0.10.1

This reverts commit 6166e2dd80.

.gitignore

@@ -1,2 +1,5 @@
+bin
+src/fzf/fzf_*
 pkg
 Gemfile.lock
+.DS_Store

.travis.yml

@@ -0,0 +1,24 @@
+language: ruby
+rvm:
+- 2.2.0
+
+install:
+- sudo apt-get update
+- sudo apt-get install -y libncurses-dev lib32ncurses5-dev
+- sudo add-apt-repository -y ppa:pi-rho/dev
+- sudo apt-add-repository -y ppa:fish-shell/release-2
+- sudo apt-get update
+- sudo apt-get install -y tmux=1.9a-1~ppa1~p
+- sudo apt-get install -y zsh fish
+
+script: |
+  export GOPATH=~/go
+  export FZF_BASE=$GOPATH/src/github.com/junegunn/fzf
+
+  mkdir -p $GOPATH/src/github.com/junegunn
+  ln -s $(pwd) $FZF_BASE
+
+  cd $FZF_BASE/src && make test fzf/fzf-linux_amd64 install &&
+  cd $FZF_BASE/bin && ln -sf fzf-linux_amd64 fzf-$(./fzf --version)-linux_amd64 &&
+  cd $FZF_BASE && yes | ./install && rm -f fzf &&
+  tmux new "ruby test/test_go.rb > out && touch ok" && cat out && [ -e ok ]

CHANGELOG.md

@@ -0,0 +1,259 @@
+CHANGELOG
+=========
+
+0.10.1
+------
+
+### New features
+
+- Added `--margin` option
+- Added options for sticky header
+    - `--header-file`
+    - `--header-lines`
+- Added `cancel` action which clears the input or closes the finder when the
+  input is already empty
+    - e.g. `export FZF_DEFAULT_OPTS="--bind esc:cancel"`
+- Added `delete-char/eof` action to differentiate `CTRL-D` and `DEL`
+
+### Minor improvements/fixes
+
+- Fixed to allow binding colon and comma keys
+- Fixed ANSI processor to handle color regions spanning multiple lines
+
+0.10.0
+------
+
+### New features
+
+- More actions for `--bind`
+    - `select-all`
+    - `deselect-all`
+    - `toggle-all`
+    - `ignore`
+- `execute(...)` action for running arbitrary command without leaving fzf
+    - `fzf --bind "ctrl-m:execute(less {})"`
+    - `fzf --bind "ctrl-t:execute(tmux new-window -d 'vim {}')"`
+    - If the command contains parentheses, use any of the follows alternative
+      notations to avoid parse errors
+        - `execute[...]`
+        - `execute~...~`
+        - `execute!...!`
+        - `execute@...@`
+        - `execute#...#`
+        - `execute$...$`
+        - `execute%...%`
+        - `execute^...^`
+        - `execute&...&`
+        - `execute*...*`
+        - `execute;...;`
+        - `execute/.../`
+        - `execute|...|`
+        - `execute:...`
+            - This is the special form that frees you from parse errors as it
+              does not expect the closing character
+            - The catch is that it should be the last one in the
+              comma-separated list
+- Added support for optional search history
+    - `--history HISTORY_FILE`
+        - When used, `CTRL-N` and `CTRL-P` are automatically remapped to
+          `next-history` and `previous-history`
+    - `--history-size MAX_ENTRIES` (default: 1000)
+- Cyclic scrolling can be enabled with `--cycle`
+- Fixed the bug where the spinner was not spinning on idle input stream
+    - e.g. `sleep 100 | fzf`
+
+### Minor improvements/fixes
+
+- Added synonyms for key names that can be specified for `--bind`,
+  `--toggle-sort`, and `--expect`
+- Fixed the color of multi-select marker on the current line
+- Fixed to allow `^pattern$` in extended-search mode
+
+
+0.9.13
+------
+
+### New features
+
+- Color customization with the extended `--color` option
+
+### Bug fixes
+
+- Fixed premature termination of Reader in the presence of a long line which
+  is longer than 64KB
+
+0.9.12
+------
+
+### New features
+
+- Added `--bind` option for custom key bindings
+
+### Bug fixes
+
+- Fixed to update "inline-info" immediately after terminal resize
+- Fixed ANSI code offset calculation
+
+0.9.11
+------
+
+### New features
+
+- Added `--inline-info` option for saving screen estate (#202)
+     - Useful inside Neovim
+     - e.g. `let $FZF_DEFAULT_OPTS = $FZF_DEFAULT_OPTS.' --inline-info'`
+
+### Bug fixes
+
+- Invalid mutation of input on case conversion (#209)
+- Smart-case for each term in extended-search mode (#208)
+- Fixed double-click result when scroll offset is positive
+
+0.9.10
+------
+
+### Improvements
+
+- Performance optimization
+- Less aggressive memoization to limit memory usage
+
+### New features
+
+- Added color scheme for light background: `--color=light`
+
+0.9.9
+-----
+
+### New features
+
+- Added `--tiebreak` option (#191)
+- Added `--no-hscroll` option (#193)
+- Visual indication of `--toggle-sort` (#194)
+
+0.9.8
+-----
+
+### Bug fixes
+
+- Fixed Unicode case handling (#186)
+- Fixed to terminate on RuneError (#185)
+
+0.9.7
+-----
+
+### New features
+
+- Added `--toggle-sort` option (#173)
+    - `--toggle-sort=ctrl-r` is applied to `CTRL-R` shell extension
+
+### Bug fixes
+
+- Fixed to print empty line if `--expect` is set and fzf is completed by
+  `--select-1` or `--exit-0` (#172)
+- Fixed to allow comma character as an argument to `--expect` option
+
+0.9.6
+-----
+
+### New features
+
+#### Added `--expect` option (#163)
+
+If you provide a comma-separated list of keys with `--expect` option, fzf will
+allow you to select the match and complete the finder when any of the keys is
+pressed. Additionally, fzf will print the name of the key pressed as the first
+line of the output so that your script can decide what to do next based on the
+information.
+
+```sh
+fzf --expect=ctrl-v,ctrl-t,alt-s,f1,f2,~,@
+```
+
+The updated vim plugin uses this option to implement
+[ctrlp](https://github.com/kien/ctrlp.vim)-compatible key bindings.
+
+### Bug fixes
+
+- Fixed to ignore ANSI escape code `\e[K` (#162)
+
+0.9.5
+-----
+
+### New features
+
+#### Added `--ansi` option (#150)
+
+If you give `--ansi` option to fzf, fzf will interpret ANSI color codes from
+the input, display the item with the ANSI colors (true colors are not
+supported), and strips the codes from the output. This option is off by
+default as it entails some overhead.
+
+### Improvements
+
+#### Reduced initial memory footprint (#151)
+
+By removing unnecessary copy of pointers, fzf will use significantly smaller
+amount of memory when it's started. The difference is hugely noticeable when
+the input is extremely large. (e.g. `locate / | fzf`)
+
+### Bug fixes
+
+- Fixed panic on `--no-sort --filter ''` (#149)
+
+0.9.4
+-----
+
+### New features
+
+#### Added `--tac` option to reverse the order of the input.
+
+One might argue that this option is unnecessary since we can already put `tac`
+or `tail -r` in the command pipeline to achieve the same result. However, the
+advantage of `--tac` is that it does not block until the input is complete.
+
+### *Backward incompatible changes*
+
+#### Changed behavior on `--no-sort`
+
+`--no-sort` option will no longer reverse the display order within finder. You
+may want to use the new `--tac` option with `--no-sort`.
+
+```
+history | fzf +s --tac
+```
+
+### Improvements
+
+#### `--filter` will not block when sort is disabled
+
+When fzf works in filtering mode (`--filter`) and sort is disabled
+(`--no-sort`), there's no need to block until input is complete. The new
+version of fzf will print the matches on-the-fly when the following condition
+is met:
+
+    --filter TERM --no-sort [--no-tac --no-sync]
+
+or simply:
+
+    -f TERM +s
+
+This change removes unnecessary delay in the use cases like the following:
+
+    fzf -f xxx +s | head -5
+
+However, in this case, fzf processes the lines sequentially, so it cannot
+utilize multiple cores, and fzf will run slightly slower than the previous
+mode of execution where filtering is done in parallel after the entire input
+is loaded. If the user is concerned about this performance problem, one can
+add `--sync` option to re-enable buffering.
+
+0.9.3
+-----
+
+### New features
+- Added `--sync` option for multi-staged filtering
+
+### Improvements
+- `--select-1` and `--exit-0` will start finder immediately when the condition
+  cannot be met
+

Gemfile

@@ -1,4 +0,0 @@
-source 'https://rubygems.org'
-
-# Specify your gem's dependencies in fzf.gemspec
-gemspec

LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Junegunn Choi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

@@ -1,74 +1,89 @@
-fzf - Fuzzy finder for your shell
-=================================
+<img src="https://raw.githubusercontent.com/junegunn/i/master/fzf.png" height="170" alt="fzf - a command-line fuzzy finder"> [![travis-ci](https://travis-ci.org/junegunn/fzf.svg?branch=master)](https://travis-ci.org/junegunn/fzf) <a href="http://flattr.com/thing/3115381/junegunnfzf-on-GitHub" target="_blank"><img src="http://api.flattr.com/button/flattr-badge-large.png" alt="Flattr this" title="Flattr this" border="0" /></a>
+===
 
-fzf is a general-purpose fuzzy finder for your shell.
+fzf is a general-purpose command-line fuzzy finder.
 
 ![](https://raw.github.com/junegunn/i/master/fzf.gif)
 
-It was heavily inspired by [ctrlp.vim](https://github.com/kien/ctrlp.vim) and
-the likes.
+Pros
+----
 
-Requirements
-------------
-
-fzf requires Ruby (>= 1.8.5).
+- No dependencies
+- Blazingly fast
+    - e.g. `locate / | fzf`
+- Flexible layout
+    - Runs in fullscreen or in horizontal/vertical split using tmux
+- The most comprehensive feature set
+    - Try `fzf --help` and be surprised
+- Batteries included
+    - Vim/Neovim plugin, key bindings and fuzzy auto-completion
 
 Installation
 ------------
 
-Download fzf executable and put it somewhere in your search $PATH.
+fzf project consists of the followings:
 
-```sh
-mkdir -p ~/bin
-wget https://raw.github.com/junegunn/fzf/master/fzf -O ~/bin/fzf
-chmod +x ~/bin/fzf
-```
+- `fzf` executable
+- `fzf-tmux` script for launching fzf in a tmux pane
+- Shell extensions
+    - Key bindings (`CTRL-T`, `CTRL-R`, and `ALT-C`) (bash, zsh, fish)
+    - Fuzzy auto-completion (bash, zsh)
+- Vim/Neovim plugin
 
-Or you can just clone this repository and run
+You can [download fzf executable][bin] alone, but it's recommended that you
+install the extra stuff using the attached install script.
+
+[bin]: https://github.com/junegunn/fzf-bin/releases
+
+#### Using git (recommended)
+
+Clone this repository and run
 [install](https://github.com/junegunn/fzf/blob/master/install) script.
 
 ```sh
-git clone https://github.com/junegunn/fzf.git
-fzf/install
+git clone --depth 1 https://github.com/junegunn/fzf.git ~/.fzf
+~/.fzf/install
 ```
 
-Make sure that ~/bin is included in $PATH.
+#### Using Homebrew
+
+On OS X, you can use [Homebrew](http://brew.sh/) to install fzf.
 
 ```sh
-export PATH=$PATH:~/bin
+brew reinstall --HEAD fzf
+
+# Install shell extensions
+/usr/local/Cellar/fzf/HEAD/install
 ```
 
-Install as Vim plugin
----------------------
+#### Install as Vim plugin
 
-fzf was not designed to be a Vim plugin, but you can use it as one. The only
-reason one might consider using fzf in Vim is its speed. For a very large list
-of files, fzf is significantly faster than native Vim plugins.
+Once you have cloned the repository, add the following line to your .vimrc.
 
-You can use any Vim plugin manager to install fzf as a Vim plugin. If you don't
-use one, I recommend you try [vim-plug](https://github.com/junegunn/vim-plug).
+```vim
+set rtp+=~/.fzf
+```
 
-1. [Install vim-plug](https://github.com/junegunn/vim-plug#usage)
-2. Edit your .vimrc
+Or you can have [vim-plug](https://github.com/junegunn/vim-plug) manage fzf
+(recommended):
 
-        call plug#begin()
-        Plug 'junegunn/fzf'
-        " ...
-        call plug#end()
+```vim
+Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': 'yes \| ./install' }
+```
 
-3. Run `:PlugInstall`
+#### Upgrading fzf
+
+fzf is being actively developed and you might want to upgrade it once in a
+while. Please follow the instruction below depending on the installation
+method.
+
+- git: `cd ~/.fzf && git pull && ./install`
+- brew: `brew reinstall --HEAD fzf`
+- vim-plug: `:PlugUpdate fzf`
 
 Usage
 -----
 
-```
-usage: fzf [options]
-
-  -s, --sort=MAX   Maximum number of matched items to sort. Default: 500
-  +s, --no-sort    Keep the sequence unchanged.
-  +i               Case-sensitive match
-```
-
 fzf will launch curses-based finder, read the list from STDIN, and write the
 selected item to STDOUT.
 
@@ -77,87 +92,353 @@ find * -type f | fzf > selected
 ```
 
 Without STDIN pipe, fzf will use find command to fetch the list of
-files (excluding hidden ones).
+files excluding hidden ones. (You can override the default command with
+`FZF_DEFAULT_COMMAND`)
 
 ```sh
-vim `fzf`
+vim $(fzf)
 ```
 
-If you want to preserve the exact sequence of the input, provide `--no-sort` (or
-`+s`) option.
+#### Using the finder
+
+- `CTRL-J` / `CTRL-K` (or `CTRL-N` / `CTRL-P)` to move cursor up and down
+- `Enter` key to select the item, `CTRL-C` / `CTRL-G` / `ESC` to exit
+- On multi-select mode (`-m`), `TAB` and `Shift-TAB` to mark multiple items
+- Emacs style key bindings
+- Mouse: scroll, click, double-click; shift-click and shift-scroll on
+  multi-select mode
+
+#### Extended-search mode
+
+With `-x` or `--extended` option, fzf will start in "extended-search mode".
+
+In this mode, you can specify multiple patterns delimited by spaces,
+such as: `^music .mp3$ sbtrkt !rmx`
+
+| Token    | Description                      | Match type           |
+| -------- | -------------------------------- | -------------------- |
+| `^music` | Items that start with `music`    | prefix-exact-match   |
+| `.mp3$`  | Items that end with `.mp3`       | suffix-exact-match   |
+| `sbtrkt` | Items that match `sbtrkt`        | fuzzy-match          |
+| `!rmx`   | Items that do not match `rmx`    | inverse-fuzzy-match  |
+| `'wild`  | Items that include `wild`        | exact-match (quoted) |
+| `!'fire` | Items that do not include `fire` | inverse-exact-match  |
+
+If you don't need fuzzy matching and do not wish to "quote" every word, start
+fzf with `-e` or `--extended-exact` option.
+
+#### Environment variables
+
+- `FZF_DEFAULT_COMMAND`
+    - Default command to use when input is tty
+- `FZF_DEFAULT_OPTS`
+    - Default options. e.g. `export FZF_DEFAULT_OPTS="--extended --cycle"`
+
+Examples
+--------
+
+Many useful examples can be found on [the wiki
+page](https://github.com/junegunn/fzf/wiki/examples). Feel free to add your
+own as well.
+
+Key bindings for command line
+-----------------------------
+
+The install script will setup the following key bindings for bash, zsh, and
+fish.
+
+- `CTRL-T` - Paste the selected files and directories onto the command line
+    - Set `FZF_CTRL_T_COMMAND` to override the default command
+- `CTRL-R` - Paste the selected command from history onto the command line
+    - Sort is disabled by default to respect chronological ordering
+    - Press `CTRL-R` again to toggle sort
+- `ALT-C` - cd into the selected directory
+
+If you're on a tmux session, fzf will start in a split pane. You may disable
+this tmux integration by setting `FZF_TMUX` to 0, or change the height of the
+pane with `FZF_TMUX_HEIGHT` (e.g. `20`, `50%`).
+
+If you use vi mode on bash, you need to add `set -o vi` *before* `source
+~/.fzf.bash` in your .bashrc, so that it correctly sets up key bindings for vi
+mode.
+
+`fzf-tmux` script
+-----------------
+
+[fzf-tmux](bin/fzf-tmux) is a bash script that opens fzf in a tmux pane.
 
 ```sh
-history | fzf +s
+# usage: fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
+#        (-[udlr]: up/down/left/right)
+
+# select git branches in horizontal split below (15 lines)
+git branch | fzf-tmux -d 15
+
+# select multiple words in vertical split on the left (20% of screen width)
+cat /usr/share/dict/words | fzf-tmux -l 20% --multi --reverse
 ```
 
-### Key binding
+It will still work even when you're not on tmux, silently ignoring `-[udlr]`
+options, so you can invariably use `fzf-tmux` in your scripts.
 
-Use CTRL-J and CTRL-K (or CTRL-N and CTRL-P) to change the selection, press
-enter key to select the item. CTRL-C will terminate the finder.
+Fuzzy completion for bash and zsh
+---------------------------------
 
-The following readline key bindings should also work as expected.
+#### Files and directories
 
-- CTRL-A / CTRL-E
-- CTRL-B / CTRL-F
-- CTRL-W / CTRL-U
+Fuzzy completion for files and directories can be triggered if the word before
+the cursor ends with the trigger sequence which is by default `**`.
+
+- `COMMAND [DIRECTORY/][FUZZY_PATTERN]**<TAB>`
+
+```sh
+# Files under current directory
+# - You can select multiple items with TAB key
+vim **<TAB>
+
+# Files under parent directory
+vim ../**<TAB>
+
+# Files under parent directory that match `fzf`
+vim ../fzf**<TAB>
+
+# Files under your home directory
+vim ~/**<TAB>
+
+
+# Directories under current directory (single-selection)
+cd **<TAB>
+
+# Directories under ~/github that match `fzf`
+cd ~/github/fzf**<TAB>
+```
+
+#### Process IDs
+
+Fuzzy completion for PIDs is provided for kill command. In this case
+there is no trigger sequence, just press tab key after kill command.
+
+```sh
+# Can select multiple processes with <TAB> or <Shift-TAB> keys
+kill -9 <TAB>
+```
+
+#### Host names
+
+For ssh and telnet commands, fuzzy completion for host names is provided. The
+names are extracted from /etc/hosts and ~/.ssh/config.
+
+```sh
+ssh **<TAB>
+telnet **<TAB>
+```
+
+#### Environment variables / Aliases
+
+```sh
+unset **<TAB>
+export **<TAB>
+unalias **<TAB>
+```
+
+#### Settings
+
+```sh
+# Use ~~ as the trigger sequence instead of the default **
+export FZF_COMPLETION_TRIGGER='~~'
+
+# Options to fzf command
+export FZF_COMPLETION_OPTS='+c -x'
+```
 
 Usage as Vim plugin
 -------------------
 
-If you install fzf as a Vim plugin, `:FZF` command will be added.
+(Note: To use fzf in GVim, an external terminal emulator is required.)
+
+#### `:FZF[!]`
+
+If you have set up fzf for Vim, `:FZF` command will be added.
 
 ```vim
+" Look for files under current directory
 :FZF
-:FZF --no-sort
+
+" Look for files under your home directory
+:FZF ~
+
+" With options
+:FZF --no-sort -m /tmp
+
+" Bang version starts in fullscreen instead of using tmux pane or Neovim split
+:FZF!
 ```
 
-You can override the command which produces input to fzf.
+Similarly to [ctrlp.vim](https://github.com/kien/ctrlp.vim), use enter key,
+`CTRL-T`, `CTRL-X` or `CTRL-V` to open selected files in the current window,
+in new tabs, in horizontal splits, or in vertical splits respectively.
+
+Note that the environment variables `FZF_DEFAULT_COMMAND` and
+`FZF_DEFAULT_OPTS` also apply here. Refer to [the wiki page][fzf-config] for
+customization.
+
+[fzf-config]: https://github.com/junegunn/fzf/wiki/Configuring-FZF-command-(vim)
+
+#### `fzf#run([options])`
+
+For more advanced uses, you can call `fzf#run()` function which returns the list
+of the selected items.
+
+`fzf#run()` may take an options-dictionary:
+
+| Option name                | Type          | Description                                                      |
+| -------------------------- | ------------- | ---------------------------------------------------------------- |
+| `source`                   | string        | External command to generate input to fzf (e.g. `find .`)        |
+| `source`                   | list          | Vim list as input to fzf                                         |
+| `sink`                     | string        | Vim command to handle the selected item (e.g. `e`, `tabe`)       |
+| `sink`                     | funcref       | Reference to function to process each selected item              |
+| `sink*`                    | funcref       | Similar to `sink`, but takes the list of output lines at once    |
+| `options`                  | string        | Options to fzf                                                   |
+| `dir`                      | string        | Working directory                                                |
+| `up`/`down`/`left`/`right` | number/string | Use tmux pane with the given size (e.g. `20`, `50%`)             |
+| `window` (*Neovim only*)   | string        | Command to open fzf window (e.g. `vertical aboveleft 30new`)     |
+| `launcher`                 | string        | External terminal emulator to start fzf with (GVim only)         |
+| `launcher`                 | funcref       | Function for generating `launcher` string (GVim only)            |
+
+_However on Neovim `fzf#run` is asynchronous and does not return values so you
+should use `sink` or `sink*` to process the output from fzf._
+
+##### Examples
+
+If `sink` option is not given, `fzf#run` will simply return the list.
 
 ```vim
-let g:fzf_command = 'find . -type f'
+let items = fzf#run({ 'options': '-m +c', 'dir': '~', 'source': 'ls' })
 ```
 
-Useful bash examples
---------------------
+But if `sink` is given as a string, the command will be executed for each
+selected item.
+
+```vim
+" Each selected item will be opened in a new tab
+let items = fzf#run({ 'sink': 'tabe', 'options': '-m +c', 'dir': '~', 'source': 'ls' })
+```
+
+We can also use a Vim list as the source as follows:
+
+```vim
+" Choose a color scheme with fzf
+nnoremap <silent> <Leader>C :call fzf#run({
+\   'source':
+\     map(split(globpath(&rtp, "colors/*.vim"), "\n"),
+\         "substitute(fnamemodify(v:val, ':t'), '\\..\\{-}$', '', '')"),
+\   'sink':     'colo',
+\   'options':  '+m',
+\   'left':     20,
+\   'launcher': 'xterm -geometry 20x30 -e bash -ic %s'
+\ })<CR>
+```
+
+`sink` option can be a function reference. The following example creates a
+handy mapping that selects an open buffer.
+
+```vim
+" List of buffers
+function! s:buflist()
+  redir => ls
+  silent ls
+  redir END
+  return split(ls, '\n')
+endfunction
+
+function! s:bufopen(e)
+  execute 'buffer' matchstr(a:e, '^[ 0-9]*')
+endfunction
+
+nnoremap <silent> <Leader><Enter> :call fzf#run({
+\   'source':  reverse(<sid>buflist()),
+\   'sink':    function('<sid>bufopen'),
+\   'options': '+m',
+\   'down':    len(<sid>buflist()) + 2
+\ })<CR>
+```
+
+More examples can be found on [the wiki
+page](https://github.com/junegunn/fzf/wiki/Examples-(vim)).
+
+Tips
+----
+
+#### Rendering issues
+
+If you have any rendering issues, check the followings:
+
+1. Make sure `$TERM` is correctly set. fzf will use 256-color only if it
+   contains `256` (e.g. `xterm-256color`)
+2. If you're on screen or tmux, `$TERM` should be either `screen` or
+   `screen-256color`
+3. Some terminal emulators (e.g. mintty) have problem displaying default
+   background color and make some text unable to read. In that case, try
+   `--black` option. And if it solves your problem, I recommend including it
+   in `FZF_DEFAULT_OPTS` for further convenience.
+4. If you still have problem, try `--no-256` option or even `--no-color`.
+
+#### Respecting `.gitignore`, `.hgignore`, and `svn:ignore`
+
+[ag](https://github.com/ggreer/the_silver_searcher) or
+[pt](https://github.com/monochromegane/the_platinum_searcher) will do the
+filtering:
 
 ```sh
-# vimf - Open selected file in Vim
-vimf() {
-  FILE=`fzf` && vim "$FILE"
-}
+# Feed the output of ag into fzf
+ag -l -g "" | fzf
 
-# fd - cd to selected directory
-fd() {
-  DIR=`find ${1:-*} -path '*/\.*' -prune -o -type d -print 2> /dev/null | fzf` && cd "$DIR"
-}
+# Setting ag as the default source for fzf
+export FZF_DEFAULT_COMMAND='ag -l -g ""'
 
-# fda - including hidden directories
-fda() {
-  DIR=`find ${1:-*} -type d 2> /dev/null | fzf` && cd "$DIR"
-}
+# Now fzf (w/o pipe) will use ag instead of find
+fzf
 
-# fh - repeat history
-fh() {
-  eval $(history | fzf +s | sed 's/ *[0-9]* *//')
-}
+# To apply the command to CTRL-T as well
+export FZF_CTRL_T_COMMAND="$FZF_DEFAULT_COMMAND"
+```
 
-# fkill - kill process
-fkill() {
-  ps -ef | sed 1d | fzf | awk '{print $2}' | xargs kill -${1:-9}
-}
+#### `git ls-tree` for fast traversal
 
-# CTRL-T - Open fuzzy finder and paste the selected item to the command line
-bind '"\er": redraw-current-line'
-bind '"\C-t": " \C-u \C-a\C-k$(fzf)\e\C-e\C-y\C-a\C-y\ey\C-h\C-e\er"'
+If you're running fzf in a large git repository, `git ls-tree` can boost up the
+speed of the traversal.
+
+```sh
+export FZF_DEFAULT_COMMAND='
+  (git ls-tree -r --name-only HEAD ||
+   find * -name ".*" -prune -o -type f -print -o -type l -print) 2> /dev/null'
+```
+
+#### Fish shell
+
+It's [a known bug of fish](https://github.com/fish-shell/fish-shell/issues/1362)
+that it doesn't allow reading from STDIN in command substitution, which means
+simple `vim (fzf)` won't work as expected. The workaround is to store the result
+of fzf to a temporary file.
+
+```sh
+fzf > $TMPDIR/fzf.result; and vim (cat $TMPDIR/fzf.result)
+```
+
+#### Handling UTF-8 NFD paths on OSX
+
+Use iconv to convert NFD paths to NFC:
+
+```sh
+find . | iconv -f utf-8-mac -t utf8//ignore | fzf
 ```
 
 License
 -------
 
-MIT
+[MIT](LICENSE)
 
 Author
 ------
 
 Junegunn Choi
-

Rakefile

@@ -1 +0,0 @@
-require "bundler/gem_tasks"

bin/fzf-tmux

@@ -0,0 +1,136 @@
+#!/usr/bin/env bash
+# fzf-tmux: starts fzf in a tmux pane
+# usage: fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
+
+args=()
+opt=""
+skip=""
+swap=""
+close=""
+term=""
+while [ $# -gt 0 ]; do
+  arg="$1"
+  case "$arg" in
+    -)
+      term=1
+      ;;
+    -w*|-h*|-d*|-u*|-r*|-l*)
+      if [ -n "$skip" ]; then
+        args+=("$1")
+        shift
+        continue
+      fi
+      if [[ "$arg" =~ ^.[lrw] ]]; then
+        opt="-h"
+        if [[ "$arg" =~ ^.l ]]; then
+          opt="$opt -d"
+          swap="; swap-pane -D ; select-pane -L"
+          close="; tmux swap-pane -D"
+        fi
+      else
+        opt=""
+        if [[ "$arg" =~ ^.u ]]; then
+          opt="$opt -d"
+          swap="; swap-pane -D ; select-pane -U"
+          close="; tmux swap-pane -D"
+        fi
+      fi
+      if [ ${#arg} -gt 2 ]; then
+        size="${arg:2}"
+      else
+        shift
+        if [[ "$1" =~ ^[0-9]+%?$ ]]; then
+          size="$1"
+        else
+          [ -n "$1" -a "$1" != "--" ] && args+=("$1")
+          shift
+          continue
+        fi
+      fi
+
+      if [[ "$size" =~ %$ ]]; then
+        size=${size:0:((${#size}-1))}
+        if [ -n "$swap" ]; then
+          opt="$opt -p $(( 100 - size ))"
+        else
+          opt="$opt -p $size"
+        fi
+      else
+        if [ -n "$swap" ]; then
+          if [[ "$arg" =~ ^.l ]]; then
+            [ -n "$COLUMNS" ] && max=$COLUMNS || max=$(tput cols)
+          else
+            [ -n "$LINES" ] && max=$LINES || max=$(tput lines)
+          fi
+          size=$(( max - size ))
+          [ $size -lt 0 ] && size=0
+          opt="$opt -l $size"
+        else
+          opt="$opt -l $size"
+        fi
+      fi
+      ;;
+    --)
+      # "--" can be used to separate fzf-tmux options from fzf options to
+      # avoid conflicts
+      skip=1
+      ;;
+    *)
+      args+=("$1")
+      ;;
+  esac
+  shift
+done
+
+if [ -z "$TMUX_PANE" ]; then
+  fzf "${args[@]}"
+  exit $?
+fi
+
+set -e
+
+# Clean up named pipes on exit
+id=$RANDOM
+argsf=/tmp/fzf-args-$id
+fifo1=/tmp/fzf-fifo1-$id
+fifo2=/tmp/fzf-fifo2-$id
+fifo3=/tmp/fzf-fifo3-$id
+cleanup() {
+  rm -f $argsf $fifo1 $fifo2 $fifo3
+}
+trap cleanup EXIT SIGINT SIGTERM
+
+fail() {
+  >&2 echo "$1"
+  exit 1
+}
+fzf="$(which fzf 2> /dev/null)" || fzf="$(dirname "$0")/fzf"
+[ -x "$fzf" ] || fail "fzf executable not found"
+
+envs="env "
+[ -n "$FZF_DEFAULT_OPTS"    ] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
+[ -n "$FZF_DEFAULT_COMMAND" ] && envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"
+
+mkfifo $fifo2
+mkfifo $fifo3
+
+# Build arguments to fzf
+opts=""
+for arg in "${args[@]}"; do
+  opts="$opts \"${arg//\"/\\\"}\""
+done
+
+if [ -n "$term" -o -t 0 ]; then
+  cat <<< "$fzf $opts > $fifo2; echo \$? > $fifo3 $close" > $argsf
+  tmux set-window-option -q synchronize-panes off \;\
+    split-window $opt "cd $(printf %q "$PWD");$envs bash $argsf" $swap
+else
+  mkfifo $fifo1
+  cat <<< "$fzf $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" > $argsf
+  tmux set-window-option -q synchronize-panes off \;\
+    split-window $opt "$envs bash $argsf" $swap
+  cat <&0 > $fifo1 &
+fi
+cat $fifo2
+[ "$(cat $fifo3)" = '0' ]
+

fzf.gemspec

@@ -1,15 +0,0 @@
-# coding: utf-8
-Gem::Specification.new do |spec|
-  spec.name          = 'fzf'
-  spec.version       = '0.1.0'
-  spec.authors       = ['Junegunn Choi']
-  spec.email         = ['junegunn.c@gmail.com']
-  spec.description   = %q{Fuzzy finder for your shell}
-  spec.summary       = %q{Fuzzy finder for your shell}
-  spec.homepage      = 'https://github.com/junegunn/fzf'
-  spec.license       = 'MIT'
-
-  spec.bindir        = '.'
-  spec.files         = %w[fzf.gemspec]
-  spec.executables   = 'fzf'
-end

install

@@ -1,7 +1,277 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-cd `dirname $BASH_SOURCE`
-mkdir -p ~/bin
-ln -sf `pwd`/fzf ~/bin/fzf
-chmod +x ~/bin/fzf
+version=0.10.1
+
+cd $(dirname $BASH_SOURCE)
+fzf_base=$(pwd)
+
+# If stdin is a tty, we are "interactive".
+[ -t 0 ] && interactive=yes
+
+ask() {
+  # non-interactive shell: wait for a linefeed
+  #     interactive shell: continue after a single keypress
+  [ -n "$interactive" ] && read_n='-n 1' || read_n=
+
+  read -p "$1 ([y]/n) " $read_n -r
+  echo
+  [[ ! $REPLY =~ ^[Nn]$ ]]
+}
+
+check_binary() {
+  echo -n "  - Checking fzf executable ... "
+  local output=$("$fzf_base"/bin/fzf --version 2>&1)
+  if [ "$version" = "$output" ]; then
+    echo "$output"
+    binary_error=""
+  else
+    echo "$output != $version"
+    rm -f "$fzf_base"/bin/fzf
+    binary_error="Invalid binary"
+    return 1
+  fi
+}
+
+symlink() {
+  echo "  - Creating symlink: bin/$1 -> bin/fzf"
+  (cd "$fzf_base"/bin &&
+   rm -f fzf &&
+   ln -sf $1 fzf)
+  if [ $? -ne 0 ]; then
+    binary_error="Failed to create symlink"
+    return 1
+  fi
+}
+
+download() {
+  echo "Downloading bin/fzf ..."
+  if [[ ! $1 =~ dev && -x "$fzf_base"/bin/fzf ]]; then
+    echo "  - Already exists"
+    check_binary && return
+  elif [ -x "$fzf_base"/bin/$1 ]; then
+    symlink $1 && check_binary && return
+  fi
+  mkdir -p "$fzf_base"/bin && cd "$fzf_base"/bin
+  if [ $? -ne 0 ]; then
+    binary_error="Failed to create bin directory"
+    return
+  fi
+
+  local url=https://github.com/junegunn/fzf-bin/releases/download/$version/${1}.tgz
+  if which curl > /dev/null; then
+    curl -fL $url | tar -xz
+  elif which wget > /dev/null; then
+    wget -O - $url | tar -xz
+  else
+    binary_error="curl or wget not found"
+    return
+  fi
+
+  if [ ! -f $1 ]; then
+    binary_error="Failed to download ${1}"
+    return
+  fi
+
+  chmod +x $1 && symlink $1 && check_binary
+}
+
+# Try to download binary executable
+archi=$(uname -sm)
+binary_available=1
+binary_error=""
+case "$archi" in
+  Darwin\ x86_64) download fzf-$version-darwin_amd64 ;;
+  Darwin\ i*86)   download fzf-$version-darwin_386   ;;
+  Linux\ x86_64)  download fzf-$version-linux_amd64  ;;
+  Linux\ i*86)    download fzf-$version-linux_386    ;;
+  *)              binary_available=0 binary_error=1  ;;
+esac
+
+cd "$fzf_base"
+if [ -n "$binary_error" ]; then
+  if [ $binary_available -eq 0 ]; then
+    echo "No prebuilt binary for $archi ... "
+  else
+    echo "  - $binary_error !!!"
+  fi
+  echo "Installing legacy Ruby version ..."
+
+  # ruby executable
+  echo -n "Checking Ruby executable ... "
+  ruby=`which ruby`
+  if [ $? -ne 0 ]; then
+    echo "ruby executable not found !!!"
+    exit 1
+  fi
+
+  # System ruby is preferred
+  system_ruby=/usr/bin/ruby
+  if [ -x $system_ruby -a $system_ruby != "$ruby" ]; then
+    $system_ruby --disable-gems -rcurses -e0 2> /dev/null
+    [ $? -eq 0 ] && ruby=$system_ruby
+  fi
+
+  echo "OK ($ruby)"
+
+  # Curses-support
+  echo -n "Checking Curses support ... "
+  "$ruby" -rcurses -e0 2> /dev/null
+  if [ $? -eq 0 ]; then
+    echo "OK"
+  else
+    echo "Not found"
+    echo "Installing 'curses' gem ... "
+    if (( EUID )); then
+      /usr/bin/env gem install curses --user-install
+    else
+      /usr/bin/env gem install curses
+    fi
+    if [ $? -ne 0 ]; then
+      echo
+      echo "Failed to install 'curses' gem."
+      if [[ $(uname -r) =~ 'ARCH' ]]; then
+        echo "Make sure that base-devel package group is installed."
+      fi
+      exit 1
+    fi
+  fi
+
+  # Ruby version
+  echo -n "Checking Ruby version ... "
+  "$ruby" -e 'exit RUBY_VERSION >= "1.9"'
+  if [ $? -eq 0 ]; then
+    echo ">= 1.9"
+    "$ruby" --disable-gems -rcurses -e0 2> /dev/null
+    if [ $? -eq 0 ]; then
+      fzf_cmd="$ruby --disable-gems $fzf_base/fzf"
+    else
+      fzf_cmd="$ruby $fzf_base/fzf"
+    fi
+  else
+    echo "< 1.9"
+    fzf_cmd="$ruby $fzf_base/fzf"
+  fi
+
+  # Create fzf script
+  echo -n "Creating wrapper script for fzf ... "
+  rm -f "$fzf_base"/bin/fzf
+  echo "#!/bin/sh" > "$fzf_base"/bin/fzf
+  echo "$fzf_cmd \"\$@\"" >> "$fzf_base"/bin/fzf
+  chmod +x "$fzf_base"/bin/fzf
+  echo "OK"
+fi
+
+[[ "$*" =~ "--bin" ]] && exit 0
+
+# Auto-completion
+ask "Do you want to add auto-completion support?"
+auto_completion=$?
+
+# Key-bindings
+ask "Do you want to add key bindings?"
+key_bindings=$?
+
+echo
+for shell in bash zsh; do
+  echo -n "Generate ~/.fzf.$shell ... "
+  src=~/.fzf.${shell}
+
+  fzf_completion="[[ \$- =~ i ]] && source \"$fzf_base/shell/completion.${shell}\" 2> /dev/null"
+  if [ $auto_completion -ne 0 ]; then
+    fzf_completion="# $fzf_completion"
+  fi
+
+  fzf_key_bindings="source \"$fzf_base/shell/key-bindings.${shell}\""
+  if [ $key_bindings -ne 0 ]; then
+    fzf_key_bindings="# $fzf_key_bindings"
+  fi
+
+  cat > $src << EOF
+# Setup fzf
+# ---------
+if [[ ! "\$PATH" =~ "$fzf_base/bin" ]]; then
+  export PATH="\$PATH:$fzf_base/bin"
+fi
+
+# Man path
+# --------
+if [[ ! "\$MANPATH" =~ "$fzf_base/man" && -d "$fzf_base/man" ]]; then
+  export MANPATH="\$MANPATH:$fzf_base/man"
+fi
+
+# Auto-completion
+# ---------------
+$fzf_completion
+
+# Key bindings
+# ------------
+$fzf_key_bindings
+
+EOF
+  echo "OK"
+done
+
+# fish
+has_fish=0
+if [ -n "$(which fish 2> /dev/null)" ]; then
+  has_fish=1
+  echo -n "Update fish_user_paths ... "
+  fish << EOF
+  echo \$fish_user_paths | grep $fzf_base/bin > /dev/null
+  or set --universal fish_user_paths \$fish_user_paths $fzf_base/bin
+EOF
+  [ $? -eq 0 ] && echo "OK" || echo "Failed"
+
+  mkdir -p ~/.config/fish/functions
+  if [ -e ~/.config/fish/functions/fzf.fish ]; then
+    echo -n "Remove unnecessary ~/.config/fish/functions/fzf.fish ... "
+    rm -f ~/.config/fish/functions/fzf.fish && echo "OK" || echo "Failed"
+  fi
+
+  if [ $key_bindings -eq 0 ]; then
+    echo -n "Symlink ~/.config/fish/functions/fzf_key_bindings.fish ... "
+    ln -sf $fzf_base/shell/key-bindings.fish \
+           ~/.config/fish/functions/fzf_key_bindings.fish && echo "OK" || echo "Failed"
+  fi
+fi
+
+append_line() {
+  echo "Update $2:"
+  echo "  - $1"
+  [ -f "$2" ] || touch "$2"
+  if [ $# -lt 3 ]; then
+    line=$(\grep -nF "$1" "$2" | sed 's/:.*//' | tr '\n' ' ')
+  else
+    line=$(\grep -nF "$3" "$2" | sed 's/:.*//' | tr '\n' ' ')
+  fi
+  if [ -n "$line" ]; then
+    echo "    - Already exists: line #$line"
+  else
+    echo "$1" >> "$2"
+    echo "    + Added"
+  fi
+  echo
+}
+
+echo
+for shell in bash zsh; do
+  append_line "[ -f ~/.fzf.${shell} ] && source ~/.fzf.${shell}" ~/.${shell}rc "~/.fzf.${shell}"
+done
+
+if [ $key_bindings -eq 0 -a $has_fish -eq 1 ]; then
+  bind_file=~/.config/fish/functions/fish_user_key_bindings.fish
+  append_line "fzf_key_bindings" "$bind_file"
+fi
+
+cat << EOF
+Finished. Restart your shell or reload config file.
+   source ~/.bashrc  # bash
+   source ~/.zshrc   # zsh
+EOF
+[ $has_fish -eq 1 ] && echo "   fzf_key_bindings  # fish"; cat << EOF
+
+Use uninstall script to remove fzf.
+
+For more information, see: https://github.com/junegunn/fzf
+EOF
 

man/man1/fzf.1

@@ -0,0 +1,402 @@
+.ig
+The MIT License (MIT)
+
+Copyright (c) 2015 Junegunn Choi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+..
+.TH fzf 1 "July 2015" "fzf 0.10.1" "fzf - a command-line fuzzy finder"
+
+.SH NAME
+fzf - a command-line fuzzy finder
+
+.SH SYNOPSIS
+fzf [options]
+
+.SH DESCRIPTION
+fzf is a general-purpose command-line fuzzy finder.
+
+.SH OPTIONS
+.SS Search mode
+.TP
+.B "-x, --extended"
+Extended-search mode
+.TP
+.B "-e, --extended-exact"
+Extended-search mode (exact match)
+.TP
+.B "-i"
+Case-insensitive match (default: smart-case match)
+.TP
+.B "+i"
+Case-sensitive match
+.TP
+.BI "-n, --nth=" "N[,..]"
+Comma-separated list of field index expressions for limiting search scope.
+See \fBFIELD INDEX EXPRESSION\fR for details.
+.TP
+.BI "--with-nth=" "N[,..]"
+Transform each item using index expressions within finder
+.TP
+.BI "-d, --delimiter=" "STR"
+Field delimiter regex for \fB--nth\fR and \fB--with-nth\fR (default: AWK-style)
+.SS Search result
+.TP
+.B "+s, --no-sort"
+Do not sort the result
+.TP
+.B "--tac"
+Reverse the order of the input
+.RS
+e.g. \fBhistory | fzf --tac --no-sort\fR
+.RE
+.TP
+.BI "--tiebreak=" "CRI"
+Sort criterion to use when the scores are tied
+.br
+.R ""
+.br
+.BR length "  Prefers item with shorter length"
+.br
+.BR begin "   Prefers item with matched substring closer to the beginning"
+.br
+.BR end "     Prefers item with matched substring closer to the end"
+.br
+.BR index "   Prefers item that appeared earlier in the input stream"
+.br
+.SS Interface
+.TP
+.B "-m, --multi"
+Enable multi-select with tab/shift-tab
+.TP
+.B "--ansi"
+Enable processing of ANSI color codes
+.TP
+.B "--no-mouse"
+Disable mouse
+.TP
+.BI "--color=" "[BASE_SCHEME][,COLOR:ANSI]"
+Color configuration. The name of the base color scheme is followed by custom
+color mappings. Ansi color code of -1 denotes terminal default
+foreground/background color.
+
+.RS
+e.g. \fBfzf --color=bg+:24\fR
+     \fBfzf --color=light,fg:232,bg:255,bg+:116,info:27\fR
+.RE
+
+.RS
+.B BASE SCHEME:
+    (default: dark on 256-color terminal, otherwise 16)
+
+    \fBdark    \fRColor scheme for dark 256-color terminal
+    \fBlight   \fRColor scheme for light 256-color terminal
+    \fB16      \fRColor scheme for 16-color terminal
+    \fBbw      \fRNo colors
+
+.B COLOR:
+    \fBfg      \fRText
+    \fBbg      \fRBackground
+    \fBhl      \fRHighlighted substrings
+    \fBfg+     \fRText (current line)
+    \fBbg+     \fRBackground (current line)
+    \fBhl+     \fRHighlighted substrings (current line)
+    \fBinfo    \fRInfo
+    \fBprompt  \fRPrompt
+    \fBpointer \fRPointer to the current line
+    \fBmarker  \fRMulti-select marker
+    \fBspinner \fRStreaming input indicator
+    \fBheader  \fRHeader
+.RE
+.TP
+.B "--black"
+Use black background
+.TP
+.B "--reverse"
+Reverse orientation
+.TP
+.BI "--margin=" MARGIN
+Comma-separated expression for margins around the finder.
+.br
+.R ""
+.br
+.RS
+.BR TRBL "     Same margin for top, right, bottom, and left"
+.br
+.BR TB,RL "    Vertical, horizontal margin"
+.br
+.BR T,RL,B "   Top, horizontal, bottom margin"
+.br
+.BR T,R,B,L "  Top, right, bottom, left margin"
+.br
+.R ""
+.br
+Each part can be given in absolute number or in percentage relative to the
+terminal size with \fB%\fR suffix.
+.br
+.R ""
+.br
+e.g. \fBfzf --margin 10%\fR
+     \fBfzf --margin 1,5%\fR
+.RE
+.TP
+.B "--cycle"
+Enable cyclic scroll
+.TP
+.B "--no-hscroll"
+Disable horizontal scroll
+.TP
+.B "--inline-info"
+Display finder info inline with the query
+.TP
+.BI "--prompt=" "STR"
+Input prompt (default: '> ')
+.TP
+.BI "--toggle-sort=" "KEY"
+Key to toggle sort. For the list of the allowed key names, see \fB--bind\fR.
+.TP
+.BI "--bind=" "KEYBINDS"
+Comma-separated list of custom key bindings. Each key binding expression
+follows the following format: \fBKEY:ACTION\fR
+.RS
+e.g. \fBfzf --bind=ctrl-j:accept,ctrl-k:kill-line\fR
+.RE
+
+.RS
+.B AVAILABLE KEYS:
+    \fIctrl-[a-z]\fR
+    \fIalt-[a-z]\fR
+    \fIf[1-4]\fR
+    \fIenter\fR       (\fIreturn\fR)
+    \fIspace\fR
+    \fIbspace\fR      (\fIbs\fR)
+    \fIalt-bspace\fR  (\fIalt-bs\fR)
+    \fItab\fR
+    \fIbtab\fR        (\fIshift-tab\fR)
+    \fIesc\fR
+    \fIdel\fR
+    \fIup\fR
+    \fIdown\fR
+    \fIleft\fR
+    \fIright\fR
+    \fIhome\fR
+    \fIend\fR
+    \fIpgup\fR        (\fIpage-up\fR)
+    \fIpgdn\fR        (\fIpage-down\fR)
+    \fIshift-left\fR
+    \fIshift-right\fR
+    or any single character
+.RE
+
+.RS
+  \fBACTION:               DEFAULT BINDINGS:
+    \fBabort\fR                 \fIctrl-c  ctrl-g  ctrl-q  esc\fR
+    \fBaccept\fR                \fIctrl-m  (enter)\fR
+    \fBbackward-char\fR         \fIctrl-b  left\fR
+    \fBbackward-delete-char\fR  \fIctrl-h  bspace\fR
+    \fBbackward-kill-word\fR    \fIalt-bs\fR
+    \fBbackward-word\fR         \fIalt-b   shift-left\fR
+    \fBbeginning-of-line\fR     \fIctrl-a  home\fR
+    \fBcancel\fR
+    \fBclear-screen\fR          \fIctrl-l\fR
+    \fBdelete-char\fR           \fIdel\fR
+    \fBdelete-char/eof\fR       \fIctrl-d\fR
+    \fBdeselect-all\fR
+    \fBdown\fR                  \fIctrl-j  ctrl-n  down\fR
+    \fBend-of-line\fR           \fIctrl-e  end\fR
+    \fBexecute(...)\fR          (see below for the details)
+    \fBforward-char\fR          \fIctrl-f  right\fR
+    \fBforward-word\fR          \fIalt-f   shift-right\fR
+    \fBignore\fR
+    \fBkill-line\fR
+    \fBkill-word\fR             \fIalt-d\fR
+    \fBnext-history\fR          (\fIctrl-n\fR on \fB--history\fR)
+    \fBpage-down\fR             \fIpgdn\fR
+    \fBpage-up\fR               \fIpgup\fR
+    \fBprevious-history\fR      (\fIctrl-p\fR on \fB--history\fR)
+    \fBselect-all\fR
+    \fBtoggle\fR
+    \fBtoggle-all\fR
+    \fBtoggle-down\fR           \fIctrl-i  (tab)\fR
+    \fBtoggle-sort\fR           (equivalent to \fB--toggle-sort\fR)
+    \fBtoggle-up\fR             \fIbtab    (shift-tab)\fR
+    \fBunix-line-discard\fR     \fIctrl-u\fR
+    \fBunix-word-rubout\fR      \fIctrl-w\fR
+    \fBup\fR                    \fIctrl-k  ctrl-p  up\fR
+    \fByank\fR                  \fIctrl-y\fR
+.RE
+
+.RS
+With \fBexecute(...)\fR action, you can execute arbitrary commands without
+leaving fzf. For example, you can turn fzf into a simple file browser by
+binding \fBenter\fR key to \fBless\fR command like follows.
+
+.RS
+\fBfzf --bind "enter:execute(less {})"\fR
+.RE
+
+\fB{}\fR is the placeholder for the double-quoted string of the current line.
+If the command contains parentheses, you can use any of the following
+alternative notations to avoid parse errors.
+
+    \fBexecute[...]\fR
+    \fBexecute~...~\fR
+    \fBexecute!...!\fR
+    \fBexecute@...@\fR
+    \fBexecute#...#\fR
+    \fBexecute$...$\fR
+    \fBexecute%...%\fR
+    \fBexecute^...^\fR
+    \fBexecute&...&\fR
+    \fBexecute*...*\fR
+    \fBexecute;...;\fR
+    \fBexecute/.../\fR
+    \fBexecute|...|\fR
+    \fBexecute:...\fR
+.RS
+This is the special form that frees you from parse errors as it does not expect
+the closing character. The catch is that it should be the last one in the
+comma-separated list.
+.RE
+.RE
+.TP
+.BI "--history=" "HISTORY_FILE"
+Load search history from the specified file and update the file on completion.
+When enabled, \fBCTRL-N\fR and \fBCTRL-P\fR are automatically remapped to
+\fBnext-history\fR and \fBprevious-history\fR.
+.TP
+.BI "--history-size=" "N"
+Maximum number of entries in the history file (default: 1000). The file is
+automatically truncated when the number of the lines exceeds the value.
+.TP
+.BI "--header-file=" "FILE"
+The content of the file will be printed as the sticky header. The lines in the
+file are displayed in order from top to bottom regardless of \fB--reverse\fR,
+and are not affected by \fB--with-nth\fR. ANSI color codes are processed even
+when \fB--ansi\fR is not set.
+.TP
+.BI "--header-lines=" "N"
+The first N lines of the input are treated as the sticky header. When
+\fB--with-nth\fR is set, the lines are transformed just like the other
+lines that follow.
+.SS Scripting
+.TP
+.BI "-q, --query=" "STR"
+Start the finder with the given query
+.TP
+.B "-1, --select-1"
+Automatically select the only match
+.TP
+.B "-0, --exit-0"
+Exit immediately when there's no match
+.TP
+.BI "-f, --filter=" "STR"
+Filter mode. Do not start interactive finder. When used with \fB--no-sort\fR,
+fzf becomes a fuzzy-version of grep.
+.TP
+.B "--print-query"
+Print query as the first line
+.TP
+.BI "--expect=" "KEY[,..]"
+Comma-separated list of keys that can be used to complete fzf in addition to
+the default enter key. When this option is set, fzf will print the name of the
+key pressed as the first line of its output (or as the second line if
+\fB--print-query\fR is also used). The line will be empty if fzf is completed
+with the default enter key.
+.RS
+e.g. \fBfzf --expect=ctrl-v,ctrl-t,alt-s,f1,f2,~,@\fR
+.RE
+.TP
+.B "--sync"
+Synchronous search for multi-staged filtering. If specified, fzf will launch
+ncurses finder only after the input stream is complete.
+.RS
+e.g. \fBfzf --multi | fzf --sync\fR
+.RE
+
+.SH ENVIRONMENT
+.TP
+.B FZF_DEFAULT_COMMAND
+Default command to use when input is tty
+.TP
+.B FZF_DEFAULT_OPTS
+Default options. e.g. \fBexport FZF_DEFAULT_OPTS="--extended --cycle"\fR
+
+.SH EXIT STATUS
+.BR 0 "      Normal exit"
+.br
+.BR 1 "      Interrupted with \fBCTRL-C\fR or \fBESC\fR"
+
+.SH FIELD INDEX EXPRESSION
+
+A field index expression can be a non-zero integer or a range expression
+([BEGIN]..[END]). \fB--nth\fR and \fB--with-nth\fR take a comma-separated list
+of field index expressions.
+
+.SS Examples
+.BR 1 "      The 1st field"
+.br
+.BR 2 "      The 2nd field"
+.br
+.BR -1 "     The last field"
+.br
+.BR -2 "     The 2nd to last field"
+.br
+.BR 3..5 "   From the 3rd field to the 5th field"
+.br
+.BR 2.. "    From the 2nd field to the last field"
+.br
+.BR ..-3 "   From the 1st field to the 3rd to the last field"
+.br
+.BR .. "     All the fields"
+.br
+
+.SH EXTENDED SEARCH MODE
+
+With \fB-x\fR or \fB--extended\fR option, fzf will start in "extended-search
+mode". In this mode, you can specify multiple patterns delimited by spaces,
+such as: \fB'wild ^music .mp3$ sbtrkt !rmx\fR
+
+.SS Exact-match (quoted)
+A term that is prefixed by a single-quote character (') is interpreted as an
+"exact-match" (or "non-fuzzy") term. fzf will search for the exact occurrences
+of the string.
+
+.SS Anchored-match
+A term can be prefixed by ^, or suffixed by $ to become an anchored-match term.
+Then fzf will search for the items that start with or end with the given
+string. An anchored-match term is also an exact-match term.
+
+.SS Negation
+If a term is prefixed by !, fzf will exclude the items that satisfy the term
+from the result.
+
+.SS Extended-exact mode
+If you don't need fuzzy matching at all and do not wish to "quote" (prefixing
+with ') every word, start fzf with \fB-e\fR or \fB--extended-exact\fR option
+(instead of \fB-x\fR or \fB--extended\fR).
+
+.SH AUTHOR
+Junegunn Choi (\fIjunegunn.c@gmail.com\fR)
+
+.SH SEE ALSO
+.I https://github.com/junegunn/fzf
+
+.SH LICENSE
+MIT

plugin/fzf.vim

@@ -1,4 +1,4 @@
-" Copyright (c) 2013 Junegunn Choi
+" Copyright (c) 2015 Junegunn Choi
 "
 " MIT License
 "
@@ -21,21 +21,369 @@
 " OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 " WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-let s:exec = expand('<sfile>:h:h').'/fzf'
+let s:default_height = '40%'
+let s:fzf_go = expand('<sfile>:h:h').'/bin/fzf'
+let s:install = expand('<sfile>:h:h').'/install'
+let s:installed = 0
+let s:fzf_tmux = expand('<sfile>:h:h').'/bin/fzf-tmux'
 
-function! s:fzf(args)
+let s:cpo_save = &cpo
+set cpo&vim
+
+function! s:fzf_exec()
+  if !exists('s:exec')
+    if executable(s:fzf_go)
+      let s:exec = s:fzf_go
+    elseif executable('fzf')
+      let s:exec = 'fzf'
+    elseif !s:installed && executable(s:install) &&
+          \ input('fzf executable not found. Download binary? (y/n) ') =~? '^y'
+      redraw
+      echo
+      echohl WarningMsg
+      echo 'Downloading fzf binary. Please wait ...'
+      echohl None
+      let s:installed = 1
+      call system(s:install.' --bin')
+      return s:fzf_exec()
+    else
+      redraw
+      throw 'fzf executable not found'
+    endif
+  endif
+  return s:exec
+endfunction
+
+function! s:tmux_enabled()
+  if has('gui_running')
+    return 0
+  endif
+
+  if exists('s:tmux')
+    return s:tmux
+  endif
+
+  let s:tmux = 0
+  if exists('$TMUX') && executable(s:fzf_tmux)
+    let output = system('tmux -V')
+    let s:tmux = !v:shell_error && output >= 'tmux 1.7'
+  endif
+  return s:tmux
+endfunction
+
+function! s:shellesc(arg)
+  return '"'.substitute(a:arg, '"', '\\"', 'g').'"'
+endfunction
+
+function! s:escape(path)
+  return escape(a:path, ' %#\')
+endfunction
+
+" Upgrade legacy options
+function! s:upgrade(dict)
+  let copy = copy(a:dict)
+  if has_key(copy, 'tmux')
+    let copy.down = remove(copy, 'tmux')
+  endif
+  if has_key(copy, 'tmux_height')
+    let copy.down = remove(copy, 'tmux_height')
+  endif
+  if has_key(copy, 'tmux_width')
+    let copy.right = remove(copy, 'tmux_width')
+  endif
+  return copy
+endfunction
+
+function! fzf#run(...) abort
+try
+  let oshell = &shell
+  set shell=sh
+  if has('nvim') && bufexists('term://*:FZF')
+    echohl WarningMsg
+    echomsg 'FZF is already running!'
+    echohl None
+    return []
+  endif
+  let dict   = exists('a:1') ? s:upgrade(a:1) : {}
+  let temps  = { 'result': tempname() }
+  let optstr = get(dict, 'options', '')
   try
-    let tf = tempname()
-    let prefix = exists('g:fzf_command') ? g:fzf_command.'|' : ''
-    execute "silent !".prefix."/usr/bin/env ruby ".s:exec." ".a:args." > ".tf
-    if !v:shell_error
-      execute 'silent e '.join(readfile(tf), '')
+    let fzf_exec = s:fzf_exec()
+  catch
+    throw v:exception
+  endtry
+
+  if has_key(dict, 'source')
+    let source = dict.source
+    let type = type(source)
+    if type == 1
+      let prefix = source.'|'
+    elseif type == 3
+      let temps.input = tempname()
+      call writefile(source, temps.input)
+      let prefix = 'cat '.s:shellesc(temps.input).'|'
+    else
+      throw 'Invalid source type'
+    endif
+  else
+    let prefix = ''
+  endif
+  let tmux = !has('nvim') && s:tmux_enabled() && s:splittable(dict)
+  let command = prefix.(tmux ? s:fzf_tmux(dict) : fzf_exec).' '.optstr.' > '.temps.result
+
+  try
+    if tmux
+      return s:execute_tmux(dict, command, temps)
+    elseif has('nvim')
+      return s:execute_term(dict, command, temps)
+    else
+      return s:execute(dict, command, temps)
     endif
   finally
-    silent! call delete(tf)
-    redraw!
+    call s:popd(dict)
+  endtry
+finally
+  let &shell = oshell
+endtry
+endfunction
+
+function! s:present(dict, ...)
+  for key in a:000
+    if !empty(get(a:dict, key, ''))
+      return 1
+    endif
+  endfor
+  return 0
+endfunction
+
+function! s:fzf_tmux(dict)
+  let size = ''
+  for o in ['up', 'down', 'left', 'right']
+    if s:present(a:dict, o)
+      let size = '-'.o[0].(a:dict[o] == 1 ? '' : a:dict[o])
+      break
+    endif
+  endfor
+  return printf('LINES=%d COLUMNS=%d %s %s %s --',
+    \ &lines, &columns, s:fzf_tmux, size, (has_key(a:dict, 'source') ? '' : '-'))
+endfunction
+
+function! s:splittable(dict)
+  return s:present(a:dict, 'up', 'down', 'left', 'right')
+endfunction
+
+function! s:pushd(dict)
+  if s:present(a:dict, 'dir')
+    let cwd = getcwd()
+    if get(a:dict, 'prev_dir', '') ==# cwd
+      return 1
+    endif
+    let a:dict.prev_dir = cwd
+    execute 'chdir '.s:escape(a:dict.dir)
+    let a:dict.dir = getcwd()
+    return 1
+  endif
+  return 0
+endfunction
+
+function! s:popd(dict)
+  if has_key(a:dict, 'prev_dir')
+    execute 'chdir '.s:escape(remove(a:dict, 'prev_dir'))
+  endif
+endfunction
+
+function! s:xterm_launcher()
+  let fmt = 'xterm -T "[fzf]" -bg "\%s" -fg "\%s" -geometry %dx%d+%d+%d -e bash -ic %%s'
+  if has('gui_macvim')
+    let fmt .= '; osascript -e "tell application \"MacVim\" to activate"'
+  endif
+  return printf(fmt,
+    \ synIDattr(hlID("Normal"), "bg"), synIDattr(hlID("Normal"), "fg"),
+    \ &columns, &lines/2, getwinposx(), getwinposy())
+endfunction
+unlet! s:launcher
+let s:launcher = function('s:xterm_launcher')
+
+function! s:execute(dict, command, temps)
+  call s:pushd(a:dict)
+  silent! !clear 2> /dev/null
+  if has('gui_running')
+    let Launcher = get(a:dict, 'launcher', get(g:, 'Fzf_launcher', get(g:, 'fzf_launcher', s:launcher)))
+    let fmt = type(Launcher) == 2 ? call(Launcher, []) : Launcher
+    let command = printf(fmt, "'".substitute(a:command, "'", "'\"'\"'", 'g')."'")
+  else
+    let command = a:command
+  endif
+  execute 'silent !'.command
+  redraw!
+  if v:shell_error
+    " Do not print error message on exit status 1
+    if v:shell_error > 1
+      echohl ErrorMsg
+      echo 'Error running ' . command
+    endif
+    return []
+  else
+    return s:callback(a:dict, a:temps)
+  endif
+endfunction
+
+function! s:execute_tmux(dict, command, temps)
+  let command = a:command
+  if s:pushd(a:dict)
+    " -c '#{pane_current_path}' is only available on tmux 1.9 or above
+    let command = 'cd '.s:escape(a:dict.dir).' && '.command
+  endif
+
+  call system(command)
+  redraw!
+  return s:callback(a:dict, a:temps)
+endfunction
+
+function! s:calc_size(max, val)
+  if a:val =~ '%$'
+    return a:max * str2nr(a:val[:-2]) / 100
+  else
+    return min([a:max, a:val])
+  endif
+endfunction
+
+function! s:getpos()
+  return {'tab': tabpagenr(), 'win': winnr(), 'cnt': winnr('$')}
+endfunction
+
+function! s:split(dict)
+  let directions = {
+  \ 'up':    ['topleft', 'resize', &lines],
+  \ 'down':  ['botright', 'resize', &lines],
+  \ 'left':  ['vertical topleft', 'vertical resize', &columns],
+  \ 'right': ['vertical botright', 'vertical resize', &columns] }
+  let s:ppos = s:getpos()
+  try
+    for [dir, triple] in items(directions)
+      let val = get(a:dict, dir, '')
+      if !empty(val)
+        let [cmd, resz, max] = triple
+        let sz = s:calc_size(max, val)
+        execute cmd sz.'new'
+        execute resz sz
+        return
+      endif
+    endfor
+    if s:present(a:dict, 'window')
+      execute a:dict.window
+    else
+      tabnew
+    endif
+  finally
+    setlocal winfixwidth winfixheight buftype=nofile bufhidden=wipe nobuflisted
   endtry
 endfunction
 
-command! -nargs=* FZF call s:fzf(<q-args>)
+function! s:execute_term(dict, command, temps)
+  call s:split(a:dict)
+  call s:pushd(a:dict)
+
+  let fzf = { 'buf': bufnr('%'), 'dict': a:dict, 'temps': a:temps, 'name': 'FZF' }
+  function! fzf.on_exit(id, code)
+    let pos = s:getpos()
+    let inplace = pos == s:ppos " {'window': 'enew'}
+    if !inplace
+      if bufnr('') == self.buf
+        " We use close instead of bd! since Vim does not close the split when
+        " there's no other listed buffer (nvim +'set nobuflisted')
+        close
+      endif
+      if pos.tab == s:ppos.tab
+        wincmd p
+      endif
+    endif
+    call s:pushd(self.dict)
+    try
+      redraw!
+      call s:callback(self.dict, self.temps)
+
+      if inplace && bufnr('') == self.buf
+        execute "normal! \<c-^>"
+        " No other listed buffer
+        if bufnr('') == self.buf
+          bd!
+        endif
+      endif
+    finally
+      call s:popd(self.dict)
+    endtry
+  endfunction
+
+  call termopen(a:command, fzf)
+  startinsert
+  return []
+endfunction
+
+function! s:callback(dict, temps)
+try
+  if !filereadable(a:temps.result)
+    let lines = []
+  else
+    let lines = readfile(a:temps.result)
+    if has_key(a:dict, 'sink')
+      for line in lines
+        if type(a:dict.sink) == 2
+          call a:dict.sink(line)
+        else
+          execute a:dict.sink s:escape(line)
+        endif
+      endfor
+    endif
+    if has_key(a:dict, 'sink*')
+      call a:dict['sink*'](lines)
+    endif
+  endif
+
+  for tf in values(a:temps)
+    silent! call delete(tf)
+  endfor
+
+  return lines
+catch
+  if stridx(v:exception, ':E325:') < 0
+    echoerr v:exception
+  endif
+endtry
+endfunction
+
+let s:default_action = {
+  \ 'ctrl-m': 'e',
+  \ 'ctrl-t': 'tabedit',
+  \ 'ctrl-x': 'split',
+  \ 'ctrl-v': 'vsplit' }
+
+function! s:cmd_callback(lines) abort
+  if empty(a:lines)
+    return
+  endif
+  let key = remove(a:lines, 0)
+  let cmd = get(s:action, key, 'e')
+  for item in a:lines
+    execute cmd s:escape(item)
+  endfor
+endfunction
+
+function! s:cmd(bang, ...) abort
+  let s:action = get(g:, 'fzf_action', s:default_action)
+  let args = extend(['--expect='.join(keys(s:action), ',')], a:000)
+  let opts = {}
+  if len(args) > 0 && isdirectory(expand(args[-1]))
+    let opts.dir = remove(args, -1)
+  endif
+  if !a:bang
+    let opts.down = get(g:, 'fzf_height', get(g:, 'fzf_tmux_height', s:default_height))
+  endif
+  call fzf#run(extend({'options': join(args), 'sink*': function('<sid>cmd_callback')}, opts))
+endfunction
+
+command! -nargs=* -complete=dir -bang FZF call s:cmd(<bang>0, <f-args>)
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
 

shell/completion.bash

@@ -0,0 +1,275 @@
+#!/bin/bash
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/-completion.bash
+#
+# - $FZF_TMUX               (default: 1)
+# - $FZF_TMUX_HEIGHT        (default: '40%')
+# - $FZF_COMPLETION_TRIGGER (default: '**')
+# - $FZF_COMPLETION_OPTS    (default: empty)
+
+_fzf_orig_completion_filter() {
+  sed 's/.*-F *\([^ ]*\).* \([^ ]*\)$/export _fzf_orig_completion_\2=\1;/' |
+  sed 's/[^a-z0-9_= ;]/_/g'
+}
+
+_fzf_opts_completion() {
+  local cur prev opts
+  COMPREPLY=()
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  prev="${COMP_WORDS[COMP_CWORD-1]}"
+  opts="
+    -x --extended
+    -e --extended-exact
+    -i +i
+    -n --nth
+    -d --delimiter
+    +s --no-sort
+    --tac
+    --tiebreak
+    --bind
+    -m --multi
+    --no-mouse
+    --color
+    --black
+    --reverse
+    --no-hscroll
+    --inline-info
+    --prompt
+    -q --query
+    -1 --select-1
+    -0 --exit-0
+    -f --filter
+    --print-query
+    --expect
+    --toggle-sort
+    --sync
+    --cycle
+    --history
+    --history-size
+    --header-file
+    --header-lines
+    --margin"
+
+  case "${prev}" in
+  --tiebreak)
+    COMPREPLY=( $(compgen -W "length begin end index" -- ${cur}) )
+    return 0
+    ;;
+  --color)
+    COMPREPLY=( $(compgen -W "dark light 16 bw" -- ${cur}) )
+    return 0
+    ;;
+  --history|--header-file)
+    COMPREPLY=()
+    return 0
+    ;;
+  esac
+
+  if [[ ${cur} =~ ^-|\+ ]]; then
+    COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+    return 0
+  fi
+
+  return 0
+}
+
+_fzf_handle_dynamic_completion() {
+  local cmd orig ret orig_cmd
+  cmd="$1"
+  shift
+  orig_cmd="$1"
+
+  orig=$(eval "echo \$_fzf_orig_completion_$cmd")
+  if [ -n "$orig" ] && type "$orig" > /dev/null 2>&1; then
+    $orig "$@"
+  elif [ -n "$_fzf_completion_loader" ]; then
+    _completion_loader "$@"
+    ret=$?
+    eval $(complete | \grep "\-F.* $orig_cmd$" | _fzf_orig_completion_filter)
+    source $BASH_SOURCE
+    return $ret
+  fi
+}
+
+_fzf_path_completion() {
+  local cur base dir leftover matches trigger cmd fzf
+  [ ${FZF_TMUX:-1} -eq 1 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
+  cmd=$(echo ${COMP_WORDS[0]} | sed 's/[^a-z0-9_=]/_/g')
+  COMPREPLY=()
+  trigger=${FZF_COMPLETION_TRIGGER-'**'}
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  if [[ ${cur} == *"$trigger" ]]; then
+    base=${cur:0:${#cur}-${#trigger}}
+    eval base=$base
+
+    dir="$base"
+    while [ 1 ]; do
+      if [ -z "$dir" -o -d "$dir" ]; then
+        leftover=${base/#"$dir"}
+        leftover=${leftover/#\/}
+        [ "$dir" = './' ] && dir=''
+        tput sc
+        matches=$(find -L "$dir"* $1 2> /dev/null | $fzf $FZF_COMPLETION_OPTS $2 -q "$leftover" | while read item; do
+          printf "%q$3 " "$item"
+        done)
+        matches=${matches% }
+        if [ -n "$matches" ]; then
+          COMPREPLY=( "$matches" )
+        else
+          COMPREPLY=( "$cur" )
+        fi
+        tput rc
+        return 0
+      fi
+      dir=$(dirname "$dir")
+      [[ "$dir" =~ /$ ]] || dir="$dir"/
+    done
+  else
+    shift
+    shift
+    shift
+    _fzf_handle_dynamic_completion "$cmd" "$@"
+  fi
+}
+
+_fzf_list_completion() {
+  local cur selected trigger cmd src fzf
+  [ ${FZF_TMUX:-1} -eq 1 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
+  read -r src
+  cmd=$(echo ${COMP_WORDS[0]} | sed 's/[^a-z0-9_=]/_/g')
+  trigger=${FZF_COMPLETION_TRIGGER-'**'}
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  if [[ ${cur} == *"$trigger" ]]; then
+    cur=${cur:0:${#cur}-${#trigger}}
+
+    tput sc
+    selected=$(eval "$src | $fzf $FZF_COMPLETION_OPTS $1 -q '$cur'" | tr '\n' ' ')
+    selected=${selected% }
+    tput rc
+
+    if [ -n "$selected" ]; then
+      COMPREPLY=("$selected")
+      return 0
+    fi
+  else
+    shift
+    _fzf_handle_dynamic_completion "$cmd" "$@"
+  fi
+}
+
+_fzf_all_completion() {
+  _fzf_path_completion \
+    "-name .git -prune -o -name .svn -prune -o -type d -print -o -type f -print -o -type l -print" \
+    "-m" "" "$@"
+}
+
+_fzf_file_completion() {
+  _fzf_path_completion \
+    "-name .git -prune -o -name .svn -prune -o -type f -print -o -type l -print" \
+    "-m" "" "$@"
+}
+
+_fzf_dir_completion() {
+  _fzf_path_completion \
+    "-name .git -prune -o -name .svn -prune -o -type d -print" \
+    "" "/" "$@"
+}
+
+_fzf_kill_completion() {
+  [ -n "${COMP_WORDS[COMP_CWORD]}" ] && return 1
+
+  local selected fzf
+  [ ${FZF_TMUX:-1} -eq 1 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
+  tput sc
+  selected=$(ps -ef | sed 1d | $fzf -m $FZF_COMPLETION_OPTS | awk '{print $2}' | tr '\n' ' ')
+  tput rc
+
+  if [ -n "$selected" ]; then
+    COMPREPLY=( "$selected" )
+    return 0
+  fi
+}
+
+_fzf_telnet_completion() {
+  _fzf_list_completion '+m' "$@" << "EOF"
+  \grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0' | awk '{if (length($2) > 0) {print $2}}' | sort -u
+EOF
+}
+
+_fzf_ssh_completion() {
+  _fzf_list_completion '+m' "$@" << "EOF"
+    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | \grep -i '^host' | \grep -v '*') <(\grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0') | awk '{if (length($2) > 0) {print $2}}' | sort -u
+EOF
+}
+
+_fzf_env_var_completion() {
+  _fzf_list_completion '-m' "$@" << "EOF"
+  declare -xp | sed 's/=.*//' | sed 's/.* //'
+EOF
+}
+
+_fzf_alias_completion() {
+  _fzf_list_completion '-m' "$@" << "EOF"
+  alias | sed 's/=.*//' | sed 's/.* //'
+EOF
+}
+
+# fzf options
+complete -o default -F _fzf_opts_completion fzf
+
+d_cmds="cd pushd rmdir"
+f_cmds="
+  awk cat diff diff3
+  emacs ex file ftp g++ gcc gvim head hg java
+  javac ld less more mvim patch perl python ruby
+  sed sftp sort source tail tee uniq vi view vim wc"
+a_cmds="
+  basename bunzip2 bzip2 chmod chown curl cp dirname du
+  find git grep gunzip gzip hg jar
+  ln ls mv open rm rsync scp
+  svn tar unzip zip"
+x_cmds="kill ssh telnet unset unalias export"
+
+# Preserve existing completion
+if [ "$_fzf_completion_loaded" != '0.9.12' ]; then
+  # Really wish I could use associative array but OSX comes with bash 3.2 :(
+  eval $(complete | \grep '\-F' | \grep -v _fzf_ |
+    \grep -E " ($(echo $d_cmds $f_cmds $a_cmds $x_cmds | sed 's/ /|/g' | sed 's/+/\\+/g'))$" | _fzf_orig_completion_filter)
+  export _fzf_completion_loaded=0.9.12
+fi
+
+if type _completion_loader > /dev/null 2>&1; then
+  _fzf_completion_loader=1
+fi
+
+# Directory
+for cmd in $d_cmds; do
+  complete -F _fzf_dir_completion -o nospace -o plusdirs $cmd
+done
+
+# File
+for cmd in $f_cmds; do
+  complete -F _fzf_file_completion -o default -o bashdefault $cmd
+done
+
+# Anything
+for cmd in $a_cmds; do
+  complete -F _fzf_all_completion -o default -o bashdefault $cmd
+done
+
+# Kill completion
+complete -F _fzf_kill_completion -o nospace -o default -o bashdefault kill
+
+# Host completion
+complete -F _fzf_ssh_completion -o default -o bashdefault ssh
+complete -F _fzf_telnet_completion -o default -o bashdefault telnet
+
+# Environment variables / Aliases
+complete -F _fzf_env_var_completion -o default -o bashdefault unset
+complete -F _fzf_env_var_completion -o default -o bashdefault export
+complete -F _fzf_alias_completion -o default -o bashdefault unalias
+
+unset cmd d_cmds f_cmds a_cmds x_cmds

shell/completion.zsh

@@ -0,0 +1,158 @@
+#!/bin/zsh
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/-completion.zsh
+#
+# - $FZF_TMUX               (default: 1)
+# - $FZF_TMUX_HEIGHT        (default: '40%')
+# - $FZF_COMPLETION_TRIGGER (default: '**')
+# - $FZF_COMPLETION_OPTS    (default: empty)
+
+_fzf_path_completion() {
+  local base lbuf find_opts fzf_opts suffix tail fzf dir leftover matches nnm
+  base=${(Q)1}
+  lbuf=$2
+  find_opts=$3
+  fzf_opts=$4
+  suffix=$5
+  tail=$6
+  [ ${FZF_TMUX:-1} -eq 1 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
+
+  if ! setopt | grep nonomatch > /dev/null; then
+    nnm=1
+    setopt nonomatch
+  fi
+  dir="$base"
+  while [ 1 ]; do
+    if [ -z "$dir" -o -d ${~dir} ]; then
+      leftover=${base/#"$dir"}
+      leftover=${leftover/#\/}
+      [ "$dir" = './' ] && dir=''
+      dir=${~dir}
+      matches=$(\find -L $dir* ${=find_opts} 2> /dev/null | ${=fzf} ${=FZF_COMPLETION_OPTS} ${=fzf_opts} -q "$leftover" | while read item; do
+        printf "%q$suffix " "$item"
+      done)
+      matches=${matches% }
+      if [ -n "$matches" ]; then
+        LBUFFER="$lbuf$matches$tail"
+      fi
+      zle redisplay
+      break
+    fi
+    dir=$(dirname "$dir")
+    dir=${dir%/}/
+  done
+  [ -n "$nnm" ] && unsetopt nonomatch
+}
+
+_fzf_all_completion() {
+  _fzf_path_completion "$1" "$2" \
+    "-name .git -prune -o -name .svn -prune -o -type d -print -o -type f -print -o -type l -print" \
+    "-m" "" " "
+}
+
+_fzf_dir_completion() {
+  _fzf_path_completion "$1" "$2" \
+    "-name .git -prune -o -name .svn -prune -o -type d -print" \
+    "" "/" ""
+}
+
+_fzf_list_completion() {
+  local prefix lbuf fzf_opts src fzf matches
+  prefix=$1
+  lbuf=$2
+  fzf_opts=$3
+  read -r src
+  [ ${FZF_TMUX:-1} -eq 1 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
+
+  matches=$(eval "$src" | ${=fzf} ${=FZF_COMPLETION_OPTS} ${=fzf_opts} -q "$prefix")
+  if [ -n "$matches" ]; then
+    LBUFFER="$lbuf$matches "
+  fi
+  zle redisplay
+}
+
+_fzf_telnet_completion() {
+  _fzf_list_completion "$1" "$2" '+m' << "EOF"
+  \grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0' | awk '{if (length($2) > 0) {print $2}}' | sort -u
+EOF
+}
+
+_fzf_ssh_completion() {
+  _fzf_list_completion "$1" "$2" '+m' << "EOF"
+    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | \grep -i '^host' | \grep -v '*') <(\grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0') | awk '{if (length($2) > 0) {print $2}}' | sort -u
+EOF
+}
+
+_fzf_env_var_completion() {
+  _fzf_list_completion "$1" "$2" '+m' << "EOF"
+  declare -xp | sed 's/=.*//' | sed 's/.* //'
+EOF
+}
+
+_fzf_alias_completion() {
+  _fzf_list_completion "$1" "$2" '+m' << "EOF"
+  alias | sed 's/=.*//'
+EOF
+}
+
+fzf-completion() {
+  local tokens cmd prefix trigger tail fzf matches lbuf d_cmds
+
+  # http://zsh.sourceforge.net/FAQ/zshfaq03.html
+  # http://zsh.sourceforge.net/Doc/Release/Expansion.html#Parameter-Expansion-Flags
+  tokens=(${(z)LBUFFER})
+  if [ ${#tokens} -lt 1 ]; then
+    eval "zle ${fzf_default_completion:-expand-or-complete}"
+    return
+  fi
+
+  cmd=${tokens[1]}
+
+  # Explicitly allow for empty trigger.
+  trigger=${FZF_COMPLETION_TRIGGER-'**'}
+  [ -z "$trigger" -a ${LBUFFER[-1]} = ' ' ] && tokens+=("")
+
+  tail=${LBUFFER:$(( ${#LBUFFER} - ${#trigger} ))}
+  # Kill completion (do not require trigger sequence)
+  if [ $cmd = kill -a ${LBUFFER[-1]} = ' ' ]; then
+    [ ${FZF_TMUX:-1} -eq 1 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
+    matches=$(ps -ef | sed 1d | ${=fzf} ${=FZF_COMPLETION_OPTS} -m | awk '{print $2}' | tr '\n' ' ')
+    if [ -n "$matches" ]; then
+      LBUFFER="$LBUFFER$matches"
+    fi
+    zle redisplay
+  # Trigger sequence given
+  elif [ ${#tokens} -gt 1 -a "$tail" = "$trigger" ]; then
+    d_cmds=(cd pushd rmdir)
+
+    [ -z "$trigger"      ] && prefix=${tokens[-1]} || prefix=${tokens[-1]:0:-${#trigger}}
+    [ -z "${tokens[-1]}" ] && lbuf=$LBUFFER        || lbuf=${LBUFFER:0:-${#tokens[-1]}}
+
+    if [ ${d_cmds[(i)$cmd]} -le ${#d_cmds} ]; then
+      _fzf_dir_completion "$prefix" $lbuf
+    elif [ $cmd = telnet ]; then
+      _fzf_telnet_completion "$prefix" $lbuf
+    elif [ $cmd = ssh ]; then
+      _fzf_ssh_completion "$prefix" $lbuf
+    elif [ $cmd = unset -o $cmd = export ]; then
+      _fzf_env_var_completion "$prefix" $lbuf
+    elif [ $cmd = unalias ]; then
+      _fzf_alias_completion "$prefix" $lbuf
+    else
+      _fzf_all_completion "$prefix" $lbuf
+    fi
+  # Fall back to default completion
+  else
+    eval "zle ${fzf_default_completion:-expand-or-complete}"
+  fi
+}
+
+[ -z "$fzf_default_completion" ] &&
+  fzf_default_completion=$(bindkey '^I' | grep -v undefined-key | awk '{print $2}')
+
+zle     -N   fzf-completion
+bindkey '^I' fzf-completion
+

shell/key-bindings.bash

@@ -0,0 +1,96 @@
+# Key bindings
+# ------------
+__fzf_select__() {
+  local cmd="${FZF_CTRL_T_COMMAND:-"command \\find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
+    -o -type f -print \
+    -o -type d -print \
+    -o -type l -print 2> /dev/null | sed 1d | cut -b3-"}"
+  eval "$cmd" | fzf -m | while read item; do
+    printf '%q ' "$item"
+  done
+  echo
+}
+
+if [[ $- =~ i ]]; then
+
+__fzfcmd() {
+  [ ${FZF_TMUX:-1} -eq 1 ] && echo "fzf-tmux -d${FZF_TMUX_HEIGHT:-40%}" || echo "fzf"
+}
+
+__fzf_select_tmux__() {
+  local height
+  height=${FZF_TMUX_HEIGHT:-40%}
+  if [[ $height =~ %$ ]]; then
+    height="-p ${height%\%}"
+  else
+    height="-l $height"
+  fi
+  tmux split-window $height "cd $(printf %q "$PWD"); FZF_CTRL_T_COMMAND=$(printf %q "$FZF_CTRL_T_COMMAND") bash -c 'source ~/.fzf.bash; tmux send-keys -t $TMUX_PANE \"\$(__fzf_select__)\"'"
+}
+
+__fzf_cd__() {
+  local dir
+  dir=$(command \find -L ${1:-.} \( -path '*/\.*' -o -fstype 'dev' -o -fstype 'proc' \) -prune \
+    -o -type d -print 2> /dev/null | sed 1d | cut -b3- | $(__fzfcmd) +m) && printf 'cd %q' "$dir"
+}
+
+__fzf_history__() (
+  local line
+  shopt -u nocaseglob nocasematch
+  line=$(
+    HISTTIMEFORMAT= history |
+    $(__fzfcmd) +s --tac +m -n2..,.. --tiebreak=index --toggle-sort=ctrl-r |
+    \grep '^ *[0-9]') &&
+    if [[ $- =~ H ]]; then
+      sed 's/^ *\([0-9]*\)\** .*/!\1/' <<< "$line"
+    else
+      sed 's/^ *\([0-9]*\)\** *//' <<< "$line"
+    fi
+)
+
+__use_tmux=0
+[ -n "$TMUX_PANE" -a ${FZF_TMUX:-1} -ne 0 -a ${LINES:-40} -gt 15 ] && __use_tmux=1
+
+if [ -z "$(set -o | \grep '^vi.*on')" ]; then
+  # Required to refresh the prompt after fzf
+  bind '"\er": redraw-current-line'
+  bind '"\e^": history-expand-line'
+
+  # CTRL-T - Paste the selected file path into the command line
+  if [ $__use_tmux -eq 1 ]; then
+    bind '"\C-t": " \C-u \C-a\C-k$(__fzf_select_tmux__)\e\C-e\C-y\C-a\C-d\C-y\ey\C-h"'
+  else
+    bind '"\C-t": " \C-u \C-a\C-k$(__fzf_select__)\e\C-e\C-y\C-a\C-y\ey\C-h\C-e\er \C-h"'
+  fi
+
+  # CTRL-R - Paste the selected command from history into the command line
+  bind '"\C-r": " \C-e\C-u$(__fzf_history__)\e\C-e\e^\er"'
+
+  # ALT-C - cd into the selected directory
+  bind '"\ec": " \C-e\C-u$(__fzf_cd__)\e\C-e\er\C-m"'
+else
+  bind '"\C-x\C-e": shell-expand-line'
+  bind '"\C-x\C-r": redraw-current-line'
+  bind '"\C-x^": history-expand-line'
+
+  # CTRL-T - Paste the selected file path into the command line
+  # - FIXME: Selected items are attached to the end regardless of cursor position
+  if [ $__use_tmux -eq 1 ]; then
+    bind '"\C-t": "\e$a \eddi$(__fzf_select_tmux__)\C-x\C-e\e0P$xa"'
+  else
+    bind '"\C-t": "\e$a \eddi$(__fzf_select__)\C-x\C-e\e0Px$a \C-x\C-r\exa "'
+  fi
+  bind -m vi-command '"\C-t": "i\C-t"'
+
+  # CTRL-R - Paste the selected command from history into the command line
+  bind '"\C-r": "\eddi$(__fzf_history__)\C-x\C-e\C-x^\e$a\C-x\C-r"'
+  bind -m vi-command '"\C-r": "i\C-r"'
+
+  # ALT-C - cd into the selected directory
+  bind '"\ec": "\eddi$(__fzf_cd__)\C-x\C-e\C-x\C-r\C-m"'
+  bind -m vi-command '"\ec": "i\ec"'
+fi
+
+unset __use_tmux
+
+fi

shell/key-bindings.fish

@@ -0,0 +1,69 @@
+# Key bindings
+# ------------
+function fzf_key_bindings
+  # Due to a bug of fish, we cannot use command substitution,
+  # so we use temporary file instead
+  if [ -z "$TMPDIR" ]
+    set -g TMPDIR /tmp
+  end
+
+  function __fzf_escape
+    while read item
+      echo -n (echo -n "$item" | sed -E 's/([ "$~'\''([{<>})])/\\\\\\1/g')' '
+    end
+  end
+
+  function __fzf_ctrl_t
+    set -q FZF_CTRL_T_COMMAND; or set -l FZF_CTRL_T_COMMAND "
+    command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
+      -o -type f -print \
+      -o -type d -print \
+      -o -type l -print 2> /dev/null | sed 1d | cut -b3-"
+    eval $FZF_CTRL_T_COMMAND | eval (__fzfcmd) -m > $TMPDIR/fzf.result
+    and commandline -i (cat $TMPDIR/fzf.result | __fzf_escape)
+    commandline -f repaint
+    rm -f $TMPDIR/fzf.result
+  end
+
+  function __fzf_ctrl_r
+    history | eval (__fzfcmd) +s +m --tiebreak=index --toggle-sort=ctrl-r > $TMPDIR/fzf.result
+    and commandline (cat $TMPDIR/fzf.result)
+    commandline -f repaint
+    rm -f $TMPDIR/fzf.result
+  end
+
+  function __fzf_alt_c
+    # Fish hangs if the command before pipe redirects (2> /dev/null)
+    command find -L . \( -path '*/\.*' -o -fstype 'dev' -o -fstype 'proc' \) \
+      -prune -o -type d -print 2> /dev/null | sed 1d | cut -b3- | eval (__fzfcmd) +m > $TMPDIR/fzf.result
+    [ (cat $TMPDIR/fzf.result | wc -l) -gt 0 ]
+    and cd (cat $TMPDIR/fzf.result)
+    commandline -f repaint
+    rm -f $TMPDIR/fzf.result
+  end
+
+  function __fzfcmd
+    set -q FZF_TMUX; or set FZF_TMUX 1
+
+    if [ $FZF_TMUX -eq 1 ]
+      if set -q FZF_TMUX_HEIGHT
+        echo "fzf-tmux -d$FZF_TMUX_HEIGHT"
+      else
+        echo "fzf-tmux -d40%"
+      end
+    else
+      echo "fzf"
+    end
+  end
+
+  bind \ct '__fzf_ctrl_t'
+  bind \cr '__fzf_ctrl_r'
+  bind \ec '__fzf_alt_c'
+
+  if bind -M insert > /dev/null 2>&1
+    bind -M insert \ct '__fzf_ctrl_t'
+    bind -M insert \cr '__fzf_ctrl_r'
+    bind -M insert \ec '__fzf_alt_c'
+  end
+end
+

shell/key-bindings.zsh

@@ -0,0 +1,52 @@
+# Key bindings
+# ------------
+if [[ $- =~ i ]]; then
+
+# CTRL-T - Paste the selected file path(s) into the command line
+__fsel() {
+  local cmd="${FZF_CTRL_T_COMMAND:-"command \\find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
+    -o -type f -print \
+    -o -type d -print \
+    -o -type l -print 2> /dev/null | sed 1d | cut -b3-"}"
+  eval "$cmd" | $(__fzfcmd) -m | while read item; do
+    printf '%q ' "$item"
+  done
+  echo
+}
+
+__fzfcmd() {
+  [ ${FZF_TMUX:-1} -eq 1 ] && echo "fzf-tmux -d${FZF_TMUX_HEIGHT:-40%}" || echo "fzf"
+}
+
+fzf-file-widget() {
+  LBUFFER="${LBUFFER}$(__fsel)"
+  zle redisplay
+}
+zle     -N   fzf-file-widget
+bindkey '^T' fzf-file-widget
+
+# ALT-C - cd into the selected directory
+fzf-cd-widget() {
+  cd "${$(command \find -L . \( -path '*/\.*' -o -fstype 'dev' -o -fstype 'proc' \) -prune \
+    -o -type d -print 2> /dev/null | sed 1d | cut -b3- | $(__fzfcmd) +m):-.}"
+  zle reset-prompt
+}
+zle     -N    fzf-cd-widget
+bindkey '\ec' fzf-cd-widget
+
+# CTRL-R - Paste the selected command from history into the command line
+fzf-history-widget() {
+  local selected restore_no_bang_hist
+  if selected=( $(fc -l 1 | $(__fzfcmd) +s --tac +m -n2..,.. --tiebreak=index --toggle-sort=ctrl-r -q "$LBUFFER") ); then
+    num=$selected[1]
+    if [ -n "$num" ]; then
+      zle vi-fetch-history -n $num
+    fi
+  fi
+  zle redisplay
+}
+zle     -N   fzf-history-widget
+bindkey '^R' fzf-history-widget
+
+fi
+

src/Dockerfile.arch

@@ -0,0 +1,27 @@
+FROM base/archlinux:2014.07.03
+MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
+
+# apt-get
+RUN pacman-db-upgrade && pacman -Syu --noconfirm base-devel git
+
+# Install Go 1.4
+RUN cd / && curl \
+    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
+    tar -xz && mv go go1.4
+
+ENV GOPATH /go
+ENV GOROOT /go1.4
+ENV PATH /go1.4/bin:$PATH
+
+# For i386 build
+RUN echo '[multilib]' >> /etc/pacman.conf && \
+    echo 'Include = /etc/pacman.d/mirrorlist' >> /etc/pacman.conf && \
+    pacman-db-upgrade && yes | pacman -Sy gcc-multilib lib32-ncurses && \
+    cd $GOROOT/src && GOARCH=386 ./make.bash
+
+# Volume
+VOLUME /go
+
+# Default CMD
+CMD cd /go/src/github.com/junegunn/fzf/src && /bin/bash
+

src/Dockerfile.centos

@@ -0,0 +1,21 @@
+FROM centos:centos7
+MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
+
+# yum
+RUN yum install -y git gcc make tar ncurses-devel
+
+# Install Go 1.4
+RUN cd / && curl \
+    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
+    tar -xz && mv go go1.4
+
+ENV GOPATH /go
+ENV GOROOT /go1.4
+ENV PATH /go1.4/bin:$PATH
+
+# Volume
+VOLUME /go
+
+# Default CMD
+CMD cd /go/src/github.com/junegunn/fzf/src && /bin/bash
+

src/Dockerfile.ubuntu

@@ -0,0 +1,26 @@
+FROM ubuntu:14.04
+MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
+
+# apt-get
+RUN apt-get update && apt-get -y upgrade && \
+    apt-get install -y --force-yes git curl build-essential libncurses-dev
+
+# Install Go 1.4
+RUN cd / && curl \
+    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
+    tar -xz && mv go go1.4
+
+ENV GOPATH /go
+ENV GOROOT /go1.4
+ENV PATH /go1.4/bin:$PATH
+
+# For i386 build
+RUN apt-get install -y lib32ncurses5-dev && \
+    cd $GOROOT/src && GOARCH=386 ./make.bash
+
+# Volume
+VOLUME /go
+
+# Default CMD
+CMD cd /go/src/github.com/junegunn/fzf/src && /bin/bash
+

src/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Junegunn Choi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

src/Makefile

@@ -0,0 +1,74 @@
+ifndef GOPATH
+$(error GOPATH is undefined)
+endif
+
+UNAME_S := $(shell uname -s)
+ifeq ($(UNAME_S),Darwin)
+	GOOS := darwin
+else ifeq ($(UNAME_S),Linux)
+	GOOS := linux
+endif
+
+ifneq ($(shell uname -m),x86_64)
+$(error "Build on $(UNAME_M) is not supported, yet.")
+endif
+
+SOURCES   := $(wildcard *.go */*.go)
+BINDIR    := ../bin
+
+BINARY32  := fzf-$(GOOS)_386
+BINARY64  := fzf-$(GOOS)_amd64
+VERSION    = $(shell fzf/$(BINARY64) --version)
+RELEASE32  = fzf-$(VERSION)-$(GOOS)_386
+RELEASE64  = fzf-$(VERSION)-$(GOOS)_amd64
+
+all: release
+
+release: build
+	cd fzf && \
+	cp $(BINARY32) $(RELEASE32) && tar -czf $(RELEASE32).tgz $(RELEASE32) && \
+	cp $(BINARY64) $(RELEASE64) && tar -czf $(RELEASE64).tgz $(RELEASE64) && \
+	rm $(RELEASE32) $(RELEASE64)
+
+build: test fzf/$(BINARY32) fzf/$(BINARY64)
+
+test:
+	go get
+	go test -v ./...
+
+install: $(BINDIR)/fzf
+
+uninstall:
+	rm -f $(BINDIR)/fzf $(BINDIR)/$(BINARY64)
+
+clean:
+	cd fzf && rm -f $(BINARY32) $(BINARY64) $(RELEASE32).tgz $(RELEASE64).tgz
+
+fzf/$(BINARY32): $(SOURCES)
+	cd fzf && GOARCH=386 CGO_ENABLED=1 go build -o $(BINARY32)
+
+fzf/$(BINARY64): $(SOURCES)
+	cd fzf && go build -o $(BINARY64)
+
+$(BINDIR)/fzf: fzf/$(BINARY64) | $(BINDIR)
+	cp -f fzf/$(BINARY64) $(BINDIR)
+	cd $(BINDIR) && ln -sf $(BINARY64) fzf
+
+$(BINDIR):
+	mkdir -p $@
+
+# Linux distribution to build fzf on
+DISTRO := arch
+
+docker:
+	docker build -t junegunn/$(DISTRO)-sandbox - < Dockerfile.$(DISTRO)
+
+linux: docker
+	docker run -i -t -v $(GOPATH):/go junegunn/$(DISTRO)-sandbox \
+		/bin/bash -ci 'cd /go/src/github.com/junegunn/fzf/src; make'
+
+$(DISTRO): docker
+	docker run -i -t -v $(GOPATH):/go junegunn/$(DISTRO)-sandbox \
+		sh -c 'cd /go/src/github.com/junegunn/fzf/src; /bin/bash'
+
+.PHONY: all build release test install uninstall clean docker linux $(DISTRO)

src/README.md

@@ -0,0 +1,121 @@
+fzf in Go
+=========
+
+<img src="https://cloud.githubusercontent.com/assets/700826/5725028/028ea834-9b93-11e4-9198-43088c3f295d.gif" height="463" alt="fzf in go">
+
+This directory contains the source code for the new fzf implementation in
+[Go][go].
+
+Upgrade from Ruby version
+-------------------------
+
+The install script has been updated to download the right binary for your
+system. If you already have installed fzf, simply git-pull the repository and
+rerun the install script.
+
+```sh
+cd ~/.fzf
+git pull
+./install
+```
+
+Otherwise, follow [the instruction][install] as before. You can also install
+fzf using Homebrew if you prefer that way.
+
+Motivations
+-----------
+
+### No Ruby dependency
+
+There have always been complaints about fzf being a Ruby script. To make
+matters worse, Ruby 2.1 removed ncurses binding from its standard libary.
+Because of the change, users running Ruby 2.1 or above are forced to build C
+extensions of curses gem to meet the requirement of fzf. The new Go version
+will be distributed as an executable binary so it will be much more accessible
+and should be easier to setup.
+
+### Performance
+
+Many people have been surprised to see how fast fzf is even when it was
+written in Ruby. It stays quite responsive even for 100k+ lines, which is
+well above the size of the usual input.
+
+The new Go version, of course, is significantly faster than that. It has all
+the performance optimization techniques used in Ruby implementation and more.
+It also doesn't suffer from [GIL][gil], so the search performance scales
+proportional to the number of CPU cores. On my MacBook Pro (Mid 2012), the new
+version was shown to be an order of magnitude faster on certain cases. It also
+starts much faster though the difference may not be noticeable.
+
+Differences with Ruby version
+-----------------------------
+
+The Go version is designed to be perfectly compatible with the previous Ruby
+version. The only behavioral difference is that the new version ignores the
+numeric argument to `--sort=N` option and always sorts the result regardless
+of the number of matches. The value was introduced to limit the response time
+of the query, but the Go version is blazingly fast (almost instant response
+even for 1M+ items) so I decided that it's no longer required.
+
+System requirements
+-------------------
+
+Currently, prebuilt binaries are provided only for OS X and Linux. The install
+script will fall back to the legacy Ruby version on the other systems, but if
+you have Go 1.4 installed, you can try building it yourself.
+
+However, as pointed out in [golang.org/doc/install][req], the Go version may
+not run on CentOS/RHEL 5.x, and if that's the case, the install script will
+choose the Ruby version instead.
+
+The Go version depends on [ncurses][ncurses] and some Unix system calls, so it
+shouldn't run natively on Windows at the moment. But it won't be impossible to
+support Windows by falling back to a cross-platform alternative such as
+[termbox][termbox] only on Windows. If you're interested in making fzf work on
+Windows, please let me know.
+
+Build
+-----
+
+```sh
+# Build fzf executables and tarballs
+make
+
+# Install the executable to ../bin directory
+make install
+
+# Build executables and tarballs for Linux using Docker
+make linux
+```
+
+Contribution
+------------
+
+For the time being, I will not add or accept any new features until we can be
+sure that the implementation is stable and we have a sufficient number of test
+cases. However, fixes for obvious bugs and new test cases are welcome.
+
+I also care much about the performance of the implementation, so please make
+sure that your change does not result in performance regression. And please be
+noted that we don't have a quantitative measure of the performance yet.
+
+Third-party libraries used
+--------------------------
+
+- [ncurses][ncurses]
+- [mattn/go-runewidth](https://github.com/mattn/go-runewidth)
+    - Licensed under [MIT](http://mattn.mit-license.org/2013)
+- [mattn/go-shellwords](https://github.com/mattn/go-shellwords)
+    - Licensed under [MIT](http://mattn.mit-license.org/2014)
+
+License
+-------
+
+[MIT](LICENSE)
+
+[install]: https://github.com/junegunn/fzf#installation
+[go]:      https://golang.org/
+[gil]:     http://en.wikipedia.org/wiki/Global_Interpreter_Lock
+[ncurses]: https://www.gnu.org/software/ncurses/
+[req]:     http://golang.org/doc/install
+[termbox]: https://github.com/nsf/termbox-go

src/algo/algo.go

@@ -0,0 +1,176 @@
+package algo
+
+import (
+	"strings"
+	"unicode"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+/*
+ * String matching algorithms here do not use strings.ToLower to avoid
+ * performance penalty. And they assume pattern runes are given in lowercase
+ * letters when caseSensitive is false.
+ *
+ * In short: They try to do as little work as possible.
+ */
+
+// FuzzyMatch performs fuzzy-match
+func FuzzyMatch(caseSensitive bool, runes *[]rune, pattern []rune) (int, int) {
+	if len(pattern) == 0 {
+		return 0, 0
+	}
+
+	// 0. (FIXME) How to find the shortest match?
+	//    a_____b__c__abc
+	//    ^^^^^^^^^^  ^^^
+	// 1. forward scan (abc)
+	//   *-----*-----*>
+	//   a_____b___abc__
+	// 2. reverse scan (cba)
+	//   a_____b___abc__
+	//            <***
+	pidx := 0
+	sidx := -1
+	eidx := -1
+
+	for index, char := range *runes {
+		// This is considerably faster than blindly applying strings.ToLower to the
+		// whole string
+		if !caseSensitive {
+			// Partially inlining `unicode.ToLower`. Ugly, but makes a noticeable
+			// difference in CPU cost. (Measured on Go 1.4.1. Also note that the Go
+			// compiler as of now does not inline non-leaf functions.)
+			if char >= 'A' && char <= 'Z' {
+				char += 32
+			} else if char > unicode.MaxASCII {
+				char = unicode.To(unicode.LowerCase, char)
+			}
+		}
+		if char == pattern[pidx] {
+			if sidx < 0 {
+				sidx = index
+			}
+			if pidx++; pidx == len(pattern) {
+				eidx = index + 1
+				break
+			}
+		}
+	}
+
+	if sidx >= 0 && eidx >= 0 {
+		pidx--
+		for index := eidx - 1; index >= sidx; index-- {
+			char := (*runes)[index]
+			if !caseSensitive {
+				if char >= 'A' && char <= 'Z' {
+					char += 32
+				} else if char > unicode.MaxASCII {
+					char = unicode.To(unicode.LowerCase, char)
+				}
+			}
+			if char == pattern[pidx] {
+				if pidx--; pidx < 0 {
+					sidx = index
+					break
+				}
+			}
+		}
+		return sidx, eidx
+	}
+	return -1, -1
+}
+
+// ExactMatchNaive is a basic string searching algorithm that handles case
+// sensitivity. Although naive, it still performs better than the combination
+// of strings.ToLower + strings.Index for typical fzf use cases where input
+// strings and patterns are not very long.
+//
+// We might try to implement better algorithms in the future:
+// http://en.wikipedia.org/wiki/String_searching_algorithm
+func ExactMatchNaive(caseSensitive bool, runes *[]rune, pattern []rune) (int, int) {
+	if len(pattern) == 0 {
+		return 0, 0
+	}
+
+	numRunes := len(*runes)
+	plen := len(pattern)
+	if numRunes < plen {
+		return -1, -1
+	}
+
+	pidx := 0
+	for index := 0; index < numRunes; index++ {
+		char := (*runes)[index]
+		if !caseSensitive {
+			if char >= 'A' && char <= 'Z' {
+				char += 32
+			} else if char > unicode.MaxASCII {
+				char = unicode.To(unicode.LowerCase, char)
+			}
+		}
+		if pattern[pidx] == char {
+			pidx++
+			if pidx == plen {
+				return index - plen + 1, index + 1
+			}
+		} else {
+			index -= pidx
+			pidx = 0
+		}
+	}
+	return -1, -1
+}
+
+// PrefixMatch performs prefix-match
+func PrefixMatch(caseSensitive bool, runes *[]rune, pattern []rune) (int, int) {
+	if len(*runes) < len(pattern) {
+		return -1, -1
+	}
+
+	for index, r := range pattern {
+		char := (*runes)[index]
+		if !caseSensitive {
+			char = unicode.ToLower(char)
+		}
+		if char != r {
+			return -1, -1
+		}
+	}
+	return 0, len(pattern)
+}
+
+// SuffixMatch performs suffix-match
+func SuffixMatch(caseSensitive bool, input *[]rune, pattern []rune) (int, int) {
+	runes := util.TrimRight(input)
+	trimmedLen := len(runes)
+	diff := trimmedLen - len(pattern)
+	if diff < 0 {
+		return -1, -1
+	}
+
+	for index, r := range pattern {
+		char := runes[index+diff]
+		if !caseSensitive {
+			char = unicode.ToLower(char)
+		}
+		if char != r {
+			return -1, -1
+		}
+	}
+	return trimmedLen - len(pattern), trimmedLen
+}
+
+func EqualMatch(caseSensitive bool, runes *[]rune, pattern []rune) (int, int) {
+	if len(*runes) != len(pattern) {
+		return -1, -1
+	}
+	runesStr := string(*runes)
+	if !caseSensitive {
+		runesStr = strings.ToLower(runesStr)
+	}
+	if runesStr == string(pattern) {
+		return 0, len(pattern)
+	}
+	return -1, -1
+}

src/algo/algo_test.go

@@ -0,0 +1,52 @@
+package algo
+
+import (
+	"strings"
+	"testing"
+)
+
+func assertMatch(t *testing.T, fun func(bool, *[]rune, []rune) (int, int), caseSensitive bool, input string, pattern string, sidx int, eidx int) {
+	if !caseSensitive {
+		pattern = strings.ToLower(pattern)
+	}
+	runes := []rune(input)
+	s, e := fun(caseSensitive, &runes, []rune(pattern))
+	if s != sidx {
+		t.Errorf("Invalid start index: %d (expected: %d, %s / %s)", s, sidx, input, pattern)
+	}
+	if e != eidx {
+		t.Errorf("Invalid end index: %d (expected: %d, %s / %s)", e, eidx, input, pattern)
+	}
+}
+
+func TestFuzzyMatch(t *testing.T) {
+	assertMatch(t, FuzzyMatch, false, "fooBarbaz", "oBZ", 2, 9)
+	assertMatch(t, FuzzyMatch, true, "fooBarbaz", "oBZ", -1, -1)
+	assertMatch(t, FuzzyMatch, true, "fooBarbaz", "oBz", 2, 9)
+	assertMatch(t, FuzzyMatch, true, "fooBarbaz", "fooBarbazz", -1, -1)
+}
+
+func TestExactMatchNaive(t *testing.T) {
+	assertMatch(t, ExactMatchNaive, false, "fooBarbaz", "oBA", 2, 5)
+	assertMatch(t, ExactMatchNaive, true, "fooBarbaz", "oBA", -1, -1)
+	assertMatch(t, ExactMatchNaive, true, "fooBarbaz", "fooBarbazz", -1, -1)
+}
+
+func TestPrefixMatch(t *testing.T) {
+	assertMatch(t, PrefixMatch, false, "fooBarbaz", "Foo", 0, 3)
+	assertMatch(t, PrefixMatch, true, "fooBarbaz", "Foo", -1, -1)
+	assertMatch(t, PrefixMatch, false, "fooBarbaz", "baz", -1, -1)
+}
+
+func TestSuffixMatch(t *testing.T) {
+	assertMatch(t, SuffixMatch, false, "fooBarbaz", "Foo", -1, -1)
+	assertMatch(t, SuffixMatch, false, "fooBarbaz", "baz", 6, 9)
+	assertMatch(t, SuffixMatch, true, "fooBarbaz", "Baz", -1, -1)
+}
+
+func TestEmptyPattern(t *testing.T) {
+	assertMatch(t, FuzzyMatch, true, "foobar", "", 0, 0)
+	assertMatch(t, ExactMatchNaive, true, "foobar", "", 0, 0)
+	assertMatch(t, PrefixMatch, true, "foobar", "", 0, 0)
+	assertMatch(t, SuffixMatch, true, "foobar", "", 6, 6)
+}

src/ansi.go

@@ -0,0 +1,150 @@
+package fzf
+
+import (
+	"bytes"
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+)
+
+type ansiOffset struct {
+	offset [2]int32
+	color  ansiState
+}
+
+type ansiState struct {
+	fg   int
+	bg   int
+	bold bool
+}
+
+func (s *ansiState) colored() bool {
+	return s.fg != -1 || s.bg != -1 || s.bold
+}
+
+func (s *ansiState) equals(t *ansiState) bool {
+	if t == nil {
+		return !s.colored()
+	}
+	return s.fg == t.fg && s.bg == t.bg && s.bold == t.bold
+}
+
+var ansiRegex *regexp.Regexp
+
+func init() {
+	ansiRegex = regexp.MustCompile("\x1b\\[[0-9;]*[mK]")
+}
+
+func extractColor(str *string, state *ansiState) (*string, []ansiOffset, *ansiState) {
+	var offsets []ansiOffset
+	var output bytes.Buffer
+
+	if state != nil {
+		offsets = append(offsets, ansiOffset{[2]int32{0, 0}, *state})
+	}
+
+	idx := 0
+	for _, offset := range ansiRegex.FindAllStringIndex(*str, -1) {
+		output.WriteString((*str)[idx:offset[0]])
+		newState := interpretCode((*str)[offset[0]:offset[1]], state)
+
+		if !newState.equals(state) {
+			if state != nil {
+				// Update last offset
+				(&offsets[len(offsets)-1]).offset[1] = int32(utf8.RuneCount(output.Bytes()))
+			}
+
+			if newState.colored() {
+				// Append new offset
+				state = newState
+				newLen := int32(utf8.RuneCount(output.Bytes()))
+				offsets = append(offsets, ansiOffset{[2]int32{newLen, newLen}, *state})
+			} else {
+				// Discard state
+				state = nil
+			}
+		}
+
+		idx = offset[1]
+	}
+
+	rest := (*str)[idx:]
+	if len(rest) > 0 {
+		output.WriteString(rest)
+		if state != nil {
+			// Update last offset
+			(&offsets[len(offsets)-1]).offset[1] = int32(utf8.RuneCount(output.Bytes()))
+		}
+	}
+	outputStr := output.String()
+	return &outputStr, offsets, state
+}
+
+func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
+	// State
+	var state *ansiState
+	if prevState == nil {
+		state = &ansiState{-1, -1, false}
+	} else {
+		state = &ansiState{prevState.fg, prevState.bg, prevState.bold}
+	}
+	if ansiCode[len(ansiCode)-1] == 'K' {
+		return state
+	}
+
+	ptr := &state.fg
+	state256 := 0
+
+	init := func() {
+		state.fg = -1
+		state.bg = -1
+		state.bold = false
+		state256 = 0
+	}
+
+	ansiCode = ansiCode[2 : len(ansiCode)-1]
+	if len(ansiCode) == 0 {
+		init()
+	}
+	for _, code := range strings.Split(ansiCode, ";") {
+		if num, err := strconv.Atoi(code); err == nil {
+			switch state256 {
+			case 0:
+				switch num {
+				case 38:
+					ptr = &state.fg
+					state256++
+				case 48:
+					ptr = &state.bg
+					state256++
+				case 39:
+					state.fg = -1
+				case 49:
+					state.bg = -1
+				case 1:
+					state.bold = true
+				case 0:
+					init()
+				default:
+					if num >= 30 && num <= 37 {
+						state.fg = num - 30
+					} else if num >= 40 && num <= 47 {
+						state.bg = num - 40
+					}
+				}
+			case 1:
+				switch num {
+				case 5:
+					state256++
+				default:
+					state256 = 0
+				}
+			case 2:
+				*ptr = num
+				state256 = 0
+			}
+		}
+	}
+	return state
+}

src/ansi_test.go

@@ -0,0 +1,152 @@
+package fzf
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestExtractColor(t *testing.T) {
+	assert := func(offset ansiOffset, b int32, e int32, fg int, bg int, bold bool) {
+		if offset.offset[0] != b || offset.offset[1] != e ||
+			offset.color.fg != fg || offset.color.bg != bg || offset.color.bold != bold {
+			t.Error(offset, b, e, fg, bg, bold)
+		}
+	}
+
+	src := "hello world"
+	var state *ansiState
+	clean := "\x1b[0m"
+	check := func(assertion func(ansiOffsets []ansiOffset, state *ansiState)) {
+		output, ansiOffsets, newState := extractColor(&src, state)
+		state = newState
+		if *output != "hello world" {
+			t.Errorf("Invalid output: {}", output)
+		}
+		fmt.Println(src, ansiOffsets, clean)
+		assertion(ansiOffsets, state)
+	}
+
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) > 0 {
+			t.Fail()
+		}
+	})
+
+	state = nil
+	src = "\x1b[0mhello world"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) > 0 {
+			t.Fail()
+		}
+	})
+
+	state = nil
+	src = "\x1b[1mhello world"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 1 {
+			t.Fail()
+		}
+		assert(offsets[0], 0, 11, -1, -1, true)
+	})
+
+	state = nil
+	src = "\x1b[1mhello \x1b[mworld"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 1 {
+			t.Fail()
+		}
+		assert(offsets[0], 0, 6, -1, -1, true)
+	})
+
+	state = nil
+	src = "\x1b[1mhello \x1b[Kworld"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 1 {
+			t.Fail()
+		}
+		assert(offsets[0], 0, 11, -1, -1, true)
+	})
+
+	state = nil
+	src = "hello \x1b[34;45;1mworld"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 1 {
+			t.Fail()
+		}
+		assert(offsets[0], 6, 11, 4, 5, true)
+	})
+
+	state = nil
+	src = "hello \x1b[34;45;1mwor\x1b[34;45;1mld"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 1 {
+			t.Fail()
+		}
+		assert(offsets[0], 6, 11, 4, 5, true)
+	})
+
+	state = nil
+	src = "hello \x1b[34;45;1mwor\x1b[0mld"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 1 {
+			t.Fail()
+		}
+		assert(offsets[0], 6, 9, 4, 5, true)
+	})
+
+	state = nil
+	src = "hello \x1b[34;48;5;233;1mwo\x1b[38;5;161mr\x1b[0ml\x1b[38;5;161md"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 3 {
+			t.Fail()
+		}
+		assert(offsets[0], 6, 8, 4, 233, true)
+		assert(offsets[1], 8, 9, 161, 233, true)
+		assert(offsets[2], 10, 11, 161, -1, false)
+	})
+
+	// {38,48};5;{38,48}
+	state = nil
+	src = "hello \x1b[38;5;38;48;5;48;1mwor\x1b[38;5;48;48;5;38ml\x1b[0md"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 2 {
+			t.Fail()
+		}
+		assert(offsets[0], 6, 9, 38, 48, true)
+		assert(offsets[1], 9, 10, 48, 38, true)
+	})
+
+	src = "hello \x1b[32;1mworld"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 1 {
+			t.Fail()
+		}
+		if state.fg != 2 || state.bg != -1 || !state.bold {
+			t.Fail()
+		}
+		assert(offsets[0], 6, 11, 2, -1, true)
+	})
+
+	src = "hello world"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 1 {
+			t.Fail()
+		}
+		if state.fg != 2 || state.bg != -1 || !state.bold {
+			t.Fail()
+		}
+		assert(offsets[0], 0, 11, 2, -1, true)
+	})
+
+	src = "hello \x1b[0;38;5;200;48;5;100mworld"
+	check(func(offsets []ansiOffset, state *ansiState) {
+		if len(offsets) != 2 {
+			t.Fail()
+		}
+		if state.fg != 200 || state.bg != 100 || state.bold {
+			t.Fail()
+		}
+		assert(offsets[0], 0, 6, 2, -1, true)
+		assert(offsets[1], 6, 11, 200, 100, false)
+	})
+}

src/cache.go

@@ -0,0 +1,53 @@
+package fzf
+
+import "sync"
+
+// queryCache associates strings to lists of items
+type queryCache map[string][]*Item
+
+// ChunkCache associates Chunk and query string to lists of items
+type ChunkCache struct {
+	mutex sync.Mutex
+	cache map[*Chunk]*queryCache
+}
+
+// NewChunkCache returns a new ChunkCache
+func NewChunkCache() ChunkCache {
+	return ChunkCache{sync.Mutex{}, make(map[*Chunk]*queryCache)}
+}
+
+// Add adds the list to the cache
+func (cc *ChunkCache) Add(chunk *Chunk, key string, list []*Item) {
+	if len(key) == 0 || !chunk.IsFull() || len(list) > queryCacheMax {
+		return
+	}
+
+	cc.mutex.Lock()
+	defer cc.mutex.Unlock()
+
+	qc, ok := cc.cache[chunk]
+	if !ok {
+		cc.cache[chunk] = &queryCache{}
+		qc = cc.cache[chunk]
+	}
+	(*qc)[key] = list
+}
+
+// Find is called to lookup ChunkCache
+func (cc *ChunkCache) Find(chunk *Chunk, key string) ([]*Item, bool) {
+	if len(key) == 0 || !chunk.IsFull() {
+		return nil, false
+	}
+
+	cc.mutex.Lock()
+	defer cc.mutex.Unlock()
+
+	qc, ok := cc.cache[chunk]
+	if ok {
+		list, ok := (*qc)[key]
+		if ok {
+			return list, true
+		}
+	}
+	return nil, false
+}

src/cache_test.go

@@ -0,0 +1,40 @@
+package fzf
+
+import "testing"
+
+func TestChunkCache(t *testing.T) {
+	cache := NewChunkCache()
+	chunk2 := make(Chunk, chunkSize)
+	chunk1p := &Chunk{}
+	chunk2p := &chunk2
+	items1 := []*Item{&Item{}}
+	items2 := []*Item{&Item{}, &Item{}}
+	cache.Add(chunk1p, "foo", items1)
+	cache.Add(chunk2p, "foo", items1)
+	cache.Add(chunk2p, "bar", items2)
+
+	{ // chunk1 is not full
+		cached, found := cache.Find(chunk1p, "foo")
+		if found {
+			t.Error("Cached disabled for non-empty chunks", found, cached)
+		}
+	}
+	{
+		cached, found := cache.Find(chunk2p, "foo")
+		if !found || len(cached) != 1 {
+			t.Error("Expected 1 item cached", found, cached)
+		}
+	}
+	{
+		cached, found := cache.Find(chunk2p, "bar")
+		if !found || len(cached) != 2 {
+			t.Error("Expected 2 items cached", found, cached)
+		}
+	}
+	{
+		cached, found := cache.Find(chunk1p, "foobar")
+		if found {
+			t.Error("Expected 0 item cached", found, cached)
+		}
+	}
+}

src/chunklist.go

@@ -0,0 +1,93 @@
+package fzf
+
+import "sync"
+
+// Chunk is a list of Item pointers whose size has the upper limit of chunkSize
+type Chunk []*Item // >>> []Item
+
+// ItemBuilder is a closure type that builds Item object from a pointer to a
+// string and an integer
+type ItemBuilder func(*string, int) *Item
+
+// ChunkList is a list of Chunks
+type ChunkList struct {
+	chunks []*Chunk
+	count  int
+	mutex  sync.Mutex
+	trans  ItemBuilder
+}
+
+// NewChunkList returns a new ChunkList
+func NewChunkList(trans ItemBuilder) *ChunkList {
+	return &ChunkList{
+		chunks: []*Chunk{},
+		count:  0,
+		mutex:  sync.Mutex{},
+		trans:  trans}
+}
+
+func (c *Chunk) push(trans ItemBuilder, data *string, index int) bool {
+	item := trans(data, index)
+	if item != nil {
+		*c = append(*c, item)
+		return true
+	}
+	return false
+}
+
+// IsFull returns true if the Chunk is full
+func (c *Chunk) IsFull() bool {
+	return len(*c) == chunkSize
+}
+
+func (cl *ChunkList) lastChunk() *Chunk {
+	return cl.chunks[len(cl.chunks)-1]
+}
+
+// CountItems returns the total number of Items
+func CountItems(cs []*Chunk) int {
+	if len(cs) == 0 {
+		return 0
+	}
+	return chunkSize*(len(cs)-1) + len(*(cs[len(cs)-1]))
+}
+
+// Push adds the item to the list
+func (cl *ChunkList) Push(data string) bool {
+	cl.mutex.Lock()
+	defer cl.mutex.Unlock()
+
+	if len(cl.chunks) == 0 || cl.lastChunk().IsFull() {
+		newChunk := Chunk(make([]*Item, 0, chunkSize))
+		cl.chunks = append(cl.chunks, &newChunk)
+	}
+
+	if cl.lastChunk().push(cl.trans, &data, cl.count) {
+		cl.count++
+		return true
+	}
+	return false
+}
+
+// Snapshot returns immutable snapshot of the ChunkList
+func (cl *ChunkList) Snapshot() ([]*Chunk, int) {
+	cl.mutex.Lock()
+	defer cl.mutex.Unlock()
+
+	ret := make([]*Chunk, len(cl.chunks))
+	copy(ret, cl.chunks)
+
+	// Duplicate the last chunk
+	if cnt := len(ret); cnt > 0 {
+		ret[cnt-1] = ret[cnt-1].dupe()
+	}
+	return ret, cl.count
+}
+
+func (c *Chunk) dupe() *Chunk {
+	newChunk := make(Chunk, len(*c))
+	for idx, ptr := range *c {
+		newChunk[idx] = ptr
+	}
+	return &newChunk
+}

src/chunklist_test.go

@@ -0,0 +1,74 @@
+package fzf
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestChunkList(t *testing.T) {
+	cl := NewChunkList(func(s *string, i int) *Item {
+		return &Item{text: s, rank: Rank{0, 0, uint32(i * 2)}}
+	})
+
+	// Snapshot
+	snapshot, count := cl.Snapshot()
+	if len(snapshot) > 0 || count > 0 {
+		t.Error("Snapshot should be empty now")
+	}
+
+	// Add some data
+	cl.Push("hello")
+	cl.Push("world")
+
+	// Previously created snapshot should remain the same
+	if len(snapshot) > 0 {
+		t.Error("Snapshot should not have changed")
+	}
+
+	// But the new snapshot should contain the added items
+	snapshot, count = cl.Snapshot()
+	if len(snapshot) != 1 && count != 2 {
+		t.Error("Snapshot should not be empty now")
+	}
+
+	// Check the content of the ChunkList
+	chunk1 := snapshot[0]
+	if len(*chunk1) != 2 {
+		t.Error("Snapshot should contain only two items")
+	}
+	if *(*chunk1)[0].text != "hello" || (*chunk1)[0].rank.index != 0 ||
+		*(*chunk1)[1].text != "world" || (*chunk1)[1].rank.index != 2 {
+		t.Error("Invalid data")
+	}
+	if chunk1.IsFull() {
+		t.Error("Chunk should not have been marked full yet")
+	}
+
+	// Add more data
+	for i := 0; i < chunkSize*2; i++ {
+		cl.Push(fmt.Sprintf("item %d", i))
+	}
+
+	// Previous snapshot should remain the same
+	if len(snapshot) != 1 {
+		t.Error("Snapshot should stay the same")
+	}
+
+	// New snapshot
+	snapshot, count = cl.Snapshot()
+	if len(snapshot) != 3 || !snapshot[0].IsFull() ||
+		!snapshot[1].IsFull() || snapshot[2].IsFull() || count != chunkSize*2+2 {
+		t.Error("Expected two full chunks and one more chunk")
+	}
+	if len(*snapshot[2]) != 2 {
+		t.Error("Unexpected number of items")
+	}
+
+	cl.Push("hello")
+	cl.Push("world")
+
+	lastChunkCount := len(*snapshot[len(snapshot)-1])
+	if lastChunkCount != 2 {
+		t.Error("Unexpected number of items:", lastChunkCount)
+	}
+}

src/constants.go

@@ -0,0 +1,49 @@
+package fzf
+
+import (
+	"time"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+const (
+	// Current version
+	Version = "0.10.1"
+
+	// Core
+	coordinatorDelayMax  time.Duration = 100 * time.Millisecond
+	coordinatorDelayStep time.Duration = 10 * time.Millisecond
+
+	// Reader
+	defaultCommand = `find * -path '*/\.*' -prune -o -type f -print -o -type l -print 2> /dev/null`
+
+	// Terminal
+	initialDelay    = 100 * time.Millisecond
+	spinnerDuration = 200 * time.Millisecond
+
+	// Matcher
+	progressMinDuration = 200 * time.Millisecond
+
+	// Capacity of each chunk
+	chunkSize int = 100
+
+	// Do not cache results of low selectivity queries
+	queryCacheMax int = chunkSize / 5
+
+	// Not to cache mergers with large lists
+	mergerCacheMax int = 100000
+
+	// History
+	defaultHistoryMax int = 1000
+)
+
+// fzf events
+const (
+	EvtReadNew util.EventType = iota
+	EvtReadFin
+	EvtSearchNew
+	EvtSearchProgress
+	EvtSearchFin
+	EvtHeader
+	EvtClose
+)

src/core.go

@@ -0,0 +1,267 @@
+/*
+Package fzf implements fzf, a command-line fuzzy finder.
+
+The MIT License (MIT)
+
+Copyright (c) 2015 Junegunn Choi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+package fzf
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+	"time"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func initProcs() {
+	runtime.GOMAXPROCS(runtime.NumCPU())
+}
+
+/*
+Reader   -> EvtReadFin
+Reader   -> EvtReadNew        -> Matcher  (restart)
+Terminal -> EvtSearchNew:bool -> Matcher  (restart)
+Matcher  -> EvtSearchProgress -> Terminal (update info)
+Matcher  -> EvtSearchFin      -> Terminal (update list)
+Matcher  -> EvtHeader         -> Terminal (update header)
+*/
+
+// Run starts fzf
+func Run(opts *Options) {
+	initProcs()
+
+	sort := opts.Sort > 0
+	rankTiebreak = opts.Tiebreak
+
+	if opts.Version {
+		fmt.Println(Version)
+		os.Exit(0)
+	}
+
+	// Event channel
+	eventBox := util.NewEventBox()
+
+	// ANSI code processor
+	ansiProcessor := func(data *string) (*string, []ansiOffset) {
+		// By default, we do nothing
+		return data, nil
+	}
+	if opts.Ansi {
+		if opts.Theme != nil {
+			var state *ansiState
+			ansiProcessor = func(data *string) (*string, []ansiOffset) {
+				trimmed, offsets, newState := extractColor(data, state)
+				state = newState
+				return trimmed, offsets
+			}
+		} else {
+			// When color is disabled but ansi option is given,
+			// we simply strip out ANSI codes from the input
+			ansiProcessor = func(data *string) (*string, []ansiOffset) {
+				trimmed, _, _ := extractColor(data, nil)
+				return trimmed, nil
+			}
+		}
+	}
+
+	// Chunk list
+	var chunkList *ChunkList
+	header := make([]string, 0, opts.HeaderLines)
+	if len(opts.WithNth) == 0 {
+		chunkList = NewChunkList(func(data *string, index int) *Item {
+			if len(header) < opts.HeaderLines {
+				header = append(header, *data)
+				eventBox.Set(EvtHeader, header)
+				return nil
+			}
+			data, colors := ansiProcessor(data)
+			return &Item{
+				text:   data,
+				index:  uint32(index),
+				colors: colors,
+				rank:   Rank{0, 0, uint32(index)}}
+		})
+	} else {
+		chunkList = NewChunkList(func(data *string, index int) *Item {
+			tokens := Tokenize(data, opts.Delimiter)
+			trans := Transform(tokens, opts.WithNth)
+			if len(header) < opts.HeaderLines {
+				header = append(header, *joinTokens(trans))
+				eventBox.Set(EvtHeader, header)
+				return nil
+			}
+			item := Item{
+				text:     joinTokens(trans),
+				origText: data,
+				index:    uint32(index),
+				colors:   nil,
+				rank:     Rank{0, 0, uint32(index)}}
+
+			trimmed, colors := ansiProcessor(item.text)
+			item.text = trimmed
+			item.colors = colors
+			return &item
+		})
+	}
+
+	// Reader
+	streamingFilter := opts.Filter != nil && !sort && !opts.Tac && !opts.Sync
+	if !streamingFilter {
+		reader := Reader{func(str string) bool {
+			return chunkList.Push(str)
+		}, eventBox, opts.ReadZero}
+		go reader.ReadSource()
+	}
+
+	// Matcher
+	patternBuilder := func(runes []rune) *Pattern {
+		return BuildPattern(
+			opts.Mode, opts.Case, opts.Nth, opts.Delimiter, runes)
+	}
+	matcher := NewMatcher(patternBuilder, sort, opts.Tac, eventBox)
+
+	// Filtering mode
+	if opts.Filter != nil {
+		if opts.PrintQuery {
+			fmt.Println(*opts.Filter)
+		}
+
+		pattern := patternBuilder([]rune(*opts.Filter))
+
+		if streamingFilter {
+			reader := Reader{
+				func(str string) bool {
+					item := chunkList.trans(&str, 0)
+					if item != nil && pattern.MatchItem(item) {
+						fmt.Println(*item.text)
+					}
+					return false
+				}, eventBox, opts.ReadZero}
+			reader.ReadSource()
+		} else {
+			eventBox.Unwatch(EvtReadNew)
+			eventBox.WaitFor(EvtReadFin)
+
+			snapshot, _ := chunkList.Snapshot()
+			merger, _ := matcher.scan(MatchRequest{
+				chunks:  snapshot,
+				pattern: pattern})
+			for i := 0; i < merger.Length(); i++ {
+				fmt.Println(merger.Get(i).AsString())
+			}
+		}
+		os.Exit(0)
+	}
+
+	// Synchronous search
+	if opts.Sync {
+		eventBox.Unwatch(EvtReadNew)
+		eventBox.WaitFor(EvtReadFin)
+	}
+
+	// Go interactive
+	go matcher.Loop()
+
+	// Terminal I/O
+	terminal := NewTerminal(opts, eventBox)
+	deferred := opts.Select1 || opts.Exit0
+	go terminal.Loop()
+	if !deferred {
+		terminal.startChan <- true
+	}
+
+	// Event coordination
+	reading := true
+	ticks := 0
+	eventBox.Watch(EvtReadNew)
+	for {
+		delay := true
+		ticks++
+		eventBox.Wait(func(events *util.Events) {
+			defer events.Clear()
+			for evt, value := range *events {
+				switch evt {
+
+				case EvtReadNew, EvtReadFin:
+					reading = reading && evt == EvtReadNew
+					snapshot, count := chunkList.Snapshot()
+					terminal.UpdateCount(count, !reading)
+					matcher.Reset(snapshot, terminal.Input(), false, !reading, sort)
+
+				case EvtSearchNew:
+					switch val := value.(type) {
+					case bool:
+						sort = val
+					}
+					snapshot, _ := chunkList.Snapshot()
+					matcher.Reset(snapshot, terminal.Input(), true, !reading, sort)
+					delay = false
+
+				case EvtSearchProgress:
+					switch val := value.(type) {
+					case float32:
+						terminal.UpdateProgress(val)
+					}
+
+				case EvtHeader:
+					terminal.UpdateHeader(value.([]string), opts.HeaderLines)
+
+				case EvtSearchFin:
+					switch val := value.(type) {
+					case *Merger:
+						if deferred {
+							count := val.Length()
+							if opts.Select1 && count > 1 || opts.Exit0 && !opts.Select1 && count > 0 {
+								deferred = false
+								terminal.startChan <- true
+							} else if val.final {
+								if opts.Exit0 && count == 0 || opts.Select1 && count == 1 {
+									if opts.PrintQuery {
+										fmt.Println(opts.Query)
+									}
+									if len(opts.Expect) > 0 {
+										fmt.Println()
+									}
+									for i := 0; i < count; i++ {
+										fmt.Println(val.Get(i).AsString())
+									}
+									os.Exit(0)
+								}
+								deferred = false
+								terminal.startChan <- true
+							}
+						}
+						terminal.UpdateList(val)
+					}
+				}
+			}
+		})
+		if delay && reading {
+			dur := util.DurWithin(
+				time.Duration(ticks)*coordinatorDelayStep,
+				0, coordinatorDelayMax)
+			time.Sleep(dur)
+		}
+	}
+}

src/curses/curses.go

@@ -0,0 +1,551 @@
+package curses
+
+/*
+#include <ncurses.h>
+#include <locale.h>
+#cgo LDFLAGS: -lncurses
+*/
+import "C"
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+	"unicode/utf8"
+)
+
+// Types of user action
+const (
+	Rune = iota
+
+	CtrlA
+	CtrlB
+	CtrlC
+	CtrlD
+	CtrlE
+	CtrlF
+	CtrlG
+	CtrlH
+	Tab
+	CtrlJ
+	CtrlK
+	CtrlL
+	CtrlM
+	CtrlN
+	CtrlO
+	CtrlP
+	CtrlQ
+	CtrlR
+	CtrlS
+	CtrlT
+	CtrlU
+	CtrlV
+	CtrlW
+	CtrlX
+	CtrlY
+	CtrlZ
+	ESC
+
+	Invalid
+	Mouse
+
+	BTab
+	BSpace
+
+	Del
+	PgUp
+	PgDn
+
+	Up
+	Down
+	Left
+	Right
+	Home
+	End
+
+	SLeft
+	SRight
+
+	F1
+	F2
+	F3
+	F4
+
+	AltBS
+	AltA
+	AltB
+	AltC
+	AltD
+	AltE
+	AltF
+
+	AltZ = AltA + 'z' - 'a'
+)
+
+// Pallete
+const (
+	ColNormal = iota
+	ColPrompt
+	ColMatch
+	ColCurrent
+	ColCurrentMatch
+	ColSpinner
+	ColInfo
+	ColCursor
+	ColSelected
+	ColHeader
+	ColUser
+)
+
+const (
+	doubleClickDuration = 500 * time.Millisecond
+)
+
+type ColorTheme struct {
+	UseDefault   bool
+	Fg           int16
+	Bg           int16
+	DarkBg       int16
+	Prompt       int16
+	Match        int16
+	Current      int16
+	CurrentMatch int16
+	Spinner      int16
+	Info         int16
+	Cursor       int16
+	Selected     int16
+	Header       int16
+}
+
+type Event struct {
+	Type       int
+	Char       rune
+	MouseEvent *MouseEvent
+}
+
+type MouseEvent struct {
+	Y      int
+	X      int
+	S      int
+	Down   bool
+	Double bool
+	Mod    bool
+}
+
+var (
+	_buf          []byte
+	_in           *os.File
+	_color        func(int, bool) C.int
+	_colorMap     map[int]int
+	_prevDownTime time.Time
+	_clickY       []int
+	_screen       *C.SCREEN
+	Default16     *ColorTheme
+	Dark256       *ColorTheme
+	Light256      *ColorTheme
+	FG            int
+	CurrentFG     int
+	BG            int
+	DarkBG        int
+)
+
+func init() {
+	_prevDownTime = time.Unix(0, 0)
+	_clickY = []int{}
+	_colorMap = make(map[int]int)
+	Default16 = &ColorTheme{
+		UseDefault:   true,
+		Fg:           15,
+		Bg:           0,
+		DarkBg:       C.COLOR_BLACK,
+		Prompt:       C.COLOR_BLUE,
+		Match:        C.COLOR_GREEN,
+		Current:      C.COLOR_YELLOW,
+		CurrentMatch: C.COLOR_GREEN,
+		Spinner:      C.COLOR_GREEN,
+		Info:         C.COLOR_WHITE,
+		Cursor:       C.COLOR_RED,
+		Selected:     C.COLOR_MAGENTA,
+		Header:       C.COLOR_CYAN}
+	Dark256 = &ColorTheme{
+		UseDefault:   true,
+		Fg:           15,
+		Bg:           0,
+		DarkBg:       236,
+		Prompt:       110,
+		Match:        108,
+		Current:      254,
+		CurrentMatch: 151,
+		Spinner:      148,
+		Info:         144,
+		Cursor:       161,
+		Selected:     168,
+		Header:       109}
+	Light256 = &ColorTheme{
+		UseDefault:   true,
+		Fg:           15,
+		Bg:           0,
+		DarkBg:       251,
+		Prompt:       25,
+		Match:        66,
+		Current:      237,
+		CurrentMatch: 23,
+		Spinner:      65,
+		Info:         101,
+		Cursor:       161,
+		Selected:     168,
+		Header:       31}
+}
+
+func attrColored(pair int, bold bool) C.int {
+	var attr C.int
+	if pair > ColNormal {
+		attr = C.COLOR_PAIR(C.int(pair))
+	}
+	if bold {
+		attr = attr | C.A_BOLD
+	}
+	return attr
+}
+
+func attrMono(pair int, bold bool) C.int {
+	var attr C.int
+	switch pair {
+	case ColCurrent:
+		if bold {
+			attr = C.A_REVERSE
+		}
+	case ColMatch:
+		attr = C.A_UNDERLINE
+	case ColCurrentMatch:
+		attr = C.A_UNDERLINE | C.A_REVERSE
+	}
+	if bold {
+		attr = attr | C.A_BOLD
+	}
+	return attr
+}
+
+func MaxX() int {
+	return int(C.COLS)
+}
+
+func MaxY() int {
+	return int(C.LINES)
+}
+
+func getch(nonblock bool) int {
+	b := make([]byte, 1)
+	syscall.SetNonblock(int(_in.Fd()), nonblock)
+	_, err := _in.Read(b)
+	if err != nil {
+		return -1
+	}
+	return int(b[0])
+}
+
+func Init(theme *ColorTheme, black bool, mouse bool) {
+	{
+		in, err := os.OpenFile("/dev/tty", syscall.O_RDONLY, 0)
+		if err != nil {
+			panic("Failed to open /dev/tty")
+		}
+		_in = in
+		// Break STDIN
+		// syscall.Dup2(int(in.Fd()), int(os.Stdin.Fd()))
+	}
+
+	C.setlocale(C.LC_ALL, C.CString(""))
+	_screen = C.newterm(nil, C.stderr, C.stdin)
+	C.set_term(_screen)
+	if mouse {
+		C.mousemask(C.ALL_MOUSE_EVENTS, nil)
+	}
+	C.noecho()
+	C.raw() // stty dsusp undef
+
+	intChan := make(chan os.Signal, 1)
+	signal.Notify(intChan, os.Interrupt, os.Kill)
+	go func() {
+		<-intChan
+		Close()
+		os.Exit(1)
+	}()
+
+	if theme != nil {
+		C.start_color()
+		initPairs(theme, black)
+		_color = attrColored
+	} else {
+		_color = attrMono
+	}
+}
+
+func initPairs(theme *ColorTheme, black bool) {
+	fg := C.short(theme.Fg)
+	bg := C.short(theme.Bg)
+	if black {
+		bg = C.COLOR_BLACK
+	} else if theme.UseDefault {
+		fg = -1
+		bg = -1
+		C.use_default_colors()
+	}
+	if theme.UseDefault {
+		FG = -1
+		BG = -1
+	} else {
+		FG = int(fg)
+		BG = int(bg)
+		C.assume_default_colors(C.int(theme.Fg), C.int(bg))
+	}
+
+	CurrentFG = int(theme.Current)
+	DarkBG = int(theme.DarkBg)
+	darkBG := C.short(DarkBG)
+	C.init_pair(ColPrompt, C.short(theme.Prompt), bg)
+	C.init_pair(ColMatch, C.short(theme.Match), bg)
+	C.init_pair(ColCurrent, C.short(theme.Current), darkBG)
+	C.init_pair(ColCurrentMatch, C.short(theme.CurrentMatch), darkBG)
+	C.init_pair(ColSpinner, C.short(theme.Spinner), bg)
+	C.init_pair(ColInfo, C.short(theme.Info), bg)
+	C.init_pair(ColCursor, C.short(theme.Cursor), darkBG)
+	C.init_pair(ColSelected, C.short(theme.Selected), darkBG)
+	C.init_pair(ColHeader, C.short(theme.Header), bg)
+}
+
+func Close() {
+	C.endwin()
+	C.delscreen(_screen)
+}
+
+func GetBytes() []byte {
+	c := getch(false)
+	_buf = append(_buf, byte(c))
+
+	for {
+		c = getch(true)
+		if c == -1 {
+			break
+		}
+		_buf = append(_buf, byte(c))
+	}
+
+	return _buf
+}
+
+// 27 (91 79) 77 type x y
+func mouseSequence(sz *int) Event {
+	if len(_buf) < 6 {
+		return Event{Invalid, 0, nil}
+	}
+	*sz = 6
+	switch _buf[3] {
+	case 32, 36, 40, 48, // mouse-down / shift / cmd / ctrl
+		35, 39, 43, 51: // mouse-up / shift / cmd / ctrl
+		mod := _buf[3] >= 36
+		down := _buf[3]%2 == 0
+		x := int(_buf[4] - 33)
+		y := int(_buf[5] - 33)
+		double := false
+		if down {
+			now := time.Now()
+			if now.Sub(_prevDownTime) < doubleClickDuration {
+				_clickY = append(_clickY, y)
+			} else {
+				_clickY = []int{y}
+			}
+			_prevDownTime = now
+		} else {
+			if len(_clickY) > 1 && _clickY[0] == _clickY[1] &&
+				time.Now().Sub(_prevDownTime) < doubleClickDuration {
+				double = true
+			}
+		}
+		return Event{Mouse, 0, &MouseEvent{y, x, 0, down, double, mod}}
+	case 96, 100, 104, 112, // scroll-up / shift / cmd / ctrl
+		97, 101, 105, 113: // scroll-down / shift / cmd / ctrl
+		mod := _buf[3] >= 100
+		s := 1 - int(_buf[3]%2)*2
+		return Event{Mouse, 0, &MouseEvent{0, 0, s, false, false, mod}}
+	}
+	return Event{Invalid, 0, nil}
+}
+
+func escSequence(sz *int) Event {
+	if len(_buf) < 2 {
+		return Event{ESC, 0, nil}
+	}
+	*sz = 2
+	switch _buf[1] {
+	case 98:
+		return Event{AltB, 0, nil}
+	case 100:
+		return Event{AltD, 0, nil}
+	case 102:
+		return Event{AltF, 0, nil}
+	case 127:
+		return Event{AltBS, 0, nil}
+	case 91, 79:
+		if len(_buf) < 3 {
+			return Event{Invalid, 0, nil}
+		}
+		*sz = 3
+		switch _buf[2] {
+		case 68:
+			return Event{Left, 0, nil}
+		case 67:
+			return Event{Right, 0, nil}
+		case 66:
+			return Event{Down, 0, nil}
+		case 65:
+			return Event{Up, 0, nil}
+		case 90:
+			return Event{BTab, 0, nil}
+		case 72:
+			return Event{Home, 0, nil}
+		case 70:
+			return Event{End, 0, nil}
+		case 77:
+			return mouseSequence(sz)
+		case 80:
+			return Event{F1, 0, nil}
+		case 81:
+			return Event{F2, 0, nil}
+		case 82:
+			return Event{F3, 0, nil}
+		case 83:
+			return Event{F4, 0, nil}
+		case 49, 50, 51, 52, 53, 54:
+			if len(_buf) < 4 {
+				return Event{Invalid, 0, nil}
+			}
+			*sz = 4
+			switch _buf[2] {
+			case 50:
+				return Event{Invalid, 0, nil} // INS
+			case 51:
+				return Event{Del, 0, nil}
+			case 52:
+				return Event{End, 0, nil}
+			case 53:
+				return Event{PgUp, 0, nil}
+			case 54:
+				return Event{PgDn, 0, nil}
+			case 49:
+				switch _buf[3] {
+				case 126:
+					return Event{Home, 0, nil}
+				case 59:
+					if len(_buf) != 6 {
+						return Event{Invalid, 0, nil}
+					}
+					*sz = 6
+					switch _buf[4] {
+					case 50:
+						switch _buf[5] {
+						case 68:
+							return Event{Home, 0, nil}
+						case 67:
+							return Event{End, 0, nil}
+						}
+					case 53:
+						switch _buf[5] {
+						case 68:
+							return Event{SLeft, 0, nil}
+						case 67:
+							return Event{SRight, 0, nil}
+						}
+					} // _buf[4]
+				} // _buf[3]
+			} // _buf[2]
+		} // _buf[2]
+	} // _buf[1]
+	if _buf[1] >= 'a' && _buf[1] <= 'z' {
+		return Event{AltA + int(_buf[1]) - 'a', 0, nil}
+	}
+	return Event{Invalid, 0, nil}
+}
+
+func GetChar() Event {
+	if len(_buf) == 0 {
+		_buf = GetBytes()
+	}
+	if len(_buf) == 0 {
+		panic("Empty _buffer")
+	}
+
+	sz := 1
+	defer func() {
+		_buf = _buf[sz:]
+	}()
+
+	switch _buf[0] {
+	case CtrlC:
+		return Event{CtrlC, 0, nil}
+	case CtrlG:
+		return Event{CtrlG, 0, nil}
+	case CtrlQ:
+		return Event{CtrlQ, 0, nil}
+	case 127:
+		return Event{BSpace, 0, nil}
+	case ESC:
+		return escSequence(&sz)
+	}
+
+	// CTRL-A ~ CTRL-Z
+	if _buf[0] <= CtrlZ {
+		return Event{int(_buf[0]), 0, nil}
+	}
+	r, rsz := utf8.DecodeRune(_buf)
+	if r == utf8.RuneError {
+		return Event{ESC, 0, nil}
+	}
+	sz = rsz
+	return Event{Rune, r, nil}
+}
+
+func Move(y int, x int) {
+	C.move(C.int(y), C.int(x))
+}
+
+func MoveAndClear(y int, x int) {
+	Move(y, x)
+	C.clrtoeol()
+}
+
+func Print(text string) {
+	C.addstr(C.CString(text))
+}
+
+func CPrint(pair int, bold bool, text string) {
+	attr := _color(pair, bold)
+	C.attron(attr)
+	Print(text)
+	C.attroff(attr)
+}
+
+func Clear() {
+	C.clear()
+}
+
+func Endwin() {
+	C.endwin()
+}
+
+func Refresh() {
+	C.refresh()
+}
+
+func PairFor(fg int, bg int) int {
+	key := (fg << 8) + bg
+	if found, prs := _colorMap[key]; prs {
+		return found
+	}
+
+	id := len(_colorMap) + ColUser
+	C.init_pair(C.short(id), C.short(fg), C.short(bg))
+	_colorMap[key] = id
+	return id
+}

src/curses/curses_test.go

@@ -0,0 +1,14 @@
+package curses
+
+import (
+	"testing"
+)
+
+func TestPairFor(t *testing.T) {
+	if PairFor(30, 50) != PairFor(30, 50) {
+		t.Fail()
+	}
+	if PairFor(-1, 10) != PairFor(-1, 10) {
+		t.Fail()
+	}
+}

src/fzf/main.go

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

src/history.go

@@ -0,0 +1,94 @@
+package fzf
+
+import (
+	"errors"
+	"io/ioutil"
+	"os"
+	"strings"
+)
+
+type History struct {
+	path     string
+	lines    []string
+	modified map[int]string
+	maxSize  int
+	cursor   int
+}
+
+func NewHistory(path string, maxSize int) (*History, error) {
+	fmtError := func(e error) error {
+		if os.IsPermission(e) {
+			return errors.New("permission denied: " + path)
+		}
+		return errors.New("invalid history file: " + e.Error())
+	}
+
+	// Read history file
+	data, err := ioutil.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 {
+				return nil, fmtError(err)
+			}
+		} else {
+			return nil, fmtError(err)
+		}
+	}
+	// Split lines and limit the maximum number of lines
+	lines := strings.Split(strings.Trim(string(data), "\n"), "\n")
+	if len(lines[len(lines)-1]) > 0 {
+		lines = append(lines, "")
+	}
+	return &History{
+		path:     path,
+		maxSize:  maxSize,
+		lines:    lines,
+		modified: make(map[int]string),
+		cursor:   len(lines) - 1}, nil
+}
+
+func (h *History) append(line string) error {
+	// We don't append empty lines
+	if len(line) == 0 {
+		return nil
+	}
+
+	lines := append(h.lines[:len(h.lines)-1], line)
+	if len(lines) > h.maxSize {
+		lines = lines[len(lines)-h.maxSize : len(lines)]
+	}
+	h.lines = append(lines, "")
+	return ioutil.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
+	if h.cursor == len(h.lines)-1 {
+		h.lines[h.cursor] = str
+	} else if h.cursor < len(h.lines)-1 {
+		h.modified[h.cursor] = str
+	}
+}
+
+func (h *History) current() string {
+	if str, prs := h.modified[h.cursor]; prs {
+		return str
+	}
+	return h.lines[h.cursor]
+}
+
+func (h *History) previous() string {
+	if h.cursor > 0 {
+		h.cursor--
+	}
+	return h.current()
+}
+
+func (h *History) next() string {
+	if h.cursor < len(h.lines)-1 {
+		h.cursor++
+	}
+	return h.current()
+}

src/history_test.go

@@ -0,0 +1,59 @@
+package fzf
+
+import (
+	"os/user"
+	"testing"
+)
+
+func TestHistory(t *testing.T) {
+	maxHistory := 50
+
+	// Invalid arguments
+	user, _ := user.Current()
+	paths := []string{"/etc", "/proc"}
+	if user.Name != "root" {
+		paths = append(paths, "/etc/sudoers")
+	}
+	for _, path := range paths {
+		if _, e := NewHistory(path, maxHistory); e == nil {
+			t.Error("Error expected for: " + path)
+		}
+	}
+	{ // Append lines
+		h, _ := NewHistory("/tmp/fzf-history", maxHistory)
+		for i := 0; i < maxHistory+10; i++ {
+			h.append("foobar")
+		}
+	}
+	{ // Read lines
+		h, _ := NewHistory("/tmp/fzf-history", maxHistory)
+		if len(h.lines) != maxHistory+1 {
+			t.Errorf("Expected: %d, actual: %d\n", maxHistory+1, len(h.lines))
+		}
+		for i := 0; i < maxHistory; i++ {
+			if h.lines[i] != "foobar" {
+				t.Error("Expected: foobar, actual: " + h.lines[i])
+			}
+		}
+	}
+	{ // Append lines
+		h, _ := NewHistory("/tmp/fzf-history", maxHistory)
+		h.append("barfoo")
+		h.append("")
+		h.append("foobarbaz")
+	}
+	{ // Read lines again
+		h, _ := NewHistory("/tmp/fzf-history", maxHistory)
+		if len(h.lines) != maxHistory+1 {
+			t.Errorf("Expected: %d, actual: %d\n", maxHistory+1, len(h.lines))
+		}
+		compare := func(idx int, exp string) {
+			if h.lines[idx] != exp {
+				t.Errorf("Expected: %s, actual: %s\n", exp, h.lines[idx])
+			}
+		}
+		compare(maxHistory-3, "foobar")
+		compare(maxHistory-2, "barfoo")
+		compare(maxHistory-1, "foobarbaz")
+	}
+}

src/item.go

@@ -0,0 +1,252 @@
+package fzf
+
+import (
+	"math"
+
+	"github.com/junegunn/fzf/src/curses"
+)
+
+// Offset holds two 32-bit integers denoting the offsets of a matched substring
+type Offset [2]int32
+
+type colorOffset struct {
+	offset [2]int32
+	color  int
+	bold   bool
+}
+
+// Item represents each input line
+type Item struct {
+	text        *string
+	origText    *string
+	transformed *[]Token
+	index       uint32
+	offsets     []Offset
+	colors      []ansiOffset
+	rank        Rank
+}
+
+// Rank is used to sort the search result
+type Rank struct {
+	matchlen uint16
+	tiebreak uint16
+	index    uint32
+}
+
+// Tiebreak criterion to use. Never changes once fzf is started.
+var rankTiebreak tiebreak
+
+// Rank calculates rank of the Item
+func (i *Item) Rank(cache bool) Rank {
+	if cache && (i.rank.matchlen > 0 || i.rank.tiebreak > 0) {
+		return i.rank
+	}
+	matchlen := 0
+	prevEnd := 0
+	minBegin := math.MaxUint16
+	for _, offset := range i.offsets {
+		begin := int(offset[0])
+		end := int(offset[1])
+		if prevEnd > begin {
+			begin = prevEnd
+		}
+		if end > prevEnd {
+			prevEnd = end
+		}
+		if end > begin {
+			if begin < minBegin {
+				minBegin = begin
+			}
+			matchlen += end - begin
+		}
+	}
+	var tiebreak uint16
+	switch rankTiebreak {
+	case byLength:
+		tiebreak = uint16(len(*i.text))
+	case byBegin:
+		// We can't just look at i.offsets[0][0] because it can be an inverse term
+		tiebreak = uint16(minBegin)
+	case byEnd:
+		if prevEnd > 0 {
+			tiebreak = uint16(1 + len(*i.text) - prevEnd)
+		} else {
+			// Empty offsets due to inverse terms.
+			tiebreak = 1
+		}
+	case byIndex:
+		tiebreak = 1
+	}
+	rank := Rank{uint16(matchlen), tiebreak, i.index}
+	if cache {
+		i.rank = rank
+	}
+	return rank
+}
+
+// AsString returns the original string
+func (i *Item) AsString() string {
+	return *i.StringPtr()
+}
+
+// StringPtr returns the pointer to the original string
+func (i *Item) StringPtr() *string {
+	if i.origText != nil {
+		return i.origText
+	}
+	return i.text
+}
+
+func (item *Item) colorOffsets(color int, bold bool, current bool) []colorOffset {
+	if len(item.colors) == 0 {
+		var offsets []colorOffset
+		for _, off := range item.offsets {
+			offsets = append(offsets, colorOffset{offset: off, color: color, bold: bold})
+		}
+		return offsets
+	}
+
+	// Find max column
+	var maxCol int32
+	for _, off := range item.offsets {
+		if off[1] > maxCol {
+			maxCol = off[1]
+		}
+	}
+	for _, ansi := range item.colors {
+		if ansi.offset[1] > maxCol {
+			maxCol = ansi.offset[1]
+		}
+	}
+	cols := make([]int, maxCol)
+
+	for colorIndex, ansi := range item.colors {
+		for i := ansi.offset[0]; i < ansi.offset[1]; i++ {
+			cols[i] = colorIndex + 1 // XXX
+		}
+	}
+
+	for _, off := range item.offsets {
+		for i := off[0]; i < off[1]; i++ {
+			cols[i] = -1
+		}
+	}
+
+	// sort.Sort(ByOrder(offsets))
+
+	// Merge offsets
+	// ------------  ----  --  ----
+	//   ++++++++      ++++++++++
+	// --++++++++--  --++++++++++---
+	curr := 0
+	start := 0
+	var offsets []colorOffset
+	add := func(idx int) {
+		if curr != 0 && idx > start {
+			if curr == -1 {
+				offsets = append(offsets, colorOffset{
+					offset: Offset{int32(start), int32(idx)}, color: color, bold: bold})
+			} else {
+				ansi := item.colors[curr-1]
+				fg := ansi.color.fg
+				if fg == -1 {
+					if current {
+						fg = curses.CurrentFG
+					} else {
+						fg = curses.FG
+					}
+				}
+				bg := ansi.color.bg
+				if bg == -1 {
+					if current {
+						bg = curses.DarkBG
+					} else {
+						bg = curses.BG
+					}
+				}
+				offsets = append(offsets, colorOffset{
+					offset: Offset{int32(start), int32(idx)},
+					color:  curses.PairFor(fg, bg),
+					bold:   ansi.color.bold || bold})
+			}
+		}
+	}
+	for idx, col := range cols {
+		if col != curr {
+			add(idx)
+			start = idx
+			curr = col
+		}
+	}
+	add(int(maxCol))
+	return offsets
+}
+
+// ByOrder is for sorting substring offsets
+type ByOrder []Offset
+
+func (a ByOrder) Len() int {
+	return len(a)
+}
+
+func (a ByOrder) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a ByOrder) Less(i, j int) bool {
+	ioff := a[i]
+	joff := a[j]
+	return (ioff[0] < joff[0]) || (ioff[0] == joff[0]) && (ioff[1] <= joff[1])
+}
+
+// ByRelevance is for sorting Items
+type ByRelevance []*Item
+
+func (a ByRelevance) Len() int {
+	return len(a)
+}
+
+func (a ByRelevance) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a ByRelevance) Less(i, j int) bool {
+	irank := a[i].Rank(true)
+	jrank := a[j].Rank(true)
+
+	return compareRanks(irank, jrank, false)
+}
+
+// ByRelevanceTac is for sorting Items
+type ByRelevanceTac []*Item
+
+func (a ByRelevanceTac) Len() int {
+	return len(a)
+}
+
+func (a ByRelevanceTac) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a ByRelevanceTac) Less(i, j int) bool {
+	irank := a[i].Rank(true)
+	jrank := a[j].Rank(true)
+
+	return compareRanks(irank, jrank, true)
+}
+
+func compareRanks(irank Rank, jrank Rank, tac bool) bool {
+	if irank.matchlen < jrank.matchlen {
+		return true
+	} else if irank.matchlen > jrank.matchlen {
+		return false
+	}
+
+	if irank.tiebreak < jrank.tiebreak {
+		return true
+	} else if irank.tiebreak > jrank.tiebreak {
+		return false
+	}
+
+	return (irank.index <= jrank.index) != tac
+}

src/item_test.go

@@ -0,0 +1,104 @@
+package fzf
+
+import (
+	"sort"
+	"testing"
+
+	"github.com/junegunn/fzf/src/curses"
+)
+
+func TestOffsetSort(t *testing.T) {
+	offsets := []Offset{
+		Offset{3, 5}, Offset{2, 7},
+		Offset{1, 3}, Offset{2, 9}}
+	sort.Sort(ByOrder(offsets))
+
+	if offsets[0][0] != 1 || offsets[0][1] != 3 ||
+		offsets[1][0] != 2 || offsets[1][1] != 7 ||
+		offsets[2][0] != 2 || offsets[2][1] != 9 ||
+		offsets[3][0] != 3 || offsets[3][1] != 5 {
+		t.Error("Invalid order:", offsets)
+	}
+}
+
+func TestRankComparison(t *testing.T) {
+	if compareRanks(Rank{3, 0, 5}, Rank{2, 0, 7}, false) ||
+		!compareRanks(Rank{3, 0, 5}, Rank{3, 0, 6}, false) ||
+		!compareRanks(Rank{1, 2, 3}, Rank{1, 3, 2}, false) ||
+		!compareRanks(Rank{0, 0, 0}, Rank{0, 0, 0}, false) {
+		t.Error("Invalid order")
+	}
+
+	if compareRanks(Rank{3, 0, 5}, Rank{2, 0, 7}, true) ||
+		!compareRanks(Rank{3, 0, 5}, Rank{3, 0, 6}, false) ||
+		!compareRanks(Rank{1, 2, 3}, Rank{1, 3, 2}, true) ||
+		!compareRanks(Rank{0, 0, 0}, Rank{0, 0, 0}, false) {
+		t.Error("Invalid order (tac)")
+	}
+}
+
+// Match length, string length, index
+func TestItemRank(t *testing.T) {
+	strs := []string{"foo", "foobar", "bar", "baz"}
+	item1 := Item{text: &strs[0], index: 1, offsets: []Offset{}}
+	rank1 := item1.Rank(true)
+	if rank1.matchlen != 0 || rank1.tiebreak != 3 || rank1.index != 1 {
+		t.Error(item1.Rank(true))
+	}
+	// Only differ in index
+	item2 := Item{text: &strs[0], index: 0, offsets: []Offset{}}
+
+	items := []*Item{&item1, &item2}
+	sort.Sort(ByRelevance(items))
+	if items[0] != &item2 || items[1] != &item1 {
+		t.Error(items)
+	}
+
+	items = []*Item{&item2, &item1, &item1, &item2}
+	sort.Sort(ByRelevance(items))
+	if items[0] != &item2 || items[1] != &item2 ||
+		items[2] != &item1 || items[3] != &item1 {
+		t.Error(items)
+	}
+
+	// Sort by relevance
+	item3 := Item{text: &strs[1], rank: Rank{0, 0, 2}, offsets: []Offset{Offset{1, 3}, Offset{5, 7}}}
+	item4 := Item{text: &strs[1], rank: Rank{0, 0, 2}, offsets: []Offset{Offset{1, 2}, Offset{6, 7}}}
+	item5 := Item{text: &strs[2], rank: Rank{0, 0, 2}, offsets: []Offset{Offset{1, 3}, Offset{5, 7}}}
+	item6 := Item{text: &strs[2], rank: Rank{0, 0, 2}, offsets: []Offset{Offset{1, 2}, Offset{6, 7}}}
+	items = []*Item{&item1, &item2, &item3, &item4, &item5, &item6}
+	sort.Sort(ByRelevance(items))
+	if items[0] != &item2 || items[1] != &item1 ||
+		items[2] != &item6 || items[3] != &item4 ||
+		items[4] != &item5 || items[5] != &item3 {
+		t.Error(items)
+	}
+}
+
+func TestColorOffset(t *testing.T) {
+	// ------------ 20 ----  --  ----
+	//   ++++++++        ++++++++++
+	// --++++++++--    --++++++++++---
+	item := Item{
+		offsets: []Offset{Offset{5, 15}, Offset{25, 35}},
+		colors: []ansiOffset{
+			ansiOffset{[2]int32{0, 20}, ansiState{1, 5, false}},
+			ansiOffset{[2]int32{22, 27}, ansiState{2, 6, true}},
+			ansiOffset{[2]int32{30, 32}, ansiState{3, 7, false}},
+			ansiOffset{[2]int32{33, 40}, ansiState{4, 8, true}}}}
+	// [{[0 5] 9 false} {[5 15] 99 false} {[15 20] 9 false} {[22 25] 10 true} {[25 35] 99 false} {[35 40] 11 true}]
+
+	offsets := item.colorOffsets(99, false, true)
+	assert := func(idx int, b int32, e int32, c int, bold bool) {
+		o := offsets[idx]
+		if o.offset[0] != b || o.offset[1] != e || o.color != c || o.bold != bold {
+			t.Error(o)
+		}
+	}
+	assert(0, 0, 5, curses.ColUser, false)
+	assert(1, 5, 15, 99, false)
+	assert(2, 15, 20, curses.ColUser, false)
+	assert(3, 22, 25, curses.ColUser+1, true)
+	assert(4, 25, 35, 99, false)
+	assert(5, 35, 40, curses.ColUser+2, true)
+}

src/matcher.go

@@ -0,0 +1,221 @@
+package fzf
+
+import (
+	"fmt"
+	"runtime"
+	"sort"
+	"sync"
+	"time"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+// MatchRequest represents a search request
+type MatchRequest struct {
+	chunks  []*Chunk
+	pattern *Pattern
+	final   bool
+	sort    bool
+}
+
+// Matcher is responsible for performing search
+type Matcher struct {
+	patternBuilder func([]rune) *Pattern
+	sort           bool
+	tac            bool
+	eventBox       *util.EventBox
+	reqBox         *util.EventBox
+	partitions     int
+	mergerCache    map[string]*Merger
+}
+
+const (
+	reqRetry util.EventType = iota
+	reqReset
+)
+
+// NewMatcher returns a new Matcher
+func NewMatcher(patternBuilder func([]rune) *Pattern,
+	sort bool, tac bool, eventBox *util.EventBox) *Matcher {
+	return &Matcher{
+		patternBuilder: patternBuilder,
+		sort:           sort,
+		tac:            tac,
+		eventBox:       eventBox,
+		reqBox:         util.NewEventBox(),
+		partitions:     runtime.NumCPU(),
+		mergerCache:    make(map[string]*Merger)}
+}
+
+// Loop puts Matcher in action
+func (m *Matcher) Loop() {
+	prevCount := 0
+
+	for {
+		var request MatchRequest
+
+		m.reqBox.Wait(func(events *util.Events) {
+			for _, val := range *events {
+				switch val := val.(type) {
+				case MatchRequest:
+					request = val
+				default:
+					panic(fmt.Sprintf("Unexpected type: %T", val))
+				}
+			}
+			events.Clear()
+		})
+
+		if request.sort != m.sort {
+			m.sort = request.sort
+			m.mergerCache = make(map[string]*Merger)
+			clearChunkCache()
+		}
+
+		// Restart search
+		patternString := request.pattern.AsString()
+		var merger *Merger
+		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
+			}
+		} else {
+			// Invalidate mergerCache
+			prevCount = count
+			m.mergerCache = make(map[string]*Merger)
+		}
+
+		if !foundCache {
+			merger, cancelled = m.scan(request)
+		}
+
+		if !cancelled {
+			if merger.Cacheable() {
+				m.mergerCache[patternString] = merger
+			}
+			merger.final = request.final
+			m.eventBox.Set(EvtSearchFin, merger)
+		}
+	}
+}
+
+func (m *Matcher) sliceChunks(chunks []*Chunk) [][]*Chunk {
+	perSlice := len(chunks) / m.partitions
+
+	// No need to parallelize
+	if perSlice == 0 {
+		return [][]*Chunk{chunks}
+	}
+
+	slices := make([][]*Chunk, m.partitions)
+	for i := 0; i < m.partitions; i++ {
+		start := i * perSlice
+		end := start + perSlice
+		if i == m.partitions-1 {
+			end = len(chunks)
+		}
+		slices[i] = chunks[start:end]
+	}
+	return slices
+}
+
+type partialResult struct {
+	index   int
+	matches []*Item
+}
+
+func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
+	startedAt := time.Now()
+
+	numChunks := len(request.chunks)
+	if numChunks == 0 {
+		return EmptyMerger, false
+	}
+	pattern := request.pattern
+	if pattern.IsEmpty() {
+		return PassMerger(&request.chunks, m.tac), false
+	}
+
+	cancelled := util.NewAtomicBool(false)
+
+	slices := m.sliceChunks(request.chunks)
+	numSlices := len(slices)
+	resultChan := make(chan partialResult, numSlices)
+	countChan := make(chan int, numChunks)
+	waitGroup := sync.WaitGroup{}
+
+	for idx, chunks := range slices {
+		waitGroup.Add(1)
+		go func(idx int, chunks []*Chunk) {
+			defer func() { waitGroup.Done() }()
+			sliceMatches := []*Item{}
+			for _, chunk := range chunks {
+				matches := request.pattern.Match(chunk)
+				sliceMatches = append(sliceMatches, matches...)
+				if cancelled.Get() {
+					return
+				}
+				countChan <- len(matches)
+			}
+			if m.sort {
+				if m.tac {
+					sort.Sort(ByRelevanceTac(sliceMatches))
+				} else {
+					sort.Sort(ByRelevance(sliceMatches))
+				}
+			}
+			resultChan <- partialResult{idx, sliceMatches}
+		}(idx, chunks)
+	}
+
+	wait := func() bool {
+		cancelled.Set(true)
+		waitGroup.Wait()
+		return true
+	}
+
+	count := 0
+	matchCount := 0
+	for matchesInChunk := range countChan {
+		count++
+		matchCount += matchesInChunk
+
+		if count == numChunks {
+			break
+		}
+
+		if m.reqBox.Peek(reqReset) {
+			return nil, wait()
+		}
+
+		if time.Now().Sub(startedAt) > progressMinDuration {
+			m.eventBox.Set(EvtSearchProgress, float32(count)/float32(numChunks))
+		}
+	}
+
+	partialResults := make([][]*Item, numSlices)
+	for range slices {
+		partialResult := <-resultChan
+		partialResults[partialResult.index] = partialResult.matches
+	}
+	return NewMerger(partialResults, m.sort, m.tac), false
+}
+
+// Reset is called to interrupt/signal the ongoing search
+func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final bool, sort bool) {
+	pattern := m.patternBuilder(patternRunes)
+
+	var event util.EventType
+	if cancel {
+		event = reqReset
+	} else {
+		event = reqRetry
+	}
+	m.reqBox.Set(event, MatchRequest{chunks, pattern, final, sort})
+}

src/merger.go

@@ -0,0 +1,118 @@
+package fzf
+
+import "fmt"
+
+// Merger with no data
+var EmptyMerger = NewMerger([][]*Item{}, false, false)
+
+// Merger holds a set of locally sorted lists of items and provides the view of
+// a single, globally-sorted list
+type Merger struct {
+	lists   [][]*Item
+	merged  []*Item
+	chunks  *[]*Chunk
+	cursors []int
+	sorted  bool
+	tac     bool
+	final   bool
+	count   int
+}
+
+// PassMerger returns a new Merger that simply returns the items in the
+// original order
+func PassMerger(chunks *[]*Chunk, tac bool) *Merger {
+	mg := Merger{
+		chunks: chunks,
+		tac:    tac,
+		count:  0}
+
+	for _, chunk := range *mg.chunks {
+		mg.count += len(*chunk)
+	}
+	return &mg
+}
+
+// NewMerger returns a new Merger
+func NewMerger(lists [][]*Item, sorted bool, tac bool) *Merger {
+	mg := Merger{
+		lists:   lists,
+		merged:  []*Item{},
+		chunks:  nil,
+		cursors: make([]int, len(lists)),
+		sorted:  sorted,
+		tac:     tac,
+		final:   false,
+		count:   0}
+
+	for _, list := range mg.lists {
+		mg.count += len(list)
+	}
+	return &mg
+}
+
+// Length returns the number of items
+func (mg *Merger) Length() int {
+	return mg.count
+}
+
+// Get returns the pointer to the Item object indexed by the given integer
+func (mg *Merger) Get(idx int) *Item {
+	if mg.chunks != nil {
+		if mg.tac {
+			idx = mg.count - idx - 1
+		}
+		chunk := (*mg.chunks)[idx/chunkSize]
+		return (*chunk)[idx%chunkSize]
+	}
+
+	if mg.sorted {
+		return mg.mergedGet(idx)
+	}
+
+	if mg.tac {
+		idx = mg.count - idx - 1
+	}
+	for _, list := range mg.lists {
+		numItems := len(list)
+		if idx < numItems {
+			return list[idx]
+		}
+		idx -= numItems
+	}
+	panic(fmt.Sprintf("Index out of bounds (unsorted, %d/%d)", idx, mg.count))
+}
+
+func (mg *Merger) Cacheable() bool {
+	return mg.count < mergerCacheMax
+}
+
+func (mg *Merger) mergedGet(idx int) *Item {
+	for i := len(mg.merged); i <= idx; i++ {
+		minRank := Rank{0, 0, 0}
+		minIdx := -1
+		for listIdx, list := range mg.lists {
+			cursor := mg.cursors[listIdx]
+			if cursor < 0 || cursor == len(list) {
+				mg.cursors[listIdx] = -1
+				continue
+			}
+			if cursor >= 0 {
+				rank := list[cursor].Rank(false)
+				if minIdx < 0 || compareRanks(rank, minRank, mg.tac) {
+					minRank = rank
+					minIdx = listIdx
+				}
+			}
+			mg.cursors[listIdx] = cursor
+		}
+
+		if minIdx >= 0 {
+			chosen := mg.lists[minIdx]
+			mg.merged = append(mg.merged, chosen[mg.cursors[minIdx]])
+			mg.cursors[minIdx]++
+		} else {
+			panic(fmt.Sprintf("Index out of bounds (sorted, %d/%d)", i, mg.count))
+		}
+	}
+	return mg.merged[idx]
+}

src/merger_test.go

@@ -0,0 +1,93 @@
+package fzf
+
+import (
+	"fmt"
+	"math/rand"
+	"sort"
+	"testing"
+)
+
+func assert(t *testing.T, cond bool, msg ...string) {
+	if !cond {
+		t.Error(msg)
+	}
+}
+
+func randItem() *Item {
+	str := fmt.Sprintf("%d", rand.Uint32())
+	offsets := make([]Offset, rand.Int()%3)
+	for idx := range offsets {
+		sidx := int32(rand.Uint32() % 20)
+		eidx := sidx + int32(rand.Uint32()%20)
+		offsets[idx] = Offset{sidx, eidx}
+	}
+	return &Item{
+		text:    &str,
+		index:   rand.Uint32(),
+		offsets: offsets}
+}
+
+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")
+}
+
+func buildLists(partiallySorted bool) ([][]*Item, []*Item) {
+	numLists := 4
+	lists := make([][]*Item, numLists)
+	cnt := 0
+	for i := 0; i < numLists; i++ {
+		numItems := rand.Int() % 20
+		cnt += numItems
+		lists[i] = make([]*Item, numItems)
+		for j := 0; j < numItems; j++ {
+			item := randItem()
+			lists[i][j] = item
+		}
+		if partiallySorted {
+			sort.Sort(ByRelevance(lists[i]))
+		}
+	}
+	items := []*Item{}
+	for _, list := range lists {
+		items = append(items, list...)
+	}
+	return lists, items
+}
+
+func TestMergerUnsorted(t *testing.T) {
+	lists, items := buildLists(false)
+	cnt := len(items)
+
+	// Not sorted: same order
+	mg := NewMerger(lists, false, false)
+	assert(t, cnt == mg.Length(), "Invalid Length")
+	for i := 0; i < cnt; i++ {
+		assert(t, items[i] == mg.Get(i), "Invalid Get")
+	}
+}
+
+func TestMergerSorted(t *testing.T) {
+	lists, items := buildLists(true)
+	cnt := len(items)
+
+	// Sorted sorted order
+	mg := NewMerger(lists, true, false)
+	assert(t, cnt == mg.Length(), "Invalid Length")
+	sort.Sort(ByRelevance(items))
+	for i := 0; i < cnt; i++ {
+		if items[i] != mg.Get(i) {
+			t.Error("Not sorted", items[i], mg.Get(i))
+		}
+	}
+
+	// Inverse order
+	mg2 := NewMerger(lists, true, false)
+	for i := cnt - 1; i >= 0; i-- {
+		if items[i] != mg2.Get(i) {
+			t.Error("Not sorted", items[i], mg2.Get(i))
+		}
+	}
+}

src/options.go

@@ -0,0 +1,897 @@
+package fzf
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/junegunn/fzf/src/curses"
+
+	"github.com/junegunn/go-shellwords"
+)
+
+const usage = `usage: fzf [options]
+
+  Search
+    -x, --extended        Extended-search mode
+    -e, --extended-exact  Extended-search mode (exact match)
+    -i                    Case-insensitive match (default: smart-case match)
+    +i                    Case-sensitive match
+    -n, --nth=N[,..]      Comma-separated list of field index expressions
+                          for limiting search scope. Each can be a non-zero
+                          integer or a range expression ([BEGIN]..[END])
+    --with-nth=N[,..]     Transform item using index expressions within finder
+    -d, --delimiter=STR   Field delimiter regex for --nth (default: AWK-style)
+    +s, --no-sort         Do not sort the result
+    --tac                 Reverse the order of the input
+    --tiebreak=CRITERION  Sort criterion when the scores are tied;
+                          [length|begin|end|index] (default: length)
+
+  Interface
+    -m, --multi           Enable multi-select with tab/shift-tab
+    --ansi                Enable processing of ANSI color codes
+    --no-mouse            Disable mouse
+    --color=COLSPEC       Base scheme (dark|light|16|bw) and/or custom colors
+    --black               Use black background
+    --reverse             Reverse orientation
+    --margin=MARGIN       Screen margin (TRBL / TB,RL / T,RL,B / T,R,B,L)
+    --cycle               Enable cyclic scroll
+    --no-hscroll          Disable horizontal scroll
+    --inline-info         Display finder info inline with the query
+    --prompt=STR          Input prompt (default: '> ')
+    --bind=KEYBINDS       Custom key bindings. Refer to the man page.
+    --history=FILE        History file
+    --history-size=N      Maximum number of history entries (default: 1000)
+    --header-file=FILE    The file whose content to be printed as header
+    --header-lines=N      The first N lines of the input are treated as header
+
+  Scripting
+    -q, --query=STR       Start the finder with the given query
+    -1, --select-1        Automatically select the only match
+    -0, --exit-0          Exit immediately when there's no match
+    -f, --filter=STR      Filter mode. Do not start interactive finder.
+    --print-query         Print query as the first line
+    --expect=KEYS         Comma-separated list of keys to complete fzf
+    --sync                Synchronous search for multi-staged filtering
+
+  Environment variables
+    FZF_DEFAULT_COMMAND   Default command to use when input is tty
+    FZF_DEFAULT_OPTS      Defaults options. (e.g. '-x -m')
+
+`
+
+// Mode denotes the current search mode
+type Mode int
+
+// Search modes
+const (
+	ModeFuzzy Mode = iota
+	ModeExtended
+	ModeExtendedExact
+)
+
+// Case denotes case-sensitivity of search
+type Case int
+
+// Case-sensitivities
+const (
+	CaseSmart Case = iota
+	CaseIgnore
+	CaseRespect
+)
+
+// Sort criteria
+type tiebreak int
+
+const (
+	byLength tiebreak = iota
+	byBegin
+	byEnd
+	byIndex
+)
+
+func defaultMargin() [4]string {
+	return [4]string{"0", "0", "0", "0"}
+}
+
+// Options stores the values of command-line options
+type Options struct {
+	Mode        Mode
+	Case        Case
+	Nth         []Range
+	WithNth     []Range
+	Delimiter   *regexp.Regexp
+	Sort        int
+	Tac         bool
+	Tiebreak    tiebreak
+	Multi       bool
+	Ansi        bool
+	Mouse       bool
+	Theme       *curses.ColorTheme
+	Black       bool
+	Reverse     bool
+	Cycle       bool
+	Hscroll     bool
+	InlineInfo  bool
+	Prompt      string
+	Query       string
+	Select1     bool
+	Exit0       bool
+	Filter      *string
+	ToggleSort  bool
+	Expect      map[int]string
+	Keymap      map[int]actionType
+	Execmap     map[int]string
+	PrintQuery  bool
+	ReadZero    bool
+	Sync        bool
+	History     *History
+	Header      []string
+	HeaderLines int
+	Margin      [4]string
+	Version     bool
+}
+
+func defaultTheme() *curses.ColorTheme {
+	if strings.Contains(os.Getenv("TERM"), "256") {
+		return curses.Dark256
+	}
+	return curses.Default16
+}
+
+func defaultOptions() *Options {
+	return &Options{
+		Mode:        ModeFuzzy,
+		Case:        CaseSmart,
+		Nth:         make([]Range, 0),
+		WithNth:     make([]Range, 0),
+		Delimiter:   nil,
+		Sort:        1000,
+		Tac:         false,
+		Tiebreak:    byLength,
+		Multi:       false,
+		Ansi:        false,
+		Mouse:       true,
+		Theme:       defaultTheme(),
+		Black:       false,
+		Reverse:     false,
+		Cycle:       false,
+		Hscroll:     true,
+		InlineInfo:  false,
+		Prompt:      "> ",
+		Query:       "",
+		Select1:     false,
+		Exit0:       false,
+		Filter:      nil,
+		ToggleSort:  false,
+		Expect:      make(map[int]string),
+		Keymap:      defaultKeymap(),
+		Execmap:     make(map[int]string),
+		PrintQuery:  false,
+		ReadZero:    false,
+		Sync:        false,
+		History:     nil,
+		Header:      make([]string, 0),
+		HeaderLines: 0,
+		Margin:      defaultMargin(),
+		Version:     false}
+}
+
+func help(ok int) {
+	os.Stderr.WriteString(usage)
+	os.Exit(ok)
+}
+
+func errorExit(msg string) {
+	os.Stderr.WriteString(msg + "\n")
+	os.Exit(1)
+}
+
+func optString(arg string, prefixes ...string) (bool, string) {
+	for _, prefix := range prefixes {
+		if strings.HasPrefix(arg, prefix) {
+			return true, arg[len(prefix):]
+		}
+	}
+	return false, ""
+}
+
+func nextString(args []string, i *int, message string) string {
+	if len(args) > *i+1 {
+		*i++
+	} else {
+		errorExit(message)
+	}
+	return args[*i]
+}
+
+func optionalNextString(args []string, i *int) string {
+	if len(args) > *i+1 {
+		*i++
+		return args[*i]
+	}
+	return ""
+}
+
+func atoi(str string) int {
+	num, err := strconv.Atoi(str)
+	if err != nil {
+		errorExit("not a valid integer: " + str)
+	}
+	return num
+}
+
+func atof(str string) float64 {
+	num, err := strconv.ParseFloat(str, 64)
+	if err != nil {
+		errorExit("not a valid number: " + str)
+	}
+	return num
+}
+
+func nextInt(args []string, i *int, message string) int {
+	if len(args) > *i+1 {
+		*i++
+	} else {
+		errorExit(message)
+	}
+	return atoi(args[*i])
+}
+
+func optionalNumeric(args []string, i *int) int {
+	if len(args) > *i+1 {
+		if strings.IndexAny(args[*i+1], "0123456789") == 0 {
+			*i++
+		}
+	}
+	return 1 // Don't care
+}
+
+func splitNth(str string) []Range {
+	if match, _ := regexp.MatchString("^[0-9,-.]+$", str); !match {
+		errorExit("invalid format: " + str)
+	}
+
+	tokens := strings.Split(str, ",")
+	ranges := make([]Range, len(tokens))
+	for idx, s := range tokens {
+		r, ok := ParseRange(&s)
+		if !ok {
+			errorExit("invalid format: " + str)
+		}
+		ranges[idx] = r
+	}
+	return ranges
+}
+
+func delimiterRegexp(str string) *regexp.Regexp {
+	rx, e := regexp.Compile(str)
+	if e != nil {
+		str = regexp.QuoteMeta(str)
+	}
+
+	rx, e = regexp.Compile(fmt.Sprintf("(?:.*?%s)|(?:.+?$)", str))
+	if e != nil {
+		errorExit("invalid regular expression: " + e.Error())
+	}
+	return rx
+}
+
+func isAlphabet(char uint8) bool {
+	return char >= 'a' && char <= 'z'
+}
+
+func parseKeyChords(str string, message string) map[int]string {
+	if len(str) == 0 {
+		errorExit(message)
+	}
+
+	tokens := strings.Split(str, ",")
+	if str == "," || strings.HasPrefix(str, ",,") || strings.HasSuffix(str, ",,") || strings.Index(str, ",,,") >= 0 {
+		tokens = append(tokens, ",")
+	}
+
+	chords := make(map[int]string)
+	for _, key := range tokens {
+		if len(key) == 0 {
+			continue // ignore
+		}
+		lkey := strings.ToLower(key)
+		chord := 0
+		switch lkey {
+		case "up":
+			chord = curses.Up
+		case "down":
+			chord = curses.Down
+		case "left":
+			chord = curses.Left
+		case "right":
+			chord = curses.Right
+		case "enter", "return":
+			chord = curses.CtrlM
+		case "space":
+			chord = curses.AltZ + int(' ')
+		case "bspace", "bs":
+			chord = curses.BSpace
+		case "alt-bs", "alt-bspace":
+			chord = curses.AltBS
+		case "tab":
+			chord = curses.Tab
+		case "btab", "shift-tab":
+			chord = curses.BTab
+		case "esc":
+			chord = curses.ESC
+		case "del":
+			chord = curses.Del
+		case "home":
+			chord = curses.Home
+		case "end":
+			chord = curses.End
+		case "pgup", "page-up":
+			chord = curses.PgUp
+		case "pgdn", "page-down":
+			chord = curses.PgDn
+		case "shift-left":
+			chord = curses.SLeft
+		case "shift-right":
+			chord = curses.SRight
+		default:
+			if len(key) == 6 && strings.HasPrefix(lkey, "ctrl-") && isAlphabet(lkey[5]) {
+				chord = curses.CtrlA + int(lkey[5]) - 'a'
+			} else if len(key) == 5 && strings.HasPrefix(lkey, "alt-") && isAlphabet(lkey[4]) {
+				chord = curses.AltA + int(lkey[4]) - 'a'
+			} else if len(key) == 2 && strings.HasPrefix(lkey, "f") && key[1] >= '1' && key[1] <= '4' {
+				chord = curses.F1 + int(key[1]) - '1'
+			} else if utf8.RuneCountInString(key) == 1 {
+				chord = curses.AltZ + int([]rune(key)[0])
+			} else {
+				errorExit("unsupported key: " + key)
+			}
+		}
+		if chord > 0 {
+			chords[chord] = key
+		}
+	}
+	return chords
+}
+
+func parseTiebreak(str string) tiebreak {
+	switch strings.ToLower(str) {
+	case "length":
+		return byLength
+	case "index":
+		return byIndex
+	case "begin":
+		return byBegin
+	case "end":
+		return byEnd
+	default:
+		errorExit("invalid sort criterion: " + str)
+	}
+	return byLength
+}
+
+func dupeTheme(theme *curses.ColorTheme) *curses.ColorTheme {
+	dupe := *theme
+	return &dupe
+}
+
+func parseTheme(defaultTheme *curses.ColorTheme, str string) *curses.ColorTheme {
+	theme := dupeTheme(defaultTheme)
+	for _, str := range strings.Split(strings.ToLower(str), ",") {
+		switch str {
+		case "dark":
+			theme = dupeTheme(curses.Dark256)
+		case "light":
+			theme = dupeTheme(curses.Light256)
+		case "16":
+			theme = dupeTheme(curses.Default16)
+		case "bw", "no":
+			theme = nil
+		default:
+			fail := func() {
+				errorExit("invalid color specification: " + str)
+			}
+			// Color is disabled
+			if theme == nil {
+				errorExit("colors disabled; cannot customize colors")
+			}
+
+			pair := strings.Split(str, ":")
+			if len(pair) != 2 {
+				fail()
+			}
+			ansi32, err := strconv.Atoi(pair[1])
+			if err != nil || ansi32 < -1 || ansi32 > 255 {
+				fail()
+			}
+			ansi := int16(ansi32)
+			switch pair[0] {
+			case "fg":
+				theme.Fg = ansi
+				theme.UseDefault = theme.UseDefault && ansi < 0
+			case "bg":
+				theme.Bg = ansi
+				theme.UseDefault = theme.UseDefault && ansi < 0
+			case "fg+":
+				theme.Current = ansi
+			case "bg+":
+				theme.DarkBg = ansi
+			case "hl":
+				theme.Match = ansi
+			case "hl+":
+				theme.CurrentMatch = ansi
+			case "prompt":
+				theme.Prompt = ansi
+			case "spinner":
+				theme.Spinner = ansi
+			case "info":
+				theme.Info = ansi
+			case "pointer":
+				theme.Cursor = ansi
+			case "marker":
+				theme.Selected = ansi
+			case "header":
+				theme.Header = ansi
+			default:
+				fail()
+			}
+		}
+	}
+	return theme
+}
+
+var executeRegexp *regexp.Regexp
+
+func firstKey(keymap map[int]string) int {
+	for k := range keymap {
+		return k
+	}
+	return 0
+}
+
+const (
+	escapedColon = 0
+	escapedComma = 1
+)
+
+func parseKeymap(keymap map[int]actionType, execmap map[int]string, toggleSort bool, str string) (map[int]actionType, map[int]string, bool) {
+	if executeRegexp == nil {
+		// Backreferences are not supported.
+		// "~!@#$%^&*;/|".each_char.map { |c| Regexp.escape(c) }.map { |c| "#{c}[^#{c}]*#{c}" }.join('|')
+		executeRegexp = regexp.MustCompile(
+			"(?s):execute:.*|:execute(\\([^)]*\\)|\\[[^\\]]*\\]|~[^~]*~|![^!]*!|@[^@]*@|\\#[^\\#]*\\#|\\$[^\\$]*\\$|%[^%]*%|\\^[^\\^]*\\^|&[^&]*&|\\*[^\\*]*\\*|;[^;]*;|/[^/]*/|\\|[^\\|]*\\|)")
+	}
+	masked := executeRegexp.ReplaceAllStringFunc(str, func(src string) string {
+		return ":execute(" + strings.Repeat(" ", len(src)-10) + ")"
+	})
+	masked = strings.Replace(masked, "::", string([]rune{escapedColon, ':'}), -1)
+	masked = strings.Replace(masked, ",:", string([]rune{escapedComma, ':'}), -1)
+
+	idx := 0
+	for _, pairStr := range strings.Split(masked, ",") {
+		origPairStr := str[idx : idx+len(pairStr)]
+		idx += len(pairStr) + 1
+
+		pair := strings.SplitN(pairStr, ":", 2)
+		if len(pair) < 2 {
+			errorExit("bind action not specified: " + origPairStr)
+		}
+		var key int
+		if len(pair[0]) == 1 && pair[0][0] == escapedColon {
+			key = ':' + curses.AltZ
+		} else if len(pair[0]) == 1 && pair[0][0] == escapedComma {
+			key = ',' + curses.AltZ
+		} else {
+			keys := parseKeyChords(pair[0], "key name required")
+			key = firstKey(keys)
+		}
+
+		act := origPairStr[len(pair[0])+1 : len(origPairStr)]
+		actLower := strings.ToLower(act)
+		switch actLower {
+		case "ignore":
+			keymap[key] = actIgnore
+		case "beginning-of-line":
+			keymap[key] = actBeginningOfLine
+		case "abort":
+			keymap[key] = actAbort
+		case "accept":
+			keymap[key] = actAccept
+		case "backward-char":
+			keymap[key] = actBackwardChar
+		case "backward-delete-char":
+			keymap[key] = actBackwardDeleteChar
+		case "backward-word":
+			keymap[key] = actBackwardWord
+		case "clear-screen":
+			keymap[key] = actClearScreen
+		case "delete-char":
+			keymap[key] = actDeleteChar
+		case "delete-char/eof":
+			keymap[key] = actDeleteCharEof
+		case "end-of-line":
+			keymap[key] = actEndOfLine
+		case "cancel":
+			keymap[key] = actCancel
+		case "forward-char":
+			keymap[key] = actForwardChar
+		case "forward-word":
+			keymap[key] = actForwardWord
+		case "kill-line":
+			keymap[key] = actKillLine
+		case "kill-word":
+			keymap[key] = actKillWord
+		case "unix-line-discard", "line-discard":
+			keymap[key] = actUnixLineDiscard
+		case "unix-word-rubout", "word-rubout":
+			keymap[key] = actUnixWordRubout
+		case "yank":
+			keymap[key] = actYank
+		case "backward-kill-word":
+			keymap[key] = actBackwardKillWord
+		case "toggle-down":
+			keymap[key] = actToggleDown
+		case "toggle-up":
+			keymap[key] = actToggleUp
+		case "toggle-all":
+			keymap[key] = actToggleAll
+		case "select-all":
+			keymap[key] = actSelectAll
+		case "deselect-all":
+			keymap[key] = actDeselectAll
+		case "toggle":
+			keymap[key] = actToggle
+		case "down":
+			keymap[key] = actDown
+		case "up":
+			keymap[key] = actUp
+		case "page-up":
+			keymap[key] = actPageUp
+		case "page-down":
+			keymap[key] = actPageDown
+		case "previous-history":
+			keymap[key] = actPreviousHistory
+		case "next-history":
+			keymap[key] = actNextHistory
+		case "toggle-sort":
+			keymap[key] = actToggleSort
+			toggleSort = true
+		default:
+			if isExecuteAction(actLower) {
+				keymap[key] = actExecute
+				if act[7] == ':' {
+					execmap[key] = act[8:]
+				} else {
+					execmap[key] = act[8 : len(act)-1]
+				}
+			} else {
+				errorExit("unknown action: " + act)
+			}
+		}
+	}
+	return keymap, execmap, toggleSort
+}
+
+func isExecuteAction(str string) bool {
+	if !strings.HasPrefix(str, "execute") || len(str) < 9 {
+		return false
+	}
+	b := str[7]
+	e := str[len(str)-1]
+	if b == ':' || b == '(' && e == ')' || b == '[' && e == ']' ||
+		b == e && strings.ContainsAny(string(b), "~!@#$%^&*;/|") {
+		return true
+	}
+	return false
+}
+
+func checkToggleSort(keymap map[int]actionType, str string) map[int]actionType {
+	keys := parseKeyChords(str, "key name required")
+	if len(keys) != 1 {
+		errorExit("multiple keys specified")
+	}
+	keymap[firstKey(keys)] = actToggleSort
+	return keymap
+}
+
+func readHeaderFile(filename string) []string {
+	content, err := ioutil.ReadFile(filename)
+	if err != nil {
+		errorExit("failed to read header file: " + filename)
+	}
+	return strings.Split(strings.TrimSuffix(string(content), "\n"), "\n")
+}
+
+func parseMargin(margin string) [4]string {
+	margins := strings.Split(margin, ",")
+	checked := func(str string) string {
+		if strings.HasSuffix(str, "%") {
+			val := atof(str[:len(str)-1])
+			if val < 0 {
+				errorExit("margin must be non-negative")
+			}
+			if val > 100 {
+				errorExit("margin too large")
+			}
+		} else {
+			val := atoi(str)
+			if val < 0 {
+				errorExit("margin must be non-negative")
+			}
+		}
+		return str
+	}
+	switch len(margins) {
+	case 1:
+		m := checked(margins[0])
+		return [4]string{m, m, m, m}
+	case 2:
+		tb := checked(margins[0])
+		rl := checked(margins[1])
+		return [4]string{tb, rl, tb, rl}
+	case 3:
+		t := checked(margins[0])
+		rl := checked(margins[1])
+		b := checked(margins[2])
+		return [4]string{t, rl, b, rl}
+	case 4:
+		return [4]string{
+			checked(margins[0]), checked(margins[1]),
+			checked(margins[2]), checked(margins[3])}
+	default:
+		errorExit("invalid margin: " + margin)
+	}
+	return defaultMargin()
+}
+
+func parseOptions(opts *Options, allArgs []string) {
+	keymap := make(map[int]actionType)
+	var historyMax int
+	if opts.History == nil {
+		historyMax = defaultHistoryMax
+	} else {
+		historyMax = opts.History.maxSize
+	}
+	setHistory := func(path string) {
+		h, e := NewHistory(path, historyMax)
+		if e != nil {
+			errorExit(e.Error())
+		}
+		opts.History = h
+	}
+	setHistoryMax := func(max int) {
+		historyMax = max
+		if historyMax < 1 {
+			errorExit("history max must be a positive integer")
+		}
+		if opts.History != nil {
+			opts.History.maxSize = historyMax
+		}
+	}
+	for i := 0; i < len(allArgs); i++ {
+		arg := allArgs[i]
+		switch arg {
+		case "-h", "--help":
+			help(0)
+		case "-x", "--extended":
+			opts.Mode = ModeExtended
+		case "-e", "--extended-exact":
+			opts.Mode = ModeExtendedExact
+		case "+x", "--no-extended", "+e", "--no-extended-exact":
+			opts.Mode = ModeFuzzy
+		case "-q", "--query":
+			opts.Query = nextString(allArgs, &i, "query string required")
+		case "-f", "--filter":
+			filter := nextString(allArgs, &i, "query string required")
+			opts.Filter = &filter
+		case "--expect":
+			opts.Expect = parseKeyChords(nextString(allArgs, &i, "key names required"), "key names required")
+		case "--tiebreak":
+			opts.Tiebreak = parseTiebreak(nextString(allArgs, &i, "sort criterion required"))
+		case "--bind":
+			keymap, opts.Execmap, opts.ToggleSort =
+				parseKeymap(keymap, opts.Execmap, opts.ToggleSort, nextString(allArgs, &i, "bind expression required"))
+		case "--color":
+			spec := optionalNextString(allArgs, &i)
+			if len(spec) == 0 {
+				opts.Theme = defaultTheme()
+			} else {
+				opts.Theme = parseTheme(opts.Theme, spec)
+			}
+		case "--toggle-sort":
+			keymap = checkToggleSort(keymap, nextString(allArgs, &i, "key name required"))
+			opts.ToggleSort = true
+		case "-d", "--delimiter":
+			opts.Delimiter = delimiterRegexp(nextString(allArgs, &i, "delimiter required"))
+		case "-n", "--nth":
+			opts.Nth = splitNth(nextString(allArgs, &i, "nth expression required"))
+		case "--with-nth":
+			opts.WithNth = splitNth(nextString(allArgs, &i, "nth expression required"))
+		case "-s", "--sort":
+			opts.Sort = optionalNumeric(allArgs, &i)
+		case "+s", "--no-sort":
+			opts.Sort = 0
+		case "--tac":
+			opts.Tac = true
+		case "--no-tac":
+			opts.Tac = false
+		case "-i":
+			opts.Case = CaseIgnore
+		case "+i":
+			opts.Case = CaseRespect
+		case "-m", "--multi":
+			opts.Multi = true
+		case "+m", "--no-multi":
+			opts.Multi = false
+		case "--ansi":
+			opts.Ansi = true
+		case "--no-ansi":
+			opts.Ansi = false
+		case "--no-mouse":
+			opts.Mouse = false
+		case "+c", "--no-color":
+			opts.Theme = nil
+		case "+2", "--no-256":
+			opts.Theme = curses.Default16
+		case "--black":
+			opts.Black = true
+		case "--no-black":
+			opts.Black = false
+		case "--reverse":
+			opts.Reverse = true
+		case "--no-reverse":
+			opts.Reverse = false
+		case "--cycle":
+			opts.Cycle = true
+		case "--no-cycle":
+			opts.Cycle = false
+		case "--hscroll":
+			opts.Hscroll = true
+		case "--no-hscroll":
+			opts.Hscroll = false
+		case "--inline-info":
+			opts.InlineInfo = true
+		case "--no-inline-info":
+			opts.InlineInfo = false
+		case "-1", "--select-1":
+			opts.Select1 = true
+		case "+1", "--no-select-1":
+			opts.Select1 = false
+		case "-0", "--exit-0":
+			opts.Exit0 = true
+		case "+0", "--no-exit-0":
+			opts.Exit0 = false
+		case "--read0":
+			opts.ReadZero = true
+		case "--no-read0":
+			opts.ReadZero = false
+		case "--print-query":
+			opts.PrintQuery = true
+		case "--no-print-query":
+			opts.PrintQuery = false
+		case "--prompt":
+			opts.Prompt = nextString(allArgs, &i, "prompt string required")
+		case "--sync":
+			opts.Sync = true
+		case "--no-sync":
+			opts.Sync = false
+		case "--async":
+			opts.Sync = false
+		case "--no-history":
+			opts.History = nil
+		case "--history":
+			setHistory(nextString(allArgs, &i, "history file path required"))
+		case "--history-size":
+			setHistoryMax(nextInt(allArgs, &i, "history max size required"))
+		case "--no-header-file":
+			opts.Header = []string{}
+		case "--no-header-lines":
+			opts.HeaderLines = 0
+		case "--header-file":
+			opts.Header = readHeaderFile(
+				nextString(allArgs, &i, "header file name required"))
+			opts.HeaderLines = 0
+		case "--header-lines":
+			opts.Header = []string{}
+			opts.HeaderLines = atoi(
+				nextString(allArgs, &i, "number of header lines required"))
+		case "--no-margin":
+			opts.Margin = defaultMargin()
+		case "--margin":
+			opts.Margin = parseMargin(
+				nextString(allArgs, &i, "margin required (TRBL / TB,RL / T,RL,B / T,R,B,L)"))
+		case "--version":
+			opts.Version = true
+		default:
+			if match, value := optString(arg, "-q", "--query="); match {
+				opts.Query = value
+			} else if match, value := optString(arg, "-f", "--filter="); match {
+				opts.Filter = &value
+			} else if match, value := optString(arg, "-d", "--delimiter="); match {
+				opts.Delimiter = delimiterRegexp(value)
+			} else if match, value := optString(arg, "--prompt="); match {
+				opts.Prompt = value
+			} else if match, value := optString(arg, "-n", "--nth="); match {
+				opts.Nth = splitNth(value)
+			} else if match, value := optString(arg, "--with-nth="); match {
+				opts.WithNth = splitNth(value)
+			} else if match, _ := optString(arg, "-s", "--sort="); match {
+				opts.Sort = 1 // Don't care
+			} else if match, value := optString(arg, "--toggle-sort="); match {
+				keymap = checkToggleSort(keymap, value)
+				opts.ToggleSort = true
+			} else if match, value := optString(arg, "--expect="); match {
+				opts.Expect = parseKeyChords(value, "key names required")
+			} else if match, value := optString(arg, "--tiebreak="); match {
+				opts.Tiebreak = parseTiebreak(value)
+			} else if match, value := optString(arg, "--color="); match {
+				opts.Theme = parseTheme(opts.Theme, value)
+			} else if match, value := optString(arg, "--bind="); match {
+				keymap, opts.Execmap, opts.ToggleSort =
+					parseKeymap(keymap, opts.Execmap, opts.ToggleSort, value)
+			} else if match, value := optString(arg, "--history="); match {
+				setHistory(value)
+			} else if match, value := optString(arg, "--history-size="); match {
+				setHistoryMax(atoi(value))
+			} else if match, value := optString(arg, "--header-file="); match {
+				opts.Header = readHeaderFile(value)
+				opts.HeaderLines = 0
+			} else if match, value := optString(arg, "--header-lines="); match {
+				opts.Header = []string{}
+				opts.HeaderLines = atoi(value)
+			} else if match, value := optString(arg, "--margin="); match {
+				opts.Margin = parseMargin(value)
+			} else {
+				errorExit("unknown option: " + arg)
+			}
+		}
+	}
+
+	if opts.HeaderLines < 0 {
+		errorExit("header lines must be a non-negative integer")
+	}
+
+	// Change default actions for CTRL-N / CTRL-P when --history is used
+	if opts.History != nil {
+		if _, prs := keymap[curses.CtrlP]; !prs {
+			keymap[curses.CtrlP] = actPreviousHistory
+		}
+		if _, prs := keymap[curses.CtrlN]; !prs {
+			keymap[curses.CtrlN] = actNextHistory
+		}
+	}
+
+	// Override default key bindings
+	for key, act := range keymap {
+		opts.Keymap[key] = act
+	}
+
+	// If we're not using extended search mode, --nth option becomes irrelevant
+	// if it contains the whole range
+	if opts.Mode == ModeFuzzy || len(opts.Nth) == 1 {
+		for _, r := range opts.Nth {
+			if r.begin == rangeEllipsis && r.end == rangeEllipsis {
+				opts.Nth = make([]Range, 0)
+				return
+			}
+		}
+	}
+}
+
+// ParseOptions parses command-line options
+func ParseOptions() *Options {
+	opts := defaultOptions()
+
+	// Options from Env var
+	words, _ := shellwords.Parse(os.Getenv("FZF_DEFAULT_OPTS"))
+	parseOptions(opts, words)
+
+	// Options from command-line arguments
+	parseOptions(opts, os.Args[1:])
+	return opts
+}

src/options_test.go

@@ -0,0 +1,270 @@
+package fzf
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/junegunn/fzf/src/curses"
+)
+
+func TestDelimiterRegex(t *testing.T) {
+	rx := delimiterRegexp("*")
+	tokens := rx.FindAllString("-*--*---**---", -1)
+	if tokens[0] != "-*" || tokens[1] != "--*" || tokens[2] != "---*" ||
+		tokens[3] != "*" || tokens[4] != "---" {
+		t.Errorf("%s %s %d", rx, tokens, len(tokens))
+	}
+}
+
+func TestSplitNth(t *testing.T) {
+	{
+		ranges := splitNth("..")
+		if len(ranges) != 1 ||
+			ranges[0].begin != rangeEllipsis ||
+			ranges[0].end != rangeEllipsis {
+			t.Errorf("%s", ranges)
+		}
+	}
+	{
+		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 ||
+			ranges[2].begin != 2 || ranges[2].end != 3 ||
+			ranges[3].begin != 4 || ranges[3].end != rangeEllipsis ||
+			ranges[4].begin != -3 || ranges[4].end != -2 ||
+			ranges[5].begin != rangeEllipsis || ranges[5].end != rangeEllipsis ||
+			ranges[6].begin != 2 || ranges[6].end != 2 ||
+			ranges[7].begin != -2 || ranges[7].end != -2 ||
+			ranges[8].begin != 2 || ranges[8].end != -2 ||
+			ranges[9].begin != rangeEllipsis || ranges[9].end != rangeEllipsis {
+			t.Errorf("%s", ranges)
+		}
+	}
+}
+
+func TestIrrelevantNth(t *testing.T) {
+	{
+		opts := defaultOptions()
+		words := []string{"--nth", "..", "-x"}
+		parseOptions(opts, words)
+		if len(opts.Nth) != 0 {
+			t.Errorf("nth should be empty: %s", opts.Nth)
+		}
+	}
+	for _, words := range [][]string{[]string{"--nth", "..,3"}, []string{"--nth", "3,1.."}, []string{"--nth", "..-1,1"}} {
+		{
+			opts := defaultOptions()
+			parseOptions(opts, words)
+			if len(opts.Nth) != 0 {
+				t.Errorf("nth should be empty: %s", opts.Nth)
+			}
+		}
+		{
+			opts := defaultOptions()
+			words = append(words, "-x")
+			parseOptions(opts, words)
+			if len(opts.Nth) != 2 {
+				t.Errorf("nth should not be empty: %s", opts.Nth)
+			}
+		}
+	}
+}
+
+func TestParseKeys(t *testing.T) {
+	pairs := parseKeyChords("ctrl-z,alt-z,f2,@,Alt-a,!,ctrl-G,J,g", "")
+	check := func(i int, s string) {
+		if pairs[i] != s {
+			t.Errorf("%s != %s", pairs[i], s)
+		}
+	}
+	if len(pairs) != 9 {
+		t.Error(9)
+	}
+	check(curses.CtrlZ, "ctrl-z")
+	check(curses.AltZ, "alt-z")
+	check(curses.F2, "f2")
+	check(curses.AltZ+'@', "@")
+	check(curses.AltA, "Alt-a")
+	check(curses.AltZ+'!', "!")
+	check(curses.CtrlA+'g'-'a', "ctrl-G")
+	check(curses.AltZ+'J', "J")
+	check(curses.AltZ+'g', "g")
+
+	// Synonyms
+	pairs = parseKeyChords("enter,Return,space,tab,btab,esc,up,down,left,right", "")
+	if len(pairs) != 9 {
+		t.Error(9)
+	}
+	check(curses.CtrlM, "Return")
+	check(curses.AltZ+' ', "space")
+	check(curses.Tab, "tab")
+	check(curses.BTab, "btab")
+	check(curses.ESC, "esc")
+	check(curses.Up, "up")
+	check(curses.Down, "down")
+	check(curses.Left, "left")
+	check(curses.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", "")
+	if len(pairs) != 11 {
+		t.Error(11)
+	}
+	check(curses.Tab, "Ctrl-I")
+	check(curses.PgUp, "page-up")
+	check(curses.PgDn, "Page-Down")
+	check(curses.Home, "Home")
+	check(curses.End, "End")
+	check(curses.AltBS, "Alt-BSpace")
+	check(curses.SLeft, "shift-left")
+	check(curses.SRight, "shift-right")
+	check(curses.BTab, "shift-tab")
+	check(curses.CtrlM, "Enter")
+	check(curses.BSpace, "bspace")
+}
+
+func TestParseKeysWithComma(t *testing.T) {
+	checkN := func(a int, b int) {
+		if a != b {
+			t.Errorf("%d != %d", a, b)
+		}
+	}
+	check := func(pairs map[int]string, i int, s string) {
+		if pairs[i] != s {
+			t.Errorf("%s != %s", pairs[i], s)
+		}
+	}
+
+	pairs := parseKeyChords(",", "")
+	checkN(len(pairs), 1)
+	check(pairs, curses.AltZ+',', ",")
+
+	pairs = parseKeyChords(",,a,b", "")
+	checkN(len(pairs), 3)
+	check(pairs, curses.AltZ+'a', "a")
+	check(pairs, curses.AltZ+'b', "b")
+	check(pairs, curses.AltZ+',', ",")
+
+	pairs = parseKeyChords("a,b,,", "")
+	checkN(len(pairs), 3)
+	check(pairs, curses.AltZ+'a', "a")
+	check(pairs, curses.AltZ+'b', "b")
+	check(pairs, curses.AltZ+',', ",")
+
+	pairs = parseKeyChords("a,,,b", "")
+	checkN(len(pairs), 3)
+	check(pairs, curses.AltZ+'a', "a")
+	check(pairs, curses.AltZ+'b', "b")
+	check(pairs, curses.AltZ+',', ",")
+
+	pairs = parseKeyChords("a,,,b,c", "")
+	checkN(len(pairs), 4)
+	check(pairs, curses.AltZ+'a', "a")
+	check(pairs, curses.AltZ+'b', "b")
+	check(pairs, curses.AltZ+'c', "c")
+	check(pairs, curses.AltZ+',', ",")
+
+	pairs = parseKeyChords(",,,", "")
+	checkN(len(pairs), 1)
+	check(pairs, curses.AltZ+',', ",")
+}
+
+func TestBind(t *testing.T) {
+	check := func(action actionType, expected actionType) {
+		if action != expected {
+			t.Errorf("%d != %d", action, expected)
+		}
+	}
+	checkString := func(action string, expected string) {
+		if action != expected {
+			t.Errorf("%d != %d", action, expected)
+		}
+	}
+	keymap := defaultKeymap()
+	execmap := make(map[int]string)
+	check(actBeginningOfLine, keymap[curses.CtrlA])
+	keymap, execmap, toggleSort :=
+		parseKeymap(keymap, execmap, false,
+			"ctrl-a:kill-line,ctrl-b:toggle-sort,c:page-up,alt-z:page-down,"+
+				"f1:execute(ls {}),f2:execute/echo {}, {}, {}/,f3:execute[echo '({})'],f4:execute;less {};,"+
+				"alt-a:execute@echo (,),[,],/,:,;,%,{}@,alt-b:execute;echo (,),[,],/,:,@,%,{};"+
+				",,:abort,::accept,X:execute:\nfoobar,Y:execute(baz)")
+	if !toggleSort {
+		t.Errorf("toggleSort not set")
+	}
+	check(actKillLine, keymap[curses.CtrlA])
+	check(actToggleSort, keymap[curses.CtrlB])
+	check(actPageUp, keymap[curses.AltZ+'c'])
+	check(actAbort, keymap[curses.AltZ+','])
+	check(actAccept, keymap[curses.AltZ+':'])
+	check(actPageDown, keymap[curses.AltZ])
+	check(actExecute, keymap[curses.F1])
+	check(actExecute, keymap[curses.F2])
+	check(actExecute, keymap[curses.F3])
+	check(actExecute, keymap[curses.F4])
+	checkString("ls {}", execmap[curses.F1])
+	checkString("echo {}, {}, {}", execmap[curses.F2])
+	checkString("echo '({})'", execmap[curses.F3])
+	checkString("less {}", execmap[curses.F4])
+	checkString("echo (,),[,],/,:,;,%,{}", execmap[curses.AltA])
+	checkString("echo (,),[,],/,:,@,%,{}", execmap[curses.AltB])
+	checkString("\nfoobar,Y:execute(baz)", execmap[curses.AltZ+'X'])
+
+	for idx, char := range []rune{'~', '!', '@', '#', '$', '%', '^', '&', '*', '|', ';', '/'} {
+		keymap, execmap, toggleSort =
+			parseKeymap(keymap, execmap, false, fmt.Sprintf("%d:execute%cfoobar%c", idx%10, char, char))
+		checkString("foobar", execmap[curses.AltZ+int([]rune(fmt.Sprintf("%d", idx%10))[0])])
+	}
+
+	keymap, execmap, toggleSort = parseKeymap(keymap, execmap, false, "f1:abort")
+	if toggleSort {
+		t.Errorf("toggleSort set")
+	}
+	check(actAbort, keymap[curses.F1])
+}
+
+func TestColorSpec(t *testing.T) {
+	theme := curses.Dark256
+	dark := parseTheme(theme, "dark")
+	if *dark != *theme {
+		t.Errorf("colors should be equivalent")
+	}
+	if dark == theme {
+		t.Errorf("point should not be equivalent")
+	}
+
+	light := parseTheme(theme, "dark,light")
+	if *light == *theme {
+		t.Errorf("should not be equivalent")
+	}
+	if *light != *curses.Light256 {
+		t.Errorf("colors should be equivalent")
+	}
+	if light == theme {
+		t.Errorf("point should not be equivalent")
+	}
+
+	customized := parseTheme(theme, "fg:231,bg:232")
+	if customized.Fg != 231 || customized.Bg != 232 {
+		t.Errorf("color not customized")
+	}
+	if *curses.Dark256 == *customized {
+		t.Errorf("colors should not be equivalent")
+	}
+	customized.Fg = curses.Dark256.Fg
+	customized.Bg = curses.Dark256.Bg
+	if *curses.Dark256 == *customized {
+		t.Errorf("colors should now be equivalent")
+	}
+
+	customized = parseTheme(theme, "fg:231,dark,bg:232")
+	if customized.Fg != curses.Dark256.Fg || customized.Bg == curses.Dark256.Bg {
+		t.Errorf("color not customized")
+	}
+	if customized.UseDefault {
+		t.Errorf("not using default colors")
+	}
+	if !curses.Dark256.UseDefault {
+		t.Errorf("using default colors")
+	}
+}

src/pattern.go

@@ -0,0 +1,335 @@
+package fzf
+
+import (
+	"regexp"
+	"sort"
+	"strings"
+
+	"github.com/junegunn/fzf/src/algo"
+)
+
+// fuzzy
+// 'exact
+// ^exact-prefix
+// exact-suffix$
+// !not-fuzzy
+// !'not-exact
+// !^not-exact-prefix
+// !not-exact-suffix$
+
+type termType int
+
+const (
+	termFuzzy termType = iota
+	termExact
+	termPrefix
+	termSuffix
+	termEqual
+)
+
+type term struct {
+	typ           termType
+	inv           bool
+	text          []rune
+	caseSensitive bool
+	origText      []rune
+}
+
+// Pattern represents search pattern
+type Pattern struct {
+	mode          Mode
+	caseSensitive bool
+	text          []rune
+	terms         []term
+	hasInvTerm    bool
+	delimiter     *regexp.Regexp
+	nth           []Range
+	procFun       map[termType]func(bool, *[]rune, []rune) (int, int)
+}
+
+var (
+	_patternCache map[string]*Pattern
+	_splitRegex   *regexp.Regexp
+	_cache        ChunkCache
+)
+
+func init() {
+	_splitRegex = regexp.MustCompile("\\s+")
+	clearPatternCache()
+	clearChunkCache()
+}
+
+func clearPatternCache() {
+	// We can uniquely identify the pattern for a given string since
+	// 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(mode Mode, caseMode Case,
+	nth []Range, delimiter *regexp.Regexp, runes []rune) *Pattern {
+
+	var asString string
+	switch mode {
+	case ModeExtended, ModeExtendedExact:
+		asString = strings.Trim(string(runes), " ")
+	default:
+		asString = string(runes)
+	}
+
+	cached, found := _patternCache[asString]
+	if found {
+		return cached
+	}
+
+	caseSensitive, hasInvTerm := true, false
+	terms := []term{}
+
+	switch mode {
+	case ModeExtended, ModeExtendedExact:
+		terms = parseTerms(mode, caseMode, asString)
+		for _, term := range terms {
+			if term.inv {
+				hasInvTerm = true
+			}
+		}
+	default:
+		lowerString := strings.ToLower(asString)
+		caseSensitive = caseMode == CaseRespect ||
+			caseMode == CaseSmart && lowerString != asString
+		if !caseSensitive {
+			asString = lowerString
+		}
+	}
+
+	ptr := &Pattern{
+		mode:          mode,
+		caseSensitive: caseSensitive,
+		text:          []rune(asString),
+		terms:         terms,
+		hasInvTerm:    hasInvTerm,
+		nth:           nth,
+		delimiter:     delimiter,
+		procFun:       make(map[termType]func(bool, *[]rune, []rune) (int, int))}
+
+	ptr.procFun[termFuzzy] = algo.FuzzyMatch
+	ptr.procFun[termEqual] = algo.EqualMatch
+	ptr.procFun[termExact] = algo.ExactMatchNaive
+	ptr.procFun[termPrefix] = algo.PrefixMatch
+	ptr.procFun[termSuffix] = algo.SuffixMatch
+
+	_patternCache[asString] = ptr
+	return ptr
+}
+
+func parseTerms(mode Mode, caseMode Case, str string) []term {
+	tokens := _splitRegex.Split(str, -1)
+	terms := []term{}
+	for _, token := range tokens {
+		typ, inv, text := termFuzzy, false, token
+		lowerText := strings.ToLower(text)
+		caseSensitive := caseMode == CaseRespect ||
+			caseMode == CaseSmart && text != lowerText
+		if !caseSensitive {
+			text = lowerText
+		}
+		origText := []rune(text)
+		if mode == ModeExtendedExact {
+			typ = termExact
+		}
+
+		if strings.HasPrefix(text, "!") {
+			inv = true
+			text = text[1:]
+		}
+
+		if strings.HasPrefix(text, "'") {
+			if mode == ModeExtended {
+				typ = termExact
+				text = text[1:]
+			}
+		} else if strings.HasPrefix(text, "^") {
+			if strings.HasSuffix(text, "$") {
+				typ = termEqual
+				text = text[1 : len(text)-1]
+			} else {
+				typ = termPrefix
+				text = text[1:]
+			}
+		} else if strings.HasSuffix(text, "$") {
+			typ = termSuffix
+			text = text[:len(text)-1]
+		}
+
+		if len(text) > 0 {
+			terms = append(terms, term{
+				typ:           typ,
+				inv:           inv,
+				text:          []rune(text),
+				caseSensitive: caseSensitive,
+				origText:      origText})
+		}
+	}
+	return terms
+}
+
+// IsEmpty returns true if the pattern is effectively empty
+func (p *Pattern) IsEmpty() bool {
+	if p.mode == ModeFuzzy {
+		return len(p.text) == 0
+	}
+	return len(p.terms) == 0
+}
+
+// AsString returns the search query in string type
+func (p *Pattern) AsString() string {
+	return string(p.text)
+}
+
+// CacheKey is used to build string to be used as the key of result cache
+func (p *Pattern) CacheKey() string {
+	if p.mode == ModeFuzzy {
+		return p.AsString()
+	}
+	cacheableTerms := []string{}
+	for _, term := range p.terms {
+		if term.inv {
+			continue
+		}
+		cacheableTerms = append(cacheableTerms, string(term.origText))
+	}
+	return strings.Join(cacheableTerms, " ")
+}
+
+// Match returns the list of matches Items in the given Chunk
+func (p *Pattern) Match(chunk *Chunk) []*Item {
+	space := chunk
+
+	// ChunkCache: Exact match
+	cacheKey := p.CacheKey()
+	if !p.hasInvTerm { // Because we're excluding Inv-term from cache key
+		if cached, found := _cache.Find(chunk, cacheKey); found {
+			return cached
+		}
+	}
+
+	// ChunkCache: Prefix/suffix match
+Loop:
+	for idx := 1; idx < len(cacheKey); idx++ {
+		// [---------| ] | [ |---------]
+		// [--------|  ] | [  |--------]
+		// [-------|   ] | [   |-------]
+		prefix := cacheKey[:len(cacheKey)-idx]
+		suffix := cacheKey[idx:]
+		for _, substr := range [2]*string{&prefix, &suffix} {
+			if cached, found := _cache.Find(chunk, *substr); found {
+				cachedChunk := Chunk(cached)
+				space = &cachedChunk
+				break Loop
+			}
+		}
+	}
+
+	matches := p.matchChunk(space)
+
+	if !p.hasInvTerm {
+		_cache.Add(chunk, cacheKey, matches)
+	}
+	return matches
+}
+
+func (p *Pattern) matchChunk(chunk *Chunk) []*Item {
+	matches := []*Item{}
+	if p.mode == ModeFuzzy {
+		for _, item := range *chunk {
+			if sidx, eidx := p.fuzzyMatch(item); sidx >= 0 {
+				matches = append(matches,
+					dupItem(item, []Offset{Offset{int32(sidx), int32(eidx)}}))
+			}
+		}
+	} else {
+		for _, item := range *chunk {
+			if offsets := p.extendedMatch(item); len(offsets) == len(p.terms) {
+				matches = append(matches, dupItem(item, offsets))
+			}
+		}
+	}
+	return matches
+}
+
+// MatchItem returns true if the Item is a match
+func (p *Pattern) MatchItem(item *Item) bool {
+	if p.mode == ModeFuzzy {
+		sidx, _ := p.fuzzyMatch(item)
+		return sidx >= 0
+	}
+	offsets := p.extendedMatch(item)
+	return len(offsets) == len(p.terms)
+}
+
+func dupItem(item *Item, offsets []Offset) *Item {
+	sort.Sort(ByOrder(offsets))
+	return &Item{
+		text:        item.text,
+		origText:    item.origText,
+		transformed: item.transformed,
+		index:       item.index,
+		offsets:     offsets,
+		colors:      item.colors,
+		rank:        Rank{0, 0, item.index}}
+}
+
+func (p *Pattern) fuzzyMatch(item *Item) (int, int) {
+	input := p.prepareInput(item)
+	return p.iter(algo.FuzzyMatch, input, p.caseSensitive, p.text)
+}
+
+func (p *Pattern) extendedMatch(item *Item) []Offset {
+	input := p.prepareInput(item)
+	offsets := []Offset{}
+	for _, term := range p.terms {
+		pfun := p.procFun[term.typ]
+		if sidx, eidx := p.iter(pfun, input, term.caseSensitive, term.text); sidx >= 0 {
+			if term.inv {
+				break
+			}
+			offsets = append(offsets, Offset{int32(sidx), int32(eidx)})
+		} else if term.inv {
+			offsets = append(offsets, Offset{0, 0})
+		}
+	}
+	return offsets
+}
+
+func (p *Pattern) prepareInput(item *Item) *[]Token {
+	if item.transformed != nil {
+		return item.transformed
+	}
+
+	var ret *[]Token
+	if len(p.nth) > 0 {
+		tokens := Tokenize(item.text, p.delimiter)
+		ret = Transform(tokens, p.nth)
+	} else {
+		runes := []rune(*item.text)
+		trans := []Token{Token{text: &runes, prefixLength: 0}}
+		ret = &trans
+	}
+	item.transformed = ret
+	return ret
+}
+
+func (p *Pattern) iter(pfun func(bool, *[]rune, []rune) (int, int),
+	tokens *[]Token, caseSensitive bool, pattern []rune) (int, int) {
+	for _, part := range *tokens {
+		prefixLength := part.prefixLength
+		if sidx, eidx := pfun(caseSensitive, part.text, pattern); sidx >= 0 {
+			return sidx + prefixLength, eidx + prefixLength
+		}
+	}
+	return -1, -1
+}

src/pattern_test.go

@@ -0,0 +1,133 @@
+package fzf
+
+import (
+	"testing"
+
+	"github.com/junegunn/fzf/src/algo"
+)
+
+func TestParseTermsExtended(t *testing.T) {
+	terms := parseTerms(ModeExtended, CaseSmart,
+		"aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$ ^iii$")
+	if len(terms) != 9 ||
+		terms[0].typ != termFuzzy || terms[0].inv ||
+		terms[1].typ != termExact || terms[1].inv ||
+		terms[2].typ != termPrefix || terms[2].inv ||
+		terms[3].typ != termSuffix || terms[3].inv ||
+		terms[4].typ != termFuzzy || !terms[4].inv ||
+		terms[5].typ != termExact || !terms[5].inv ||
+		terms[6].typ != termPrefix || !terms[6].inv ||
+		terms[7].typ != termSuffix || !terms[7].inv ||
+		terms[8].typ != termEqual || terms[8].inv {
+		t.Errorf("%s", terms)
+	}
+	for idx, term := range terms {
+		if len(term.text) != 3 {
+			t.Errorf("%s", term)
+		}
+		if idx > 0 && len(term.origText) != 4+idx/5 {
+			t.Errorf("%s", term)
+		}
+	}
+}
+
+func TestParseTermsExtendedExact(t *testing.T) {
+	terms := parseTerms(ModeExtendedExact, CaseSmart,
+		"aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$")
+	if len(terms) != 8 ||
+		terms[0].typ != termExact || terms[0].inv || len(terms[0].text) != 3 ||
+		terms[1].typ != termExact || terms[1].inv || len(terms[1].text) != 4 ||
+		terms[2].typ != termPrefix || terms[2].inv || len(terms[2].text) != 3 ||
+		terms[3].typ != termSuffix || terms[3].inv || len(terms[3].text) != 3 ||
+		terms[4].typ != termExact || !terms[4].inv || len(terms[4].text) != 3 ||
+		terms[5].typ != termExact || !terms[5].inv || len(terms[5].text) != 4 ||
+		terms[6].typ != termPrefix || !terms[6].inv || len(terms[6].text) != 3 ||
+		terms[7].typ != termSuffix || !terms[7].inv || len(terms[7].text) != 3 {
+		t.Errorf("%s", terms)
+	}
+}
+
+func TestParseTermsEmpty(t *testing.T) {
+	terms := parseTerms(ModeExtended, CaseSmart, "' $ ^ !' !^ !$")
+	if len(terms) != 0 {
+		t.Errorf("%s", terms)
+	}
+}
+
+func TestExact(t *testing.T) {
+	defer clearPatternCache()
+	clearPatternCache()
+	pattern := BuildPattern(ModeExtended, CaseSmart,
+		[]Range{}, nil, []rune("'abc"))
+	runes := []rune("aabbcc abc")
+	sidx, eidx := algo.ExactMatchNaive(pattern.caseSensitive, &runes, pattern.terms[0].text)
+	if sidx != 7 || eidx != 10 {
+		t.Errorf("%s / %d / %d", pattern.terms, sidx, eidx)
+	}
+}
+
+func TestEqual(t *testing.T) {
+	defer clearPatternCache()
+	clearPatternCache()
+	pattern := BuildPattern(ModeExtended, CaseSmart, []Range{}, nil, []rune("^AbC$"))
+
+	match := func(str string, sidxExpected int, eidxExpected int) {
+		runes := []rune(str)
+		sidx, eidx := algo.EqualMatch(pattern.caseSensitive, &runes, pattern.terms[0].text)
+		if sidx != sidxExpected || eidx != eidxExpected {
+			t.Errorf("%s / %d / %d", pattern.terms, sidx, eidx)
+		}
+	}
+	match("ABC", -1, -1)
+	match("AbC", 0, 3)
+}
+
+func TestCaseSensitivity(t *testing.T) {
+	defer clearPatternCache()
+	clearPatternCache()
+	pat1 := BuildPattern(ModeFuzzy, CaseSmart, []Range{}, nil, []rune("abc"))
+	clearPatternCache()
+	pat2 := BuildPattern(ModeFuzzy, CaseSmart, []Range{}, nil, []rune("Abc"))
+	clearPatternCache()
+	pat3 := BuildPattern(ModeFuzzy, CaseIgnore, []Range{}, nil, []rune("abc"))
+	clearPatternCache()
+	pat4 := BuildPattern(ModeFuzzy, CaseIgnore, []Range{}, nil, []rune("Abc"))
+	clearPatternCache()
+	pat5 := BuildPattern(ModeFuzzy, CaseRespect, []Range{}, nil, []rune("abc"))
+	clearPatternCache()
+	pat6 := BuildPattern(ModeFuzzy, CaseRespect, []Range{}, nil, []rune("Abc"))
+
+	if string(pat1.text) != "abc" || pat1.caseSensitive != false ||
+		string(pat2.text) != "Abc" || pat2.caseSensitive != true ||
+		string(pat3.text) != "abc" || pat3.caseSensitive != false ||
+		string(pat4.text) != "abc" || pat4.caseSensitive != false ||
+		string(pat5.text) != "abc" || pat5.caseSensitive != true ||
+		string(pat6.text) != "Abc" || pat6.caseSensitive != true {
+		t.Error("Invalid case conversion")
+	}
+}
+
+func TestOrigTextAndTransformed(t *testing.T) {
+	strptr := func(str string) *string {
+		return &str
+	}
+	pattern := BuildPattern(ModeExtended, CaseSmart, []Range{}, nil, []rune("jg"))
+	tokens := Tokenize(strptr("junegunn"), nil)
+	trans := Transform(tokens, []Range{Range{1, 1}})
+
+	for _, mode := range []Mode{ModeFuzzy, ModeExtended} {
+		chunk := Chunk{
+			&Item{
+				text:        strptr("junegunn"),
+				origText:    strptr("junegunn.choi"),
+				transformed: trans},
+		}
+		pattern.mode = mode
+		matches := pattern.matchChunk(&chunk)
+		if *matches[0].text != "junegunn" || *matches[0].origText != "junegunn.choi" ||
+			matches[0].offsets[0][0] != 0 || matches[0].offsets[0][1] != 5 ||
+			matches[0].transformed != trans {
+			t.Error("Invalid match result", matches)
+		}
+	}
+}

src/reader.go

@@ -0,0 +1,72 @@
+package fzf
+
+import (
+	"bufio"
+	"io"
+	"os"
+	"os/exec"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+// Reader reads from command or standard input
+type Reader struct {
+	pusher   func(string) bool
+	eventBox *util.EventBox
+	delimNil bool
+}
+
+// ReadSource reads data from the default command or from standard input
+func (r *Reader) ReadSource() {
+	if util.IsTty() {
+		cmd := os.Getenv("FZF_DEFAULT_COMMAND")
+		if len(cmd) == 0 {
+			cmd = defaultCommand
+		}
+		r.readFromCommand(cmd)
+	} else {
+		r.readFromStdin()
+	}
+	r.eventBox.Set(EvtReadFin, nil)
+}
+
+func (r *Reader) feed(src io.Reader) {
+	delim := byte('\n')
+	if r.delimNil {
+		delim = '\000'
+	}
+	reader := bufio.NewReader(src)
+	for {
+		line, err := reader.ReadString(delim)
+		if line != "" {
+			// "ReadString returns err != nil if and only if the returned data does not end in delim."
+			if err == nil {
+				line = line[:len(line)-1]
+			}
+			if r.pusher(line) {
+				r.eventBox.Set(EvtReadNew, nil)
+			}
+		}
+		if err != nil {
+			break
+		}
+	}
+}
+
+func (r *Reader) readFromStdin() {
+	r.feed(os.Stdin)
+}
+
+func (r *Reader) readFromCommand(cmd string) {
+	listCommand := exec.Command("sh", "-c", cmd)
+	out, err := listCommand.StdoutPipe()
+	if err != nil {
+		return
+	}
+	err = listCommand.Start()
+	if err != nil {
+		return
+	}
+	defer listCommand.Wait()
+	r.feed(out)
+}

src/reader_test.go

@@ -0,0 +1,56 @@
+package fzf
+
+import (
+	"testing"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func TestReadFromCommand(t *testing.T) {
+	strs := []string{}
+	eb := util.NewEventBox()
+	reader := Reader{
+		pusher:   func(s string) bool { strs = append(strs, s); return true },
+		eventBox: eb}
+
+	// Check EventBox
+	if eb.Peek(EvtReadNew) {
+		t.Error("EvtReadNew should not be set yet")
+	}
+
+	// Normal command
+	reader.readFromCommand(`echo abc && echo def`)
+	if len(strs) != 2 || strs[0] != "abc" || strs[1] != "def" {
+		t.Errorf("%s", strs)
+	}
+
+	// Check EventBox again
+	if !eb.Peek(EvtReadNew) {
+		t.Error("EvtReadNew should be set yet")
+	}
+
+	// Wait should return immediately
+	eb.Wait(func(events *util.Events) {
+		if _, found := (*events)[EvtReadNew]; !found {
+			t.Errorf("%s", events)
+		}
+		events.Clear()
+	})
+
+	// EventBox is cleared
+	if eb.Peek(EvtReadNew) {
+		t.Error("EvtReadNew should not be set yet")
+	}
+
+	// Failing command
+	reader.readFromCommand(`no-such-command`)
+	strs = []string{}
+	if len(strs) > 0 {
+		t.Errorf("%s", strs)
+	}
+
+	// Check EventBox again
+	if eb.Peek(EvtReadNew) {
+		t.Error("Command failed. EvtReadNew should be set")
+	}
+}

src/tokenizer.go

@@ -0,0 +1,212 @@
+package fzf
+
+import (
+	"regexp"
+	"strconv"
+	"strings"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+const rangeEllipsis = 0
+
+// Range represents nth-expression
+type Range struct {
+	begin int
+	end   int
+}
+
+// Token contains the tokenized part of the strings and its prefix length
+type Token struct {
+	text         *[]rune
+	prefixLength int
+}
+
+func newRange(begin int, end int) Range {
+	if begin == 1 {
+		begin = rangeEllipsis
+	}
+	if end == -1 {
+		end = rangeEllipsis
+	}
+	return Range{begin, end}
+}
+
+// ParseRange parses nth-expression and returns the corresponding Range object
+func ParseRange(str *string) (Range, bool) {
+	if (*str) == ".." {
+		return newRange(rangeEllipsis, rangeEllipsis), true
+	} else if strings.HasPrefix(*str, "..") {
+		end, err := strconv.Atoi((*str)[2:])
+		if err != nil || end == 0 {
+			return Range{}, false
+		}
+		return newRange(rangeEllipsis, end), true
+	} else if strings.HasSuffix(*str, "..") {
+		begin, err := strconv.Atoi((*str)[:len(*str)-2])
+		if err != nil || begin == 0 {
+			return Range{}, false
+		}
+		return newRange(begin, rangeEllipsis), true
+	} else if strings.Contains(*str, "..") {
+		ns := strings.Split(*str, "..")
+		if len(ns) != 2 {
+			return Range{}, false
+		}
+		begin, err1 := strconv.Atoi(ns[0])
+		end, err2 := strconv.Atoi(ns[1])
+		if err1 != nil || err2 != nil || begin == 0 || end == 0 {
+			return Range{}, false
+		}
+		return newRange(begin, end), true
+	}
+
+	n, err := strconv.Atoi(*str)
+	if err != nil || n == 0 {
+		return Range{}, false
+	}
+	return newRange(n, n), true
+}
+
+func withPrefixLengths(tokens []string, begin int) []Token {
+	ret := make([]Token, len(tokens))
+
+	prefixLength := begin
+	for idx, token := range tokens {
+		// Need to define a new local variable instead of the reused token to take
+		// the pointer to it
+		runes := []rune(token)
+		ret[idx] = Token{text: &runes, prefixLength: prefixLength}
+		prefixLength += len([]rune(token))
+	}
+	return ret
+}
+
+const (
+	awkNil = iota
+	awkBlack
+	awkWhite
+)
+
+func awkTokenizer(input *string) ([]string, int) {
+	// 9, 32
+	ret := []string{}
+	str := []rune{}
+	prefixLength := 0
+	state := awkNil
+	for _, r := range []rune(*input) {
+		white := r == 9 || r == 32
+		switch state {
+		case awkNil:
+			if white {
+				prefixLength++
+			} else {
+				state = awkBlack
+				str = append(str, r)
+			}
+		case awkBlack:
+			str = append(str, r)
+			if white {
+				state = awkWhite
+			}
+		case awkWhite:
+			if white {
+				str = append(str, r)
+			} else {
+				ret = append(ret, string(str))
+				state = awkBlack
+				str = []rune{r}
+			}
+		}
+	}
+	if len(str) > 0 {
+		ret = append(ret, string(str))
+	}
+	return ret, prefixLength
+}
+
+// Tokenize tokenizes the given string with the delimiter
+func Tokenize(str *string, delimiter *regexp.Regexp) []Token {
+	if delimiter == nil {
+		// AWK-style (\S+\s*)
+		tokens, prefixLength := awkTokenizer(str)
+		return withPrefixLengths(tokens, prefixLength)
+	}
+	tokens := delimiter.FindAllString(*str, -1)
+	return withPrefixLengths(tokens, 0)
+}
+
+func joinTokens(tokens *[]Token) *string {
+	ret := ""
+	for _, token := range *tokens {
+		ret += string(*token.text)
+	}
+	return &ret
+}
+
+func joinTokensAsRunes(tokens *[]Token) *[]rune {
+	ret := []rune{}
+	for _, token := range *tokens {
+		ret = append(ret, *token.text...)
+	}
+	return &ret
+}
+
+// Transform is used to transform the input when --with-nth option is given
+func Transform(tokens []Token, withNth []Range) *[]Token {
+	transTokens := make([]Token, len(withNth))
+	numTokens := len(tokens)
+	for idx, r := range withNth {
+		part := []rune{}
+		minIdx := 0
+		if r.begin == r.end {
+			idx := r.begin
+			if idx == rangeEllipsis {
+				part = append(part, *joinTokensAsRunes(&tokens)...)
+			} else {
+				if idx < 0 {
+					idx += numTokens + 1
+				}
+				if idx >= 1 && idx <= numTokens {
+					minIdx = idx - 1
+					part = append(part, *tokens[idx-1].text...)
+				}
+			}
+		} else {
+			var begin, end int
+			if r.begin == rangeEllipsis { // ..N
+				begin, end = 1, r.end
+				if end < 0 {
+					end += numTokens + 1
+				}
+			} else if r.end == rangeEllipsis { // N..
+				begin, end = r.begin, numTokens
+				if begin < 0 {
+					begin += numTokens + 1
+				}
+			} else {
+				begin, end = r.begin, r.end
+				if begin < 0 {
+					begin += numTokens + 1
+				}
+				if end < 0 {
+					end += numTokens + 1
+				}
+			}
+			minIdx = util.Max(0, begin-1)
+			for idx := begin; idx <= end; idx++ {
+				if idx >= 1 && idx <= numTokens {
+					part = append(part, *tokens[idx-1].text...)
+				}
+			}
+		}
+		var prefixLength int
+		if minIdx < numTokens {
+			prefixLength = tokens[minIdx].prefixLength
+		} else {
+			prefixLength = 0
+		}
+		transTokens[idx] = Token{&part, prefixLength}
+	}
+	return &transTokens
+}

src/tokenizer_test.go

@@ -0,0 +1,101 @@
+package fzf
+
+import "testing"
+
+func TestParseRange(t *testing.T) {
+	{
+		i := ".."
+		r, _ := ParseRange(&i)
+		if r.begin != rangeEllipsis || r.end != rangeEllipsis {
+			t.Errorf("%s", r)
+		}
+	}
+	{
+		i := "3.."
+		r, _ := ParseRange(&i)
+		if r.begin != 3 || r.end != rangeEllipsis {
+			t.Errorf("%s", r)
+		}
+	}
+	{
+		i := "3..5"
+		r, _ := ParseRange(&i)
+		if r.begin != 3 || r.end != 5 {
+			t.Errorf("%s", r)
+		}
+	}
+	{
+		i := "-3..-5"
+		r, _ := ParseRange(&i)
+		if r.begin != -3 || r.end != -5 {
+			t.Errorf("%s", r)
+		}
+	}
+	{
+		i := "3"
+		r, _ := ParseRange(&i)
+		if r.begin != 3 || r.end != 3 {
+			t.Errorf("%s", r)
+		}
+	}
+}
+
+func TestTokenize(t *testing.T) {
+	// AWK-style
+	input := "  abc:  def:  ghi  "
+	tokens := Tokenize(&input, nil)
+	if string(*tokens[0].text) != "abc:  " || tokens[0].prefixLength != 2 {
+		t.Errorf("%s", tokens)
+	}
+
+	// With delimiter
+	tokens = Tokenize(&input, delimiterRegexp(":"))
+	if string(*tokens[0].text) != "  abc:" || tokens[0].prefixLength != 0 {
+		t.Errorf("%s", tokens)
+	}
+}
+
+func TestTransform(t *testing.T) {
+	input := "  abc:  def:  ghi:  jkl"
+	{
+		tokens := Tokenize(&input, nil)
+		{
+			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")
+			tx := Transform(tokens, ranges)
+			if *joinTokens(tx) != "abc:  def:  ghi:  def:  ghi:  jklabc:  " ||
+				len(*tx) != 4 ||
+				string(*(*tx)[0].text) != "abc:  def:  " || (*tx)[0].prefixLength != 2 ||
+				string(*(*tx)[1].text) != "ghi:  " || (*tx)[1].prefixLength != 14 ||
+				string(*(*tx)[2].text) != "def:  ghi:  jkl" || (*tx)[2].prefixLength != 8 ||
+				string(*(*tx)[3].text) != "abc:  " || (*tx)[3].prefixLength != 2 {
+				t.Errorf("%s", *tx)
+			}
+		}
+	}
+	{
+		tokens := Tokenize(&input, delimiterRegexp(":"))
+		{
+			ranges := splitNth("1..2,3,2..,1")
+			tx := Transform(tokens, ranges)
+			if *joinTokens(tx) != "  abc:  def:  ghi:  def:  ghi:  jkl  abc:" ||
+				len(*tx) != 4 ||
+				string(*(*tx)[0].text) != "  abc:  def:" || (*tx)[0].prefixLength != 0 ||
+				string(*(*tx)[1].text) != "  ghi:" || (*tx)[1].prefixLength != 12 ||
+				string(*(*tx)[2].text) != "  def:  ghi:  jkl" || (*tx)[2].prefixLength != 6 ||
+				string(*(*tx)[3].text) != "  abc:" || (*tx)[3].prefixLength != 0 {
+				t.Errorf("%s", *tx)
+			}
+		}
+	}
+}
+
+func TestTransformIndexOutOfBounds(t *testing.T) {
+	Transform([]Token{}, splitNth("1"))
+}

src/update_assets.rb

@@ -0,0 +1,42 @@
+#!/usr/bin/env ruby
+
+# http://www.rubydoc.info/github/rest-client/rest-client/RestClient
+require 'rest_client'
+
+if ARGV.length < 3
+  puts "usage: #$0 <token> <version> <files...>"
+  exit 1
+end
+
+token, version, *files = ARGV
+base = "https://api.github.com/repos/junegunn/fzf-bin/releases"
+
+# List releases
+rels = JSON.parse(RestClient.get(base, :authorization => "token #{token}"))
+rel = rels.find { |r| r['tag_name'] == version }
+unless rel
+  puts "#{version} not found"
+  exit 1
+end
+
+# List assets
+assets = Hash[rel['assets'].map { |a| a.values_at *%w[name id] }]
+
+files.select { |f| File.exists? f }.each do |file|
+  name = File.basename file
+
+  if asset_id = assets[name]
+    puts "#{name} found. Deleting asset id #{asset_id}."
+    RestClient.delete "#{base}/assets/#{asset_id}",
+      :authorization => "token #{token}"
+  else
+    puts "#{name} not found"
+  end
+
+  puts "Uploading #{name}"
+  RestClient.post(
+    "#{base.sub 'api', 'uploads'}/#{rel['id']}/assets?name=#{name}",
+    File.read(file),
+    :authorization => "token #{token}",
+    :content_type  => "application/octet-stream")
+end

src/util/atomicbool.go

@@ -0,0 +1,32 @@
+package util
+
+import "sync"
+
+// AtomicBool is a boxed-class that provides synchronized access to the
+// underlying boolean value
+type AtomicBool struct {
+	mutex sync.Mutex
+	state bool
+}
+
+// NewAtomicBool returns a new AtomicBool
+func NewAtomicBool(initialState bool) *AtomicBool {
+	return &AtomicBool{
+		mutex: sync.Mutex{},
+		state: initialState}
+}
+
+// Get returns the current boolean value synchronously
+func (a *AtomicBool) Get() bool {
+	a.mutex.Lock()
+	defer a.mutex.Unlock()
+	return a.state
+}
+
+// Set updates the boolean value synchronously
+func (a *AtomicBool) Set(newState bool) bool {
+	a.mutex.Lock()
+	defer a.mutex.Unlock()
+	a.state = newState
+	return a.state
+}

src/util/atomicbool_test.go

@@ -0,0 +1,17 @@
+package util
+
+import "testing"
+
+func TestAtomicBool(t *testing.T) {
+	if !NewAtomicBool(true).Get() || NewAtomicBool(false).Get() {
+		t.Error("Invalid initial value")
+	}
+
+	ab := NewAtomicBool(true)
+	if ab.Set(false) {
+		t.Error("Invalid return value")
+	}
+	if ab.Get() {
+		t.Error("Invalid state")
+	}
+}

src/util/eventbox.go

@@ -0,0 +1,96 @@
+package util
+
+import "sync"
+
+// EventType is the type for fzf events
+type EventType int
+
+// Events is a type that associates EventType to any data
+type Events map[EventType]interface{}
+
+// EventBox is used for coordinating events
+type EventBox struct {
+	events Events
+	cond   *sync.Cond
+	ignore map[EventType]bool
+}
+
+// NewEventBox returns a new EventBox
+func NewEventBox() *EventBox {
+	return &EventBox{
+		events: make(Events),
+		cond:   sync.NewCond(&sync.Mutex{}),
+		ignore: make(map[EventType]bool)}
+}
+
+// Wait blocks the goroutine until signaled
+func (b *EventBox) Wait(callback func(*Events)) {
+	b.cond.L.Lock()
+	defer b.cond.L.Unlock()
+
+	if len(b.events) == 0 {
+		b.cond.Wait()
+	}
+
+	callback(&b.events)
+}
+
+// Set turns on the event type on the box
+func (b *EventBox) Set(event EventType, value interface{}) {
+	b.cond.L.Lock()
+	defer b.cond.L.Unlock()
+	b.events[event] = value
+	if _, found := b.ignore[event]; !found {
+		b.cond.Broadcast()
+	}
+}
+
+// Clear clears the events
+// Unsynchronized; should be called within Wait routine
+func (events *Events) Clear() {
+	for event := range *events {
+		delete(*events, event)
+	}
+}
+
+// Peek peeks at the event box if the given event is set
+func (b *EventBox) Peek(event EventType) bool {
+	b.cond.L.Lock()
+	defer b.cond.L.Unlock()
+	_, ok := b.events[event]
+	return ok
+}
+
+// Watch deletes the events from the ignore list
+func (b *EventBox) Watch(events ...EventType) {
+	b.cond.L.Lock()
+	defer b.cond.L.Unlock()
+	for _, event := range events {
+		delete(b.ignore, event)
+	}
+}
+
+// Unwatch adds the events to the ignore list
+func (b *EventBox) Unwatch(events ...EventType) {
+	b.cond.L.Lock()
+	defer b.cond.L.Unlock()
+	for _, event := range events {
+		b.ignore[event] = true
+	}
+}
+
+// WaitFor blocks the execution until the event is received
+func (b *EventBox) WaitFor(event EventType) {
+	looping := true
+	for looping {
+		b.Wait(func(events *Events) {
+			for evt := range *events {
+				switch evt {
+				case event:
+					looping = false
+					return
+				}
+			}
+		})
+	}
+}

src/util/eventbox_test.go

@@ -0,0 +1,61 @@
+package util
+
+import "testing"
+
+// fzf events
+const (
+	EvtReadNew EventType = iota
+	EvtReadFin
+	EvtSearchNew
+	EvtSearchProgress
+	EvtSearchFin
+	EvtClose
+)
+
+func TestEventBox(t *testing.T) {
+	eb := NewEventBox()
+
+	// Wait should return immediately
+	ch := make(chan bool)
+
+	go func() {
+		eb.Set(EvtReadNew, 10)
+		ch <- true
+		<-ch
+		eb.Set(EvtSearchNew, 10)
+		eb.Set(EvtSearchNew, 15)
+		eb.Set(EvtSearchNew, 20)
+		eb.Set(EvtSearchProgress, 30)
+		ch <- true
+		<-ch
+		eb.Set(EvtSearchFin, 40)
+		ch <- true
+		<-ch
+	}()
+
+	count := 0
+	sum := 0
+	looping := true
+	for looping {
+		<-ch
+		eb.Wait(func(events *Events) {
+			for _, value := range *events {
+				switch val := value.(type) {
+				case int:
+					sum += val
+					looping = sum < 100
+				}
+			}
+			events.Clear()
+		})
+		ch <- true
+		count++
+	}
+
+	if count != 3 {
+		t.Error("Invalid number of events", count)
+	}
+	if sum != 100 {
+		t.Error("Invalid sum", sum)
+	}
+}

src/util/util.go

@@ -0,0 +1,90 @@
+package util
+
+// #include <unistd.h>
+import "C"
+
+import (
+	"os"
+	"time"
+)
+
+// Max returns the largest integer
+func Max(first int, items ...int) int {
+	max := first
+	for _, item := range items {
+		if item > max {
+			max = item
+		}
+	}
+	return max
+}
+
+// Max32 returns the smallest 32-bit integer
+func Min32(first int32, second int32) int32 {
+	if first <= second {
+		return first
+	}
+	return second
+}
+
+// Max32 returns the largest 32-bit integer
+func Max32(first int32, second int32) int32 {
+	if first > second {
+		return first
+	}
+	return second
+}
+
+// Constrain32 limits the given 32-bit integer with the upper and lower bounds
+func Constrain32(val int32, min int32, max int32) int32 {
+	if val < min {
+		return min
+	}
+	if val > max {
+		return max
+	}
+	return val
+}
+
+// Constrain limits the given integer with the upper and lower bounds
+func Constrain(val int, min int, max int) int {
+	if val < min {
+		return min
+	}
+	if val > max {
+		return max
+	}
+	return val
+}
+
+// DurWithin limits the given time.Duration with the upper and lower bounds
+func DurWithin(
+	val time.Duration, min time.Duration, max time.Duration) time.Duration {
+	if val < min {
+		return min
+	}
+	if val > max {
+		return max
+	}
+	return val
+}
+
+func Between(val int, min int, max int) bool {
+	return val >= min && val <= max
+}
+
+// IsTty returns true is stdin is a terminal
+func IsTty() bool {
+	return int(C.isatty(C.int(os.Stdin.Fd()))) != 0
+}
+
+func TrimRight(runes *[]rune) []rune {
+	var i int
+	for i = len(*runes) - 1; i >= 0; i-- {
+		char := (*runes)[i]
+		if char != ' ' && char != '\t' {
+			break
+		}
+	}
+	return (*runes)[0 : i+1]
+}

src/util/util_test.go

@@ -0,0 +1,22 @@
+package util
+
+import "testing"
+
+func TestMax(t *testing.T) {
+	if Max(-2, 5, 1, 4, 3) != 5 {
+		t.Error("Invalid result")
+	}
+}
+
+func TestContrain(t *testing.T) {
+	if Constrain(-3, -1, 3) != -1 {
+		t.Error("Expected", -1)
+	}
+	if Constrain(2, -1, 3) != 2 {
+		t.Error("Expected", 2)
+	}
+
+	if Constrain(5, -1, 3) != 3 {
+		t.Error("Expected", 3)
+	}
+}

test/fzf.vader

@@ -0,0 +1,40 @@
+Execute (Setup):
+  let g:dir = fnamemodify(g:vader_file, ':p:h')
+  Log 'Test directory: ' . g:dir
+
+Execute (fzf#run with dir option):
+  let cwd = getcwd()
+  let result = fzf#run({ 'options': '--filter=vdr', 'dir': g:dir })
+  AssertEqual ['fzf.vader'], result
+  AssertEqual getcwd(), cwd
+
+  let result = sort(fzf#run({ 'options': '--filter e', 'dir': g:dir }))
+  AssertEqual ['fzf.vader', 'test_go.rb'], result
+  AssertEqual getcwd(), cwd
+
+Execute (fzf#run with Funcref command):
+  let g:ret = []
+  function! g:FzfTest(e)
+    call add(g:ret, a:e)
+  endfunction
+  let result = sort(fzf#run({ 'sink': function('g:FzfTest'), 'options': '--filter e', 'dir': g:dir }))
+  AssertEqual ['fzf.vader', 'test_go.rb'], result
+  AssertEqual ['fzf.vader', 'test_go.rb'], sort(g:ret)
+
+Execute (fzf#run with string source):
+  let result = sort(fzf#run({ 'source': 'echo hi', 'options': '-f i' }))
+  AssertEqual ['hi'], result
+
+Execute (fzf#run with list source):
+  let result = sort(fzf#run({ 'source': ['hello', 'world'], 'options': '-f e' }))
+  AssertEqual ['hello'], result
+  let result = sort(fzf#run({ 'source': ['hello', 'world'], 'options': '-f o' }))
+  AssertEqual ['hello', 'world'], result
+
+Execute (fzf#run with string source):
+  let result = sort(fzf#run({ 'source': 'echo hi', 'options': '-f i' }))
+  AssertEqual ['hi'], result
+
+Execute (Cleanup):
+  unlet g:dir
+  Restore

test/test_go.rb

@@ -0,0 +1,986 @@
+#!/usr/bin/env ruby
+# encoding: utf-8
+
+require 'minitest/autorun'
+require 'fileutils'
+
+DEFAULT_TIMEOUT = 20
+
+base = File.expand_path('../../', __FILE__)
+Dir.chdir base
+FZF = "#{base}/bin/fzf"
+
+class NilClass
+  def include? str
+    false
+  end
+
+  def start_with? str
+    false
+  end
+
+  def end_with? str
+    false
+  end
+end
+
+def wait
+  since = Time.now
+  while Time.now - since < DEFAULT_TIMEOUT
+    return if yield
+    sleep 0.05
+  end
+  throw 'timeout'
+end
+
+class Shell
+  class << self
+    def bash
+      'PS1= PROMPT_COMMAND= bash --rcfile ~/.fzf.bash'
+    end
+
+    def zsh
+      FileUtils.mkdir_p '/tmp/fzf-zsh'
+      FileUtils.cp File.expand_path('~/.fzf.zsh'), '/tmp/fzf-zsh/.zshrc'
+      'PS1= PROMPT_COMMAND= HISTSIZE=100 ZDOTDIR=/tmp/fzf-zsh zsh'
+    end
+  end
+end
+
+class Tmux
+  TEMPNAME = '/tmp/fzf-test.txt'
+
+  attr_reader :win
+
+  def initialize shell = :bash
+    @win =
+      case shell
+      when :bash
+        go("new-window -d -P -F '#I' '#{Shell.bash}'").first
+      when :zsh
+        go("new-window -d -P -F '#I' '#{Shell.zsh}'").first
+      when :fish
+        go("new-window -d -P -F '#I' 'fish'").first
+      else
+        raise "Unknown shell: #{shell}"
+      end
+    @lines = `tput lines`.chomp.to_i
+
+    if shell == :fish
+      send_keys('function fish_prompt; end; clear', :Enter)
+      self.until { |lines| lines.empty? }
+    end
+  end
+
+  def kill
+    go("kill-window -t #{win} 2> /dev/null")
+  end
+
+  def send_keys *args
+    target =
+      if args.last.is_a?(Hash)
+        hash = args.pop
+        go("select-window -t #{win}")
+        "#{win}.#{hash[:pane]}"
+      else
+        win
+      end
+    args = args.map { |a| %{"#{a}"} }.join ' '
+    go("send-keys -t #{target} #{args}")
+  end
+
+  def capture pane = 0
+    File.unlink TEMPNAME while File.exists? TEMPNAME
+    wait do
+      go("capture-pane -t #{win}.#{pane} \\; save-buffer #{TEMPNAME} 2> /dev/null")
+      $?.exitstatus == 0
+    end
+    File.read(TEMPNAME).split($/)[0, @lines].reverse.drop_while(&:empty?).reverse
+  end
+
+  def until pane = 0
+    lines = nil
+    begin
+      wait do
+        lines = capture(pane)
+        class << lines
+          def item_count
+            self[-2] ? self[-2].strip.split('/').last.to_i : 0
+          end
+        end
+        yield lines
+      end
+    rescue Exception
+      puts $!.backtrace
+      puts '>' * 80
+      puts lines
+      puts '<' * 80
+      raise
+    end
+    lines
+  end
+
+  def prepare
+    tries = 0
+    begin
+      self.send_keys 'C-u', 'hello', 'Right'
+      self.until { |lines| lines[-1].end_with?('hello') }
+    rescue Exception
+      (tries += 1) < 5 ? retry : raise
+    end
+    self.send_keys 'C-u'
+  end
+private
+  def go *args
+    %x[tmux #{args.join ' '}].split($/)
+  end
+end
+
+class TestBase < Minitest::Test
+  TEMPNAME = '/tmp/output'
+
+  attr_reader :tmux
+
+  def tempname
+    [TEMPNAME,
+     caller_locations.map(&:label).find { |l| l =~ /^test_/ }].join '-'
+  end
+
+  def setup
+    ENV.delete 'FZF_DEFAULT_OPTS'
+    ENV.delete 'FZF_CTRL_T_COMMAND'
+    ENV.delete 'FZF_DEFAULT_COMMAND'
+  end
+
+  def readonce
+    wait { File.exists?(tempname) }
+    File.read(tempname)
+  ensure
+    File.unlink tempname while File.exists?(tempname)
+    tmux.prepare
+  end
+
+  def fzf(*opts)
+    fzf!(*opts) + " > #{tempname}.tmp; mv #{tempname}.tmp #{tempname}"
+  end
+
+  def fzf!(*opts)
+    opts = opts.map { |o|
+      case o
+      when Symbol
+        o = o.to_s
+        o.length > 1 ? "--#{o.gsub('_', '-')}" : "-#{o}"
+      when String, Numeric
+        o.to_s
+      else
+        nil
+      end
+    }.compact
+    "#{FZF} #{opts.join ' '}"
+  end
+end
+
+class TestGoFZF < TestBase
+  def setup
+    super
+    @tmux = Tmux.new
+  end
+
+  def teardown
+    @tmux.kill
+  end
+
+  def test_vanilla
+    tmux.send_keys "seq 1 100000 | #{fzf}", :Enter
+    tmux.until { |lines| lines.last =~ /^>/ && lines[-2] =~ /^  100000/ }
+    lines = tmux.capture
+    assert_equal '  2',             lines[-4]
+    assert_equal '> 1',             lines[-3]
+    assert_equal '  100000/100000', lines[-2]
+    assert_equal '>',               lines[-1]
+
+    # Testing basic key bindings
+    tmux.send_keys '99', 'C-a', '1', 'C-f', '3', 'C-b', 'C-h', 'C-u', 'C-e', 'C-y', 'C-k', 'Tab', 'BTab'
+    tmux.until { |lines| lines[-2] == '  856/100000' }
+    lines = tmux.capture
+    assert_equal '> 1391',       lines[-4]
+    assert_equal '  391',        lines[-3]
+    assert_equal '  856/100000', lines[-2]
+    assert_equal '> 391',        lines[-1]
+
+    tmux.send_keys :Enter
+    assert_equal '1391', readonce.chomp
+  end
+
+  def test_fzf_default_command
+    tmux.send_keys "FZF_DEFAULT_COMMAND='echo hello' #{fzf}", :Enter
+    tmux.until { |lines| lines.last =~ /^>/ }
+
+    tmux.send_keys :Enter
+    assert_equal 'hello', readonce.chomp
+  end
+
+  def test_key_bindings
+    tmux.send_keys "#{FZF} -q 'foo bar foo-bar'", :Enter
+    tmux.until { |lines| lines.last =~ /^>/ }
+
+    # CTRL-A
+    tmux.send_keys "C-A", "("
+    tmux.until { |lines| lines.last == '> (foo bar foo-bar' }
+
+    # META-F
+    tmux.send_keys :Escape, :f, ")"
+    tmux.until { |lines| lines.last == '> (foo) bar foo-bar' }
+
+    # CTRL-B
+    tmux.send_keys "C-B", "var"
+    tmux.until { |lines| lines.last == '> (foovar) bar foo-bar' }
+
+    # Left, CTRL-D
+    tmux.send_keys :Left, :Left, "C-D"
+    tmux.until { |lines| lines.last == '> (foovr) bar foo-bar' }
+
+    # META-BS
+    tmux.send_keys :Escape, :BSpace
+    tmux.until { |lines| lines.last == '> (r) bar foo-bar' }
+
+    # CTRL-Y
+    tmux.send_keys "C-Y", "C-Y"
+    tmux.until { |lines| lines.last == '> (foovfoovr) bar foo-bar' }
+
+    # META-B
+    tmux.send_keys :Escape, :b, :Space, :Space
+    tmux.until { |lines| lines.last == '> (  foovfoovr) bar foo-bar' }
+
+    # CTRL-F / Right
+    tmux.send_keys 'C-F', :Right, '/'
+    tmux.until { |lines| lines.last == '> (  fo/ovfoovr) bar foo-bar' }
+
+    # CTRL-H / BS
+    tmux.send_keys 'C-H', :BSpace
+    tmux.until { |lines| lines.last == '> (  fovfoovr) bar foo-bar' }
+
+    # CTRL-E
+    tmux.send_keys "C-E", 'baz'
+    tmux.until { |lines| lines.last == '> (  fovfoovr) bar foo-barbaz' }
+
+    # CTRL-U
+    tmux.send_keys "C-U"
+    tmux.until { |lines| lines.last == '>' }
+
+    # CTRL-Y
+    tmux.send_keys "C-Y"
+    tmux.until { |lines| lines.last == '> (  fovfoovr) bar foo-barbaz' }
+
+    # CTRL-W
+    tmux.send_keys "C-W", "bar-foo"
+    tmux.until { |lines| lines.last == '> (  fovfoovr) bar bar-foo' }
+
+    # META-D
+    tmux.send_keys :Escape, :b, :Escape, :b, :Escape, :d, "C-A", "C-Y"
+    tmux.until { |lines| lines.last == '> bar(  fovfoovr) bar -foo' }
+
+    # CTRL-M
+    tmux.send_keys "C-M"
+    tmux.until { |lines| lines.last !~ /^>/ }
+  end
+
+  def test_multi_order
+    tmux.send_keys "seq 1 10 | #{fzf :multi}", :Enter
+    tmux.until { |lines| lines.last =~ /^>/ }
+
+    tmux.send_keys :Tab, :Up, :Up, :Tab, :Tab, :Tab, # 3, 2
+                   'C-K', 'C-K', 'C-K', 'C-K', :BTab, :BTab, # 5, 6
+                   :PgUp, 'C-J', :Down, :Tab, :Tab # 8, 7
+    tmux.until { |lines| lines[-2].include? '(6)' }
+    tmux.send_keys "C-M"
+    assert_equal %w[3 2 5 6 8 7], readonce.split($/)
+  end
+
+  def test_with_nth
+    [true, false].each do |multi|
+      tmux.send_keys "(echo '  1st 2nd 3rd/';
+                       echo '  first second third/') |
+                       #{fzf multi && :multi, :x, :nth, 2, :with_nth, '2,-1,1'}",
+                      :Enter
+      tmux.until { |lines| lines[-2].include?('2/2') }
+
+      # Transformed list
+      lines = tmux.capture
+      assert_equal '  second third/first', lines[-4]
+      assert_equal '> 2nd 3rd/1st',        lines[-3]
+
+      # However, the output must not be transformed
+      if multi
+        tmux.send_keys :BTab, :BTab
+        tmux.until { |lines| lines[-2].include?('(2)') }
+        tmux.send_keys :Enter
+        assert_equal ['  1st 2nd 3rd/', '  first second third/'], readonce.split($/)
+      else
+        tmux.send_keys '^', '3'
+        tmux.until { |lines| lines[-2].include?('1/2') }
+        tmux.send_keys :Enter
+        assert_equal ['  1st 2nd 3rd/'], readonce.split($/)
+      end
+    end
+  end
+
+  def test_scroll
+    [true, false].each do |rev|
+      tmux.send_keys "seq 1 100 | #{fzf rev && :reverse}", :Enter
+      tmux.until { |lines| lines.include? '  100/100' }
+      tmux.send_keys *110.times.map { rev ? :Down : :Up }
+      tmux.until { |lines| lines.include? '> 100' }
+      tmux.send_keys :Enter
+      assert_equal '100', readonce.chomp
+    end
+  end
+
+  def test_select_1
+    tmux.send_keys "seq 1 100 | #{fzf :with_nth, '..,..', :print_query, :q, 5555, :'1'}", :Enter
+    assert_equal ['5555', '55'], readonce.split($/)
+  end
+
+  def test_exit_0
+    tmux.send_keys "seq 1 100 | #{fzf :with_nth, '..,..', :print_query, :q, 555555, :'0'}", :Enter
+    assert_equal ['555555'], readonce.split($/)
+  end
+
+  def test_select_1_exit_0_fail
+    [:'0', :'1', [:'1', :'0']].each do |opt|
+      tmux.send_keys "seq 1 100 | #{fzf :print_query, :multi, :q, 5, *opt}", :Enter
+      tmux.until { |lines| lines.last =~ /^> 5/ }
+      tmux.send_keys :BTab, :BTab, :BTab
+      tmux.until { |lines| lines[-2].include?('(3)') }
+      tmux.send_keys :Enter
+      assert_equal ['5', '5', '15', '25'], readonce.split($/)
+    end
+  end
+
+  def test_query_unicode
+    tmux.send_keys "(echo abc; echo 가나다) | #{fzf :query, '가다'}", :Enter
+    tmux.until { |lines| lines[-2].include? '1/2' }
+    tmux.send_keys :Enter
+    assert_equal ['가나다'], readonce.split($/)
+  end
+
+  def test_sync
+    tmux.send_keys "seq 1 100 | #{fzf! :multi} | awk '{print \\$1 \\$1}' | #{fzf :sync}", :Enter
+    tmux.until { |lines| lines[-1] == '>' }
+    tmux.send_keys 9
+    tmux.until { |lines| lines[-2] == '  19/100' }
+    tmux.send_keys :BTab, :BTab, :BTab
+    tmux.until { |lines| lines[-2].include?('(3)') }
+    tmux.send_keys :Enter
+    tmux.until { |lines| lines[-1] == '>' }
+    tmux.send_keys 'C-K', :Enter
+    assert_equal ['1919'], readonce.split($/)
+  end
+
+  def test_tac
+    tmux.send_keys "seq 1 1000 | #{fzf :tac, :multi}", :Enter
+    tmux.until { |lines| lines[-2].include? '1000/1000' }
+    tmux.send_keys :BTab, :BTab, :BTab
+    tmux.until { |lines| lines[-2].include?('(3)') }
+    tmux.send_keys :Enter
+    assert_equal %w[1000 999 998], readonce.split($/)
+  end
+
+  def test_tac_sort
+    tmux.send_keys "seq 1 1000 | #{fzf :tac, :multi}", :Enter
+    tmux.until { |lines| lines[-2].include? '1000/1000' }
+    tmux.send_keys '99'
+    tmux.send_keys :BTab, :BTab, :BTab
+    tmux.until { |lines| lines[-2].include?('(3)') }
+    tmux.send_keys :Enter
+    assert_equal %w[99 999 998], readonce.split($/)
+  end
+
+  def test_tac_nosort
+    tmux.send_keys "seq 1 1000 | #{fzf :tac, :no_sort, :multi}", :Enter
+    tmux.until { |lines| lines[-2].include? '1000/1000' }
+    tmux.send_keys '00'
+    tmux.until { |lines| lines[-2].include? '10/1000' }
+    tmux.send_keys :BTab, :BTab, :BTab
+    tmux.until { |lines| lines[-2].include?('(3)') }
+    tmux.send_keys :Enter
+    assert_equal %w[1000 900 800], readonce.split($/)
+  end
+
+  def test_expect
+    test = lambda do |key, feed, expected = key|
+      tmux.send_keys "seq 1 100 | #{fzf :expect, key}", :Enter
+      tmux.until { |lines| lines[-2].include? '100/100' }
+      tmux.send_keys '55'
+      tmux.until { |lines| lines[-2].include? '1/100' }
+      tmux.send_keys *feed
+      assert_equal [expected, '55'], readonce.split($/)
+    end
+    test.call 'ctrl-t', 'C-T'
+    test.call 'ctrl-t', 'Enter', ''
+    test.call 'alt-c', [:Escape, :c]
+    test.call 'f1', 'f1'
+    test.call 'f2', 'f2'
+    test.call 'f3', 'f3'
+    test.call 'f2,f4', 'f2', 'f2'
+    test.call 'f2,f4', 'f4', 'f4'
+    test.call '@', '@'
+  end
+
+  def test_expect_print_query
+    tmux.send_keys "seq 1 100 | #{fzf '--expect=alt-z', :print_query}", :Enter
+    tmux.until { |lines| lines[-2].include? '100/100' }
+    tmux.send_keys '55'
+    tmux.until { |lines| lines[-2].include? '1/100' }
+    tmux.send_keys :Escape, :z
+    assert_equal ['55', 'alt-z', '55'], readonce.split($/)
+  end
+
+  def test_expect_print_query_select_1
+    tmux.send_keys "seq 1 100 | #{fzf '-q55 -1 --expect=alt-z --print-query'}", :Enter
+    assert_equal ['55', '', '55'], readonce.split($/)
+  end
+
+  def test_toggle_sort
+    ['--toggle-sort=ctrl-r', '--bind=ctrl-r:toggle-sort'].each do |opt|
+      tmux.send_keys "seq 1 111 | #{fzf "-m +s --tac #{opt} -q11"}", :Enter
+      tmux.until { |lines| lines[-3].include? '> 111' }
+      tmux.send_keys :Tab
+      tmux.until { |lines| lines[-2].include? '4/111   (1)' }
+      tmux.send_keys 'C-R'
+      tmux.until { |lines| lines[-3].include? '> 11' }
+      tmux.send_keys :Tab
+      tmux.until { |lines| lines[-2].include? '4/111/S (2)' }
+      tmux.send_keys :Enter
+      assert_equal ['111', '11'], readonce.split($/)
+    end
+  end
+
+  def test_unicode_case
+    writelines tempname, %w[строКА1 СТРОКА2 строка3 Строка4]
+    assert_equal %w[СТРОКА2 Строка4], `cat #{tempname} | #{FZF} -fС`.split($/)
+    assert_equal %w[строКА1 СТРОКА2 строка3 Строка4], `cat #{tempname} | #{FZF} -fс`.split($/)
+  end
+
+  def test_tiebreak
+    input = %w[
+      --foobar--------
+      -----foobar---
+      ----foobar--
+      -------foobar-
+    ]
+    writelines tempname, input
+
+    assert_equal input, `cat #{tempname} | #{FZF} -ffoobar --tiebreak=index`.split($/)
+
+    by_length = %w[
+      ----foobar--
+      -----foobar---
+      -------foobar-
+      --foobar--------
+    ]
+    assert_equal by_length, `cat #{tempname} | #{FZF} -ffoobar`.split($/)
+    assert_equal by_length, `cat #{tempname} | #{FZF} -ffoobar --tiebreak=length`.split($/)
+
+    by_begin = %w[
+      --foobar--------
+      ----foobar--
+      -----foobar---
+      -------foobar-
+    ]
+    assert_equal by_begin, `cat #{tempname} | #{FZF} -ffoobar --tiebreak=begin`.split($/)
+    assert_equal by_begin, `cat #{tempname} | #{FZF} -f"!z foobar" -x --tiebreak begin`.split($/)
+
+    assert_equal %w[
+      -------foobar-
+      ----foobar--
+      -----foobar---
+      --foobar--------
+    ], `cat #{tempname} | #{FZF} -ffoobar --tiebreak end`.split($/)
+
+    assert_equal input, `cat #{tempname} | #{FZF} -f"!z" -x --tiebreak end`.split($/)
+  end
+
+  def test_invalid_cache
+    tmux.send_keys "(echo d; echo D; echo x) | #{fzf '-q d'}", :Enter
+    tmux.until { |lines| lines[-2].include? '2/3' }
+    tmux.send_keys :BSpace
+    tmux.until { |lines| lines[-2].include? '3/3' }
+    tmux.send_keys :D
+    tmux.until { |lines| lines[-2].include? '1/3' }
+    tmux.send_keys :Enter
+  end
+
+  def test_smart_case_for_each_term
+    assert_equal 1, `echo Foo bar | #{FZF} -x -f "foo Fbar" | wc -l`.to_i
+  end
+
+  def test_bind
+    tmux.send_keys "seq 1 1000 | #{
+      fzf '-m --bind=ctrl-j:accept,u:up,T:toggle-up,t:toggle'}", :Enter
+    tmux.until { |lines| lines[-2].end_with? '/1000' }
+    tmux.send_keys 'uuu', 'TTT', 'tt', 'uu', 'ttt', 'C-j'
+    assert_equal %w[4 5 6 9], readonce.split($/)
+  end
+
+  def test_long_line
+    data = '.' * 256 * 1024
+    File.open(tempname, 'w') do |f|
+      f << data
+    end
+    assert_equal data, `cat #{tempname} | #{FZF} -f .`.chomp
+  end
+
+  def test_read0
+    lines = `find .`.split($/)
+    assert_equal lines.last, `find . | #{FZF} -e -f "^#{lines.last}$"`.chomp
+    assert_equal lines.last, `find . -print0 | #{FZF} --read0 -e -f "^#{lines.last}$"`.chomp
+  end
+
+  def test_select_all_deselect_all_toggle_all
+    tmux.send_keys "seq 100 | #{fzf '--bind ctrl-a:select-all,ctrl-d:deselect-all,ctrl-t:toggle-all --multi'}", :Enter
+    tmux.until { |lines| lines[-2].include? '100/100' }
+    tmux.send_keys :BTab, :BTab, :BTab
+    tmux.until { |lines| lines[-2].include? '(3)' }
+    tmux.send_keys 'C-t'
+    tmux.until { |lines| lines[-2].include? '(97)' }
+    tmux.send_keys 'C-a'
+    tmux.until { |lines| lines[-2].include? '(100)' }
+    tmux.send_keys :Tab, :Tab
+    tmux.until { |lines| lines[-2].include? '(98)' }
+    tmux.send_keys 'C-d'
+    tmux.until { |lines| !lines[-2].include? '(' }
+    tmux.send_keys :Tab, :Tab
+    tmux.until { |lines| lines[-2].include? '(2)' }
+    tmux.send_keys 0
+    tmux.until { |lines| lines[-2].include? '10/100' }
+    tmux.send_keys 'C-a'
+    tmux.until { |lines| lines[-2].include? '(12)' }
+    tmux.send_keys :Enter
+    assert_equal %w[2 1 10 20 30 40 50 60 70 80 90 100], readonce.split($/)
+  end
+
+  def test_history
+    history_file = '/tmp/fzf-test-history'
+
+    # History with limited number of entries
+    File.unlink history_file rescue nil
+    opts = "--history=#{history_file} --history-size=4"
+    input = %w[00 11 22 33 44].map { |e| e + $/ }
+    input.each do |keys|
+      tmux.send_keys "seq 100 | #{fzf opts}", :Enter
+      tmux.until { |lines| lines[-2].include? '100/100' }
+      tmux.send_keys keys
+      tmux.until { |lines| lines[-2].include? '1/100' }
+      tmux.send_keys :Enter
+      readonce
+    end
+    assert_equal input[1..-1], File.readlines(history_file)
+
+    # Update history entries (not changed on disk)
+    tmux.send_keys "seq 100 | #{fzf opts}", :Enter
+    tmux.until { |lines| lines[-2].include? '100/100' }
+    tmux.send_keys 'C-p'
+    tmux.until { |lines| lines[-1].end_with? '> 44' }
+    tmux.send_keys 'C-p'
+    tmux.until { |lines| lines[-1].end_with? '> 33' }
+    tmux.send_keys :BSpace
+    tmux.until { |lines| lines[-1].end_with? '> 3' }
+    tmux.send_keys 1
+    tmux.until { |lines| lines[-1].end_with? '> 31' }
+    tmux.send_keys 'C-p'
+    tmux.until { |lines| lines[-1].end_with? '> 22' }
+    tmux.send_keys 'C-n'
+    tmux.until { |lines| lines[-1].end_with? '> 31' }
+    tmux.send_keys 0
+    tmux.until { |lines| lines[-1].end_with? '> 310' }
+    tmux.send_keys :Enter
+    readonce
+    assert_equal %w[22 33 44 310].map { |e| e + $/ }, File.readlines(history_file)
+
+    # Respect --bind option
+    tmux.send_keys "seq 100 | #{fzf opts + ' --bind ctrl-p:next-history,ctrl-n:previous-history'}", :Enter
+    tmux.until { |lines| lines[-2].include? '100/100' }
+    tmux.send_keys 'C-n', 'C-n', 'C-n', 'C-n', 'C-p'
+    tmux.until { |lines| lines[-1].end_with?('33') }
+    tmux.send_keys :Enter
+  ensure
+    File.unlink history_file
+  end
+
+  def test_execute
+    output = '/tmp/fzf-test-execute'
+    opts = %[--bind \\"alt-a:execute(echo '[{}]' >> #{output}),alt-b:execute[echo '({}), ({})' >> #{output}],C:execute:echo '({}), [{}], @{}@' >> #{output}\\"]
+    tmux.send_keys "seq 100 | #{fzf opts}", :Enter
+    tmux.until { |lines| lines[-2].include? '100/100' }
+    tmux.send_keys :Escape, :a, :Escape, :a
+    tmux.send_keys :Up
+    tmux.send_keys :Escape, :b, :Escape, :b
+    tmux.send_keys :Up
+    tmux.send_keys :C
+    tmux.send_keys 'foobar'
+    tmux.until { |lines| lines[-2].include? '0/100' }
+    tmux.send_keys :Escape, :a, :Escape, :b, :Escape, :c
+    tmux.send_keys :Enter
+    readonce
+    assert_equal ['["1"]', '["1"]', '("2"), ("2")', '("2"), ("2")', '("3"), ["3"], @"3"@'],
+      File.readlines(output).map(&:chomp)
+  ensure
+    File.unlink output rescue nil
+  end
+
+  def test_cycle
+    tmux.send_keys "seq 8 | #{fzf :cycle}", :Enter
+    tmux.until { |lines| lines[-2].include? '8/8' }
+    tmux.send_keys :Down
+    tmux.until { |lines| lines[-10].start_with? '>' }
+    tmux.send_keys :Down
+    tmux.until { |lines| lines[-9].start_with? '>' }
+    tmux.send_keys :PgUp
+    tmux.until { |lines| lines[-10].start_with? '>' }
+    tmux.send_keys :PgUp
+    tmux.until { |lines| lines[-3].start_with? '>' }
+    tmux.send_keys :Up
+    tmux.until { |lines| lines[-4].start_with? '>' }
+    tmux.send_keys :PgDn
+    tmux.until { |lines| lines[-3].start_with? '>' }
+    tmux.send_keys :PgDn
+    tmux.until { |lines| lines[-10].start_with? '>' }
+  end
+
+  def test_header_lines
+    tmux.send_keys "seq 100 | #{fzf '--header-lines=10 -q 5'}", :Enter
+    2.times do
+      tmux.until do |lines|
+        lines[-2].include?('/90') &&
+        lines[-3]  == '  1' &&
+        lines[-4]  == '  2' &&
+        lines[-13] == '> 15'
+      end
+      tmux.send_keys :Down
+    end
+    tmux.send_keys :Enter
+    assert_equal '15', readonce.chomp
+  end
+
+  def test_header_lines_reverse
+    tmux.send_keys "seq 100 | #{fzf '--header-lines=10 -q 5 --reverse'}", :Enter
+    2.times do
+      tmux.until do |lines|
+        lines[1].include?('/90') &&
+        lines[2]  == '  1' &&
+        lines[3]  == '  2' &&
+        lines[12] == '> 15'
+      end
+      tmux.send_keys :Up
+    end
+    tmux.send_keys :Enter
+    assert_equal '15', readonce.chomp
+  end
+
+  def test_header_lines_overflow
+    tmux.send_keys "seq 100 | #{fzf '--header-lines=200'}", :Enter
+    tmux.until do |lines|
+      lines[-2].include?('0/0') &&
+      lines[-3].include?('  1')
+    end
+    tmux.send_keys :Enter
+    assert_equal '', readonce.chomp
+  end
+
+  def test_header_lines_with_nth
+    tmux.send_keys "seq 100 | #{fzf "--header-lines 5 --with-nth 1,1,1,1,1"}", :Enter
+    tmux.until do |lines|
+      lines[-2].include?('95/95') &&
+      lines[-3] == '  11111' &&
+      lines[-7] == '  55555' &&
+      lines[-8] == '> 66666'
+    end
+    tmux.send_keys :Enter
+    assert_equal '6', readonce.chomp
+  end
+
+  def test_header_file
+    tmux.send_keys "seq 100 | #{fzf "--header-file <(head -5 #{__FILE__})"}", :Enter
+    header = File.readlines(__FILE__).take(5).map(&:strip)
+    tmux.until do |lines|
+      lines[-2].include?('100/100') &&
+      lines[-7..-3].map(&:strip) == header
+    end
+  end
+
+  def test_header_file_reverse
+    tmux.send_keys "seq 100 | #{fzf "--header-file=<(head -5 #{__FILE__}) --reverse"}", :Enter
+    header = File.readlines(__FILE__).take(5).map(&:strip)
+    tmux.until do |lines|
+      lines[1].include?('100/100') &&
+      lines[2..6].map(&:strip) == header
+    end
+  end
+
+  def test_canel
+    tmux.send_keys "seq 10 | #{fzf "--bind 2:cancel"}", :Enter
+    tmux.until { |lines| lines[-2].include?('10/10') }
+    tmux.send_keys '123'
+    tmux.until { |lines| lines[-1] == '> 3' && lines[-2].include?('1/10') }
+    tmux.send_keys 'C-y', 'C-y'
+    tmux.until { |lines| lines[-1] == '> 311' }
+    tmux.send_keys 2
+    tmux.until { |lines| lines[-1] == '>' }
+    tmux.send_keys 2
+    tmux.prepare
+  end
+
+  def test_margin
+    tmux.send_keys "yes | head -1000 | #{fzf "--margin 5,3"}", :Enter
+    tmux.until { |lines| lines[4] == '' && lines[5] == '     y' }
+    tmux.send_keys :Enter
+  end
+
+  def test_margin_reverse
+    tmux.send_keys "seq 1000 | #{fzf "--margin 7,5 --reverse"}", :Enter
+    tmux.until { |lines| lines[1 + 7] == '       1000/1000' }
+    tmux.send_keys :Enter
+  end
+
+private
+  def writelines path, lines
+    File.unlink path while File.exists? path
+    File.open(path, 'w') { |f| f << lines.join($/) }
+  end
+end
+
+module TestShell
+  def setup
+    super
+  end
+
+  def teardown
+    @tmux.kill
+  end
+
+  def set_var name, val
+    tmux.prepare
+    tmux.send_keys "export #{name}='#{val}'", :Enter
+    tmux.prepare
+  end
+
+  def test_ctrl_t
+    tmux.prepare
+    tmux.send_keys 'C-t', pane: 0
+    lines = tmux.until(1) { |lines| lines.item_count > 1 }
+    expected = lines.values_at(-3, -4).map { |line| line[2..-1] }.join(' ')
+    tmux.send_keys :BTab, :BTab, pane: 1
+    tmux.until(1) { |lines| lines[-2].include?('(2)') }
+    tmux.send_keys :Enter, pane: 1
+    tmux.until(0) { |lines| lines[-1].include? expected }
+    tmux.send_keys 'C-c'
+
+    # FZF_TMUX=0
+    new_shell
+    tmux.send_keys 'C-t', pane: 0
+    lines = tmux.until(0) { |lines| lines.item_count > 1 }
+    expected = lines.values_at(-3, -4).map { |line| line[2..-1] }.join(' ')
+    tmux.send_keys :BTab, :BTab, pane: 0
+    tmux.until(0) { |lines| lines[-2].include?('(2)') }
+    tmux.send_keys :Enter, pane: 0
+    tmux.until(0) { |lines| lines[-1].include? expected }
+    tmux.send_keys 'C-c', 'C-d'
+  end
+
+  def test_ctrl_t_command
+    set_var "FZF_CTRL_T_COMMAND", "seq 100"
+    tmux.send_keys 'C-t', pane: 0
+    lines = tmux.until(1) { |lines| lines.item_count == 100 }
+    tmux.send_keys :BTab, :BTab, :BTab, pane: 1
+    tmux.until(1) { |lines| lines[-2].include?('(3)') }
+    tmux.send_keys :Enter, pane: 1
+    tmux.until(0) { |lines| lines[-1].include? '1 2 3' }
+  end
+
+  def test_alt_c
+    tmux.prepare
+    tmux.send_keys :Escape, :c, pane: 0
+    lines = tmux.until(1) { |lines| lines.item_count > 0 && lines[-3][2..-1] }
+    expected = lines[-3][2..-1]
+    tmux.send_keys :Enter, pane: 1
+    tmux.prepare
+    tmux.send_keys :pwd, :Enter
+    tmux.until { |lines| lines[-1].end_with?(expected) }
+  end
+
+  def test_ctrl_r
+    tmux.prepare
+    tmux.send_keys 'echo 1st', :Enter; tmux.prepare
+    tmux.send_keys 'echo 2nd', :Enter; tmux.prepare
+    tmux.send_keys 'echo 3d',  :Enter; tmux.prepare
+    tmux.send_keys 'echo 3rd', :Enter; tmux.prepare
+    tmux.send_keys 'echo 4th', :Enter; tmux.prepare
+    tmux.send_keys 'C-r', pane: 0
+    tmux.until(1) { |lines| lines.item_count > 0 }
+    tmux.send_keys '3d', pane: 1
+    tmux.until(1) { |lines| lines[-3].end_with? 'echo 3rd' } # --no-sort
+    tmux.send_keys :Enter, pane: 1
+    tmux.until { |lines| lines[-1] == 'echo 3rd' }
+    tmux.send_keys :Enter
+    tmux.until { |lines| lines[-1] == '3rd' }
+  end
+end
+
+module CompletionTest
+  def test_file_completion
+    FileUtils.mkdir_p '/tmp/fzf-test'
+    FileUtils.mkdir_p '/tmp/fzf test'
+    (1..100).each { |i| FileUtils.touch "/tmp/fzf-test/#{i}" }
+    ['no~such~user', '/tmp/fzf test/foobar', '~/.fzf-home'].each do |f|
+      FileUtils.touch File.expand_path(f)
+    end
+    tmux.prepare
+    tmux.send_keys 'cat /tmp/fzf-test/10**', :Tab, pane: 0
+    tmux.until(1) { |lines| lines.item_count > 0 }
+    tmux.send_keys :BTab, :BTab
+    tmux.until(1) { |lines| lines[-2].include?('(2)') }
+    tmux.send_keys :Enter
+    tmux.until do |lines|
+      tmux.send_keys 'C-L'
+      lines[-1].include?('/tmp/fzf-test/10') &&
+      lines[-1].include?('/tmp/fzf-test/100')
+    end
+
+    # ~USERNAME**<TAB>
+    tmux.send_keys 'C-u'
+    tmux.send_keys "cat ~#{ENV['USER']}**", :Tab, pane: 0
+    tmux.until(1) { |lines| lines.item_count > 0 }
+    tmux.send_keys '.fzf-home'
+    tmux.until(1) { |lines| lines[-3].end_with? '.fzf-home' }
+    tmux.send_keys :Enter
+    tmux.until do |lines|
+      tmux.send_keys 'C-L'
+      lines[-1].end_with?('.fzf-home')
+    end
+
+    # ~INVALID_USERNAME**<TAB>
+    tmux.send_keys 'C-u'
+    tmux.send_keys "cat ~such**", :Tab, pane: 0
+    tmux.until(1) { |lines| lines[-3].end_with? 'no~such~user' }
+    tmux.send_keys :Enter
+    tmux.until do |lines|
+      tmux.send_keys 'C-L'
+      lines[-1].end_with?('no~such~user')
+    end
+
+    # /tmp/fzf\ test**<TAB>
+    tmux.send_keys 'C-u'
+    tmux.send_keys 'cat /tmp/fzf\ test/**', :Tab, pane: 0
+    tmux.until(1) { |lines| lines.item_count > 0 }
+    tmux.send_keys :Enter
+    tmux.until do |lines|
+      tmux.send_keys 'C-L'
+      lines[-1].end_with?('/tmp/fzf\ test/foobar')
+    end
+  ensure
+    ['/tmp/fzf-test', '/tmp/fzf test', '~/.fzf-home', 'no~such~user'].each do |f|
+      FileUtils.rm_rf File.expand_path(f)
+    end
+  end
+
+  def test_dir_completion
+    tmux.send_keys 'mkdir -p /tmp/fzf-test/d{1..100}; touch /tmp/fzf-test/d55/xxx', :Enter
+    tmux.prepare
+    tmux.send_keys 'cd /tmp/fzf-test/**', :Tab, pane: 0
+    tmux.until(1) { |lines| lines.item_count > 0 }
+    tmux.send_keys :BTab, :BTab # BTab does not work here
+    tmux.send_keys 55
+    tmux.until(1) { |lines| lines[-2].start_with? '  1/' }
+    tmux.send_keys :Enter
+    tmux.until do |lines|
+      tmux.send_keys 'C-L'
+      lines[-1] == 'cd /tmp/fzf-test/d55/'
+    end
+    tmux.send_keys :xx
+    tmux.until { |lines| lines[-1] == 'cd /tmp/fzf-test/d55/xx' }
+
+    # Should not match regular files (bash-only)
+    if self.class == TestBash
+      tmux.send_keys :Tab
+      tmux.until { |lines| lines[-1] == 'cd /tmp/fzf-test/d55/xx' }
+    end
+
+    # Fail back to plusdirs
+    tmux.send_keys :BSpace, :BSpace, :BSpace
+    tmux.until { |lines| lines[-1] == 'cd /tmp/fzf-test/d55' }
+    tmux.send_keys :Tab
+    tmux.until { |lines| lines[-1] == 'cd /tmp/fzf-test/d55/' }
+  end
+
+  def test_process_completion
+    tmux.send_keys 'sleep 12345 &', :Enter
+    lines = tmux.until { |lines| lines[-1].start_with? '[1]' }
+    pid = lines[-1].split.last
+    tmux.prepare
+    tmux.send_keys 'kill ', :Tab, pane: 0
+    tmux.until(1) { |lines| lines.item_count > 0 }
+    tmux.send_keys 'sleep12345'
+    tmux.until(1) { |lines| lines[-3].include? 'sleep 12345' }
+    tmux.send_keys :Enter
+    tmux.until do |lines|
+      tmux.send_keys 'C-L'
+      lines[-1] == "kill #{pid}"
+    end
+  ensure
+    Process.kill 'KILL', pid.to_i rescue nil if pid
+  end
+end
+
+class TestBash < TestBase
+  include TestShell
+  include CompletionTest
+
+  def new_shell
+    tmux.prepare
+    tmux.send_keys "FZF_TMUX=0 #{Shell.bash}", :Enter
+    tmux.prepare
+  end
+
+  def setup
+    super
+    @tmux = Tmux.new :bash
+  end
+end
+
+class TestZsh < TestBase
+  include TestShell
+  include CompletionTest
+
+  def new_shell
+    tmux.send_keys "FZF_TMUX=0 #{Shell.zsh}", :Enter
+    tmux.prepare
+  end
+
+  def setup
+    super
+    @tmux = Tmux.new :zsh
+  end
+end
+
+class TestFish < TestBase
+  include TestShell
+
+  def new_shell
+    tmux.send_keys 'env FZF_TMUX=0 fish', :Enter
+    tmux.send_keys 'function fish_prompt; end; clear', :Enter
+    tmux.until { |lines| lines.empty? }
+  end
+
+  def set_var name, val
+    tmux.prepare
+    tmux.send_keys "set -g #{name} '#{val}'", :Enter
+    tmux.prepare
+  end
+
+  def setup
+    super
+    @tmux = Tmux.new :fish
+  end
+end
+

uninstall

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+
+confirm() {
+  while [ 1 ]; do
+    read -p "$1" -n 1 -r
+    echo
+    if [[ "$REPLY" =~ ^[Yy] ]]; then
+      return 0
+    elif [[ "$REPLY" =~ ^[Nn] ]]; then
+      return 1
+    fi
+  done
+}
+
+remove() {
+  echo "Remove $1"
+  rm -f "$1"
+}
+
+remove_line() {
+  src=$(readlink "$1")
+  if [ $? -eq 0 ]; then
+    echo "Remove from $1 ($src):"
+  else
+    src=$1
+    echo "Remove from $1:"
+  fi
+
+  shift
+  line_no=1
+  match=0
+  while [ -n "$1" ]; do
+    line=$(sed -n "$line_no,\$p" "$src" | \grep -m1 -nF "$1")
+    if [ $? -ne 0 ]; then
+      shift
+      line_no=1
+      continue
+    fi
+    line_no=$(( $(sed 's/:.*//' <<< "$line") + line_no - 1 ))
+    content=$(sed 's/^[0-9]*://' <<< "$line")
+    match=1
+    echo    "  - Line #$line_no: $content"
+    [ "$content" = "$1" ] || confirm "    - Remove (y/n) ? "
+    if [ $? -eq 0 ]; then
+      awk -v n=$line_no 'NR == n {next} {print}' "$src" > "$src.bak" &&
+        mv "$src.bak" "$src" || break
+      echo  "      - Removed"
+    else
+      echo  "      - Skipped"
+      line_no=$(( line_no + 1 ))
+    fi
+  done
+  [ $match -eq 0 ] && echo "  - Nothing found"
+  echo
+}
+
+for shell in bash zsh; do
+  remove ~/.fzf.${shell}
+  remove_line ~/.${shell}rc \
+    "[ -f ~/.fzf.${shell} ] && source ~/.fzf.${shell}" \
+    "source ~/.fzf.${shell}"
+done
+
+bind_file=~/.config/fish/functions/fish_user_key_bindings.fish
+if [ -f "$bind_file" ]; then
+  remove_line "$bind_file" "fzf_key_bindings"
+fi
+
+if [ -d ~/.config/fish/functions ]; then
+  remove ~/.config/fish/functions/fzf.fish
+  remove ~/.config/fish/functions/fzf_key_bindings.fish
+
+  if [ "$(ls -A ~/.config/fish/functions)" ]; then
+    echo "Can't delete non-empty directory: \"~/.config/fish/functions\""
+  else
+    rmdir ~/.config/fish/functions
+  fi
+fi
+