0.56.0

Fixes: https://github.com/junegunn/fzf/issues/4027

.github/ISSUE_TEMPLATE.md

@@ -1,22 +0,0 @@
-<!-- ISSUES NOT FOLLOWING THIS TEMPLATE WILL BE CLOSED AND DELETED -->
-
-<!-- Check all that apply [x] -->
-
-- [ ] I have read through the manual page (`man fzf`)
-- [ ] I have the latest version of fzf
-- [ ] I have searched through the existing issues
-
-## Info
-
-- OS
-    - [ ] Linux
-    - [ ] Mac OS X
-    - [ ] Windows
-    - [ ] Etc.
-- Shell
-    - [ ] bash
-    - [ ] zsh
-    - [ ] fish
-
-## Problem / Steps to reproduce
-

.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/workflows/codeql-analysis.yml

@@ -27,18 +27,18 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@v3
       with:
         languages: ${{ matrix.language }}
 
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
+      uses: github/codeql-action/autobuild@v3
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@v3

.github/workflows/depsreview.yaml

@@ -9,6 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Checkout Repository'
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: 'Dependency Review'
-        uses: actions/dependency-review-action@v3
+        uses: actions/dependency-review-action@v4

.github/workflows/linux.yml

@@ -11,18 +11,21 @@ on:
 permissions:
   contents: read
 
+env:
+  LANG: C.UTF-8
+
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
     - name: Set up Go
-      uses: actions/setup-go@v4
+      uses: actions/setup-go@v5
       with:
-        go-version: 1.19
+        go-version: "1.20"
 
     - name: Setup Ruby
       uses: ruby/setup-ruby@v1
@@ -33,7 +36,7 @@ jobs:
       run: sudo apt-get install --yes zsh fish tmux
 
     - name: Install Ruby gems
-      run: sudo gem install --no-document minitest:5.17.0 rubocop:1.43.0 rubocop-minitest:0.25.1 rubocop-performance:1.15.2
+      run: sudo gem install --no-document minitest:5.25.1 rubocop:1.65.0 rubocop-minitest:0.35.1 rubocop-performance:1.21.1
 
     - name: Rubocop
       run: rubocop --require rubocop-minitest --require rubocop-performance
@@ -42,4 +45,4 @@ jobs:
       run: make test
 
     - name: Integration test
-      run: make install && ./install --all && LC_ALL=C tmux new-session -d && ruby test/test_go.rb --verbose
+      run: make install && ./install --all && tmux new-session -d && ruby test/test_go.rb --verbose

.github/workflows/macos.yml

@@ -15,14 +15,14 @@ jobs:
   build:
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
     - name: Set up Go
-      uses: actions/setup-go@v4
+      uses: actions/setup-go@v5
       with:
-        go-version: 1.18
+        go-version: "1.20"
 
     - name: Setup Ruby
       uses: ruby/setup-ruby@v1

.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

@@ -6,5 +6,5 @@ jobs:
     name: Spell Check with Typos
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: crate-ci/typos@v1.14.10
+    - uses: actions/checkout@v4
+    - uses: crate-ci/typos@v1.26.0

.github/workflows/winget.yml

@@ -5,11 +5,10 @@ on:
 
 jobs:
   publish:
-    runs-on: windows-latest # Action can only run on Windows
+    runs-on: ubuntu-latest
     steps:
       - uses: vedantmgoyal2009/winget-releaser@v2
         with:
           identifier: junegunn.fzf
-          version: ${{ github.event.release.tag_name }}
           installers-regex: '-windows_(armv7|arm64|amd64)\.zip$'
           token: ${{ secrets.WINGET_TOKEN }}

.goreleaser.yml

@@ -1,4 +1,5 @@
 ---
+version: 2
 project_name: fzf
 
 before:
@@ -6,64 +7,9 @@ before:
     - go mod download
 
 builds:
-  - id: fzf-macos
-    binary: fzf
-    goos:
-      - darwin
-    goarch:
-      - amd64
-    ldflags:
-      - "-s -w -X main.version={{ .Version }} -X main.revision={{ .ShortCommit }}"
-    hooks:
-      post: |
-        sh -c '
-        cat > /tmp/fzf-gon-amd64.hcl << EOF
-        source = ["./dist/fzf-macos_darwin_amd64_v1/fzf"]
-        bundle_id = "kr.junegunn.fzf"
-        apple_id {
-          username = "junegunn.c@gmail.com"
-          password = "@env:AC_PASSWORD"
-        }
-        sign {
-          application_identity = "Developer ID Application: Junegunn Choi (Y254DRW44Z)"
-        }
-        zip {
-          output_path = "./dist/fzf-{{ .Version }}-darwin_amd64.zip"
-        }
-        EOF
-        gon /tmp/fzf-gon-amd64.hcl
-        '
-
-  - id: fzf-macos-arm
-    binary: fzf
-    goos:
-      - darwin
-    goarch:
-      - arm64
-    ldflags:
-      - "-s -w -X main.version={{ .Version }} -X main.revision={{ .ShortCommit }}"
-    hooks:
-      post: |
-        sh -c '
-        cat > /tmp/fzf-gon-arm64.hcl << EOF
-        source = ["./dist/fzf-macos-arm_darwin_arm64/fzf"]
-        bundle_id = "kr.junegunn.fzf"
-        apple_id {
-          username = "junegunn.c@gmail.com"
-          password = "@env:AC_PASSWORD"
-        }
-        sign {
-          application_identity = "Developer ID Application: Junegunn Choi (Y254DRW44Z)"
-        }
-        zip {
-          output_path = "./dist/fzf-{{ .Version }}-darwin_arm64.zip"
-        }
-        EOF
-        gon /tmp/fzf-gon-arm64.hcl
-        '
-
   - id: fzf
     goos:
+      - darwin
       - linux
       - windows
       - freebsd
@@ -79,6 +25,8 @@ builds:
       - 5
       - 6
       - 7
+    flags:
+      - -trimpath
     ldflags:
       - "-s -w -X main.version={{ .Version }} -X main.revision={{ .ShortCommit }}"
     ignore:
@@ -91,6 +39,42 @@ builds:
       - 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:
@@ -102,21 +86,15 @@ archives:
     files:
       - non-existent*
 
-checksum:
-  extra_files:
-    - glob: ./dist/fzf-*darwin*.zip
-
 release:
   github:
     owner: junegunn
     name: fzf
   prerelease: auto
-  name_template: '{{ .Tag }}'
-  extra_files:
-    - glob: ./dist/fzf-*darwin*.zip
+  name_template: '{{ .Version }}'
 
 snapshot:
-  name_template: "{{ .Tag }}-devel"
+  name_template: "{{ .Version }}-devel"
 
 changelog:
   sort: asc

.rubocop.yml

@@ -6,7 +6,7 @@ Lint/ShadowingOuterLocalVariable:
   Enabled: false
 Style/MethodCallWithArgsParentheses:
   Enabled: true
-  IgnoredMethods:
+  AllowedMethods:
     - assert
     - exit
     - paste
@@ -15,7 +15,7 @@ Style/MethodCallWithArgsParentheses:
     - refute
     - require
     - send_keys
-  IgnoredPatterns:
+  AllowedPatterns:
     - ^assert_
     - ^refute_
 Style/NumericPredicate:

.tool-versions

@@ -1 +1 @@
-golang 1.20.4
+golang 1.20.13

ADVANCED.md

@@ -1,32 +1,34 @@
 Advanced fzf examples
 ======================
 
-* *Last update: 2023/05/26*
-* *Requires fzf 0.41.0 or above*
+* *Last update: 2024/06/24*
+* *Requires fzf 0.54.0 or later*
 
 ---
 
 <!-- vim-markdown-toc GFM -->
 
 * [Introduction](#introduction)
-* [Screen Layout](#screen-layout)
+* [Display modes](#display-modes)
     * [`--height`](#--height)
-    * [`fzf-tmux`](#fzf-tmux)
-        * [Popup window support](#popup-window-support)
+    * [`--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)
 * [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 -->
@@ -60,7 +62,7 @@ learn its wide variety of features.
 This document will guide you through some examples that will familiarize you
 with the advanced features of fzf.
 
-Screen Layout
+Display modes
 -------------
 
 ### `--height`
@@ -101,56 +103,55 @@ Define `$FZF_DEFAULT_OPTS` like so:
 export FZF_DEFAULT_OPTS="--height=40% --layout=reverse --info=inline --border --margin=1 --padding=1"
 ```
 
-### `fzf-tmux`
+### `--tmux`
 
-Before fzf had `--height` option, we would open fzf in a tmux split pane not
-to take up the whole screen. This is done using `fzf-tmux` script.
+(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 on a tmux split pane below the current pane.
-# Takes the same set of options.
-fzf-tmux --layout=reverse
+# Open fzf in a tmux popup at the center of the screen with 70% width and height
+fzf --tmux 70%
 ```
 
-![image](https://user-images.githubusercontent.com/700826/113379973-f1cc6500-93b5-11eb-8860-c9bc4498aadf.png)
+![image](https://github.com/junegunn/fzf/assets/700826/9c365405-c700-49b2-8985-60d822ed4cff)
 
-The limitation of `fzf-tmux` is that it only works when you're on tmux unlike
-`--height` option. But the advantage of it is that it's more flexible.
-(See `man fzf-tmux` for available options.)
+`--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
-# On the right (50%)
-fzf-tmux -r
-
-# On the left (30%)
-fzf-tmux -l30%
-
-# Above the cursor
-fzf-tmux -u30%
+# --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%
 ```
 
-![image](https://user-images.githubusercontent.com/700826/113379983-fa24a000-93b5-11eb-93eb-8a3d39b2f163.png)
+You can also specify the position, width, and height of the popup window in
+the following format:
 
-![image](https://user-images.githubusercontent.com/700826/113380001-0577cb80-93b6-11eb-95d0-2ba453866882.png)
-
-![image](https://user-images.githubusercontent.com/700826/113380040-1d4f4f80-93b6-11eb-9bef-737fb120aafe.png)
-
-#### Popup window support
-
-But here's the really cool part; tmux 3.2 added support for popup windows. So
-you can open fzf in a popup window, which is quite useful if you frequently
-use split panes.
+* `[center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]`
 
 ```sh
-# Open tmux in a tmux popup window (default size: 50% of the screen)
-fzf-tmux -p
-
-# 80% width, 60% height
-fzf-tmux -p 80%,60%
+# 100% width and 60% height
+fzf --tmux 100%,60% --border horizontal
 ```
 
-![image](https://user-images.githubusercontent.com/700826/113380106-4a9bfd80-93b6-11eb-8cee-aeb1c4ce1a1f.png)
+![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.
 >
@@ -208,6 +209,30 @@ find * | fzf --prompt 'All> ' \
 
 ![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
 -------------------
 
@@ -336,7 +361,7 @@ projects, and it will free up memory as you narrow down the results.
 # 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" \
+fzf --ansi --disabled --query "$INITIAL_QUERY" \
     --bind "start:reload:$RG_PREFIX {q}" \
     --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
     --delimiter : \
@@ -347,11 +372,9 @@ INITIAL_QUERY="${*:-}"
 
 ![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 start fzf with
-  an empty input (`: | fzf`), then we make it start the initial Ripgrep
-  process immediately via `start:reload` binding. This way, fzf owns the
-  initial Ripgrep process so it can kill it on the next `reload`. Otherwise,
-  the process will keep running in the background.
+- 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
@@ -375,7 +398,7 @@ fzf-only search mode by *"unbinding"* `reload` action from `change` event.
 # 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" \
+fzf --ansi --disabled --query "$INITIAL_QUERY" \
     --bind "start:reload:$RG_PREFIX {q}" \
     --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
     --bind "alt-enter:unbind(change,alt-enter)+change-prompt(2. fzf> )+enable-search+clear-query" \
@@ -419,7 +442,7 @@ CTRL-F.
 rm -f /tmp/rg-fzf-{r,f}
 RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
 INITIAL_QUERY="${*:-}"
-: | fzf --ansi --disabled --query "$INITIAL_QUERY" \
+fzf --ansi --disabled --query "$INITIAL_QUERY" \
     --bind "start:reload($RG_PREFIX {q})+unbind(ctrl-r)" \
     --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
     --bind "ctrl-f:unbind(change,ctrl-f)+change-prompt(2. fzf> )+enable-search+rebind(ctrl-r)+transform-query(echo {q} > /tmp/rg-fzf-r; cat /tmp/rg-fzf-f)" \
@@ -442,6 +465,41 @@ INITIAL_QUERY="${*:-}"
 [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})'
+```
+
 Log tailing
 -----------
 
@@ -467,15 +525,15 @@ Kubernetes pods.
 
 ```bash
 pods() {
-  : | command='kubectl get pods --all-namespaces' fzf \
+  command='kubectl get pods --all-namespaces' fzf \
     --info=inline --layout=reverse --header-lines=1 \
     --prompt "$(kubectl config current-context | sed 's/-context$//')> " \
     --header $'╱ Enter (kubectl exec) ╱ CTRL-O (open log in editor) ╱ CTRL-R (reload) ╱\n\n' \
     --bind 'start:reload:$command' \
     --bind 'ctrl-r:reload:$command' \
     --bind 'ctrl-/:change-preview-window(80%,border-bottom|hidden|)' \
-    --bind 'enter:execute:kubectl exec -it --namespace {1} {2} -- bash > /dev/tty' \
-    --bind 'ctrl-o:execute:${EDITOR:-vim} <(kubectl logs --all-containers --namespace {1} {2}) > /dev/tty' \
+    --bind 'enter:execute:kubectl exec -it --namespace {1} {2} -- bash' \
+    --bind 'ctrl-o:execute:${EDITOR:-vim} <(kubectl logs --all-containers --namespace {1} {2})' \
     --preview-window up:follow \
     --preview 'kubectl logs --follow --all-containers --tail=10000 --namespace {1} {2}' "$@"
 }
@@ -490,7 +548,7 @@ pods() {
     - 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 to rotate through a different sets of preview
+- Press CTRL-/ repeatedly to rotate through a different sets of preview
   window options
     1. `80%,border-bottom`
     1. `hidden`
@@ -571,6 +629,12 @@ export FZF_DEFAULT_OPTS='--color=bg+:#293739,bg:#1B1D1E,border:#808080,spinner:#
 
 ![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

BUILD.md

@@ -6,7 +6,7 @@ Build instructions
 
 ### Prerequisites
 
-- Go 1.17 or above
+- Go 1.20 or above
 
 ### Using Makefile
 
@@ -24,24 +24,36 @@ make build
 make release
 ```
 
-> :warning: Makefile uses git commands to determine the version and the
-> revision information for `fzf --version`. So if you're building fzf from an
+> [!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`
 
+> [!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
 --------------------------
 
-- [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
 -------

CHANGELOG.md

@@ -1,6 +1,658 @@
 CHANGELOG
 =========
 
+0.56.0
+------
+- Added `--gap[=N]` option to display empty lines between items.
+    - This can be useful to visually separate adjacent multi-line items.
+      ```sh
+      # All bash functions, highlighted
+      declare -f | perl -0777 -pe 's/^}\n/}\0/gm' |
+        bat --plain --language bash --color always |
+        fzf --read0 --ansi --reverse --multi --highlight-line --gap
+      ```
+    - Or just to make the list easier to read. For single-line items, you probably want to set `--color gutter:-1` as well to hide the gutter.
+      ```sh
+      fzf --info inline-right --gap --color gutter:-1
+      ```
+- Added `noinfo` option to `--preview-window` to hide the scroll indicator in the preview window
+- Bug fixes
+    - Thanks to @LangLangBart, @akinomyoga, and @charlievieth for fixing the bugs
+
+0.55.0
+------
+_Release highlights: https://junegunn.github.io/fzf/releases/0.55.0/_
+
+- Added `exact-boundary-match` type to the search syntax. When a search term is single-quoted, fzf will search for the exact occurrences of the string with both ends at word boundaries.
+  ```sh
+  fzf --query "'here'" << EOF
+  come here
+  not there
+  EOF
+  ```
+- [bash] Fuzzy path completion is enabled for all commands
+    - 1. If the default completion is not already set
+    - 2. And if the current bash supports `complete -D` option
+    - However, fuzzy completion for some commands can be "dynamically" disabled by the dynamic completion loader
+    - See the comment in `__fzf_default_completion` function for more information
+- Comments are now allowed in `$FZF_DEFAULT_OPTS` and `$FZF_DEFAULT_OPTS_FILE`
+  ```sh
+  export FZF_DEFAULT_OPTS='
+    # Layout options
+    --layout=reverse
+    --info=inline-right   # Show info on the right side of the prompt line
+    # ...
+  '
+  ```
+- Hyperlinks (OSC 8) are now supported in the preview window and in the main window
+  ```sh
+  printf '<< \e]8;;http://github.com/junegunn/fzf\e\\Link to \e[32mfz\e[0mf\e]8;;\e\\ >>' | fzf --ansi
+
+  fzf --preview "printf '<< \e]8;;http://github.com/junegunn/fzf\e\\Link to \e[32mfz\e[0mf\e]8;;\e\\ >>'"
+  ```
+- The default `--ellipsis` is now `··` instead of `..`.
+- [vim] A spec can have `exit` callback that is called with the exit status of fzf
+    - This can be used to clean up temporary resources or restore the original state when fzf is closed without a selection
+- Fixed `--tmux bottom` when the status line is not at the bottom
+- Fixed extra scroll offset in multi-line mode (`--read0` or `--wrap`)
+- Added fallback `ps` command for `kill` completion on Cygwin
+
+0.54.3
+------
+- Fixed incompatibility of adaptive height specification and 'start:reload'
+  ```sh
+  # A regression in 0.54.0 would cause this to fail
+  fzf --height '~100%' --bind 'start:reload:seq 10'
+  ```
+- Environment variables are now available to `$FZF_DEFAULT_COMMAND`
+  ```sh
+  FZF_DEFAULT_COMMAND='echo $FZF_QUERY' fzf --query foo
+  ```
+
+0.54.2
+------
+- Fixed incorrect syntax highlighting of truncated multi-line entries
+- Updated GoReleaser to 2.1.0 to simplify notarization of macOS binaries
+    - macOS archives will be in `tar.gz` format instead of `zip` format since we no longer notarize the zip files but binaries
+- (Windows) Reverted a mintty fix in 0.54.0
+    - As a result, mouse may not work on mintty in fullscreen mode. However, fzf will correctly read non-ASCII input in fullscreen mode (`--no-height`).
+    - fzf unfortunately cannot read non-ASCII input when not in fullscreen mode on Windows. So if you need to input non-ASCII characters, add `--no-height` to your `$FZF_DEFAULT_OPTS`.
+    - Any help in fixing this issue will be appreciated (#3799, #3847).
+
+0.54.1
+------
+- Updated [fastwalk](https://github.com/charlievieth/fastwalk) dependency for built-in directory walker
+    - [fastwalk: add optional sorting and improve documentation](https://github.com/charlievieth/fastwalk/pull/27)
+    - [fastwalk: only check if MSYSTEM is set during MSYS/MSYS2](https://github.com/charlievieth/fastwalk/pull/28)
+    - Thanks to @charlievieth
+- Reverted ALT-C binding of fish to use `cd` instead of `builtin cd`
+    - `builtin cd` was introduced to work around a bug of `cd` coming from `zoxide init --cmd cd fish` where it cannot handle `--` argument.
+    - However, the default `cd` of fish is actually a wrapper function for supporting `cd -`, so we want to use it instead.
+    - See [#3928](https://github.com/junegunn/fzf/pull/3928) for more information and consider helping zoxide fix the bug.
+
+0.54.0
+------
+_Release highlights: https://junegunn.github.io/fzf/releases/0.54.0/_
+
+- Implemented line wrap of long items
+    - `--wrap` option enables line wrap
+    - `--wrap-sign` customizes the sign for wrapped lines (default: `↳ `)
+    - `toggle-wrap` action toggles line wrap
+      ```sh
+      history | fzf --tac --wrap --bind 'ctrl-/:toggle-wrap' --wrap-sign $'\t↳ '
+      ```
+    - fzf by default binds `CTRL-/` and `ALT-/` to `toggle-wrap`
+- Updated shell integration scripts to leverage line wrap
+    - CTRL-R binding includes `--wrap-sign $'\t↳ '` to indent wrapped lines
+    - `kill **` completion uses `--wrap` to show the whole line by default
+      instead of showing it in the preview window
+- Added `--info-command` option for customizing the info line
+  ```sh
+  # Prepend the current cursor position in yellow
+  fzf --info-command='echo -e "\x1b[33;1m$FZF_POS\x1b[m/$FZF_INFO 💛"'
+  ```
+    - `$FZF_INFO` is set to the original info text
+    - ANSI color codes are supported
+- Pointer and marker signs can be set to empty strings
+  ```sh
+  # Minimal style
+  fzf --pointer '' --marker '' --prompt '' --info hidden
+  ```
+- Better cache management and improved rendering for `--tail`
+- Improved `--sync` behavior
+    - When `--sync` is provided, fzf will not render the interface until the initial filtering and the associated actions (bound to any of `start`, `load`, `result`, or `focus`) are complete.
+      ```sh
+      # fzf will not render intermediate states
+      (sleep 1; seq 1000000; sleep 1) |
+        fzf --sync --query 5 --listen --bind start:up,load:up,result:up,focus:change-header:Ready
+      ```
+- GET endpoint is now available from `execute` and `transform` actions (it used to timeout due to lock conflict)
+  ```sh
+  fzf --listen --sync --bind 'focus:transform-header:curl -s localhost:$FZF_PORT?limit=0 | jq .'
+  ```
+- Added `offset-middle` action to place the current item is in the middle of the screen
+- fzf will not start the initial reader when `reload` or `reload-sync` is bound to `start` event. `fzf < /dev/null` or `: | fzf` are no longer required and extraneous `load` event will not fire due to the empty list.
+  ```sh
+  # Now this will work as expected. Previously, this would print an invalid header line.
+  # `fzf < /dev/null` or `: | fzf` would fix the problem, but then an extraneous 
+  # `load` event would fire and the header would be prematurely updated.
+  fzf --header 'Loading ...' --header-lines 1 \
+      --bind 'start:reload:sleep 1; ps -ef' \
+      --bind 'load:change-header:Loaded!'
+  ```
+- Fixed mouse support on Windows
+- Fixed crash when using `--tiebreak=end` with very long items
+- zsh 5.0 compatibility (thanks to @LangLangBart)
+- Fixed `--walker-skip` to also skip symlinks to directories
+- Fixed `result` event not fired when input stream is not complete
+- New tags will have `v` prefix so that they are available on https://proxy.golang.org/
+
+0.53.0
+------
+_Release highlights: https://junegunn.github.io/fzf/releases/0.53.0/_
+
+- Multi-line display
+    - See [Processing multi-line items](https://junegunn.github.io/fzf/tips/processing-multi-line-items/)
+    - fzf can now display multi-line items
+      ```sh
+      # All bash functions, highlighted
+      declare -f | perl -0777 -pe 's/^}\n/}\0/gm' |
+        bat --plain --language bash --color always |
+        fzf --read0 --ansi --reverse --multi --highlight-line
+
+      # Ripgrep multi-line output
+      rg --pretty bash | perl -0777 -pe 's/\n\n/\n\0/gm' |
+        fzf --read0 --ansi --multi --highlight-line --reverse --tmux 70%
+      ```
+        - To disable multi-line display, use `--no-multi-line`
+    - CTRL-R bindings of bash, zsh, and fish have been updated to leverage multi-line display
+    - The default `--pointer` and `--marker` have been changed from `>` to Unicode bar characters as they look better with multi-line items
+    - Added `--marker-multi-line` to customize the select marker for multi-line entries with the default set to `╻┃╹`
+      ```
+      ╻First line
+      ┃...
+      ╹Last line
+      ```
+- Native tmux integration
+    - Added `--tmux` option to replace fzf-tmux script and simplify distribution
+      ```sh
+      # --tmux [center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]
+      # Center, 100% width and 70% height
+      fzf --tmux 100%,70% --border horizontal --padding 1,2
+
+      # Left, 30% width
+      fzf --tmux left,30%
+
+      # Bottom, 50% height
+      fzf --tmux bottom,50%
+      ```
+        - To keep the implementation simple, it only uses popups. You need tmux 3.3 or later.
+    - To use `--tmux` in Vim plugin:
+      ```vim
+      let g:fzf_layout = { 'tmux': '100%,70%' }
+      ```
+- Added support for endless input streams
+    - See [Browsing log stream with fzf](https://junegunn.github.io/fzf/tips/browsing-log-streams/)
+    - Added `--tail=NUM` option to limit the number of items to keep in memory. This is useful when you want to browse an endless stream of data (e.g. log stream) with fzf while limiting memory usage.
+      ```sh
+      # Interactive filtering of a log stream
+      tail -f *.log | fzf --tail 100000 --tac --no-sort --exact
+      ```
+- Better Windows Support
+    - fzf now works on Git bash (mintty) out of the box via winpty integration
+    - Many fixes and improvements for Windows
+- man page is now embedded in the binary; `fzf --man` to see it
+- Changed the default `--scroll-off` to 3, as we think it's a better default
+- Process started by `execute` action now directly writes to and reads from `/dev/tty`. Manual `/dev/tty` redirection for interactive programs is no longer required.
+  ```sh
+  # Vim will work fine without /dev/tty redirection
+  ls | fzf --bind 'space:execute:vim {}' > selected
+  ```
+- Added `print(...)` action to queue an arbitrary string to be printed on exit. This was mainly added to work around the limitation of `--expect` where it's not compatible with `--bind` on the same key and it would ignore other actions bound to it.
+  ```sh
+  # This doesn't work as expected because --expect is not compatible with --bind
+  fzf --multi --expect ctrl-y --bind 'ctrl-y:select-all'
+
+  # This is something you can do instead
+  fzf --multi --bind 'enter:print()+accept,ctrl-y:select-all+print(ctrl-y)+accept'
+  ```
+    - We also considered making them compatible, but realized that some users may have been relying on the current behavior.
+- [`NO_COLOR`](https://no-color.org/) environment variable is now respected. If the variable is set, fzf defaults to `--no-color` unless otherwise specified.
+
+0.52.1
+------
+- Fixed a critical bug in the Windows version
+    - Windows users are strongly encouraged to upgrade to this version
+
+0.52.0
+------
+- Added `--highlight-line` to highlight the whole current line (à la `set cursorline` of Vim)
+- Added color names for selected lines: `selected-fg`, `selected-bg`, and `selected-hl`
+  ```sh
+  fzf --border --multi --info inline-right --layout reverse --marker ▏ --pointer ▌ --prompt '▌ '  \
+      --highlight-line --color gutter:-1,selected-bg:238,selected-fg:146,current-fg:189
+  ```
+- Added `click-header` event that is triggered when the header section is clicked. When the event is triggered, `$FZF_CLICK_HEADER_COLUMN` and `$FZF_CLICK_HEADER_LINE` are set.
+  ```sh
+  fd --type f |
+    fzf --header $'[Files] [Directories]' --header-first \
+        --bind 'click-header:transform:
+          (( FZF_CLICK_HEADER_COLUMN <= 7 )) && echo "reload(fd --type f)"
+          (( FZF_CLICK_HEADER_COLUMN >= 9 )) && echo "reload(fd --type d)"
+        '
+  ```
+- Add `$FZF_COMPLETION_{DIR,PATH}_OPTS` for separately customizing the behavior of fuzzy completion
+  ```sh
+  # Set --walker options without 'follow' not to follow symbolic links
+  FZF_COMPLETION_PATH_OPTS="--walker=file,dir,hidden"
+  FZF_COMPLETION_DIR_OPTS="--walker=dir,hidden"
+  ```
+- Fixed Windows argument escaping
+- Bug fixes and improvements
+- The code was heavily refactored to allow using fzf as a library in Go programs. The API is still experimental and subject to change.
+    - https://gist.github.com/junegunn/193990b65be48a38aac6ac49d5669170
+
+0.51.0
+------
+- Added a new environment variable `$FZF_POS` exported to the child processes. It's the vertical position of the cursor in the list starting from 1.
+  ```sh
+  # Toggle selection to the top or to the bottom
+  seq 30 | fzf --multi --bind 'load:pos(10)' \
+    --bind 'shift-up:transform:for _ in $(seq $FZF_POS $FZF_MATCH_COUNT); do echo -n +toggle+up; done' \
+    --bind 'shift-down:transform:for _ in $(seq 1 $FZF_POS); do echo -n +toggle+down; done'
+  ```
+- Added `--with-shell` option to start child processes with a custom shell command and flags
+  ```sh
+  gem list | fzf --with-shell 'ruby -e' \
+    --preview 'pp Gem::Specification.find_by_name({1})' \
+    --bind 'ctrl-o:execute-silent:
+        spec = Gem::Specification.find_by_name({1})
+        [spec.homepage, *spec.metadata.filter { _1.end_with?("uri") }.values].uniq.each do
+          system "open", _1
+        end
+    '
+  ```
+- Added `change-multi` action for dynamically changing `--multi` option
+    - `change-multi` - enable multi-select mode with no limit
+    - `change-multi(NUM)` - enable multi-select mode with a limit
+    - `change-multi(0)` - disable multi-select mode
+- Windows improvements
+    - `become` action is now supported on Windows
+        - Unlike in *nix, this does not use `execve(2)`. Instead it spawns a new process and waits for it to finish, so the exact behavior may differ.
+    - Fixed argument escaping for Windows cmd.exe. No redundant escaping of backslashes.
+- Bug fixes and improvements
+
+0.50.0
+------
+- Search performance optimization. You can observe 50%+ improvement in some scenarios.
+  ```
+  $ rg --line-number --no-heading --smart-case . > $DATA
+
+  $ wc < $DATA
+   5520118 26862362 897487793
+
+  $ hyperfine -w 1 -L bin fzf-0.49.0,fzf-7ce6452,fzf-a5447b8,fzf '{bin} --filter "///" < $DATA | head -30'
+  Summary
+    fzf --filter "///" < $DATA | head -30 ran
+      1.16 ± 0.03 times faster than fzf-a5447b8 --filter "///" < $DATA | head -30
+      1.23 ± 0.03 times faster than fzf-7ce6452 --filter "///" < $DATA | head -30
+      1.52 ± 0.03 times faster than fzf-0.49.0 --filter "///" < $DATA | head -30
+  ```
+- Added `jump` and `jump-cancel` events that are triggered when leaving `jump` mode
+  ```sh
+  # Default behavior
+  fzf --bind space:jump
+
+  # Same as jump-accept action
+  fzf --bind space:jump,jump:accept
+
+  # Accept on jump, abort on cancel
+  fzf --bind space:jump,jump:accept,jump-cancel:abort
+
+  # Change header on jump-cancel
+  fzf --bind 'space:change-header(Type jump label)+jump,jump-cancel:change-header:Jump cancelled'
+  ```
+- Added a new environment variable `$FZF_KEY` exported to the child processes. It's the name of the last key pressed.
+  ```sh
+  fzf --bind 'space:jump,jump:accept,jump-cancel:transform:[[ $FZF_KEY =~ ctrl-c ]] && echo abort'
+  ```
+- fzf can be built with profiling options. See [BUILD.md](BUILD.md) for more information.
+- Bug fixes
+
+0.49.0
+------
+- Ingestion performance improved by around 40% (more or less depending on options)
+- `--info=hidden` and `--info=inline-right` will no longer hide the horizontal separator by default. This gives you more flexibility in customizing the layout.
+    ```sh
+    fzf --border --info=inline-right
+    fzf --border --info=inline-right --separator ═
+    fzf --border --info=inline-right --no-separator
+    fzf --border --info=hidden
+    fzf --border --info=hidden --separator ━
+    fzf --border --info=hidden --no-separator
+    ```
+- Added two environment variables exported to the child processes
+    - `FZF_PREVIEW_LABEL`
+    - `FZF_BORDER_LABEL`
+    ```sh
+    # Use the current value of $FZF_PREVIEW_LABEL to determine which actions to perform
+    git ls-files |
+      fzf --header 'Press CTRL-P to change preview mode' \
+          --bind='ctrl-p:transform:[[ $FZF_PREVIEW_LABEL =~ cat ]] \
+          && echo "change-preview(git log --color=always \{})+change-preview-label([[ log ]])" \
+          || echo "change-preview(bat --color=always \{})+change-preview-label([[ cat ]])"'
+    ```
+- Renamed `track` action to `track-current` to highlight the difference between the global tracking state set by `--track` and a one-off tracking action
+    - `track` is still available as an alias
+- Added `untrack-current` and `toggle-track-current` actions
+    - `*-current` actions are no-op when the global tracking state is set
+- Bug fixes and minor improvements
+
+0.48.1
+------
+- CTRL-T and ALT-C bindings can be disabled by setting `FZF_CTRL_T_COMMAND` and `FZF_ALT_C_COMMAND` to empty strings respectively when sourcing the script
+    ```sh
+    # bash
+    FZF_CTRL_T_COMMAND= FZF_ALT_C_COMMAND= eval "$(fzf --bash)"
+
+    # zsh
+    FZF_CTRL_T_COMMAND= FZF_ALT_C_COMMAND= eval "$(fzf --zsh)"
+
+    # fish
+    fzf --fish | FZF_CTRL_T_COMMAND= FZF_ALT_C_COMMAND= source
+    ```
+    - Setting the variables after sourcing the script will have no effect
+- Bug fixes
+
+0.48.0
+------
+- Shell integration scripts are now embedded in the fzf binary. This simplifies the distribution, and the users are less likely to have problems caused by using incompatible scripts and binaries.
+    - bash
+      ```sh
+      # Set up fzf key bindings and fuzzy completion
+      eval "$(fzf --bash)"
+      ```
+    - zsh
+      ```sh
+      # Set up fzf key bindings and fuzzy completion
+      eval "$(fzf --zsh)"
+      ```
+    - fish
+      ```fish
+      # Set up fzf key bindings
+      fzf --fish | source
+      ```
+- Added options for customizing the behavior of the built-in walker
+    | Option               | Description                                       | Default              |
+    | ---                  | ---                                               | ---                  |
+    | `--walker=OPTS`      | Walker options (`[file][,dir][,follow][,hidden]`) | `file,follow,hidden` |
+    | `--walker-root=DIR`  | Root directory from which to start walker         | `.`                  |
+    | `--walker-skip=DIRS` | Comma-separated list of directory names to skip   | `.git,node_modules`  |
+    - Examples
+        ```sh
+        # Built-in walker is only used by standalone fzf when $FZF_DEFAULT_COMMAND is not set
+        unset FZF_DEFAULT_COMMAND
+
+        fzf # default: --walker=file,follow,hidden --walker-root=. --walker-skip=.git,node_modules
+        fzf --walker=file,dir,hidden,follow --walker-skip=.git,node_modules,target
+
+        # Walker options in $FZF_DEFAULT_OPTS
+        export FZF_DEFAULT_OPTS="--walker=file,dir,hidden,follow --walker-skip=.git,node_modules,target"
+        fzf
+
+        # Reading from STDIN; --walker is ignored
+        seq 100 | fzf --walker=dir
+
+        # Reading from $FZF_DEFAULT_COMMAND; --walker is ignored
+        export FZF_DEFAULT_COMMAND='seq 100'
+        fzf --walker=dir
+        ```
+- Shell integration scripts have been updated to use the built-in walker with these new options and they are now much faster out of the box.
+
+0.47.0
+------
+- Replaced ["the default find command"][find] with a built-in directory walker to simplify the code and to achieve better performance and consistent behavior across platforms.
+  This doesn't affect you if you have `$FZF_DEFAULT_COMMAND` set.
+    - Breaking changes:
+        - Unlike [the previous "find" command][find], the new traversal code will list hidden files, but hidden directories will still be ignored
+        - No filtering of `devtmpfs` or `proc` types
+        - Traversal is parallelized, so the order of the entries will be different each time
+    - You may wonder why fzf implements directory walker anyway when it's a filter program following the [Unix philosophy][unix].
+      But fzf has had [the walker code for years][walker] to tackle the performance problem on Windows. And I decided to use the same approach on different platforms as well for the benefits listed above.
+    - Built-in walker is using the excellent [charlievieth/fastwalk][fastwalk] library, which easily outperforms its competitors and supports safely following symlinks.
+- Added `$FZF_DEFAULT_OPTS_FILE` to allow managing default options in a file
+    - See [#3618](https://github.com/junegunn/fzf/pull/3618)
+    - Option precedence from lower to higher
+        1. Options read from `$FZF_DEFAULT_OPTS_FILE`
+        1. Options from `$FZF_DEFAULT_OPTS`
+        1. Options from command-line arguments
+- Bug fixes and improvements
+
+[find]: https://github.com/junegunn/fzf/blob/0.46.1/src/constants.go#L60-L64
+[walker]: https://github.com/junegunn/fzf/pull/1847
+[fastwalk]: https://github.com/charlievieth/fastwalk
+[unix]: https://en.wikipedia.org/wiki/Unix_philosophy
+
+0.46.1
+------
+- Bug fixes and improvements
+- Fixed Windows binaries
+- Downgraded Go version to 1.20 to support older versions of Windows
+    - https://tip.golang.org/doc/go1.21#windows
+- Updated [rivo/uniseg](https://github.com/rivo/uniseg) dependency to v0.4.6
+
+0.46.0
+------
+- Added two new events
+    - `result` - triggered when the filtering for the current query is complete and the result list is ready
+    - `resize` - triggered when the terminal size is changed
+- fzf now exports the following environment variables to the child processes
+  | Variable           | Description                                                 |
+  | ---                | ---                                                         |
+  | `FZF_LINES`        | Number of lines fzf takes up excluding padding and margin   |
+  | `FZF_COLUMNS`      | Number of columns fzf takes up excluding padding and margin |
+  | `FZF_TOTAL_COUNT`  | Total number of items                                       |
+  | `FZF_MATCH_COUNT`  | Number of matched items                                     |
+  | `FZF_SELECT_COUNT` | Number of selected items                                    |
+  | `FZF_QUERY`        | Current query string                                        |
+  | `FZF_PROMPT`       | Prompt string                                               |
+  | `FZF_ACTION`       | The name of the last action performed                       |
+  - This allows you to write sophisticated transformations like so
+    ```sh
+    # Script to dynamically resize the preview window
+    transformer='
+      # 1 line for info, another for prompt, and 2 more lines for preview window border
+      lines=$(( FZF_LINES - FZF_MATCH_COUNT - 4 ))
+      if [[ $FZF_MATCH_COUNT -eq 0 ]]; then
+        echo "change-preview-window:hidden"
+      elif [[ $lines -gt 3 ]]; then
+        echo "change-preview-window:$lines"
+      elif [[ $FZF_PREVIEW_LINES -ne 3 ]]; then
+        echo "change-preview-window:3"
+      fi
+    '
+    seq 10000 | fzf --preview 'seq {} 10000' --preview-window up \
+                    --bind "result:transform:$transformer" \
+                    --bind "resize:transform:$transformer"
+    ```
+  - And we're phasing out `{fzf:prompt}` and `{fzf:action}`
+- Changed [mattn/go-runewidth](https://github.com/mattn/go-runewidth) dependency to [rivo/uniseg](https://github.com/rivo/uniseg) for accurate results
+    - Set `--ambidouble` if your terminal displays ambiguous width characters (e.g. box-drawing characters for borders) as 2 columns
+    - `RUNEWIDTH_EASTASIAN=1` is still respected for backward compatibility, but it's recommended that you use this new option instead
+- Bug fixes
+
+0.45.0
+------
+- Added `transform` action to conditionally perform a series of actions
+  ```sh
+  # Disallow selecting an empty line
+  echo -e "1. Hello\n2. Goodbye\n\n3. Exit" |
+    fzf --height '~100%' --reverse --header 'Select one' \
+        --bind 'enter:transform:[[ -n {} ]] && echo accept || echo "change-header:Invalid selection"'
+
+  # Move cursor past the empty line
+  echo -e "1. Hello\n2. Goodbye\n\n3. Exit" |
+    fzf --height '~100%' --reverse --header 'Select one' \
+        --bind 'enter:transform:[[ -n {} ]] && echo accept || echo "change-header:Invalid selection"' \
+        --bind 'focus:transform:[[ -n {} ]] && exit; [[ {fzf:action} =~ up$ ]] && echo up || echo down'
+
+  # A single key binding to toggle between modes
+  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)"'
+  ```
+- Added placeholder expressions
+    - `{fzf:action}` - The name of the last action performed
+    - `{fzf:prompt}` - Prompt string (including ANSI color codes)
+    - `{fzf:query}` - Synonym for `{q}`
+- Added support for negative height
+  ```sh
+  # Terminal height minus 1, so you can still see the command line
+  fzf --height=-1
+  ```
+  - This handles a terminal resize better than `--height=$(($(tput lines) - 1))`
+- Added `accept-or-print-query` action that acts like `accept` but prints the
+  current query when there's no match for the query
+  ```sh
+  # You can make CTRL-R paste the current query when there's no match
+  export FZF_CTRL_R_OPTS='--bind enter:accept-or-print-query'
+  ```
+  - Note that there are alternative ways to implement the same strategy
+    ```sh
+    # 'become' is apparently more versatile but it's not available on Windows.
+    export FZF_CTRL_R_OPTS='--bind "enter:become:if [ -z {} ]; then echo {q}; else echo {}; fi"'
+
+    # Using the new 'transform' action
+    export FZF_CTRL_R_OPTS='--bind "enter:transform:[ -z {} ] && echo print-query || echo accept"'
+    ```
+- Added `show-header` and `hide-header` actions
+- Bug fixes
+
+0.44.1
+------
+- Fixed crash when preview window is hidden on `focus` event
+
+0.44.0
+------
+- (Experimental) Sixel image support in preview window (not available on Windows)
+    - [bin/fzf-preview.sh](bin/fzf-preview.sh) is added to demonstrate how to
+      display an image using Kitty image protocol or Sixel. You can use it
+      like so:
+      ```sh
+      fzf --preview='fzf-preview.sh {}'
+      ```
+- (Experimental) iTerm2 inline image protocol support in preview window (not available on Windows)
+  ```sh
+  # Using https://iterm2.com/utilities/imgcat
+  fzf --preview 'imgcat -W $FZF_PREVIEW_COLUMNS -H $FZF_PREVIEW_LINES {}'
+  ```
+- HTTP server can be configured to accept remote connections
+  ```sh
+  # FZF_API_KEY is required for a non-localhost listen address
+  export FZF_API_KEY="$(head -c 32 /dev/urandom | base64)"
+  fzf --listen 0.0.0.0:6266
+  ```
+    - To allow remote process execution, use `--listen-unsafe` instead
+      (`execute*`, `reload*`, `become`, `preview`, `change-preview`, `transform-*`)
+      ```sh
+      fzf --listen-unsafe 0.0.0.0:6266
+      ```
+- Bug fixes
+
+0.43.0
+------
+- (Experimental) Added support for Kitty image protocol in the preview window
+  (not available on Windows)
+  ```sh
+  fzf --preview='
+    if file --mime-type {} | grep -qF image/; then
+      # --transfer-mode=memory is the fastest option but if you want fzf to be able
+      # to redraw the image on terminal resize or on 'change-preview-window',
+      # you need to use --transfer-mode=stream.
+      kitty icat --clear --transfer-mode=memory --unicode-placeholder --stdin=no --place=${FZF_PREVIEW_COLUMNS}x${FZF_PREVIEW_LINES}@0x0 {} | sed \$d
+    else
+      bat --color=always {}
+    fi
+  '
+  ```
+- (Experimental) `--listen` server can report program state in JSON format (`GET /`)
+  ```sh
+  # fzf server started in "headless" mode
+  fzf --listen 6266 2> /dev/null
+
+  # Get program state
+  curl localhost:6266 | jq .
+
+  # Increase the number of items returned (default: 100)
+  curl localhost:6266?limit=1000 | jq .
+  ```
+- `--listen` server can be secured by setting `$FZF_API_KEY` environment
+  variable.
+  ```sh
+  export FZF_API_KEY="$(head -c 32 /dev/urandom | base64)"
+
+  # Server
+  fzf --listen 6266
+
+  # Client
+  curl localhost:6266 -H "x-api-key: $FZF_API_KEY" -d 'change-query(yo)'
+  ```
+- Added `toggle-header` action
+- Added mouse events for `--bind`
+    - `scroll-up` (bound to `up`)
+    - `scroll-down` (bound to `down`)
+    - `shift-scroll-up` (bound to `toggle+up`)
+    - `shift-scroll-down` (bound to `toggle+down`)
+    - `shift-left-click` (bound to `toggle`)
+    - `shift-right-click` (bound to `toggle`)
+    - `preview-scroll-up` (bound to `preview-up`)
+    - `preview-scroll-down` (bound to `preview-down`)
+    ```sh
+    # Twice faster scrolling both in the main window and the preview window
+    fzf --bind 'scroll-up:up+up,scroll-down:down+down' \
+        --bind 'preview-scroll-up:preview-up+preview-up' \
+        --bind 'preview-scroll-down:preview-down+preview-down' \
+        --preview 'cat {}'
+    ```
+- Added `offset-up` and `offset-down` actions
+  ```sh
+  # Scrolling will behave similarly to CTRL-E and CTRL-Y of vim
+  fzf --bind scroll-up:offset-up,scroll-down:offset-down \
+      --bind ctrl-y:offset-up,ctrl-e:offset-down \
+      --scroll-off=5
+  ```
+- Shell extensions
+    - Updated bash completion for fzf options
+    - bash key bindings no longer requires perl; it will use awk or mawk
+      instead if perl is not found
+    - Basic context-aware completion for ssh command
+    - Applied `--scheme=path` for better ordering of the result
+- Bug fixes and improvements
+
+0.42.0
+------
+- Added new info style: `--info=right`
+- Added new info style: `--info=inline-right`
+- Added new border style `thinblock` which uses symbols for legacy computing
+  [one eighth block elements](https://en.wikipedia.org/wiki/Symbols_for_Legacy_Computing)
+    - Similarly to `block`, this style is suitable when using a different
+      background color because the window is completely contained within the border.
+      ```sh
+      BAT_THEME=GitHub fzf --info=right --border=thinblock --preview-window=border-thinblock \
+          --margin=3 --scrollbar=▏▕ --preview='bat --color=always --style=numbers {}' \
+          --color=light,query:238,fg:238,bg:251,bg+:249,gutter:251,border:248,preview-bg:253
+      ```
+    - This style may not render correctly depending on the font and the
+      terminal emulator.
+
+0.41.1
+------
+- Fixed a bug where preview window is not updated when `--disabled` is set and
+  a reload is triggered by `change:reload` binding
+
 0.41.0
 ------
 - Added color name `preview-border` and `preview-scrollbar`
@@ -332,7 +984,7 @@ CHANGELOG
           (sleep 2; seq 1000) | fzf --height ~50%
           ```
 - Fixed tcell renderer used to render full-screen fzf on Windows
-- `--no-clear` is deprecated. Use `reload` action instead.
+- ~~`--no-clear` is deprecated. Use `reload` action instead.~~
 
 0.33.0
 ------

Dockerfile

@@ -1,6 +1,6 @@
-FROM --platform=linux/amd64 archlinux
-RUN pacman -Sy && pacman --noconfirm -S awk git tmux zsh fish ruby procps go make gcc
-RUN gem install --no-document -v 5.14.2 minitest
+FROM ubuntu:24.04
+RUN apt-get update -y && apt install -y git make golang zsh fish ruby 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
 
@@ -8,4 +8,5 @@ RUN echo '. ~/.bashrc' >> ~/.bash_profile
 RUN rm -f /etc/bash.bashrc
 COPY . /fzf
 RUN cd /fzf && make install && ./install --all
+ENV LANG C.UTF-8
 CMD tmux new 'set -o pipefail; ruby /fzf/test/test_go.rb | tee out && touch ok' && cat out && [ -e ok ]

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2013-2023 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

@@ -1,20 +1,20 @@
 SHELL          := bash
 GO             ?= go
-GOOS           ?= $(word 1, $(subst /, " ", $(word 4, $(shell go version))))
+GOOS           ?= $(shell $(GO) env GOOS)
 
 MAKEFILE       := $(realpath $(lastword $(MAKEFILE_LIST)))
 ROOT_DIR       := $(shell dirname $(MAKEFILE))
-SOURCES        := $(wildcard *.go src/*.go src/*/*.go) $(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)
+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 sed "s/-.*//" <<< $(VERSION))
+VERSION_TRIM   := $(shell sed "s/^v//; s/-.*//" <<< $(VERSION))
 VERSION_REGEX  := $(subst .,\.,$(VERSION_TRIM))
 
 ifdef FZF_REVISION
@@ -25,7 +25,7 @@ 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 "$(TAGS)"
+BUILD_FLAGS    := -a -ldflags "-s -w -X main.version=$(VERSION) -X main.revision=$(REVISION)" -tags "$(TAGS)" -trimpath
 
 BINARY32       := fzf-$(GOOS)_386
 BINARY64       := fzf-$(GOOS)_amd64
@@ -57,7 +57,9 @@ else ifeq ($(UNAME_M),armv6l)
 else ifeq ($(UNAME_M),armv7l)
 	BINARY := $(BINARYARM7)
 else ifeq ($(UNAME_M),armv8l)
-	BINARY := $(BINARYARM8)
+	# 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)
@@ -75,7 +77,6 @@ endif
 all: target/$(BINARY)
 
 test: $(SOURCES)
-	[ -z "$$(gofmt -s -d src)" ] || (gofmt -s -d src; exit 1)
 	SHELL=/bin/sh GOOS= $(GO) test -v -tags "$(TAGS)" \
 				github.com/junegunn/fzf/src \
 				github.com/junegunn/fzf/src/algo \
@@ -85,12 +86,23 @@ test: $(SOURCES)
 bench:
 	cd src && SHELL=/bin/sh GOOS= $(GO) test -v -tags "$(TAGS)" -run=Bench -bench=. -benchmem
 
+lint: $(SOURCES) test/test_go.rb
+	[ -z "$$(gofmt -s -d src)" ] || (gofmt -s -d src; exit 1)
+	rubocop --require rubocop-minitest --require rubocop-performance
+
 install: bin/fzf
 
+generate:
+	PATH=$(PATH):$(GOPATH)/bin $(GO) generate ./...
+
 build:
-	goreleaser build --rm-dist --snapshot --skip-post-hooks
+	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
@@ -117,7 +129,7 @@ endif
 	git push origin temp --follow-tags --force
 
 	# Make a GitHub release
-	goreleaser --rm-dist --release-notes tmp/release-note
+	goreleaser --clean --release-notes tmp/release-note
 
 	# Push to master
 	git checkout master
@@ -164,15 +176,15 @@ bin/fzf: target/$(BINARY) | bin
 	cp -f target/$(BINARY) bin/fzf
 
 docker:
-	docker build -t fzf-arch .
-	docker run -it fzf-arch tmux
+	docker build -t fzf-ubuntu .
+	docker run -it fzf-ubuntu tmux
 
 docker-test:
-	docker build -t fzf-arch .
-	docker run -it fzf-arch
+	docker build -t fzf-ubuntu .
+	docker run -it fzf-ubuntu
 
 update:
 	$(GO) get -u
 	$(GO) mod tidy
 
-.PHONY: all build release test bench install clean docker docker-test update
+.PHONY: all generate build release test bench lint install clean docker docker-test update

README-VIM.md

@@ -26,6 +26,9 @@ 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'
 ```
@@ -235,19 +238,20 @@ 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 use find command (or
-`$FZF_DEFAULT_COMMAND` if defined) to list the files under the current
-directory. When you select one, it will open it with the sink, `:e` command.
-If you want to open it in a new tab, you can pass `:tabedit` command instead
-as the sink.
+command line without standard input pipe; fzf will traverse the file system
+under the current directory to get the list of files. (If
+`$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'})
 ```
 
-Instead of using the default find command, you can use any shell command as
-the source. The following example will list the files managed by git. It's
-equivalent to running `git ls-files | fzf` on shell.
+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'})
@@ -285,12 +289,13 @@ The following table summarizes the available options.
 | `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       | Reference to function to process each selected item                   |
+| `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) fzf-tmux options (e.g. `-p90%,60%`)                          |
+| `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}`) |
 
@@ -453,12 +458,13 @@ 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 fzf-tmux options in `tmux` key.
+or above) by putting `--tmux` option value in `tmux` key.
 
 ```vim
-" See `man fzf-tmux` for available options
+" See `--tmux` option in `man fzf` for available options
+" [center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]
 if exists('$TMUX')
-  let g:fzf_layout = { 'tmux': '-p90%,60%' }
+  let g:fzf_layout = { 'tmux': '90%,70%' }
 else
   let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
 endif
@@ -486,4 +492,4 @@ autocmd  FileType fzf set laststatus=0 noshowmode noruler
 
 The MIT License (MIT)
 
-Copyright (c) 2013-2023 Junegunn Choi
+Copyright (c) 2013-2024 Junegunn Choi

bin/fzf-preview.sh

@@ -0,0 +1,74 @@
+#!/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: $0 FILENAME"
+  exit 1
+fi
+
+file=${1/#\~\//$HOME/}
+type=$(file --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 -- "$file"
+  exit
+fi
+
+dim=${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 kitty icat on kitty terminal
+if [[ $KITTY_WINDOW_ID ]]; then
+  # 1. 'memory' is the fastest option but if you want the image to be scrollable,
+  #    you have to use 'stream'.
+  #
+  # 2. The last line of the output is the ANSI reset code without newline.
+  #    This confuses fzf and makes it render scroll offset indicator.
+  #    So we remove the last line and append the reset code to its previous line.
+  kitty icat --clear --transfer-mode=memory --unicode-placeholder --stdin=no --place="$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

@@ -7,7 +7,7 @@ fail() {
   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=()
@@ -19,6 +19,9 @@ term=""
 [[ -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 [LAYOUT OPTIONS] [--] [FZF OPTIONS]
 
@@ -94,10 +97,18 @@ while [[ $# -gt 0 ]]; do
         opt="$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
@@ -132,8 +143,10 @@ if [[ -z "$TMUX" ]]; then
   exit $?
 fi
 
-# --height option is not allowed. CTRL-Z is also disabled.
-args=("${args[@]}" "--no-height" "--bind=ctrl-z:ignore")
+# * --height option is not allowed
+# * CTRL-Z is also disabled
+# * fzf-tmux script is not compatible with --tmux option in fzf 0.53.0 or later
+args=("${args[@]}" "--no-height" "--bind=ctrl-z:ignore" "--no-tmux")
 
 # Handle zoomed tmux pane without popup options by moving it to a temp window
 if [[ ! "$opt" =~ "-E" ]] && tmux list-panes -F '#F' | grep -q Z; then
@@ -151,12 +164,18 @@ argsf="${TMPDIR:-/tmp}/fzf-args-$id"
 fifo1="${TMPDIR:-/tmp}/fzf-fifo1-$id"
 fifo2="${TMPDIR:-/tmp}/fzf-fifo2-$id"
 fifo3="${TMPDIR:-/tmp}/fzf-fifo3-$id"
-tmux_win_opts=( $(tmux show-window-options remain-on-exit \; show-window-options synchronize-panes | sed '/ off/d; s/^/set-window-option /; s/$/ \\;/') )
+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
 
   # Restore tmux window options
-  if [[ "${#tmux_win_opts[@]}" -gt 0 ]]; then
+  if [[ "${#tmux_win_opts[@]}" -gt 1 ]]; then
     eval "tmux ${tmux_win_opts[*]}"
   fi
 
@@ -179,19 +198,21 @@ trap 'cleanup' EXIT
 
 envs="export TERM=$TERM "
 if [[ "$opt" =~ "-E" ]]; then
-  tmux_version=$(tmux -V | sed 's/[^0-9.]//g')
-  if [[ $(awk '{print ($1 > 3.2)}' <<< "$tmux_version" 2> /dev/null || bc -l <<< "$tmux_version > 3.2") = 1 ]]; 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"
-  elif [[ $tmux_version = 3.2 ]]; then
-    FZF_DEFAULT_OPTS="--margin 0,1 $FZF_DEFAULT_OPTS"
   else
     echo "fzf-tmux: tmux 3.2 or above is required for popup mode" >&2
     exit 2
   fi
 fi
-[[ -n "$FZF_DEFAULT_OPTS"    ]] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
-[[ -n "$FZF_DEFAULT_COMMAND" ]] && envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"
+envs="$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
@@ -225,9 +246,9 @@ else
   cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" >> $argsf
   cat <&0 > $fifo1 &
 fi
-tmux set-window-option synchronize-panes off \;\
-  set-window-option remain-on-exit off \;\
+tmux \
   split-window -c "$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

@@ -1,4 +1,4 @@
-fzf.txt	fzf	Last change: Mar 20 2023
+fzf.txt	fzf	Last change: February 15 2024
 FZF - TABLE OF CONTENTS                                            *fzf* *fzf-toc*
 ==============================================================================
 
@@ -32,6 +32,9 @@ 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
 <
@@ -40,6 +43,9 @@ 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'
 <
@@ -68,16 +74,16 @@ 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])`
+ 1. `fzf#run([spec dict])`
    - Starts fzf inside Vim with the given spec
-   - `:call fzf#run({'source': 'ls'})`
- 2. `fzf#wrap([spec dict]) -> (dict)`
+   - `: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'})`
+     - `: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]`
+     - `: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
@@ -222,12 +228,12 @@ list:
   `spinner`                    | Streaming input indicator
   `query`                      | Query string
   `disabled`                   | Query string when search is disabled
-  `prompt`                     | Prompt before query ( `> ` )
+  `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
+ - `group1 [, group2, ...]` is a list of highlight groups that are searched (in
    order) for a matching color definition
 
 For example, consider the following specification:
@@ -258,17 +264,18 @@ 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 use find command (or
-`$FZF_DEFAULT_COMMAND` if defined) to list the files under the current
-directory. When you select one, it will open it with the sink, `:e` command.
-If you want to open it in a new tab, you can pass `:tabedit` command instead
-as the sink.
+command line without standard input pipe; fzf will traverse the file system
+under the current directory to get the list of files. (If
+`$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'})
 <
-Instead of using the default find command, you can use any shell command as
-the source. The following example will list the files managed by git. It's
-equivalent to running `git ls-files | fzf` on shell.
+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'})
 <
@@ -296,17 +303,18 @@ The following table summarizes the available options.
  ---------------------------+---------------+----------------------------------------------------------------------
  Option name                | Type          | Description                                                          ~
  ---------------------------+---------------+----------------------------------------------------------------------
-  `source`                    | string        | External command to generate input to fzf (e.g.  `find .` )
+  `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       | Reference to function to process each selected item
+  `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) fzf-tmux options (e.g.  `-p90%,60%` )
-  `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}` )
+  `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
@@ -343,7 +351,7 @@ 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)`
+ - `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`
@@ -377,7 +385,7 @@ last `fullscreen` argument of `fzf#wrap` (see :help <bang>).
     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.
+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))
@@ -396,10 +404,10 @@ unique name to our command and pass it as the first argument to `fzf#wrap`.
 
  - `g:fzf_layout`
  - `g:fzf_action`
-   - Works only when no custom `sink` (or `sink*`) is provided
+   - 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)
+       same strategy (i.e. `tabedit some-color-scheme` doesn't make sense)
  - `g:fzf_colors`
  - `g:fzf_history_dir`
 
@@ -411,24 +419,12 @@ TIPS                                                                  *fzf-tips*
 < fzf inside terminal buffer >________________________________________________~
                                                     *fzf-inside-terminal-buffer*
 
-The latest versions of Vim and Neovim include builtin terminal emulator
-(`:terminal`) and fzf will start in a terminal buffer in the following cases:
-
- - On Neovim
- - On GVim
- - On Terminal Vim with a non-default layout
-   - `call fzf#run({'left': '30%'})` or `let g:fzf_layout = {'left': '30%'}`
 
 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.
 
-                   *g:terminal_color_15* *g:terminal_color_14* *g:terminal_color_13*
-*g:terminal_color_12* *g:terminal_color_11* *g:terminal_color_10* *g:terminal_color_9*
-   *g:terminal_color_8* *g:terminal_color_7* *g:terminal_color_6* *g:terminal_color_5*
-   *g:terminal_color_4* *g:terminal_color_3* *g:terminal_color_2* *g:terminal_color_1*
-                                                            *g:terminal_color_0*
 >
     " Terminal colors for seoul256 color scheme
     if has('nvim')
@@ -474,11 +470,12 @@ in Neovim.
     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 fzf-tmux options in `tmux` key.
+or above) by putting `--tmux` options in `tmux` key.
 >
-    " See `man fzf-tmux` for available options
+    " See `--tmux` option in `man fzf` for available options
+    " [center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]
     if exists('$TMUX')
-      let g:fzf_layout = { 'tmux': '-p90%,60%' }
+      let g:fzf_layout = { 'tmux': '90%,70%' }
     else
       let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
     endif
@@ -488,7 +485,7 @@ or above) by putting fzf-tmux options in `tmux` key.
                                                            *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
+`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':
@@ -506,7 +503,7 @@ LICENSE                                                            *fzf-license*
 
 The MIT License (MIT)
 
-Copyright (c) 2013-2023 Junegunn Choi
+Copyright (c) 2013-2024 Junegunn Choi
 
 ==============================================================================
 vim:tw=78:sw=2:ts=2:ft=help:norl:nowrap:

go.mod

@@ -1,21 +1,20 @@
 module github.com/junegunn/fzf
 
 require (
-	github.com/gdamore/tcell/v2 v2.5.4
-	github.com/mattn/go-isatty v0.0.17
-	github.com/mattn/go-runewidth v0.0.14
-	github.com/mattn/go-shellwords v1.0.12
-	github.com/rivo/uniseg v0.4.4
-	github.com/saracen/walker v0.1.3
-	golang.org/x/sys v0.8.0
-	golang.org/x/term v0.8.0
+	github.com/charlievieth/fastwalk v1.0.9
+	github.com/gdamore/tcell/v2 v2.7.4
+	github.com/junegunn/go-shellwords v0.0.0-20240813092932-a62c48c52e97
+	github.com/mattn/go-isatty v0.0.20
+	github.com/rivo/uniseg v0.4.7
+	golang.org/x/sys v0.26.0
+	golang.org/x/term v0.25.0
 )
 
 require (
 	github.com/gdamore/encoding v1.0.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
-	golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4 // indirect
-	golang.org/x/text v0.5.0 // indirect
+	github.com/mattn/go-runewidth v0.0.15 // indirect
+	golang.org/x/text v0.14.0 // indirect
 )
 
-go 1.17
+go 1.20

go.sum

@@ -1,49 +1,57 @@
+github.com/charlievieth/fastwalk v1.0.9 h1:Odb92AfoReO3oFBfDGT5J+nwgzQPF/gWAw6E6/lkor0=
+github.com/charlievieth/fastwalk v1.0.9/go.mod h1:yGy1zbxog41ZVMcKA/i8ojXLFsuayX5VvwhQVoj9PBI=
 github.com/gdamore/encoding v1.0.0 h1:+7OoQ1Bc6eTm5niUzBa0Ctsh6JbMW6Ra+YNuAtDBdko=
 github.com/gdamore/encoding v1.0.0/go.mod h1:alR0ol34c49FCSBLjhosxzcPHQbf2trDkoo5dl+VrEg=
-github.com/gdamore/tcell/v2 v2.5.4 h1:TGU4tSjD3sCL788vFNeJnTdzpNKIw1H5dgLnJRQVv/k=
-github.com/gdamore/tcell/v2 v2.5.4/go.mod h1:dZgRy5v4iMobMEcWNYBtREnDZAT9DYmfqIkrgEMxLyw=
+github.com/gdamore/tcell/v2 v2.7.4 h1:sg6/UnTM9jGpZU+oFYAsDahfchWAFW8Xx2yFinNSAYU=
+github.com/gdamore/tcell/v2 v2.7.4/go.mod h1:dSXtXTSK0VsW1biw65DZLZ2NKr7j0qP/0J7ONmsraWg=
+github.com/junegunn/go-shellwords v0.0.0-20240813092932-a62c48c52e97 h1:rqzLixVo1c/GQW6px9j1xQmlvQIn+lf/V6M1UQ7IFzw=
+github.com/junegunn/go-shellwords v0.0.0-20240813092932-a62c48c52e97/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 v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=
-github.com/mattn/go-isatty v0.0.17/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
-github.com/mattn/go-runewidth v0.0.14 h1:+xnbZSEeDbOIg5/mE6JF0w6n9duR1l3/WmbinWVwUuU=
-github.com/mattn/go-runewidth v0.0.14/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
-github.com/mattn/go-shellwords v1.0.12 h1:M2zGm7EW6UQJvDeQxo4T51eKPurbeFbe8WtebGE2xrk=
-github.com/mattn/go-shellwords v1.0.12/go.mod h1:EZzvwXDESEeg03EKmM+RmDnNOPKG4lLtQsUlTZDWQ8Y=
+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 v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
+github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
-github.com/rivo/uniseg v0.4.4 h1:8TfxU8dW6PdqD27gjM8MVNuicgxIjxpm4K7x4jp8sis=
-github.com/rivo/uniseg v0.4.4/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
-github.com/saracen/walker v0.1.3 h1:YtcKKmpRPy6XJTHJ75J2QYXXZYWnZNQxPCVqZSHVV/g=
-github.com/saracen/walker v0.1.3/go.mod h1:FU+7qU8DeQQgSZDmmThMJi93kPkLFgy0oVAcLxurjIk=
+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/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/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/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220601150217-0de741cfad7f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4 h1:uVc8UZUe6tr40fFVnUP5Oj+veunVezqYl9z7DYw9xzw=
 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/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 v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
-golang.org/x/sys v0.8.0/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 v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
+golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 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 v0.8.0 h1:n5xxQn2i3PC0yLAbjTpNT85q/Kgzcr2gIoX9OrJUols=
-golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
+golang.org/x/term v0.25.0 h1:WtHI/ltw4NvSUig5KARz9h521QvRC8RmF/cuYqifU24=
+golang.org/x/term v0.25.0/go.mod h1:RPyXicDX+6vLxogjjRxjgD2TKtmAO6NZBsBRfrOLu7M=
 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 v0.5.0 h1:OLmvp0KP+FVG99Ct/qFiL/Fhk4zp4QQnZ7b2U+5piUM=
-golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 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/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

install

@@ -2,7 +2,7 @@
 
 set -u
 
-version=0.41.0
+version=0.56.0
 auto_completion=
 key_bindings=
 update_config=2
@@ -115,7 +115,7 @@ link_fzf_in_path() {
 try_curl() {
   command -v curl > /dev/null &&
   if [[ $1 =~ tar.gz$ ]]; then
-    curl -fL $1 | tar -xzf -
+    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"
@@ -125,7 +125,7 @@ try_curl() {
 try_wget() {
   command -v wget > /dev/null &&
   if [[ $1 =~ tar.gz$ ]]; then
-    wget -O - $1 | tar -xzf -
+    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"
@@ -146,7 +146,7 @@ download() {
   fi
 
   local url
-  url=https://github.com/junegunn/fzf/releases/download/$version/${1}
+  url=https://github.com/junegunn/fzf/releases/download/v$version/${1}
   set -o pipefail
   if ! (try_curl $url || try_wget $url); then
     set +o pipefail
@@ -168,8 +168,8 @@ archi=$(uname -sm)
 binary_available=1
 binary_error=""
 case "$archi" in
-  Darwin\ arm64)      download fzf-$version-darwin_arm64.zip     ;;
-  Darwin\ x86_64)     download fzf-$version-darwin_amd64.zip     ;;
+  Darwin\ arm64)      download fzf-$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   ;;
@@ -196,12 +196,12 @@ if [ -n "$binary_error" ]; then
     echo "  - $binary_error !!!"
   fi
   if command -v go > /dev/null; then
-    echo -n "Building binary (go get -u github.com/junegunn/fzf) ... "
+    echo -n "Building binary (go install github.com/junegunn/fzf) ... "
     if [ -z "${GOPATH-}" ]; then
       export GOPATH="${TMPDIR:-/tmp}/fzf-gopath"
       mkdir -p "$GOPATH"
     fi
-    if go get -ldflags "-s -w -X main.version=$version -X main.revision=go-get" github.com/junegunn/fzf; then
+    if go install -ldflags "-s -w -X main.version=$version -X main.revision=go-install" github.com/junegunn/fzf; then
       echo "OK"
       cp "$GOPATH/bin/fzf" "$fzf_base/bin/"
     else
@@ -245,7 +245,7 @@ for shell in $shells; do
   src=${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="# $fzf_completion"
   fi
@@ -262,6 +262,16 @@ if [[ ! "\$PATH" == *$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
@@ -270,6 +280,7 @@ $fzf_completion
 # ------------
 $fzf_key_bindings
 EOF
+  fi
   echo "OK"
 done
 
@@ -281,18 +292,6 @@ if [[ "$shells" =~ fish ]]; then
   or set --universal fish_user_paths \$fish_user_paths "$fzf_base"/bin
 EOF
   [ $? -eq 0 ] && echo "OK" || echo "Failed"
-
-  mkdir -p "${fish_dir}/functions"
-  fish_binding="${fish_dir}/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() {
@@ -355,12 +354,23 @@ done
 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_key_bindings' \
+      '  fzf --fish | source' \
       'end'
   else
-    append_line $update_config "fzf_key_bindings" "$bind_file"
+    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
 

install.ps1

@@ -1,4 +1,4 @@
-$version="0.41.0"
+$version="0.56.0"
 
 $fzf_base=Split-Path -Parent $MyInvocation.MyCommand.Definition
 
@@ -40,7 +40,7 @@ function download {
     return
   }
   cd "$fzf_base\bin"
-  $url="https://github.com/junegunn/fzf/releases/download/$version/$file"
+  $url="https://github.com/junegunn/fzf/releases/download/v$version/$file"
   $temp=$env:TMP + "\fzf.zip"
   [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
   if ($PSVersionTable.PSVersion.Major -ge 3) {

main.go

@@ -1,14 +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 string = "0.41"
-var revision string = "devel"
+var version = "0.56"
+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()
-	fzf.Run(fzf.ParseOptions(), version, revision)
+
+	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) 2013-2023 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
@@ -21,48 +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 "May 2023" "fzf 0.41.0" "fzf-tmux - open fzf in tmux split pane"
+.TH fzf\-tmux 1 "Oct 2024" "fzf 0.56.0" "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 [LAYOUT OPTIONS] [--] [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 or in
+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
+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 LAYOUT OPTIONS
 
-(default layout: \fB-d 50%\fR)
+(default layout: \fB\-d 50%\fR)
 
 .SS Popup window
 (requires tmux 3.2 or above)
 .TP
-.B "-p [WIDTH[%][,HEIGHT[%]]]"
+.B "\-p [WIDTH[%][,HEIGHT[%]]]"
 .TP
-.B "-w WIDTH[%]"
+.B "\-w WIDTH[%]"
 .TP
-.B "-h WIDTH[%]"
+.B "\-h WIDTH[%]"
 .TP
-.B "-x COL"
+.B "\-x COL"
 .TP
-.B "-y ROW"
+.B "\-y ROW"
 
 .SS Split pane
 .TP
-.B "-u [height[%]]"
+.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

plugin/fzf.vim

@@ -1,4 +1,4 @@
-" Copyright (c) 2013-2023 Junegunn Choi
+" Copyright (c) 2013-2024 Junegunn Choi
 "
 " MIT License
 "
@@ -59,12 +59,9 @@ if s:is_win
     return iconv(a:str, &encoding, 'cp'.s:codepage)
   endfunction
   function! s:wrap_cmds(cmds)
-    return map([
-      \ '@echo off',
-      \ 'setlocal enabledelayedexpansion']
+    return map(['@echo off']
     \ + (has('gui_running') ? ['set TERM= > nul'] : [])
-    \ + (type(a:cmds) == type([]) ? a:cmds : [a:cmds])
-    \ + ['endlocal'],
+    \ + (type(a:cmds) == type([]) ? a:cmds : [a:cmds]),
     \ '<SID>enc_to_cp(v:val."\r")')
   endfunction
 else
@@ -84,11 +81,21 @@ else
 endif
 
 function! s:shellesc_cmd(arg)
-  let escaped = substitute(a:arg, '[&|<>()@^]', '^&', 'g')
-  let escaped = substitute(escaped, '%', '%%', 'g')
-  let escaped = substitute(escaped, '"', '\\^&', 'g')
-  let escaped = substitute(escaped, '\(\\\+\)\(\\^\)', '\1\1\2', 'g')
-  return '^"'.substitute(escaped, '\(\\\+\)$', '\1\1', '').'^"'
+  let e = '"'
+  let slashes = 0
+  for c in split(a:arg, '\zs')
+    if c ==# '\'
+      let slashes += 1
+    elseif c ==# '"'
+      let e .= repeat('\', slashes + 1)
+      let slashes = 0
+    else
+      let slashes = 0
+    endif
+    let e .= c
+  endfor
+  let e .= repeat('\', slashes) .'"'
+  return substitute(substitute(e, '[&|<>()^!"]', '^&', 'g'), '%', '%%', 'g')
 endfunction
 
 function! fzf#shellescape(arg, ...)
@@ -191,6 +198,7 @@ function! s:compare_binary_versions(a, b)
   return s:compare_versions(s:get_version(a:a), s:get_version(a:b))
 endfunction
 
+let s:min_version = '0.53.0'
 let s:checked = {}
 function! fzf#exec(...)
   if !exists('s:exec')
@@ -218,7 +226,11 @@ function! fzf#exec(...)
     let s:exec = binaries[-1]
   endif
 
-  if a:0 && !has_key(s:checked, a:1)
+  let min_version = s:min_version
+  if a:0 && s:compare_versions(a:1, min_version) > 0
+    let min_version = a:1
+  endif
+  if !has_key(s:checked, min_version)
     let fzf_version = s:get_version(s:exec)
     if empty(fzf_version)
       let message = printf('Failed to run "%s --version"', s:exec)
@@ -226,17 +238,17 @@ function! fzf#exec(...)
       throw message
     end
 
-    if s:compare_versions(fzf_version, a:1) >= 0
-      let s:checked[a:1] = 1
+    if s:compare_versions(fzf_version, min_version) >= 0
+      let s:checked[min_version] = 1
       return s:exec
-    elseif a:0 < 2 && input(printf('You need fzf %s or above. Found: %s. Download binary? (y/n) ', a:1, fzf_version)) =~? '^y'
+    elseif a:0 < 2 && input(printf('You need fzf %s or above. Found: %s. Download binary? (y/n) ', min_version, fzf_version)) =~? '^y'
       let s:versions = {}
       unlet s:exec
       redraw
       call fzf#install()
-      return fzf#exec(a:1, 1)
+      return fzf#exec(min_version, 1)
     else
-      throw printf('You need to upgrade fzf (required: %s or above)', a:1)
+      throw printf('You need to upgrade fzf (required: %s or above)', min_version)
     endif
   endif
 
@@ -320,7 +332,10 @@ function! s:common_sink(action, lines) abort
     " the execution (e.g. `set autochdir` or `autocmd BufEnter * lcd ...`)
     let cwd = exists('w:fzf_pushd') ? w:fzf_pushd.dir : expand('%:p:h')
     for item in a:lines
-      if item[0] != '~' && item !~ (s:is_win ? '^[A-Z]:\' : '^/')
+      if has('win32unix') && item !~ '/'
+        let item = substitute(item, '\', '/', 'g')
+      end
+      if item[0] != '~' && item !~ (s:is_win ? '^\([A-Z]:\)\?\' : '^/')
         let sep = s:is_win ? '\' : '/'
         let item = join([cwd, item], cwd[len(cwd)-1] == sep ? '' : sep)
       endif
@@ -456,6 +471,32 @@ function! s:writefile(...)
   endif
 endfunction
 
+function! s:extract_option(opts, name)
+  let opt = ''
+  let expect = 0
+  " There are a few cases where this function doesn't work as expected.
+  " Let's just assume such cases are extremely unlikely in real world.
+  "   e.g. --query --border
+  for word in split(a:opts)
+    if expect && word !~ '^"\=-'
+      let opt = opt . ' ' . word
+      let expect = 0
+    elseif word == '--no-'.a:name
+      let opt = ''
+    elseif word =~ '^--'.a:name.'='
+      let opt = word
+    elseif word =~ '^--'.a:name.'$'
+      let opt = word
+      let expect = 1
+    elseif expect
+      let expect = 0
+    endif
+  endfor
+  return opt
+endfunction
+
+let s:need_cmd_window = has('win32unix') && $TERM_PROGRAM ==# 'mintty' && s:compare_versions($TERM_PROGRAM_VERSION, '3.4.5') < 0 && !executable('winpty')
+
 function! fzf#run(...) abort
 try
   let [shell, shellslash, shellcmdflag, shellxquote] = s:use_sh()
@@ -477,19 +518,19 @@ try
   endif
 
   if has_key(dict, 'source')
-    let source = remove(dict, 'source')
+    let source = dict.source
     let type = type(source)
     if type == 1
-      let source_command = source
+      let prefix = '('.source.')|'
     elseif type == 3
       let temps.input = s:fzf_tempname()
       call s:writefile(source, temps.input)
-      let source_command = (s:is_win ? 'type ' : 'cat ').fzf#shellescape(temps.input)
+      let prefix = (s:is_win ? 'type ' : 'command cat ').fzf#shellescape(temps.input).'|'
     else
       throw 'Invalid source type'
     endif
   else
-    let source_command = ''
+    let prefix = ''
   endif
 
   let prefer_tmux = get(g:, 'fzf_prefer_tmux', 0) || has_key(dict, 'tmux')
@@ -498,26 +539,23 @@ try
         \ executable('tput') && filereadable('/dev/tty')
   let has_vim8_term = has('terminal') && has('patch-8.0.995')
   let has_nvim_term = has('nvim-0.2.1') || has('nvim') && !s:is_win
-  let use_term = has_nvim_term ||
-    \ has_vim8_term && !has('win32unix') && (has('gui_running') || s:is_win || s:present(dict, 'down', 'up', 'left', 'right', 'window'))
+  let use_term = has_nvim_term || has_vim8_term
+    \ && !s:need_cmd_window
+    \ && (has('gui_running') || s:is_win || s:present(dict, 'down', 'up', 'left', 'right', 'window'))
   let use_tmux = (has_key(dict, 'tmux') || (!use_height && !use_term || prefer_tmux) && !has('win32unix') && s:splittable(dict)) && s:tmux_enabled()
   if prefer_tmux && use_tmux
     let use_height = 0
     let use_term = 0
   endif
   if use_term
-    let optstr .= ' --no-height'
+    let optstr .= ' --no-height --no-tmux'
   elseif use_height
     let height = s:calc_size(&lines, dict.down, dict)
-    let optstr .= ' --height='.height
+    let optstr .= ' --no-tmux --height='.height
   endif
-  " Respect --border option given in 'options'
-  let optstr = join([s:border_opt(get(dict, 'window', 0)), optstr])
-  let prev_default_command = $FZF_DEFAULT_COMMAND
-  if len(source_command)
-    let $FZF_DEFAULT_COMMAND = source_command
-  endif
-  let command = (use_tmux ? s:fzf_tmux(dict) : fzf_exec).' '.optstr.' > '.temps.result
+  " Respect --border option given in $FZF_DEFAULT_OPTS and 'options'
+  let optstr = join([s:border_opt(get(dict, 'window', 0)), s:extract_option($FZF_DEFAULT_OPTS, 'border'), optstr])
+  let command = prefix.(use_tmux ? s:fzf_tmux(dict) : fzf_exec).' '.optstr.' > '.temps.result
 
   if use_term
     return s:execute_term(dict, command, temps)
@@ -528,14 +566,6 @@ try
   call s:callback(dict, lines)
   return lines
 finally
-  if exists('source_command') && len(source_command)
-    if len(prev_default_command)
-      let $FZF_DEFAULT_COMMAND = prev_default_command
-    else
-      let $FZF_DEFAULT_COMMAND = ''
-      silent! execute 'unlet $FZF_DEFAULT_COMMAND'
-    endif
-  endif
   let [&shell, &shellslash, &shellcmdflag, &shellxquote] = [shell, shellslash, shellcmdflag, shellxquote]
 endtry
 endfunction
@@ -554,19 +584,21 @@ function! s:fzf_tmux(dict)
   if empty(size)
     for o in ['up', 'down', 'left', 'right']
       if s:present(a:dict, o)
-        let spec = a:dict[o]
-        if (o == 'up' || o == 'down') && spec[0] == '~'
-          let size = '-'.o[0].s:calc_size(&lines, spec, a:dict)
-        else
-          " Legacy boolean option
-          let size = '-'.o[0].(spec == 1 ? '' : substitute(spec, '^\~', '', ''))
-        endif
+        let size = o . ',' . a:dict[o]
         break
       endif
     endfor
   endif
-  return printf('LINES=%d COLUMNS=%d %s %s - --',
-    \ &lines, &columns, fzf#shellescape(s:fzf_tmux), size)
+
+  " Legacy fzf-tmux options
+  if size =~ '-'
+    return printf('LINES=%d COLUMNS=%d %s %s %s --',
+          \ &lines, &columns, fzf#shellescape(s:fzf_tmux), size, (has_key(a:dict, 'source') ? '' : '-'))
+  end
+
+  " Using native --tmux option
+  let in = (has_key(a:dict, 'source') ? '' : ' --force-tty-in')
+  return printf('%s --tmux %s%s', fzf#shellescape(fzf#exec()), size, in)
 endfunction
 
 function! s:splittable(dict)
@@ -638,21 +670,17 @@ else
   let s:launcher = function('s:xterm_launcher')
 endif
 
-function! s:exit_handler(code, command, ...)
-  if a:code == 130
-    return 0
-  elseif has('nvim') && a:code == 129
-    " When deleting the terminal buffer while fzf is still running,
-    " Nvim sends SIGHUP.
-    return 0
-  elseif a:code > 1
+function! s:exit_handler(dict, code, command, ...)
+  if has_key(a:dict, 'exit')
+    call a:dict.exit(a:code)
+  endif
+  if a:code == 2
     call s:error('Error running ' . a:command)
     if !empty(a:000)
       sleep
     endif
-    return 0
   endif
-  return 1
+  return a:code
 endfunction
 
 function! s:execute(dict, command, use_height, temps) abort
@@ -689,21 +717,22 @@ function! s:execute(dict, command, use_height, temps) abort
       call jobstart(cmd, fzf)
       return []
     endif
-  elseif has('win32unix') && $TERM !=# 'cygwin'
+  elseif s:need_cmd_window
     let shellscript = s:fzf_tempname()
     call s:writefile([command], shellscript)
-    let command = 'cmd.exe /C '.fzf#shellescape('set "TERM=" & start /WAIT sh -c '.shellscript)
+    let command = 'start //WAIT sh -c '.shellscript
     let a:temps.shellscript = shellscript
   endif
   if a:use_height
-    call system(printf('tput cup %d > /dev/tty; tput cnorm > /dev/tty; %s < /dev/tty 2> /dev/tty', &lines, command))
+    let stdin = has_key(a:dict, 'source') ? '' : '< /dev/tty'
+    call system(printf('tput cup %d > /dev/tty; tput cnorm > /dev/tty; %s %s 2> /dev/tty', &lines, command, stdin))
   else
     execute 'silent !'.command
   endif
   let exit_status = v:shell_error
   redraw!
   let lines = s:collect(a:temps)
-  return s:exit_handler(exit_status, command) ? lines : []
+  return s:exit_handler(a:dict, exit_status, command) < 2 ? lines : []
 endfunction
 
 function! s:execute_tmux(dict, command, temps) abort
@@ -718,7 +747,7 @@ function! s:execute_tmux(dict, command, temps) abort
   let exit_status = v:shell_error
   redraw!
   let lines = s:collect(a:temps)
-  return s:exit_handler(exit_status, command) ? lines : []
+  return s:exit_handler(a:dict, exit_status, command) < 2 ? lines : []
 endfunction
 
 function! s:calc_size(max, val, dict)
@@ -884,7 +913,7 @@ function! s:execute_term(dict, command, temps) abort
     endif
 
     let lines = s:collect(self.temps)
-    if !s:exit_handler(a:code, self.command, 1)
+    if s:exit_handler(self.dict, a:code, self.command, 1) >= 2
       return
     endif
 
@@ -921,7 +950,7 @@ function! s:execute_term(dict, command, temps) abort
         let term_opts.curwin = 1
       endif
       call s:handle_ambidouble(term_opts)
-      let fzf.buf = term_start([&shell, &shellcmdflag, command], term_opts)
+      keepjumps let fzf.buf = term_start([&shell, &shellcmdflag, command], term_opts)
       if is_popup && exists('#TerminalWinOpen')
         doautocmd <nomodeline> TerminalWinOpen
       endif

shell/completion.bash

@@ -4,36 +4,44 @@
 #  / __/ / /_/ __/
 # /_/   /___/_/ completion.bash
 #
-# - $FZF_TMUX               (default: 0)
-# - $FZF_TMUX_OPTS          (default: empty)
-# - $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 .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@^\./@@'
-  }
-fi
 
-if ! declare -f _fzf_compgen_dir > /dev/null; then
-  _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@^\./@@'
-  }
-fi
+# To use custom commands instead of find, override _fzf_compgen_{path,dir}
+#
+#   _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' 2> /dev/null
 
+__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%} --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo "${FZF_DEFAULT_OPTS-} $2"
+}
+
 __fzf_comprun() {
   if [[ "$(type -t _fzf_comprun 2>&1)" = function ]]; then
     _fzf_comprun "$@"
@@ -62,65 +70,174 @@ __fzf_orig_completion() {
   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" "$func"
+}
+
 _fzf_opts_completion() {
   local cur prev opts
   COMPREPLY=()
   cur="${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
-    --pointer
-    --marker
-    --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
@@ -134,28 +251,33 @@ _fzf_opts_completion() {
 }
 
 _fzf_handle_dynamic_completion() {
-  local cmd orig_var orig ret orig_cmd orig_complete
+  local cmd ret REPLY orig_cmd orig_complete
   cmd="$1"
   shift
   orig_cmd="$1"
-  orig_var="_fzf_orig_completion_$cmd"
-  orig="${!orig_var-}"
-  orig="${orig##*#}"
-  if [[ -n "$orig" ]] && type "$orig" > /dev/null 2>&1; then
-    $orig "$@"
+  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)
-    _completion_loader "$@"
+    $_fzf_completion_loader "$@"
     ret=$?
     # _completion_loader may not have updated completion for the command
     if [[ "$(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
 }
@@ -166,13 +288,12 @@ __fzf_generic_path_completion() {
   if [[ $cmd == \\* ]]; then
     cmd="${cmd:1}"
   fi
-  cmd="${cmd//[^A-Za-z0-9_=]/_}"
   COMPREPLY=()
   trigger=${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"
@@ -182,9 +303,24 @@ __fzf_generic_path_completion() {
         leftover=${leftover/#\/}
         [[ -z "$dir" ]] && dir='.'
         [[ "$dir" != "/" ]] && dir="${dir/%\//}"
-        matches=$(eval "$1 $(printf %q "$dir")" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-} $2" __fzf_comprun "$4" -q "$leftover" | while read -r item; do
-          printf "%q " "${item%$3}$3"
-        done)
+        matches=$(
+          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 [[ $1 =~ dir ]]; then
+              walker=dir,follow
+              rest=${FZF_COMPLETION_DIR_OPTS-}
+            else
+              walker=file,dir,follow,hidden
+              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% }
         [[ -z "$3" ]] && [[ "${__fzf_nospace_commands-}" = *" ${COMP_WORDS[0]} "* ]] && matches="$matches "
         if [[ -n "$matches" ]]; then
@@ -195,7 +331,7 @@ __fzf_generic_path_completion() {
         printf '\e[5n'
         return 0
       fi
-      dir=$(dirname "$dir")
+      dir=$(command dirname "$dir")
       [[ "$dir" =~ /$ ]] || dir="$dir"/
     done
   else
@@ -229,16 +365,19 @@ _fzf_complete() {
   fi
 
   local cur selected trigger cmd post
-  post="$(caller 0 | awk '{print $2}')_post"
-  type -t "$post" > /dev/null 2>&1 || post=cat
+  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=$(FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-} $str_arg" __fzf_comprun "${rest[0]}" "${args[@]}" -q "$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"
     if [[ -n "$selected" ]]; then
       COMPREPLY=("$selected")
@@ -270,34 +409,69 @@ _fzf_complete_kill() {
 }
 
 _fzf_proc_completion() {
-  _fzf_complete -m --header-lines=1 --preview 'echo {}' --preview-window down:3:wrap --min-height 15 -- "$@" < <(
+  _fzf_complete -m --header-lines=1 --no-preview --wrap -- "$@" < <(
     command ps -eo user,pid,ppid,start,time,command 2> /dev/null ||
-      command ps -eo user,pid,ppid,time,args # For BusyBox
+      command ps -eo user,pid,ppid,time,args 2> /dev/null || # For BusyBox
+      command ps --everyone --full --windows # For cygwin
   )
 }
 
 _fzf_proc_completion_post() {
-  awk '{print $2}'
+  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 $i}' | command sort -u
+  }
+fi
+
 _fzf_host_completion() {
-  _fzf_complete +m -- "$@" < <(
-    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 | tr ',' '\n' | tr -d '[' | awk '{ print $1 " " $1 }') \
-        <(command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0') |
-        awk '{if (length($2) > 0) {print $2}}' | sort -u
-  )
+  _fzf_complete +m -- "$@" < <(__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() {
+  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 | sed -En 's|^declare [^ ]+ ([^=]+).*|\1|p'
+    declare -xp | command sed -En 's|^declare [^ ]+ ([^=]+).*|\1|p'
   )
 }
 
 _fzf_alias_completion() {
   _fzf_complete -m -- "$@" < <(
-    alias | sed -En 's|^alias ([^=]+).*|\1|p'
+    alias | command sed -En 's|^alias ([^=]+).*|\1|p'
   )
 }
 
@@ -308,34 +482,69 @@ complete -o default -F _fzf_opts_completion fzf
 # fzf-tmux specific options (like `-w WIDTH`) are left as a future patch.
 complete -o default -F _fzf_opts_completion fzf-tmux
 
-d_cmds="${FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir}"
-a_cmds="
-  awk bat cat diff diff3
+# Default path completion
+__fzf_default_completion() {
+  __fzf_generic_path_completion _fzf_compgen_path "-m" "" "$@"
+
+  # 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"
+  svn tar unzip zip"}"
+v_cmds="${FZF_COMPLETION_VAR_COMMANDS-export unset printenv}"
 
 # Preserve existing completion
-__fzf_orig_completion < <(complete -p $d_cmds $a_cmds 2> /dev/null)
+__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
+  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
@@ -348,10 +557,24 @@ done
 
 # Directory
 for cmd in $d_cmds; do
-  __fzf_defc "$cmd" _fzf_dir_completion "-o nospace -o dirnames"
+  __fzf_defc "$cmd" _fzf_dir_completion "-o bashdefault -o nospace -o dirnames"
 done
 
-unset cmd d_cmds a_cmds
+# Variables
+for cmd in $v_cmds; do
+  __fzf_defc "$cmd" _fzf_var_completion "-o default -o nospace -v"
+done
+
+# Aliases
+__fzf_defc unalias _fzf_alias_completion "-a"
+
+# Processes
+__fzf_defc kill _fzf_proc_completion "-o default -o bashdefault"
+
+# ssh
+__fzf_defc ssh _fzf_complete_ssh "-o default -o bashdefault"
+
+unset cmd d_cmds a_cmds v_cmds
 
 _fzf_setup_completion() {
   local kind fn cmd
@@ -373,10 +596,4 @@ _fzf_setup_completion() {
   done
 }
 
-# Environment variables / Aliases / Hosts / Process
-_fzf_setup_completion 'var'   export unset printenv
-_fzf_setup_completion 'alias' unalias
-_fzf_setup_completion 'host'  ssh telnet
-_fzf_setup_completion 'proc'  kill
-
 fi

shell/completion.zsh

@@ -4,10 +4,13 @@
 #  / __/ / /_/ __/
 # /_/   /___/_/ completion.zsh
 #
-# - $FZF_TMUX               (default: 0)
-# - $FZF_TMUX_OPTS          (default: '-d 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
@@ -67,35 +70,40 @@ fi
 # 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.
-'emulate' 'zsh' '-o' 'no_aliases'
+'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.
 {
-
-# Bail out if not interactive shell.
-[[ -o interactive ]] || return 0
+# 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 .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@^\./@@'
-  }
-fi
-
-if ! declare -f _fzf_compgen_dir > /dev/null; then
-  _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@^\./@@'
-  }
-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@^\./@@'
+#   }
 
 ###########################################################
 
+__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%} --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo "${FZF_DEFAULT_OPTS-} $2"
+}
+
 __fzf_comprun() {
   if [[ "$(type _fzf_comprun 2>&1)" =~ function ]]; then
     _fzf_comprun "$@"
@@ -137,7 +145,10 @@ __fzf_generic_path_completion() {
   tail=$6
 
   setopt localoptions nonomatch
-  eval "base=$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 ${dir} ]]; then
@@ -145,10 +156,26 @@ __fzf_generic_path_completion() {
       leftover=${leftover/#\/}
       [ -z "$dir" ] && dir='.'
       [ "$dir" != "/" ] && dir="${dir/%\//}"
-      matches=$(eval "$compgen $(printf %q "$dir")" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-}" __fzf_comprun "$cmd" ${(Q)${(Z+n+)fzf_opts}} -q "$leftover" | while read item; do
-        item="${item%$suffix}$suffix"
-        echo -n "${(q)item} "
-      done)
+      matches=$(
+        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" ${(Q)${(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" ${(Q)${(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"
@@ -171,11 +198,11 @@ _fzf_dir_completion() {
     "" "/" ""
 }
 
-_fzf_feed_fifo() (
+_fzf_feed_fifo() {
   command rm -f "$1"
   mkfifo "$1"
-  cat <&0 > "$1" &
-)
+  cat <&0 > "$1" &|
+}
 
 _fzf_complete() {
   setopt localoptions ksh_arrays
@@ -208,28 +235,48 @@ _fzf_complete() {
   type $post > /dev/null 2>&1 || post=cat
 
   _fzf_feed_fifo "$fifo"
-  matches=$(FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-} $str_arg" __fzf_comprun "$cmd" "${args[@]}" -q "${(Q)prefix}" < "$fifo" | $post | tr '\n' ' ')
+  matches=$(
+    FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse" "${FZF_COMPLETION_OPTS-} $str_arg") \
+    FZF_DEFAULT_OPTS_FILE='' \
+      __fzf_comprun "$cmd" "${args[@]}" -q "${(Q)prefix}" < "$fifo" | $post | tr '\n' ' ')
   if [ -n "$matches" ]; then
     LBUFFER="$lbuf$matches"
   fi
   command rm -f "$fifo"
 }
 
-_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 $2}}' | sort -u
-  )
-}
-
-_fzf_complete_ssh() {
-  _fzf_complete +m -- "$@" < <(
+# 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 | tr ',' '\n' | tr -d '[' | 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
-  )
+      <(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 $i}' | sort -u
+  }
+fi
+
+_fzf_complete_telnet() {
+  _fzf_complete +m -- "$@" < <(__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 $prefix variable passed from the caller.
+_fzf_complete_ssh() {
+  local -a tokens
+  tokens=(${(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() {
@@ -251,9 +298,10 @@ _fzf_complete_unalias() {
 }
 
 _fzf_complete_kill() {
-  _fzf_complete -m --header-lines=1 --preview 'echo {}' --preview-window down:3:wrap --min-height 15 -- "$@" < <(
+  _fzf_complete -m --header-lines=1 --no-preview --wrap -- "$@" < <(
     command ps -eo user,pid,ppid,start,time,command 2> /dev/null ||
-      command ps -eo user,pid,ppid,time,args # For BusyBox
+      command ps -eo user,pid,ppid,time,args 2> /dev/null || # For BusyBox
+      command ps --everyone --full --windows # For cygwin
   )
 }
 
@@ -290,9 +338,12 @@ fzf-completion() {
 
   # Trigger sequence given
   if [ ${#tokens} -gt 1 -a "$tail" = "$trigger" ]; then
-    d_cmds=(${=FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir})
+    d_cmds=(${=FZF_COMPLETION_DIR_COMMANDS-cd pushd rmdir})
 
     [ -z "$trigger"      ] && prefix=${tokens[-1]} || prefix=${tokens[-1]:0:-${#trigger}}
+    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
@@ -317,6 +368,7 @@ fzf-completion() {
 
 zle     -N   fzf-completion
 bindkey '^I' fzf-completion
+fi
 
 } always {
   # Restore the original options.

shell/key-bindings.bash

@@ -11,24 +11,29 @@
 # - $FZF_ALT_C_COMMAND
 # - $FZF_ALT_C_OPTS
 
+if [[ $- =~ i ]]; then
+
+
 # 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%} --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo "${FZF_DEFAULT_OPTS-} $2"
+}
+
 __fzf_select__() {
-  local cmd opts
-  cmd="${FZF_CTRL_T_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/\\.*' -o -fstype 'sysfs' -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-"}"
-  opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore --reverse ${FZF_DEFAULT_OPTS-} ${FZF_CTRL_T_OPTS-} -m"
-  eval "$cmd" |
-    FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) "$@" |
+  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
 }
 
-if [[ $- =~ i ]]; then
-
 __fzfcmd() {
   [[ -n "${TMUX_PANE-}" ]] && { [[ "${FZF_TMUX:-0}" != 0 ]] || [[ -n "${FZF_TMUX_OPTS-}" ]]; } &&
     echo "fzf-tmux ${FZF_TMUX_OPTS:--d${FZF_TMUX_HEIGHT:-40%}} -- " || echo "fzf"
@@ -41,29 +46,62 @@ fzf-file-widget() {
 }
 
 __fzf_cd__() {
-  local cmd opts dir
-  cmd="${FZF_ALT_C_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/\\.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
-    -o -type d -print 2> /dev/null | cut -b3-"}"
-  opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore --reverse ${FZF_DEFAULT_OPTS-} ${FZF_ALT_C_OPTS-} +m"
-  dir=$(eval "$cmd" | FZF_DEFAULT_OPTS="$opts" $(__fzfcmd)) && printf 'builtin cd -- %q' "$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 output opts script
-  opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} -n2..,.. --scheme=history --bind=ctrl-r:toggle-sort ${FZF_CTRL_R_OPTS-} +m --read0"
-  script='BEGIN { getc; $/ = "\n\t"; $HISTCOUNT = $ENV{last_hist} + 1 } s/^[ *]//; print $HISTCOUNT - $. . "\t$_" if !$seen{$_}++'
-  output=$(
-    builtin fc -lnr -2147483648 |
-      last_hist=$(HISTTIMEFORMAT='' builtin history 1) perl -n -l0 -e "$script" |
-      FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) --query "$READLINE_LINE"
-  ) || return
-  READLINE_LINE=${output#*$'\t'}
-  if [[ -z "$READLINE_POINT" ]]; then
-    echo "$READLINE_LINE"
-  else
-    READLINE_POINT=0x7fffffff
-  fi
-}
+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
+      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
 
 # Required to refresh the prompt after fzf
 bind -m emacs-standard '"\er": redraw-current-line'
@@ -74,19 +112,23 @@ 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
-  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"'
+  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 -m emacs-standard '"\C-r": "\C-e \C-u\C-y\ey\C-u"$(__fzf_history__)"\e\C-e\er"'
+  bind -m emacs-standard '"\C-r": "\C-e \C-u\C-y\ey\C-u`__fzf_history__`\e\C-e\er"'
   bind -m vi-command '"\C-r": "\C-z\C-r\C-z"'
   bind -m vi-insert '"\C-r": "\C-z\C-r\C-z"'
 else
   # CTRL-T - Paste the selected file path into the command line
-  bind -m emacs-standard -x '"\C-t": fzf-file-widget'
-  bind -m vi-command -x '"\C-t": fzf-file-widget'
-  bind -m vi-insert -x '"\C-t": fzf-file-widget'
+  if [[ "${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
 
   # CTRL-R - Paste the selected command from history into the command line
   bind -m emacs-standard -x '"\C-r": __fzf_history__'
@@ -95,8 +137,10 @@ else
 fi
 
 # ALT-C - cd into the selected directory
-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"'
+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

@@ -11,29 +11,35 @@
 # - $FZF_ALT_C_COMMAND
 # - $FZF_ALT_C_OPTS
 
+status is-interactive; or exit 0
+
+
 # Key bindings
 # ------------
 function fzf_key_bindings
 
+  function __fzf_defaults
+    # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+    # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+    echo "--height $FZF_TMUX_HEIGHT --bind=ctrl-z:ignore" $argv[1]
+    command cat "$FZF_DEFAULT_OPTS_FILE" 2> /dev/null
+    echo $FZF_DEFAULT_OPTS $argv[2]
+  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 -l dir $commandline[1]
+    set -lx dir $commandline[1]
     set -l fzf_query $commandline[2]
     set -l prefix $commandline[3]
 
-    # "-path \$dir'*/\\.*'" matches hidden files/folders inside $dir but not
-    # $dir itself, even if hidden.
-    test -n "$FZF_CTRL_T_COMMAND"; or set -l FZF_CTRL_T_COMMAND "
-    command find -L \$dir -mindepth 1 \\( -path \$dir'*/\\.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' \\) -prune \
-    -o -type f -print \
-    -o -type d -print \
-    -o -type l -print 2> /dev/null | sed 's@^\./@@'"
-
     test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
     begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS"
-      eval "$FZF_CTRL_T_COMMAND | "(__fzfcmd)' -m --query "'$fzf_query'"' | while read -l r; set result $result $r; end
+      set -lx FZF_DEFAULT_OPTS (__fzf_defaults "--reverse --walker=file,dir,follow,hidden --scheme=path --walker-root='$dir'" "$FZF_CTRL_T_OPTS")
+      set -lx FZF_DEFAULT_COMMAND "$FZF_CTRL_T_COMMAND"
+      set -lx FZF_DEFAULT_OPTS_FILE ''
+      eval (__fzfcmd)' -m --query "'$fzf_query'"' | while read -l r; set result $result $r; end
     end
     if [ -z "$result" ]
       commandline -f repaint
@@ -53,19 +59,31 @@ function fzf_key_bindings
   function fzf-history-widget -d "Show command history"
     test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
     begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT $FZF_DEFAULT_OPTS --scheme=history --bind=ctrl-r:toggle-sort,ctrl-z:ignore $FZF_CTRL_R_OPTS +m"
-
       set -l FISH_MAJOR (echo $version | cut -f1 -d.)
       set -l FISH_MINOR (echo $version | cut -f2 -d.)
 
+      # merge history from other sessions before searching
+      if test -z "$fish_private_mode"
+        builtin history merge
+      end
+
       # history's -z flag is needed for multi-line support.
       # history's -z flag was added in fish 2.4.0, so don't use it for versions
       # before 2.4.0.
       if [ "$FISH_MAJOR" -gt 2 -o \( "$FISH_MAJOR" -eq 2 -a "$FISH_MINOR" -ge 4 \) ];
-        history -z | eval (__fzfcmd) --read0 --print0 -q '(commandline)' | read -lz result
-        and commandline -- $result
+        if type -P perl > /dev/null 2>&1
+          set -lx FZF_DEFAULT_OPTS (__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --wrap-sign '"\t"↳ ' --highlight-line $FZF_CTRL_R_OPTS +m")
+          set -lx FZF_DEFAULT_OPTS_FILE ''
+          builtin history -z --reverse | command perl -0 -pe 's/^/$.\t/g; s/\n/\n\t/gm' | eval (__fzfcmd) --tac --read0 --print0 -q '(commandline)' | command perl -pe 's/^\d*\t//' | read -lz result
+          and commandline -- $result
+        else
+          set -lx FZF_DEFAULT_OPTS (__fzf_defaults "" "--scheme=history --bind=ctrl-r:toggle-sort --wrap-sign '"\t"↳ ' --highlight-line $FZF_CTRL_R_OPTS +m")
+          set -lx FZF_DEFAULT_OPTS_FILE ''
+          builtin history -z | eval (__fzfcmd) --read0 --print0 -q '(commandline)' | read -lz result
+          and commandline -- $result
+        end
       else
-        history | eval (__fzfcmd) -q '(commandline)' | read -l result
+        builtin history | eval (__fzfcmd) -q '(commandline)' | read -l result
         and commandline -- $result
       end
     end
@@ -74,17 +92,16 @@ function fzf_key_bindings
 
   function fzf-cd-widget -d "Change directory"
     set -l commandline (__fzf_parse_commandline)
-    set -l dir $commandline[1]
+    set -lx dir $commandline[1]
     set -l fzf_query $commandline[2]
     set -l prefix $commandline[3]
 
-    test -n "$FZF_ALT_C_COMMAND"; or set -l FZF_ALT_C_COMMAND "
-    command find -L \$dir -mindepth 1 \\( -path \$dir'*/\\.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' \\) -prune \
-    -o -type d -print 2> /dev/null | sed 's@^\./@@'"
     test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
     begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS"
-      eval "$FZF_ALT_C_COMMAND | "(__fzfcmd)' +m --query "'$fzf_query'"' | read -l result
+      set -lx FZF_DEFAULT_OPTS (__fzf_defaults "--reverse --walker=dir,follow,hidden --scheme=path --walker-root='$dir'" "$FZF_ALT_C_OPTS")
+      set -lx FZF_DEFAULT_OPTS_FILE ''
+      set -lx FZF_DEFAULT_COMMAND "$FZF_ALT_C_COMMAND"
+      eval (__fzfcmd)' +m --query "'$fzf_query'"' | read -l result
 
       if [ -n "$result" ]
         cd -- $result
@@ -110,14 +127,22 @@ function fzf_key_bindings
     end
   end
 
-  bind \ct fzf-file-widget
   bind \cr fzf-history-widget
-  bind \ec fzf-cd-widget
+  if not set -q FZF_CTRL_T_COMMAND; or test -n "$FZF_CTRL_T_COMMAND"
+    bind \ct fzf-file-widget
+  end
+  if not set -q FZF_ALT_C_COMMAND; or test -n "$FZF_ALT_C_COMMAND"
+    bind \ec fzf-cd-widget
+  end
 
   if bind -M insert > /dev/null 2>&1
-    bind -M insert \ct fzf-file-widget
     bind -M insert \cr fzf-history-widget
-    bind -M insert \ec fzf-cd-widget
+    if not set -q FZF_CTRL_T_COMMAND; or test -n "$FZF_CTRL_T_COMMAND"
+      bind -M insert \ct fzf-file-widget
+    end
+    if not set -q FZF_ALT_C_COMMAND; or test -n "$FZF_ALT_C_COMMAND"
+      bind -M insert \ec fzf-cd-widget
+    end
   end
 
   function __fzf_parse_commandline -d 'Parse the current command line token and return split of existing filepath, fzf query, and optional -option= prefix'

shell/key-bindings.zsh

@@ -11,6 +11,7 @@
 # - $FZF_ALT_C_COMMAND
 # - $FZF_ALT_C_OPTS
 
+
 # Key bindings
 # ------------
 
@@ -32,22 +33,27 @@ else
   }
 fi
 
-'emulate' 'zsh' '-o' 'no_aliases'
+'builtin' 'emulate' 'zsh' && 'builtin' 'setopt' 'no_aliases'
 
 {
+if [[ -o interactive ]]; then
 
-[[ -o interactive ]] || return 0
+__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%} --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo "${FZF_DEFAULT_OPTS-} $2"
+}
 
 # CTRL-T - Paste the selected file path(s) into the command line
-__fsel() {
-  local cmd="${FZF_CTRL_T_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/\\.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
-    -o -type f -print \
-    -o -type d -print \
-    -o -type l -print 2> /dev/null | cut -b3-"}"
+__fzf_select() {
   setopt localoptions pipefail no_aliases 2> /dev/null
   local item
-  eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_CTRL_T_OPTS-}" $(__fzfcmd) -m "$@" | while read item; do
-    echo -n "${(q)item} "
+  FZF_DEFAULT_COMMAND=${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
@@ -60,50 +66,66 @@ __fzfcmd() {
 }
 
 fzf-file-widget() {
-  LBUFFER="${LBUFFER}$(__fsel)"
+  LBUFFER="${LBUFFER}$(__fzf_select)"
   local ret=$?
   zle reset-prompt
   return $ret
 }
-zle     -N            fzf-file-widget
-bindkey -M emacs '^T' fzf-file-widget
-bindkey -M vicmd '^T' fzf-file-widget
-bindkey -M viins '^T' fzf-file-widget
+if [[ "${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="${FZF_ALT_C_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/\\.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
-    -o -type d -print 2> /dev/null | cut -b3-"}"
   setopt localoptions pipefail no_aliases 2> /dev/null
-  local dir="$(eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_ALT_C_OPTS-}" $(__fzfcmd) +m)"
+  local dir="$(
+    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}"
+  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
   return $ret
 }
-zle     -N             fzf-cd-widget
-bindkey -M emacs '\ec' fzf-cd-widget
-bindkey -M vicmd '\ec' fzf-cd-widget
-bindkey -M viins '\ec' fzf-cd-widget
+if [[ "${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 noposixbuiltins pipefail no_aliases 2> /dev/null
-  selected=( $(fc -rl 1 | awk '{ cmd=$0; sub(/^[ \t]*[0-9]+\**[ \t]+/, "", cmd); if (!seen[cmd]++) print $0 }' |
-    FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} ${FZF_DEFAULT_OPTS-} -n2..,.. --scheme=history --bind=ctrl-r:toggle-sort,ctrl-z:ignore ${FZF_CTRL_R_OPTS-} --query=${(qqq)LBUFFER} +m" $(__fzfcmd)) )
+  local selected
+  setopt localoptions noglobsubst noposixbuiltins pipefail no_aliases noglob nobash_rematch 2> /dev/null
+  # Ensure the associative history array, which maps event numbers to the full
+  # history lines, is loaded, and that Perl is installed for multi-line output.
+  if zmodload -F zsh/parameter p: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 reset-prompt
@@ -113,6 +135,7 @@ 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

src/LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2013-2023 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/actiontype_string.go

@@ -0,0 +1,135 @@
+// 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[actChar-4]
+	_ = x[actMouse-5]
+	_ = x[actBeginningOfLine-6]
+	_ = x[actAbort-7]
+	_ = x[actAccept-8]
+	_ = x[actAcceptNonEmpty-9]
+	_ = x[actAcceptOrPrintQuery-10]
+	_ = x[actBackwardChar-11]
+	_ = x[actBackwardDeleteChar-12]
+	_ = x[actBackwardDeleteCharEof-13]
+	_ = x[actBackwardWord-14]
+	_ = x[actCancel-15]
+	_ = x[actChangeBorderLabel-16]
+	_ = x[actChangeHeader-17]
+	_ = x[actChangeMulti-18]
+	_ = x[actChangePreviewLabel-19]
+	_ = x[actChangePrompt-20]
+	_ = x[actChangeQuery-21]
+	_ = x[actClearScreen-22]
+	_ = x[actClearQuery-23]
+	_ = x[actClearSelection-24]
+	_ = x[actClose-25]
+	_ = x[actDeleteChar-26]
+	_ = x[actDeleteCharEof-27]
+	_ = x[actEndOfLine-28]
+	_ = x[actFatal-29]
+	_ = x[actForwardChar-30]
+	_ = x[actForwardWord-31]
+	_ = x[actKillLine-32]
+	_ = x[actKillWord-33]
+	_ = x[actUnixLineDiscard-34]
+	_ = x[actUnixWordRubout-35]
+	_ = x[actYank-36]
+	_ = x[actBackwardKillWord-37]
+	_ = x[actSelectAll-38]
+	_ = x[actDeselectAll-39]
+	_ = x[actToggle-40]
+	_ = x[actToggleSearch-41]
+	_ = x[actToggleAll-42]
+	_ = x[actToggleDown-43]
+	_ = x[actToggleUp-44]
+	_ = x[actToggleIn-45]
+	_ = x[actToggleOut-46]
+	_ = x[actToggleTrack-47]
+	_ = x[actToggleTrackCurrent-48]
+	_ = x[actToggleHeader-49]
+	_ = x[actToggleWrap-50]
+	_ = x[actTrackCurrent-51]
+	_ = x[actUntrackCurrent-52]
+	_ = x[actDown-53]
+	_ = x[actUp-54]
+	_ = x[actPageUp-55]
+	_ = x[actPageDown-56]
+	_ = x[actPosition-57]
+	_ = x[actHalfPageUp-58]
+	_ = x[actHalfPageDown-59]
+	_ = x[actOffsetUp-60]
+	_ = x[actOffsetDown-61]
+	_ = x[actOffsetMiddle-62]
+	_ = x[actJump-63]
+	_ = x[actJumpAccept-64]
+	_ = x[actPrintQuery-65]
+	_ = x[actRefreshPreview-66]
+	_ = x[actReplaceQuery-67]
+	_ = x[actToggleSort-68]
+	_ = x[actShowPreview-69]
+	_ = x[actHidePreview-70]
+	_ = x[actTogglePreview-71]
+	_ = x[actTogglePreviewWrap-72]
+	_ = x[actTransform-73]
+	_ = x[actTransformBorderLabel-74]
+	_ = x[actTransformHeader-75]
+	_ = x[actTransformPreviewLabel-76]
+	_ = x[actTransformPrompt-77]
+	_ = x[actTransformQuery-78]
+	_ = x[actPreview-79]
+	_ = x[actChangePreview-80]
+	_ = x[actChangePreviewWindow-81]
+	_ = x[actPreviewTop-82]
+	_ = x[actPreviewBottom-83]
+	_ = x[actPreviewUp-84]
+	_ = x[actPreviewDown-85]
+	_ = x[actPreviewPageUp-86]
+	_ = x[actPreviewPageDown-87]
+	_ = x[actPreviewHalfPageUp-88]
+	_ = x[actPreviewHalfPageDown-89]
+	_ = x[actPrevHistory-90]
+	_ = x[actPrevSelected-91]
+	_ = x[actPrint-92]
+	_ = x[actPut-93]
+	_ = x[actNextHistory-94]
+	_ = x[actNextSelected-95]
+	_ = x[actExecute-96]
+	_ = x[actExecuteSilent-97]
+	_ = x[actExecuteMulti-98]
+	_ = x[actSigStop-99]
+	_ = x[actFirst-100]
+	_ = x[actLast-101]
+	_ = x[actReload-102]
+	_ = x[actReloadSync-103]
+	_ = x[actDisableSearch-104]
+	_ = x[actEnableSearch-105]
+	_ = x[actSelect-106]
+	_ = x[actDeselect-107]
+	_ = x[actUnbind-108]
+	_ = x[actRebind-109]
+	_ = x[actBecome-110]
+	_ = x[actShowHeader-111]
+	_ = x[actHideHeader-112]
+}
+
+const _actionType_name = "actIgnoreactStartactClickactInvalidactCharactMouseactBeginningOfLineactAbortactAcceptactAcceptNonEmptyactAcceptOrPrintQueryactBackwardCharactBackwardDeleteCharactBackwardDeleteCharEofactBackwardWordactCancelactChangeBorderLabelactChangeHeaderactChangeMultiactChangePreviewLabelactChangePromptactChangeQueryactClearScreenactClearQueryactClearSelectionactCloseactDeleteCharactDeleteCharEofactEndOfLineactFatalactForwardCharactForwardWordactKillLineactKillWordactUnixLineDiscardactUnixWordRuboutactYankactBackwardKillWordactSelectAllactDeselectAllactToggleactToggleSearchactToggleAllactToggleDownactToggleUpactToggleInactToggleOutactToggleTrackactToggleTrackCurrentactToggleHeaderactToggleWrapactTrackCurrentactUntrackCurrentactDownactUpactPageUpactPageDownactPositionactHalfPageUpactHalfPageDownactOffsetUpactOffsetDownactOffsetMiddleactJumpactJumpAcceptactPrintQueryactRefreshPreviewactReplaceQueryactToggleSortactShowPreviewactHidePreviewactTogglePreviewactTogglePreviewWrapactTransformactTransformBorderLabelactTransformHeaderactTransformPreviewLabelactTransformPromptactTransformQueryactPreviewactChangePreviewactChangePreviewWindowactPreviewTopactPreviewBottomactPreviewUpactPreviewDownactPreviewPageUpactPreviewPageDownactPreviewHalfPageUpactPreviewHalfPageDownactPrevHistoryactPrevSelectedactPrintactPutactNextHistoryactNextSelectedactExecuteactExecuteSilentactExecuteMultiactSigStopactFirstactLastactReloadactReloadSyncactDisableSearchactEnableSearchactSelectactDeselectactUnbindactRebindactBecomeactShowHeaderactHideHeader"
+
+var _actionType_index = [...]uint16{0, 9, 17, 25, 35, 42, 50, 68, 76, 85, 102, 123, 138, 159, 183, 198, 207, 227, 242, 256, 277, 292, 306, 320, 333, 350, 358, 371, 387, 399, 407, 421, 435, 446, 457, 475, 492, 499, 518, 530, 544, 553, 568, 580, 593, 604, 615, 627, 641, 662, 677, 690, 705, 722, 729, 734, 743, 754, 765, 778, 793, 804, 817, 832, 839, 852, 865, 882, 897, 910, 924, 938, 954, 974, 986, 1009, 1027, 1051, 1069, 1086, 1096, 1112, 1134, 1147, 1163, 1175, 1189, 1205, 1223, 1243, 1265, 1279, 1294, 1302, 1308, 1322, 1337, 1347, 1363, 1378, 1388, 1396, 1403, 1412, 1425, 1441, 1456, 1465, 1476, 1485, 1494, 1503, 1516, 1529}
+
+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

@@ -152,7 +152,13 @@ var (
 	// Extra bonus for word boundary after slash, colon, semi-colon, and comma
 	bonusBoundaryDelimiter int16 = bonusBoundary + 1
 
-	initialCharClass charClass = charWhite
+	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
@@ -187,6 +193,27 @@ func Init(scheme string) bool {
 	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
 }
 
@@ -214,21 +241,6 @@ func alloc32(offset int, slab *util.Slab, size int) (int, []int32) {
 	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
-	} else if strings.IndexRune(whiteChars, char) >= 0 {
-		return charWhite
-	} else if strings.IndexRune(delimiterChars, char) >= 0 {
-		return charDelimiter
-	}
-	return charNonWord
-}
-
 func charClassOfNonAscii(char rune) charClass {
 	if unicode.IsLower(char) {
 		return charLower
@@ -240,7 +252,7 @@ func charClassOfNonAscii(char rune) charClass {
 		return charLetter
 	} else if unicode.IsSpace(char) {
 		return charWhite
-	} else if strings.IndexRune(delimiterChars, char) >= 0 {
+	} else if strings.ContainsRune(delimiterChars, char) {
 		return charDelimiter
 	}
 	return charNonWord
@@ -248,31 +260,36 @@ func charClassOfNonAscii(char rune) charClass {
 
 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 class > charNonWord {
-		if prevClass == charWhite {
+		switch prevClass {
+		case charWhite:
 			// Word boundary after whitespace
 			return bonusBoundaryWhite
-		} else if prevClass == charDelimiter {
+		case charDelimiter:
 			// Word boundary after a delimiter character
 			return bonusBoundaryDelimiter
-		} else if prevClass == charNonWord {
+		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
-	} else if class == charWhite {
+	case charWhite:
 		return bonusBoundaryWhite
 	}
 	return 0
@@ -282,7 +299,7 @@ func bonusAt(input *util.Chars, idx int) int16 {
 	if idx == 0 {
 		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 {
@@ -335,30 +352,45 @@ func isAscii(runes []rune) bool {
 	return true
 }
 
-func asciiFuzzyIndex(input *util.Chars, pattern []rune, caseSensitive bool) int {
+func asciiFuzzyIndex(input *util.Chars, pattern []rune, caseSensitive bool) (int, int) {
 	// Can't determine
 	if !input.IsBytes() {
-		return 0
+		return 0, input.Length()
 	}
 
 	// Not possible
 	if !isAscii(pattern) {
-		return -1
+		return -1, -1
 	}
 
-	firstIdx, idx := 0, 0
+	firstIdx, idx, lastIdx := 0, 0, 0
+	var b byte
 	for pidx := 0; pidx < len(pattern); pidx++ {
-		idx = trySkip(input, caseSensitive, byte(pattern[pidx]), idx)
+		b = byte(pattern[pidx])
+		idx = trySkip(input, caseSensitive, b, idx)
 		if idx < 0 {
-			return -1
+			return -1, -1
 		}
 		if pidx == 0 && idx > 0 {
 			// Step back to find the right bonus point
 			firstIdx = idx - 1
 		}
+		lastIdx = idx
 		idx++
 	}
-	return firstIdx
+
+	// 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) {
@@ -407,6 +439,9 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input *util.
 		return Result{0, 0, 0}, posArray(withPos, M)
 	}
 	N := input.Length()
+	if M > N {
+		return Result{-1, -1, 0}, nil
+	}
 
 	// Since O(nm) algorithm can be prohibitively expensive for large input,
 	// we fall back to the greedy algorithm.
@@ -415,10 +450,12 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input *util.
 	}
 
 	// Phase 1. Optimized search for ASCII string
-	idx := asciiFuzzyIndex(input, pattern, caseSensitive)
-	if idx < 0 {
+	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
@@ -431,20 +468,19 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input *util.
 	offset32, F := alloc32(offset32, slab, M)
 	// Rune array
 	_, T := alloc32(offset32, slab, N)
-	input.CopyRunes(T)
+	input.CopyRunes(T, minIdx)
 
 	// 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
-	Tsub := T[idx:]
-	H0sub, C0sub, Bsub := H0[idx:][:len(Tsub)], C0[idx:][:len(Tsub)], B[idx:][:len(Tsub)]
-	for off, char := range Tsub {
+	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)
@@ -454,28 +490,28 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input *util.
 			if normalize {
 				char = normalizeRune(char)
 			}
+			T[off] = char
 		}
 
-		Tsub[off] = char
-		bonus := bonusFor(prevClass, class)
-		Bsub[off] = bonus
+		bonus := bonusMatrix[prevClass][class]
+		B[off] = bonus
 		prevClass = class
 
 		if char == pchar {
 			if pidx < M {
-				F[pidx] = int32(idx + off)
+				F[pidx] = int32(off)
 				pidx++
 				pchar = pattern[util.Min(pidx, M-1)]
 			}
-			lastIdx = idx + off
+			lastIdx = off
 		}
 
 		if char == pchar0 {
 			score := scoreMatch + bonus*bonusFirstCharMultiplier
-			H0sub[off] = score
-			C0sub[off] = 1
+			H0[off] = score
+			C0[off] = 1
 			if M == 1 && (forward && score > maxScore || !forward && score >= maxScore) {
-				maxScore, maxScorePos = score, idx+off
+				maxScore, maxScorePos = score, off
 				if forward && bonus >= bonusBoundary {
 					break
 				}
@@ -483,24 +519,24 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input *util.
 			inGap = false
 		} else {
 			if inGap {
-				H0sub[off] = util.Max16(prevH0+scoreGapExtension, 0)
+				H0[off] = util.Max16(prevH0+scoreGapExtension, 0)
 			} else {
-				H0sub[off] = util.Max16(prevH0+scoreGapStart, 0)
+				H0[off] = util.Max16(prevH0+scoreGapStart, 0)
 			}
-			C0sub[off] = 0
+			C0[off] = 0
 			inGap = true
 		}
-		prevH0 = H0sub[off]
+		prevH0 = H0[off]
 	}
 	if pidx != M {
 		return Result{-1, -1, 0}, nil
 	}
 	if M == 1 {
-		result := Result{maxScorePos, maxScorePos + 1, int(maxScore)}
+		result := Result{minIdx + maxScorePos, minIdx + maxScorePos + 1, int(maxScore)}
 		if !withPos {
 			return result, nil
 		}
-		pos := []int{maxScorePos}
+		pos := []int{minIdx + maxScorePos}
 		return result, &pos
 	}
 
@@ -597,7 +633,7 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input *util.
 			}
 
 			if s > s1 && (s > s2 || s == s2 && preferMatch) {
-				*pos = append(*pos, j)
+				*pos = append(*pos, j+minIdx)
 				if i == 0 {
 					break
 				}
@@ -610,7 +646,7 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input *util.
 	// 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
@@ -640,7 +676,7 @@ func calculateScore(caseSensitive bool, normalize bool, text *util.Chars, patter
 				*pos = append(*pos, idx)
 			}
 			score += scoreMatch
-			bonus := bonusFor(prevClass, class)
+			bonus := bonusMatrix[prevClass][class]
 			if consecutive == 0 {
 				firstBonus = bonus
 			} else {
@@ -678,7 +714,8 @@ func FuzzyMatchV1(caseSensitive bool, normalize bool, forward bool, text *util.C
 	if len(pattern) == 0 {
 		return Result{0, 0, 0}, nil
 	}
-	if asciiFuzzyIndex(text, pattern, caseSensitive) < 0 {
+	idx, _ := asciiFuzzyIndex(text, pattern, caseSensitive)
+	if idx < 0 {
 		return Result{-1, -1, 0}, nil
 	}
 
@@ -761,6 +798,14 @@ func FuzzyMatchV1(caseSensitive bool, normalize bool, forward bool, text *util.C
 // 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) {
+	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
 	}
@@ -772,7 +817,8 @@ func ExactMatchNaive(caseSensitive bool, normalize bool, forward bool, text *uti
 		return Result{-1, -1, 0}, nil
 	}
 
-	if asciiFuzzyIndex(text, pattern, caseSensitive) < 0 {
+	idx, _ := asciiFuzzyIndex(text, pattern, caseSensitive)
+	if idx < 0 {
 		return Result{-1, -1, 0}, nil
 	}
 
@@ -794,10 +840,22 @@ func ExactMatchNaive(caseSensitive bool, normalize bool, forward bool, text *uti
 		}
 		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 {
@@ -823,7 +881,23 @@ func ExactMatchNaive(caseSensitive bool, normalize bool, forward bool, text *uti
 			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

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)
 }

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

src/ansi.go

@@ -1,6 +1,7 @@
 package fzf
 
 import (
+	"fmt"
 	"strconv"
 	"strings"
 	"unicode/utf8"
@@ -13,22 +14,28 @@ 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 || s.lbg >= 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 && s.lbg == t.lbg
+	return s.fg == t.fg && s.bg == t.bg && s.attr == t.attr && s.lbg == t.lbg && s.url == t.url
 }
 
 func (s *ansiState) ToString() string {
@@ -60,7 +67,11 @@ func (s *ansiState) ToString() string {
 	}
 	ret += toAnsiString(s.fg, 30) + toAnsiString(s.bg, 40)
 
-	return "\x1b[" + strings.TrimSuffix(ret, ";") + "m"
+	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 {
@@ -98,10 +109,19 @@ func matchOperatingSystemCommand(s string) int {
 		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
 }
 
@@ -292,7 +312,7 @@ func extractColor(str string, state *ansiState, proc func(string, *ansiState) bo
 
 func parseAnsiCode(s string, delimiter byte) (int, byte, string) {
 	var remaining string
-	i := -1
+	var i int
 	if delimiter == 0 {
 		// Faster than strings.IndexAny(";:")
 		i = strings.IndexByte(s, ';')
@@ -312,7 +332,7 @@ func parseAnsiCode(s string, delimiter byte) (int, byte, string) {
 		// Inlined version of strconv.Atoi() that only handles positive
 		// integers and does not allocate on error.
 		code := 0
-		for _, ch := range []byte(s) {
+		for _, ch := range stringBytes(s) {
 			ch -= '0'
 			if ch > 9 {
 				return -1, delimiter, remaining
@@ -328,13 +348,21 @@ func parseAnsiCode(s string, delimiter byte) (int, byte, string) {
 func interpretCode(ansiCode string, prevState *ansiState) ansiState {
 	var state ansiState
 	if prevState == nil {
-		state = ansiState{-1, -1, 0, -1}
+		state = ansiState{-1, -1, 0, -1, nil}
 	} else {
-		state = ansiState{prevState.fg, prevState.bg, prevState.attr, prevState.lbg}
+		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 ansiCode == "\x1b]8;;\x1b\\" { // End of a hyperlink
+			state.url = nil
+		} else if strings.HasPrefix(ansiCode, "\x1b]8;") && strings.HasSuffix(ansiCode, "\x1b\\") {
+			if paramsEnd := strings.IndexRune(ansiCode[4:], ';'); paramsEnd >= 0 {
+				params := ansiCode[4 : 4+paramsEnd]
+				uri := ansiCode[5+paramsEnd : len(ansiCode)-2]
+				state.url = &url{uri: uri, params: params}
+			}
 		}
 		return state
 	}
@@ -350,10 +378,12 @@ func interpretCode(ansiCode string, prevState *ansiState) ansiState {
 	state256 := 0
 	ptr := &state.fg
 
-	var delimiter byte = 0
+	var delimiter byte
+	count := 0
 	for len(ansiCode) != 0 {
 		var num int
 		if num, delimiter, ansiCode = parseAnsiCode(ansiCode, delimiter); num != -1 {
+			count++
 			switch state256 {
 			case 0:
 				switch num {
@@ -381,10 +411,19 @@ func interpretCode(ansiCode string, prevState *ansiState) ansiState {
 					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:
 					state.fg = -1
 					state.bg = -1
@@ -426,6 +465,13 @@ 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

@@ -342,12 +342,15 @@ func TestAnsiCodeStringConversion(t *testing.T) {
 		state := interpretCode(code, prevState)
 		if expected != state.ToString() {
 			t.Errorf("expected: %s, actual: %s",
-				strings.Replace(expected, "\x1b[", "\\x1b[", -1),
-				strings.Replace(state.ToString(), "\x1b[", "\\x1b[", -1))
+				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")

src/cache.go

@@ -12,8 +12,22 @@ 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

src/chunklist.go

@@ -16,14 +16,16 @@ type ChunkList struct {
 	chunks []*Chunk
 	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{},
 		mutex:  sync.Mutex{},
-		trans:  trans}
+		trans:  trans,
+		cache:  cache}
 }
 
 func (c *Chunk) push(trans ItemBuilder, data []byte) bool {
@@ -48,7 +50,12 @@ func CountItems(cs []*Chunk) int {
 	if len(cs) == 0 {
 		return 0
 	}
-	return chunkSize*(len(cs)-1) + cs[len(cs)-1].count
+	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
@@ -72,18 +79,56 @@ func (cl *ChunkList) Clear() {
 }
 
 // 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()
 
+	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 {
+		if tail > 0 && cnt > 1 {
+			newChunk := *ret[0]
+			ret[0] = &newChunk
+		}
 		newChunk := *ret[cnt-1]
 		ret[cnt-1] = &newChunk
 	}
 
 	cl.mutex.Unlock()
-	return ret, CountItems(ret)
+	return ret, CountItems(ret), changed
 }

src/chunklist_test.go

@@ -11,13 +11,13 @@ func TestChunkList(t *testing.T) {
 	// FIXME global
 	sortCriteria = []criterion{byScore, byLength}
 
-	cl := NewChunkList(func(item *Item, s []byte) bool {
+	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")
 	}
@@ -32,7 +32,7 @@ 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")
 	}
@@ -61,7 +61,7 @@ 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")
@@ -78,3 +78,39 @@ func TestChunkList(t *testing.T) {
 		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

@@ -2,7 +2,6 @@ package fzf
 
 import (
 	"math"
-	"os"
 	"time"
 
 	"github.com/junegunn/fzf/src/util"
@@ -15,6 +14,7 @@ const (
 
 	// Reader
 	readerBufferSize       = 64 * 1024
+	readerSlabSize         = 128 * 1024
 	readerPollIntervalMin  = 10 * time.Millisecond
 	readerPollIntervalStep = 5 * time.Millisecond
 	readerPollIntervalMax  = 50 * time.Millisecond
@@ -54,16 +54,6 @@ const (
 	defaultJumpLabels string = "asdfghjklqwertyuiopzxcvbnm1234567890ASDFGHJKLQWERTYUIOPZXCVBNM`~;:,<.>/?'\"!@#$%^&*()[{]}-_=+"
 )
 
-var defaultCommand string
-
-func init() {
-	if !util.IsWindows() {
-		defaultCommand = `set -o pipefail; command find -L . -mindepth 1 \( -path '*/\.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \) -prune -o -type f -print -o -type l -print 2> /dev/null | cut -b3-`
-	} else if os.Getenv("TERM") == "cygwin" {
-		defaultCommand = `sh -c "command find -L . -mindepth 1 -path '*/\.*' -prune -o -type f -print -o -type l -print 2> /dev/null | cut -b3-"`
-	}
-}
-
 // fzf events
 const (
 	EvtReadNew util.EventType = iota
@@ -77,9 +67,9 @@ const (
 )
 
 const (
-	exitCancel    = -1
-	exitOk        = 0
-	exitNoMatch   = 1
-	exitError     = 2
-	exitInterrupt = 130
+	ExitOk        = 0
+	ExitNoMatch   = 1
+	ExitError     = 2
+	ExitBecome    = 126
+	ExitInterrupt = 130
 )

src/core.go

@@ -2,8 +2,8 @@
 package fzf
 
 import (
-	"fmt"
 	"os"
+	"sync"
 	"time"
 
 	"github.com/junegunn/fzf/src/util"
@@ -18,20 +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, version string, revision string) {
+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 {
-		if len(revision) > 0 {
-			fmt.Printf("%s (%s)\n", version, revision)
-		} else {
-			fmt.Println(version)
-		}
-		os.Exit(exitOk)
-	}
-
 	// Event channel
 	eventBox := util.NewEventBox()
 
@@ -45,28 +77,29 @@ func Run(opts *Options, version string, revision string) {
 		if opts.Theme.Colored {
 			ansiProcessor = func(data []byte) (util.Chars, *[]ansiOffset) {
 				prevLineAnsiState = lineAnsiState
-				trimmed, offsets, newState := extractColor(string(data), lineAnsiState, nil)
+				trimmed, offsets, newState := extractColor(byteString(data), lineAnsiState, nil)
 				lineAnsiState = newState
-				return util.ToChars([]byte(trimmed)), offsets
+				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.ToChars([]byte(trimmed)), nil
+				trimmed, _, _ := extractColor(byteString(data), nil, nil)
+				return util.ToChars(stringBytes(trimmed)), nil
 			}
 		}
 	}
 
 	// Chunk list
+	cache := NewChunkCache()
 	var chunkList *ChunkList
 	var itemIndex int32
 	header := make([]string, 0, opts.HeaderLines)
 	if len(opts.WithNth) == 0 {
-		chunkList = NewChunkList(func(item *Item, data []byte) bool {
+		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 false
 			}
@@ -76,8 +109,8 @@ func Run(opts *Options, version string, revision string) {
 			return true
 		})
 	} else {
-		chunkList = NewChunkList(func(item *Item, data []byte) bool {
-			tokens := Tokenize(string(data), 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 {
@@ -101,7 +134,7 @@ func Run(opts *Options, version string, revision string) {
 				eventBox.Set(EvtHeader, header)
 				return false
 			}
-			item.text, item.colors = ansiProcessor([]byte(transformed))
+			item.text, item.colors = ansiProcessor(stringBytes(transformed))
 			item.text.TrimTrailingWhitespaces()
 			item.text.Index = itemIndex
 			item.origText = &data
@@ -110,14 +143,36 @@ func Run(opts *Options, version string, revision string) {
 		})
 	}
 
+	// 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 = NewReader(func(data []byte) bool {
 			return chunkList.Push(data)
-		}, eventBox, opts.ReadZero, opts.Filter == nil)
-		go reader.ReadSource()
+		}, eventBox, executor, opts.ReadZero, opts.Filter == nil)
+
+		go reader.ReadSource(opts.Input, opts.WalkerRoot, opts.WalkerOpts, opts.WalkerSkip, initialReload, initialEnv)
 	}
 
 	// Matcher
@@ -133,12 +188,15 @@ func Run(opts *Options, version string, revision string) {
 			forward = true
 		}
 	}
+	patternCache := make(map[string]*Pattern)
 	patternBuilder := func(runes []rune) *Pattern {
-		return BuildPattern(
+		return BuildPattern(cache, patternCache,
 			opts.Fuzzy, opts.FuzzyAlgo, opts.Extended, opts.Case, opts.Normalize, forward, withPos,
 			opts.Filter == nil, opts.Nth, opts.Delimiter, runes)
 	}
-	matcher := NewMatcher(patternBuilder, sort, opts.Tac, eventBox)
+	inputRevision := revision{}
+	snapshotRevision := revision{}
+	matcher := NewMatcher(cache, patternBuilder, sort, opts.Tac, eventBox, inputRevision)
 
 	// Filtering mode
 	if opts.Filter != nil {
@@ -152,23 +210,27 @@ func Run(opts *Options, version string, revision string) {
 		found := false
 		if streamingFilter {
 			slab := util.MakeSlab(slab16Size, slab32Size)
+			mutex := sync.Mutex{}
 			reader := NewReader(
 				func(runes []byte) bool {
 					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, false)
-			reader.ReadSource()
+				}, eventBox, executor, opts.ReadZero, false)
+			reader.ReadSource(opts.Input, opts.WalkerRoot, opts.WalkerOpts, opts.WalkerSkip, initialReload, initialEnv)
 		} 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})
@@ -178,9 +240,9 @@ func Run(opts *Options, version string, revision string) {
 			}
 		}
 		if found {
-			os.Exit(exitOk)
+			return ExitOk, nil
 		}
-		os.Exit(exitNoMatch)
+		return ExitNoMatch, nil
 	}
 
 	// Synchronous search
@@ -191,16 +253,16 @@ func Run(opts *Options, version string, revision string) {
 
 	// Go interactive
 	go matcher.Loop()
+	defer matcher.Stop()
 
-	// Terminal I/O
-	terminal := NewTerminal(opts, eventBox)
+	// 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(opts)
+		maxFit, padHeight = terminal.MaxFitAndPad()
 	}
-	deferred := opts.Select1 || opts.Exit0
+	deferred := opts.Select1 || opts.Exit0 || opts.Sync
 	go terminal.Loop()
 	if !deferred && !heightUnknown {
 		// Start right away
@@ -209,10 +271,9 @@ func Run(opts *Options, version string, revision string) {
 
 	// Event coordination
 	reading := true
-	clearCache := util.Once(false)
-	clearSelection := util.Once(false)
 	ticks := 0
-	var nextCommand *string
+	var nextCommand *commandSpec
+	var nextEnviron []string
 	eventBox.Watch(EvtReadNew)
 	total := 0
 	query := []rune{}
@@ -231,30 +292,24 @@ func Run(opts *Options, version string, revision string) {
 
 	useSnapshot := false
 	var snapshot []*Chunk
-	var prevSnapshot []*Chunk
 	var count int
-	restart := func(command string) {
+	restart := func(command commandSpec, environ []string) {
 		reading = true
-		clearCache = util.Once(true)
-		clearSelection = util.Once(true)
-		// We should not update snapshot if reload is triggered again while
-		// the previous reload is in progress
-		if useSnapshot && prevSnapshot != nil {
-			snapshot, count = chunkList.Snapshot()
-		}
 		chunkList.Clear()
 		itemIndex = 0
+		inputRevision.bumpMajor()
 		header = make([]string, 0, opts.HeaderLines)
-		go reader.restart(command)
+		go reader.restart(command, environ)
 	}
+
+	exitCode := ExitOk
+	stop := false
 	for {
 		delay := true
 		ticks++
-		input := func(reloaded bool) []rune {
+		input := func() []rune {
 			paused, input := terminal.Input()
-			if reloaded && paused {
-				query = []rune{}
-			} else if !paused {
+			if !paused {
 				query = input
 			}
 			return query
@@ -269,41 +324,50 @@ func Run(opts *Options, version string, revision string) {
 					if reading {
 						reader.terminate()
 					}
-					os.Exit(value.(int))
+					quitSignal := value.(quitSignal)
+					exitCode = quitSignal.code
+					err = quitSignal.err
+					stop = true
+					return
 				case EvtReadNew, EvtReadFin:
 					if evt == EvtReadFin && nextCommand != nil {
-						restart(*nextCommand)
+						restart(*nextCommand, nextEnviron)
 						nextCommand = nil
+						nextEnviron = nil
 						break
 					} else {
 						reading = reading && evt == EvtReadNew
 					}
 					if useSnapshot && evt == EvtReadFin {
 						useSnapshot = false
-						prevSnapshot = nil
 					}
 					if !useSnapshot {
-						snapshot, count = chunkList.Snapshot()
+						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 opts.Sync {
-						opts.Sync = false
-						terminal.UpdateList(PassMerger(&snapshot, opts.Tac), false)
-					}
 					if heightUnknown && !deferred {
 						determine(!reading)
 					}
-					reset := !useSnapshot && clearCache()
-					matcher.Reset(snapshot, input(reset), false, !reading, sort, reset)
+					matcher.Reset(snapshot, input(), false, !reading, sort, snapshotRevision)
 
 				case EvtSearchNew:
-					var command *string
+					var command *commandSpec
+					var environ []string
 					var changed bool
 					switch val := value.(type) {
 					case searchRequest:
 						sort = val.sort
 						command = val.command
+						environ = val.environ
 						changed = val.changed
 						if command != nil {
 							useSnapshot = val.sync
@@ -313,24 +377,30 @@ func Run(opts *Options, version string, revision string) {
 						if reading {
 							reader.terminate()
 							nextCommand = command
+							nextEnviron = environ
 						} else {
-							restart(*command)
+							restart(*command, environ)
 						}
 					}
 					if !changed {
 						break
 					}
-					reset := false
 					if !useSnapshot {
-						newSnapshot, _ := chunkList.Snapshot()
+						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 || len(newSnapshot) > 0 {
+						if command == nil || newCount > 0 {
+							if snapshotRevision != inputRevision {
+								query = []rune{}
+							}
 							snapshot = newSnapshot
-							reset = clearCache()
+							snapshotRevision = inputRevision
 						}
 					}
-					matcher.Reset(snapshot, input(reset), true, !reading, sort, reset)
+					matcher.Reset(snapshot, input(), true, !reading, sort, snapshotRevision)
 					delay = false
 
 				case EvtSearchProgress:
@@ -362,20 +432,24 @@ func Run(opts *Options, version string, revision string) {
 									for i := 0; i < count; i++ {
 										opts.Printer(val.Get(i).item.AsString(opts.Ansi))
 									}
-									if count > 0 {
-										os.Exit(exitOk)
+									if count == 0 {
+										exitCode = ExitNoMatch
 									}
-									os.Exit(exitNoMatch)
+									stop = true
+									return
 								}
 								determine(val.final)
 							}
 						}
-						terminal.UpdateList(val, clearSelection())
+						terminal.UpdateList(val)
 					}
 				}
 			}
 			events.Clear()
 		})
+		if stop {
+			break
+		}
 		if delay && reading {
 			dur := util.DurWithin(
 				time.Duration(ticks)*coordinatorDelayStep,
@@ -383,4 +457,5 @@ func Run(opts *Options, version string, revision string) {
 			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/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 {
@@ -62,11 +61,11 @@ func (h *History) append(line string) error {
 		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

@@ -1,7 +1,6 @@
 package fzf
 
 import (
-	"io/ioutil"
 	"os"
 	"runtime"
 	"testing"
@@ -25,7 +24,7 @@ func TestHistory(t *testing.T) {
 		}
 	}
 
-	f, _ := ioutil.TempFile("", "fzf-history")
+	f, _ := os.CreateTemp("", "fzf-history")
 	f.Close()
 
 	{ // Append lines

src/item.go

@@ -1,6 +1,8 @@
 package fzf
 
 import (
+	"math"
+
 	"github.com/junegunn/fzf/src/util"
 )
 
@@ -17,7 +19,7 @@ func (item *Item) Index() int32 {
 	return item.text.Index
 }
 
-var minItem = Item{text: util.Chars{Index: -1}}
+var minItem = Item{text: util.Chars{Index: math.MinInt32}}
 
 func (item *Item) TrimLength() uint16 {
 	return item.text.TrimLength()

src/matcher.go

@@ -12,15 +12,16 @@ import (
 
 // MatchRequest represents a search request
 type MatchRequest struct {
-	chunks     []*Chunk
-	pattern    *Pattern
-	final      bool
-	sort       bool
-	clearCache 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
@@ -29,6 +30,7 @@ type Matcher struct {
 	partitions     int
 	slab           []*util.Slab
 	mergerCache    map[string]*Merger
+	revision       revision
 }
 
 const (
@@ -37,10 +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,
@@ -48,7 +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
@@ -58,8 +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
@@ -69,11 +78,19 @@ func (m *Matcher) Loop() {
 			}
 			events.Clear()
 		})
+		if stop {
+			break
+		}
 
-		if request.sort != m.sort || request.clearCache {
+		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
@@ -82,20 +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)
 		}
 
@@ -140,13 +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)
@@ -177,7 +195,7 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 			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 {
@@ -218,11 +236,11 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 		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, clearCache 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
@@ -231,5 +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 && pattern.sortable, clearCache})
+	m.reqBox.Set(event, MatchRequest{chunks, pattern, final, sort, revision})
+}
+
+func (m *Matcher) Stop() {
+	m.reqBox.Set(reqQuit, nil)
 }

src/merger.go

@@ -3,32 +3,42 @@ 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
-	pass    bool
+	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,
-		pass:    true}
+		pattern:  nil,
+		chunks:   chunks,
+		tac:      tac,
+		count:    0,
+		pass:     true,
+		revision: revision,
+		minIndex: minIndex}
 
 	for _, chunk := range *mg.chunks {
 		mg.count += chunk.count
@@ -37,17 +47,19 @@ func PassMerger(chunks *[]*Chunk, tac bool) *Merger {
 }
 
 // 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)
@@ -55,6 +67,11 @@ func NewMerger(pattern *Pattern, lists [][]Result, sorted bool, tac bool) *Merge
 	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
@@ -71,7 +88,7 @@ func (mg *Merger) First() Result {
 func (mg *Merger) FindIndex(itemIndex int32) int {
 	index := -1
 	if mg.pass {
-		index = int(itemIndex)
+		index = int(itemIndex - mg.minIndex)
 		if mg.tac {
 			index = mg.count - index - 1
 		}
@@ -92,6 +109,13 @@ func (mg *Merger) Get(idx int) Result {
 		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.items[idx%chunkSize]}
 	}

src/merger_test.go

@@ -23,10 +23,11 @@ func randResult() Result {
 }
 
 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) {
@@ -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

@@ -2,7 +2,7 @@ package fzf
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"testing"
 
 	"github.com/junegunn/fzf/src/tui"
@@ -80,7 +80,7 @@ func TestDelimiterRegexRegexCaret(t *testing.T) {
 
 func TestSplitNth(t *testing.T) {
 	{
-		ranges := splitNth("..")
+		ranges, _ := splitNth("..")
 		if len(ranges) != 1 ||
 			ranges[0].begin != rangeEllipsis ||
 			ranges[0].end != rangeEllipsis {
@@ -88,7 +88,7 @@ func TestSplitNth(t *testing.T) {
 		}
 	}
 	{
-		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 ||
@@ -106,10 +106,11 @@ func TestSplitNth(t *testing.T) {
 }
 
 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: %v", opts.Nth)
@@ -118,7 +119,7 @@ func TestIrrelevantNth(t *testing.T) {
 	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: %v", opts.Nth)
@@ -127,7 +128,7 @@ func TestIrrelevantNth(t *testing.T) {
 		{
 			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: %v", opts.Nth)
@@ -137,7 +138,7 @@ func TestIrrelevantNth(t *testing.T) {
 }
 
 func TestParseKeys(t *testing.T) {
-	pairs := parseKeyChords("ctrl-z,alt-z,f2,@,Alt-a,!,ctrl-G,J,g,ctrl-alt-a,ALT-enter,alt-SPACE", "")
+	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)
@@ -163,35 +164,35 @@ func TestParseKeys(t *testing.T) {
 	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")
 	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.AltBackspace, "Alt-BSpace")
+	check(tui.ShiftLeft, "shift-left")
+	check(tui.ShiftRight, "shift-right")
+	check(tui.ShiftTab, "shift-tab")
 	check(tui.CtrlM, "Enter")
-	check(tui.BSpace, "bspace")
+	check(tui.Backspace, "bspace")
 }
 
 func TestParseKeysWithComma(t *testing.T) {
@@ -206,40 +207,40 @@ func TestParseKeysWithComma(t *testing.T) {
 		}
 	}
 
-	pairs := parseKeyChords(",", "")
+	pairs, _ := parseKeyChords(",", "")
 	checkN(len(pairs), 1)
 	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords(",,a,b", "")
+	pairs, _ = parseKeyChords(",,a,b", "")
 	checkN(len(pairs), 3)
 	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.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.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.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.Key(','), ",")
 
-	pairs = parseKeyChords(",ALT-,,", "")
+	pairs, _ = parseKeyChords(",ALT-,,", "")
 	checkN(len(pairs), 1)
 	check(pairs, tui.AltKey(','), "ALT-,")
 }
@@ -262,17 +263,13 @@ func TestBind(t *testing.T) {
 		}
 	}
 	check(tui.CtrlA.AsEvent(), "", actBeginningOfLine)
-	errorString := ""
-	errorFn := func(e string) {
-		errorString = e
-	}
 	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", errorFn)
+			",,: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)
@@ -290,20 +287,17 @@ func TestBind(t *testing.T) {
 	check(tui.Key('+'), "++\nfoobar,Y:execute(baz)+up", actExecute)
 
 	for idx, char := range []rune{'~', '!', '@', '#', '$', '%', '^', '&', '*', '|', ';', '/'} {
-		parseKeymap(keymap, fmt.Sprintf("%d:execute%cfoobar%c", idx%10, char, char), errorFn)
+		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, "f1:abort", errorFn)
+	parseKeymap(keymap, "f1:abort")
 	check(tui.F1.AsEvent(), "", actAbort)
-	if len(errorString) > 0 {
-		t.Errorf("error parsing keymap: %s", errorString)
-	}
 }
 
 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")
 	}
@@ -311,7 +305,7 @@ 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")
 	}
@@ -322,7 +316,7 @@ func TestColorSpec(t *testing.T) {
 		t.Errorf("point should not be equivalent")
 	}
 
-	customized := parseTheme(theme, "fg:231,bg:232")
+	customized, _ := parseTheme(theme, "fg:231,bg:232")
 	if customized.Fg.Color != 231 || customized.Bg.Color != 232 {
 		t.Errorf("color not customized")
 	}
@@ -335,17 +329,18 @@ 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 TestDefaultCtrlNP(t *testing.T) {
+	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[e][0].t != expected {
 			t.Error()
@@ -357,7 +352,7 @@ 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)
@@ -371,8 +366,9 @@ func TestDefaultCtrlNP(t *testing.T) {
 }
 
 func optsFor(words ...string) *Options {
+	index := 0
 	opts := defaultOptions()
-	parseOptions(opts, words)
+	parseOptions(&index, opts, words)
 	postProcessOptions(opts)
 	return opts
 }
@@ -458,7 +454,6 @@ func TestValidateSign(t *testing.T) {
 		{"> ", true},
 		{"아", true},
 		{"😀", true},
-		{"", false},
 		{">>>", false},
 	}
 
@@ -475,7 +470,7 @@ func TestValidateSign(t *testing.T) {
 }
 
 func TestParseSingleActionList(t *testing.T) {
-	actions := parseSingleActionList("Execute@foo+bar,baz@+up+up+reload:down+down", func(string) {})
+	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))
 	}
@@ -491,11 +486,8 @@ func TestParseSingleActionList(t *testing.T) {
 }
 
 func TestParseSingleActionListError(t *testing.T) {
-	err := ""
-	parseSingleActionList("change-query(foobar)baz", func(e string) {
-		err = e
-	})
-	if len(err) == 0 {
+	_, err := parseSingleActionList("change-query(foobar)baz")
+	if err == nil {
 		t.Errorf("Failed to detect error")
 	}
 }

src/pattern.go

@@ -23,6 +23,7 @@ type termType int
 const (
 	termFuzzy termType = iota
 	termExact
+	termExactBoundary
 	termPrefix
 	termSuffix
 	termEqual
@@ -60,32 +61,17 @@ type Pattern struct {
 	delimiter     Delimiter
 	nth           []Range
 	procFun       map[termType]algo.Algo
+	cache         *ChunkCache
 }
 
-var (
-	_patternCache map[string]*Pattern
-	_splitRegex   *regexp.Regexp
-	_cache        ChunkCache
-)
+var _splitRegex *regexp.Regexp
 
 func init() {
 	_splitRegex = regexp.MustCompile(" +")
-	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()
 }
 
 // BuildPattern builds Pattern object from the given arguments
-func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case, normalize bool, forward bool,
+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, runes []rune) *Pattern {
 
 	var asString string
@@ -98,7 +84,9 @@ func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case,
 		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
 	}
@@ -153,28 +141,30 @@ func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case,
 		cacheable:     cacheable,
 		nth:           nth,
 		delimiter:     delimiter,
+		cache:         cache,
 		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.Replace(str, "\\ ", "\t", -1)
+	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, strings.Replace(token, "\t", " ", -1)
+		typ, inv, text := termFuzzy, false, strings.ReplaceAll(token, "\t", " ")
 		lowerText := strings.ToLower(text)
 		caseSensitive := caseMode == CaseRespect ||
 			caseMode == CaseSmart && text != lowerText
@@ -205,15 +195,17 @@ func parseTerms(fuzzy bool, caseMode Case, normalize bool, str string) []termSet
 			text = text[:len(text)-1]
 		}
 
-		if strings.HasPrefix(text, "'") {
+		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 typ == termSuffix {
 				typ = termEqual
@@ -283,18 +275,18 @@ func (p *Pattern) Match(chunk *Chunk, slab *util.Slab) []Result {
 	// ChunkCache: Exact match
 	cacheKey := p.CacheKey()
 	if p.cacheable {
-		if cached := _cache.Lookup(chunk, cacheKey); cached != nil {
+		if cached := p.cache.Lookup(chunk, cacheKey); cached != nil {
 			return cached
 		}
 	}
 
 	// Prefix/suffix cache
-	space := _cache.Search(chunk, cacheKey)
+	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
 }

src/pattern_test.go

@@ -64,10 +64,15 @@ func TestParseTermsEmpty(t *testing.T) {
 	}
 }
 
+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, runes)
+}
+
 func TestExact(t *testing.T) {
-	defer clearPatternCache()
-	clearPatternCache()
-	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, 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(
@@ -81,9 +86,7 @@ func TestExact(t *testing.T) {
 }
 
 func TestEqual(t *testing.T) {
-	defer clearPatternCache()
-	clearPatternCache()
-	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, 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))
@@ -104,19 +107,12 @@ func TestEqual(t *testing.T) {
 }
 
 func TestCaseSensitivity(t *testing.T) {
-	defer clearPatternCache()
-	clearPatternCache()
-	pat1 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
-	clearPatternCache()
-	pat2 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
-	clearPatternCache()
-	pat3 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
-	clearPatternCache()
-	pat4 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
-	clearPatternCache()
-	pat5 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
-	clearPatternCache()
-	pat6 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, false, 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 ||
@@ -129,7 +125,7 @@ func TestCaseSensitivity(t *testing.T) {
 }
 
 func TestOrigTextAndTransformed(t *testing.T) {
-	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("jg"))
+	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}})
 
@@ -163,15 +159,13 @@ func TestOrigTextAndTransformed(t *testing.T) {
 
 func TestCacheKey(t *testing.T) {
 	test := func(extended bool, patStr string, expected string, cacheable bool) {
-		clearPatternCache()
-		pat := BuildPattern(true, algo.FuzzyMatchV2, extended, CaseSmart, false, true, false, 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: %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)
@@ -187,15 +181,13 @@ func TestCacheKey(t *testing.T) {
 
 func TestCacheable(t *testing.T) {
 	test := func(fuzzy bool, str string, expected string, cacheable bool) {
-		clearPatternCache()
-		pat := BuildPattern(fuzzy, algo.FuzzyMatchV2, true, CaseSmart, true, true, false, true, []Range{}, Delimiter{}, []rune(str))
+		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)
 		}
-		clearPatternCache()
 	}
 	test(true, "foo bar", "foo\tbar", true)
 	test(true, "foo 'bar", "foo\tbar", false)

src/protector/protector.go

@@ -3,6 +3,4 @@
 package protector
 
 // Protect calls OS specific protections like pledge on OpenBSD
-func Protect() {
-	return
-}
+func Protect() {}

src/protector/protector_openbsd.go

@@ -6,5 +6,5 @@ import "golang.org/x/sys/unix"
 
 // Protect calls OS specific protections like pledge on OpenBSD
 func Protect() {
-	unix.PledgePromises("stdio rpath tty proc exec")
+	unix.PledgePromises("stdio dpath wpath rpath tty proc exec inet tmppath")
 }

src/proxy.go

@@ -0,0 +1,158 @@
+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 string
+	commandPrefix += ` --no-force-tty-in --proxy-script "$0"`
+	if opts.Input == nil && (opts.ForceTtyIn || util.IsTty(os.Stdin)) {
+		command = fmt.Sprintf(`%s > %q`, commandPrefix, output)
+	} else {
+		input, err := fifo("proxy-input")
+		if err != nil {
+			return ExitError, err
+		}
+		defer os.Remove(input)
+
+		go func() {
+			withInputPipe(input, func(inputFile io.WriteCloser) {
+				if opts.Input == nil {
+					io.Copy(inputFile, os.Stdin)
+				} else {
+					for item := range opts.Input {
+						fmt.Fprint(inputFile, item+opts.PrintSep)
+					}
+				}
+			})
+		}()
+
+		if withExports {
+			command = fmt.Sprintf(`%s < %q > %q`, commandPrefix, input, output)
+		} else {
+			// For mintty: cannot directly read named pipe from Go code
+			command = fmt.Sprintf(`command cat %q | %s > %q`, input, commandPrefix, output)
+		}
+	}
+
+	// To ensure that the options are processed by a POSIX-compliant shell,
+	// we need to write the command to a temporary file and execute it with sh.
+	var exports []string
+	needBash := false
+	if withExports {
+		validIdentifier := regexp.MustCompile(`^[a-zA-Z_][a-zA-Z0-9_]*$`)
+		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()
+				if err != nil {
+					return ExitError, err
+				}
+				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

@@ -1,9 +1,10 @@
 package fzf
 
 import (
-	"bufio"
+	"bytes"
 	"context"
 	"io"
+	"io/fs"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -11,27 +12,29 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/charlievieth/fastwalk"
 	"github.com/junegunn/fzf/src/util"
-	"github.com/saracen/walker"
 )
 
 // 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
 	exec     *exec.Cmd
+	execOut  io.ReadCloser
 	command  *string
 	killed   bool
 	wait     bool
 }
 
 // NewReader returns new Reader object
-func NewReader(pusher func([]byte) bool, eventBox *util.EventBox, delimNil bool, wait bool) *Reader {
-	return &Reader{pusher, eventBox, delimNil, int32(EvtReady), make(chan bool, 1), sync.Mutex{}, nil, nil, false, wait}
+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{}, nil, nil, nil, false, wait}
 }
 
 func (r *Reader) startEventPoller() {
@@ -76,39 +79,51 @@ func (r *Reader) fin(success bool) {
 
 func (r *Reader) terminate() {
 	r.mutex.Lock()
-	defer func() { r.mutex.Unlock() }()
-
 	r.killed = true
 	if r.exec != nil && r.exec.Process != nil {
+		r.execOut.Close()
 		util.KillCommand(r.exec)
-	} else if defaultCommand != "" {
+	} else {
 		os.Stdin.Close()
 	}
+	r.mutex.Unlock()
 }
 
-func (r *Reader) restart(command string) {
+func (r *Reader) restart(command commandSpec, environ []string) {
 	r.event = int32(EvtReady)
 	r.startEventPoller()
-	success := r.readFromCommand(nil, command)
+	success := r.readFromCommand(command.command, environ)
 	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() {
+func (r *Reader) ReadSource(inputChan chan string, root string, opts walkerOpts, ignores []string, initCmd string, initEnv []string) {
 	r.startEventPoller()
 	var success bool
-	if util.IsTty() {
-		// The default command for *nix requires bash
-		shell := "bash"
+	if inputChan != nil {
+		success = r.readChannel(inputChan)
+	} else if len(initCmd) > 0 {
+		success = r.readFromCommand(initCmd, initEnv)
+	} else if util.IsTty(os.Stdin) {
 		cmd := os.Getenv("FZF_DEFAULT_COMMAND")
 		if len(cmd) == 0 {
-			if defaultCommand != "" {
-				success = r.readFromCommand(&shell, defaultCommand)
-			} else {
-				success = r.readFiles()
-			}
+			success = r.readFiles(root, opts, ignores)
 		} else {
-			success = r.readFromCommand(nil, cmd)
+			success = r.readFromCommand(cmd, initEnv)
 		}
 	} else {
 		success = r.readFromStdin()
@@ -117,32 +132,90 @@ func (r *Reader) ReadSource() {
 }
 
 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 byteaLen > 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) {
-				atomic.StoreInt32(&r.event, int32(EvtReadNew))
+		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))
 	}
 }
 
@@ -151,16 +224,57 @@ func (r *Reader) readFromStdin() bool {
 	return true
 }
 
-func (r *Reader) readFiles() bool {
+func isSymlinkToDir(path string, de os.DirEntry) bool {
+	if de.Type()&fs.ModeSymlink == 0 {
+		return false
+	}
+	if s, err := os.Stat(path); err == nil {
+		return s.IsDir()
+	}
+	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(root string, opts walkerOpts, ignores []string) bool {
 	r.killed = false
-	fn := func(path string, mode os.FileInfo) error {
-		path = filepath.Clean(path)
+	conf := fastwalk.Config{
+		Follow: opts.follow,
+		// Use forward slashes when running a Windows binary under WSL or MSYS
+		ToSlash: fastwalk.DefaultToSlash(),
+		Sort:    fastwalk.SortFilesFirst,
+	}
+	fn := func(path string, de os.DirEntry, err error) error {
+		if err != nil {
+			return nil
+		}
+		path = trimPath(path)
 		if path != "." {
-			isDir := mode.Mode().IsDir()
-			if isDir && filepath.Base(path)[0] == '.' {
-				return filepath.SkipDir
+			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 ignores {
+					if ignore == base {
+						return filepath.SkipDir
+					}
+				}
 			}
-			if !isDir && r.pusher([]byte(path)) {
+			if ((opts.file && !isDir) || (opts.dir && isDir)) && r.pusher(stringBytes(path)) {
 				atomic.StoreInt32(&r.event, int32(EvtReadNew))
 			}
 		}
@@ -171,31 +285,34 @@ func (r *Reader) readFiles() bool {
 		}
 		return nil
 	}
-	cb := walker.WithErrorCallback(func(pathname string, err error) error {
-		return nil
-	})
-	return walker.Walk(".", fn, cb) == nil
+	return fastwalk.Walk(&conf, root, fn) == nil
 }
 
-func (r *Reader) readFromCommand(shell *string, command string) bool {
+func (r *Reader) readFromCommand(command string, environ []string) bool {
 	r.mutex.Lock()
 	r.killed = false
 	r.command = &command
-	if shell != nil {
-		r.exec = util.ExecCommandWith(*shell, command, true)
-	} else {
-		r.exec = util.ExecCommand(command, true)
+	r.exec = r.executor.ExecCommand(command, true)
+	if environ != nil {
+		r.exec.Env = environ
 	}
-	out, err := r.exec.StdoutPipe()
+
+	var err error
+	r.execOut, err = r.exec.StdoutPipe()
 	if err != nil {
+		r.exec = nil
 		r.mutex.Unlock()
 		return false
 	}
+
 	err = r.exec.Start()
-	r.mutex.Unlock()
 	if err != nil {
+		r.exec = nil
+		r.mutex.Unlock()
 		return false
 	}
-	r.feed(out)
+
+	r.mutex.Unlock()
+	r.feed(r.execOut)
 	return r.exec.Wait() == nil
 }

src/reader_test.go

@@ -10,9 +10,10 @@ import (
 func TestReadFromCommand(t *testing.T) {
 	strs := []string{}
 	eb := util.NewEventBox()
+	exec := util.NewExecutor("")
 	reader := NewReader(
 		func(s []byte) bool { strs = append(strs, string(s)); return true },
-		eb, false, true)
+		eb, exec, false, true)
 
 	reader.startEventPoller()
 
@@ -22,7 +23,7 @@ func TestReadFromCommand(t *testing.T) {
 	}
 
 	// Normal command
-	reader.fin(reader.readFromCommand(nil, `echo abc&&echo def`))
+	reader.fin(reader.readFromCommand(`echo abc&&echo def`, nil))
 	if len(strs) != 2 || strs[0] != "abc" || strs[1] != "def" {
 		t.Errorf("%s", strs)
 	}
@@ -47,7 +48,7 @@ func TestReadFromCommand(t *testing.T) {
 	reader.startEventPoller()
 
 	// Failing command
-	reader.fin(reader.readFromCommand(nil, `no-such-command`))
+	reader.fin(reader.readFromCommand(`no-such-command`, nil))
 	strs = []string{}
 	if len(strs) > 0 {
 		t.Errorf("%s", strs)

src/result.go

@@ -15,6 +15,8 @@ type Offset [2]int32
 type colorOffset struct {
 	offset [2]int32
 	color  tui.ColorPair
+	match  bool
+	url    *url
 }
 
 type Result struct {
@@ -80,7 +82,7 @@ func buildResult(item *Item, offsets []Offset, score int) Result {
 				if criterion == byBegin {
 					val = util.AsUint16(minEnd - whitePrefixLen)
 				} else {
-					val = util.AsUint16(math.MaxUint16 - math.MaxUint16*(maxEnd-whitePrefixLen)/int(item.TrimLength()))
+					val = util.AsUint16(math.MaxUint16 - math.MaxUint16*(maxEnd-whitePrefixLen)/(int(item.TrimLength())+1))
 				}
 			}
 		}
@@ -109,7 +111,7 @@ func (result *Result) colorOffsets(matchOffsets []Offset, theme *tui.ColorTheme,
 	if len(itemColors) == 0 {
 		var offsets []colorOffset
 		for _, off := range matchOffsets {
-			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: colMatch})
+			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: colMatch, match: true})
 		}
 		return offsets
 	}
@@ -138,7 +140,9 @@ func (result *Result) colorOffsets(matchOffsets []Offset, theme *tui.ColorTheme,
 		for i := off[0]; i < off[1]; i++ {
 			// Negative of 1-based index of itemColors
 			// - The extra -1 means highlighted
-			cols[i] = cols[i]*-1 - 1
+			if cols[i] >= 0 {
+				cols[i] = cols[i]*-1 - 1
+			}
 		}
 	}
 
@@ -174,8 +178,11 @@ func (result *Result) colorOffsets(matchOffsets []Offset, theme *tui.ColorTheme,
 		if curr != 0 && idx > start {
 			if curr < 0 {
 				color := colMatch
+				var url *url
 				if curr < -1 && theme.Colored {
-					origColor := ansiToColorPair(itemColors[-curr-2], colMatch)
+					ansi := itemColors[-curr-2]
+					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+].
 					//
@@ -191,12 +198,14 @@ func (result *Result) colorOffsets(matchOffsets []Offset, theme *tui.ColorTheme,
 					}
 				}
 				colors = append(colors, colorOffset{
-					offset: [2]int32{int32(start), int32(idx)}, color: color})
+					offset: [2]int32{int32(start), int32(idx)}, color: color, match: true, url: url})
 			} else {
 				ansi := itemColors[curr-1]
 				colors = append(colors, colorOffset{
 					offset: [2]int32{int32(start), int32(idx)},
-					color:  ansiToColorPair(ansi, colBase)})
+					color:  ansiToColorPair(ansi, colBase),
+					match:  false,
+					url:    ansi.color.url})
 			}
 		}
 	}

src/result_test.go

@@ -120,14 +120,14 @@ func TestColorOffset(t *testing.T) {
 	//   ++++++++        ++++++++++
 	// --++++++++--    --++++++++++---
 
-	offsets := []Offset{{5, 15}, {25, 35}}
+	offsets := []Offset{{5, 15}, {10, 12}, {25, 35}}
 	item := Result{
 		item: &Item{
 			colors: &[]ansiOffset{
-				{[2]int32{0, 20}, ansiState{1, 5, 0, -1}},
-				{[2]int32{22, 27}, ansiState{2, 6, tui.Bold, -1}},
-				{[2]int32{30, 32}, ansiState{3, 7, 0, -1}},
-				{[2]int32{33, 40}, ansiState{4, 8, tui.Bold, -1}}}}}
+				{[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}}}}}
 
 	colBase := tui.NewColorPair(89, 189, tui.AttrUndefined)
 	colMatch := tui.NewColorPair(99, 199, tui.AttrUndefined)

src/server.go

@@ -3,61 +3,122 @@ 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
 )
 
-func startHttpServer(port int, channel chan []*action) (error, int) {
-	if port < 0 {
-		return nil, port
-	}
+type httpServer struct {
+	apiKey        []byte
+	actionChannel chan []*action
+	getHandler    func(getParams) string
+}
 
-	listener, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", port))
+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 fmt.Errorf("port not available: %d", port), port
+		return nil, port, fmt.Errorf("failed to listen on %s", addrStr)
 	}
 	if port == 0 {
 		addr := listener.Addr().String()
-		parts := strings.SplitN(addr, ":", 2)
+		parts := strings.Split(addr, ":")
 		if len(parts) < 2 {
-			return fmt.Errorf("cannot extract port: %s", addr), port
+			return nil, port, fmt.Errorf("cannot extract port: %s", addr)
 		}
 		var err error
-		port, err = strconv.Atoi(parts[1])
+		port, err = strconv.Atoi(parts[len(parts)-1])
 		if err != nil {
-			return err, port
+			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) {
-					break
-				} else {
-					continue
+					return
 				}
+				continue
 			}
-			conn.Write([]byte(handleHttpRequest(conn, channel)))
+			conn.Write([]byte(server.handleHttpRequest(conn)))
 			conn.Close()
 		}
-		listener.Close()
 	}()
 
-	return nil, port
+	return listener, port, nil
 }
 
 // Here we are writing a simplistic HTTP server without using net/http
@@ -66,12 +127,22 @@ func startHttpServer(port int, channel chan []*action) (error, int) {
 // * No --listen:            2.8MB
 // * --listen with net/http: 5.7MB
 // * --listen w/o net/http:  3.3MB
-func handleHttpRequest(conn net.Conn, channel chan []*action) string {
+func (server *httpServer) handleHttpRequest(conn net.Conn) string {
 	contentLength := 0
+	apiKey := ""
 	body := ""
-	bad := func(message string) string {
+	answer := func(code string, message string) string {
 		message += "\n"
-		return httpBadRequest + fmt.Sprintf("Content-Length: %d%s", len(message), crlf+crlf+message)
+		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)
@@ -92,7 +163,14 @@ func handleHttpRequest(conn net.Conn, channel chan []*action) string {
 		text := scanner.Text()
 		switch section {
 		case 0:
-			if !strings.HasPrefix(text, "POST / HTTP") {
+			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++
@@ -105,34 +183,64 @@ func handleHttpRequest(conn net.Conn, channel chan []*action) string {
 				continue
 			}
 			pair := strings.SplitN(text, ":", 2)
-			if len(pair) == 2 && strings.ToLower(pair[0]) == "content-length" {
-				length, err := strconv.Atoi(strings.TrimSpace(pair[1]))
-				if err != nil || length <= 0 || length > maxContentLength {
-					return bad("invalid content length")
+			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])
 				}
-				contentLength = length
 			}
 		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]
 
-	errorMessage := ""
-	actions := parseSingleActionList(strings.Trim(string(body), "\r\n"), func(message string) {
-		errorMessage = message
-	})
-	if len(errorMessage) > 0 {
-		return bad(errorMessage)
+	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")
 	}
 
-	channel <- actions
-	return httpOk
+	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

@@ -12,6 +12,22 @@ import (
 	"github.com/junegunn/fzf/src/util"
 )
 
+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) {
 	item1 := newItem("  foo'bar \x1b[31mbaz\x1b[m")
 	items1 := []*Item{item1, item1}
@@ -52,90 +68,90 @@ func TestReplacePlaceholder(t *testing.T) {
 	*/
 
 	// {}, preserve ansi
-	result = replacePlaceholder("echo {}", false, Delimiter{}, printsep, false, "query", items1)
+	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{}, printsep, false, "query", items1)
+	result = replacePlaceholderTest("echo {}", true, Delimiter{}, printsep, false, "query", items1)
 	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}")
 
 	// {}, with multiple items
-	result = replacePlaceholder("echo {}", true, Delimiter{}, printsep, false, "query", items2)
+	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{}, printsep, false, "query", items1)
+	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{}, printsep, false, "query", items1)
+	result = replacePlaceholderTest("echo {..}", true, Delimiter{}, printsep, false, "query", items1)
 	checkFormat("echo {{.O}}foo{{.I}}bar baz{{.O}}")
 
 	// {q}
-	result = replacePlaceholder("echo {} {q}", true, Delimiter{}, printsep, false, "query", items1)
+	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{}, printsep, false, "query 'string'", items2)
+	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 {}{q}{}", true, Delimiter{}, printsep, false, "query 'string'", items2)
+	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}/{2,1}/{-1}/{-2}/{}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, false, "query", items1)
+	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 = replacePlaceholder("echo {1}/{2}/{-1}/{-2}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, false, "query", items2)
+	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 = replacePlaceholder("echo {+1}/{+2}/{+-1}/{+-2}/{+..}/{n.t}/\\{}/\\{1}/\\{q}/{+3}", true, Delimiter{}, printsep, false, "query", items2)
+	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 = replacePlaceholder("echo {1}/{2}/{-1}/{-2}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, true, "query", items2)
+	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 = replacePlaceholder("echo {s1}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	result = replacePlaceholderTest("echo {s1}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
 	checkFormat("echo {{.O}}  foo{{.O}}")
 
-	result = replacePlaceholder("echo {s2}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	result = replacePlaceholderTest("echo {s2}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
 	checkFormat("echo {{.O}}bar baz{{.O}}")
 
-	result = replacePlaceholder("echo {s}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	result = replacePlaceholderTest("echo {s}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
 	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}")
 
-	result = replacePlaceholder("echo {s..}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	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 = replacePlaceholder("echo {s1}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	result = replacePlaceholderTest("echo {s1}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
 	checkFormat("echo {{.O}}  {{.O}}")
 
-	result = replacePlaceholder("echo {s2}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	result = replacePlaceholderTest("echo {s2}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
 	checkFormat("echo {{.O}}{{.I}}{{.O}}")
 
-	result = replacePlaceholder("echo {s3}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	result = replacePlaceholderTest("echo {s3}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
 	checkFormat("echo {{.O}} {{.O}}")
 
 	// No match
-	result = replacePlaceholder("echo {}/{+}", true, Delimiter{}, printsep, false, "query", []*Item{nil, nil})
+	result = replacePlaceholderTest("echo {}/{+}", true, Delimiter{}, printsep, false, "query", []*Item{nil, nil})
 	check("echo /")
 
 	// No match, but with selections
-	result = replacePlaceholder("echo {}/{+}", true, Delimiter{}, printsep, false, "query", []*Item{nil, item1})
+	result = replacePlaceholderTest("echo {}/{+}", true, Delimiter{}, printsep, false, "query", []*Item{nil, item1})
 	checkFormat("echo /{{.O}}  foo{{.I}}bar baz{{.O}}")
 
 	// String delimiter
-	result = replacePlaceholder("echo {}/{1}/{2}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	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]+")
 	// foo'bar baz
-	result = replacePlaceholder("echo {}/{1}/{3}/{2..3}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	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}}")
 
 	/*
@@ -155,7 +171,6 @@ func TestReplacePlaceholder(t *testing.T) {
 		newItem("7a 7b 7c 7d 7e 7f"),
 	}
 	stripAnsi := false
-	printsep = "\n"
 	forcePlus := false
 	query := "sample query"
 
@@ -198,18 +213,23 @@ func TestReplacePlaceholder(t *testing.T) {
 	// 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 = replacePlaceholder(giveTemplate, stripAnsi, Delimiter{}, printsep, forcePlus, query, items3)
+		result = replacePlaceholderTest(giveTemplate, stripAnsi, Delimiter{}, printsep, forcePlus, query, items3)
 		checkFormat(wantOutput)
 	}
 	for giveTemplate, wantOutput := range templateToFile {
-		path := replacePlaceholder(giveTemplate, stripAnsi, Delimiter{}, printsep, forcePlus, query, items3)
+		path := replacePlaceholderTest(giveTemplate, stripAnsi, Delimiter{}, printsep, forcePlus, query, items3)
 
 		data, err := readFile(path)
 		if err != nil {
@@ -226,6 +246,7 @@ func TestQuoteEntry(t *testing.T) {
 	unixStyle := quotes{``, `'`, `'\''`, `"`, `\`}
 	windowsStyle := quotes{`^`, `^"`, `'`, `\^"`, `\\`}
 	var effectiveStyle quotes
+	exec := util.NewExecutor("")
 
 	if util.IsWindows() {
 		effectiveStyle = windowsStyle
@@ -260,7 +281,7 @@ func TestQuoteEntry(t *testing.T) {
 	}
 
 	for input, expected := range tests {
-		escaped := quoteEntry(input)
+		escaped := exec.QuoteEntry(input)
 		expected = templateToString(expected, effectiveStyle)
 		if escaped != expected {
 			t.Errorf("Input: %s, expected: %s, actual %s", input, expected, escaped)
@@ -299,9 +320,9 @@ func TestUnixCommands(t *testing.T) {
 
 // purpose of this test is to demonstrate some shortcomings of fzf's templating system on Windows
 func TestWindowsCommands(t *testing.T) {
-	if !util.IsWindows() {
-		t.SkipNow()
-	}
+	// XXX Deprecated
+	t.SkipNow()
+
 	tests := []testCase{
 		// reference: give{template, query, items}, want{output OR match}
 
@@ -563,7 +584,7 @@ func testCommands(t *testing.T, tests []testCase) {
 
 	// evaluate the test cases
 	for idx, test := range tests {
-		gotOutput := replacePlaceholder(
+		gotOutput := replacePlaceholderTest(
 			test.give.template, stripAnsi, delimiter, printsep, forcePlus,
 			test.give.query,
 			test.give.allItems)
@@ -605,7 +626,7 @@ func (flags placeholderFlags) encodePlaceholder() string {
 	if flags.file {
 		encoded += "f"
 	}
-	if flags.query {
+	if flags.forceUpdate { // FIXME
 		encoded += "q"
 	}
 	return encoded

src/terminal_unix.go

@@ -5,8 +5,9 @@ package fzf
 import (
 	"os"
 	"os/signal"
-	"strings"
 	"syscall"
+
+	"golang.org/x/sys/unix"
 )
 
 func notifyOnResize(resizeChan chan<- os.Signal) {
@@ -14,13 +15,10 @@ func notifyOnResize(resizeChan chan<- os.Signal) {
 }
 
 func notifyStop(p *os.Process) {
-	p.Signal(syscall.SIGSTOP)
-}
-
-func notifyOnCont(resizeChan chan<- os.Signal) {
-	signal.Notify(resizeChan, syscall.SIGCONT)
-}
-
-func quoteEntry(entry string) string {
-	return "'" + strings.Replace(entry, "'", "'\\''", -1) + "'"
+	pid := p.Pid
+	pgid, err := unix.Getpgid(pid)
+	if err == nil {
+		pid = pgid * -1
+	}
+	unix.Kill(pid, syscall.SIGTSTP)
 }

src/terminal_windows.go

@@ -4,8 +4,6 @@ package fzf
 
 import (
 	"os"
-	"regexp"
-	"strings"
 )
 
 func notifyOnResize(resizeChan chan<- os.Signal) {
@@ -15,31 +13,3 @@ func notifyOnResize(resizeChan chan<- os.Signal) {
 func notifyStop(p *os.Process) {
 	// NOOP
 }
-
-func notifyOnCont(resizeChan chan<- os.Signal) {
-	// NOOP
-}
-
-func quoteEntry(entry string) string {
-	shell := os.Getenv("SHELL")
-	if len(shell) == 0 {
-		shell = "cmd"
-	}
-
-	if strings.Contains(shell, "cmd") {
-		// backslash escaping is done here for applications
-		// (see ripgrep test case in terminal_test.go#TestWindowsCommands)
-		escaped := strings.Replace(entry, `\`, `\\`, -1)
-		escaped = `"` + strings.Replace(escaped, `"`, `\"`, -1) + `"`
-		// caret is the escape character for cmd shell
-		r, _ := regexp.Compile(`[&|<>()@^%!"]`)
-		return r.ReplaceAllStringFunc(escaped, func(match string) string {
-			return "^" + match
-		})
-	} else if strings.Contains(shell, "pwsh") || strings.Contains(shell, "powershell") {
-		escaped := strings.Replace(entry, `"`, `\"`, -1)
-		return "'" + strings.Replace(escaped, "'", "''", -1) + "'"
-	} else {
-		return "'" + strings.Replace(entry, "'", "'\\''", -1) + "'"
-	}
-}

src/tmux.go

@@ -0,0 +1,60 @@
+package fzf
+
+import (
+	"os"
+	"os/exec"
+
+	"github.com/junegunn/fzf/src/tui"
+)
+
+func runTmux(args []string, opts *Options) (int, error) {
+	// Prepare arguments
+	fzf := args[0]
+	args = append([]string{"--bind=ctrl-z:ignore"}, args[1:]...)
+	if opts.BorderShape == tui.BorderUndefined {
+		args = append(args, "--border")
+	}
+	argStr := escapeSingleQuote(fzf)
+	for _, arg := range args {
+		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", "-B", "-d", dir}
+	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

@@ -91,7 +91,7 @@ func withPrefixLengths(tokens []string, begin int) []Token {
 
 	prefixLength := begin
 	for idx := range tokens {
-		chars := util.ToChars([]byte(tokens[idx]))
+		chars := util.ToChars(stringBytes(tokens[idx]))
 		ret[idx] = Token{&chars, int32(prefixLength)}
 		prefixLength += chars.Length()
 	}
@@ -187,7 +187,7 @@ func Transform(tokens []Token, withNth []Range) []Token {
 		if r.begin == r.end {
 			idx := r.begin
 			if idx == rangeEllipsis {
-				chars := util.ToChars([]byte(joinTokens(tokens)))
+				chars := util.ToChars(stringBytes(joinTokens(tokens)))
 				parts = append(parts, &chars)
 			} else {
 				if idx < 0 {

src/tokenizer_test.go

@@ -71,14 +71,14 @@ func TestTransform(t *testing.T) {
 	{
 		tokens := Tokenize(input, Delimiter{})
 		{
-			ranges := splitNth("1,2,3")
+			ranges, _ := splitNth("1,2,3")
 			tx := Transform(tokens, ranges)
 			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:  " ||
 				len(tx) != 4 ||
@@ -93,7 +93,7 @@ func TestTransform(t *testing.T) {
 	{
 		tokens := Tokenize(input, delimiterRegexp(":"))
 		{
-			ranges := splitNth("1..2,3,2..,1")
+			ranges, _ := splitNth("1..2,3,2..,1")
 			tx := Transform(tokens, ranges)
 			if joinTokens(tx) != "  abc:  def:  ghi:  def:  ghi:  jkl  abc:" ||
 				len(tx) != 4 ||
@@ -108,5 +108,6 @@ func TestTransform(t *testing.T) {
 }
 
 func TestTransformIndexOutOfBounds(t *testing.T) {
-	Transform([]Token{}, splitNth("1"))
+	s, _ := splitNth("1")
+	Transform([]Token{}, s)
 }

src/tui/dummy.go

@@ -8,7 +8,7 @@ func HasFullscreenRenderer() bool {
 	return false
 }
 
-var DefaultBorderShape BorderShape = BorderRounded
+var DefaultBorderShape = BorderRounded
 
 func (a Attr) Merge(b Attr) Attr {
 	return a | b
@@ -29,16 +29,20 @@ const (
 	StrikeThrough = Attr(1 << 7)
 )
 
-func (r *FullscreenRenderer) Init()                              {}
+func (r *FullscreenRenderer) Init() error                        { 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) 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 }
 

src/tui/eventtype_string.go

@@ -0,0 +1,122 @@
+// 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[CtrlM-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[Mouse-76]
+	_ = x[DoubleClick-77]
+	_ = x[LeftClick-78]
+	_ = x[RightClick-79]
+	_ = x[SLeftClick-80]
+	_ = x[SRightClick-81]
+	_ = x[ScrollUp-82]
+	_ = x[ScrollDown-83]
+	_ = x[SScrollUp-84]
+	_ = x[SScrollDown-85]
+	_ = x[PreviewScrollUp-86]
+	_ = x[PreviewScrollDown-87]
+	_ = x[Resize-88]
+	_ = x[Change-89]
+	_ = x[BackwardEOF-90]
+	_ = x[Start-91]
+	_ = x[Load-92]
+	_ = x[Focus-93]
+	_ = x[One-94]
+	_ = x[Zero-95]
+	_ = x[Result-96]
+	_ = x[Jump-97]
+	_ = x[JumpCancel-98]
+	_ = x[ClickHeader-99]
+}
+
+const _EventType_name = "RuneCtrlACtrlBCtrlCCtrlDCtrlECtrlFCtrlGCtrlHTabCtrlJCtrlKCtrlLCtrlMCtrlNCtrlOCtrlPCtrlQCtrlRCtrlSCtrlTCtrlUCtrlVCtrlWCtrlXCtrlYCtrlZEscCtrlSpaceCtrlDeleteCtrlBackSlashCtrlRightBracketCtrlCaretCtrlSlashShiftTabBackspaceDeletePageUpPageDownUpDownLeftRightHomeEndInsertShiftUpShiftDownShiftLeftShiftRightShiftDeleteF1F2F3F4F5F6F7F8F9F10F11F12AltBackspaceAltUpAltDownAltLeftAltRightAltShiftUpAltShiftDownAltShiftLeftAltShiftRightAltCtrlAltInvalidFatalMouseDoubleClickLeftClickRightClickSLeftClickSRightClickScrollUpScrollDownSScrollUpSScrollDownPreviewScrollUpPreviewScrollDownResizeChangeBackwardEOFStartLoadFocusOneZeroResultJumpJumpCancelClickHeader"
+
+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, 452, 463, 472, 482, 492, 503, 511, 521, 530, 541, 556, 573, 579, 585, 596, 601, 605, 610, 613, 617, 623, 627, 637, 648}
+
+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]]
+}

src/tui/light.go

@@ -2,6 +2,7 @@ package tui
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"os"
 	"regexp"
@@ -10,7 +11,7 @@ import (
 	"time"
 	"unicode/utf8"
 
-	"github.com/mattn/go-runewidth"
+	"github.com/junegunn/fzf/src/util"
 	"github.com/rivo/uniseg"
 
 	"golang.org/x/term"
@@ -28,8 +29,12 @@ const (
 
 const consoleDevice string = "/dev/tty"
 
-var offsetRegexp *regexp.Regexp = regexp.MustCompile("(.*)\x1b\\[([0-9]+);([0-9]+)R")
-var offsetRegexpBegin *regexp.Regexp = regexp.MustCompile("^\x1b\\[[0-9]+;[0-9]+R")
+var offsetRegexp = regexp.MustCompile("(.*)\x1b\\[([0-9]+);([0-9]+)R")
+var offsetRegexpBegin = regexp.MustCompile("^\x1b\\[[0-9]+;[0-9]+R")
+
+func (r *LightRenderer) PassThrough(str string) {
+	r.queued.WriteString("\x1b7" + str + "\x1b8")
+}
 
 func (r *LightRenderer) stderr(str string) {
 	r.stderrInternal(str, true, "")
@@ -68,13 +73,14 @@ func (r *LightRenderer) csi(code string) string {
 
 func (r *LightRenderer) flush() {
 	if r.queued.Len() > 0 {
-		fmt.Fprint(os.Stderr, "\x1b[?25l"+r.queued.String()+"\x1b[?25h")
+		fmt.Fprint(r.ttyout, "\x1b[?7l\x1b[?25l"+r.queued.String()+"\x1b[?25h\x1b[?7h")
 		r.queued.Reset()
 	}
 }
 
 // Light renderer
 type LightRenderer struct {
+	closed        *util.AtomicBool
 	theme         *ColorTheme
 	mouse         bool
 	forceBlack    bool
@@ -82,6 +88,7 @@ type LightRenderer struct {
 	prevDownTime  time.Time
 	clicks        [][2]int
 	ttyin         *os.File
+	ttyout        *os.File
 	buffer        []byte
 	origState     *term.State
 	width         int
@@ -120,19 +127,25 @@ type LightWindow struct {
 	bg       Color
 }
 
-func NewLightRenderer(theme *ColorTheme, forceBlack bool, mouse bool, tabstop int, clearOnExit bool, fullscreen bool, maxHeightFunc func(int) int) Renderer {
+func NewLightRenderer(ttyin *os.File, theme *ColorTheme, forceBlack bool, mouse bool, tabstop int, clearOnExit bool, fullscreen bool, maxHeightFunc func(int) int) (Renderer, error) {
+	out, err := openTtyOut()
+	if err != nil {
+		out = os.Stderr
+	}
 	r := LightRenderer{
+		closed:        util.NewAtomicBool(false),
 		theme:         theme,
 		forceBlack:    forceBlack,
 		mouse:         mouse,
 		clearOnExit:   clearOnExit,
-		ttyin:         openTtyIn(),
+		ttyin:         ttyin,
+		ttyout:        out,
 		yoffset:       0,
 		tabstop:       tabstop,
 		fullscreen:    fullscreen,
 		upOneLine:     false,
 		maxHeightFunc: maxHeightFunc}
-	return &r
+	return &r, nil
 }
 
 func repeat(r rune, times int) string {
@@ -150,11 +163,11 @@ func atoi(s string, defaultValue int) int {
 	return value
 }
 
-func (r *LightRenderer) Init() {
+func (r *LightRenderer) Init() error {
 	r.escDelay = atoi(os.Getenv("ESCDELAY"), defaultEscDelay)
 
 	if err := r.initPlatform(); err != nil {
-		errorExit(err.Error())
+		return err
 	}
 	r.updateTerminalSize()
 	initTheme(r.theme, r.defaultTheme(), r.forceBlack)
@@ -192,6 +205,7 @@ func (r *LightRenderer) Init() {
 	if !r.fullscreen && r.mouse {
 		r.yoffset, _ = r.findOffset()
 	}
+	return nil
 }
 
 func (r *LightRenderer) Resize(maxHeightFunc func(int) int) {
@@ -230,19 +244,20 @@ func getEnv(name string, defaultValue int) int {
 	return atoi(env, defaultValue)
 }
 
-func (r *LightRenderer) getBytes() []byte {
-	return r.getBytesInternal(r.buffer, false)
+func (r *LightRenderer) getBytes() ([]byte, error) {
+	bytes, err := r.getBytesInternal(r.buffer, false)
+	return bytes, err
 }
 
-func (r *LightRenderer) getBytesInternal(buffer []byte, nonblock bool) []byte {
+func (r *LightRenderer) getBytesInternal(buffer []byte, nonblock bool) ([]byte, error) {
 	c, ok := r.getch(nonblock)
 	if !nonblock && !ok {
 		r.Close()
-		errorExit("Failed to read " + consoleDevice)
+		return nil, errors.New("failed to read " + consoleDevice)
 	}
 
 	retries := 0
-	if c == ESC.Int() || nonblock {
+	if c == Esc.Int() || nonblock {
 		retries = r.escDelay / escPollInterval
 	}
 	buffer = append(buffer, byte(c))
@@ -257,7 +272,7 @@ func (r *LightRenderer) getBytesInternal(buffer []byte, nonblock bool) []byte {
 				continue
 			}
 			break
-		} else if c == ESC.Int() && pc != c {
+		} else if c == Esc.Int() && pc != c {
 			retries = r.escDelay / escPollInterval
 		} else {
 			retries = 0
@@ -269,19 +284,23 @@ func (r *LightRenderer) getBytesInternal(buffer []byte, nonblock bool) []byte {
 		// so terminate fzf immediately.
 		if len(buffer) > maxInputBuffer {
 			r.Close()
-			panic(fmt.Sprintf("Input buffer overflow (%d): %v", len(buffer), buffer))
+			return nil, fmt.Errorf("input buffer overflow (%d): %v", len(buffer), buffer)
 		}
 	}
 
-	return buffer
+	return buffer, nil
 }
 
 func (r *LightRenderer) GetChar() Event {
+	var err error
 	if len(r.buffer) == 0 {
-		r.buffer = r.getBytes()
+		r.buffer, err = r.getBytes()
+		if err != nil {
+			return Event{Fatal, 0, nil}
+		}
 	}
 	if len(r.buffer) == 0 {
-		panic("Empty buffer")
+		return Event{Fatal, 0, nil}
 	}
 
 	sz := 1
@@ -297,7 +316,7 @@ func (r *LightRenderer) GetChar() Event {
 	case CtrlQ.Byte():
 		return Event{CtrlQ, 0, nil}
 	case 127:
-		return Event{BSpace, 0, nil}
+		return Event{Backspace, 0, nil}
 	case 0:
 		return Event{CtrlSpace, 0, nil}
 	case 28:
@@ -308,11 +327,13 @@ func (r *LightRenderer) GetChar() Event {
 		return Event{CtrlCaret, 0, nil}
 	case 31:
 		return Event{CtrlSlash, 0, nil}
-	case ESC.Byte():
+	case Esc.Byte():
 		ev := r.escSequence(&sz)
 		// Second chance
 		if ev.Type == Invalid {
-			r.buffer = r.getBytes()
+			if r.buffer, err = r.getBytes(); err != nil {
+				return Event{Fatal, 0, nil}
+			}
 			ev = r.escSequence(&sz)
 		}
 		return ev
@@ -324,7 +345,7 @@ func (r *LightRenderer) GetChar() Event {
 	}
 	char, rsz := utf8.DecodeRune(r.buffer)
 	if char == utf8.RuneError {
-		return Event{ESC, 0, nil}
+		return Event{Esc, 0, nil}
 	}
 	sz = rsz
 	return Event{Rune, char, nil}
@@ -332,7 +353,7 @@ func (r *LightRenderer) GetChar() Event {
 
 func (r *LightRenderer) escSequence(sz *int) Event {
 	if len(r.buffer) < 2 {
-		return Event{ESC, 0, nil}
+		return Event{Esc, 0, nil}
 	}
 
 	loc := offsetRegexpBegin.FindIndex(r.buffer)
@@ -346,15 +367,15 @@ func (r *LightRenderer) escSequence(sz *int) Event {
 		return CtrlAltKey(rune(r.buffer[1] + 'a' - 1))
 	}
 	alt := false
-	if len(r.buffer) > 2 && r.buffer[1] == ESC.Byte() {
+	if len(r.buffer) > 2 && r.buffer[1] == Esc.Byte() {
 		r.buffer = r.buffer[1:]
 		alt = true
 	}
 	switch r.buffer[1] {
-	case ESC.Byte():
-		return Event{ESC, 0, nil}
+	case Esc.Byte():
+		return Event{Esc, 0, nil}
 	case 127:
-		return Event{AltBS, 0, nil}
+		return Event{AltBackspace, 0, nil}
 	case '[', 'O':
 		if len(r.buffer) < 3 {
 			return Event{Invalid, 0, nil}
@@ -383,7 +404,7 @@ func (r *LightRenderer) escSequence(sz *int) Event {
 			}
 			return Event{Up, 0, nil}
 		case 'Z':
-			return Event{BTab, 0, nil}
+			return Event{ShiftTab, 0, nil}
 		case 'H':
 			return Event{Home, 0, nil}
 		case 'F':
@@ -398,7 +419,7 @@ func (r *LightRenderer) escSequence(sz *int) Event {
 			return Event{F3, 0, nil}
 		case 'S':
 			return Event{F4, 0, nil}
-		case '1', '2', '3', '4', '5', '6':
+		case '1', '2', '3', '4', '5', '6', '7', '8':
 			if len(r.buffer) < 4 {
 				return Event{Invalid, 0, nil}
 			}
@@ -431,7 +452,7 @@ func (r *LightRenderer) escSequence(sz *int) Event {
 				return Event{Invalid, 0, nil} // INS
 			case '3':
 				if r.buffer[3] == '~' {
-					return Event{Del, 0, nil}
+					return Event{Delete, 0, nil}
 				}
 				if len(r.buffer) == 6 && r.buffer[5] == '~' {
 					*sz = 6
@@ -439,16 +460,20 @@ func (r *LightRenderer) escSequence(sz *int) Event {
 					case '5':
 						return Event{CtrlDelete, 0, nil}
 					case '2':
-						return Event{SDelete, 0, nil}
+						return Event{ShiftDelete, 0, nil}
 					}
 				}
 				return Event{Invalid, 0, nil}
 			case '4':
 				return Event{End, 0, nil}
 			case '5':
-				return Event{PgUp, 0, nil}
+				return Event{PageUp, 0, nil}
 			case '6':
-				return Event{PgDn, 0, nil}
+				return Event{PageDown, 0, nil}
+			case '7':
+				return Event{Home, 0, nil}
+			case '8':
+				return Event{End, 0, nil}
 			case '1':
 				switch r.buffer[3] {
 				case '~':
@@ -482,16 +507,29 @@ func (r *LightRenderer) escSequence(sz *int) Event {
 					}
 					*sz = 6
 					switch r.buffer[4] {
-					case '1', '2', '3', '5':
+					case '1', '2', '3', '4', '5':
+						//                   Kitty      iTerm2     WezTerm
+						// SHIFT-ARROW       "\e[1;2D"
+						// ALT-SHIFT-ARROW   "\e[1;4D"  "\e[1;10D" "\e[1;4D"
+						// CTRL-SHIFT-ARROW  "\e[1;6D"             N/A
+						// CMD-SHIFT-ARROW   "\e[1;10D" N/A        N/A ("\e[1;2D")
 						alt := r.buffer[4] == '3'
-						altShift := r.buffer[4] == '1' && r.buffer[5] == '0'
 						char := r.buffer[5]
-						if altShift {
+						altShift := false
+						if r.buffer[4] == '1' && r.buffer[5] == '0' {
+							altShift = true
 							if len(r.buffer) < 7 {
 								return Event{Invalid, 0, nil}
 							}
 							*sz = 7
 							char = r.buffer[6]
+						} else if r.buffer[4] == '4' {
+							altShift = true
+							if len(r.buffer) < 6 {
+								return Event{Invalid, 0, nil}
+							}
+							*sz = 6
+							char = r.buffer[5]
 						}
 						switch char {
 						case 'A':
@@ -499,33 +537,33 @@ func (r *LightRenderer) escSequence(sz *int) Event {
 								return Event{AltUp, 0, nil}
 							}
 							if altShift {
-								return Event{AltSUp, 0, nil}
+								return Event{AltShiftUp, 0, nil}
 							}
-							return Event{SUp, 0, nil}
+							return Event{ShiftUp, 0, nil}
 						case 'B':
 							if alt {
 								return Event{AltDown, 0, nil}
 							}
 							if altShift {
-								return Event{AltSDown, 0, nil}
+								return Event{AltShiftDown, 0, nil}
 							}
-							return Event{SDown, 0, nil}
+							return Event{ShiftDown, 0, nil}
 						case 'C':
 							if alt {
 								return Event{AltRight, 0, nil}
 							}
 							if altShift {
-								return Event{AltSRight, 0, nil}
+								return Event{AltShiftRight, 0, nil}
 							}
-							return Event{SRight, 0, nil}
+							return Event{ShiftRight, 0, nil}
 						case 'D':
 							if alt {
 								return Event{AltLeft, 0, nil}
 							}
 							if altShift {
-								return Event{AltSLeft, 0, nil}
+								return Event{AltShiftLeft, 0, nil}
 							}
-							return Event{SLeft, 0, nil}
+							return Event{ShiftLeft, 0, nil}
 						}
 					} // r.buffer[4]
 				} // r.buffer[3]
@@ -687,6 +725,10 @@ func (r *LightRenderer) NeedScrollbarRedraw() bool {
 	return false
 }
 
+func (r *LightRenderer) ShouldEmitResizeEvent() bool {
+	return false
+}
+
 func (r *LightRenderer) RefreshWindows(windows []Window) {
 	r.flush()
 }
@@ -714,6 +756,11 @@ func (r *LightRenderer) Close() {
 	r.flush()
 	r.closePlatform()
 	r.restoreTerminal()
+	r.closed.Set(true)
+}
+
+func (r *LightRenderer) Top() int {
+	return r.yoffset
 }
 
 func (r *LightRenderer) MaxX() int {
@@ -747,17 +794,24 @@ func (r *LightRenderer) NewWindow(top int, left int, width int, height int, prev
 		w.fg = r.theme.Fg.Color
 		w.bg = r.theme.Bg.Color
 	}
+	if !w.bg.IsDefault() && w.border.shape != BorderNone {
+		w.Erase()
+	}
 	w.drawBorder(false)
 	return w
 }
 
+func (w *LightWindow) DrawBorder() {
+	w.drawBorder(false)
+}
+
 func (w *LightWindow) DrawHBorder() {
 	w.drawBorder(true)
 }
 
 func (w *LightWindow) drawBorder(onlyHorizontal bool) {
 	switch w.border.shape {
-	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble:
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble:
 		w.drawBorderAround(onlyHorizontal)
 	case BorderHorizontal:
 		w.drawBorderHorizontal(true, true)
@@ -788,11 +842,12 @@ func (w *LightWindow) drawBorderHorizontal(top, bottom bool) {
 	if w.preview {
 		color = ColPreviewBorder
 	}
-	hw := runewidth.RuneWidth(w.border.top)
+	hw := runeWidth(w.border.top)
 	if top {
 		w.Move(0, 0)
 		w.CPrint(color, repeat(w.border.top, w.width/hw))
 	}
+
 	if bottom {
 		w.Move(w.height-1, 0)
 		w.CPrint(color, repeat(w.border.bottom, w.width/hw))
@@ -800,21 +855,20 @@ func (w *LightWindow) drawBorderHorizontal(top, bottom bool) {
 }
 
 func (w *LightWindow) drawBorderVertical(left, right bool) {
-	width := w.width - 2
-	if !left || !right {
-		width++
-	}
+	vw := runeWidth(w.border.left)
 	color := ColBorder
 	if w.preview {
 		color = ColPreviewBorder
 	}
 	for y := 0; y < w.height; y++ {
-		w.Move(y, 0)
 		if left {
+			w.Move(y, 0)
 			w.CPrint(color, string(w.border.left))
+			w.CPrint(color, " ") // Margin
 		}
-		w.CPrint(color, repeat(' ', width))
 		if right {
+			w.Move(y, w.width-vw-1)
+			w.CPrint(color, " ") // Margin
 			w.CPrint(color, string(w.border.right))
 		}
 	}
@@ -826,17 +880,20 @@ func (w *LightWindow) drawBorderAround(onlyHorizontal bool) {
 	if w.preview {
 		color = ColPreviewBorder
 	}
-	hw := runewidth.RuneWidth(w.border.top)
-	tcw := runewidth.RuneWidth(w.border.topLeft) + runewidth.RuneWidth(w.border.topRight)
-	bcw := runewidth.RuneWidth(w.border.bottomLeft) + runewidth.RuneWidth(w.border.bottomRight)
+	hw := runeWidth(w.border.top)
+	tcw := runeWidth(w.border.topLeft) + runeWidth(w.border.topRight)
+	bcw := runeWidth(w.border.bottomLeft) + runeWidth(w.border.bottomRight)
 	rem := (w.width - tcw) % hw
 	w.CPrint(color, string(w.border.topLeft)+repeat(w.border.top, (w.width-tcw)/hw)+repeat(' ', rem)+string(w.border.topRight))
 	if !onlyHorizontal {
-		vw := runewidth.RuneWidth(w.border.left)
+		vw := runeWidth(w.border.left)
 		for y := 1; y < w.height-1; y++ {
 			w.Move(y, 0)
 			w.CPrint(color, string(w.border.left))
-			w.CPrint(color, repeat(' ', w.width-vw*2))
+			w.CPrint(color, " ") // Margin
+
+			w.Move(y, w.width-vw-1)
+			w.CPrint(color, " ") // Margin
 			w.CPrint(color, string(w.border.right))
 		}
 	}
@@ -967,19 +1024,19 @@ func (w *LightWindow) Print(text string) {
 }
 
 func cleanse(str string) string {
-	return strings.Replace(str, "\x1b", "", -1)
+	return strings.ReplaceAll(str, "\x1b", "")
 }
 
 func (w *LightWindow) CPrint(pair ColorPair, text string) {
 	_, code := w.csiColor(pair.Fg(), pair.Bg(), pair.Attr())
 	w.stderrInternal(cleanse(text), false, code)
-	w.csi("m")
+	w.csi("0m")
 }
 
 func (w *LightWindow) cprint2(fg Color, bg Color, attr Attr, text string) {
 	hasColors, code := w.csiColor(fg, bg, attr)
 	if hasColors {
-		defer w.csi("m")
+		defer w.csi("0m")
 	}
 	w.stderrInternal(cleanse(text), false, code)
 }
@@ -1004,7 +1061,7 @@ func wrapLine(input string, prefixLength int, max int, tabstop int) []wrappedLin
 		} else if rs[0] == '\r' {
 			w++
 		} else {
-			w = runewidth.StringWidth(str)
+			w = uniseg.StringWidth(str)
 		}
 		width += w
 
@@ -1061,6 +1118,14 @@ func (w *LightWindow) setBg() string {
 	return "\x1b[m"
 }
 
+func (w *LightWindow) LinkBegin(uri string, params string) {
+	w.renderer.queued.WriteString("\x1b]8;" + params + ";" + uri + "\x1b\\")
+}
+
+func (w *LightWindow) LinkEnd() {
+	w.renderer.queued.WriteString("\x1b]8;;\x1b\\")
+}
+
 func (w *LightWindow) Fill(text string) FillReturn {
 	w.Move(w.posy, w.posx)
 	code := w.setBg()
@@ -1076,21 +1141,28 @@ func (w *LightWindow) CFill(fg Color, bg Color, attr Attr, text string) FillRetu
 		bg = w.bg
 	}
 	if hasColors, resetCode := w.csiColor(fg, bg, attr); hasColors {
-		defer w.csi("m")
+		defer w.csi("0m")
 		return w.fill(text, resetCode)
 	}
 	return w.fill(text, w.setBg())
 }
 
 func (w *LightWindow) FinishFill() {
-	w.MoveAndClear(w.posy, w.posx)
+	if w.posy < w.height {
+		w.MoveAndClear(w.posy, w.posx)
+	}
 	for y := w.posy + 1; y < w.height; y++ {
 		w.MoveAndClear(y, 0)
 	}
 }
 
 func (w *LightWindow) Erase() {
-	w.drawBorder(false)
-	// We don't erase the window here to avoid flickering during scroll
+	w.DrawBorder()
+	w.Move(0, 0)
+	w.FinishFill()
 	w.Move(0, 0)
 }
+
+func (w *LightWindow) EraseMaybe() bool {
+	return false
+}

src/tui/light_unix.go

@@ -3,13 +3,14 @@
 package tui
 
 import (
-	"fmt"
+	"errors"
 	"os"
 	"os/exec"
 	"strings"
 	"syscall"
 
 	"github.com/junegunn/fzf/src/util"
+	"golang.org/x/sys/unix"
 	"golang.org/x/term"
 )
 
@@ -32,34 +33,35 @@ func (r *LightRenderer) fd() int {
 	return int(r.ttyin.Fd())
 }
 
-func (r *LightRenderer) initPlatform() error {
-	fd := r.fd()
-	origState, err := term.GetState(fd)
-	if err != nil {
-		return err
-	}
-	r.origState = origState
-	term.MakeRaw(fd)
-	return nil
+func (r *LightRenderer) initPlatform() (err error) {
+	r.origState, err = term.MakeRaw(r.fd())
+	return err
 }
 
 func (r *LightRenderer) closePlatform() {
-	// NOOP
+	r.ttyout.Close()
 }
 
-func openTtyIn() *os.File {
-	in, err := os.OpenFile(consoleDevice, syscall.O_RDONLY, 0)
+func openTty(mode int) (*os.File, error) {
+	in, err := os.OpenFile(consoleDevice, mode, 0)
 	if err != nil {
 		tty := ttyname()
 		if len(tty) > 0 {
-			if in, err := os.OpenFile(tty, syscall.O_RDONLY, 0); err == nil {
-				return in
+			if in, err := os.OpenFile(tty, mode, 0); err == nil {
+				return in, nil
 			}
 		}
-		fmt.Fprintln(os.Stderr, "Failed to open "+consoleDevice)
-		os.Exit(2)
+		return nil, errors.New("failed to open " + consoleDevice)
 	}
-	return in
+	return in, nil
+}
+
+func openTtyIn() (*os.File, error) {
+	return openTty(syscall.O_RDONLY)
+}
+
+func openTtyOut() (*os.File, error) {
+	return openTty(syscall.O_WRONLY)
 }
 
 func (r *LightRenderer) setupTerminal() {
@@ -85,9 +87,14 @@ func (r *LightRenderer) updateTerminalSize() {
 func (r *LightRenderer) findOffset() (row int, col int) {
 	r.csi("6n")
 	r.flush()
+	var err error
 	bytes := []byte{}
 	for tries := 0; tries < offsetPollTries; tries++ {
-		bytes = r.getBytesInternal(bytes, tries > 0)
+		bytes, err = r.getBytesInternal(bytes, tries > 0)
+		if err != nil {
+			return -1, -1
+		}
+
 		offsets := offsetRegexp.FindSubmatch(bytes)
 		if len(offsets) > 3 {
 			// Add anything we skipped over to the input buffer
@@ -108,3 +115,11 @@ func (r *LightRenderer) getch(nonblock bool) (int, bool) {
 	}
 	return int(b[0]), true
 }
+
+func (r *LightRenderer) Size() TermSize {
+	ws, err := unix.IoctlGetWinsize(int(r.ttyin.Fd()), unix.TIOCGWINSZ)
+	if err != nil {
+		return TermSize{}
+	}
+	return TermSize{int(ws.Row), int(ws.Col), int(ws.Xpixel), int(ws.Ypixel)}
+}

src/tui/light_windows.go

@@ -72,7 +72,7 @@ func (r *LightRenderer) initPlatform() error {
 	go func() {
 		fd := int(r.inHandle)
 		b := make([]byte, 1)
-		for {
+		for !r.closed.Get() {
 			// HACK: if run from PSReadline, something resets ConsoleMode to remove ENABLE_VIRTUAL_TERMINAL_INPUT.
 			_ = windows.SetConsoleMode(windows.Handle(r.inHandle), consoleFlagsInput)
 
@@ -91,9 +91,13 @@ func (r *LightRenderer) closePlatform() {
 	windows.SetConsoleMode(windows.Handle(r.inHandle), r.origStateInput)
 }
 
-func openTtyIn() *os.File {
+func openTtyIn() (*os.File, error) {
 	// not used
-	return nil
+	return nil, nil
+}
+
+func openTtyOut() (*os.File, error) {
+	return os.Stderr, nil
 }
 
 func (r *LightRenderer) setupTerminal() error {
@@ -110,16 +114,24 @@ func (r *LightRenderer) restoreTerminal() error {
 	return windows.SetConsoleMode(windows.Handle(r.outHandle), r.origStateOutput)
 }
 
-func (r *LightRenderer) updateTerminalSize() {
+func (r *LightRenderer) Size() TermSize {
+	var w, h int
 	var bufferInfo windows.ConsoleScreenBufferInfo
 	if err := windows.GetConsoleScreenBufferInfo(windows.Handle(r.outHandle), &bufferInfo); err != nil {
-		r.width = getEnv("COLUMNS", defaultWidth)
-		r.height = r.maxHeightFunc(getEnv("LINES", defaultHeight))
+		w = getEnv("COLUMNS", defaultWidth)
+		h = r.maxHeightFunc(getEnv("LINES", defaultHeight))
 
 	} else {
-		r.width = int(bufferInfo.Window.Right - bufferInfo.Window.Left)
-		r.height = r.maxHeightFunc(int(bufferInfo.Window.Bottom - bufferInfo.Window.Top))
+		w = int(bufferInfo.Window.Right - bufferInfo.Window.Left)
+		h = r.maxHeightFunc(int(bufferInfo.Window.Bottom - bufferInfo.Window.Top))
 	}
+	return TermSize{h, w, 0, 0}
+}
+
+func (r *LightRenderer) updateTerminalSize() {
+	size := r.Size()
+	r.width = size.Columns
+	r.height = size.Lines
 }
 
 func (r *LightRenderer) findOffset() (row int, col int) {
@@ -127,7 +139,7 @@ func (r *LightRenderer) findOffset() (row int, col int) {
 	if err := windows.GetConsoleScreenBufferInfo(windows.Handle(r.outHandle), &bufferInfo); err != nil {
 		return -1, -1
 	}
-	return int(bufferInfo.CursorPosition.X), int(bufferInfo.CursorPosition.Y)
+	return int(bufferInfo.CursorPosition.Y), int(bufferInfo.CursorPosition.X)
 }
 
 func (r *LightRenderer) getch(nonblock bool) (int, bool) {

src/tui/tcell.go

@@ -4,13 +4,12 @@ package tui
 
 import (
 	"os"
+	"regexp"
 	"time"
 
 	"github.com/gdamore/tcell/v2"
-	"github.com/gdamore/tcell/v2/encoding"
 	"github.com/junegunn/fzf/src/util"
 
-	"github.com/mattn/go-runewidth"
 	"github.com/rivo/uniseg"
 )
 
@@ -51,6 +50,8 @@ type TcellWindow struct {
 	lastY       int
 	moveCursor  bool
 	borderStyle BorderStyle
+	uri         *string
+	params      *string
 }
 
 func (w *TcellWindow) Top() int {
@@ -98,6 +99,11 @@ const (
 	AttrClear     = Attr(1 << 8)
 )
 
+func (r *FullscreenRenderer) PassThrough(str string) {
+	// No-op
+	// https://github.com/gdamore/tcell/pull/650#issuecomment-1806442846
+}
+
 func (r *FullscreenRenderer) Resize(maxHeightFunc func(int) int) {}
 
 func (r *FullscreenRenderer) defaultTheme() *ColorTheme {
@@ -139,15 +145,16 @@ func (a Attr) Merge(b Attr) Attr {
 var (
 	_screen          tcell.Screen
 	_prevMouseButton tcell.ButtonMask
+	_initialResize   bool = true
 )
 
-func (r *FullscreenRenderer) initScreen() {
+func (r *FullscreenRenderer) initScreen() error {
 	s, e := tcell.NewScreen()
 	if e != nil {
-		errorExit(e.Error())
+		return e
 	}
 	if e = s.Init(); e != nil {
-		errorExit(e.Error())
+		return e
 	}
 	if r.mouse {
 		s.EnableMouse()
@@ -155,16 +162,25 @@ func (r *FullscreenRenderer) initScreen() {
 		s.DisableMouse()
 	}
 	_screen = s
+
+	return nil
 }
 
-func (r *FullscreenRenderer) Init() {
+func (r *FullscreenRenderer) Init() error {
 	if os.Getenv("TERM") == "cygwin" {
 		os.Setenv("TERM", "")
 	}
-	encoding.Register()
 
-	r.initScreen()
+	if err := r.initScreen(); err != nil {
+		return err
+	}
 	initTheme(r.theme, r.defaultTheme(), r.forceBlack)
+
+	return nil
+}
+
+func (r *FullscreenRenderer) Top() int {
+	return 0
 }
 
 func (r *FullscreenRenderer) MaxX() int {
@@ -194,14 +210,30 @@ func (r *FullscreenRenderer) NeedScrollbarRedraw() bool {
 	return true
 }
 
+func (r *FullscreenRenderer) ShouldEmitResizeEvent() bool {
+	return true
+}
+
 func (r *FullscreenRenderer) Refresh() {
 	// noop
 }
 
+// TODO: Pixel width and height not implemented
+func (r *FullscreenRenderer) Size() TermSize {
+	cols, lines := _screen.Size()
+	return TermSize{lines, cols, 0, 0}
+}
+
 func (r *FullscreenRenderer) GetChar() Event {
 	ev := _screen.PollEvent()
 	switch ev := ev.(type) {
 	case *tcell.EventResize:
+		// Ignore the first resize event
+		// https://github.com/gdamore/tcell/blob/v2.7.0/TUTORIAL.md?plain=1#L18
+		if _initialResize {
+			_initialResize = false
+			return Event{Invalid, 0, nil}
+		}
 		return Event{Resize, 0, nil}
 
 	// process mouse events:
@@ -295,16 +327,16 @@ func (r *FullscreenRenderer) GetChar() Event {
 			switch ev.Rune() {
 			case 0:
 				if ctrl {
-					return Event{BSpace, 0, nil}
+					return Event{Backspace, 0, nil}
 				}
 			case rune(tcell.KeyCtrlH):
 				switch {
 				case ctrl:
 					return keyfn('h')
 				case alt:
-					return Event{AltBS, 0, nil}
+					return Event{AltBackspace, 0, nil}
 				case none, shift:
-					return Event{BSpace, 0, nil}
+					return Event{Backspace, 0, nil}
 				}
 			}
 		case tcell.KeyCtrlI:
@@ -357,17 +389,17 @@ func (r *FullscreenRenderer) GetChar() Event {
 		// section 3: (Alt)+Backspace2
 		case tcell.KeyBackspace2:
 			if alt {
-				return Event{AltBS, 0, nil}
+				return Event{AltBackspace, 0, nil}
 			}
-			return Event{BSpace, 0, nil}
+			return Event{Backspace, 0, nil}
 
 		// section 4: (Alt+Shift)+Key(Up|Down|Left|Right)
 		case tcell.KeyUp:
 			if altShift {
-				return Event{AltSUp, 0, nil}
+				return Event{AltShiftUp, 0, nil}
 			}
 			if shift {
-				return Event{SUp, 0, nil}
+				return Event{ShiftUp, 0, nil}
 			}
 			if alt {
 				return Event{AltUp, 0, nil}
@@ -375,10 +407,10 @@ func (r *FullscreenRenderer) GetChar() Event {
 			return Event{Up, 0, nil}
 		case tcell.KeyDown:
 			if altShift {
-				return Event{AltSDown, 0, nil}
+				return Event{AltShiftDown, 0, nil}
 			}
 			if shift {
-				return Event{SDown, 0, nil}
+				return Event{ShiftDown, 0, nil}
 			}
 			if alt {
 				return Event{AltDown, 0, nil}
@@ -386,10 +418,10 @@ func (r *FullscreenRenderer) GetChar() Event {
 			return Event{Down, 0, nil}
 		case tcell.KeyLeft:
 			if altShift {
-				return Event{AltSLeft, 0, nil}
+				return Event{AltShiftLeft, 0, nil}
 			}
 			if shift {
-				return Event{SLeft, 0, nil}
+				return Event{ShiftLeft, 0, nil}
 			}
 			if alt {
 				return Event{AltLeft, 0, nil}
@@ -397,10 +429,10 @@ func (r *FullscreenRenderer) GetChar() Event {
 			return Event{Left, 0, nil}
 		case tcell.KeyRight:
 			if altShift {
-				return Event{AltSRight, 0, nil}
+				return Event{AltShiftRight, 0, nil}
 			}
 			if shift {
-				return Event{SRight, 0, nil}
+				return Event{ShiftRight, 0, nil}
 			}
 			if alt {
 				return Event{AltRight, 0, nil}
@@ -417,17 +449,17 @@ func (r *FullscreenRenderer) GetChar() Event {
 				return Event{CtrlDelete, 0, nil}
 			}
 			if shift {
-				return Event{SDelete, 0, nil}
+				return Event{ShiftDelete, 0, nil}
 			}
-			return Event{Del, 0, nil}
+			return Event{Delete, 0, nil}
 		case tcell.KeyEnd:
 			return Event{End, 0, nil}
 		case tcell.KeyPgUp:
-			return Event{PgUp, 0, nil}
+			return Event{PageUp, 0, nil}
 		case tcell.KeyPgDn:
-			return Event{PgDn, 0, nil}
+			return Event{PageDown, 0, nil}
 		case tcell.KeyBacktab:
-			return Event{BTab, 0, nil}
+			return Event{ShiftTab, 0, nil}
 		case tcell.KeyF1:
 			return Event{F1, 0, nil}
 		case tcell.KeyF2:
@@ -473,7 +505,7 @@ func (r *FullscreenRenderer) GetChar() Event {
 
 		// section 7: Esc
 		case tcell.KeyEsc:
-			return Event{ESC, 0, nil}
+			return Event{Esc, 0, nil}
 		}
 	}
 
@@ -519,7 +551,7 @@ func (r *FullscreenRenderer) NewWindow(top int, left int, width int, height int,
 		height:      height,
 		normal:      normal,
 		borderStyle: borderStyle}
-	w.drawBorder(false)
+	w.Erase()
 	return w
 }
 
@@ -536,7 +568,17 @@ func fill(x, y, w, h int, n ColorPair, r rune) {
 }
 
 func (w *TcellWindow) Erase() {
-	fill(w.left-1, w.top, w.width+1, w.height-1, w.normal, ' ')
+	if w.borderStyle.shape.HasLeft() {
+		fill(w.left-1, w.top, w.width, w.height-1, w.normal, ' ')
+	} else {
+		fill(w.left, w.top, w.width-1, w.height-1, w.normal, ' ')
+	}
+	w.drawBorder(false)
+}
+
+func (w *TcellWindow) EraseMaybe() bool {
+	w.Erase()
+	return true
 }
 
 func (w *TcellWindow) Enclose(y int, x int) bool {
@@ -562,6 +604,16 @@ func (w *TcellWindow) Print(text string) {
 	w.printString(text, w.normal)
 }
 
+func (w *TcellWindow) withUrl(style tcell.Style) tcell.Style {
+	if w.uri != nil {
+		style = style.Url(*w.uri)
+		if md := regexp.MustCompile(`id=([^:]+)`).FindStringSubmatch(*w.params); len(md) > 1 {
+			style = style.UrlId(md[1])
+		}
+	}
+	return style
+}
+
 func (w *TcellWindow) printString(text string, pair ColorPair) {
 	lx := 0
 	a := pair.Attr()
@@ -576,6 +628,7 @@ func (w *TcellWindow) printString(text string, pair ColorPair) {
 			Blink(a&Attr(tcell.AttrBlink) != 0).
 			Dim(a&Attr(tcell.AttrDim) != 0)
 	}
+	style = w.withUrl(style)
 
 	gr := uniseg.NewGraphemes(text)
 	for gr.Next() {
@@ -626,6 +679,7 @@ func (w *TcellWindow) fillString(text string, pair ColorPair) FillReturn {
 		Underline(a&Attr(tcell.AttrUnderline) != 0).
 		StrikeThrough(a&Attr(tcell.AttrStrikeThrough) != 0).
 		Italic(a&Attr(tcell.AttrItalic) != 0)
+	style = w.withUrl(style)
 
 	gr := uniseg.NewGraphemes(text)
 Loop:
@@ -677,6 +731,16 @@ func (w *TcellWindow) Fill(str string) FillReturn {
 	return w.fillString(str, w.normal)
 }
 
+func (w *TcellWindow) LinkBegin(uri string, params string) {
+	w.uri = &uri
+	w.params = &params
+}
+
+func (w *TcellWindow) LinkEnd() {
+	w.uri = nil
+	w.params = nil
+}
+
 func (w *TcellWindow) CFill(fg Color, bg Color, a Attr, str string) FillReturn {
 	if fg == colDefault {
 		fg = w.normal.Fg()
@@ -687,6 +751,10 @@ func (w *TcellWindow) CFill(fg Color, bg Color, a Attr, str string) FillReturn {
 	return w.fillString(str, NewColorPair(fg, bg, a))
 }
 
+func (w *TcellWindow) DrawBorder() {
+	w.drawBorder(false)
+}
+
 func (w *TcellWindow) DrawHBorder() {
 	w.drawBorder(true)
 }
@@ -713,9 +781,9 @@ func (w *TcellWindow) drawBorder(onlyHorizontal bool) {
 		style = w.normal.style()
 	}
 
-	hw := runewidth.RuneWidth(w.borderStyle.top)
+	hw := runeWidth(w.borderStyle.top)
 	switch shape {
-	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble, BorderHorizontal, BorderTop:
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble, BorderHorizontal, BorderTop:
 		max := right - 2*hw
 		if shape == BorderHorizontal || shape == BorderTop {
 			max = right - hw
@@ -730,7 +798,7 @@ func (w *TcellWindow) drawBorder(onlyHorizontal bool) {
 		}
 	}
 	switch shape {
-	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble, BorderHorizontal, BorderBottom:
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble, BorderHorizontal, BorderBottom:
 		max := right - 2*hw
 		if shape == BorderHorizontal || shape == BorderBottom {
 			max = right - hw
@@ -741,24 +809,24 @@ func (w *TcellWindow) drawBorder(onlyHorizontal bool) {
 	}
 	if !onlyHorizontal {
 		switch shape {
-		case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble, BorderVertical, BorderLeft:
+		case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble, BorderVertical, BorderLeft:
 			for y := top; y < bot; y++ {
 				_screen.SetContent(left, y, w.borderStyle.left, nil, style)
 			}
 		}
 		switch shape {
-		case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble, BorderVertical, BorderRight:
-			vw := runewidth.RuneWidth(w.borderStyle.right)
+		case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble, BorderVertical, BorderRight:
+			vw := runeWidth(w.borderStyle.right)
 			for y := top; y < bot; y++ {
 				_screen.SetContent(right-vw, y, w.borderStyle.right, nil, style)
 			}
 		}
 	}
 	switch shape {
-	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble:
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble:
 		_screen.SetContent(left, top, w.borderStyle.topLeft, nil, style)
-		_screen.SetContent(right-runewidth.RuneWidth(w.borderStyle.topRight), top, w.borderStyle.topRight, nil, style)
+		_screen.SetContent(right-runeWidth(w.borderStyle.topRight), top, w.borderStyle.topRight, nil, style)
 		_screen.SetContent(left, bot-1, w.borderStyle.bottomLeft, nil, style)
-		_screen.SetContent(right-runewidth.RuneWidth(w.borderStyle.bottomRight), bot-1, w.borderStyle.bottomRight, nil, style)
+		_screen.SetContent(right-runeWidth(w.borderStyle.bottomRight), bot-1, w.borderStyle.bottomRight, nil, style)
 	}
 }

src/tui/tcell_test.go

@@ -3,6 +3,7 @@
 package tui
 
 import (
+	"os"
 	"testing"
 
 	"github.com/gdamore/tcell/v2"
@@ -20,7 +21,7 @@ func assert(t *testing.T, context string, got interface{}, want interface{}) boo
 
 // Test the handling of the tcell keyboard events.
 func TestGetCharEventKey(t *testing.T) {
-	if util.ToTty() {
+	if util.IsTty(os.Stdout) {
 		// This test is skipped when output goes to terminal, because it causes
 		// some glitches:
 		// - output lines may not start at the beginning of a row which makes
@@ -102,22 +103,22 @@ func TestGetCharEventKey(t *testing.T) {
 		// KeyBackspace2 is alias for KeyDEL = 0x7F (ASCII) (allegedly unused by Windows)
 		// KeyDelete = 0x2E (VK_DELETE constant in Windows)
 		// KeyBackspace is alias for KeyBS = 0x08 (ASCII) (implicit alias with KeyCtrlH)
-		{giveKey{tcell.KeyBackspace2, 0, tcell.ModNone}, wantKey{BSpace, 0, nil}}, // fabricated
-		{giveKey{tcell.KeyBackspace2, 0, tcell.ModAlt}, wantKey{AltBS, 0, nil}},   // fabricated
-		{giveKey{tcell.KeyDEL, 0, tcell.ModNone}, wantKey{BSpace, 0, nil}},        // fabricated, unhandled
-		{giveKey{tcell.KeyDelete, 0, tcell.ModNone}, wantKey{Del, 0, nil}},
-		{giveKey{tcell.KeyDelete, 0, tcell.ModAlt}, wantKey{Del, 0, nil}},
+		{giveKey{tcell.KeyBackspace2, 0, tcell.ModNone}, wantKey{Backspace, 0, nil}},   // fabricated
+		{giveKey{tcell.KeyBackspace2, 0, tcell.ModAlt}, wantKey{AltBackspace, 0, nil}}, // fabricated
+		{giveKey{tcell.KeyDEL, 0, tcell.ModNone}, wantKey{Backspace, 0, nil}},          // fabricated, unhandled
+		{giveKey{tcell.KeyDelete, 0, tcell.ModNone}, wantKey{Delete, 0, nil}},
+		{giveKey{tcell.KeyDelete, 0, tcell.ModAlt}, wantKey{Delete, 0, nil}},
 		{giveKey{tcell.KeyBackspace, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},                                                  // fabricated, unhandled
 		{giveKey{tcell.KeyBS, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},                                                         // fabricated, unhandled
 		{giveKey{tcell.KeyCtrlH, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},                                                      // fabricated, unhandled
-		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModNone}, wantKey{BSpace, 0, nil}},                                    // actual "Backspace" keystroke
-		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModAlt}, wantKey{AltBS, 0, nil}},                                      // actual "Alt+Backspace" keystroke
-		{giveKey{tcell.KeyDEL, rune(tcell.KeyDEL), tcell.ModCtrl}, wantKey{BSpace, 0, nil}},                                        // actual "Ctrl+Backspace" keystroke
-		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModShift}, wantKey{BSpace, 0, nil}},                                   // actual "Shift+Backspace" keystroke
-		{giveKey{tcell.KeyCtrlH, 0, tcell.ModCtrl | tcell.ModAlt}, wantKey{BSpace, 0, nil}},                                        // actual "Ctrl+Alt+Backspace" keystroke
-		{giveKey{tcell.KeyCtrlH, 0, tcell.ModCtrl | tcell.ModShift}, wantKey{BSpace, 0, nil}},                                      // actual "Ctrl+Shift+Backspace" keystroke
-		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModShift | tcell.ModAlt}, wantKey{AltBS, 0, nil}},                     // actual "Shift+Alt+Backspace" keystroke
-		{giveKey{tcell.KeyCtrlH, 0, tcell.ModCtrl | tcell.ModAlt | tcell.ModShift}, wantKey{BSpace, 0, nil}},                       // actual "Ctrl+Shift+Alt+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModNone}, wantKey{Backspace, 0, nil}},                                 // actual "Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModAlt}, wantKey{AltBackspace, 0, nil}},                               // actual "Alt+Backspace" keystroke
+		{giveKey{tcell.KeyDEL, rune(tcell.KeyDEL), tcell.ModCtrl}, wantKey{Backspace, 0, nil}},                                     // actual "Ctrl+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModShift}, wantKey{Backspace, 0, nil}},                                // actual "Shift+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, 0, tcell.ModCtrl | tcell.ModAlt}, wantKey{Backspace, 0, nil}},                                     // actual "Ctrl+Alt+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, 0, tcell.ModCtrl | tcell.ModShift}, wantKey{Backspace, 0, nil}},                                   // actual "Ctrl+Shift+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModShift | tcell.ModAlt}, wantKey{AltBackspace, 0, nil}},              // actual "Shift+Alt+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, 0, tcell.ModCtrl | tcell.ModAlt | tcell.ModShift}, wantKey{Backspace, 0, nil}},                    // actual "Ctrl+Shift+Alt+Backspace" keystroke
 		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModCtrl}, wantKey{CtrlH, 0, nil}},                                     // actual "Ctrl+H" keystroke
 		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModCtrl | tcell.ModAlt}, wantKey{CtrlAlt, 'h', nil}},                  // fabricated "Ctrl+Alt+H" keystroke
 		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModCtrl | tcell.ModShift}, wantKey{CtrlH, 0, nil}},                    // actual "Ctrl+Shift+H" keystroke
@@ -126,8 +127,8 @@ func TestGetCharEventKey(t *testing.T) {
 		// section 4: (Alt+Shift)+Key(Up|Down|Left|Right)
 		{giveKey{tcell.KeyUp, 0, tcell.ModNone}, wantKey{Up, 0, nil}},
 		{giveKey{tcell.KeyDown, 0, tcell.ModAlt}, wantKey{AltDown, 0, nil}},
-		{giveKey{tcell.KeyLeft, 0, tcell.ModShift}, wantKey{SLeft, 0, nil}},
-		{giveKey{tcell.KeyRight, 0, tcell.ModShift | tcell.ModAlt}, wantKey{AltSRight, 0, nil}},
+		{giveKey{tcell.KeyLeft, 0, tcell.ModShift}, wantKey{ShiftLeft, 0, nil}},
+		{giveKey{tcell.KeyRight, 0, tcell.ModShift | tcell.ModAlt}, wantKey{AltShiftRight, 0, nil}},
 		{giveKey{tcell.KeyUpLeft, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},    // fabricated, unhandled
 		{giveKey{tcell.KeyUpRight, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},   // fabricated, unhandled
 		{giveKey{tcell.KeyDownLeft, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},  // fabricated, unhandled
@@ -161,11 +162,11 @@ func TestGetCharEventKey(t *testing.T) {
 
 		// section 7: Esc
 		// KeyEsc and KeyEscape are aliases for KeyESC
-		{giveKey{tcell.KeyEsc, rune(tcell.KeyEsc), tcell.ModNone}, wantKey{ESC, 0, nil}},               // fabricated
-		{giveKey{tcell.KeyESC, rune(tcell.KeyESC), tcell.ModNone}, wantKey{ESC, 0, nil}},               // unhandled
-		{giveKey{tcell.KeyEscape, rune(tcell.KeyEscape), tcell.ModNone}, wantKey{ESC, 0, nil}},         // fabricated, unhandled
-		{giveKey{tcell.KeyESC, rune(tcell.KeyESC), tcell.ModCtrl}, wantKey{ESC, 0, nil}},               // actual Ctrl+[ keystroke
-		{giveKey{tcell.KeyCtrlLeftSq, rune(tcell.KeyCtrlLeftSq), tcell.ModCtrl}, wantKey{ESC, 0, nil}}, // fabricated, unhandled
+		{giveKey{tcell.KeyEsc, rune(tcell.KeyEsc), tcell.ModNone}, wantKey{Esc, 0, nil}},               // fabricated
+		{giveKey{tcell.KeyESC, rune(tcell.KeyESC), tcell.ModNone}, wantKey{Esc, 0, nil}},               // unhandled
+		{giveKey{tcell.KeyEscape, rune(tcell.KeyEscape), tcell.ModNone}, wantKey{Esc, 0, nil}},         // fabricated, unhandled
+		{giveKey{tcell.KeyESC, rune(tcell.KeyESC), tcell.ModCtrl}, wantKey{Esc, 0, nil}},               // actual Ctrl+[ keystroke
+		{giveKey{tcell.KeyCtrlLeftSq, rune(tcell.KeyCtrlLeftSq), tcell.ModCtrl}, wantKey{Esc, 0, nil}}, // fabricated, unhandled
 
 		// section 8: Invalid
 		{giveKey{tcell.KeyRune, 'a', tcell.ModMeta}, wantKey{Rune, 'a', nil}}, // fabricated
@@ -182,6 +183,7 @@ func TestGetCharEventKey(t *testing.T) {
 	r.Init()
 
 	// run and evaluate the tests
+	initialResizeAsInvalid := true
 	for _, test := range tests {
 		// generate key event
 		giveEvent := tcell.NewEventKey(test.giveKey.Type, test.giveKey.Char, test.giveKey.Mods)
@@ -191,8 +193,9 @@ func TestGetCharEventKey(t *testing.T) {
 		// process the event in fzf and evaluate the test
 		gotEvent := r.GetChar()
 		// skip Resize events, those are sometimes put in the buffer outside of this test
-		for gotEvent.Type == Resize {
-			t.Logf("Resize swallowed")
+		if initialResizeAsInvalid && gotEvent.Type == Invalid {
+			t.Logf("Resize as Invalid swallowed")
+			initialResizeAsInvalid = false
 			gotEvent = r.GetChar()
 		}
 		t.Logf("wantEvent = %T{Type: %v, Char: %q (%[3]v)}\n", test.wantKey, test.wantKey.Type, test.wantKey.Char)
@@ -257,7 +260,7 @@ Quick reference
 37					LeftClick
 38					RightClick
 39					BTab
-40					BSpace
+40					Backspace
 41					Del
 42					PgUp
 43					PgDn
@@ -270,7 +273,7 @@ Quick reference
 50					Insert
 51					SUp
 52					SDown
-53					SLeft
+53					ShiftLeft
 54					SRight
 55					F1
 56					F2
@@ -286,15 +289,15 @@ Quick reference
 66					F12
 67					Change
 68					BackwardEOF
-69					AltBS
+69					AltBackspace
 70					AltUp
 71					AltDown
 72					AltLeft
 73					AltRight
 74					AltSUp
 75					AltSDown
-76					AltSLeft
-77					AltSRight
+76					AltShiftLeft
+77					AltShiftRight
 78					Alt
 79					CtrlAlt
 ..

src/tui/ttyname_unix.go

@@ -3,45 +3,52 @@
 package tui
 
 import (
-	"io/ioutil"
 	"os"
+	"sync/atomic"
 	"syscall"
 )
 
 var devPrefixes = [...]string{"/dev/pts/", "/dev/"}
 
+var tty atomic.Value
+
 func ttyname() string {
+	if cached := tty.Load(); cached != nil {
+		return cached.(string)
+	}
+
 	var stderr syscall.Stat_t
 	if syscall.Fstat(2, &stderr) != nil {
 		return ""
 	}
 
 	for _, prefix := range devPrefixes {
-		files, err := ioutil.ReadDir(prefix)
+		files, err := os.ReadDir(prefix)
 		if err != nil {
 			continue
 		}
 
 		for _, file := range files {
-			if stat, ok := file.Sys().(*syscall.Stat_t); ok && stat.Rdev == stderr.Rdev {
-				return prefix + file.Name()
+			info, err := file.Info()
+			if err != nil {
+				continue
+			}
+			if stat, ok := info.Sys().(*syscall.Stat_t); ok && stat.Rdev == stderr.Rdev {
+				value := prefix + file.Name()
+				tty.Store(value)
+				return value
 			}
 		}
 	}
 	return ""
 }
 
-// TtyIn returns terminal device to be used as STDIN, falls back to os.Stdin
-func TtyIn() *os.File {
-	in, err := os.OpenFile(consoleDevice, syscall.O_RDONLY, 0)
-	if err != nil {
-		tty := ttyname()
-		if len(tty) > 0 {
-			if in, err := os.OpenFile(tty, syscall.O_RDONLY, 0); err == nil {
-				return in
-			}
-		}
-		return os.Stdin
-	}
-	return in
+// TtyIn returns terminal device to read user input
+func TtyIn() (*os.File, error) {
+	return openTtyIn()
+}
+
+// TtyIn returns terminal device to write to
+func TtyOut() (*os.File, error) {
+	return openTtyOut()
 }

src/tui/ttyname_windows.go

@@ -2,13 +2,20 @@
 
 package tui
 
-import "os"
+import (
+	"os"
+)
 
 func ttyname() string {
 	return ""
 }
 
 // TtyIn on Windows returns os.Stdin
-func TtyIn() *os.File {
-	return os.Stdin
+func TtyIn() (*os.File, error) {
+	return os.Stdin, nil
+}
+
+// TtyIn on Windows returns nil
+func TtyOut() (*os.File, error) {
+	return nil, nil
 }

src/tui/tui.go

@@ -1,13 +1,16 @@
 package tui
 
 import (
-	"fmt"
-	"os"
 	"strconv"
 	"time"
+
+	"github.com/junegunn/fzf/src/util"
+	"github.com/rivo/uniseg"
 )
 
 // Types of user action
+//
+//go:generate stringer -type=EventType
 type EventType int
 
 const (
@@ -39,7 +42,7 @@ const (
 	CtrlX
 	CtrlY
 	CtrlZ
-	ESC
+	Esc
 	CtrlSpace
 	CtrlDelete
 
@@ -49,19 +52,12 @@ const (
 	CtrlCaret
 	CtrlSlash
 
-	Invalid
-	Resize
-	Mouse
-	DoubleClick
-	LeftClick
-	RightClick
+	ShiftTab
+	Backspace
 
-	BTab
-	BSpace
-
-	Del
-	PgUp
-	PgDn
+	Delete
+	PageUp
+	PageDown
 
 	Up
 	Down
@@ -71,11 +67,11 @@ const (
 	End
 	Insert
 
-	SUp
-	SDown
-	SLeft
-	SRight
-	SDelete
+	ShiftUp
+	ShiftDown
+	ShiftLeft
+	ShiftRight
+	ShiftDelete
 
 	F1
 	F2
@@ -90,6 +86,39 @@ const (
 	F11
 	F12
 
+	AltBackspace
+
+	AltUp
+	AltDown
+	AltLeft
+	AltRight
+
+	AltShiftUp
+	AltShiftDown
+	AltShiftLeft
+	AltShiftRight
+
+	Alt
+	CtrlAlt
+
+	Invalid
+	Fatal
+
+	Mouse
+	DoubleClick
+	LeftClick
+	RightClick
+	SLeftClick
+	SRightClick
+	ScrollUp
+	ScrollDown
+	SScrollUp
+	SScrollDown
+	PreviewScrollUp
+	PreviewScrollDown
+
+	// Events
+	Resize
 	Change
 	BackwardEOF
 	Start
@@ -97,21 +126,10 @@ const (
 	Focus
 	One
 	Zero
-
-	AltBS
-
-	AltUp
-	AltDown
-	AltLeft
-	AltRight
-
-	AltSUp
-	AltSDown
-	AltSLeft
-	AltSRight
-
-	Alt
-	CtrlAlt
+	Result
+	Jump
+	JumpCancel
+	ClickHeader
 )
 
 func (t EventType) AsEvent() Event {
@@ -131,6 +149,31 @@ func (e Event) Comparable() Event {
 	return Event{e.Type, e.Char, nil}
 }
 
+func (e Event) KeyName() string {
+	if e.Type >= Invalid {
+		return ""
+	}
+
+	switch e.Type {
+	case Rune:
+		return string(e.Char)
+	case Alt:
+		return "alt-" + string(e.Char)
+	case CtrlAlt:
+		return "ctrl-alt-" + string(e.Char)
+	case CtrlBackSlash:
+		return "ctrl-\\"
+	case CtrlRightBracket:
+		return "ctrl-]"
+	case CtrlCaret:
+		return "ctrl-^"
+	case CtrlSlash:
+		return "ctrl-/"
+	}
+
+	return util.ToKebabCase(e.Type.String())
+}
+
 func Key(r rune) Event {
 	return Event{Rune, r, nil}
 }
@@ -260,6 +303,9 @@ type ColorTheme struct {
 	Disabled         ColorAttr
 	Fg               ColorAttr
 	Bg               ColorAttr
+	SelectedFg       ColorAttr
+	SelectedBg       ColorAttr
+	SelectedMatch    ColorAttr
 	PreviewFg        ColorAttr
 	PreviewBg        ColorAttr
 	DarkBg           ColorAttr
@@ -271,7 +317,7 @@ type ColorTheme struct {
 	Spinner          ColorAttr
 	Info             ColorAttr
 	Cursor           ColorAttr
-	Selected         ColorAttr
+	Marker           ColorAttr
 	Header           ColorAttr
 	Separator        ColorAttr
 	Scrollbar        ColorAttr
@@ -288,15 +334,6 @@ type Event struct {
 	MouseEvent *MouseEvent
 }
 
-func (e Event) Is(types ...EventType) bool {
-	for _, t := range types {
-		if e.Type == t {
-			return true
-		}
-	}
-	return false
-}
-
 type MouseEvent struct {
 	Y      int
 	X      int
@@ -310,11 +347,13 @@ type MouseEvent struct {
 type BorderShape int
 
 const (
-	BorderNone BorderShape = iota
+	BorderUndefined BorderShape = iota
+	BorderNone
 	BorderRounded
 	BorderSharp
 	BorderBold
 	BorderBlock
+	BorderThinBlock
 	BorderDouble
 	BorderHorizontal
 	BorderVertical
@@ -324,6 +363,14 @@ const (
 	BorderRight
 )
 
+func (s BorderShape) HasLeft() bool {
+	switch s {
+	case BorderNone, BorderRight, BorderTop, BorderBottom, BorderHorizontal: // No Left
+		return false
+	}
+	return true
+}
+
 func (s BorderShape) HasRight() bool {
 	switch s {
 	case BorderNone, BorderLeft, BorderTop, BorderBottom, BorderHorizontal: // No right
@@ -408,6 +455,23 @@ func MakeBorderStyle(shape BorderShape, unicode bool) BorderStyle {
 			bottomLeft:  '▙',
 			bottomRight: '▟',
 		}
+
+	case BorderThinBlock:
+		// 🭽▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔🭾
+		// ▏                  ▕
+		// 🭼▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁🭿
+		return BorderStyle{
+			shape:       shape,
+			top:         '▔',
+			bottom:      '▁',
+			left:        '▏',
+			right:       '▕',
+			topLeft:     '🭽',
+			topRight:    '🭾',
+			bottomLeft:  '🭼',
+			bottomRight: '🭿',
+		}
+
 	case BorderDouble:
 		return BorderStyle{
 			shape:       shape,
@@ -447,8 +511,15 @@ func MakeTransparentBorder() BorderStyle {
 		bottomRight: ' '}
 }
 
+type TermSize struct {
+	Lines    int
+	Columns  int
+	PxWidth  int
+	PxHeight int
+}
+
 type Renderer interface {
-	Init()
+	Init() error
 	Resize(maxHeightFunc func(int) int)
 	Pause(clear bool)
 	Resume(clear bool, sigcont bool)
@@ -456,13 +527,18 @@ type Renderer interface {
 	RefreshWindows(windows []Window)
 	Refresh()
 	Close()
+	PassThrough(string)
 	NeedScrollbarRedraw() bool
+	ShouldEmitResizeEvent() bool
 
 	GetChar() Event
 
+	Top() int
 	MaxX() int
 	MaxY() int
 
+	Size() TermSize
+
 	NewWindow(top int, left int, width int, height int, preview bool, borderStyle BorderStyle) Window
 }
 
@@ -472,6 +548,7 @@ type Window interface {
 	Width() int
 	Height() int
 
+	DrawBorder()
 	DrawHBorder()
 	Refresh()
 	FinishFill()
@@ -487,7 +564,10 @@ type Window interface {
 	CPrint(color ColorPair, text string)
 	Fill(text string) FillReturn
 	CFill(fg Color, bg Color, attr Attr, text string) FillReturn
+	LinkBegin(uri string, params string)
+	LinkEnd()
 	Erase()
+	EraseMaybe() bool
 }
 
 type FullscreenRenderer struct {
@@ -520,12 +600,14 @@ var (
 	ColMatch                ColorPair
 	ColCursor               ColorPair
 	ColCursorEmpty          ColorPair
+	ColMarker               ColorPair
 	ColSelected             ColorPair
+	ColSelectedMatch        ColorPair
 	ColCurrent              ColorPair
 	ColCurrentMatch         ColorPair
 	ColCurrentCursor        ColorPair
 	ColCurrentCursorEmpty   ColorPair
-	ColCurrentSelected      ColorPair
+	ColCurrentMarker        ColorPair
 	ColCurrentSelectedEmpty ColorPair
 	ColSpinner              ColorPair
 	ColInfo                 ColorPair
@@ -538,6 +620,7 @@ var (
 	ColBorderLabel          ColorPair
 	ColPreviewLabel         ColorPair
 	ColPreviewScrollbar     ColorPair
+	ColPreviewSpinner       ColorPair
 )
 
 func EmptyTheme() *ColorTheme {
@@ -546,6 +629,9 @@ func EmptyTheme() *ColorTheme {
 		Input:            ColorAttr{colUndefined, AttrUndefined},
 		Fg:               ColorAttr{colUndefined, AttrUndefined},
 		Bg:               ColorAttr{colUndefined, AttrUndefined},
+		SelectedFg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedBg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedMatch:    ColorAttr{colUndefined, AttrUndefined},
 		DarkBg:           ColorAttr{colUndefined, AttrUndefined},
 		Prompt:           ColorAttr{colUndefined, AttrUndefined},
 		Match:            ColorAttr{colUndefined, AttrUndefined},
@@ -554,7 +640,7 @@ func EmptyTheme() *ColorTheme {
 		Spinner:          ColorAttr{colUndefined, AttrUndefined},
 		Info:             ColorAttr{colUndefined, AttrUndefined},
 		Cursor:           ColorAttr{colUndefined, AttrUndefined},
-		Selected:         ColorAttr{colUndefined, AttrUndefined},
+		Marker:           ColorAttr{colUndefined, AttrUndefined},
 		Header:           ColorAttr{colUndefined, AttrUndefined},
 		Border:           ColorAttr{colUndefined, AttrUndefined},
 		BorderLabel:      ColorAttr{colUndefined, AttrUndefined},
@@ -576,6 +662,9 @@ func NoColorTheme() *ColorTheme {
 		Input:            ColorAttr{colDefault, AttrUndefined},
 		Fg:               ColorAttr{colDefault, AttrUndefined},
 		Bg:               ColorAttr{colDefault, AttrUndefined},
+		SelectedFg:       ColorAttr{colDefault, AttrUndefined},
+		SelectedBg:       ColorAttr{colDefault, AttrUndefined},
+		SelectedMatch:    ColorAttr{colDefault, AttrUndefined},
 		DarkBg:           ColorAttr{colDefault, AttrUndefined},
 		Prompt:           ColorAttr{colDefault, AttrUndefined},
 		Match:            ColorAttr{colDefault, Underline},
@@ -584,7 +673,7 @@ func NoColorTheme() *ColorTheme {
 		Spinner:          ColorAttr{colDefault, AttrUndefined},
 		Info:             ColorAttr{colDefault, AttrUndefined},
 		Cursor:           ColorAttr{colDefault, AttrUndefined},
-		Selected:         ColorAttr{colDefault, AttrUndefined},
+		Marker:           ColorAttr{colDefault, AttrUndefined},
 		Header:           ColorAttr{colDefault, AttrUndefined},
 		Border:           ColorAttr{colDefault, AttrUndefined},
 		BorderLabel:      ColorAttr{colDefault, AttrUndefined},
@@ -600,17 +689,15 @@ func NoColorTheme() *ColorTheme {
 	}
 }
 
-func errorExit(message string) {
-	fmt.Fprintln(os.Stderr, message)
-	os.Exit(2)
-}
-
 func init() {
 	Default16 = &ColorTheme{
 		Colored:          true,
 		Input:            ColorAttr{colDefault, AttrUndefined},
 		Fg:               ColorAttr{colDefault, AttrUndefined},
 		Bg:               ColorAttr{colDefault, AttrUndefined},
+		SelectedFg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedBg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedMatch:    ColorAttr{colUndefined, AttrUndefined},
 		DarkBg:           ColorAttr{colBlack, AttrUndefined},
 		Prompt:           ColorAttr{colBlue, AttrUndefined},
 		Match:            ColorAttr{colGreen, AttrUndefined},
@@ -619,7 +706,7 @@ func init() {
 		Spinner:          ColorAttr{colGreen, AttrUndefined},
 		Info:             ColorAttr{colWhite, AttrUndefined},
 		Cursor:           ColorAttr{colRed, AttrUndefined},
-		Selected:         ColorAttr{colMagenta, AttrUndefined},
+		Marker:           ColorAttr{colMagenta, AttrUndefined},
 		Header:           ColorAttr{colCyan, AttrUndefined},
 		Border:           ColorAttr{colBlack, AttrUndefined},
 		BorderLabel:      ColorAttr{colWhite, AttrUndefined},
@@ -638,6 +725,9 @@ func init() {
 		Input:            ColorAttr{colDefault, AttrUndefined},
 		Fg:               ColorAttr{colDefault, AttrUndefined},
 		Bg:               ColorAttr{colDefault, AttrUndefined},
+		SelectedFg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedBg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedMatch:    ColorAttr{colUndefined, AttrUndefined},
 		DarkBg:           ColorAttr{236, AttrUndefined},
 		Prompt:           ColorAttr{110, AttrUndefined},
 		Match:            ColorAttr{108, AttrUndefined},
@@ -646,7 +736,7 @@ func init() {
 		Spinner:          ColorAttr{148, AttrUndefined},
 		Info:             ColorAttr{144, AttrUndefined},
 		Cursor:           ColorAttr{161, AttrUndefined},
-		Selected:         ColorAttr{168, AttrUndefined},
+		Marker:           ColorAttr{168, AttrUndefined},
 		Header:           ColorAttr{109, AttrUndefined},
 		Border:           ColorAttr{59, AttrUndefined},
 		BorderLabel:      ColorAttr{145, AttrUndefined},
@@ -665,6 +755,9 @@ func init() {
 		Input:            ColorAttr{colDefault, AttrUndefined},
 		Fg:               ColorAttr{colDefault, AttrUndefined},
 		Bg:               ColorAttr{colDefault, AttrUndefined},
+		SelectedFg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedBg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedMatch:    ColorAttr{colUndefined, AttrUndefined},
 		DarkBg:           ColorAttr{251, AttrUndefined},
 		Prompt:           ColorAttr{25, AttrUndefined},
 		Match:            ColorAttr{66, AttrUndefined},
@@ -673,7 +766,7 @@ func init() {
 		Spinner:          ColorAttr{65, AttrUndefined},
 		Info:             ColorAttr{101, AttrUndefined},
 		Cursor:           ColorAttr{161, AttrUndefined},
-		Selected:         ColorAttr{168, AttrUndefined},
+		Marker:           ColorAttr{168, AttrUndefined},
 		Header:           ColorAttr{31, AttrUndefined},
 		Border:           ColorAttr{145, AttrUndefined},
 		BorderLabel:      ColorAttr{59, AttrUndefined},
@@ -715,12 +808,15 @@ func initTheme(theme *ColorTheme, baseTheme *ColorTheme, forceBlack bool) {
 	theme.Spinner = o(baseTheme.Spinner, theme.Spinner)
 	theme.Info = o(baseTheme.Info, theme.Info)
 	theme.Cursor = o(baseTheme.Cursor, theme.Cursor)
-	theme.Selected = o(baseTheme.Selected, theme.Selected)
+	theme.Marker = o(baseTheme.Marker, theme.Marker)
 	theme.Header = o(baseTheme.Header, theme.Header)
 	theme.Border = o(baseTheme.Border, theme.Border)
 	theme.BorderLabel = o(baseTheme.BorderLabel, theme.BorderLabel)
 
 	// These colors are not defined in the base themes
+	theme.SelectedFg = o(theme.Fg, theme.SelectedFg)
+	theme.SelectedBg = o(theme.Bg, theme.SelectedBg)
+	theme.SelectedMatch = o(theme.Match, theme.SelectedMatch)
 	theme.Disabled = o(theme.Input, theme.Disabled)
 	theme.Gutter = o(theme.DarkBg, theme.Gutter)
 	theme.PreviewFg = o(theme.Fg, theme.PreviewFg)
@@ -746,17 +842,23 @@ func initPalette(theme *ColorTheme) {
 
 	ColPrompt = pair(theme.Prompt, theme.Bg)
 	ColNormal = pair(theme.Fg, theme.Bg)
+	ColSelected = pair(theme.SelectedFg, theme.SelectedBg)
 	ColInput = pair(theme.Input, theme.Bg)
 	ColDisabled = pair(theme.Disabled, theme.Bg)
 	ColMatch = pair(theme.Match, theme.Bg)
+	ColSelectedMatch = pair(theme.SelectedMatch, theme.SelectedBg)
 	ColCursor = pair(theme.Cursor, theme.Gutter)
 	ColCursorEmpty = pair(blank, theme.Gutter)
-	ColSelected = pair(theme.Selected, theme.Gutter)
+	if theme.SelectedBg.Color != theme.Bg.Color {
+		ColMarker = pair(theme.Marker, theme.SelectedBg)
+	} else {
+		ColMarker = pair(theme.Marker, theme.Gutter)
+	}
 	ColCurrent = pair(theme.Current, theme.DarkBg)
 	ColCurrentMatch = pair(theme.CurrentMatch, theme.DarkBg)
 	ColCurrentCursor = pair(theme.Cursor, theme.DarkBg)
 	ColCurrentCursorEmpty = pair(blank, theme.DarkBg)
-	ColCurrentSelected = pair(theme.Selected, theme.DarkBg)
+	ColCurrentMarker = pair(theme.Marker, theme.DarkBg)
 	ColCurrentSelectedEmpty = pair(blank, theme.DarkBg)
 	ColSpinner = pair(theme.Spinner, theme.Bg)
 	ColInfo = pair(theme.Info, theme.Bg)
@@ -769,4 +871,9 @@ func initPalette(theme *ColorTheme) {
 	ColPreview = pair(theme.PreviewFg, theme.PreviewBg)
 	ColPreviewBorder = pair(theme.PreviewBorder, theme.PreviewBg)
 	ColPreviewScrollbar = pair(theme.PreviewScrollbar, theme.PreviewBg)
+	ColPreviewSpinner = pair(theme.Spinner, theme.PreviewBg)
+}
+
+func runeWidth(r rune) int {
+	return uniseg.StringWidth(string(r))
 }

src/util/atexit.go

@@ -0,0 +1,28 @@
+package util
+
+import (
+	"sync"
+)
+
+var atExitFuncs []func()
+
+// AtExit registers the function fn to be called on program termination.
+// The functions will be called in reverse order they were registered.
+func AtExit(fn func()) {
+	if fn == nil {
+		panic("AtExit called with nil func")
+	}
+	once := &sync.Once{}
+	atExitFuncs = append(atExitFuncs, func() {
+		once.Do(fn)
+	})
+}
+
+// RunAtExitFuncs runs any functions registered with AtExit().
+func RunAtExitFuncs() {
+	fns := atExitFuncs
+	for i := len(fns) - 1; i >= 0; i-- {
+		fns[i]()
+	}
+	atExitFuncs = nil
+}

src/util/atexit_test.go

@@ -0,0 +1,24 @@
+package util
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestAtExit(t *testing.T) {
+	want := []int{3, 2, 1, 0}
+	var called []int
+	for i := 0; i < 4; i++ {
+		n := i
+		AtExit(func() { called = append(called, n) })
+	}
+	RunAtExitFuncs()
+	if !reflect.DeepEqual(called, want) {
+		t.Errorf("AtExit: want call order: %v got: %v", want, called)
+	}
+
+	RunAtExitFuncs()
+	if !reflect.DeepEqual(called, want) {
+		t.Error("AtExit: should only call exit funcs once")
+	}
+}

src/util/chars.go

@@ -1,6 +1,7 @@
 package util
 
 import (
+	"bytes"
 	"fmt"
 	"unicode"
 	"unicode/utf8"
@@ -74,6 +75,35 @@ func (chars *Chars) Bytes() []byte {
 	return chars.slice
 }
 
+func (chars *Chars) NumLines(atMost int) (int, bool) {
+	lines := 1
+	if runes := chars.optionalRunes(); runes != nil {
+		for _, r := range runes {
+			if r == '\n' {
+				lines++
+			}
+			if lines > atMost {
+				return atMost, true
+			}
+		}
+		return lines, false
+	}
+
+	for idx := 0; idx < len(chars.slice); idx++ {
+		found := bytes.IndexByte(chars.slice[idx:], '\n')
+		if found < 0 {
+			break
+		}
+
+		idx += found
+		lines++
+		if lines > atMost {
+			return atMost, true
+		}
+	}
+	return lines, false
+}
+
 func (chars *Chars) optionalRunes() []rune {
 	if chars.inBytes {
 		return nil
@@ -163,7 +193,7 @@ func (chars *Chars) ToString() string {
 	if runes := chars.optionalRunes(); runes != nil {
 		return string(runes)
 	}
-	return string(chars.slice)
+	return unsafe.String(unsafe.SliceData(chars.slice), len(chars.slice))
 }
 
 func (chars *Chars) ToRunes() []rune {
@@ -178,12 +208,12 @@ func (chars *Chars) ToRunes() []rune {
 	return runes
 }
 
-func (chars *Chars) CopyRunes(dest []rune) {
+func (chars *Chars) CopyRunes(dest []rune, from int) {
 	if runes := chars.optionalRunes(); runes != nil {
-		copy(dest, runes)
+		copy(dest, runes[from:])
 		return
 	}
-	for idx, b := range chars.slice[:len(dest)] {
+	for idx, b := range chars.slice[from:][:len(dest)] {
 		dest[idx] = rune(b)
 	}
 }
@@ -196,3 +226,85 @@ func (chars *Chars) Prepend(prefix string) {
 		chars.slice = append([]byte(prefix), chars.slice...)
 	}
 }
+
+func (chars *Chars) Lines(multiLine bool, maxLines int, wrapCols int, wrapSignWidth int, tabstop int) ([][]rune, bool) {
+	text := make([]rune, chars.Length())
+	copy(text, chars.ToRunes())
+
+	lines := [][]rune{}
+	overflow := false
+	if !multiLine {
+		lines = append(lines, text)
+	} else {
+		from := 0
+		for off := 0; off < len(text); off++ {
+			if text[off] == '\n' {
+				lines = append(lines, text[from:off+1]) // Include '\n'
+				from = off + 1
+				if len(lines) >= maxLines {
+					break
+				}
+			}
+		}
+
+		var lastLine []rune
+		if from < len(text) {
+			lastLine = text[from:]
+		}
+
+		overflow = false
+		if len(lines) >= maxLines {
+			overflow = true
+		} else {
+			lines = append(lines, lastLine)
+		}
+	}
+
+	// If wrapping is disabled, we're done
+	if wrapCols == 0 {
+		return lines, overflow
+	}
+
+	wrapped := [][]rune{}
+	for _, line := range lines {
+		// Remove trailing '\n' and remember if it was there
+		newline := len(line) > 0 && line[len(line)-1] == '\n'
+		if newline {
+			line = line[:len(line)-1]
+		}
+
+		for {
+			cols := wrapCols
+			if len(wrapped) > 0 {
+				cols -= wrapSignWidth
+			}
+			_, overflowIdx := RunesWidth(line, 0, tabstop, cols)
+			if overflowIdx >= 0 {
+				// Might be a wide character
+				if overflowIdx == 0 {
+					overflowIdx = 1
+				}
+				if len(wrapped) >= maxLines {
+					return wrapped, true
+				}
+				wrapped = append(wrapped, line[:overflowIdx])
+				line = line[overflowIdx:]
+				continue
+			}
+
+			// Restore trailing '\n'
+			if newline {
+				line = append(line, '\n')
+			}
+
+			if len(wrapped) >= maxLines {
+				return wrapped, true
+			}
+
+			wrapped = append(wrapped, line)
+			break
+		}
+	}
+
+	return wrapped, false
+}

src/util/chars_test.go

@@ -1,6 +1,9 @@
 package util
 
-import "testing"
+import (
+	"fmt"
+	"testing"
+)
 
 func TestToCharsAscii(t *testing.T) {
 	chars := ToChars([]byte("foobar"))
@@ -44,3 +47,37 @@ func TestTrimLength(t *testing.T) {
 	check("  h   o  ", 5)
 	check("         ", 0)
 }
+
+func TestCharsLines(t *testing.T) {
+	chars := ToChars([]byte("abcdef\n가나다\n\tdef"))
+	check := func(multiLine bool, maxLines int, wrapCols int, wrapSignWidth int, tabstop int, expectedNumLines int, expectedOverflow bool) {
+		lines, overflow := chars.Lines(multiLine, maxLines, wrapCols, wrapSignWidth, tabstop)
+		fmt.Println(lines, overflow)
+		if len(lines) != expectedNumLines || overflow != expectedOverflow {
+			t.Errorf("Invalid result: %d %v (expected %d %v)", len(lines), overflow, expectedNumLines, expectedOverflow)
+		}
+	}
+
+	// No wrap
+	check(true, 1, 0, 0, 8, 1, true)
+	check(true, 2, 0, 0, 8, 2, true)
+	check(true, 3, 0, 0, 8, 3, false)
+
+	// Wrap (2)
+	check(true, 4, 2, 0, 8, 4, true)
+	check(true, 5, 2, 0, 8, 5, true)
+	check(true, 6, 2, 0, 8, 6, true)
+	check(true, 7, 2, 0, 8, 7, true)
+	check(true, 8, 2, 0, 8, 8, true)
+	check(true, 9, 2, 0, 8, 9, false)
+	check(true, 9, 2, 0, 1, 8, false) // Smaller tab size
+
+	// With wrap sign (3 + 1)
+	check(true, 100, 3, 1, 1, 8, false)
+
+	// With wrap sign (3 + 2)
+	check(true, 100, 3, 2, 1, 12, false)
+
+	// With wrap sign (3 + 2) and no multi-line
+	check(false, 100, 3, 2, 1, 13, false)
+}

src/util/util.go

@@ -3,17 +3,17 @@ package util
 import (
 	"math"
 	"os"
+	"strconv"
 	"strings"
 	"time"
 
 	"github.com/mattn/go-isatty"
-	"github.com/mattn/go-runewidth"
 	"github.com/rivo/uniseg"
 )
 
 // StringWidth returns string width where each CR/LF character takes 1 column
 func StringWidth(s string) int {
-	return runewidth.StringWidth(s) + strings.Count(s, "\n") + strings.Count(s, "\r")
+	return uniseg.StringWidth(s) + strings.Count(s, "\n") + strings.Count(s, "\r")
 }
 
 // RunesWidth returns runes width
@@ -138,14 +138,20 @@ func DurWithin(
 	return val
 }
 
-// IsTty returns true if stdin is a terminal
-func IsTty() bool {
-	return isatty.IsTerminal(os.Stdin.Fd())
+// IsTty returns true if the file is a terminal
+func IsTty(file *os.File) bool {
+	fd := file.Fd()
+	return isatty.IsTerminal(fd) || isatty.IsCygwinTerminal(fd)
 }
 
-// ToTty returns true if stdout is a terminal
-func ToTty() bool {
-	return isatty.IsTerminal(os.Stdout.Fd())
+// RunOnce runs the given function only once
+func RunOnce(f func()) func() {
+	once := Once(true)
+	return func() {
+		if once() {
+			f()
+		}
+	}
 }
 
 // Once returns a function that returns the specified boolean value only once
@@ -153,7 +159,7 @@ func Once(nextResponse bool) func() bool {
 	state := nextResponse
 	return func() bool {
 		prevState := state
-		state = false
+		state = !nextResponse
 		return prevState
 	}
 }
@@ -165,7 +171,7 @@ func RepeatToFill(str string, length int, limit int) string {
 	output := strings.Repeat(str, times)
 	if rest > 0 {
 		for _, r := range str {
-			rest -= runewidth.RuneWidth(r)
+			rest -= uniseg.StringWidth(string(r))
 			if rest < 0 {
 				break
 			}
@@ -177,3 +183,46 @@ func RepeatToFill(str string, length int, limit int) string {
 	}
 	return output
 }
+
+// ToKebabCase converts the given CamelCase string to kebab-case
+func ToKebabCase(s string) string {
+	name := ""
+	for i, r := range s {
+		if i > 0 && r >= 'A' && r <= 'Z' {
+			name += "-"
+		}
+		name += string(r)
+	}
+	return strings.ToLower(name)
+}
+
+// CompareVersions compares two version strings
+func CompareVersions(v1, v2 string) int {
+	parts1 := strings.Split(v1, ".")
+	parts2 := strings.Split(v2, ".")
+
+	atoi := func(s string) int {
+		n, e := strconv.Atoi(s)
+		if e != nil {
+			return 0
+		}
+		return n
+	}
+
+	for i := 0; i < Max(len(parts1), len(parts2)); i++ {
+		var p1, p2 int
+		if i < len(parts1) {
+			p1 = atoi(parts1[i])
+		}
+		if i < len(parts2) {
+			p2 = atoi(parts2[i])
+		}
+
+		if p1 > p2 {
+			return 1
+		} else if p1 < p2 {
+			return -1
+		}
+	}
+	return 0
+}

src/util/util_test.go

@@ -137,8 +137,11 @@ func TestOnce(t *testing.T) {
 	if o() {
 		t.Error("Expected: false")
 	}
-	if o() {
-		t.Error("Expected: false")
+	if !o() {
+		t.Error("Expected: true")
+	}
+	if !o() {
+		t.Error("Expected: true")
 	}
 
 	o = Once(true)
@@ -148,6 +151,9 @@ func TestOnce(t *testing.T) {
 	if o() {
 		t.Error("Expected: false")
 	}
+	if o() {
+		t.Error("Expected: false")
+	}
 }
 
 func TestRunesWidth(t *testing.T) {
@@ -164,6 +170,18 @@ func TestRunesWidth(t *testing.T) {
 			t.Errorf("Expected overflow index: %d, actual: %d", args[2], overflowIdx)
 		}
 	}
+	for _, input := range []struct {
+		s string
+		w int
+	}{
+		{"▶", 1},
+		{"▶️", 2},
+	} {
+		width, _ := RunesWidth([]rune(input.s), 0, 0, 100)
+		if width != input.w {
+			t.Errorf("Expected width of %s: %d, actual: %d", input.s, input.w, width)
+		}
+	}
 }
 
 func TestTruncate(t *testing.T) {
@@ -184,3 +202,41 @@ func TestRepeatToFill(t *testing.T) {
 		t.Error("Expected:", strings.Repeat("abcde", 4)+"abcde"[:2])
 	}
 }
+
+func TestStringWidth(t *testing.T) {
+	w := StringWidth("─")
+	if w != 1 {
+		t.Errorf("Expected: %d, Actual: %d", 1, w)
+	}
+}
+
+func TestCompareVersions(t *testing.T) {
+	assert := func(a, b string, expected int) {
+		if result := CompareVersions(a, b); result != expected {
+			t.Errorf("Expected: %d, Actual: %d", expected, result)
+		}
+	}
+
+	assert("2", "1", 1)
+	assert("2", "2", 0)
+	assert("2", "10", -1)
+
+	assert("2.1", "2.2", -1)
+	assert("2.1", "2.1.1", -1)
+
+	assert("1.2.3", "1.2.2", 1)
+	assert("1.2.3", "1.2.3", 0)
+	assert("1.2.3", "1.2.3.0", 0)
+	assert("1.2.3", "1.2.4", -1)
+
+	// Different number of parts
+	assert("1.0.0", "1", 0)
+	assert("1.0.0", "1.0", 0)
+	assert("1.0.0", "1.0.0", 0)
+	assert("1.0", "1.0.0", 0)
+	assert("1", "1.0.0", 0)
+	assert("1.0.0", "1.0.0.1", -1)
+	assert("1.0.0.1.0", "1.0.0.1", 0)
+
+	assert("", "3.4.5", -1)
+}

src/util/util_unix.go

@@ -3,31 +3,71 @@
 package util
 
 import (
+	"fmt"
 	"os"
 	"os/exec"
+	"strings"
 	"syscall"
 
 	"golang.org/x/sys/unix"
 )
 
-// ExecCommand executes the given command with $SHELL
-func ExecCommand(command string, setpgid bool) *exec.Cmd {
-	shell := os.Getenv("SHELL")
-	if len(shell) == 0 {
-		shell = "sh"
-	}
-	return ExecCommandWith(shell, command, setpgid)
+type Executor struct {
+	shell   string
+	args    []string
+	escaper *strings.Replacer
 }
 
-// ExecCommandWith executes the given command with the specified shell
-func ExecCommandWith(shell string, command string, setpgid bool) *exec.Cmd {
-	cmd := exec.Command(shell, "-c", command)
+func NewExecutor(withShell string) *Executor {
+	shell := os.Getenv("SHELL")
+	args := strings.Fields(withShell)
+	if len(args) > 0 {
+		shell = args[0]
+		args = args[1:]
+	} else {
+		if len(shell) == 0 {
+			shell = "sh"
+		}
+		args = []string{"-c"}
+	}
+
+	var escaper *strings.Replacer
+	tokens := strings.Split(shell, "/")
+	if tokens[len(tokens)-1] == "fish" {
+		// https://fishshell.com/docs/current/language.html#quotes
+		// > The only meaningful escape sequences in single quotes are \', which
+		// > escapes a single quote and \\, which escapes the backslash symbol.
+		escaper = strings.NewReplacer("\\", "\\\\", "'", "\\'")
+	} else {
+		escaper = strings.NewReplacer("'", "'\\''")
+	}
+	return &Executor{shell, args, escaper}
+}
+
+// ExecCommand executes the given command with $SHELL
+func (x *Executor) ExecCommand(command string, setpgid bool) *exec.Cmd {
+	cmd := exec.Command(x.shell, append(x.args, command)...)
 	if setpgid {
 		cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 	}
 	return cmd
 }
 
+func (x *Executor) QuoteEntry(entry string) string {
+	return "'" + x.escaper.Replace(entry) + "'"
+}
+
+func (x *Executor) Become(stdin *os.File, environ []string, command string) {
+	shellPath, err := exec.LookPath(x.shell)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "fzf (become): %s\n", err.Error())
+		os.Exit(127)
+	}
+	args := append([]string{shellPath}, append(x.args, command)...)
+	SetStdin(stdin)
+	syscall.Exec(shellPath, args, environ)
+}
+
 // KillCommand kills the process for the given command
 func KillCommand(cmd *exec.Cmd) error {
 	return syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)

src/util/util_windows.go

@@ -6,62 +6,164 @@ import (
 	"fmt"
 	"os"
 	"os/exec"
+	"path/filepath"
+	"regexp"
 	"strings"
 	"sync/atomic"
 	"syscall"
 )
 
-var shellPath atomic.Value
+type shellType int
+
+const (
+	shellTypeUnknown shellType = iota
+	shellTypeCmd
+	shellTypePowerShell
+)
+
+var escapeRegex = regexp.MustCompile(`[&|<>()^%!"]`)
+
+type Executor struct {
+	shell     string
+	shellType shellType
+	args      []string
+	shellPath atomic.Value
+}
+
+func NewExecutor(withShell string) *Executor {
+	shell := os.Getenv("SHELL")
+	args := strings.Fields(withShell)
+	if len(args) > 0 {
+		shell = args[0]
+	} else if len(shell) == 0 {
+		shell = "cmd"
+	}
+
+	shellType := shellTypeUnknown
+	basename := filepath.Base(shell)
+	if len(args) > 0 {
+		args = args[1:]
+	} else if strings.HasPrefix(basename, "cmd") {
+		shellType = shellTypeCmd
+		args = []string{"/s/c"}
+	} else if strings.HasPrefix(basename, "pwsh") || strings.HasPrefix(basename, "powershell") {
+		shellType = shellTypePowerShell
+		args = []string{"-NoProfile", "-Command"}
+	} else {
+		args = []string{"-c"}
+	}
+	return &Executor{shell: shell, shellType: shellType, args: args}
+}
 
 // ExecCommand executes the given command with $SHELL
-func ExecCommand(command string, setpgid bool) *exec.Cmd {
-	var shell string
-	if cached := shellPath.Load(); cached != nil {
+// FIXME: setpgid is unused. We set it in the Unix implementation so that we
+// can kill preview process with its child processes at once.
+// NOTE: For "powershell", we should ideally set output encoding to UTF8,
+// but it is left as is now because no adverse effect has been observed.
+func (x *Executor) ExecCommand(command string, setpgid bool) *exec.Cmd {
+	shell := x.shell
+	if cached := x.shellPath.Load(); cached != nil {
 		shell = cached.(string)
 	} else {
-		shell = os.Getenv("SHELL")
-		if len(shell) == 0 {
-			shell = "cmd"
-		} else if strings.Contains(shell, "/") {
+		if strings.Contains(shell, "/") {
 			out, err := exec.Command("cygpath", "-w", shell).Output()
 			if err == nil {
 				shell = strings.Trim(string(out), "\n")
 			}
 		}
-		shellPath.Store(shell)
+		x.shellPath.Store(shell)
 	}
-	return ExecCommandWith(shell, command, setpgid)
-}
-
-// ExecCommandWith executes the given command with the specified shell
-// FIXME: setpgid is unused. We set it in the Unix implementation so that we
-// can kill preview process with its child processes at once.
-// NOTE: For "powershell", we should ideally set output encoding to UTF8,
-// but it is left as is now because no adverse effect has been observed.
-func ExecCommandWith(shell string, command string, setpgid bool) *exec.Cmd {
 	var cmd *exec.Cmd
-	if strings.Contains(shell, "cmd") {
+	if x.shellType == shellTypeCmd {
 		cmd = exec.Command(shell)
 		cmd.SysProcAttr = &syscall.SysProcAttr{
 			HideWindow:    false,
-			CmdLine:       fmt.Sprintf(` /v:on/s/c "%s"`, command),
+			CmdLine:       fmt.Sprintf(`%s "%s"`, strings.Join(x.args, " "), command),
 			CreationFlags: 0,
 		}
-		return cmd
-	}
-
-	if strings.Contains(shell, "pwsh") || strings.Contains(shell, "powershell") {
-		cmd = exec.Command(shell, "-NoProfile", "-Command", command)
 	} else {
-		cmd = exec.Command(shell, "-c", command)
-	}
-	cmd.SysProcAttr = &syscall.SysProcAttr{
-		HideWindow:    false,
-		CreationFlags: 0,
+		cmd = exec.Command(shell, append(x.args, command)...)
+		cmd.SysProcAttr = &syscall.SysProcAttr{
+			HideWindow:    false,
+			CreationFlags: 0,
+		}
 	}
 	return cmd
 }
 
+func (x *Executor) Become(stdin *os.File, environ []string, command string) {
+	cmd := x.ExecCommand(command, false)
+	cmd.Stdin = stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Env = environ
+	err := cmd.Start()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "fzf (become): %s\n", err.Error())
+		os.Exit(127)
+	}
+	err = cmd.Wait()
+	if err != nil {
+		if exitError, ok := err.(*exec.ExitError); ok {
+			os.Exit(exitError.ExitCode())
+		}
+	}
+	os.Exit(0)
+}
+
+func escapeArg(s string) string {
+	b := make([]byte, 0, len(s)+2)
+	b = append(b, '"')
+	slashes := 0
+	for i := 0; i < len(s); i++ {
+		c := s[i]
+		switch c {
+		default:
+			slashes = 0
+		case '\\':
+			slashes++
+		case '"':
+			for ; slashes > 0; slashes-- {
+				b = append(b, '\\')
+			}
+			b = append(b, '\\')
+		}
+		b = append(b, c)
+	}
+	for ; slashes > 0; slashes-- {
+		b = append(b, '\\')
+	}
+	b = append(b, '"')
+	return escapeRegex.ReplaceAllStringFunc(string(b), func(match string) string {
+		return "^" + match
+	})
+}
+
+func (x *Executor) QuoteEntry(entry string) string {
+	switch x.shellType {
+	case shellTypeCmd:
+		/* Manually tested with the following commands:
+		   fzf --preview "echo {}"
+		   fzf --preview "type {}"
+		   echo .git\refs\| fzf --preview "dir {}"
+		   echo .git\refs\\| fzf --preview "dir {}"
+		   echo .git\refs\\\| fzf --preview "dir {}"
+		   reg query HKCU | fzf --reverse --bind "enter:reload(reg query {})"
+		   fzf --disabled --preview "echo {q} {n} {}" --query "&|<>()@^%!"
+		   fd -H --no-ignore -td -d 4 | fzf --preview "dir {}"
+		   fd -H --no-ignore -td -d 4 | fzf --preview "eza {}" --preview-window up
+		   fd -H --no-ignore -td -d 4 | fzf --preview "eza --color=always --tree --level=3 --icons=always {}"
+		   fd -H --no-ignore -td -d 4 | fzf --preview ".\eza.exe --color=always --tree --level=3 --icons=always {}" --with-shell "powershell -NoProfile -Command"
+		*/
+		return escapeArg(entry)
+	case shellTypePowerShell:
+		escaped := strings.ReplaceAll(entry, `"`, `\"`)
+		return "'" + strings.ReplaceAll(escaped, "'", "''") + "'"
+	default:
+		return "'" + strings.ReplaceAll(entry, "'", "'\\''") + "'"
+	}
+}
+
 // KillCommand kills the process for the given command
 func KillCommand(cmd *exec.Cmd) error {
 	return cmd.Process.Kill()

src/winpty.go

@@ -0,0 +1,13 @@
+//go:build !windows
+
+package fzf
+
+import "errors"
+
+func needWinpty(_ *Options) bool {
+	return false
+}
+
+func runWinpty(_ []string, _ *Options) (int, error) {
+	return ExitError, errors.New("Not supported")
+}

src/winpty_windows.go

@@ -0,0 +1,80 @@
+//go:build windows
+
+package fzf
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func isMintty345() bool {
+	return util.CompareVersions(os.Getenv("TERM_PROGRAM_VERSION"), "3.4.5") >= 0
+}
+
+func needWinpty(opts *Options) bool {
+	if os.Getenv("TERM_PROGRAM") != "mintty" {
+		return false
+	}
+	if isMintty345() {
+		/*
+		 See: https://github.com/junegunn/fzf/issues/3809
+
+		 "MSYS=enable_pcon" allows fzf to run properly on mintty 3.4.5 or later.
+		*/
+		if strings.Contains(os.Getenv("MSYS"), "enable_pcon") {
+			return false
+		}
+
+		// Setting the environment variable here unfortunately doesn't help,
+		// so we need to start a child process with "MSYS=enable_pcon"
+		//   os.Setenv("MSYS", "enable_pcon")
+		return true
+	}
+	if opts.NoWinpty {
+		return false
+	}
+	if _, err := exec.LookPath("winpty"); err != nil {
+		return false
+	}
+	return true
+}
+
+func runWinpty(args []string, opts *Options) (int, error) {
+	argStr := escapeSingleQuote(args[0])
+	for _, arg := range args[1:] {
+		argStr += " " + escapeSingleQuote(arg)
+	}
+	argStr += ` --no-winpty`
+
+	if isMintty345() {
+		return runProxy(argStr, func(temp string, needBash bool) (*exec.Cmd, error) {
+			sh, err := sh(needBash)
+			if err != nil {
+				return nil, err
+			}
+
+			cmd := exec.Command(sh, temp)
+			cmd.Env = append(os.Environ(), "MSYS=enable_pcon")
+			cmd.Stdin = os.Stdin
+			cmd.Stdout = os.Stdout
+			cmd.Stderr = os.Stderr
+			return cmd, nil
+		}, opts, false)
+	}
+
+	return runProxy(argStr, func(temp string, needBash bool) (*exec.Cmd, error) {
+		sh, err := sh(needBash)
+		if err != nil {
+			return nil, err
+		}
+
+		cmd := exec.Command(sh, "-c", fmt.Sprintf(`winpty < /dev/tty > /dev/tty -- sh %q`, temp))
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+		return cmd, nil
+	}, opts, false)
+}