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Use git --list-cmds= to complete subcommands

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For older Git versions, use the list of subcommands from when
--list-cmds= was first added, and subtract out "worktree" for Git
versions too old to have it.  This one simple conditional gives us
accurate completion for Git versions up to a decade old.

The option is described as "internal/experimental", so make sure the
exit status is successful, and filter out anything that looks like a
warning or deprecation notice.  In case of failure, use the commands
provided by --list-cmds= as of the date of this commit.

Closes https://github.com/tpope/vim-fugitive/pull/1629
This commit is contained in:
Tim Pope
2021-03-20 10:52:58 -04:00
parent 1999aef8cd
commit 58d2b25836
1 changed files with 28 additions and 2 deletions
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30
autoload/fugitive.vim
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@@ -2744,10 +2744,36 @@ function! s:ExecPath() abort
return s:exec_paths[g:fugitive_git_executable]
endfunction
let s:subcommands_before_2_5 = [
\ 'add', 'am', 'apply', 'archive', 'bisect', 'blame', 'branch', 'bundle',
\ 'checkout', 'cherry', 'cherry-pick', 'citool', 'clean', 'clone', 'commit', 'config',
\ 'describe', 'diff', 'difftool', 'fetch', 'format-patch', 'fsck',
\ 'gc', 'grep', 'gui', 'help', 'init', 'instaweb', 'log',
\ 'merge', 'mergetool', 'mv', 'notes', 'pull', 'push',
\ 'rebase', 'reflog', 'remote', 'repack', 'replace', 'request-pull', 'reset', 'revert', 'rm',
\ 'send-email', 'shortlog', 'show', 'show-branch', 'stash', 'stage', 'status', 'submodule',
\ 'tag', 'whatchanged',
\ ]
let s:path_subcommands = {}
function! s:CompletableSubcommands(dir) abort
let commands = []
for path in [s:ExecPath()] + split($PATH, has('win32') ? ';' : ':')
let c_exec_path = s:cpath(s:ExecPath())
if !has_key(s:path_subcommands, c_exec_path)
if fugitive#GitVersion(2, 18)
let [lines, exec_error] = s:LinesError(a:dir, '--list-cmds=list-mainporcelain,nohelpers,list-complete')
call filter(lines, 'v:val =~# "^\\S\\+$"')
if !exec_error && len(lines)
let s:path_subcommands[c_exec_path] = lines
else
let s:path_subcommands[c_exec_path] = s:subcommands_before_2_5 +
\ ['maintenance', 'prune', 'range-diff', 'restore', 'sparse-checkout', 'switch', 'worktree']
endif
else
let s:path_subcommands[c_exec_path] = s:subcommands_before_2_5 +
\ (fugitive#GitVersion(2, 5) ? ['worktree'] : [])
endif
endif
let commands = copy(s:path_subcommands[c_exec_path])
for path in split($PATH, has('win32') ? ';' : ':')
if path !~# '^/\|^\a:[\\/]'
continue
endif