vim-fugitive/autoload/fugitive.vim

" Location:     autoload/fugitive.vim
" Maintainer:   Tim Pope <http://tpo.pe/>

if exists('g:autoloaded_fugitive')
  finish
endif
let g:autoloaded_fugitive = 1

if !exists('g:fugitive_git_executable')
  let g:fugitive_git_executable = 'git'
endif

" Section: Utility

function! s:function(name) abort
  return function(substitute(a:name,'^s:',matchstr(expand('<sfile>'), '<SNR>\d\+_'),''))
endfunction

function! s:sub(str,pat,rep) abort
  return substitute(a:str,'\v\C'.a:pat,a:rep,'')
endfunction

function! s:gsub(str,pat,rep) abort
  return substitute(a:str,'\v\C'.a:pat,a:rep,'g')
endfunction

function! s:winshell() abort
  return &shell =~? 'cmd' || exists('+shellslash') && !&shellslash
endfunction

function! s:shellesc(arg) abort
  if a:arg =~ '^[A-Za-z0-9_/.-]\+$'
    return a:arg
  elseif s:winshell()
    return '"'.s:gsub(s:gsub(a:arg, '"', '""'), '\%', '"%"').'"'
  else
    return shellescape(a:arg)
  endif
endfunction

function! s:fnameescape(file) abort
  if exists('*fnameescape')
    return fnameescape(a:file)
  else
    return escape(a:file," \t\n*?[{`$\\%#'\"|!<")
  endif
endfunction

function! s:tempname() abort
  let temp = resolve(tempname())
  if has('win32')
    let temp = fnamemodify(fnamemodify(temp, ':h'), ':p').fnamemodify(temp, ':t')
  endif
  return temp
endfunction

function! s:throw(string) abort
  let v:errmsg = 'fugitive: '.a:string
  throw v:errmsg
endfunction

function! s:warn(str) abort
  echohl WarningMsg
  echomsg a:str
  echohl None
  let v:warningmsg = a:str
endfunction

function! s:shellslash(path) abort
  if s:winshell()
    return tr(a:path, '\', '/')
  else
    return a:path
  endif
endfunction

function! s:PlatformSlash(path) abort
  if exists('+shellslash') && !&shellslash
    return tr(a:path, '/', '\')
  else
    return a:path
  endif
endfunction

let s:executables = {}

function! s:executable(binary) abort
  if !has_key(s:executables, a:binary)
    let s:executables[a:binary] = executable(a:binary)
  endif
  return s:executables[a:binary]
endfunction

function! s:git_command() abort
  return get(g:, 'fugitive_git_command', g:fugitive_git_executable)
endfunction

function! s:System(cmd) abort
  try
    return system(a:cmd)
  catch /^Vim\%((\a\+)\)\=:E484:/
    let opts = ['shell', 'shellcmdflag', 'shellredir', 'shellquote', 'shellxquote', 'shellxescape', 'shellslash']
    call filter(opts, 'exists("+".v:val) && !empty(eval("&".v:val))')
    call map(opts, 'v:val."=".eval("&".v:val)')
    call s:throw('failed to run `' . a:cmd . '` with ' . join(opts, ' '))
  endtry
endfunction

function! fugitive#Prepare(...) abort
  let args = copy(a:000)
  if empty(args)
    return g:fugitive_git_executable
  elseif args[0] !~# '^-' && args[0] =~# '[\/.]\|^$'
    let args[0] = '--git-dir=' . args[0]
  endif
  return g:fugitive_git_executable . ' ' . join(map(args, 's:shellesc(v:val)'), ' ')
endfunction

let s:git_versions = {}
function! fugitive#GitVersion(...) abort
  if !has_key(s:git_versions, g:fugitive_git_executable)
    let s:git_versions[g:fugitive_git_executable] = matchstr(system(g:fugitive_git_executable.' --version'), "\\S\\+\\ze\n")
  endif
  return s:git_versions[g:fugitive_git_executable]
endfunction

function! s:TreeChomp(...) abort
  let args = copy(a:000)
  let tree = FugitiveTreeForGitDir(b:git_dir)
  let pre = ''
  if empty(tree)
    let args = ['--git-dir=' . b:git_dir] . args
  elseif s:cpath(tree) !=# s:cpath(getcwd())
    if fugitive#GitVersion() =~# '^[01]\.'
      let pre = 'cd ' . s:shellesc(tree) . (s:winshell() ? ' & ' : '; ')
    else
      let args = ['-C', tree] + args
    endif
  endif
  return s:sub(s:System(pre . call('fugitive#Prepare', args)),'\n$','')
endfunction

function! fugitive#Config(name, ...) abort
  let cmd = fugitive#Prepare(a:0 ? a:1 : get(b:, 'git_dir', ''), 'config', '--get', a:name)
  let out = matchstr(system(cmd), "[^\r\n]*")
  return v:shell_error ? '' : out
endfunction

function! s:Remote(dir) abort
  let head = FugitiveHead(0, a:dir)
  let remote = len(head) ? fugitive#Config('branch.' . head . '.remote') : ''
  let i = 10
  while remote ==# '.' && i > 0
    let head = matchstr(fugitive#Config('branch.' . head . '.merge'), 'refs/heads/\zs.*')
    let remote = len(head) ? fugitive#Config('branch.' . head . '.remote') : ''
    let i -= 1
  endwhile
  return remote =~# '\.\=$' ? 'origin' : remote
endfunction

function! fugitive#RemoteUrl(...) abort
  let dir = a:0 > 1 ? a:2 : get(b:, 'git_dir', '')
  let remote = !a:0 || a:1 =~# '^\.\=$' ? s:Remote(dir) : a:1
  if fugitive#GitVersion() =~# '^[01]\.\|^2\.[0-6]\.'
    return fugitive#Config('remote.' . remote . '.url')
  endif
  let cmd = fugitive#Prepare(dir, 'remote', 'get-url', remote)
  let out = substitute(system(cmd), "\n$", '', '')
  return v:shell_error ? '' : out
endfunction

function! s:recall() abort
  let rev = s:sub(s:buffer().rev(), '^/', '')
  if rev ==# ':'
    return matchstr(getline('.'),'^.\=\t\%([[:alpha:] ]\+: *\)\=\zs.\{-\}\ze\%( ([^()[:digit:]]\+)\)\=$\|^\d\{6} \x\{40\} \d\t\zs.*')
  elseif s:buffer().type('tree')
    let file = matchstr(getline('.'), '\t\zs.*')
    if empty(file) && line('.') > 2
      let file = s:sub(getline('.'), '/$', '')
    endif
    if !empty(file) && rev !~# ':$'
      return rev . '/' . file
    else
      return rev . file
    endif
  endif
  return rev
endfunction

function! s:map(mode, lhs, rhs, ...) abort
  let flags = (a:0 ? a:1 : '') . (a:rhs =~# '<Plug>' ? '' : '<script>')
  let head = a:lhs
  let tail = ''
  let keys = get(g:, a:mode.'remap', {})
  if type(keys) == type([])
    return
  endif
  while !empty(head)
    if has_key(keys, head)
      let head = keys[head]
      if empty(head)
        return
      endif
      break
    endif
    let tail = matchstr(head, '<[^<>]*>$\|.$') . tail
    let head = substitute(head, '<[^<>]*>$\|.$', '', '')
  endwhile
  if flags !~# '<unique>' || empty(mapcheck(head.tail, a:mode))
    exe a:mode.'map <buffer>' flags head.tail a:rhs
    if a:0 > 1
      let b:undo_ftplugin = get(b:, 'undo_ftplugin', 'exe') .
            \ '|sil! exe "' . a:mode . 'unmap <buffer> ' . head.tail . '"'
    endif
  endif
endfunction

function! s:add_methods(namespace, method_names) abort
  for name in a:method_names
    let s:{a:namespace}_prototype[name] = s:function('s:'.a:namespace.'_'.name)
  endfor
endfunction

let s:commands = []
function! s:command(definition) abort
  let s:commands += [a:definition]
endfunction

function! s:define_commands() abort
  for command in s:commands
    exe 'command! -buffer '.command
  endfor
endfunction

let s:abstract_prototype = {}

" Section: Initialization

function! fugitive#Init() abort
  if exists('#User#FugitiveBoot')
    try
      let [save_mls, &modelines] = [&mls, 0]
      doautocmd User FugitiveBoot
    finally
      let &mls = save_mls
    endtry
  endif
  if !exists('g:fugitive_no_maps')
    call s:map('c', '<C-R><C-G>', 'fnameescape(<SID>recall())', '<expr>')
    call s:map('n', 'y<C-G>', ':call setreg(v:register, <SID>recall())<CR>', '<silent>')
  endif
  if expand('%:p') =~# ':[\/][\/]'
    let &l:path = s:sub(&path, '^\.%(,|$)', '')
  endif
  if stridx(&tags, escape(b:git_dir, ', ')) == -1
    if filereadable(b:git_dir.'/tags')
      let &l:tags = escape(b:git_dir.'/tags', ', ').','.&tags
    endif
    if &filetype !=# '' && filereadable(b:git_dir.'/'.&filetype.'.tags')
      let &l:tags = escape(b:git_dir.'/'.&filetype.'.tags', ', ').','.&tags
    endif
  endif
  try
    let [save_mls, &modelines] = [&mls, 0]
    call s:define_commands()
    doautocmd User Fugitive
  finally
    let &mls = save_mls
  endtry
endfunction

function! fugitive#is_git_dir(path) abort
  return FugitiveIsGitDir(a:path)
endfunction

function! fugitive#extract_git_dir(path) abort
  return FugitiveExtractGitDir(a:path)
endfunction

function! fugitive#detect(path) abort
  return FugitiveDetect(a:path)
endfunction

" Section: Repository

let s:repo_prototype = {}
let s:repos = {}

function! s:repo(...) abort
  let dir = a:0 ? a:1 : (exists('b:git_dir') && b:git_dir !=# '' ? b:git_dir : FugitiveExtractGitDir(expand('%:p')))
  if dir !=# ''
    if has_key(s:repos, dir)
      let repo = get(s:repos, dir)
    else
      let repo = {'git_dir': dir}
      let s:repos[dir] = repo
    endif
    return extend(extend(repo, s:repo_prototype, 'keep'), s:abstract_prototype, 'keep')
  endif
  call s:throw('not a git repository: '.expand('%:p'))
endfunction

function! fugitive#repo(...) abort
  return call('s:repo', a:000)
endfunction

function! s:repo_dir(...) dict abort
  return join([self.git_dir]+a:000,'/')
endfunction

function! s:repo_tree(...) dict abort
  let dir = FugitiveTreeForGitDir(self.git_dir)
  if dir ==# ''
    call s:throw('no work tree')
  else
    return join([dir]+a:000,'/')
  endif
endfunction

function! s:repo_bare() dict abort
  if self.dir() =~# '/\.git$'
    return 0
  else
    return FugitiveTreeForGitDir(self.git_dir) ==# ''
  endif
endfunction

function! s:repo_translate(spec, ...) dict abort
  let rev = a:spec
  let dir = self.git_dir
  let tree = FugitiveTreeForGitDir(dir)
  if rev ==# '.'
    let f = empty(tree) ? dir : tree
  elseif rev =~# '^/\=\.git$' && empty(tree)
    let f = dir
  elseif rev =~# '^/\=\.git/'
    let f = dir . s:sub(rev, '^/=\.git', '')
  elseif empty(rev) || rev ==# '/.'
    return self.tree()
  elseif rev =~# '^/'
    let f = self.tree(rev)
  elseif rev =~# '^:[0-3]:/\@!'
    let f = 'fugitive://' . dir . '//' . rev[1] . '/' . rev[3:-1]
  elseif rev ==# ':'
    if $GIT_INDEX_FILE =~# '/[^/]*index[^/]*\.lock$' && s:cpath(fnamemodify($GIT_INDEX_FILE,':p')[0:strlen(dir)]) ==# s:cpath(dir . '/') && filereadable($GIT_INDEX_FILE)
      let f = fnamemodify($GIT_INDEX_FILE, ':p')
    else
      let f = dir . '/index'
    endif
  elseif rev =~# '^:/\@!'
    let f = 'fugitive://' . dir . '//0/' . rev[1:-1]
  else
    if rev =~# 'HEAD\|^refs/' && rev !~# ':'
      let refs = dir . '/refs/'
      if filereadable(dir . '/commondir')
        let refs = simplify(dir . '/' . get(readfile(dir . '/commondir', 1), 0, '')) . '/refs/'
      endif
      if filereadable(refs . '../' . rev)
        let f = simplify(refs . '../' . rev)
      elseif filereadable(refs . rev)
        let f = refs . rev
      endif
    endif
    if !exists('f')
      let commit = substitute(matchstr(rev,'^[^:]\+\|^:.*'), '^@\%($|[^~]\)\@=', 'HEAD', '')
      let file = substitute(matchstr(rev, '^[^:]\+\zs:.*'), '^:', '/', '')
      if commit !~# '^[0-9a-f]\{40\}$'
        let commit = system(fugitive#Prepare(dir, 'rev-parse', '--verify', commit))[0:-2]
        let commit = v:shell_error ? '' : commit
      endif
      if len(commit)
        let f = 'fugitive://' . dir . '//' . commit . file
      else
        let f = self.tree(rev)
      endif
    endif
  endif
  return a:0 && a:1 ? s:PlatformSlash(f) : f
endfunction

function! s:Generate(rev) abort
  return s:repo().translate(a:rev, 1)
endfunction

function! s:repo_head(...) dict abort
    if !filereadable(self.dir('HEAD'))
      return ''
    endif
    let head = readfile(self.dir('HEAD'))[0]

    if head =~# '^ref: '
      let branch = s:sub(head,'^ref: %(refs/%(heads/|remotes/|tags/)=)=','')
    elseif head =~# '^\x\{40\}$'
      " truncate hash to a:1 characters if we're in detached head mode
      let len = a:0 ? a:1 : 0
      let branch = len < 0 ? head : len ? head[0:len-1] : ''
    else
      return ''
    endif

    return branch
endfunction

call s:add_methods('repo',['dir','tree','bare','translate','head'])

function! s:repo_git_command(...) dict abort
  let git = s:git_command() . ' --git-dir='.s:shellesc(self.git_dir)
  return git.join(map(copy(a:000),'" ".s:shellesc(v:val)'),'')
endfunction

function! s:repo_git_chomp(...) dict abort
  return s:sub(s:System(call('fugitive#Prepare', [self.git_dir] + a:000)),'\n$','')
endfunction

function! s:repo_git_chomp_in_tree(...) dict abort
  let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
  let dir = getcwd()
  try
    execute cd s:fnameescape(self.tree())
    return call(self.git_chomp, a:000, self)
  finally
    execute cd s:fnameescape(dir)
  endtry
endfunction

function! s:repo_rev_parse(rev) dict abort
  let hash = self.git_chomp('rev-parse','--verify',a:rev)
  if hash =~ '\<\x\{40\}$'
    return matchstr(hash,'\<\x\{40\}$')
  endif
  call s:throw('rev-parse '.a:rev.': '.hash)
endfunction

call s:add_methods('repo',['git_command','git_chomp','git_chomp_in_tree','rev_parse'])

function! s:repo_superglob(base) dict abort
  if a:base =~# '^/' || a:base !~# ':'
    let results = []
    if a:base !~# '^/'
      let heads = ["HEAD","ORIG_HEAD","FETCH_HEAD","MERGE_HEAD"]
      let heads += sort(split(self.git_chomp("rev-parse","--symbolic","--branches","--tags","--remotes"),"\n"))
      " Add any stashes.
      if filereadable(self.dir('refs/stash'))
        let heads += ["stash"]
        let heads += sort(split(self.git_chomp("stash","list","--pretty=format:%gd"),"\n"))
      endif
      call filter(heads,'v:val[ 0 : strlen(a:base)-1 ] ==# a:base')
      let results += heads
    endif
    if !self.bare()
      let base = s:sub(a:base,'^/','')
      let matches = split(glob(self.tree(s:gsub(base,'/','*&').'*')),"\n")
      call map(matches,'s:shellslash(v:val)')
      call map(matches,'v:val !~ "/$" && isdirectory(v:val) ? v:val."/" : v:val')
      call map(matches,'v:val[ strlen(self.tree())+(a:base !~ "^/") : -1 ]')
      let results += matches
    endif
    return results

  elseif a:base =~# '^:'
    let entries = split(self.git_chomp('ls-files','--stage'),"\n")
    call map(entries,'s:sub(v:val,".*(\\d)\\t(.*)",":\\1:\\2")')
    if a:base !~# '^:[0-3]\%(:\|$\)'
      call filter(entries,'v:val[1] == "0"')
      call map(entries,'v:val[2:-1]')
    endif
    call filter(entries,'v:val[ 0 : strlen(a:base)-1 ] ==# a:base')
    return entries

  else
    let tree = matchstr(a:base,'.*[:/]')
    let entries = split(self.git_chomp('ls-tree',tree),"\n")
    call map(entries,'s:sub(v:val,"^04.*\\zs$","/")')
    call map(entries,'tree.s:sub(v:val,".*\t","")')
    return filter(entries,'v:val[ 0 : strlen(a:base)-1 ] ==# a:base')
  endif
endfunction

call s:add_methods('repo',['superglob'])

function! s:repo_config(name) dict abort
  return fugitive#Config(a:name, self.git_dir)
endfunction

function! s:repo_user() dict abort
  let username = self.config('user.name')
  let useremail = self.config('user.email')
  return username.' <'.useremail.'>'
endfunction

call s:add_methods('repo',['config', 'user'])

" Section: Buffer

function! s:DirCommitFile(path) abort
  let vals = matchlist(s:shellslash(a:path), '\c^fugitive:\%(//\)\=\(.\{-\}\)\%(//\|::\)\(\x\{40\}\|[0-3]\)\(/.*\)\=$')
  if empty(vals)
    return ['', '', '']
  endif
  return vals[1:3]
endfunction

function! s:DirRev(url) abort
  let [dir, commit, file] = s:DirCommitFile(a:url)
  return [dir, (commit =~# '^.$' ? ':' : '') . commit . substitute(file, '^/', ':', '')]
endfunction

function! fugitive#Real(url) abort
  let [dir, commit, file] = s:DirCommitFile(a:url)
  if len(dir)
    let tree = FugitiveTreeForGitDir(dir)
    return s:PlatformSlash((len(tree) ? tree : dir) . file)
  endif
  let url = fnamemodify(a:url, ':p' . (a:url =~# '[\/]$' ? '' : ':s?[\/]$??'))
  if url =~# '^[\\/]\|^\a:[\\/]'
    return s:PlatformSlash(url)
  endif
  return ''
endfunction

function! fugitive#Path(url, ...) abort
  if !a:0
    return fugitive#Real(a:url)
  endif
  let url = fnamemodify(a:url, ':p')
  let dir = a:0 > 1 ? a:2 : get(b:, 'git_dir', '')
  let tree = FugitiveTreeForGitDir(dir)
  let [argdir, commit, file] = s:DirCommitFile(a:url)
  if len(argdir) && s:cpath(argdir) !=# s:cpath(dir)
    let file = ''
  elseif len(dir) && s:cpath(url[0 : len(dir)]) ==# s:cpath(dir . '/')
    let file = '/.git'.url[strlen(dir) : -1]
  elseif len(tree) && s:cpath(url[0 : len(tree)]) ==# s:cpath(tree . '/')
    let file = url[len(tree) : -1]
  endif
  if empty(file) && a:1 ==# ''
    return s:shellslash(fugitive#Real(a:url))
  endif
  return substitute(file, '^/', a:1, '')
endfunction

let s:trees = {}
let s:indexes = {}
function! s:TreeInfo(dir, commit) abort
  let git = fugitive#Prepare(a:dir)
  if a:commit =~# '^:\=[0-3]$'
    let index = get(s:indexes, a:dir, [])
    let newftime = getftime(a:dir . '/index')
    if get(index, 0, -1) < newftime
      let out = system(git . ' ls-files --stage')
      let s:indexes[a:dir] = [newftime, {'0': {}, '1': {}, '2': {}, '3': {}}]
      if v:shell_error
        return [{}, -1]
      endif
      for line in split(out, "\n")
        let [info, filename] = split(line, "\t")
        let [mode, sha, stage] = split(info, '\s\+')
        let s:indexes[a:dir][1][stage][filename] = [newftime, mode, 'blob', sha, -2]
        while filename =~# '/'
          let filename = substitute(filename, '/[^/]*$', '', '')
          let s:indexes[a:dir][1][stage][filename] = [newftime, '040000', 'tree', '', 0]
        endwhile
      endfor
    endif
    return [get(s:indexes[a:dir][1], a:commit[-1:-1], {}), newftime]
  elseif a:commit =~# '^\x\{40\}$'
    if !has_key(s:trees, a:dir)
      let ftime = +system(git . ' log -1 --pretty=format:%ct ' . a:commit)
      if v:shell_error
        let s:trees[a:dir] = [{}, -1]
        return s:trees[a:dir]
      endif
      let s:trees[a:dir] = [{}, +ftime]
      let out = system(git . ' ls-tree -rtl --full-name ' . a:commit)
      if v:shell_error
        return s:trees[a:dir]
      endif
      for line in split(out, "\n")
        let [info, filename] = split(line, "\t")
        let [mode, type, sha, size] = split(info, '\s\+')
        let s:trees[a:dir][0][filename] = [ftime, mode, type, sha, +size, filename]
      endfor
    endif
    return s:trees[a:dir]
  endif
  return [{}, -1]
endfunction

function! s:PathInfo(url) abort
  let [dir, commit, file] = s:DirCommitFile(a:url)
  if empty(dir) || !get(g:, 'fugitive_file_api', 1)
    return [-1, '000000', '', '', -1]
  endif
  let path = substitute(file[1:-1], '/*$', '', '')
  let [tree, ftime] = s:TreeInfo(dir, commit)
  let entry = empty(path) ? [ftime, '040000', 'tree', '', -1] : get(tree, path, [])
  if empty(entry) || file =~# '/$' && entry[1] !=# 'tree'
    return [-1, '000000', '', '', -1]
  else
    return entry
  endif
endfunction

function! fugitive#simplify(url) abort
  let [dir, commit, file] = s:DirCommitFile(a:url)
  if empty(dir)
    return ''
  endif
  if file =~# '/\.\.\%(/\|$\)'
    let tree = FugitiveTreeForGitDir(dir)
    if len(tree)
      let path = simplify(tree . file)
      if strpart(path . '/', 0, len(tree) + 1) !=# tree . '/'
        return s:PlatformSlash(path)
      endif
    endif
  endif
  return s:PlatformSlash('fugitive://' . simplify(dir) . '//' . commit . simplify(file))
endfunction

function! fugitive#resolve(url) abort
  let url = fugitive#simplify(a:url)
  if url =~? '^fugitive:'
    return url
  else
    return resolve(url)
  endif
endfunction

function! fugitive#getftime(url) abort
  return s:PathInfo(a:url)[0]
endfunction

function! fugitive#getfsize(url) abort
  let entry = s:PathInfo(a:url)
  if entry[4] == -2 && entry[2] ==# 'blob' && len(entry[3])
    let dir = s:DirCommitFile(a:url)[0]
    let size = +system(fugitive#Prepare(dir, 'cat-file', '-s', entry[3]))
    let entry[4] = v:shell_error ? -1 : size
  endif
  return entry[4]
endfunction

function! fugitive#getftype(url) abort
  return get({'tree': 'dir', 'blob': 'file'}, s:PathInfo(a:url)[2], '')
endfunction

function! fugitive#filereadable(url) abort
  return s:PathInfo(a:url)[2] ==# 'blob'
endfunction

function! fugitive#filewritable(url) abort
  let [dir, commit, file] = s:DirCommitFile(a:url)
  if commit !~# '^\d$' || !filewritable(dir . '/index')
    return 0
  endif
  return s:PathInfo(a:url)[2] ==# 'blob' ? 1 : 2
endfunction

function! fugitive#isdirectory(url) abort
  return s:PathInfo(a:url)[2] ==# 'tree'
endfunction

function! fugitive#getfperm(url) abort
  let [dir, commit, file] = s:DirCommitFile(a:url)
  let perm = getfperm(dir)
  let fperm = s:PathInfo(a:url)[1]
  if fperm ==# '040000'
    let fperm = '000755'
  endif
  if fperm !~# '[15]'
    let perm = tr(perm, 'x', '-')
  endif
  if fperm !~# '[45]$'
    let perm = tr(perm, 'rw', '--')
  endif
  if commit !~# '^\d$'
    let perm = tr(perm, 'w', '-')
  endif
  return perm ==# '---------' ? '' : perm
endfunction

function! fugitive#setfperm(url, perm) abort
  let [dir, commit, file] = s:DirCommitFile(a:url)
  let entry = s:PathInfo(a:url)
  let perm = fugitive#getfperm(a:url)
  if commit !~# '^\d$' || entry[2] !=# 'blob' ||
      \ substitute(perm, 'x', '-', 'g') !=# substitute(a:perm, 'x', '-', 'g')
    return -2
  endif
  call system(fugitive#Prepare(dir, 'update-index', '--index-info'),
        \ (a:perm =~# 'x' ? '000755 ' : '000644 ') . entry[3] . ' ' . commit . "\t" . file[1:-1])
  return v:shell_error ? -1 : 0
endfunction

function! s:TempCmd(out, cmd) abort
  let prefix = ''
  try
    let cmd = (type(a:cmd) == type([]) ? call('fugitive#Prepare', a:cmd) : a:cmd)
    let redir = ' > ' . a:out
    if s:winshell()
      let cmd_escape_char = &shellxquote == '(' ?  '^' : '^^^'
      return s:System('cmd /c "' . prefix . s:gsub(cmd, '[<>]', cmd_escape_char . '&') . redir . '"')
    elseif &shell =~# 'fish'
      return s:System(' begin;' . prefix . cmd . redir . ';end ')
    else
      return s:System(' (' . prefix . cmd . redir . ') ')
    endif
  endtry
endfunction

if !exists('s:blobdirs')
  let s:blobdirs = {}
endif
function! s:BlobTemp(url) abort
  let [dir, commit, file] = s:DirCommitFile(a:url)
  if empty(file)
    return ''
  endif
  if !has_key(s:blobdirs, dir)
    let s:blobdirs[dir] = s:tempname()
  endif
  let tempfile = s:PlatformSlash(s:blobdirs[dir] . '/' . commit . file)
  let tempparent = fnamemodify(tempfile, ':h')
  if !isdirectory(tempparent)
    call mkdir(tempparent, 'p')
  endif
  if commit =~# '^\d$' || !filereadable(tempfile)
    let rev = s:DirRev(a:url)[1]
    let command = fugitive#Prepare(dir, 'cat-file', 'blob', rev)
    call s:TempCmd(tempfile, command)
    if v:shell_error
      call delete(tempfile)
      return ''
    endif
  endif
  return tempfile
endfunction

function! fugitive#readfile(url, ...) abort
  let entry = s:PathInfo(a:url)
  if entry[2] !=# 'blob'
    return []
  endif
  let temp = s:BlobTemp(a:url)
  if empty(temp)
    return []
  endif
  return call('readfile', [temp] + a:000)
endfunction

function! fugitive#writefile(lines, url, ...) abort
  let url = type(a:url) ==# type('') ? a:url : ''
  let [dir, commit, file] = s:DirCommitFile(url)
  let entry = s:PathInfo(url)
  if commit =~# '^\d$' && entry[2] !=# 'tree'
    let temp = s:tempname()
    if a:0 && a:1 =~# 'a' && entry[2] ==# 'blob'
      call writefile(fugitive#readfile(url, 'b'), temp, 'b')
    endif
    call call('writefile', [a:lines, temp] + a:000)
    let hash = system(fugitive#Prepare(dir, 'hash-object', '-w', temp))[0:-2]
    let mode = len(entry[1]) ? entry[1] : '100644'
    if !v:shell_error && hash =~# '^\x\{40\}$'
      call system(fugitive#Prepare(dir, 'update-index', '--index-info'),
            \ mode . ' ' . hash . ' ' . commit . "\t" . file[1:-1])
      if !v:shell_error
        return 0
      endif
    endif
  endif
  return call('writefile', [a:lines, a:url] + a:000)
endfunction

let s:globsubs = {'*': '[^/]*', '**': '.*', '**/': '\%(.*/\)\=', '?': '[^/]'}
function! fugitive#glob(url, ...) abort
  let [dirglob, commit, glob] = s:DirCommitFile(a:url)
  let append = matchstr(glob, '/*$')
  let glob = substitute(glob, '/*$', '', '')
  let pattern = '^' . substitute(glob[1:-1], '\*\*/\=\|[.?*\^$]', '\=get(s:globsubs, submatch(0), "\\" . submatch(0))', 'g') . '$'
  let results = []
  for dir in dirglob =~# '[*?]' ? split(glob(dirglob), "\n") : [dirglob]
    if empty(dir) || !get(g:, 'fugitive_file_api', 1) || !filereadable(dir . '/HEAD')
      continue
    endif
    let files = items(s:TreeInfo(dir, commit)[0])
    if len(append)
      call filter(files, 'v:val[1][2] ==# "tree"')
    endif
    call map(files, 'v:val[0]')
    call filter(files, 'v:val =~# pattern')
    let prepend = 'fugitive://' . dir . '//' . substitute(commit, '^:', '', '') . '/'
    call sort(files)
    call map(files, 's:PlatformSlash(prepend . v:val . append)')
    call extend(results, files)
  endfor
  if a:0 > 1 && a:2
    return results
  else
    return join(results, "\n")
  endif
endfunction

function! fugitive#delete(url, ...) abort
  let [dir, commit, file] = s:DirCommitFile(a:url)
  if a:0 && len(a:1) || commit !~# '^\d$'
    return -1
  endif
  let entry = s:PathInfo(a:url)
  if entry[2] !=# 'blob'
    return -1
  endif
  call system(fugitive#Prepare(dir, 'update-index', '--index-info'),
        \ '000000 0000000000000000000000000000000000000000 ' . commit . "\t" . file[1:-1])
  return v:shell_error ? -1 : 0
endfunction

let s:buffer_prototype = {}

function! s:buffer(...) abort
  let buffer = {'#': bufnr(a:0 ? a:1 : '%')}
  call extend(extend(buffer,s:buffer_prototype,'keep'),s:abstract_prototype,'keep')
  if buffer.getvar('git_dir') !=# ''
    return buffer
  endif
  call s:throw('not a git repository: '.bufname(buffer['#']))
endfunction

function! fugitive#buffer(...) abort
  return s:buffer(a:0 ? a:1 : '%')
endfunction

function! s:buffer_getvar(var) dict abort
  return getbufvar(self['#'],a:var)
endfunction

function! s:buffer_getline(lnum) dict abort
  return get(getbufline(self['#'], a:lnum), 0, '')
endfunction

function! s:buffer_repo() dict abort
  return s:repo(self.getvar('git_dir'))
endfunction

function! s:buffer_type(...) dict abort
  if !empty(self.getvar('fugitive_type'))
    let type = self.getvar('fugitive_type')
  elseif fnamemodify(self.spec(),':p') =~# '\.git/refs/\|\.git/\w*HEAD$'
    let type = 'head'
  elseif self.getline(1) =~ '^tree \x\{40\}$' && self.getline(2) == ''
    let type = 'tree'
  elseif self.getline(1) =~ '^\d\{6\} \w\{4\} \x\{40\}\>\t'
    let type = 'tree'
  elseif self.getline(1) =~ '^\d\{6\} \x\{40\}\> \d\t'
    let type = 'index'
  elseif isdirectory(self.spec())
    let type = 'directory'
  elseif self.spec() == ''
    let type = 'null'
  else
    let type = 'file'
  endif
  if a:0
    return !empty(filter(copy(a:000),'v:val ==# type'))
  else
    return type
  endif
endfunction

if has('win32')

  function! s:buffer_spec() dict abort
    let bufname = bufname(self['#'])
    let retval = ''
    for i in split(bufname,'[^:]\zs\\')
      let retval = fnamemodify((retval==''?'':retval.'\').i,':.')
    endfor
    return s:shellslash(fnamemodify(retval,':p'))
  endfunction

else

  function! s:buffer_spec() dict abort
    let bufname = bufname(self['#'])
    return s:shellslash(bufname == '' ? '' : fnamemodify(bufname,':p'))
  endfunction

endif

function! s:buffer_name() dict abort
  return self.spec()
endfunction

function! s:buffer_commit() dict abort
  return matchstr(self.spec(),'^fugitive:\%(//\)\=.\{-\}\%(//\|::\)\zs\w*')
endfunction

function! s:cpath(path) abort
  if exists('+fileignorecase') && &fileignorecase
    return s:PlatformSlash(tolower(a:path))
  else
    return s:PlatformSlash(a:path)
  endif
endfunction

function! s:buffer_relative(...) dict abort
  let rev = matchstr(self.spec(),'^fugitive:\%(//\)\=.\{-\}\%(//\|::\)\zs.*')
  if rev != ''
    let rev = s:sub(rev,'\w*','')
  elseif s:cpath(self.spec()[0 : len(self.repo().dir())]) ==#
        \ s:cpath(self.repo().dir() . '/')
    let rev = '/.git'.self.spec()[strlen(self.repo().dir()) : -1]
  elseif !self.repo().bare() &&
        \ s:cpath(self.spec()[0 : len(self.repo().tree())]) ==#
        \ s:cpath(self.repo().tree() . '/')
    let rev = self.spec()[strlen(self.repo().tree()) : -1]
  endif
  return s:sub(s:sub(rev,'.\zs/$',''),'^/',a:0 ? a:1 : '')
endfunction

function! s:Relative(prefix) abort
  return fugitive#Path(@%, a:prefix)
endfunction

function! s:buffer_path(...) dict abort
  if a:0
    return self.relative(a:1)
  endif
  return self.relative()
endfunction

function! s:buffer_rev() dict abort
  let rev = matchstr(self.spec(),'^fugitive:\%(//\)\=.\{-\}\%(//\|::\)\zs.*')
  if rev =~ '^\x/'
    return ':'.rev[0].':'.rev[2:-1]
  elseif rev =~ '.'
    return s:sub(rev,'/',':')
  elseif self.spec() =~ '\.git/index$'
    return ':'
  elseif self.spec() =~ '\.git/refs/\|\.git/.*HEAD$'
    return self.spec()[strlen(self.repo().dir())+1 : -1]
  else
    return self.relative('/')
  endif
endfunction

function! s:buffer_expand(rev) dict abort
  if a:rev =~# '^:[0-3]$'
    let file = a:rev.self.relative(':')
  elseif a:rev =~# '^[-:]/$'
    let file = '/'.self.relative()
  elseif a:rev =~# '^-'
    let file = 'HEAD^{}'.a:rev[1:-1].self.relative(':')
  elseif a:rev =~# '^@{'
    let file = 'HEAD'.a:rev.self.relative(':')
  elseif a:rev =~# '^[~^]'
    let commit = s:sub(self.commit(),'^\d=$','HEAD')
    let file = commit.a:rev.self.relative(':')
  else
    let file = a:rev
  endif
  return s:sub(substitute(file,
        \ '%$\|\\\([[:punct:]]\)','\=len(submatch(1)) ? submatch(1) : self.relative()','g'),
        \ '\.\@<=/$','')
endfunction

call s:add_methods('buffer',['getvar','getline','repo','type','spec','name','commit','path','relative','rev','expand'])

" Section: Git

call s:command("-bang -nargs=? -complete=customlist,s:GitComplete Git :execute s:Git(<bang>0,'<mods>',<q-args>)")

function! s:Git(bang, mods, args) abort
  if a:bang
    return s:Edit('edit', 1, a:mods, a:args)
  endif
  let git = s:git_command()
  if has('gui_running') && !has('win32')
    let git .= ' --no-pager'
  endif
  let args = matchstr(a:args,'\v\C.{-}%($|\\@<!%(\\\\)*\|)@=')
  let after = matchstr(a:args, '\v\C\\@<!%(\\\\)*\zs\|.*')
  let tree = s:repo().tree()
  if has('win32')
    let after = '|call fugitive#ReloadStatus()' . after
  endif
  if exists(':terminal') && has('nvim') && !get(g:, 'fugitive_force_bang_command')
    if len(@%)
      -tabedit %
    else
      -tabnew
    endif
    execute 'lcd' fnameescape(tree)
    return 'exe ' .string('terminal ' . git . ' ' . args) . after
  else
    let cmd = 'exe ' . string('!' . git . ' ' . args)
    if s:cpath(tree) !=# s:cpath(getcwd())
      let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
      let cmd = 'try|' . cd . ' ' . tree . '|' . cmd . '|finally|' . cd . ' ' . s:fnameescape(getcwd()) . '|endtry'
    endif
    return cmd . after
  endif
endfunction

let s:exec_paths = {}
function! s:Subcommands() abort
  if !has_key(s:exec_paths, g:fugitive_git_executable)
    let s:exec_paths[g:fugitive_git_executable] = s:sub(system(g:fugitive_git_executable.' --exec-path'),'\n$','')
  endif
  let exec_path = s:exec_paths[g:fugitive_git_executable]
  return map(split(glob(exec_path.'/git-*'),"\n"),'s:sub(v:val[strlen(exec_path)+5 : -1],"\\.exe$","")')
endfunction

let s:aliases = {}
function! s:Aliases() abort
  if !has_key(s:aliases, b:git_dir)
    let s:aliases[b:git_dir] = {}
    let lines = split(s:TreeChomp('config','-z','--get-regexp','^alias[.]'),"\1")
    for line in v:shell_error ? [] : lines
      let s:aliases[b:git_dir][matchstr(line, '\.\zs.\{-}\ze\n')] = matchstr(line, '\n\zs.*')
    endfor
  endif
  return s:aliases[b:git_dir]
endfunction

function! s:GitComplete(A, L, P) abort
  if strpart(a:L, 0, a:P) !~# ' [[:alnum:]-]\+ '
    let cmds = s:Subcommands()
    return filter(sort(cmds+keys(s:Aliases())), 'strpart(v:val, 0, strlen(a:A)) ==# a:A')
  else
    return s:repo().superglob(a:A)
  endif
endfunction

" Section: Gcd, Glcd

function! s:DirComplete(A, L, P) abort
  let base = s:sub(a:A,'^/','')
  let matches = split(glob(s:repo().tree(s:gsub(base,'/','*&').'*/')),"\n")
  call map(matches,'v:val[ strlen(s:repo().tree())+(a:A !~ "^/") : -1 ]')
  return matches
endfunction

call s:command("-bar -bang -nargs=? -complete=customlist,s:DirComplete Gcd  :exe 'cd<bang>'  s:fnameescape(s:repo().bare() ? s:repo().dir(<q-args>) : s:repo().tree(<q-args>))")
call s:command("-bar -bang -nargs=? -complete=customlist,s:DirComplete Glcd :exe 'lcd<bang>' s:fnameescape(s:repo().bare() ? s:repo().dir(<q-args>) : s:repo().tree(<q-args>))")

" Section: Gstatus

call s:command("-bar -bang -range=-1 Gstatus :execute s:Status(<bang>0, <count>, '<mods>')")
augroup fugitive_status
  autocmd!
  if !has('win32')
    autocmd FocusGained,ShellCmdPost * call fugitive#ReloadStatus()
    autocmd BufDelete term://* call fugitive#ReloadStatus()
  endif
augroup END

function! s:Status(bang, count, mods) abort
  try
    exe (a:mods ==# '<mods>' ? '' : a:mods) 'Gpedit :'
    wincmd P
    setlocal foldmethod=syntax foldlevel=1 buftype=nowrite
    nnoremap <buffer> <silent> q    :<C-U>bdelete<CR>
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  endtry
  return ''
endfunction

function! fugitive#ReloadStatus() abort
  if exists('s:reloading_status')
    return
  endif
  try
    let s:reloading_status = 1
    let mytab = tabpagenr()
    for tab in [mytab] + range(1,tabpagenr('$'))
      for winnr in range(1,tabpagewinnr(tab,'$'))
        if getbufvar(tabpagebuflist(tab)[winnr-1],'fugitive_type') ==# 'index'
          execute 'tabnext '.tab
          if winnr != winnr()
            execute winnr.'wincmd w'
            let restorewinnr = 1
          endif
          try
            if !&modified
              call fugitive#BufReadStatus()
            endif
          finally
            if exists('restorewinnr')
              wincmd p
            endif
            execute 'tabnext '.mytab
          endtry
        endif
      endfor
    endfor
  finally
    unlet! s:reloading_status
  endtry
endfunction

function! fugitive#reload_status() abort
  return fugitive#ReloadStatus()
endfunction

function! s:stage_info(lnum) abort
  let filename = matchstr(getline(a:lnum),'^.\=\t\zs.\{-\}\ze\%( ([^()[:digit:]]\+)\)\=$')
  let lnum = a:lnum
  if has('multi_byte_encoding')
    let colon = '\%(:\|\%uff1a\)'
  else
    let colon = ':'
  endif
  while lnum && getline(lnum) !~# colon.'$'
    let lnum -= 1
  endwhile
  if !lnum
    return ['', '']
  elseif (getline(lnum+1) =~# '^.\= .*\<git \%(reset\|rm --cached\) ' && getline(lnum+2) ==# '#') || getline(lnum) =~# '^\%(. \)\=Changes to be committed:$'
    return [matchstr(filename, colon.' *\zs.*'), 'staged']
  elseif (getline(lnum+1) =~# '^.\= .*\<git add ' && getline(lnum+2) ==# '#' && getline(lnum+3) !~# colon.'  ') || getline(lnum) =~# '^\(. \)\=Untracked files:$'
    return [filename, 'untracked']
  elseif getline(lnum+2) =~# '^.\= .*\<git checkout ' || getline(lnum) =~# '\%(. \)\=Changes not staged for commit:$'
    return [matchstr(filename, colon.' *\zs.*'), 'unstaged']
  elseif getline(lnum+2) =~# '^.\= .*\<git \%(add\|rm\)' || getline(lnum) =~# '\%(. \)\=Unmerged paths:$'
    return [matchstr(filename, colon.' *\zs.*'), 'unmerged']
  else
    return ['', 'unknown']
  endif
endfunction

function! s:StageNext(count) abort
  for i in range(a:count)
    call search('^.\=\t.*','W')
  endfor
  return '.'
endfunction

function! s:StagePrevious(count) abort
  if line('.') == 1 && exists(':CtrlP') && get(g:, 'ctrl_p_map') =~? '^<c-p>$'
    return 'CtrlP '.fnameescape(s:repo().tree())
  else
    for i in range(a:count)
      call search('^.\=\t.*','Wbe')
    endfor
    return '.'
  endif
endfunction

function! s:StageReloadSeek(target,lnum1,lnum2) abort
  let jump = a:target
  let f = matchstr(getline(a:lnum1-1),'^.\=\t\%([[:alpha:] ]\+: *\|.*\%uff1a *\)\=\zs.*')
  if f !=# '' | let jump = f | endif
  let f = matchstr(getline(a:lnum2+1),'^.\=\t\%([[:alpha:] ]\+: *\|.*\%uff1a *\)\=\zs.*')
  if f !=# '' | let jump = f | endif
  silent! edit!
  1
  redraw
  call search('^.\=\t\%([[:alpha:] ]\+: *\|.*\%uff1a *\)\=\V'.jump.'\%( ([^()[:digit:]]\+)\)\=\$','W')
endfunction

function! s:StageUndo() abort
  let [filename, section] = s:stage_info(line('.'))
  if empty(filename)
    return ''
  endif
  let hash = s:TreeChomp('hash-object', '-w', filename)
  if !empty(hash)
    if section ==# 'untracked'
      call s:TreeChomp('clean', '-f', '--', filename)
    elseif section ==# 'unmerged'
      call s:TreeChomp('rm', '--', filename)
    elseif section ==# 'unstaged'
      call s:TreeChomp('checkout', '--', filename)
    else
      call s:TreeChomp('checkout', 'HEAD', '--', filename)
    endif
    call s:StageReloadSeek(filename, line('.'), line('.'))
    let @" = hash
    return 'checktime|redraw|echomsg ' .
          \ string('To restore, :Git cat-file blob '.hash[0:6].' > '.filename)
  endif
endfunction

function! s:StageDiff(diff) abort
  let [filename, section] = s:stage_info(line('.'))
  if filename ==# '' && section ==# 'staged'
    return 'Git! diff --no-ext-diff --cached'
  elseif filename ==# ''
    return 'Git! diff --no-ext-diff'
  elseif filename =~# ' -> '
    let [old, new] = split(filename,' -> ')
    execute 'Gedit '.s:fnameescape(':0:'.new)
    return a:diff.' HEAD:'.s:fnameescape(old)
  elseif section ==# 'staged'
    execute 'Gedit '.s:fnameescape(':0:'.filename)
    return a:diff.' -'
  else
    execute 'Gedit '.s:fnameescape('/'.filename)
    return a:diff
  endif
endfunction

function! s:StageDiffEdit() abort
  let [filename, section] = s:stage_info(line('.'))
  let arg = (filename ==# '' ? '.' : filename)
  if section ==# 'staged'
    return 'Git! diff --no-ext-diff --cached '.s:shellesc(arg)
  elseif section ==# 'untracked'
    call s:TreeChomp('add','--intent-to-add',arg)
    if arg ==# '.'
      silent! edit!
      1
      if !search('^.*:\n.*\n.\= .*"git checkout \|^\%(# \)=Changes not staged for commit:$','W')
        call search(':$','W')
      endif
    else
      call s:StageReloadSeek(arg,line('.'),line('.'))
    endif
    return ''
  else
    return 'Git! diff --no-ext-diff '.s:shellesc(arg)
  endif
endfunction

function! s:StageToggle(lnum1,lnum2) abort
  if a:lnum1 == 1 && a:lnum2 == 1
    return 'Gedit /.git|call search("^index$", "wc")'
  endif
  try
    let output = ''
    for lnum in range(a:lnum1,a:lnum2)
      let [filename, section] = s:stage_info(lnum)
      if getline('.') =~# ':$'
        if section ==# 'staged'
          call s:TreeChomp('reset','-q')
          silent! edit!
          1
          if !search('^.*:\n.\= .*"git add .*\n#\n\|^\%(. \)\=Untracked files:$','W')
            call search(':$','W')
          endif
          return ''
        elseif section ==# 'unstaged'
          call s:TreeChomp('add','-u')
          silent! edit!
          1
          if !search('^.*:\n\.\= .*"git add .*\n#\n\|^\%( \)=Untracked files:$','W')
            call search(':$','W')
          endif
          return ''
        else
          call s:TreeChomp('add','.')
          silent! edit!
          1
          call search(':$','W')
          return ''
        endif
      endif
      if filename ==# ''
        continue
      endif
      execute lnum
      if section ==# 'staged'
        if filename =~ ' -> '
          let files_to_unstage = split(filename,' -> ')
        else
          let files_to_unstage = [filename]
        endif
        let filename = files_to_unstage[-1]
        let cmd = ['reset','-q','--'] + files_to_unstage
      elseif getline(lnum) =~# '^.\=\tdeleted:'
        let cmd = ['rm','--',filename]
      elseif getline(lnum) =~# '^.\=\tmodified:'
        let cmd = ['add','--',filename]
      else
        let cmd = ['add','-A','--',filename]
      endif
      if !exists('first_filename')
        let first_filename = filename
      endif
      let output .= call('s:TreeChomp', cmd)."\n"
    endfor
    if exists('first_filename')
      call s:StageReloadSeek(first_filename,a:lnum1,a:lnum2)
    endif
    echo s:sub(s:gsub(output,'\n+','\n'),'\n$','')
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  endtry
  return 'checktime'
endfunction

function! s:StagePatch(lnum1,lnum2) abort
  let add = []
  let reset = []

  for lnum in range(a:lnum1,a:lnum2)
    let [filename, section] = s:stage_info(lnum)
    if getline('.') =~# ':$' && section ==# 'staged'
      return 'Git reset --patch'
    elseif getline('.') =~# ':$' && section ==# 'unstaged'
      return 'Git add --patch'
    elseif getline('.') =~# ':$' && section ==# 'untracked'
      return 'Git add -N .'
    elseif filename ==# ''
      continue
    endif
    if !exists('first_filename')
      let first_filename = filename
    endif
    execute lnum
    if filename =~ ' -> '
      let reset += [split(filename,' -> ')[1]]
    elseif section ==# 'staged'
      let reset += [filename]
    elseif getline(lnum) !~# '^.\=\tdeleted:'
      let add += [filename]
    endif
  endfor
  try
    if !empty(add)
      execute "Git add --patch -- ".join(map(add,'s:shellesc(v:val)'))
    endif
    if !empty(reset)
      execute "Git reset --patch -- ".join(map(reset,'s:shellesc(v:val)'))
    endif
    if exists('first_filename')
      silent! edit!
      1
      redraw
      call search('^.\=\t\%([[:alpha:] ]\+: *\)\=\V'.first_filename.'\%( ([^()[:digit:]]\+)\)\=\$','W')
    endif
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  endtry
  return 'checktime'
endfunction

" Section: Gcommit

call s:command("-nargs=? -complete=customlist,s:CommitComplete Gcommit :execute s:Commit('<mods>', <q-args>)")

function! s:Commit(mods, args, ...) abort
  let mods = s:gsub(a:mods ==# '<mods>' ? '' : a:mods, '<tab>', '-tab')
  let dir = a:0 ? a:1 : b:git_dir
  let tree = FugitiveTreeForGitDir(dir)
  let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
  let cwd = getcwd()
  let msgfile = dir . '/COMMIT_EDITMSG'
  let outfile = tempname()
  let errorfile = tempname()
  try
    let guioptions = &guioptions
    try
      if &guioptions =~# '!'
        setglobal guioptions-=!
      endif
      execute cd s:fnameescape(tree)
      if s:winshell()
        let command = ''
        let old_editor = $GIT_EDITOR
        let $GIT_EDITOR = 'false'
      else
        let command = 'env GIT_EDITOR=false '
      endif
      let command .= s:git_command() . ' commit ' . a:args
      if &shell =~# 'csh'
        noautocmd silent execute '!('.command.' > '.outfile.') >& '.errorfile
      elseif a:args =~# '\%(^\| \)-\%(-interactive\|p\|-patch\)\>'
        noautocmd execute '!'.command.' 2> '.errorfile
      else
        noautocmd silent execute '!'.command.' > '.outfile.' 2> '.errorfile
      endif
      let error = v:shell_error
    finally
      execute cd s:fnameescape(cwd)
      let &guioptions = guioptions
    endtry
    if !has('gui_running')
      redraw!
    endif
    if !error
      if filereadable(outfile)
        for line in readfile(outfile)
          echo line
        endfor
      endif
      return ''
    else
      let errors = readfile(errorfile)
      let error = get(errors,-2,get(errors,-1,'!'))
      if error =~# 'false''\=\.$'
        let args = a:args
        let args = s:gsub(args,'%(%(^| )-- )@<!%(^| )@<=%(-[esp]|--edit|--interactive|--patch|--signoff)%($| )','')
        let args = s:gsub(args,'%(%(^| )-- )@<!%(^| )@<=%(-c|--reedit-message|--reuse-message|-F|--file|-m|--message)%(\s+|\=)%(''[^'']*''|"%(\\.|[^"])*"|\\.|\S)*','')
        let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
        let cwd = getcwd()
        try
          exe cd s:fnameescape(tree)
          let args = s:gsub(args,'\\@<!(\%|##=|#\<=\d+)(:\w)*','\=fnamemodify(FugitivePath(expand(submatch(1))),":." . submatch(2))')
        finally
          exe cd cwd
        endtry
        let args = s:sub(args, '\ze -- |$', ' --no-edit --no-interactive --no-signoff')
        let args = '-F '.s:shellesc(msgfile).' '.args
        if args !~# '\%(^\| \)--cleanup\>'
          let args = '--cleanup=strip '.args
        endif
        if bufname('%') == '' && line('$') == 1 && getline(1) == '' && !&mod
          execute mods 'keepalt edit' s:fnameescape(msgfile)
        elseif a:args =~# '\%(^\| \)-\w*v' || mods =~# '\<tab\>'
          execute mods 'keepalt -tabedit' s:fnameescape(msgfile)
        elseif get(b:, 'fugitive_type', '') ==# 'index'
          execute mods 'keepalt edit' s:fnameescape(msgfile)
          execute (search('^#','n')+1).'wincmd+'
          setlocal nopreviewwindow
        else
          execute mods 'keepalt split' s:fnameescape(msgfile)
        endif
        let b:fugitive_commit_arguments = args
        setlocal bufhidden=wipe filetype=gitcommit
        return '1'
      elseif error ==# '!'
        return 'Gstatus'
      else
        call s:throw(empty(error)?join(errors, ' '):error)
      endif
    endif
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  finally
    if exists('old_editor')
      let $GIT_EDITOR = old_editor
    endif
    call delete(outfile)
    call delete(errorfile)
    call fugitive#ReloadStatus()
  endtry
endfunction

function! s:CommitComplete(A,L,P) abort
  if a:A =~ '^-' || type(a:A) == type(0) " a:A is 0 on :Gcommit -<Tab>
    let args = ['-C', '-F', '-a', '-c', '-e', '-i', '-m', '-n', '-o', '-q', '-s', '-t', '-u', '-v', '--all', '--allow-empty', '--amend', '--author=', '--cleanup=', '--dry-run', '--edit', '--file=', '--fixup=', '--include', '--interactive', '--message=', '--no-verify', '--only', '--quiet', '--reedit-message=', '--reuse-message=', '--signoff', '--squash=', '--template=', '--untracked-files', '--verbose']
    return filter(args,'v:val[0 : strlen(a:A)-1] ==# a:A')
  else
    return s:repo().superglob(a:A)
  endif
endfunction

function! s:FinishCommit() abort
  let args = getbufvar(+expand('<abuf>'),'fugitive_commit_arguments')
  if !empty(args)
    call setbufvar(+expand('<abuf>'),'fugitive_commit_arguments','')
    return s:Commit('', args, getbufvar(+expand('<abuf>'),'git_dir'))
  endif
  return ''
endfunction

" Section: Gmerge, Gpull

call s:command("-nargs=? -bang -complete=custom,s:RevisionComplete Gmerge " .
      \ "execute s:Merge('merge', <bang>0, <q-args>)")
call s:command("-nargs=? -bang -complete=custom,s:RevisionComplete Grebase " .
      \ "execute s:Merge('rebase', <bang>0, <q-args>)")
call s:command("-nargs=? -bang -complete=custom,s:RemoteComplete Gpull " .
      \ "execute s:Merge('pull --progress', <bang>0, <q-args>)")

function! s:RevisionComplete(A, L, P) abort
  return s:TreeChomp('rev-parse', '--symbolic', '--branches', '--tags', '--remotes')
        \ . "\nHEAD\nFETCH_HEAD\nORIG_HEAD"
endfunction

function! s:RemoteComplete(A, L, P) abort
  let remote = matchstr(a:L, ' \zs\S\+\ze ')
  if !empty(remote)
    let matches = split(s:TreeChomp('ls-remote', remote), "\n")
    call filter(matches, 'v:val =~# "\t" && v:val !~# "{"')
    call map(matches, 's:sub(v:val, "^.*\t%(refs/%(heads/|tags/)=)=", "")')
  else
    let matches = split(s:TreeChomp('remote'), "\n")
  endif
  return join(matches, "\n")
endfunction

function! fugitive#Cwindow() abort
  if &buftype == 'quickfix'
    cwindow
  else
    botright cwindow
    if &buftype == 'quickfix'
      wincmd p
    endif
  endif
endfunction

let s:common_efm = ''
      \ . '%+Egit:%.%#,'
      \ . '%+Eusage:%.%#,'
      \ . '%+Eerror:%.%#,'
      \ . '%+Efatal:%.%#,'
      \ . '%-G%.%#%\e[K%.%#,'
      \ . '%-G%.%#%\r%.%\+'

function! s:Merge(cmd, bang, args) abort
  if a:cmd =~# '^rebase' && ' '.a:args =~# ' -i\| --interactive\| --edit-todo'
    return 'echoerr "git rebase --interactive not supported"'
  endif
  let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
  let cwd = getcwd()
  let [mp, efm] = [&l:mp, &l:efm]
  let had_merge_msg = filereadable(s:repo().dir('MERGE_MSG'))
  try
    let &l:errorformat = ''
          \ . '%-Gerror:%.%#false''.,'
          \ . '%-G%.%# ''git commit'' %.%#,'
          \ . '%+Emerge:%.%#,'
          \ . s:common_efm . ','
          \ . '%+ECannot %.%#: You have unstaged changes.,'
          \ . '%+ECannot %.%#: Your index contains uncommitted changes.,'
          \ . '%+EThere is no tracking information for the current branch.,'
          \ . '%+EYou are not currently on a branch. Please specify which,'
          \ . 'CONFLICT (%m): %f deleted in %.%#,'
          \ . 'CONFLICT (%m): Merge conflict in %f,'
          \ . 'CONFLICT (%m): Rename \"%f\"->%.%#,'
          \ . 'CONFLICT (%m): Rename %.%#->%f %.%#,'
          \ . 'CONFLICT (%m): There is a directory with name %f in %.%#,'
          \ . '%+ECONFLICT %.%#,'
          \ . '%+EKONFLIKT %.%#,'
          \ . '%+ECONFLIT %.%#,'
          \ . "%+EXUNG \u0110\u1ed8T %.%#,"
          \ . "%+E\u51b2\u7a81 %.%#,"
          \ . 'U%\t%f'
    if a:cmd =~# '^merge' && empty(a:args) &&
          \ (had_merge_msg || isdirectory(s:repo().dir('rebase-apply')) ||
          \  !empty(s:TreeChomp('diff-files', '--diff-filter=U')))
      let &l:makeprg = g:fugitive_git_executable.' diff-files --name-status --diff-filter=U'
    else
      let &l:makeprg = s:sub(s:git_command() . ' ' . a:cmd .
            \ (a:args =~# ' \%(--no-edit\|--abort\|-m\)\>' || a:cmd =~# '^rebase' ? '' : ' --edit') .
            \ ' ' . a:args, ' *$', '')
    endif
    if !empty($GIT_EDITOR) || has('win32')
      let old_editor = $GIT_EDITOR
      let $GIT_EDITOR = 'false'
    else
      let &l:makeprg = 'env GIT_EDITOR=false ' . &l:makeprg
    endif
    execute cd fnameescape(s:repo().tree())
    silent noautocmd make!
  catch /^Vim\%((\a\+)\)\=:E211/
    let err = v:exception
  finally
    redraw!
    let [&l:mp, &l:efm] = [mp, efm]
    if exists('old_editor')
      let $GIT_EDITOR = old_editor
    endif
    execute cd fnameescape(cwd)
  endtry
  call fugitive#ReloadStatus()
  if empty(filter(getqflist(),'v:val.valid'))
    if !had_merge_msg && filereadable(s:repo().dir('MERGE_MSG'))
      cclose
      return 'Gcommit --no-status -n -t '.s:shellesc(s:repo().dir('MERGE_MSG'))
    endif
  endif
  let qflist = getqflist()
  let found = 0
  for e in qflist
    if !empty(e.bufnr)
      let found = 1
      let e.pattern = '^<<<<<<<'
    endif
  endfor
  call fugitive#Cwindow()
  if found
    call setqflist(qflist, 'r')
    if !a:bang
      return 'cfirst'
    endif
  endif
  return exists('err') ? 'echoerr '.string(err) : ''
endfunction

" Section: Ggrep, Glog

if !exists('g:fugitive_summary_format')
  let g:fugitive_summary_format = '%s'
endif

call s:command("-bang -nargs=? -complete=customlist,s:EditComplete Ggrep :execute s:Grep('grep',<bang>0,<q-args>)")
call s:command("-bang -nargs=? -complete=customlist,s:EditComplete Glgrep :execute s:Grep('lgrep',<bang>0,<q-args>)")
call s:command("-bar -bang -nargs=* -range=0 -complete=customlist,s:EditComplete Glog :call s:Log('grep',<bang>0,<line1>,<count>,<f-args>)")
call s:command("-bar -bang -nargs=* -range=0 -complete=customlist,s:EditComplete Gllog :call s:Log('lgrep',<bang>0,<line1>,<count>,<f-args>)")

function! s:Grep(cmd,bang,arg) abort
  let grepprg = &grepprg
  let grepformat = &grepformat
  let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
  let dir = getcwd()
  try
    execute cd s:fnameescape(s:repo().tree())
    let &grepprg = s:git_command() . ' --no-pager grep -n --no-color'
    let &grepformat = '%f:%l:%m,%m %f match%ts,%f'
    exe a:cmd.'! '.escape(matchstr(a:arg,'\v\C.{-}%($|[''" ]\@=\|)@='),'|')
    let list = a:cmd =~# '^l' ? getloclist(0) : getqflist()
    for entry in list
      if bufname(entry.bufnr) =~ ':'
        let entry.filename = s:Generate(bufname(entry.bufnr))
        unlet! entry.bufnr
        let changed = 1
      elseif a:arg =~# '\%(^\| \)--cached\>'
        let entry.filename = s:Generate(':0:'.bufname(entry.bufnr))
        unlet! entry.bufnr
        let changed = 1
      endif
    endfor
    if a:cmd =~# '^l' && exists('changed')
      call setloclist(0, list, 'r')
    elseif exists('changed')
      call setqflist(list, 'r')
    endif
    if !a:bang && !empty(list)
      return (a:cmd =~# '^l' ? 'l' : 'c').'first'.matchstr(a:arg,'\v\C[''" ]\zs\|.*')
    else
      return matchstr(a:arg,'\v\C[''" ]\|\zs.*')
    endif
  finally
    let &grepprg = grepprg
    let &grepformat = grepformat
    execute cd s:fnameescape(dir)
  endtry
endfunction

function! s:Log(cmd, bang, line1, line2, ...) abort
  let path = s:Relative('/')
  if path =~# '^/\.git\%(/\|$\)' || index(a:000,'--') != -1
    let path = ''
  endif
  let cmd = ['--no-pager', 'log', '--no-color']
  let cmd += ['--pretty=format:fugitive://'.s:repo().dir().'//%H'.path.'::'.g:fugitive_summary_format]
  if empty(filter(a:000[0 : index(a:000,'--')],'v:val !~# "^-"'))
    let commit = s:DirCommitFile(@%)[1]
    if len(commit) > 2
      let cmd += [commit]
    elseif s:Relative('') =~# '^\.git/refs/\|^\.git/.*HEAD$'
      let cmd += [s:Relative('')[5:-1]]
    endif
  end
  let cmd += map(copy(a:000),'s:sub(v:val,"^\\%(%(:\\w)*)","\\=fnamemodify(s:Relative(''),submatch(1))")')
  if path =~# '/.'
    if a:line2
      let cmd += ['-L', a:line1 . ',' . a:line2 . ':' . path[1:-1]]
    else
      let cmd += ['--', path[1:-1]]
    endif
  endif
  let grepformat = &grepformat
  let grepprg = &grepprg
  let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
  let dir = getcwd()
  try
    execute cd s:fnameescape(s:repo().tree())
    let &grepprg = escape(s:git_command() . join(map(cmd, '" ".s:shellesc(v:val)'), ''), '%#')
    let &grepformat = '%Cdiff %.%#,%C--- %.%#,%C+++ %.%#,%Z@@ -%\d%\+\,%\d%\+ +%l\,%\d%\+ @@,%-G-%.%#,%-G+%.%#,%-G %.%#,%A%f::%m,%-G%.%#'
    exe a:cmd . (a:bang ? '!' : '')
  finally
    let &grepformat = grepformat
    let &grepprg = grepprg
    execute cd s:fnameescape(dir)
  endtry
endfunction

" Section: Gedit, Gpedit, Gsplit, Gvsplit, Gtabedit, Gread

function! s:UsableWin(nr) abort
  return a:nr && !getwinvar(a:nr, '&previewwindow') &&
        \ index(['nofile','help','quickfix'], getbufvar(winbufnr(a:nr), '&buftype')) < 0
endfunction

function! s:Edit(cmd, bang, mods, ...) abort
  let mods = a:mods ==# '<mods>' ? '' : a:mods
  let buffer = s:buffer()
  if a:cmd !~# 'read'
    if &previewwindow && getbufvar('','fugitive_type') ==# 'index'
      let winnrs = filter([winnr('#')] + range(1, winnr('$')), 's:UsableWin(v:val)')
      if len(winnrs)
        exe winnrs[0].'wincmd w'
      elseif winnr('$') == 1
        let tabs = (&go =~# 'e' || !has('gui_running')) && &stal && (tabpagenr('$') >= &stal)
        execute 'rightbelow' (&lines - &previewheight - &cmdheight - tabs - 1 - !!&laststatus).'new'
      else
        rightbelow new
      endif
      if &diff
        let mywinnr = winnr()
        for winnr in range(winnr('$'),1,-1)
          if winnr != mywinnr && getwinvar(winnr,'&diff')
            execute winnr.'wincmd w'
            close
            if winnr('$') > 1
              wincmd p
            endif
          endif
        endfor
        diffoff!
      endif
    endif
  endif

  if a:bang
    let arglist = map(copy(a:000), 's:gsub(v:val, ''\\@<!%(\\\\)*\zs[%#]'', ''\=s:buffer().expand(submatch(0))'')')
    let args = join(arglist, ' ')
    if a:cmd =~# 'read'
      let git = s:git_command()
      let last = line('$')
      let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
      let cwd = getcwd()
      try
        execute cd s:fnameescape(s:repo().tree())
        silent execute mods.' '.(a:cmd ==# 'read' ? 'keepalt $read' : a:cmd).'!'.git.' --no-pager '.args
      finally
        execute cd s:fnameescape(cwd)
      endtry
      if a:cmd ==# 'read'
        silent execute '1,'.last.'delete_'
      endif
      call fugitive#ReloadStatus()
      diffupdate
      return 'redraw|echo '.string(':!'.git.' '.args)
    else
      let temp = s:tempname()
      let s:temp_files[s:cpath(temp)] = { 'dir': buffer.repo().dir(), 'args': arglist }
      silent execute mods a:cmd temp
      if a:cmd =~# 'pedit'
        wincmd P
      endif
      let echo = s:Edit('read', 1, mods, args)
      silent write!
      setlocal buftype=nowrite nomodified filetype=git foldmarker=<<<<<<<,>>>>>>>
      if getline(1) !~# '^diff '
        setlocal readonly nomodifiable
      endif
      if a:cmd =~# 'pedit'
        wincmd p
      endif
      return echo
    endif
    return ''
  endif

  if a:0 && a:1 == ''
    return ''
  elseif a:0
    let file = buffer.expand(join(a:000, ' '))
  elseif expand('%') ==# ''
    let file = ':'
  elseif empty(s:DirCommitFile(@%)[1]) && s:Relative('/') !~# '^/.git\>'
    let file = s:Relative(':')
  else
    let file = s:Relative('/')
  endif
  try
    let file = s:Generate(file)
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  endtry
  if file !~# '^fugitive:'
    let file = s:sub(file, '/$', '')
  endif
  if a:cmd ==# 'read'
    return 'silent %delete_|'.mods.' read '.s:fnameescape(file).'|silent 1delete_|diffupdate|'.line('.')
  else
    return mods.' '.a:cmd.' '.s:fnameescape(file)
  endif
endfunction

function! s:EditComplete(A,L,P) abort
  return map(s:repo().superglob(a:A), 'fnameescape(v:val)')
endfunction

function! s:EditRunComplete(A,L,P) abort
  if a:L =~# '^\w\+!'
    return s:GitComplete(a:A,a:L,a:P)
  else
    return s:repo().superglob(a:A)
  endif
endfunction

call s:command("-bar -bang -nargs=* -complete=customlist,s:EditComplete Ge       :execute s:Edit('edit<bang>',0,'<mods>',<f-args>)")
call s:command("-bar -bang -nargs=* -complete=customlist,s:EditComplete Gedit    :execute s:Edit('edit<bang>',0,'<mods>',<f-args>)")
call s:command("-bar -bang -nargs=* -complete=customlist,s:EditRunComplete Gpedit   :execute s:Edit('pedit',<bang>0,'<mods>',<f-args>)")
call s:command("-bar -bang -nargs=* -complete=customlist,s:EditRunComplete Gsplit   :execute s:Edit('split',<bang>0,'<mods>',<f-args>)")
call s:command("-bar -bang -nargs=* -complete=customlist,s:EditRunComplete Gvsplit  :execute s:Edit('vsplit',<bang>0,'<mods>',<f-args>)")
call s:command("-bar -bang -nargs=* -complete=customlist,s:EditRunComplete Gtabedit :execute s:Edit('tabedit',<bang>0,'<mods>',<f-args>)")
call s:command("-bar -bang -nargs=* -range=-1 -complete=customlist,s:EditRunComplete Gread :execute s:Edit((<count> == -1 ? '' : <count>).'read',<bang>0,'<mods>',<f-args>)")

" Section: Gwrite, Gwq

call s:command("-bar -bang -nargs=* -complete=customlist,s:EditComplete Gwrite :execute s:Write(<bang>0,<f-args>)")
call s:command("-bar -bang -nargs=* -complete=customlist,s:EditComplete Gw :execute s:Write(<bang>0,<f-args>)")
call s:command("-bar -bang -nargs=* -complete=customlist,s:EditComplete Gwq :execute s:Wq(<bang>0,<f-args>)")

function! s:Write(force,...) abort
  if exists('b:fugitive_commit_arguments')
    return 'write|bdelete'
  elseif expand('%:t') == 'COMMIT_EDITMSG' && $GIT_INDEX_FILE != ''
    return 'wq'
  elseif get(b:, 'fugitive_type', '') ==# 'index'
    return 'Gcommit'
  elseif s:Relative('') ==# '' && getline(4) =~# '^+++ '
    let filename = getline(4)[6:-1]
    setlocal buftype=
    silent write
    setlocal buftype=nowrite
    if matchstr(getline(2),'index [[:xdigit:]]\+\.\.\zs[[:xdigit:]]\{7\}') ==# s:repo().rev_parse(':0:'.filename)[0:6]
      let err = s:TreeChomp('apply', '--cached', '--reverse', expand('%:p'))
    else
      let err = s:TreeChomp('apply', '--cached', expand('%:p'))
    endif
    if err !=# ''
      let v:errmsg = split(err,"\n")[0]
      return 'echoerr v:errmsg'
    elseif a:force
      return 'bdelete'
    else
      return 'Gedit '.fnameescape(filename)
    endif
  endif
  let mytab = tabpagenr()
  let mybufnr = bufnr('')
  let path = a:0 ? join(a:000, ' ') : s:Relative('')
  if empty(path)
    return 'echoerr '.string('fugitive: cannot determine file path')
  endif
  if path =~# '^:\d\>'
    return 'write'.(a:force ? '! ' : ' ').s:fnameescape(s:Generate(s:buffer().expand(path)))
  endif
  let always_permitted = (s:Relative('') ==# path && s:DirCommitFile(@%)[1] =~# '^0\=$')
  if !always_permitted && !a:force && (len(s:TreeChomp('diff','--name-status','HEAD','--',path)) || len(s:TreeChomp('ls-files','--others','--',path)))
    let v:errmsg = 'fugitive: file has uncommitted changes (use ! to override)'
    return 'echoerr v:errmsg'
  endif
  let file = s:Generate(path)
  let treebufnr = 0
  for nr in range(1,bufnr('$'))
    if fnamemodify(bufname(nr),':p') ==# file
      let treebufnr = nr
    endif
  endfor

  if treebufnr > 0 && treebufnr != bufnr('')
    let temp = tempname()
    silent execute '%write '.temp
    for tab in [mytab] + range(1,tabpagenr('$'))
      for winnr in range(1,tabpagewinnr(tab,'$'))
        if tabpagebuflist(tab)[winnr-1] == treebufnr
          execute 'tabnext '.tab
          if winnr != winnr()
            execute winnr.'wincmd w'
            let restorewinnr = 1
          endif
          try
            let lnum = line('.')
            let last = line('$')
            silent execute '$read '.temp
            silent execute '1,'.last.'delete_'
            silent write!
            silent execute lnum
            let did = 1
          finally
            if exists('restorewinnr')
              wincmd p
            endif
            execute 'tabnext '.mytab
          endtry
        endif
      endfor
    endfor
    if !exists('did')
      call writefile(readfile(temp,'b'),file,'b')
    endif
  else
    execute 'write! '.s:fnameescape(s:Generate(path))
  endif

  if a:force
    let error = s:TreeChomp('add', '--force', '--', path)
  else
    let error = s:TreeChomp('add', '--', path)
  endif
  if v:shell_error
    let v:errmsg = 'fugitive: '.error
    return 'echoerr v:errmsg'
  endif
  if s:Relative('') ==# path && s:DirCommitFile(@%)[1] =~# '^\d$'
    set nomodified
  endif

  let one = s:Generate(':1:'.path)
  let two = s:Generate(':2:'.path)
  let three = s:Generate(':3:'.path)
  for nr in range(1,bufnr('$'))
    let name = fnamemodify(bufname(nr), ':p')
    if bufloaded(nr) && !getbufvar(nr,'&modified') && (name ==# one || name ==# two || name ==# three)
      execute nr.'bdelete'
    endif
  endfor

  unlet! restorewinnr
  let zero = s:Generate(':0:'.path)
  silent execute 'doautocmd BufWritePost' s:fnameescape(zero)
  for tab in range(1,tabpagenr('$'))
    for winnr in range(1,tabpagewinnr(tab,'$'))
      let bufnr = tabpagebuflist(tab)[winnr-1]
      let bufname = fnamemodify(bufname(bufnr), ':p')
      if bufname ==# zero && bufnr != mybufnr
        execute 'tabnext '.tab
        if winnr != winnr()
          execute winnr.'wincmd w'
          let restorewinnr = 1
        endif
        try
          let lnum = line('.')
          let last = line('$')
          silent execute '$read '.s:fnameescape(file)
          silent execute '1,'.last.'delete_'
          silent execute lnum
          set nomodified
          diffupdate
        finally
          if exists('restorewinnr')
            wincmd p
          endif
          execute 'tabnext '.mytab
        endtry
        break
      endif
    endfor
  endfor
  call fugitive#ReloadStatus()
  return 'checktime'
endfunction

function! s:Wq(force,...) abort
  let bang = a:force ? '!' : ''
  if exists('b:fugitive_commit_arguments')
    return 'wq'.bang
  endif
  let result = call(s:function('s:Write'),[a:force]+a:000)
  if result =~# '^\%(write\|wq\|echoerr\)'
    return s:sub(result,'^write','wq')
  else
    return result.'|quit'.bang
  endif
endfunction

augroup fugitive_commit
  autocmd!
  autocmd VimLeavePre,BufDelete COMMIT_EDITMSG execute s:sub(s:FinishCommit(), '^echoerr (.*)', 'echohl ErrorMsg|echo \1|echohl NONE')
augroup END

" Section: Gpush, Gfetch

call s:command("-nargs=? -bang -complete=custom,s:RemoteComplete Gpush  execute s:Dispatch('<bang>', 'push '.<q-args>)")
call s:command("-nargs=? -bang -complete=custom,s:RemoteComplete Gfetch execute s:Dispatch('<bang>', 'fetch '.<q-args>)")

function! s:Dispatch(bang, args)
  let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
  let cwd = getcwd()
  let [mp, efm, cc] = [&l:mp, &l:efm, get(b:, 'current_compiler', '')]
  try
    let b:current_compiler = 'git'
    let &l:errorformat = s:common_efm
    let &l:makeprg = substitute(s:git_command() . ' ' . a:args, '\s\+$', '', '')
    execute cd fnameescape(s:repo().tree())
    if exists(':Make') == 2
      noautocmd Make
    else
      silent noautocmd make!
      redraw!
      return 'call fugitive#Cwindow()'
    endif
    return ''
  finally
    let [&l:mp, &l:efm, b:current_compiler] = [mp, efm, cc]
    if empty(cc) | unlet! b:current_compiler | endif
    execute cd fnameescape(cwd)
  endtry
endfunction

" Section: Gdiff

call s:command("-bang -bar -nargs=* -complete=customlist,s:EditComplete Gdiff :execute s:Diff('',<bang>0,<f-args>)")
call s:command("-bang -bar -nargs=* -complete=customlist,s:EditComplete Gvdiff :execute s:Diff('keepalt vert ',<bang>0,<f-args>)")
call s:command("-bang -bar -nargs=* -complete=customlist,s:EditComplete Gsdiff :execute s:Diff('keepalt ',<bang>0,<f-args>)")

augroup fugitive_diff
  autocmd!
  autocmd BufWinLeave *
        \ if s:can_diffoff(+expand('<abuf>')) && s:diff_window_count() == 2 |
        \   call s:diffoff_all(getbufvar(+expand('<abuf>'), 'git_dir')) |
        \ endif
  autocmd BufWinEnter *
        \ if s:can_diffoff(+expand('<abuf>')) && s:diff_window_count() == 1 |
        \   call s:diffoff() |
        \ endif
augroup END

function! s:can_diffoff(buf) abort
  return getwinvar(bufwinnr(a:buf), '&diff') &&
        \ !empty(getbufvar(a:buf, 'git_dir')) &&
        \ !empty(getwinvar(bufwinnr(a:buf), 'fugitive_diff_restore'))
endfunction

function! fugitive#CanDiffoff(buf) abort
  return s:can_diffoff(a:buf)
endfunction

function! s:diff_modifier(count) abort
  let fdc = matchstr(&diffopt, 'foldcolumn:\zs\d\+')
  if &diffopt =~# 'horizontal' && &diffopt !~# 'vertical'
    return 'keepalt '
  elseif &diffopt =~# 'vertical'
    return 'keepalt vert '
  elseif winwidth(0) <= a:count * ((&tw ? &tw : 80) + (empty(fdc) ? 2 : fdc))
    return 'keepalt '
  else
    return 'keepalt vert '
  endif
endfunction

function! s:diff_window_count() abort
  let c = 0
  for nr in range(1,winnr('$'))
    let c += getwinvar(nr,'&diff')
  endfor
  return c
endfunction

function! s:diff_restore() abort
  let restore = 'setlocal nodiff noscrollbind'
        \ . ' scrollopt=' . &l:scrollopt
        \ . (&l:wrap ? ' wrap' : ' nowrap')
        \ . ' foldlevel=999'
        \ . ' foldmethod=' . &l:foldmethod
        \ . ' foldcolumn=' . &l:foldcolumn
        \ . ' foldlevel=' . &l:foldlevel
        \ . (&l:foldenable ? ' foldenable' : ' nofoldenable')
  if has('cursorbind')
    let restore .= (&l:cursorbind ? ' ' : ' no') . 'cursorbind'
  endif
  return restore
endfunction

function! s:diffthis() abort
  if !&diff
    let w:fugitive_diff_restore = s:diff_restore()
    diffthis
  endif
endfunction

function! s:diffoff() abort
  if exists('w:fugitive_diff_restore')
    execute w:fugitive_diff_restore
    unlet w:fugitive_diff_restore
  else
    diffoff
  endif
endfunction

function! s:diffoff_all(dir) abort
  let curwin = winnr()
  for nr in range(1,winnr('$'))
    if getwinvar(nr,'&diff')
      if nr != winnr()
        execute nr.'wincmd w'
        let restorewinnr = 1
      endif
      if exists('b:git_dir') && b:git_dir ==# a:dir
        call s:diffoff()
      endif
    endif
  endfor
  execute curwin.'wincmd w'
endfunction

function! s:CompareAge(mine, theirs) abort
  let scores = {':0': 1, ':1': 2, ':2': 3, ':': 4, ':3': 5}
  let mine = substitute(a:mine, '^:', '', '')
  let theirs = substitute(a:theirs, '^:', '', '')
  let my_score    = get(scores, ':'.mine, 0)
  let their_score = get(scores, ':'.theirs, 0)
  if my_score || their_score
    return my_score < their_score ? -1 : my_score != their_score
  elseif mine ==# theirs
    return 0
  endif
  let base = s:TreeChomp('merge-base', mine, theirs)
  if base ==# mine
    return -1
  elseif base ==# theirs
    return 1
  endif
  let my_time    = +s:TreeChomp('log','--max-count=1','--pretty=format:%at',a:mine)
  let their_time = +s:TreeChomp('log','--max-count=1','--pretty=format:%at',a:theirs)
  return my_time < their_time ? -1 : my_time != their_time
endfunction

function! s:Diff(vert,keepfocus,...) abort
  let args = copy(a:000)
  let post = ''
  if get(args, 0) =~# '^+'
    let post = remove(args, 0)[1:-1]
  endif
  let vert = empty(a:vert) ? s:diff_modifier(2) : a:vert
  let commit = s:DirCommitFile(@%)[1]
  let back = exists('*win_getid') ? 'call win_gotoid(' . win_getid() . ')' : 'wincmd p'
  if exists(':DiffGitCached')
    return 'DiffGitCached'
  elseif (empty(args) || args[0] ==# ':') && commit =~# '^[0-1]\=$' && !empty(s:TreeChomp('ls-files', '--unmerged', '--', s:Relative('')))
    let vert = empty(a:vert) ? s:diff_modifier(3) : a:vert
    let nr = bufnr('')
    execute 'leftabove '.vert.'split' s:fnameescape(s:Generate(s:Relative(':2:')))
    execute 'nnoremap <buffer> <silent> dp :diffput '.nr.'<Bar>diffupdate<CR>'
    let nr2 = bufnr('')
    call s:diffthis()
    exe back
    execute 'rightbelow '.vert.'split' s:fnameescape(s:Generate(s:Relative(':3:')))
    execute 'nnoremap <buffer> <silent> dp :diffput '.nr.'<Bar>diffupdate<CR>'
    let nr3 = bufnr('')
    call s:diffthis()
    exe back
    call s:diffthis()
    execute 'nnoremap <buffer> <silent> d2o :diffget '.nr2.'<Bar>diffupdate<CR>'
    execute 'nnoremap <buffer> <silent> d3o :diffget '.nr3.'<Bar>diffupdate<CR>'
    return post
  elseif len(args)
    let arg = join(args, ' ')
    if arg ==# ''
      return post
    elseif arg ==# '/'
      let file = s:Relative('/')
    elseif arg ==# ':'
      let file = s:Relative(':0:')
    elseif arg =~# '^:/.'
      try
        let file = s:repo().rev_parse(arg).s:Relative(':')
      catch /^fugitive:/
        return 'echoerr v:errmsg'
      endtry
    else
      let file = s:buffer().expand(arg)
    endif
    if file !~# ':' && file !~# '^/' && s:TreeChomp('cat-file','-t',file) =~# '^\%(tag\|commit\)$'
      let file = file.s:Relative(':')
    endif
  else
    let file = s:Relative(empty(commit) ? ':0:' : '/')
  endif
  try
    let spec = s:Generate(file)
    let restore = s:diff_restore()
    if exists('+cursorbind')
      setlocal cursorbind
    endif
    let w:fugitive_diff_restore = restore
    if s:CompareAge(commit, s:DirCommitFile(spec)[1]) < 0
      execute 'rightbelow '.vert.'diffsplit '.s:fnameescape(spec)
    else
      execute 'leftabove '.vert.'diffsplit '.s:fnameescape(spec)
    endif
    let &l:readonly = &l:readonly
    redraw
    let w:fugitive_diff_restore = restore
    let winnr = winnr()
    if getwinvar('#', '&diff')
      exe back
      if !a:keepfocus
        call feedkeys(winnr."\<C-W>w", 'n')
      endif
    endif
    return post
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  endtry
endfunction

" Section: Gmove, Gremove

function! s:Move(force, rename, destination) abort
  if a:destination =~# '^/'
    let destination = a:destination[1:-1]
  elseif a:rename
    let destination = fnamemodify(s:Relative(''), ':h') . '/' . a:destination
  else
    let destination = a:destination
  endif
  if isdirectory(@%)
    setlocal noswapfile
  endif
  let message = call('s:TreeChomp', ['mv'] + (a:force ? ['-f'] : []) + ['--', s:Relative(''), destination])
  if v:shell_error
    let v:errmsg = 'fugitive: '.message
    return 'echoerr v:errmsg'
  endif
  let destination = s:repo().tree(destination)
  if isdirectory(destination)
    let destination = fnamemodify(s:sub(destination,'/$','').'/'.expand('%:t'),':.')
  endif
  call fugitive#ReloadStatus()
  if empty(s:DirCommitFile(@%)[1])
    if isdirectory(destination)
      return 'keepalt edit '.s:fnameescape(destination)
    else
      return 'keepalt saveas! '.s:fnameescape(destination)
    endif
  else
    return 'file '.s:fnameescape(s:Generate(':0:'.destination))
  endif
endfunction

function! s:MoveComplete(A,L,P) abort
  if a:A =~# '^/'
    return s:repo().superglob(a:A)
  else
    return map(s:repo().superglob('/' . a:A), 'strpart(v:val, 1)')
  endif
endfunction

function! s:RenameComplete(A,L,P) abort
  if a:A =~# '^/'
    return s:repo().superglob(a:A)
  else
    let pre = '/' . fnamemodify(s:Relative(''), ':h') . '/'
    return map(s:repo().superglob(pre.a:A), 'strpart(v:val, len(pre))')
  endif
endfunction

function! s:Remove(after, force) abort
  if s:DirCommitFile(@%)[1] ==# ''
    let cmd = ['rm']
  elseif s:DirCommitFile(@%)[1] ==# '0'
    let cmd = ['rm','--cached']
  else
    let v:errmsg = 'fugitive: rm not supported here'
    return 'echoerr v:errmsg'
  endif
  if a:force
    let cmd += ['--force']
  endif
  let message = call('s:TreeChomp', cmd+['--',s:Relative('')])
  if v:shell_error
    let v:errmsg = 'fugitive: '.s:sub(message,'error:.*\zs\n\(.*-f.*',' (add ! to force)')
    return 'echoerr '.string(v:errmsg)
  else
    call fugitive#ReloadStatus()
    return a:after . (a:force ? '!' : '')
  endif
endfunction

augroup fugitive_remove
  autocmd!
  autocmd User Fugitive if s:DirCommitFile(@%)[1] =~# '^0\=$' |
        \ exe "command! -buffer -bar -bang -nargs=1 -complete=customlist,s:MoveComplete Gmove :execute s:Move(<bang>0,0,<q-args>)" |
        \ exe "command! -buffer -bar -bang -nargs=1 -complete=customlist,s:RenameComplete Grename :execute s:Move(<bang>0,1,<q-args>)" |
        \ exe "command! -buffer -bar -bang Gremove :execute s:Remove('edit',<bang>0)" |
        \ exe "command! -buffer -bar -bang Gdelete :execute s:Remove('bdelete',<bang>0)" |
        \ endif
augroup END

" Section: Gblame

function! s:Keywordprg() abort
  let args = ' --git-dir='.escape(b:git_dir,"\\\"' ")
  if has('gui_running') && !has('win32')
    return s:git_command() . ' --no-pager' . args . ' log -1'
  else
    return s:git_command() . args . ' show'
  endif
endfunction

augroup fugitive_blame
  autocmd!
  autocmd FileType fugitiveblame setlocal nomodeline | if exists('b:git_dir') | let &l:keywordprg = s:Keywordprg() | endif
  autocmd Syntax fugitiveblame call s:BlameSyntax()
  autocmd User Fugitive
        \ if get(b:, 'fugitive_type') =~# '^\%(file\|blob\|blame\)$' || filereadable(@%) |
        \   exe "command! -buffer -bar -bang -range=0 -nargs=* Gblame :execute s:Blame(<bang>0,<line1>,<line2>,<count>,'<mods>',[<f-args>])" |
        \ endif
  autocmd ColorScheme,GUIEnter * call s:RehighlightBlame()
  autocmd BufWinLeave * execute getwinvar(+bufwinnr(+expand('<abuf>')), 'fugitive_leave')
augroup END

function! s:linechars(pattern) abort
  let chars = strlen(s:gsub(matchstr(getline('.'), a:pattern), '.', '.'))
  if exists('*synconcealed') && &conceallevel > 1
    for col in range(1, chars)
      let chars -= synconcealed(line('.'), col)[0]
    endfor
  endif
  return chars
endfunction

function! s:Blame(bang, line1, line2, count, mods, args) abort
  if exists('b:fugitive_blamed_bufnr')
    return 'bdelete'
  endif
  try
    if empty(s:Relative(''))
      call s:throw('file or blob required')
    endif
    if filter(copy(a:args),'v:val !~# "^\\%(--root\|--show-name\\|-\\=\\%([ltfnsew]\\|[MC]\\d*\\)\\+\\)$"') != []
      call s:throw('unsupported option')
    endif
    call map(a:args,'s:sub(v:val,"^\\ze[^-]","-")')
    let cmd = ['--no-pager', 'blame', '--show-number']
    if a:count
      let cmd += ['-L', a:line1 . ',' . a:line1]
    endif
    let cmd += a:args
    if s:DirCommitFile(@%)[1] =~# '\D\|..'
      let cmd += [s:DirCommitFile(@%)[1]]
    else
      let cmd += ['--contents', '-']
    endif
    let cmd += ['--', s:Relative('')]
    let basecmd = escape(call('fugitive#Prepare', cmd), '!#%')
    try
      let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
      let tree = FugitiveTreeForGitDir(b:git_dir)
      if len(tree) && s:cpath(tree) !=# s:cpath(getcwd())
        let cwd = getcwd()
        execute cd s:fnameescape(tree)
      endif
      let error = s:tempname()
      let temp = error.'.fugitiveblame'
      if &shell =~# 'csh'
        silent! execute '%write !('.basecmd.' > '.temp.') >& '.error
      else
        silent! execute '%write !'.basecmd.' > '.temp.' 2> '.error
      endif
      if exists('l:cwd')
        execute cd s:fnameescape(cwd)
        unlet cwd
      endif
      if v:shell_error
        call s:throw(join(readfile(error),"\n"))
      endif
      if a:count
        let edit = substitute(a:mods, '^<mods>$', '', '') . get(['edit', 'split', 'pedit'], a:line2 - a:line1, ' split')
        return s:BlameCommit(edit, get(readfile(temp), 0, ''))
      else
        for winnr in range(winnr('$'),1,-1)
          call setwinvar(winnr, '&scrollbind', 0)
          if exists('+cursorbind')
            call setwinvar(winnr, '&cursorbind', 0)
          endif
          if getbufvar(winbufnr(winnr), 'fugitive_blamed_bufnr')
            execute winbufnr(winnr).'bdelete'
          endif
        endfor
        let bufnr = bufnr('')
        let restore = 'call setwinvar(bufwinnr('.bufnr.'),"&scrollbind",0)'
        if exists('+cursorbind')
          let restore .= '|call setwinvar(bufwinnr('.bufnr.'),"&cursorbind",0)'
        endif
        if &l:wrap
          let restore .= '|call setwinvar(bufwinnr('.bufnr.'),"&wrap",1)'
        endif
        if &l:foldenable
          let restore .= '|call setwinvar(bufwinnr('.bufnr.'),"&foldenable",1)'
        endif
        setlocal scrollbind nowrap nofoldenable
        if exists('+cursorbind')
          setlocal cursorbind
        endif
        let top = line('w0') + &scrolloff
        let current = line('.')
        let s:temp_files[s:cpath(temp)] = { 'dir': s:repo().dir(), 'args': cmd }
        exe 'keepalt leftabove vsplit '.temp
        let b:fugitive_blamed_bufnr = bufnr
        let b:fugitive_type = 'blame'
        let w:fugitive_leave = restore
        let b:fugitive_blame_arguments = join(a:args,' ')
        execute top
        normal! zt
        execute current
        if exists('+cursorbind')
          setlocal cursorbind
        endif
        setlocal nomodified nomodifiable nonumber scrollbind nowrap foldcolumn=0 nofoldenable winfixwidth filetype=fugitiveblame buftype=nowrite
        if exists('+concealcursor')
          setlocal concealcursor=nc conceallevel=2
        endif
        if exists('+relativenumber')
          setlocal norelativenumber
        endif
        execute "vertical resize ".(s:linechars('.\{-\}\ze\s\+\d\+)')+1)
        nnoremap <buffer> <silent> <F1> :help fugitive-:Gblame<CR>
        nnoremap <buffer> <silent> g?   :help fugitive-:Gblame<CR>
        nnoremap <buffer> <silent> q    :exe substitute(bufwinnr(b:fugitive_blamed_bufnr).' wincmd w<Bar>'.bufnr('').'bdelete','^-1','','')<CR>
        nnoremap <buffer> <silent> gq   :exe substitute(bufwinnr(b:fugitive_blamed_bufnr).' wincmd w<Bar>'.bufnr('').'bdelete<Bar>if expand("%:p") =~# "^fugitive:[\\/][\\/]"<Bar>Gedit<Bar>endif','^-1','','')<CR>
        nnoremap <buffer> <silent> <CR> :<C-U>exe <SID>BlameCommit("exe 'norm q'<Bar>edit")<CR>
        nnoremap <buffer> <silent> -    :<C-U>exe <SID>BlameJump('')<CR>
        nnoremap <buffer> <silent> P    :<C-U>exe <SID>BlameJump('^'.v:count1)<CR>
        nnoremap <buffer> <silent> ~    :<C-U>exe <SID>BlameJump('~'.v:count1)<CR>
        nnoremap <buffer> <silent> i    :<C-U>exe <SID>BlameCommit("exe 'norm q'<Bar>edit")<CR>
        nnoremap <buffer> <silent> o    :<C-U>exe <SID>BlameCommit((&splitbelow ? "botright" : "topleft")." split")<CR>
        nnoremap <buffer> <silent> O    :<C-U>exe <SID>BlameCommit("tabedit")<CR>
        nnoremap <buffer> <silent> p    :<C-U>exe <SID>Edit((&splitbelow ? "botright" : "topleft").' pedit', 0, '', matchstr(getline('.'), '\x\+'))<CR>
        nnoremap <buffer> <silent> A    :<C-u>exe "vertical resize ".(<SID>linechars('.\{-\}\ze [0-9:/+-][0-9:/+ -]* \d\+)')+1+v:count)<CR>
        nnoremap <buffer> <silent> C    :<C-u>exe "vertical resize ".(<SID>linechars('^\S\+')+1+v:count)<CR>
        nnoremap <buffer> <silent> D    :<C-u>exe "vertical resize ".(<SID>linechars('.\{-\}\ze\d\ze\s\+\d\+)')+1-v:count)<CR>
        redraw
        syncbind
      endif
    finally
      if exists('l:cwd')
        execute cd s:fnameescape(cwd)
      endif
    endtry
    return ''
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  endtry
endfunction

function! s:BlameCommit(cmd, ...) abort
  let line = a:0 ? a:1 : getline('.')
  if line =~# '^0\{4,40\} '
    return 'echoerr ' . string('Not Committed Yet')
  endif
  let cmd = s:Edit(a:cmd, 0, '', matchstr(line, '\x\+'))
  if cmd =~# '^echoerr'
    return cmd
  endif
  let lnum = matchstr(line, ' \zs\d\+\ze\s\+[([:digit:]]')
  let path = matchstr(line, '^\^\=\x\+\s\+\zs.\{-\}\ze\s*\d\+ ')
  if path ==# ''
    let path = fugitive#Path(a:0 ? @% : bufname(b:fugitive_blamed_bufnr), '')
  endif
  execute cmd
  if a:cmd ==# 'pedit'
    return ''
  endif
  if search('^diff .* b/\M'.escape(path,'\').'$','W')
    call search('^+++')
    let head = line('.')
    while search('^@@ \|^diff ') && getline('.') =~# '^@@ '
      let top = +matchstr(getline('.'),' +\zs\d\+')
      let len = +matchstr(getline('.'),' +\d\+,\zs\d\+')
      if lnum >= top && lnum <= top + len
        let offset = lnum - top
        if &scrolloff
          +
          normal! zt
        else
          normal! zt
          +
        endif
        while offset > 0 && line('.') < line('$')
          +
          if getline('.') =~# '^[ +]'
            let offset -= 1
          endif
        endwhile
        return 'normal! zv'
      endif
    endwhile
    execute head
    normal! zt
  endif
  return ''
endfunction

function! s:BlameJump(suffix) abort
  let commit = matchstr(getline('.'),'^\^\=\zs\x\+')
  if commit =~# '^0\+$'
    let commit = ':0'
  endif
  let lnum = matchstr(getline('.'),' \zs\d\+\ze\s\+[([:digit:]]')
  let path = matchstr(getline('.'),'^\^\=\x\+\s\+\zs.\{-\}\ze\s*\d\+ ')
  if path ==# ''
    let path = fugitive#Path(bufname(b:fugitive_blamed_bufnr), '')
  endif
  let args = b:fugitive_blame_arguments
  let offset = line('.') - line('w0')
  let bufnr = bufnr('%')
  let winnr = bufwinnr(b:fugitive_blamed_bufnr)
  if winnr > 0
    exe winnr.'wincmd w'
  endif
  execute 'Gedit' s:fnameescape(commit . a:suffix . ':' . path)
  execute lnum
  if winnr > 0
    exe bufnr.'bdelete'
  endif
  if exists(':Gblame')
    execute 'Gblame '.args
    execute lnum
    let delta = line('.') - line('w0') - offset
    if delta > 0
      execute 'normal! '.delta."\<C-E>"
    elseif delta < 0
      execute 'normal! '.(-delta)."\<C-Y>"
    endif
    syncbind
  endif
  return ''
endfunction

let s:hash_colors = {}

function! s:BlameSyntax() abort
  let b:current_syntax = 'fugitiveblame'
  let conceal = has('conceal') ? ' conceal' : ''
  let arg = exists('b:fugitive_blame_arguments') ? b:fugitive_blame_arguments : ''
  syn match FugitiveblameBoundary "^\^"
  syn match FugitiveblameBlank                      "^\s\+\s\@=" nextgroup=FugitiveblameAnnotation,fugitiveblameOriginalFile,FugitiveblameOriginalLineNumber skipwhite
  syn match FugitiveblameHash       "\%(^\^\=\)\@<=\<\x\{7,40\}\>" nextgroup=FugitiveblameAnnotation,FugitiveblameOriginalLineNumber,fugitiveblameOriginalFile skipwhite
  syn match FugitiveblameUncommitted "\%(^\^\=\)\@<=\<0\{7,40\}\>" nextgroup=FugitiveblameAnnotation,FugitiveblameOriginalLineNumber,fugitiveblameOriginalFile skipwhite
  syn region FugitiveblameAnnotation matchgroup=FugitiveblameDelimiter start="(" end="\%( \d\+\)\@<=)" contained keepend oneline
  syn match FugitiveblameTime "[0-9:/+-][0-9:/+ -]*[0-9:/+-]\%( \+\d\+)\)\@=" contained containedin=FugitiveblameAnnotation
  exec 'syn match FugitiveblameLineNumber         " *\d\+)\@=" contained containedin=FugitiveblameAnnotation'.conceal
  exec 'syn match FugitiveblameOriginalFile       " \%(\f\+\D\@<=\|\D\@=\f\+\)\%(\%(\s\+\d\+\)\=\s\%((\|\s*\d\+)\)\)\@=" contained nextgroup=FugitiveblameOriginalLineNumber,FugitiveblameAnnotation skipwhite'.(arg =~# 'f' ? '' : conceal)
  exec 'syn match FugitiveblameOriginalLineNumber " *\d\+\%(\s(\)\@=" contained nextgroup=FugitiveblameAnnotation skipwhite'.(arg =~# 'n' ? '' : conceal)
  exec 'syn match FugitiveblameOriginalLineNumber " *\d\+\%(\s\+\d\+)\)\@=" contained nextgroup=FugitiveblameShort skipwhite'.(arg =~# 'n' ? '' : conceal)
  syn match FugitiveblameShort              " \d\+)" contained contains=FugitiveblameLineNumber
  syn match FugitiveblameNotCommittedYet "(\@<=Not Committed Yet\>" contained containedin=FugitiveblameAnnotation
  hi def link FugitiveblameBoundary           Keyword
  hi def link FugitiveblameHash               Identifier
  hi def link FugitiveblameUncommitted        Ignore
  hi def link FugitiveblameTime               PreProc
  hi def link FugitiveblameLineNumber         Number
  hi def link FugitiveblameOriginalFile       String
  hi def link FugitiveblameOriginalLineNumber Float
  hi def link FugitiveblameShort              FugitiveblameDelimiter
  hi def link FugitiveblameDelimiter          Delimiter
  hi def link FugitiveblameNotCommittedYet    Comment
  let seen = {}
  for lnum in range(1, line('$'))
    let hash = matchstr(getline(lnum), '^\^\=\zs\x\{6\}')
    if hash ==# '' || hash ==# '000000' || has_key(seen, hash)
      continue
    endif
    let seen[hash] = 1
    if &t_Co > 16 && get(g:, 'CSApprox_loaded') && !empty(findfile('autoload/csapprox/per_component.vim', escape(&rtp, ' ')))
          \ && empty(get(s:hash_colors, hash))
      let [s, r, g, b; __] = map(matchlist(hash, '\(\x\x\)\(\x\x\)\(\x\x\)'), 'str2nr(v:val,16)')
      let color = csapprox#per_component#Approximate(r, g, b)
      if color == 16 && &background ==# 'dark'
        let color = 8
      endif
      let s:hash_colors[hash] = ' ctermfg='.color
    else
      let s:hash_colors[hash] = ''
    endif
    exe 'syn match FugitiveblameHash'.hash.'       "\%(^\^\=\)\@<='.hash.'\x\{1,34\}\>" nextgroup=FugitiveblameAnnotation,FugitiveblameOriginalLineNumber,fugitiveblameOriginalFile skipwhite'
  endfor
  call s:RehighlightBlame()
endfunction

function! s:RehighlightBlame() abort
  for [hash, cterm] in items(s:hash_colors)
    if !empty(cterm) || has('gui_running') || has('termguicolors') && &termguicolors
      exe 'hi FugitiveblameHash'.hash.' guifg=#'.hash.get(s:hash_colors, hash, '')
    else
      exe 'hi link FugitiveblameHash'.hash.' Identifier'
    endif
  endfor
endfunction

" Section: Gbrowse

call s:command("-bar -bang -range=0 -nargs=* -complete=customlist,s:EditComplete Gbrowse :execute s:Browse(<bang>0,<line1>,<count>,<f-args>)")

let s:redirects = {}

function! s:Browse(bang,line1,count,...) abort
  try
    let validremote = '\.\|\.\=/.*\|[[:alnum:]_-]\+\%(://.\{-\}\)\='
    if a:0
      let remote = matchstr(join(a:000, ' '),'@\zs\%('.validremote.'\)$')
      let rev = substitute(join(a:000, ' '),'@\%('.validremote.'\)$','','')
    else
      let remote = ''
      let rev = ''
    endif
    if rev ==# ''
      let expanded = s:buffer().rev()
    elseif rev ==# ':'
      let expanded = s:Relative('/')
    else
      let expanded = s:buffer().expand(rev)
    endif
    if filereadable(s:repo().dir('refs/tags/' . expanded))
      let expanded = '.git/refs/tags/' . expanded
    endif
    let full = s:Generate(expanded)
    let commit = ''
    if full =~? '^fugitive:'
      let [dir, commit, path] = s:DirCommitFile(full)
      if commit =~# '^:\=\d$'
        let commit = ''
      endif
      if commit =~ '..'
        let type = s:TreeChomp('cat-file','-t',commit.s:sub(path,'^/',':'))
        let branch = matchstr(expanded, '^[^:]*')
      else
        let type = 'blob'
      endif
      let path = path[1:-1]
    elseif s:repo().bare()
      let path = '.git/' . full[strlen(s:repo().dir())+1:-1]
      let type = ''
    else
      let path = full[strlen(s:repo().tree())+1:-1]
      if path =~# '^\.git/'
        let type = ''
      elseif isdirectory(full)
        let type = 'tree'
      else
        let type = 'blob'
      endif
    endif
    if type ==# 'tree' && !empty(path)
      let path = s:sub(path, '/\=$', '/')
    endif
    if path =~# '^\.git/.*HEAD' && filereadable(s:repo().dir(path[5:-1]))
      let body = readfile(s:repo().dir(path[5:-1]))[0]
      if body =~# '^\x\{40\}$'
        let commit = body
        let type = 'commit'
        let path = ''
      elseif body =~# '^ref: refs/'
        let path = '.git/' . matchstr(body,'ref: \zs.*')
      endif
    endif

    let merge = ''
    if path =~# '^\.git/refs/remotes/.'
      if empty(remote)
        let remote = matchstr(path, '^\.git/refs/remotes/\zs[^/]\+')
        let branch = matchstr(path, '^\.git/refs/remotes/[^/]\+/\zs.\+')
      else
        let merge = matchstr(path, '^\.git/refs/remotes/[^/]\+/\zs.\+')
        let path = '.git/refs/heads/'.merge
      endif
    elseif path =~# '^\.git/refs/heads/.'
      let branch = path[16:-1]
    elseif !exists('branch')
      let branch = s:repo().head()
    endif
    if !empty(branch)
      let r = fugitive#Config('branch.'.branch.'.remote')
      let m = fugitive#Config('branch.'.branch.'.merge')[11:-1]
      if r ==# '.' && !empty(m)
        let r2 = fugitive#Config('branch.'.m.'.remote')
        if r2 !~# '^\.\=$'
          let r = r2
          let m = fugitive#Config('branch.'.m.'.merge')[11:-1]
        endif
      endif
      if empty(remote)
        let remote = r
      endif
      if r ==# '.' || r ==# remote
        let merge = m
        if path =~# '^\.git/refs/heads/.'
          let path = '.git/refs/heads/'.merge
        endif
      endif
    endif

    if empty(commit) && path !~# '^\.git/'
      if a:line1 && !a:count && !empty(merge)
        let commit = merge
      else
        let commit = s:repo().rev_parse('HEAD')
      endif
    endif

    if empty(remote)
      let remote = '.'
    endif
    let raw = fugitive#RemoteUrl(remote)
    if empty(raw)
      let raw = remote
    endif

    if raw =~# '^https\=://' && s:executable('curl')
      if !has_key(s:redirects, raw)
        let s:redirects[raw] = matchstr(system('curl -I ' .
              \ s:shellesc(raw . '/info/refs?service=git-upload-pack')),
              \ 'Location: \zs\S\+\ze/info/refs?')
      endif
      if len(s:redirects[raw])
        let raw = s:redirects[raw]
      endif
    endif

    let opts = {
          \ 'dir': b:git_dir,
          \ 'repo': s:repo(),
          \ 'remote': raw,
          \ 'revision': 'No longer provided',
          \ 'commit': commit,
          \ 'path': path,
          \ 'type': type,
          \ 'line1': a:count > 0 ? a:line1 : 0,
          \ 'line2': a:count > 0 ? a:count : 0}

    for Handler in get(g:, 'fugitive_browse_handlers', [])
      let url = call(Handler, [copy(opts)])
      if !empty(url)
        break
      endif
    endfor

    if empty(url)
      call s:throw("No Gbrowse handler found for '".raw."'")
    endif

    let url = s:gsub(url, '[ <>]', '\="%".printf("%02X",char2nr(submatch(0)))')
    if a:bang
      if has('clipboard')
        let @+ = url
      endif
      return 'echomsg '.string(url)
    elseif exists(':Browse') == 2
      return 'echomsg '.string(url).'|Browse '.url
    else
      if !exists('g:loaded_netrw')
        runtime! autoload/netrw.vim
      endif
      if exists('*netrw#BrowseX')
        return 'echomsg '.string(url).'|call netrw#BrowseX('.string(url).', 0)'
      else
        return 'echomsg '.string(url).'|call netrw#NetrwBrowseX('.string(url).', 0)'
      endif
    endif
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  endtry
endfunction

" Section: File access

function! s:ReplaceCmd(cmd) abort
  let tmp = tempname()
  let err = s:TempCmd(tmp, a:cmd)
  if v:shell_error
    call s:throw((len(err) ? err : filereadable(tmp) ? join(readfile(tmp), ' ') : 'unknown error running ' . a:cmd))
  endif
  let fn = expand('%:p')
  silent exe 'doau BufReadPre '.s:fnameescape(fn)
  silent exe 'keepalt file '.tmp
  try
    silent noautocmd edit!
  finally
    try
      silent exe 'keepalt file '.s:fnameescape(fn)
    catch /^Vim\%((\a\+)\)\=:E302:/
    endtry
    call delete(tmp)
    if fnamemodify(bufname('$'), ':p') ==# tmp
      silent execute 'bwipeout '.bufnr('$')
    endif
    silent exe 'doau BufReadPost '.s:fnameescape(fn)
  endtry
endfunction

function! fugitive#BufReadStatus() abort
  let amatch = s:shellslash(expand('%:p'))
  if !exists('b:fugitive_display_format')
    let b:fugitive_display_format = filereadable(expand('%').'.lock')
  endif
  let b:fugitive_display_format = b:fugitive_display_format % 2
  let b:fugitive_type = 'index'
  try
    let dir = fnamemodify(amatch, ':h')
    setlocal noro ma nomodeline
    let prefix = ''
    if s:cpath(fnamemodify($GIT_INDEX_FILE !=# '' ? $GIT_INDEX_FILE : b:git_dir . '/index', ':p')) !=# s:cpath(amatch)
      if s:winshell()
        let old_index = $GIT_INDEX_FILE
      else
        let prefix = 'env GIT_INDEX_FILE='.s:shellesc(amatch).' '
      endif
    endif
    if b:fugitive_display_format
      let cmd = ['ls-files', '--stage']
    elseif fugitive#GitVersion() =~# '^0\|^1\.[1-7]\.'
      let cmd = ['status']
    else
      let cmd = [
            \ '-c', 'status.displayCommentPrefix=true',
            \ '-c', 'color.status=false',
            \ '-c', 'status.short=false',
            \ 'status']
    endif
    let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
    let cwd = getcwd()
    let cmd_str = prefix . call('fugitive#Prepare', [dir] + cmd)
    try
      if exists('old_index')
        let $GIT_INDEX_FILE = amatch
      endif
      execute cd s:fnameescape(FugitiveTreeForGitDir(dir))
      call s:ReplaceCmd(cmd_str)
    finally
      if exists('old_index')
        let $GIT_INDEX_FILE = old_index
      endif
      execute cd s:fnameescape(cwd)
    endtry
    if b:fugitive_display_format
      if &filetype !=# 'git'
        set filetype=git
      endif
      set nospell
    else
      if &filetype !=# 'gitcommit'
        set filetype=gitcommit
      endif
      set foldtext=fugitive#Foldtext()
    endif
    setlocal readonly nomodifiable nomodified noswapfile
    if &bufhidden ==# ''
      setlocal bufhidden=delete
    endif
    call fugitive#MapJumps()
    nunmap   <buffer>          P
    nunmap   <buffer>          ~
    nnoremap <buffer> <silent> <C-N> :<C-U>execute <SID>StageNext(v:count1)<CR>
    nnoremap <buffer> <silent> <C-P> :<C-U>execute <SID>StagePrevious(v:count1)<CR>
    nnoremap <buffer> <silent> - :<C-U>silent execute <SID>StageToggle(line('.'),line('.')+v:count1-1)<CR>
    xnoremap <buffer> <silent> - :<C-U>silent execute <SID>StageToggle(line("'<"),line("'>"))<CR>
    nnoremap <buffer> <silent> a :<C-U>let b:fugitive_display_format += 1<Bar>exe fugitive#BufReadStatus()<CR>
    nnoremap <buffer> <silent> i :<C-U>let b:fugitive_display_format -= 1<Bar>exe fugitive#BufReadStatus()<CR>
    nnoremap <buffer> <silent> C :<C-U>Gcommit<CR>:echohl WarningMsg<Bar>echo ':Gstatus C is deprecated in favor of cc'<Bar>echohl NONE<CR>
    nnoremap <buffer> <silent> cA :<C-U>Gcommit --amend --reuse-message=HEAD<CR>:echohl WarningMsg<Bar>echo ':Gstatus cA is deprecated in favor of ce'<Bar>echohl NONE<CR>
    nnoremap <buffer> <silent> ca :<C-U>Gcommit --amend<CR>
    nnoremap <buffer> <silent> cc :<C-U>Gcommit<CR>
    nnoremap <buffer> <silent> ce :<C-U>Gcommit --amend --no-edit<CR>
    nnoremap <buffer> <silent> cw :<C-U>Gcommit --amend --only<CR>
    nnoremap <buffer> <silent> cva :<C-U>Gcommit -v --amend<CR>
    nnoremap <buffer> <silent> cvc :<C-U>Gcommit -v<CR>
    nnoremap <buffer> <silent> D :<C-U>execute <SID>StageDiff('Gdiff')<CR>
    nnoremap <buffer> <silent> dd :<C-U>execute <SID>StageDiff('Gdiff')<CR>
    nnoremap <buffer> <silent> dh :<C-U>execute <SID>StageDiff('Gsdiff')<CR>
    nnoremap <buffer> <silent> ds :<C-U>execute <SID>StageDiff('Gsdiff')<CR>
    nnoremap <buffer> <silent> dp :<C-U>execute <SID>StageDiffEdit()<CR>
    nnoremap <buffer> <silent> dv :<C-U>execute <SID>StageDiff('Gvdiff')<CR>
    nnoremap <buffer> <silent> p :<C-U>execute <SID>StagePatch(line('.'),line('.')+v:count1-1)<CR>
    xnoremap <buffer> <silent> p :<C-U>execute <SID>StagePatch(line("'<"),line("'>"))<CR>
    nnoremap <buffer> <silent> P :<C-U>execute <SID>StagePatch(line('.'),line('.')+v:count1-1)<CR>
    xnoremap <buffer> <silent> P :<C-U>execute <SID>StagePatch(line("'<"),line("'>"))<CR>
    nnoremap <buffer> <silent> q :<C-U>if bufnr('$') == 1<Bar>quit<Bar>else<Bar>bdelete<Bar>endif<CR>
    nnoremap <buffer> <silent> r :<C-U>edit<CR>
    nnoremap <buffer> <silent> R :<C-U>edit<CR>
    nnoremap <buffer> <silent> U :<C-U>execute <SID>StageUndo()<CR>
    nnoremap <buffer> <silent> g?   :help fugitive-:Gstatus<CR>
    nnoremap <buffer> <silent> <F1> :help fugitive-:Gstatus<CR>
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  endtry
endfunction

function! fugitive#FileReadCmd(...) abort
  let amatch = a:0 ? a:1 : expand('<amatch>')
  let [dir, rev] = s:DirRev(amatch)
  let line = a:0 > 1 ? a:2 : line("'[")
  if empty(dir)
    return 'noautocmd ' . line . 'read ' . s:fnameescape(amatch)
  endif
  if rev !~# ':'
    let cmd = fugitive#Prepare(dir, 'log', '--pretty=format:%B', '-1', rev)
  else
    let cmd = fugitive#Prepare(dir, 'cat-file', '-p', rev)
  endif
  return line . 'read !' . escape(cmd, '!#%')
endfunction

function! fugitive#FileWriteCmd(...) abort
  let tmp = tempname()
  let amatch = a:0 ? a:1 : expand('<amatch>')
  let autype = a:0 > 1 ? 'Buf' : 'File'
  if exists('#' . autype . 'WritePre')
    execute 'doautocmd ' . autype . 'WritePre ' . s:fnameescape(amatch)
  endif
  try
    let [dir, commit, file] = s:DirCommitFile(amatch)
    if commit !~# '^[0-3]$' || !v:cmdbang && (line("'[") != 1 || line("']") != line('$'))
      return "noautocmd '[,']write" . (v:cmdbang ? '!' : '') . ' ' . s:fnameescape(amatch)
    endif
    silent execute "'[,']write !".fugitive#Prepare(dir, 'hash-object', '-w', '--stdin').' > '.tmp
    let sha1 = readfile(tmp)[0]
    let old_mode = matchstr(system(fugitive#Prepare(dir, 'ls-files', '--stage', file[1:-1])), '^\d\+')
    if old_mode == ''
      let old_mode = executable(FugitiveTreeForGitDir(dir) . file) ? '100755' : '100644'
    endif
    let info = old_mode.' '.sha1.' '.commit."\t".file[1:-1]
    call writefile([info],tmp)
    if s:winshell()
      let error = s:System('type '.s:gsub(tmp,'/','\\').'|'.fugitive#Prepare(dir, 'update-index', '--index-info'))
    else
      let error = s:System(fugitive#Prepare(dir, 'update-index', '--index-info').' < '.tmp)
    endif
    if v:shell_error == 0
      setlocal nomodified
      if exists('#' . autype . 'WritePost')
        execute 'doautocmd ' . autype . 'WritePost ' . s:fnameescape(amatch)
      endif
      call fugitive#ReloadStatus()
      return ''
    else
      return 'echoerr '.string('fugitive: '.error)
    endif
  finally
    call delete(tmp)
  endtry
endfunction

function! fugitive#BufReadCmd(...) abort
  let amatch = a:0 ? a:1 : expand('<amatch>')
  try
    let [dir, rev] = s:DirRev(amatch)
    if empty(dir)
      return 'echo "Invalid Fugitive URL"'
    endif
    let b:fugitive_type = system(fugitive#Prepare(dir, 'cat-file', '-t', rev))[0:-2]
    if v:shell_error
      unlet b:fugitive_type
      return 'silent doautocmd BufNewFile '.s:fnameescape(amatch)
    elseif b:fugitive_type !~# '^\%(tag\|commit\|tree\|blob\)$'
      return "echoerr ".string("fugitive: unrecognized git type '".b:fugitive_type."'")
    endif
    if !exists('b:fugitive_display_format') && b:fugitive_type != 'blob'
      let b:fugitive_display_format = +getbufvar('#','fugitive_display_format')
    endif

    if b:fugitive_type !=# 'blob'
      setlocal nomodeline
    endif

    setlocal noreadonly modifiable
    let pos = getpos('.')
    silent keepjumps %delete_
    setlocal endofline

    try
      if b:fugitive_type ==# 'tree'
        let b:fugitive_display_format = b:fugitive_display_format % 2
        if b:fugitive_display_format
          call s:ReplaceCmd([dir, 'ls-tree', rev])
        else
          let sha = system(fugitive#Prepare(dir, 'rev-parse', '--verify', rev))[0:-2]
          call s:ReplaceCmd([dir, 'show', '--no-color', sha])
        endif
      elseif b:fugitive_type ==# 'tag'
        let b:fugitive_display_format = b:fugitive_display_format % 2
        if b:fugitive_display_format
          call s:ReplaceCmd([dir, 'cat-file', b:fugitive_type, rev])
        else
          call s:ReplaceCmd([dir, 'cat-file', '-p', rev])
        endif
      elseif b:fugitive_type ==# 'commit'
        let b:fugitive_display_format = b:fugitive_display_format % 2
        if b:fugitive_display_format
          call s:ReplaceCmd([dir, 'cat-file', b:fugitive_type, rev])
        else
          call s:ReplaceCmd([dir, 'show', '--no-color', '--pretty=format:tree%x20%T%nparent%x20%P%nauthor%x20%an%x20<%ae>%x20%ad%ncommitter%x20%cn%x20<%ce>%x20%cd%nencoding%x20%e%n%n%s%n%n%b', rev])
          keepjumps call search('^parent ')
          if getline('.') ==# 'parent '
            silent keepjumps delete_
          else
            silent exe 'keepjumps s/\m\C\%(^parent\)\@<! /\rparent /e' . (&gdefault ? '' : 'g')
          endif
          keepjumps let lnum = search('^encoding \%(<unknown>\)\=$','W',line('.')+3)
          if lnum
            silent keepjumps delete_
          end
          silent keepjumps 1,/^diff --git\|\%$/g/\r$/s///
          keepjumps 1
        endif
      elseif b:fugitive_type ==# 'blob'
        call s:ReplaceCmd([dir, 'cat-file', b:fugitive_type, rev])
        setlocal nomodeline
      endif
    finally
      keepjumps call setpos('.',pos)
      setlocal nomodified noswapfile
      if rev !~# '^:.'
        setlocal readonly nomodifiable
      endif
      if &bufhidden ==# ''
        setlocal bufhidden=delete
      endif
      if b:fugitive_type !=# 'blob'
        setlocal filetype=git foldmethod=syntax
        nnoremap <buffer> <silent> a :<C-U>let b:fugitive_display_format += v:count1<Bar>exe fugitive#BufReadCmd(@%)<CR>
        nnoremap <buffer> <silent> i :<C-U>let b:fugitive_display_format -= v:count1<Bar>exe fugitive#BufReadCmd(@%)<CR>
      else
        call fugitive#MapJumps()
      endif
    endtry

    return ''
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  endtry
endfunction

function! fugitive#BufWriteCmd(...) abort
  return fugitive#FileWriteCmd(a:0 ? a:1 : expand('<amatch>'), 1)
endfunction

function! fugitive#SourceCmd(...) abort
  let amatch = a:0 ? a:1 : expand('<amatch>')
  let temp = s:BlobTemp(amatch)
  if empty(temp)
    return 'noautocmd source ' . s:fnameescape(amatch)
  endif
  if !exists('g:virtual_scriptnames')
    let g:virtual_scriptnames = {}
  endif
  let g:virtual_scriptnames[temp] = amatch
  return 'source ' . s:fnameescape(temp)
endfunction

" Section: Temp files

if !exists('s:temp_files')
  let s:temp_files = {}
endif

augroup fugitive_temp
  autocmd!
  autocmd BufNewFile,BufReadPost *
        \ if has_key(s:temp_files,s:cpath(expand('<afile>:p'))) |
        \   let b:git_dir = s:temp_files[s:cpath(expand('<afile>:p'))].dir |
        \   call extend(b:, {'fugitive_type': 'temp'}, 'keep') |
        \   let b:git_args = s:temp_files[s:cpath(expand('<afile>:p'))].args |
        \   call FugitiveDetect(expand('<afile>:p')) |
        \   setlocal bufhidden=delete nobuflisted |
        \   nnoremap <buffer> <silent> q    :<C-U>bdelete<CR>|
        \ endif
augroup END

" Section: Go to file

nnoremap <SID>: :<C-U><C-R>=v:count ? v:count : ''<CR>
function! fugitive#MapCfile(...) abort
  exe 'cnoremap <buffer> <expr> <Plug><cfile>' (a:0 ? a:1 : 'fugitive#Cfile()')
  let b:undo_ftplugin = get(b:, 'undo_ftplugin', 'exe') . '|sil! exe "cunmap <buffer> <Plug><cfile>"'
  if !exists('g:fugitive_no_maps')
    call s:map('n', 'gf',          '<SID>:find <Plug><cfile><CR>', '<silent><unique>', 1)
    call s:map('n', '<C-W>f',     '<SID>:sfind <Plug><cfile><CR>', '<silent><unique>', 1)
    call s:map('n', '<C-W><C-F>', '<SID>:sfind <Plug><cfile><CR>', '<silent><unique>', 1)
    call s:map('n', '<C-W>gf',  '<SID>:tabfind <Plug><cfile><CR>', '<silent><unique>', 1)
    call s:map('c', '<C-R><C-F>', '<Plug><cfile>', '<silent><unique>', 1)
  endif
endfunction

function! s:ContainingCommit() abort
  let commit = s:DirCommitFile(@%)[1]
  if commit =~# '^\d\=$'
    return 'HEAD'
  else
    return commit
  endif
endfunction

function! s:NavigateUp(count) abort
  let rev = s:buffer().rev()
  let c = a:count
  while c
    if rev =~# '^[/:]$'
      let rev = 'HEAD'
    elseif rev =~# '^:'
      let rev = ':'
    elseif rev =~# '^refs/[^^~:]*$\|^[^^~:]*HEAD$'
      let rev .= '^{}'
    elseif rev =~# '^/\|:.*/'
      let rev = s:sub(rev, '.*\zs/.*', '')
    elseif rev =~# ':.'
      let rev = matchstr(rev, '^[^:]*:')
    elseif rev =~# ':$'
      let rev = rev[0:-2]
    else
      return rev.'~'.c
    endif
    let c -= 1
  endwhile
  return rev
endfunction

function! fugitive#MapJumps(...) abort
  if get(b:, 'fugitive_type', '') ==# 'blob'
    nnoremap <buffer> <silent> <CR>    :<C-U>.Gblame<CR>
  else
    nnoremap <buffer> <silent> <CR>    :<C-U>exe <SID>GF("edit")<CR>
  endif
  if !&modifiable
    nnoremap <buffer> <silent> o     :<C-U>exe <SID>GF("split")<CR>
    nnoremap <buffer> <silent> S     :<C-U>exe <SID>GF("vsplit")<CR>
    nnoremap <buffer> <silent> O     :<C-U>exe <SID>GF("tabedit")<CR>
    nnoremap <buffer> <silent> o     :<C-U>exe <SID>GF("split")<CR>
    nnoremap <buffer> <silent> S     :<C-U>exe <SID>GF("vsplit")<CR>
    nnoremap <buffer> <silent> O     :<C-U>exe <SID>GF("tabedit")<CR>
    if get(b:, 'fugitive_type', '') ==# 'blob'
      nnoremap <buffer> <silent> o     :<C-U>.,.+1Gblame<CR>
      nnoremap <buffer> <silent> S     :<C-U>vertical .,.+1Gblame<CR>
      nnoremap <buffer> <silent> O     :<C-U>tab .,.+1Gblame<CR>
      nnoremap <buffer> <silent> p     :<C-U>.,.+2Gblame<CR>
    else
      nnoremap <buffer> <silent> o     :<C-U>exe <SID>GF("split")<CR>
      nnoremap <buffer> <silent> S     :<C-U>exe <SID>GF("vsplit")<CR>
      nnoremap <buffer> <silent> O     :<C-U>exe <SID>GF("tabedit")<CR>
      nnoremap <buffer> <silent> p     :<C-U>exe <SID>GF("pedit")<CR>
    endif
    nnoremap <buffer> <silent> -     :<C-U>exe 'Gedit ' . <SID>fnameescape(<SID>NavigateUp(v:count1))<Bar> if getline(1) =~# '^tree \x\{40\}$' && empty(getline(2))<Bar>call search('^'.escape(expand('#:t'),'.*[]~\').'/\=$','wc')<Bar>endif<CR>
    nnoremap <buffer> <silent> P     :<C-U>exe 'Gedit ' . <SID>fnameescape(<SID>ContainingCommit().'^'.v:count1.<SID>Relative(':'))<CR>
    nnoremap <buffer> <silent> ~     :<C-U>exe 'Gedit ' . <SID>fnameescape(<SID>ContainingCommit().'~'.v:count1.<SID>Relative(':'))<CR>
    nnoremap <buffer> <silent> C     :<C-U>exe 'Gedit ' . <SID>fnameescape(<SID>ContainingCommit())<CR>
    nnoremap <buffer> <silent> cc    :<C-U>exe 'Gedit ' . <SID>fnameescape(<SID>ContainingCommit())<CR>
    nnoremap <buffer> <silent> co    :<C-U>exe 'Gsplit ' . <SID>fnameescape(<SID>ContainingCommit())<CR>
    nnoremap <buffer> <silent> cS    :<C-U>exe 'Gvsplit ' . <SID>fnameescape(<SID>ContainingCommit())<CR>
    nnoremap <buffer> <silent> cO    :<C-U>exe 'Gtabedit ' . <SID>fnameescape(<SID>ContainingCommit())<CR>
    nnoremap <buffer> <silent> cP    :<C-U>exe 'Gpedit ' . <SID>fnameescape(<SID>ContainingCommit())<CR>
    nnoremap <buffer>          .     : <C-R>=fnameescape(<SID>recall())<CR><Home>
  endif
endfunction

function! s:StatusCfile(...) abort
  let pre = ''
  if getline('.') =~# '^.\=\trenamed:.* -> '
    return '/'.matchstr(getline('.'),' -> \zs.*')
  elseif getline('.') =~# '^.\=\t\(\k\| \)\+\p\?: *.'
    return '/'.matchstr(getline('.'),': *\zs.\{-\}\ze\%( ([^()[:digit:]]\+)\)\=$')
  elseif getline('.') =~# '^.\=\t.'
    return '/'.matchstr(getline('.'),'\t\zs.*')
  elseif getline('.') =~# ': needs merge$'
    return '/'.matchstr(getline('.'),'.*\ze: needs merge$')
  elseif getline('.') =~# '^\%(. \)\=Not currently on any branch.$'
    return 'HEAD'
  elseif getline('.') =~# '^\%(. \)\=On branch '
    return 'refs/heads/'.getline('.')[12:]
  elseif getline('.') =~# "^\\%(. \\)\=Your branch .*'"
    return matchstr(getline('.'),"'\\zs\\S\\+\\ze'")
  else
    return ''
  endif
endfunction

function! fugitive#StatusCfile() abort
  let file = s:StatusCfile()
  return empty(file) ? "\<C-R>\<C-F>" : s:fnameescape(s:Generate(file))
endfunction

function! s:cfile() abort
  try
    let myhash = s:DirRev(@%)[1]
    if len(myhash)
      try
        let myhash = s:repo().rev_parse(myhash)
      catch /^fugitive:/
        let myhash = ''
      endtry
    endif
    if empty(myhash) && getline(1) =~# '^\%(commit\|tag\) \w'
      let myhash = matchstr(getline(1),'^\w\+ \zs\S\+')
    endif

    let treebase = s:DirCommitFile(@%)[1].':'.s:Relative('').(s:Relative('') =~# '^$\|/$' ? '' : '/')
    if treebase !~# '^\d\=:' && getline('.') =~# '^\d\{6\} \l\{3,8\} \x\{40\}\t'
      return [treebase . s:sub(matchstr(getline('.'),'\t\zs.*'),'/$','')]
    elseif treebase !~# '^\d\=:' && getline(1) =~# '^tree ' && empty(getline(2)) && line('.') >= 2
      return [treebase . s:sub(getline('.'),'/$','')]

    else

      let dcmds = []

      " Index
      if getline('.') =~# '^\d\{6\} \x\{40\} \d\t'
        let ref = matchstr(getline('.'),'\x\{40\}')
        let file = ':'.s:sub(matchstr(getline('.'),'\d\t.*'),'\t',':')
        return [file]
      endif

      let showtree = (getline(1) =~# '^tree ' && getline(2) == "")

      if getline('.') =~# '^ref: '
        let ref = strpart(getline('.'),5)

      elseif getline('.') =~# '^commit \x\{40\}\>'
        let ref = matchstr(getline('.'),'\x\{40\}')
        return [ref]

      elseif getline('.') =~# '^parent \x\{40\}\>'
        let ref = matchstr(getline('.'),'\x\{40\}')
        let line = line('.')
        let parent = 0
        while getline(line) =~# '^parent '
          let parent += 1
          let line -= 1
        endwhile
        return [ref]

      elseif getline('.') =~ '^tree \x\{40\}$'
        let ref = matchstr(getline('.'),'\x\{40\}')
        if s:repo().rev_parse(myhash.':') == ref
          let ref = myhash.':'
        endif
        return [ref]

      elseif getline('.') =~# '^object \x\{40\}$' && getline(line('.')+1) =~ '^type \%(commit\|tree\|blob\)$'
        let ref = matchstr(getline('.'),'\x\{40\}')
        let type = matchstr(getline(line('.')+1),'type \zs.*')

      elseif getline('.') =~# '^\l\{3,8\} '.myhash.'$'
        let ref = s:buffer().rev()

      elseif getline('.') =~# '^\l\{3,8\} \x\{40\}\>'
        let ref = matchstr(getline('.'),'\x\{40\}')
        echoerr "warning: unknown context ".matchstr(getline('.'),'^\l*')

      elseif getline('.') =~# '^[+-]\{3\} [abciow12]\=/'
        let ref = getline('.')[4:]

      elseif getline('.') =~# '^[+-]' && search('^@@ -\d\+\%(,\d\+\)\= +\d\+','bnW')
        let type = getline('.')[0]
        let lnum = line('.') - 1
        let offset = 0
        while getline(lnum) !~# '^@@ -\d\+\%(,\d\+\)\= +\d\+'
          if getline(lnum) =~# '^[ '.type.']'
            let offset += 1
          endif
          let lnum -= 1
        endwhile
        let offset += matchstr(getline(lnum), type.'\zs\d\+')
        let ref = getline(search('^'.type.'\{3\} [abciow12]/','bnW'))[4:-1]
        let dcmds = [offset, 'normal!zv']

      elseif getline('.') =~# '^rename from '
        let ref = 'a/'.getline('.')[12:]
      elseif getline('.') =~# '^rename to '
        let ref = 'b/'.getline('.')[10:]

      elseif getline('.') =~# '^@@ -\d\+\%(,\d\+\)\= +\d\+'
        let diff = getline(search('^diff --git \%([abciow12]/.*\|/dev/null\) \%([abciow12]/.*\|/dev/null\)', 'bcnW'))
        let offset = matchstr(getline('.'), '+\zs\d\+')

        let dref = matchstr(diff, '\Cdiff --git \zs\%([abciow12]/.*\|/dev/null\)\ze \%([abciow12]/.*\|/dev/null\)')
        let ref = matchstr(diff, '\Cdiff --git \%([abciow12]/.*\|/dev/null\) \zs\%([abciow12]/.*\|/dev/null\)')
        let dcmd = 'Gdiff! +'.offset

      elseif getline('.') =~# '^diff --git \%([abciow12]/.*\|/dev/null\) \%([abciow12]/.*\|/dev/null\)'
        let dref = matchstr(getline('.'),'\Cdiff --git \zs\%([abciow12]/.*\|/dev/null\)\ze \%([abciow12]/.*\|/dev/null\)')
        let ref = matchstr(getline('.'),'\Cdiff --git \%([abciow12]/.*\|/dev/null\) \zs\%([abciow12]/.*\|/dev/null\)')
        let dcmd = 'Gdiff!'

      elseif getline('.') =~# '^index ' && getline(line('.')-1) =~# '^diff --git \%([abciow12]/.*\|/dev/null\) \%([abciow12]/.*\|/dev/null\)'
        let line = getline(line('.')-1)
        let dref = matchstr(line,'\Cdiff --git \zs\%([abciow12]/.*\|/dev/null\)\ze \%([abciow12]/.*\|/dev/null\)')
        let ref = matchstr(line,'\Cdiff --git \%([abciow12]/.*\|/dev/null\) \zs\%([abciow12]/.*\|/dev/null\)')
        let dcmd = 'Gdiff!'

      elseif line('$') == 1 && getline('.') =~ '^\x\{40\}$'
        let ref = getline('.')

      elseif expand('<cword>') =~# '^\x\{7,40\}\>'
        return [expand('<cword>')]

      else
        let ref = ''
      endif

      let prefixes = {
            \ '1': '',
            \ '2': '',
            \ 'b': ':0:',
            \ 'i': ':0:',
            \ 'o': '',
            \ 'w': ''}

      if len(myhash)
        let prefixes.a = myhash.'^:'
        let prefixes.b = myhash.':'
      endif
      let ref = substitute(ref, '^\(\w\)/', '\=get(prefixes, submatch(1), "HEAD:")', '')
      if exists('dref')
        let dref = substitute(dref, '^\(\w\)/', '\=get(prefixes, submatch(1), "HEAD:")', '')
      endif

      if ref ==# '/dev/null'
        " Empty blob
        let ref = 'e69de29bb2d1d6434b8b29ae775ad8c2e48c5391'
      endif

      if exists('dref')
        return [ref, dcmd . ' ' . s:fnameescape(dref)] + dcmds
      elseif ref != ""
        return [ref] + dcmds
      endif

    endif
    return []
  endtry
endfunction

function! s:GF(mode) abort
  try
    let results = &filetype ==# 'gitcommit' ? [s:StatusCfile()] : s:cfile()
  catch /^fugitive:/
    return 'echoerr v:errmsg'
  endtry
  if len(results) > 1 && a:mode ==# 'pedit'
    return a:mode .
          \ ' +' . join(map(results[1:-1], 'escape(v:val, " ")'), '\|') . ' ' .
          \ s:fnameescape(s:Generate(results[0]))
  elseif len(results)
    return s:Edit(a:mode, 0, '', results[0]).join(map(results[1:-1], '"|".v:val'), '')
  else
    return ''
  endif
endfunction

function! fugitive#Cfile() abort
  let pre = ''
  let results = s:cfile()
  if empty(results)
    let cfile = expand('<cfile>')
    if &includeexpr =~# '\<v:fname\>'
      sandbox let cfile = eval(substitute(&includeexpr, '\C\<v:fname\>', '\=string(cfile)', 'g'))
    endif
    return cfile
  elseif len(results) > 1
    let pre = '+' . join(map(results[1:-1], 'escape(v:val, " ")'), '\|') . ' '
  endif
  return pre . s:fnameescape(s:Generate(results[0]))
endfunction

" Section: Statusline

function! fugitive#Statusline(...) abort
  if !exists('b:git_dir')
    return ''
  endif
  let status = ''
  let commit = s:DirCommitFile(@%)[1]
  if len(commit)
    let status .= ':' . commit[0:7]
  endif
  let status .= '('.FugitiveHead(7).')'
  return '[Git'.status.']'
endfunction

function! fugitive#statusline(...) abort
  return fugitive#Statusline()
endfunction

function! fugitive#head(...) abort
  if !exists('b:git_dir')
    return ''
  endif

  return s:repo().head(a:0 ? a:1 : 0)
endfunction

" Section: Folding

function! fugitive#Foldtext() abort
  if &foldmethod !=# 'syntax'
    return foldtext()
  endif

  let line_foldstart = getline(v:foldstart)
  if line_foldstart =~# '^diff '
    let [add, remove] = [-1, -1]
    let filename = ''
    for lnum in range(v:foldstart, v:foldend)
      let line = getline(lnum)
      if filename ==# '' && line =~# '^[+-]\{3\} [abciow12]/'
        let filename = line[6:-1]
      endif
      if line =~# '^+'
        let add += 1
      elseif line =~# '^-'
        let remove += 1
      elseif line =~# '^Binary '
        let binary = 1
      endif
    endfor
    if filename ==# ''
      let filename = matchstr(line_foldstart, '^diff .\{-\} [abciow12]/\zs.*\ze [abciow12]/')
    endif
    if filename ==# ''
      let filename = line_foldstart[5:-1]
    endif
    if exists('binary')
      return 'Binary: '.filename
    else
      return (add<10&&remove<100?' ':'') . add . '+ ' . (remove<10&&add<100?' ':'') . remove . '- ' . filename
    endif
  elseif line_foldstart =~# '^# .*:$'
    let lines = getline(v:foldstart, v:foldend)
    call filter(lines, 'v:val =~# "^#\t"')
    cal map(lines, "s:sub(v:val, '^#\t%(modified: +|renamed: +)=', '')")
    cal map(lines, "s:sub(v:val, '^([[:alpha:] ]+): +(.*)', '\\2 (\\1)')")
    return line_foldstart.' '.join(lines, ', ')
  endif
  return foldtext()
endfunction

function! fugitive#foldtext() abort
  return fugitive#Foldtext()
endfunction

augroup fugitive_folding
  autocmd!
  autocmd User Fugitive
        \ if &filetype =~# '^git\%(commit\)\=$' && &foldtext ==# 'foldtext()' |
        \    set foldtext=fugitive#Foldtext() |
        \ endif
augroup END