fzf ❤️ vim

Things you can do with fzf and Vim.

Rationale

fzf in itself is not a Vim plugin, and the official repository only provides the basic wrapper function for Vim and it's up to the users to write their own Vim commands with it. However, I've learned that many users of fzf are not familiar with Vimscript and are looking for the "default" implementation of the features they can find in the alternative Vim plugins.

This repository is a bundle of fzf-based commands and mappings extracted from my .vimrc to address such needs. They are not designed to be flexible or configurable, and there's no guarantee of backward-compatibility.

Why you should use fzf on Vim

Because you can and you love fzf.

fzf runs asynchronously and can be orders of magnitude faster than similar Vim plugins. However, the benefit may not be noticeable if the size of the input is small, which is the case for many of the commands provided here. Nevertheless I wrote them anyway since it's really easy to implement custom selector with fzf.

fzf is an independent command-line program and thus requires an external terminal emulator when on GVim. You may or may not like the experience. Also note that fzf currently does not compile on Windows.

Installation

Using vim-plug:

Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'junegunn/fzf.vim'

• dir and do options are not mandatory
• Use ./install --bin instead if you don't need fzf outside of Vim
• If you installed fzf using Homebrew, the following should suffice:
  • Plug '/usr/local/opt/fzf' | Plug 'junegunn/fzf.vim'
• Make sure to use Vim 7.4 or above

Commands

Command	List
Files [PATH]	Files (similar to :FZF)
GFiles [OPTS]	Git files (git ls-files)
GFiles?	Git files (git status)
Buffers	Open buffers
Colors	Color schemes
Ag [PATTERN]	ag search result (ALT-A to select all, ALT-D to deselect all)
Lines [QUERY]	Lines in loaded buffers
BLines [QUERY]	Lines in the current buffer
Tags [QUERY]	Tags in the project (ctags -R)
BTags [QUERY]	Tags in the current buffer
Marks	Marks
Windows	Windows
Locate PATTERN	locate command output
History	v:oldfiles and open buffers
History:	Command history
History/	Search history
Snippets	Snippets (UltiSnips)
Commits	Git commits (requires fugitive.vim)
BCommits	Git commits for the current buffer
Commands	Commands
Maps	Normal mode mappings
Helptags	Help tags 1
Filetypes	File types

• Most commands support CTRL-T / CTRL-X / CTRL-V key bindings to open in a new tab, a new split, or in a new vertical split
• Bang-versions of the commands (e.g. Ag!) will open fzf in fullscreen
• You can set g:fzf_command_prefix to give the same prefix to the commands
  • e.g. let g:fzf_command_prefix = 'Fzf' and you have FzfFiles, etc.

(1: Helptags will shadow the command of the same name from pathogen. But its functionality is still available via call pathogen#helptags(). ↩)

Customization

Global options

" This is the default extra key bindings
let g:fzf_action = {
  \ 'ctrl-t': 'tab split',
  \ 'ctrl-x': 'split',
  \ 'ctrl-v': 'vsplit' }

" Default fzf layout
" - down / up / left / right
let g:fzf_layout = { 'down': '~40%' }

" In Neovim, you can set up fzf window using a Vim command
let g:fzf_layout = { 'window': 'enew' }
let g:fzf_layout = { 'window': '-tabnew' }

" Customize fzf colors to match your color scheme
let g:fzf_colors =
\ { 'fg':      ['fg', 'Normal'],
  \ 'bg':      ['bg', 'Normal'],
  \ 'hl':      ['fg', 'Comment'],
  \ 'fg+':     ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
  \ 'bg+':     ['bg', 'CursorLine', 'CursorColumn'],
  \ 'hl+':     ['fg', 'Statement'],
  \ 'info':    ['fg', 'PreProc'],
  \ 'prompt':  ['fg', 'Conditional'],
  \ 'pointer': ['fg', 'Exception'],
  \ 'marker':  ['fg', 'Keyword'],
  \ 'spinner': ['fg', 'Label'],
  \ 'header':  ['fg', 'Comment'] }

" Enable per-command history.
" CTRL-N and CTRL-P will be automatically bound to next-history and
" previous-history instead of down and up. If you don't like the change,
" explicitly bind the keys to down and up in your $FZF_DEFAULT_OPTS.
let g:fzf_history_dir = '~/.local/share/fzf-history'

Command-local options

" [Files] Extra options for fzf
"   e.g. File preview using Highlight
"        (http://www.andre-simon.de/doku/highlight/en/highlight.html)
let g:fzf_files_options =
  \ '--preview "(highlight -O ansi {} || cat {}) 2> /dev/null | head -'.&lines.'"'

" [Buffers] Jump to the existing window if possible
let g:fzf_buffers_jump = 1

" [[B]Commits] Customize the options used by 'git log':
let g:fzf_commits_log_options = '--graph --color=always --format="%C(auto)%h%d %s %C(black)%C(bold)%cr"'

" [Tags] Command to generate tags file
let g:fzf_tags_command = 'ctags -R'

" [Commands] --expect expression for directly executing the command
let g:fzf_commands_expect = 'alt-enter,ctrl-x'

Advanced customization

You can use autoload functions to define your own commands.

" Command for git grep
" - fzf#vim#grep(command, with_column, [options], [fullscreen])
command! -bang -nargs=* GGrep
  \ call fzf#vim#grep('git grep --line-number '.shellescape(<q-args>), 0, <bang>0)

" We use VimEnter event so that the code is run after fzf.vim is loaded
autocmd VimEnter * command! -bang Colors
  \ call fzf#vim#colors({'left': '15%', 'options': '--reverse --margin 30%,0'}, <bang>0)

" Augmenting Ag command using fzf#vim#with_preview function
"   * fzf#vim#with_preview([[options], preview window, [toggle keys...]])
"   * Preview script requires Ruby
"   * Install Highlight or CodeRay to enable syntax highlighting
"
"   :Ag  - Start fzf with hidden preview window that can be enabled with "?" key
"   :Ag! - Start fzf in fullscreen and display the preview window above
autocmd VimEnter * command! -bang -nargs=* Ag
  \ call fzf#vim#ag(<q-args>,
  \                 <bang>0 ? fzf#vim#with_preview('up:60%')
  \                         : fzf#vim#with_preview('right:50%:hidden', '?'),
  \                 <bang>0)

" Similarly, we can apply it to fzf#vim#grep. To use ripgrep instead of ag:
command! -bang -nargs=* Rg
  \ call fzf#vim#grep(
  \   'rg --column --line-number --no-heading --color=always '.shellescape(<q-args>), 1,
  \   <bang>0 ? fzf#vim#with_preview('up:60%')
  \           : fzf#vim#with_preview('right:50%:hidden', '?'),
  \   <bang>0)

Mappings

Mapping	Description
<plug>(fzf-maps-n)	Normal mode mappings
<plug>(fzf-maps-i)	Insert mode mappings
<plug>(fzf-maps-x)	Visual mode mappings
<plug>(fzf-maps-o)	Operator-pending mappings
<plug>(fzf-complete-word)	cat /usr/share/dict/words
<plug>(fzf-complete-path)	Path completion using find (file + dir)
<plug>(fzf-complete-file)	File completion using find
<plug>(fzf-complete-file-ag)	File completion using ag
<plug>(fzf-complete-line)	Line completion (all open buffers)
<plug>(fzf-complete-buffer-line)	Line completion (current buffer only)

Usage

" Mapping selecting mappings
nmap <leader><tab> <plug>(fzf-maps-n)
xmap <leader><tab> <plug>(fzf-maps-x)
omap <leader><tab> <plug>(fzf-maps-o)

" Insert mode completion
imap <c-x><c-k> <plug>(fzf-complete-word)
imap <c-x><c-f> <plug>(fzf-complete-path)
imap <c-x><c-j> <plug>(fzf-complete-file-ag)
imap <c-x><c-l> <plug>(fzf-complete-line)

" Advanced customization using autoload functions
inoremap <expr> <c-x><c-k> fzf#vim#complete#word({'left': '15%'})

Completion helper

fzf#complete is a helper function for creating custom fuzzy completion using fzf. If the first parameter is a command string or a Vim list, it will be used as the source.

" Replace the default dictionary completion with fzf-based fuzzy completion
inoremap <expr> <c-x><c-k> fzf#complete('cat /usr/share/dict/words')

For advanced uses, you can pass an options dictionary to the function. The set of options is pretty much identical to that for fzf#run only with the following exceptions:

• reducer (funcref)
  • Reducer transforms the output lines of fzf into a single string value
• prefix (string or funcref; default: \k*$)
  • Regular expression pattern to extract the completion prefix
  • Or a function to extract completion prefix
• Both source and options can be given as funcrefs that take the completion prefix as the argument and return the final value
• sink or sink* are not allowed

Reducer example

function! s:make_sentence(lines)
  return substitute(join(a:lines), '^.', '\=toupper(submatch(0))', '').'.'
endfunction

inoremap <expr> <c-x><c-s> fzf#complete({
  \ 'source':  'cat /usr/share/dict/words',
  \ 'reducer': function('<sid>make_sentence'),
  \ 'options': '--multi --reverse --margin 15%,0',
  \ 'left':    20})

Status line (neovim)

function! s:fzf_statusline()
  " Override statusline as you like
  highlight fzf1 ctermfg=161 ctermbg=251
  highlight fzf2 ctermfg=23 ctermbg=251
  highlight fzf3 ctermfg=237 ctermbg=251
  setlocal statusline=%#fzf1#\ >\ %#fzf2#fz%#fzf3#f
endfunction

autocmd! User FzfStatusLine call <SID>fzf_statusline()

License

MIT