a literal double quote will only work with triple escaped double quotes
+		{give{`rg -- {}`, ``, newItems(`"C:\test.txt"`)}, want{output: `rg -- '\"C:\test.txt\"'`}},
+
+		// Get-Content (i.e. cat alias) is parsing `"` as a part of the file path, returns an error:
+		// Get-Content : Cannot find drive. A drive with the name '"C:' does not exist.
+		{give{`cat {}`, ``, newItems(`"C:\test.txt"`)}, want{output: `cat '\"C:\test.txt\"'`}},
+
+		// the "file" flag in the pattern won't create *.ps1 file so the powershell will offload this "unknown" filetype
+		// to explorer, which will prompt user to pick editing program for the fzf-preview file
+		// the temp file contains: `cat "C:\test.txt"`
+		// TODO this should actually work
+		{give{`powershell -NoProfile -Command {f}`, ``, newItems(`cat "C:\test.txt"`)}, want{match: `^powershell -NoProfile -Command .*\fzf-preview-[0-9]{9}$`}},
+	}
+
+	// to force powershell-style escaping we temporarily set environment variable that fzf honors
+	shellBackup := os.Getenv("SHELL")
+	os.Setenv("SHELL", "powershell")
+	testCommands(t, tests)
+	os.Setenv("SHELL", shellBackup)
+}
+
+/*
+Test typical valid placeholders and parsing of them.
+
+Also since the parser assumes the input is matched with `placeholder` regex,
+the regex is tested here as well.
+*/
+func TestParsePlaceholder(t *testing.T) {
+	// give, want pairs
+	templates := map[string]string{
+		// I. item type placeholder
+		`{}`:    `{}`,
+		`{+}`:   `{+}`,
+		`{n}`:   `{n}`,
+		`{+n}`:  `{+n}`,
+		`{f}`:   `{f}`,
+		`{+nf}`: `{+nf}`,
+
+		// II. token type placeholders
+		`{..}`:     `{..}`,
+		`{1..}`:    `{1..}`,
+		`{..2}`:    `{..2}`,
+		`{1..2}`:   `{1..2}`,
+		`{-2..-1}`: `{-2..-1}`,
+		// shorthand for x..x range
+		`{1}`:    `{1}`,
+		`{1..1}`: `{1..1}`,
+		`{-6}`:   `{-6}`,
+		// multiple ranges
+		`{1,2}`:         `{1,2}`,
+		`{1,2,4}`:       `{1,2,4}`,
+		`{1,2..4}`:      `{1,2..4}`,
+		`{1..2,-4..-3}`: `{1..2,-4..-3}`,
+		// flags
+		`{+1}`:      `{+1}`,
+		`{+-1}`:     `{+-1}`,
+		`{s1}`:      `{s1}`,
+		`{f1}`:      `{f1}`,
+		`{+s1..2}`:  `{+s1..2}`,
+		`{+sf1..2}`: `{+sf1..2}`,
+
+		// III. query type placeholder
+		// query flag is not removed after parsing, so it gets doubled
+		// while the double q is invalid, it is useful here for testing purposes
+		`{q}`:        `{qq}`,
+		`{q:1}`:      `{qq:1}`,
+		`{q:2..}`:    `{qq:2..}`,
+		`{q:..}`:     `{qq:..}`,
+		`{q:2..-1}`:  `{qq:2..-1}`,
+		`{q:s2..-1}`: `{sqq:2..-1}`, // FIXME
+
+		// IV. escaping placeholder
+		`\{}`:   `{}`,
+		`\{++}`: `{++}`,
+		`{++}`:  `{+}`,
+	}
+
+	for giveTemplate, wantTemplate := range templates {
+		if !placeholder.MatchString(giveTemplate) {
+			t.Errorf(`given placeholder %s does not match placeholder regex, so attempt to parse it is unexpected`, giveTemplate)
+			continue
+		}
+
+		_, placeholderWithoutFlags, flags := parsePlaceholder(giveTemplate)
+		gotTemplate := placeholderWithoutFlags[:1] + flags.encodePlaceholder() + placeholderWithoutFlags[1:]
+
+		if gotTemplate != wantTemplate {
+			t.Errorf(`parsed placeholder "%s" into "%s", but want "%s"`, giveTemplate, gotTemplate, wantTemplate)
+		}
+	}
+}
+
+func TestExtractPassthroughs(t *testing.T) {
+	for _, middle := range []string{
+		"\x1bPtmux;\x1b\x1bbar\x1b\\",
+		"\x1bPtmux;\x1b\x1bbar\x1bbar\x1b\\",
+		"\x1b]1337;bar\x1b\\",
+		"\x1b]1337;bar\x1bbar\x1b\\",
+		"\x1b]1337;bar\a",
+		"\x1b_Ga=T,f=32,s=1258,v=1295,c=74,r=35,m=1\x1b\\",
+		"\x1b_Ga=T,f=32,s=1258,v=1295,c=74,r=35,m=1\x1b\\\r",
+		"\x1b_Ga=T,f=32,s=1258,v=1295,c=74,r=35,m=1\x1bbar\x1b\\\r",
+		"\x1b_Gm=1;AAAAAAAAA=\x1b\\",
+		"\x1b_Gm=1;AAAAAAAAA=\x1b\\\r",
+		"\x1b_Gm=1;\x1bAAAAAAAAA=\x1b\\\r",
+	} {
+		line := "foo" + middle + "baz"
+		loc := findPassThrough(line)
+		if loc == nil || line[0:loc[0]] != "foo" || line[loc[1]:] != "baz" {
+			t.Error("failed to find passthrough")
+		}
+		garbage := "\x1bPtmux;\x1b]1337;\x1b_Ga=\x1b]1337;bar\x1b."
+		line = strings.Repeat("foo"+middle+middle+"baz", 3) + garbage
+		passthroughs, result := extractPassThroughs(line)
+		if result != "foobazfoobazfoobaz"+garbage || len(passthroughs) != 6 {
+			t.Error("failed to extract passthroughs")
+		}
+	}
+}
+
+/* utilities section */
+
+// Item represents one line in fzf UI. Usually it is relative path to files and folders.
+func newItem(str string) *Item {
+	bytes := []byte(str)
+	trimmed, _, _ := extractColor(str, nil, nil)
+	return &Item{origText: &bytes, text: util.ToChars([]byte(trimmed))}
+}
+
+// Functions tested in this file require array of items (allItems). The array needs
+// to consist of at least two nils. This is helper function.
+func newItems(str ...string) []*Item {
+	result := make([]*Item, util.Max(len(str), 2))
+	for i, s := range str {
+		result[i] = newItem(s)
+	}
+	return result
+}
+
+// (for logging purposes)
+func (item *Item) String() string {
+	return item.AsString(true)
+}
+
+// Helper function to parse, execute and convert "text/template" to string. Panics on error.
+func templateToString(format string, data any) string {
+	bb := &bytes.Buffer{}
+
+	err := template.Must(template.New("").Parse(format)).Execute(bb, data)
+	if err != nil {
+		panic(err)
+	}
+
+	return bb.String()
+}
+
+// ad hoc types for test cases
+type give struct {
+	template string
+	query    string
+	allItems []*Item
+}
+type want struct {
+	/*
+		Unix:
+		The `want.output` string is supposed to be formatted for evaluation by
+		`sh -c command` system call.
+
+		Windows:
+		The `want.output` string is supposed to be formatted for evaluation by
+		`cmd.exe /s /c "command"` system call. The `/s` switch enables so called old
+		behaviour, which is more favourable for nesting (possibly escaped)
+		special characters. This is the relevant section of `help cmd`:
+
+		...old behavior is to see if the first character is
+		a quote character and if so, strip the leading character and
+		remove the last quote character on the command line, preserving
+		any text after the last quote character.
+	*/
+	output string // literal output
+	match  string // output is matched against this regex (when output is empty string)
+}
+type testCase struct {
+	give
+	want
+}
+
+func testCommands(t *testing.T, tests []testCase) {
+	// common test parameters
+	delim := "\t"
+	delimiter := Delimiter{str: &delim}
+	printsep := ""
+	stripAnsi := false
+	forcePlus := false
+
+	// evaluate the test cases
+	for idx, test := range tests {
+		gotOutput := replacePlaceholderTest(
+			test.give.template, stripAnsi, delimiter, printsep, forcePlus,
+			test.give.query,
+			test.give.allItems)
+		switch {
+		case test.want.output != "":
+			if gotOutput != test.want.output {
+				t.Errorf("tests[%v]:\ngave{\n\ttemplate: '%s',\n\tquery: '%s',\n\tallItems: %s}\nand got '%s',\nbut want '%s'",
+					idx,
+					test.give.template, test.give.query, test.give.allItems,
+					gotOutput, test.want.output)
+			}
+		case test.want.match != "":
+			wantMatch := strings.ReplaceAll(test.want.match, `\`, `\\`)
+			wantRegex := regexp.MustCompile(wantMatch)
+			if !wantRegex.MatchString(gotOutput) {
+				t.Errorf("tests[%v]:\ngave{\n\ttemplate: '%s',\n\tquery: '%s',\n\tallItems: %s}\nand got '%s',\nbut want '%s'",
+					idx,
+					test.give.template, test.give.query, test.give.allItems,
+					gotOutput, test.want.match)
+			}
+		default:
+			t.Errorf("tests[%v]: test case does not describe 'want' property", idx)
+		}
+	}
+}
+
+// naive encoder of placeholder flags
+func (flags placeholderFlags) encodePlaceholder() string {
+	encoded := ""
+	if flags.plus {
+		encoded += "+"
+	}
+	if flags.preserveSpace {
+		encoded += "s"
+	}
+	if flags.number {
+		encoded += "n"
+	}
+	if flags.file {
+		encoded += "f"
+	}
+	if flags.forceUpdate { // FIXME
+		encoded += "q"
+	}
+	return encoded
+}
+
+// can be replaced with os.ReadFile() in go 1.16+
+func readFile(path string) ([]byte, error) {
+	file, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	data := make([]byte, 0, 128)
+	for {
+		if len(data) >= cap(data) {
+			d := append(data[:cap(data)], 0)
+			data = d[:len(data)]
+		}
+
+		n, err := file.Read(data[len(data):cap(data)])
+		data = data[:len(data)+n]
+		if err != nil {
+			if err == io.EOF {
+				err = nil
+			}
+			return data, err
+		}
+	}
 }

src/terminal_unix.go

@@ -1,4 +1,4 @@
-// +build !windows
+//go:build !windows
 
 package fzf
 
@@ -6,8 +6,19 @@ import (
 	"os"
 	"os/signal"
 	"syscall"
+
+	"golang.org/x/sys/unix"
 )
 
 func notifyOnResize(resizeChan chan<- os.Signal) {
 	signal.Notify(resizeChan, syscall.SIGWINCH)
 }
+
+func notifyStop(p *os.Process) {
+	pid := p.Pid
+	pgid, err := unix.Getpgid(pid)
+	if err == nil {
+		pid = pgid * -1
+	}
+	unix.Kill(pid, syscall.SIGTSTP)
+}

src/terminal_windows.go

@@ -1,4 +1,4 @@
-// +build windows
+//go:build windows
 
 package fzf
 
@@ -9,3 +9,7 @@ import (
 func notifyOnResize(resizeChan chan<- os.Signal) {
 	// TODO
 }
+
+func notifyStop(p *os.Process) {
+	// NOOP
+}

src/tmux.go

@@ -0,0 +1,68 @@
+package fzf
+
+import (
+	"os"
+	"os/exec"
+
+	"github.com/junegunn/fzf/src/tui"
+)
+
+func runTmux(args []string, opts *Options) (int, error) {
+	// Prepare arguments
+	fzf, rest := args[0], args[1:]
+	args = []string{"--bind=ctrl-z:ignore"}
+	if !opts.Tmux.border && opts.BorderShape == tui.BorderUndefined {
+		// We append --border option at the end, because `--style=full:STYLE`
+		// may have changed the default border style.
+		rest = append(rest, "--border")
+	}
+	if opts.Tmux.border && opts.Margin == defaultMargin() {
+		args = append(args, "--margin=0,1")
+	}
+	argStr := escapeSingleQuote(fzf)
+	for _, arg := range append(args, rest...) {
+		argStr += " " + escapeSingleQuote(arg)
+	}
+	argStr += ` --no-tmux --no-height`
+
+	// Get current directory
+	dir, err := os.Getwd()
+	if err != nil {
+		dir = "."
+	}
+
+	// Set tmux options for popup placement
+	// C        Both    The centre of the terminal
+	// R        -x      The right side of the terminal
+	// P        Both    The bottom left of the pane
+	// M        Both    The mouse position
+	// W        Both    The window position on the status line
+	// S        -y      The line above or below the status line
+	tmuxArgs := []string{"display-popup", "-E", "-d", dir}
+	if !opts.Tmux.border {
+		tmuxArgs = append(tmuxArgs, "-B")
+	}
+	switch opts.Tmux.position {
+	case posUp:
+		tmuxArgs = append(tmuxArgs, "-xC", "-y0")
+	case posDown:
+		tmuxArgs = append(tmuxArgs, "-xC", "-y9999")
+	case posLeft:
+		tmuxArgs = append(tmuxArgs, "-x0", "-yC")
+	case posRight:
+		tmuxArgs = append(tmuxArgs, "-xR", "-yC")
+	case posCenter:
+		tmuxArgs = append(tmuxArgs, "-xC", "-yC")
+	}
+	tmuxArgs = append(tmuxArgs, "-w"+opts.Tmux.width.String())
+	tmuxArgs = append(tmuxArgs, "-h"+opts.Tmux.height.String())
+
+	return runProxy(argStr, func(temp string, needBash bool) (*exec.Cmd, error) {
+		sh, err := sh(needBash)
+		if err != nil {
+			return nil, err
+		}
+		tmuxArgs = append(tmuxArgs, sh, temp)
+		return exec.Command("tmux", tmuxArgs...), nil
+	}, opts, true)
+}

src/tokenizer.go

@@ -1,9 +1,12 @@
 package fzf
 
 import (
+	"bytes"
+	"fmt"
 	"regexp"
 	"strconv"
 	"strings"
+	"unicode"
 
 	"github.com/junegunn/fzf/src/util"
 )
@@ -16,11 +19,57 @@ type Range struct {
 	end   int
 }
 
+func (r Range) IsFull() bool {
+	return r.begin == rangeEllipsis && r.end == rangeEllipsis
+}
+
+func compareRanges(r1 []Range, r2 []Range) bool {
+	if len(r1) != len(r2) {
+		return false
+	}
+	for idx := range r1 {
+		if r1[idx] != r2[idx] {
+			return false
+		}
+	}
+	return true
+}
+
+func RangesToString(ranges []Range) string {
+	strs := []string{}
+	for _, r := range ranges {
+		s := ""
+		if r.begin == rangeEllipsis && r.end == rangeEllipsis {
+			s = ".."
+		} else if r.begin == r.end {
+			s = strconv.Itoa(r.begin)
+		} else {
+			if r.begin != rangeEllipsis {
+				s += strconv.Itoa(r.begin)
+			}
+
+			if r.begin != -1 {
+				s += ".."
+				if r.end != rangeEllipsis {
+					s += strconv.Itoa(r.end)
+				}
+			}
+		}
+		strs = append(strs, s)
+	}
+
+	return strings.Join(strs, ",")
+}
+
 // Token contains the tokenized part of the strings and its prefix length
 type Token struct {
 	text         *util.Chars
 	prefixLength int32
-	trimLength   int32
+}
+
+// String returns the string representation of a Token.
+func (t Token) String() string {
+	return fmt.Sprintf("Token{text: %s, prefixLength: %d}", t.text, t.prefixLength)
 }
 
 // Delimiter for tokenizing the input
@@ -29,8 +78,18 @@ type Delimiter struct {
 	str   *string
 }
 
+// IsAwk returns true if the delimiter is an AWK-style delimiter
+func (d Delimiter) IsAwk() bool {
+	return d.regex == nil && d.str == nil
+}
+
+// String returns the string representation of a Delimiter.
+func (d Delimiter) String() string {
+	return fmt.Sprintf("Delimiter{regex: %v, str: &%q}", d.regex, *d.str)
+}
+
 func newRange(begin int, end int) Range {
-	if begin == 1 {
+	if begin == 1 && end != 1 {
 		begin = rangeEllipsis
 	}
 	if end == -1 {
@@ -62,7 +121,7 @@ func ParseRange(str *string) (Range, bool) {
 		}
 		begin, err1 := strconv.Atoi(ns[0])
 		end, err2 := strconv.Atoi(ns[1])
-		if err1 != nil || err2 != nil || begin == 0 || end == 0 {
+		if err1 != nil || err2 != nil || begin == 0 || end == 0 || begin < 0 && end > 0 {
 			return Range{}, false
 		}
 		return newRange(begin, end), true
@@ -75,14 +134,14 @@ func ParseRange(str *string) (Range, bool) {
 	return newRange(n, n), true
 }
 
-func withPrefixLengths(tokens []util.Chars, begin int) []Token {
+func withPrefixLengths(tokens []string, begin int) []Token {
 	ret := make([]Token, len(tokens))
 
 	prefixLength := begin
-	for idx, token := range tokens {
-		// NOTE: &tokens[idx] instead of &tokens
-		ret[idx] = Token{&tokens[idx], int32(prefixLength), int32(token.TrimLength())}
-		prefixLength += token.Length()
+	for idx := range tokens {
+		chars := util.ToChars(stringBytes(tokens[idx]))
+		ret[idx] = Token{&chars, int32(prefixLength)}
+		prefixLength += chars.Length()
 	}
 	return ret
 }
@@ -93,16 +152,15 @@ const (
 	awkWhite
 )
 
-func awkTokenizer(input util.Chars) ([]util.Chars, int) {
+func awkTokenizer(input string) ([]string, int) {
 	// 9, 32
-	ret := []util.Chars{}
+	ret := []string{}
 	prefixLength := 0
 	state := awkNil
-	numChars := input.Length()
 	begin := 0
 	end := 0
-	for idx := 0; idx < numChars; idx++ {
-		r := input.Get(idx)
+	for idx := 0; idx < len(input); idx++ {
+		r := input[idx]
 		white := r == 9 || r == 32
 		switch state {
 		case awkNil:
@@ -120,19 +178,19 @@ func awkTokenizer(input util.Chars) ([]util.Chars, int) {
 			if white {
 				end = idx + 1
 			} else {
-				ret = append(ret, input.Slice(begin, end))
+				ret = append(ret, input[begin:end])
 				state, begin, end = awkBlack, idx, idx+1
 			}
 		}
 	}
 	if begin < end {
-		ret = append(ret, input.Slice(begin, end))
+		ret = append(ret, input[begin:end])
 	}
 	return ret, prefixLength
 }
 
 // Tokenize tokenizes the given string with the delimiter
-func Tokenize(text util.Chars, delimiter Delimiter) []Token {
+func Tokenize(text string, delimiter Delimiter) []Token {
 	if delimiter.str == nil && delimiter.regex == nil {
 		// AWK-style (\S+\s*)
 		tokens, prefixLength := awkTokenizer(text)
@@ -140,36 +198,48 @@ func Tokenize(text util.Chars, delimiter Delimiter) []Token {
 	}
 
 	if delimiter.str != nil {
-		return withPrefixLengths(text.Split(*delimiter.str), 0)
+		return withPrefixLengths(strings.SplitAfter(text, *delimiter.str), 0)
 	}
 
 	// FIXME performance
 	var tokens []string
 	if delimiter.regex != nil {
-		str := text.ToString()
-		for len(str) > 0 {
-			loc := delimiter.regex.FindStringIndex(str)
-			if loc == nil {
-				loc = []int{0, len(str)}
-			}
-			last := util.Max(loc[1], 1)
-			tokens = append(tokens, str[:last])
-			str = str[last:]
+		locs := delimiter.regex.FindAllStringIndex(text, -1)
+		begin := 0
+		for _, loc := range locs {
+			tokens = append(tokens, text[begin:loc[1]])
+			begin = loc[1]
+		}
+		if begin < len(text) {
+			tokens = append(tokens, text[begin:])
 		}
 	}
-	asRunes := make([]util.Chars, len(tokens))
-	for i, token := range tokens {
-		asRunes[i] = util.RunesToChars([]rune(token))
-	}
-	return withPrefixLengths(asRunes, 0)
+	return withPrefixLengths(tokens, 0)
 }
 
-func joinTokens(tokens []Token) []rune {
-	ret := []rune{}
-	for _, token := range tokens {
-		ret = append(ret, token.text.ToRunes()...)
+// StripLastDelimiter removes the trailing delimiter and whitespaces
+func StripLastDelimiter(str string, delimiter Delimiter) string {
+	if delimiter.str != nil {
+		str = strings.TrimSuffix(str, *delimiter.str)
+	} else if delimiter.regex != nil {
+		locs := delimiter.regex.FindAllStringIndex(str, -1)
+		if len(locs) > 0 {
+			lastLoc := locs[len(locs)-1]
+			if lastLoc[1] == len(str) {
+				str = str[:lastLoc[0]]
+			}
+		}
 	}
-	return ret
+	return strings.TrimRightFunc(str, unicode.IsSpace)
+}
+
+// JoinTokens concatenates the tokens into a single string
+func JoinTokens(tokens []Token) string {
+	var output bytes.Buffer
+	for _, token := range tokens {
+		output.WriteString(token.text.ToString())
+	}
+	return output.String()
 }
 
 // Transform is used to transform the input when --with-nth option is given
@@ -182,7 +252,7 @@ func Transform(tokens []Token, withNth []Range) []Token {
 		if r.begin == r.end {
 			idx := r.begin
 			if idx == rangeEllipsis {
-				chars := util.RunesToChars(joinTokens(tokens))
+				chars := util.ToChars(stringBytes(JoinTokens(tokens)))
 				parts = append(parts, &chars)
 			} else {
 				if idx < 0 {
@@ -225,15 +295,15 @@ func Transform(tokens []Token, withNth []Range) []Token {
 		var merged util.Chars
 		switch len(parts) {
 		case 0:
-			merged = util.RunesToChars([]rune{})
+			merged = util.ToChars([]byte{})
 		case 1:
 			merged = *parts[0]
 		default:
-			runes := []rune{}
+			var output bytes.Buffer
 			for _, part := range parts {
-				runes = append(runes, part.ToRunes()...)
+				output.WriteString(part.ToString())
 			}
-			merged = util.RunesToChars(runes)
+			merged = util.ToChars(output.Bytes())
 		}
 
 		var prefixLength int32
@@ -242,7 +312,7 @@ func Transform(tokens []Token, withNth []Range) []Token {
 		} else {
 			prefixLength = 0
 		}
-		transTokens[idx] = Token{&merged, prefixLength, int32(merged.TrimLength())}
+		transTokens[idx] = Token{&merged, prefixLength}
 	}
 	return transTokens
 }

src/tokenizer_test.go

@@ -2,8 +2,6 @@ package fzf
 
 import (
 	"testing"
-
-	"github.com/junegunn/fzf/src/util"
 )
 
 func TestParseRange(t *testing.T) {
@@ -11,35 +9,47 @@ func TestParseRange(t *testing.T) {
 		i := ".."
 		r, _ := ParseRange(&i)
 		if r.begin != rangeEllipsis || r.end != rangeEllipsis {
-			t.Errorf("%s", r)
+			t.Errorf("%v", r)
 		}
 	}
 	{
 		i := "3.."
 		r, _ := ParseRange(&i)
 		if r.begin != 3 || r.end != rangeEllipsis {
-			t.Errorf("%s", r)
+			t.Errorf("%v", r)
 		}
 	}
 	{
 		i := "3..5"
 		r, _ := ParseRange(&i)
 		if r.begin != 3 || r.end != 5 {
-			t.Errorf("%s", r)
+			t.Errorf("%v", r)
 		}
 	}
 	{
 		i := "-3..-5"
 		r, _ := ParseRange(&i)
 		if r.begin != -3 || r.end != -5 {
-			t.Errorf("%s", r)
+			t.Errorf("%v", r)
 		}
 	}
 	{
 		i := "3"
 		r, _ := ParseRange(&i)
 		if r.begin != 3 || r.end != 3 {
-			t.Errorf("%s", r)
+			t.Errorf("%v", r)
+		}
+	}
+	{
+		i := "1..3..5"
+		if r, ok := ParseRange(&i); ok {
+			t.Errorf("%v", r)
+		}
+	}
+	{
+		i := "-3..3"
+		if r, ok := ParseRange(&i); ok {
+			t.Errorf("%v", r)
 		}
 	}
 }
@@ -47,23 +57,23 @@ func TestParseRange(t *testing.T) {
 func TestTokenize(t *testing.T) {
 	// AWK-style
 	input := "  abc:  def:  ghi  "
-	tokens := Tokenize(util.RunesToChars([]rune(input)), Delimiter{})
-	if tokens[0].text.ToString() != "abc:  " || tokens[0].prefixLength != 2 || tokens[0].trimLength != 4 {
+	tokens := Tokenize(input, Delimiter{})
+	if tokens[0].text.ToString() != "abc:  " || tokens[0].prefixLength != 2 {
 		t.Errorf("%s", tokens)
 	}
 
 	// With delimiter
-	tokens = Tokenize(util.RunesToChars([]rune(input)), delimiterRegexp(":"))
-	if tokens[0].text.ToString() != "  abc:" || tokens[0].prefixLength != 0 || tokens[0].trimLength != 4 {
-		t.Errorf("%s", tokens)
+	tokens = Tokenize(input, delimiterRegexp(":"))
+	if tokens[0].text.ToString() != "  abc:" || tokens[0].prefixLength != 0 {
+		t.Error(tokens[0].text.ToString(), tokens[0].prefixLength)
 	}
 
 	// With delimiter regex
-	tokens = Tokenize(util.RunesToChars([]rune(input)), delimiterRegexp("\\s+"))
-	if tokens[0].text.ToString() != "  " || tokens[0].prefixLength != 0 || tokens[0].trimLength != 0 ||
-		tokens[1].text.ToString() != "abc:  " || tokens[1].prefixLength != 2 || tokens[1].trimLength != 4 ||
-		tokens[2].text.ToString() != "def:  " || tokens[2].prefixLength != 8 || tokens[2].trimLength != 4 ||
-		tokens[3].text.ToString() != "ghi  " || tokens[3].prefixLength != 14 || tokens[3].trimLength != 3 {
+	tokens = Tokenize(input, delimiterRegexp("\\s+"))
+	if tokens[0].text.ToString() != "  " || tokens[0].prefixLength != 0 ||
+		tokens[1].text.ToString() != "abc:  " || tokens[1].prefixLength != 2 ||
+		tokens[2].text.ToString() != "def:  " || tokens[2].prefixLength != 8 ||
+		tokens[3].text.ToString() != "ghi  " || tokens[3].prefixLength != 14 {
 		t.Errorf("%s", tokens)
 	}
 }
@@ -71,18 +81,18 @@ func TestTokenize(t *testing.T) {
 func TestTransform(t *testing.T) {
 	input := "  abc:  def:  ghi:  jkl"
 	{
-		tokens := Tokenize(util.RunesToChars([]rune(input)), Delimiter{})
+		tokens := Tokenize(input, Delimiter{})
 		{
-			ranges := splitNth("1,2,3")
+			ranges, _ := splitNth("1,2,3")
 			tx := Transform(tokens, ranges)
-			if string(joinTokens(tx)) != "abc:  def:  ghi:  " {
+			if JoinTokens(tx) != "abc:  def:  ghi:  " {
 				t.Errorf("%s", tx)
 			}
 		}
 		{
-			ranges := splitNth("1..2,3,2..,1")
+			ranges, _ := splitNth("1..2,3,2..,1")
 			tx := Transform(tokens, ranges)
-			if string(joinTokens(tx)) != "abc:  def:  ghi:  def:  ghi:  jklabc:  " ||
+			if string(JoinTokens(tx)) != "abc:  def:  ghi:  def:  ghi:  jklabc:  " ||
 				len(tx) != 4 ||
 				tx[0].text.ToString() != "abc:  def:  " || tx[0].prefixLength != 2 ||
 				tx[1].text.ToString() != "ghi:  " || tx[1].prefixLength != 14 ||
@@ -93,11 +103,11 @@ func TestTransform(t *testing.T) {
 		}
 	}
 	{
-		tokens := Tokenize(util.RunesToChars([]rune(input)), delimiterRegexp(":"))
+		tokens := Tokenize(input, delimiterRegexp(":"))
 		{
-			ranges := splitNth("1..2,3,2..,1")
+			ranges, _ := splitNth("1..2,3,2..,1")
 			tx := Transform(tokens, ranges)
-			if string(joinTokens(tx)) != "  abc:  def:  ghi:  def:  ghi:  jkl  abc:" ||
+			if JoinTokens(tx) != "  abc:  def:  ghi:  def:  ghi:  jkl  abc:" ||
 				len(tx) != 4 ||
 				tx[0].text.ToString() != "  abc:  def:" || tx[0].prefixLength != 0 ||
 				tx[1].text.ToString() != "  ghi:" || tx[1].prefixLength != 12 ||
@@ -110,5 +120,6 @@ func TestTransform(t *testing.T) {
 }
 
 func TestTransformIndexOutOfBounds(t *testing.T) {
-	Transform([]Token{}, splitNth("1"))
+	s, _ := splitNth("1")
+	Transform([]Token{}, s)
 }

src/tui/dummy.go

@@ -0,0 +1,63 @@
+//go:build !tcell && !windows
+
+package tui
+
+type Attr int32
+
+func HasFullscreenRenderer() bool {
+	return false
+}
+
+var DefaultBorderShape = BorderRounded
+
+func (a Attr) Merge(b Attr) Attr {
+	if b&AttrRegular > 0 {
+		// Only keep bold attribute set by the system
+		return b | (a & BoldForce)
+	}
+
+	return a | b
+}
+
+const (
+	AttrUndefined = Attr(0)
+	AttrRegular   = Attr(1 << 8)
+	AttrClear     = Attr(1 << 9)
+	BoldForce     = Attr(1 << 10)
+
+	Bold          = Attr(1)
+	Dim           = Attr(1 << 1)
+	Italic        = Attr(1 << 2)
+	Underline     = Attr(1 << 3)
+	Blink         = Attr(1 << 4)
+	Blink2        = Attr(1 << 5)
+	Reverse       = Attr(1 << 6)
+	StrikeThrough = Attr(1 << 7)
+)
+
+func (r *FullscreenRenderer) Init() error                        { return nil }
+func (r *FullscreenRenderer) DefaultTheme() *ColorTheme          { return nil }
+func (r *FullscreenRenderer) Resize(maxHeightFunc func(int) int) {}
+func (r *FullscreenRenderer) Pause(bool)                         {}
+func (r *FullscreenRenderer) Resume(bool, bool)                  {}
+func (r *FullscreenRenderer) PassThrough(string)                 {}
+func (r *FullscreenRenderer) Clear()                             {}
+func (r *FullscreenRenderer) NeedScrollbarRedraw() bool          { return false }
+func (r *FullscreenRenderer) ShouldEmitResizeEvent() bool        { return false }
+func (r *FullscreenRenderer) Bell()                              {}
+func (r *FullscreenRenderer) HideCursor()                        {}
+func (r *FullscreenRenderer) ShowCursor()                        {}
+func (r *FullscreenRenderer) Refresh()                           {}
+func (r *FullscreenRenderer) Close()                             {}
+func (r *FullscreenRenderer) Size() TermSize                     { return TermSize{} }
+
+func (r *FullscreenRenderer) GetChar() Event { return Event{} }
+func (r *FullscreenRenderer) Top() int       { return 0 }
+func (r *FullscreenRenderer) MaxX() int      { return 0 }
+func (r *FullscreenRenderer) MaxY() int      { return 0 }
+
+func (r *FullscreenRenderer) RefreshWindows(windows []Window) {}
+
+func (r *FullscreenRenderer) NewWindow(top int, left int, width int, height int, windowType WindowType, borderStyle BorderStyle, erase bool) Window {
+	return nil
+}

src/tui/eventtype_string.go

@@ -0,0 +1,124 @@
+// Code generated by "stringer -type=EventType"; DO NOT EDIT.
+
+package tui
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[Rune-0]
+	_ = x[CtrlA-1]
+	_ = x[CtrlB-2]
+	_ = x[CtrlC-3]
+	_ = x[CtrlD-4]
+	_ = x[CtrlE-5]
+	_ = x[CtrlF-6]
+	_ = x[CtrlG-7]
+	_ = x[CtrlH-8]
+	_ = x[Tab-9]
+	_ = x[CtrlJ-10]
+	_ = x[CtrlK-11]
+	_ = x[CtrlL-12]
+	_ = x[Enter-13]
+	_ = x[CtrlN-14]
+	_ = x[CtrlO-15]
+	_ = x[CtrlP-16]
+	_ = x[CtrlQ-17]
+	_ = x[CtrlR-18]
+	_ = x[CtrlS-19]
+	_ = x[CtrlT-20]
+	_ = x[CtrlU-21]
+	_ = x[CtrlV-22]
+	_ = x[CtrlW-23]
+	_ = x[CtrlX-24]
+	_ = x[CtrlY-25]
+	_ = x[CtrlZ-26]
+	_ = x[Esc-27]
+	_ = x[CtrlSpace-28]
+	_ = x[CtrlDelete-29]
+	_ = x[CtrlBackSlash-30]
+	_ = x[CtrlRightBracket-31]
+	_ = x[CtrlCaret-32]
+	_ = x[CtrlSlash-33]
+	_ = x[ShiftTab-34]
+	_ = x[Backspace-35]
+	_ = x[Delete-36]
+	_ = x[PageUp-37]
+	_ = x[PageDown-38]
+	_ = x[Up-39]
+	_ = x[Down-40]
+	_ = x[Left-41]
+	_ = x[Right-42]
+	_ = x[Home-43]
+	_ = x[End-44]
+	_ = x[Insert-45]
+	_ = x[ShiftUp-46]
+	_ = x[ShiftDown-47]
+	_ = x[ShiftLeft-48]
+	_ = x[ShiftRight-49]
+	_ = x[ShiftDelete-50]
+	_ = x[F1-51]
+	_ = x[F2-52]
+	_ = x[F3-53]
+	_ = x[F4-54]
+	_ = x[F5-55]
+	_ = x[F6-56]
+	_ = x[F7-57]
+	_ = x[F8-58]
+	_ = x[F9-59]
+	_ = x[F10-60]
+	_ = x[F11-61]
+	_ = x[F12-62]
+	_ = x[AltBackspace-63]
+	_ = x[AltUp-64]
+	_ = x[AltDown-65]
+	_ = x[AltLeft-66]
+	_ = x[AltRight-67]
+	_ = x[AltShiftUp-68]
+	_ = x[AltShiftDown-69]
+	_ = x[AltShiftLeft-70]
+	_ = x[AltShiftRight-71]
+	_ = x[Alt-72]
+	_ = x[CtrlAlt-73]
+	_ = x[Invalid-74]
+	_ = x[Fatal-75]
+	_ = x[BracketedPasteBegin-76]
+	_ = x[BracketedPasteEnd-77]
+	_ = x[Mouse-78]
+	_ = x[DoubleClick-79]
+	_ = x[LeftClick-80]
+	_ = x[RightClick-81]
+	_ = x[SLeftClick-82]
+	_ = x[SRightClick-83]
+	_ = x[ScrollUp-84]
+	_ = x[ScrollDown-85]
+	_ = x[SScrollUp-86]
+	_ = x[SScrollDown-87]
+	_ = x[PreviewScrollUp-88]
+	_ = x[PreviewScrollDown-89]
+	_ = x[Resize-90]
+	_ = x[Change-91]
+	_ = x[BackwardEOF-92]
+	_ = x[Start-93]
+	_ = x[Load-94]
+	_ = x[Focus-95]
+	_ = x[One-96]
+	_ = x[Zero-97]
+	_ = x[Result-98]
+	_ = x[Jump-99]
+	_ = x[JumpCancel-100]
+	_ = x[ClickHeader-101]
+}
+
+const _EventType_name = "RuneCtrlACtrlBCtrlCCtrlDCtrlECtrlFCtrlGCtrlHTabCtrlJCtrlKCtrlLEnterCtrlNCtrlOCtrlPCtrlQCtrlRCtrlSCtrlTCtrlUCtrlVCtrlWCtrlXCtrlYCtrlZEscCtrlSpaceCtrlDeleteCtrlBackSlashCtrlRightBracketCtrlCaretCtrlSlashShiftTabBackspaceDeletePageUpPageDownUpDownLeftRightHomeEndInsertShiftUpShiftDownShiftLeftShiftRightShiftDeleteF1F2F3F4F5F6F7F8F9F10F11F12AltBackspaceAltUpAltDownAltLeftAltRightAltShiftUpAltShiftDownAltShiftLeftAltShiftRightAltCtrlAltInvalidFatalBracketedPasteBeginBracketedPasteEndMouseDoubleClickLeftClickRightClickSLeftClickSRightClickScrollUpScrollDownSScrollUpSScrollDownPreviewScrollUpPreviewScrollDownResizeChangeBackwardEOFStartLoadFocusOneZeroResultJumpJumpCancelClickHeader"
+
+var _EventType_index = [...]uint16{0, 4, 9, 14, 19, 24, 29, 34, 39, 44, 47, 52, 57, 62, 67, 72, 77, 82, 87, 92, 97, 102, 107, 112, 117, 122, 127, 132, 135, 144, 154, 167, 183, 192, 201, 209, 218, 224, 230, 238, 240, 244, 248, 253, 257, 260, 266, 273, 282, 291, 301, 312, 314, 316, 318, 320, 322, 324, 326, 328, 330, 333, 336, 339, 351, 356, 363, 370, 378, 388, 400, 412, 425, 428, 435, 442, 447, 466, 483, 488, 499, 508, 518, 528, 539, 547, 557, 566, 577, 592, 609, 615, 621, 632, 637, 641, 646, 649, 653, 659, 663, 673, 684}
+
+func (i EventType) String() string {
+	if i < 0 || i >= EventType(len(_EventType_index)-1) {
+		return "EventType(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _EventType_name[_EventType_index[i]:_EventType_index[i+1]]
+}