Examples (vim)

locate command integration

command! -nargs=1 Locate call fzf#run(
      \ {'source': 'locate <q-args>', 'sink': 'e', 'options': '-m'})

:Locate / will list every file on the system. So make sure that you're using Go version of fzf which is significantly faster than the old Ruby version.

Open files in splits

Deprecated. Use CTRL-X/V/T with :FZF command instead.

" Open files in horizontal split
nnoremap <silent> <Leader>s :call fzf#run({
\   'down': '40%',
\   'sink': 'botright split' })<CR>

" Open files in vertical horizontal split
nnoremap <silent> <Leader>v :call fzf#run({
\   'right': winwidth('.') / 2,
\   'sink':  'vertical botright split' })<CR>

Choose color scheme

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':    30
\ })<CR>

Select buffer

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>

Simple MRU search

command! FZFMru call fzf#run({
            \'source': v:oldfiles,
            \'sink' : 'e ',
            \'options' : '-m',
            \})

Jump to tags

command! FZFTag if !empty(tagfiles()) | call fzf#run({
\   'source': "sed '/^\\!/d;s/\t.*//' " . join(tagfiles()) . ' | uniq',
\   'sink':   'tag',
\ }) | else | echo 'No tags' | endif

Search lines in all open vim buffers

function! s:line_handler(l)
  let keys = split(a:l, ':\t')
  exec 'buf' keys[0]
  exec keys[1]
  normal! ^zz
endfunction

function! s:buffer_lines()
  let res = []
  for b in filter(range(1, bufnr('$')), 'buflisted(v:val)')
    call extend(res, map(getbufline(b,0,"$"), 'b . ":\t" . (v:key + 1) . ":\t" . v:val '))
  endfor
  return res
endfunction

command! FZFLines call fzf#run({
\   'source':  <sid>buffer_lines(),
\   'sink':    function('<sid>line_handler'),
\   'options': '--extended --nth=3..',
\   'down':    '60%'
\})

Narrow ag results within vim

function! s:ag_handler(lines)
  if len(a:lines) < 2 | return | endif

  let [key, line] = a:lines[0:1]
  let [file, line, col] = split(line, ':')[0:2]
  let cmd = get({'ctrl-x': 'split', 'ctrl-v': 'vertical split', 'ctrl-t': 'tabe'}, key, 'e')
  execute cmd escape(file, ' %#\')
  execute line
  execute 'normal!' col.'|zz'
endfunction

command! -nargs=1 Ag call fzf#run({
\ 'source':  'ag --nogroup --column --color "'.escape(<q-args>, '"\').'"',
\ 'sink*':    function('<sid>ag_handler'),
\ 'options': '--ansi --expect=ctrl-t,ctrl-v,ctrl-x --no-multi',
\ 'down':    '50%'
\ })

CTRL-X, CTRL-V, CTRL-T to open in a new split, vertical split, tab respectively.

Fuzzy cmdline completion

cnoremap <silent> <c-l> <c-\>eGetCompletions()<cr>
"add an extra <cr> at the end of this line to automatically accept the fzf-selected completions.

function! Lister()
    call extend(g:FZF_Cmd_Completion_Pre_List,split(getcmdline(),'\(\\\zs\)\@<!\& '))
endfunction

function! CmdLineDirComplete(prefix, options, rawdir)
    let l:dirprefix = matchstr(a:rawdir,"^.*/")
    if isdirectory(expand(l:dirprefix))
        return join(a:prefix + map(fzf#run({
                    \'options': a:options . ' --select-1  --query=' .
                    \ a:rawdir[matchend(a:rawdir,"^.*/"):len(a:rawdir)], 
                    \'dir': expand(l:dirprefix)
                    \}), 
                    \'"' . escape(l:dirprefix, " ") . '" . escape(v:val, " ")'))
    else
        return join(a:prefix + map(fzf#run({
                    \'options': a:options . ' --query='. a:rawdir }),
                    \'escape(v:val, " ")')) 
        "dropped --select-1 to speed things up on a long query
endfunction

function! GetCompletions()
    let g:FZF_Cmd_Completion_Pre_List = []
    let l:cmdline_list = split(getcmdline(), '\(\\\zs\)\@<!\& ', 1)
    let l:Prefix = l:cmdline_list[0:-2]
    execute "silent normal! :" . getcmdline() . "\<c-a>\<c-\>eLister()\<cr>\<c-c>"
    let l:FZF_Cmd_Completion_List = g:FZF_Cmd_Completion_Pre_List[len(l:Prefix):-1]
    unlet g:FZF_Cmd_Completion_Pre_List
    if len(l:Prefix) > 0 && l:Prefix[0] =~
                \ '^ed\=i\=t\=$\|^spl\=i\=t\=$\|^tabed\=i\=t\=$\|^arged\=i\=t\=$\|^vsp\=l\=i\=t\=$'
                "single-argument file commands
        return CmdLineDirComplete(l:Prefix, "",l:cmdline_list[-1])
    elseif len(l:Prefix) > 0 && l:Prefix[0] =~ 
                \ '^arg\=s\=$\|^ne\=x\=t\=$\|^sne\=x\=t\=$\|^argad\=d\=$'  
                "multi-argument file commands
        return CmdLineDirComplete(l:Prefix, '--multi', l:cmdline_list[-1])
    else 
        return join(l:Prefix + fzf#run({
                    \'source':l:FZF_Cmd_Completion_List, 
                    \'options': '--select-1 --query='.shellescape(l:cmdline_list[-1])
                    \})) 
    endif
endfunction

hit <c-l> while in the ex commandline (i.e. after pressing :) to have fzf filter a list of vim's commandline auto-completions. Try :colo␣<c-l> (be sure to include the space) or :b␣<c-l>. There are special cases for handling file-searches, so that you can go deeper into the path than just one directory at a time, and so that you can add multiple files to the arglist at once. More special cases could be added. Some limitations: the auto-complete for :help and :tag are limited to 300 entries, so you may need to narrow it a bit.