Attempt to catch overlapping status reloads

README.markdown

@@ -86,8 +86,7 @@ For more information, see `:help fugitive`.
 
 ## Installation
 
-Install using your favorite package manager, or use Vim's built-in package
+Install using your favorite package manager, or use Vim's built-in package support:
-support:
 
     mkdir -p ~/.vim/pack/tpope/start
     cd ~/.vim/pack/tpope/start
@@ -104,17 +103,6 @@ it was removed.  Use `:Git! push` to use Fugitive's own asynchronous
 execution, or retroactively make `:Git push` asynchronous by pressing
 `CTRL-D`.
 
-> Why am I getting `core.worktree is required when using an external Git dir`?
-
-Git generally sets `core.worktree` for you automatically when necessary, but
-if you're doing something weird, or using a third-party tool that does
-something weird, you may need to set it manually:
-
-    git config core.worktree "$PWD"
-
-This may be necessary even when simple `git` commands seem to work fine
-without it.
-
 > So I have a symlink and...
 
 Stop.  Just stop.  If Git won't deal with your symlink, then Fugitive won't

doc/fugitive.txt

@@ -70,8 +70,8 @@ that are part of Git repositories).
                         O     jump to patch or blob in new tab
                         p     jump to patch or blob in preview window
                         -     reblame at commit
-                        ~     reblame at commit~[count]
+                        ~     reblame at [count]th first grandparent
-                        P     reblame at commit^[count]
+                        P     reblame at [count]th parent (like HEAD^[count])
 
                                                 *g:fugitive_dynamic_colors*
                         In the GUI or a 256 color terminal, commit hashes will
@@ -98,12 +98,6 @@ that are part of Git repositories).
                                                 *:Git_mergetool*
 :Git mergetool [args]   Like |:Git_difftool|, but target merge conflicts.
 
-Wrappers for Vim built-ins ~
-
-These all directly map onto a built-in Vim command, and generally have names
-that prepend "G" to the command they are wrapping.  For example, :Ggrep is G
-plus |:grep|.
-
                                                 *:Ggrep* *:Git_grep*
 :Ggrep[!] [args]        An approximation of |:grep|[!] with git-grep as
 :Git[!] grep -O [args]  'grepprg'.
@@ -119,12 +113,11 @@ plus |:grep|.
                                                  *:Gclog*
 :Gclog[!] [args]        Use git-log [args] to load the commit history into the
                         |quickfix| list.  Jumps to the first commit unless [!]
-                        is given.  This command wraps |:cfile|.
+                        is given.
 
                         The quickfix list can be awkward for many use cases
                         and exhibits extremely poor performance with larger
-                        data sets.  Consider using |:Git| log --oneline
+                        data sets.  Consider using |:Git| log instead.
-                        instead.
 
 :{range}Gclog[!] [args] Use git-log -L to load previous revisions of the given
                         range of the current file into the |quickfix| list.
@@ -220,13 +213,6 @@ plus |:grep|.
                         'diffopt'.  The split will still be vertical if
                         combined with |:vertical|.
 
-Other commands ~
-
-These do not directly correspond to any built-in Vim command, and have a
-capital letter after the "G" to convey this. For example, the file move
-operation has nothing to do with the |:move| built-in, so it is named :GMove,
-not :Gmove.
-
                                                 *:GMove*
 :GMove {destination}    Wrapper around git-mv that renames the buffer
                         afterward.  Add a ! to pass -f.
@@ -241,9 +227,8 @@ not :Gmove.
                         passed.  Add a ! to pass -f and forcefully discard the
                         buffer.
 
-                                                *:GRemove* *:GUnlink*
+                                                *:GRemove*
 :GRemove                Like |:GDelete|, but keep the (now empty) buffer around.
-:GUnlink
 
                                                 *:GBrowse*
 :GBrowse                Open the current file, blob, tree, commit, or tag

plugin/fugitive.vim

@@ -1,6 +1,6 @@
 " fugitive.vim - A Git wrapper so awesome, it should be illegal
 " Maintainer:   Tim Pope <http://tpo.pe/>
-" Version:      3.7
+" Version:      3.4
 " GetLatestVimScripts: 2975 1 :AutoInstall: fugitive.vim
 
 if exists('g:loaded_fugitive')
@@ -25,14 +25,14 @@ function! FugitiveGitDir(...) abort
     let dir = get(b:, 'git_dir', '')
     if empty(dir) && (empty(bufname('')) || &buftype =~# '^\%(nofile\|acwrite\|quickfix\|terminal\|prompt\)$')
       return FugitiveExtractGitDir(getcwd())
-    elseif (!exists('b:git_dir') || b:git_dir =~# s:bad_git_dir) && &buftype =~# '^\%(nowrite\)\=$'
+    elseif (!exists('b:git_dir') || b:git_dir =~# s:bad_git_dir) && empty(&buftype)
-      let b:git_dir = FugitiveExtractGitDir(bufnr(''))
+      let b:git_dir = FugitiveExtractGitDir(expand('%:p'))
       return b:git_dir
     endif
     return dir =~# s:bad_git_dir ? '' : dir
   elseif type(a:1) == type(0) && a:1 isnot# 0
-    if a:1 == bufnr('') && (!exists('b:git_dir') || b:git_dir =~# s:bad_git_dir) && &buftype =~# '^\%(nowrite\)\=$'
+    if a:1 == bufnr('') && (!exists('b:git_dir') || b:git_dir =~# s:bad_git_dir) && empty(&buftype)
-      let b:git_dir = FugitiveExtractGitDir(a:1)
+      let b:git_dir = FugitiveExtractGitDir(expand('%:p'))
     endif
     let dir = getbufvar(a:1, 'git_dir')
     return dir =~# s:bad_git_dir ? '' : dir
@@ -58,7 +58,7 @@ function! FugitiveReal(...) abort
   if type(file) ==# type({})
     let dir = FugitiveGitDir(file)
     let tree = s:Tree(dir)
-    return s:VimSlash(empty(tree) ? dir : tree)
+    return FugitiveVimPath(empty(tree) ? dir : tree)
   elseif file =~# '^\a\a\+:' || a:0 > 1
     return call('fugitive#Real', [file] + a:000[1:-1])
   elseif file =~# '^/\|^\a:\|^$'
@@ -88,12 +88,12 @@ endfunction
 " the inverse of FugitiveFind().
 function! FugitiveParse(...) abort
   let path = s:Slash(a:0 ? a:1 : @%)
-  if path !~# '^fugitive://'
+  if path !~# '^fugitive:'
     return ['', '']
   endif
-  let vals = matchlist(path, s:dir_commit_file)
+  let vals = matchlist(path, '\c^fugitive:\%(//\)\=\(.\{-\}\)\%(//\|::\)\(\x\{40,\}\|[0-3]\)\(/.*\)\=$')
   if len(vals)
-    return [(vals[2] =~# '^.\=$' ? ':' : '') . vals[2] . substitute(vals[3], '^/', ':', ''), vals[1]]
+    return [(vals[2] =~# '^.$' ? ':' : '') . vals[2] . substitute(vals[3], '^/', ':', ''), vals[1]]
   endif
   let v:errmsg = 'fugitive: invalid Fugitive URL ' . path
   throw v:errmsg
@@ -210,24 +210,6 @@ function! FugitiveRemoteUrl(...) abort
   return call('fugitive#RemoteUrl', a:000)
 endfunction
 
-" FugitiveRemote() returns a data structure parsed from the remote URL.
-" For example, for remote URL "https://me@example.com:1234/repo.git", the
-" returned dictionary will contain the following:
-"
-" * "scheme": "https"
-" * "authority": "user@example.com:1234"
-" * "path": "/repo.git" (for SSH URLs this may be a relative path)
-" * "pathname": "/repo.git" (always coerced to absolute path)
-" * "host": "example.com:1234"
-" * "hostname": "example.com"
-" * "port": "1234"
-" * "user": "me"
-" * "path": "/repo.git"
-" * "url": "https://me@example.com:1234/repo.git"
-function! FugitiveRemote(...) abort
-  return call('fugitive#Remote', a:000)
-endfunction
-
 " FugitiveDidChange() triggers a FugitiveChanged event and reloads the summary
 " buffer for the current or given buffer number's repository.  You can also
 " give the result of a FugitiveExecute() and that context will be made
@@ -283,32 +265,12 @@ function! FugitiveStatusline(...) abort
   return fugitive#Statusline()
 endfunction
 
-function! FugitiveActualDir(...) abort
-  return call('FugitiveGitDir', a:000)
-endfunction
-
-let s:commondirs = {}
 function! FugitiveCommonDir(...) abort
-  let dir = call('FugitiveActualDir', a:000)
+  let dir = FugitiveGitDir(a:0 ? a:1 : -1)
   if empty(dir)
     return ''
   endif
-  if has_key(s:commondirs, dir)
+  return fugitive#Find('.git/refs/..', dir)
-    return s:commondirs[dir]
-  endif
-  if getfsize(dir . '/HEAD') >= 10
-    let cdir = get(s:ReadFile(dir . '/commondir', 1), 0, '')
-    if cdir =~# '^/\|^\a:/'
-      let s:commondirs[dir] = s:Slash(FugitiveVimPath(cdir))
-    elseif len(cdir)
-      let s:commondirs[dir] = simplify(dir . '/' . cdir)
-    else
-      let s:commondirs[dir] = dir
-    endif
-  else
-    let s:commondirs[dir] = dir
-  endif
-  return s:commondirs[dir]
 endfunction
 
 function! FugitiveWorkTree(...) abort
@@ -330,17 +292,6 @@ function! FugitiveIsGitDir(...) abort
         \ getftype(path.'commondir') ==# 'file')
 endfunction
 
-function! s:ReadFile(path, line_count) abort
-  if v:version < 800 && !filereadable(a:path)
-    return []
-  endif
-  try
-    return readfile(a:path, 'b', a:line_count)
-  catch
-    return []
-  endtry
-endfunction
-
 let s:worktree_for_dir = {}
 let s:dir_for_worktree = {}
 function! s:Tree(path) abort
@@ -352,32 +303,23 @@ function! s:Tree(path) abort
   endif
   if !has_key(s:worktree_for_dir, dir)
     let s:worktree_for_dir[dir] = ''
-    let ext_wtc_pat = 'v:val =~# "^\\s*worktreeConfig *= *\\%(true\\|yes\\|on\\|1\\) *$"'
+    let config_file = dir . '/config'
-    let config = s:ReadFile(dir . '/config', 50)
+    if filereadable(config_file)
-    if len(config)
+      let config = readfile(config_file,'',10)
-      let ext_wtc_config = filter(copy(config), ext_wtc_pat)
+      let wt_config = filter(copy(config),'v:val =~# "^\\s*worktree *="')
-      if len(ext_wtc_config) == 1 && filereadable(dir . '/config.worktree')
+      if len(wt_config) == 1
-         let config += s:ReadFile(dir . '/config.worktree', 50)
-      endif
-    else
-      let worktree = fnamemodify(FugitiveVimPath(get(s:ReadFile(dir . '/gitdir', 1), '0', '')), ':h')
-      if worktree ==# '.'
-        unlet! worktree
-      endif
-      if len(filter(s:ReadFile(FugitiveCommonDir(dir) . '/config', 50), ext_wtc_pat))
-        let config = s:ReadFile(dir . '/config.worktree', 50)
-      endif
-    endif
-    if len(config)
-      let wt_config = filter(copy(config), 'v:val =~# "^\\s*worktree *="')
-      if len(wt_config)
         let worktree = FugitiveVimPath(matchstr(wt_config[0], '= *\zs.*'))
-      elseif !exists('worktree')
+      else
-        call filter(config,'v:val =~# "^\\s*bare *= *true *$"')
+        call filter(config,'v:val =~# "^\\s*bare *= *false *$"')
-        if empty(config)
+        if len(config)
           let s:worktree_for_dir[dir] = 0
         endif
       endif
+    elseif filereadable(dir . '/gitdir')
+      let worktree = fnamemodify(FugitiveVimPath(readfile(dir . '/gitdir')[0]), ':h')
+      if worktree ==# '.'
+        unlet! worktree
+      endif
     endif
     if exists('worktree')
       let s:worktree_for_dir[dir] = s:Slash(resolve(worktree))
@@ -399,39 +341,48 @@ function! s:CeilingDirectories() abort
       if empty(dir)
         let resolve = 0
       elseif resolve
-        call add(s:ceiling_directories, s:Slash(resolve(dir)))
+        call add(s:ceiling_directories, resolve(dir))
       else
-        call add(s:ceiling_directories, s:Slash(dir))
+        call add(s:ceiling_directories, dir)
       endif
     endfor
   endif
-  return s:ceiling_directories + get(g:, 'ceiling_directories', [s:Slash(fnamemodify(expand('~'), ':h'))])
+  return s:ceiling_directories + get(g:, 'ceiling_directories', [])
 endfunction
 
 function! FugitiveExtractGitDir(path) abort
   if type(a:path) ==# type({})
     return get(a:path, 'git_dir', '')
   elseif type(a:path) == type(0)
-    let path = s:Slash(a:path > 0 ? bufname(a:path) : bufname(''))
+    let path = s:Slash(a:path >= 0 ? bufname(a:path) : bufname(''))
   else
     let path = s:Slash(a:path)
   endif
-  if path =~# '^fugitive://'
+  if path =~# '^fugitive:'
-    return get(matchlist(path, s:dir_commit_file), 1, '')
+    return matchstr(path, '\C^fugitive:\%(//\)\=\zs.\{-\}\ze\%(//\|::\|$\)')
   elseif empty(path)
     return ''
+  elseif isdirectory(path)
+    let path = fnamemodify(path, ':p:s?/$??')
+  else
+    let path = fnamemodify(path, ':p:h:s?/$??')
   endif
   let pre = substitute(matchstr(path, '^\a\a\+\ze:'), '^.', '\u&', '')
   if len(pre) && exists('*' . pre . 'Real')
-    let path = {pre}Real(path)
+    let path = s:Slash({pre}Real(path))
+  endif
+  let root = resolve(path)
+  if root !=# path
+    silent! exe (haslocaldir() ? 'lcd' : exists(':tcd') && haslocaldir(-1) ? 'tcd' : 'cd') '.'
   endif
-  let root = s:Slash(fnamemodify(path, ':p:h'))
   let previous = ""
   let env_git_dir = len($GIT_DIR) ? s:Slash(simplify(fnamemodify(FugitiveVimPath($GIT_DIR), ':p:s?[\/]$??'))) : ''
   call s:Tree(env_git_dir)
-  let ceiling_directories = s:CeilingDirectories()
+  while root !=# previous
-  while root !=# previous && root !~# '^$\|^//[^/]*$'
+    if root =~# '\v^//%([^/]+/?)?$'
-    if index(ceiling_directories, root) >= 0
+      break
+    endif
+    if index(s:CeilingDirectories(), root) >= 0
       break
     endif
     if root ==# $GIT_WORK_TREE && FugitiveIsGitDir(env_git_dir)
@@ -445,10 +396,10 @@ function! FugitiveExtractGitDir(path) abort
       return dir
     elseif type ==# 'link' && FugitiveIsGitDir(dir)
       return resolve(dir)
-    elseif type !=# ''
+    elseif type !=# '' && filereadable(dir)
-      let line = get(s:ReadFile(dir, 1), 0, '')
+      let line = get(readfile(dir, '', 1), 0, '')
       let file_dir = s:Slash(FugitiveVimPath(matchstr(line, '^gitdir: \zs.*')))
-      if file_dir !~# '^/\|^\a:\|^$' && FugitiveIsGitDir(root . '/' . file_dir)
+      if file_dir !~# '^/\|^\a:' && FugitiveIsGitDir(root . '/' . file_dir)
         return simplify(root . '/' . file_dir)
       elseif len(file_dir) && FugitiveIsGitDir(file_dir)
         return file_dir
@@ -494,54 +445,32 @@ function! FugitiveDetect(...) abort
   return ''
 endfunction
 
+function! FugitiveVimPath(path) abort
+  if exists('+shellslash') && !&shellslash
+    return tr(a:path, '/', '\')
+  else
+    return a:path
+  endif
+endfunction
+
 function! FugitiveGitPath(path) abort
   return s:Slash(a:path)
 endfunction
 
 if exists('+shellslash')
-
-  let s:dir_commit_file = '\c^fugitive://\%(/\a\@=\)\=\(.\{-\}\)//\%(\(\x\{40,\}\|[0-3]\)\(/.*\)\=\)\=$'
-
   function! s:Slash(path) abort
     return tr(a:path, '\', '/')
   endfunction
-
-  function! s:VimSlash(path) abort
-    return tr(a:path, '\/', &shellslash ? '//' : '\\')
-  endfunction
-
-  function FugitiveVimPath(path) abort
-    return tr(a:path, '\/', &shellslash ? '//' : '\\')
-  endfunction
-
 else
-
-  let s:dir_commit_file = '\c^fugitive://\(.\{-\}\)//\%(\(\x\{40,\}\|[0-3]\)\(/.*\)\=\)\=$'
-
   function! s:Slash(path) abort
     return a:path
   endfunction
-
-  function! s:VimSlash(path) abort
-    return a:path
-  endfunction
-
-  if has('win32unix') && filereadable('/git-bash.exe')
-    function! FugitiveVimPath(path) abort
-      return substitute(a:path, '^\(\a\):', '/\l\1', '')
-    endfunction
-  else
-    function! FugitiveVimPath(path) abort
-      return a:path
-    endfunction
-  endif
-
 endif
 
 function! s:ProjectionistDetect() abort
   let file = s:Slash(get(g:, 'projectionist_file', ''))
   let dir = FugitiveExtractGitDir(file)
-  let base = get(matchlist(file, s:dir_commit_file), 1, '')
+  let base = matchstr(file, '^fugitive://.\{-\}//\x\+')
   if empty(base)
     let base = s:Tree(dir)
   endif
@@ -624,44 +553,30 @@ exe 'command! -bar -bang -nargs=* -complete=customlist,fugitive#EditComplete Gwr
 exe 'command! -bar -bang -nargs=* -complete=customlist,fugitive#EditComplete Gwq    exe fugitive#WqCommand(   <line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
 
 exe 'command! -bar -bang -nargs=0 GRemove exe fugitive#RemoveCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
-exe 'command! -bar -bang -nargs=0 GUnlink exe fugitive#UnlinkCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
 exe 'command! -bar -bang -nargs=0 GDelete exe fugitive#DeleteCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
 exe 'command! -bar -bang -nargs=1 -complete=customlist,fugitive#CompleteObject GMove   exe fugitive#MoveCommand(  <line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
 exe 'command! -bar -bang -nargs=1 -complete=customlist,fugitive#RenameComplete GRename exe fugitive#RenameCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
-if exists(':Gremove') != 2 && get(g:, 'fugitive_legacy_commands', 0)
+if exists(':Gremove') != 2 && get(g:, 'fugitive_legacy_commands', 1)
   exe 'command! -bar -bang -nargs=0 Gremove exe fugitive#RemoveCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
         \ '|echohl WarningMSG|echomsg ":Gremove is deprecated in favor of :GRemove"|echohl NONE'
-elseif exists(':Gremove') != 2 && !exists('g:fugitive_legacy_commands')
-  exe 'command! -bar -bang -nargs=0 Gremove echoerr ":Gremove has been removed in favor of :GRemove"'
 endif
-if exists(':Gdelete') != 2 && get(g:, 'fugitive_legacy_commands', 0)
+if exists(':Gdelete') != 2 && get(g:, 'fugitive_legacy_commands', 1)
   exe 'command! -bar -bang -nargs=0 Gdelete exe fugitive#DeleteCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
         \ '|echohl WarningMSG|echomsg ":Gdelete is deprecated in favor of :GDelete"|echohl NONE'
-elseif exists(':Gdelete') != 2 && !exists('g:fugitive_legacy_commands')
-  exe 'command! -bar -bang -nargs=0 Gdelete echoerr ":Gremove has been removed in favor of :GRemove"'
 endif
-if exists(':Gmove') != 2 && get(g:, 'fugitive_legacy_commands', 0)
+if exists(':Gmove') != 2 && get(g:, 'fugitive_legacy_commands', 1)
   exe 'command! -bar -bang -nargs=1 -complete=customlist,fugitive#CompleteObject Gmove   exe fugitive#MoveCommand(  <line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
         \ '|echohl WarningMSG|echomsg ":Gmove is deprecated in favor of :GMove"|echohl NONE'
-elseif exists(':Gmove') != 2 && !exists('g:fugitive_legacy_commands')
-  exe 'command! -bar -bang -nargs=? -complete=customlist,fugitive#CompleteObject Gmove'
-        \ 'echoerr ":Gmove has been removed in favor of :GMove"'
 endif
-if exists(':Grename') != 2 && get(g:, 'fugitive_legacy_commands', 0)
+if exists(':Grename') != 2 && get(g:, 'fugitive_legacy_commands', 1)
   exe 'command! -bar -bang -nargs=1 -complete=customlist,fugitive#RenameComplete Grename exe fugitive#RenameCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
         \ '|echohl WarningMSG|echomsg ":Grename is deprecated in favor of :GRename"|echohl NONE'
-elseif exists(':Grename') != 2 && !exists('g:fugitive_legacy_commands')
-  exe 'command! -bar -bang -nargs=? -complete=customlist,fugitive#RenameComplete Grename'
-        \ 'echoerr ":Grename has been removed in favor of :GRename"'
 endif
 
 exe 'command! -bar -bang -range=-1 -nargs=* -complete=customlist,fugitive#CompleteObject GBrowse exe fugitive#BrowseCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
-if exists(':Gbrowse') != 2 && get(g:, 'fugitive_legacy_commands', 0)
+if exists(':Gbrowse') != 2 && get(g:, 'fugitive_legacy_commands', 1)
   exe 'command! -bar -bang -range=-1 -nargs=* -complete=customlist,fugitive#CompleteObject Gbrowse exe fugitive#BrowseCommand(<line1>, <count>, +"<range>", <bang>0, "<mods>", <q-args>)'
         \ '|if <bang>1|redraw!|endif|echohl WarningMSG|echomsg ":Gbrowse is deprecated in favor of :GBrowse"|echohl NONE'
-elseif exists(':Gbrowse') != 2 && !exists('g:fugitive_legacy_commands')
-  exe 'command! -bar -bang -range=-1 -nargs=* -complete=customlist,fugitive#CompleteObject Gbrowse'
-        \ 'echoerr ":Gbrowse has been removed in favor of :GBrowse"'
 endif
 
 if v:version < 703
@@ -688,9 +603,9 @@ let g:io_fugitive = {
 augroup fugitive
   autocmd!
 
-  autocmd BufNewFile,BufReadPost *  call FugitiveDetect(+expand('<abuf>'), 0)
+  autocmd BufNewFile,BufReadPost *
-  autocmd FileType           netrw  call FugitiveDetect(+expand('<abuf>'), 0)
+        \    call FugitiveDetect(expand('<amatch>:p'), 0)
-  autocmd BufFilePost            *  unlet! b:git_dir
+  autocmd FileType           netrw call FugitiveDetect(fnamemodify(get(b:, 'netrw_curdir', expand('<afile>:p')), ':p'), 1)
 
   autocmd FileType git
         \ call fugitive#MapCfile()
@@ -710,26 +625,26 @@ augroup fugitive
         \ endif |
         \ let b:undo_ftplugin = get(b:, 'undo_ftplugin', 'exe') . '|setl inex= inc='
 
-  autocmd BufReadCmd index{,.lock} nested
+  autocmd BufReadCmd index{,.lock}
         \ if FugitiveIsGitDir(expand('<amatch>:p:h')) |
         \   let b:git_dir = s:Slash(expand('<amatch>:p:h')) |
-        \   exe fugitive#BufReadStatus(v:cmdbang) |
+        \   exe fugitive#BufReadStatus() |
         \ elseif filereadable(expand('<amatch>')) |
         \   silent doautocmd BufReadPre |
-        \   keepalt noautocmd read <amatch> |
+        \   keepalt read <amatch> |
-        \   silent 1delete_ |
+        \   1delete_ |
         \   silent doautocmd BufReadPost |
         \ else |
         \   silent doautocmd BufNewFile |
         \ endif
 
-  autocmd BufReadCmd   fugitive://*//*       nested exe fugitive#BufReadCmd() |
+  autocmd BufReadCmd    fugitive://*//*             exe fugitive#BufReadCmd() |
         \ if &path =~# '^\.\%(,\|$\)' |
         \   let &l:path = substitute(&path, '^\.,\=', '', '') |
         \ endif
-  autocmd BufWriteCmd  fugitive://*//[0-3]/* nested exe fugitive#BufWriteCmd()
+  autocmd BufWriteCmd   fugitive://*//[0-3]/*       exe fugitive#BufWriteCmd()
-  autocmd FileReadCmd  fugitive://*//*       nested exe fugitive#FileReadCmd()
+  autocmd FileReadCmd   fugitive://*//*             exe fugitive#FileReadCmd()
-  autocmd FileWriteCmd fugitive://*//[0-3]/* nested exe fugitive#FileWriteCmd()
+  autocmd FileWriteCmd  fugitive://*//[0-3]/*       exe fugitive#FileWriteCmd()
   if exists('##SourceCmd')
     autocmd SourceCmd     fugitive://*//*    nested exe fugitive#SourceCmd()
   endif
@@ -763,12 +678,10 @@ function! s:Map(mode, lhs, rhs, flags) abort
       let head = substitute(head, '<[^<>]*>$\|.$', '', '')
     endwhile
   endif
-  if empty(mapcheck(head.tail, a:mode))
+  if flags !~# '<unique>' || empty(mapcheck(head.tail, a:mode))
     exe a:mode.'map' s:nowait flags head.tail a:rhs
   endif
 endfunction
 
 call s:Map('c', '<C-R><C-G>', 'fnameescape(fugitive#Object(@%))', '<expr>')
 call s:Map('n', 'y<C-G>', ':<C-U>call setreg(v:register, fugitive#Object(@%))<CR>', '<silent>')
-nmap <script><silent> <Plug>fugitive:y<C-G> :<C-U>call setreg(v:register, fugitive#Object(@%))<CR>
-nmap <script> <Plug>fugitive: <Nop>