use system command to find git root by default

Author: chemzqm

autoload/easygit.vim

@@ -20,11 +20,33 @@ function! easygit#gitdir(path, ...) abort
 endfunction
 
 function! s:FindGitdir(path)
-  let dir = finddir('.git', expand(a:path).';')
-  if empty(dir) | return '' | endif
-  return fnamemodify(dir, ':p:h')
+  if !empty($GIT_DIR) | return $GIT_DIR | endif
+  if get(g:, 'easygit_enable_root_rev_parse', 1)
+    let old_cwd = getcwd()
+    let cwd = fnamemodify(a:path, ':p:h')
+    execute 'lcd '.cwd
+    let root = system('git rev-parse --show-toplevel')
+    execute 'lcd '.old_cwd
+    if v:shell_error | return '' | endif
+    return substitute(root, '\r\?\n', '', '') . '/.git'
+  else
+    let dir = finddir('.git', expand(a:path).';')
+    if dir | return fnamemodify(dir, ':p:h') | endif
+    return ''
+  endif
+endfunction
+
+" If cwd inside current file git root, return cwd, otherwise return git root
+function! easygit#smartRoot(...)
+  let suspend = a:0 ? a:1 : 0
+  let gitdir = easygit#gitdir(expand('%'), suspend)
+  if empty(gitdir) | return '' | endif
+  let root = fnamemodify(gitdir, ':h')
+  let cwd = getcwd()
+  return cwd =~# '^' . root ? cwd : root
 endfunction
 
+
 " cd or lcd to base directory of current file's git root
 function! easygit#cd(local) abort
   let dir = easygit#gitdir(expand('%'))
@@ -575,16 +597,6 @@ function! easygit#listRemotes(...)
   return substitute(output, '\v(^|\n)\zs\s*', '', 'g')
 endfunction
 
-" If cwd inside current file git root, return cwd, otherwise return git root
-function! easygit#smartRoot(...)
-  let suspend = a:0 ? a:1 : 0
-  let gitdir = easygit#gitdir(expand('%'), suspend)
-  if empty(gitdir) | return '' | endif
-  let root = fnamemodify(gitdir, ':h')
-  let cwd = getcwd()
-  return cwd =~# '^' . root ? cwd : root
-endfunction
-
 function! easygit#revert(args)
   let root = easygit#smartRoot()
   if empty(root) | return | endif

doc/easygit.txt

@@ -12,8 +12,8 @@
        : :: ::    :   : :  :: : :       :      :: :: :   :       :    ~
                                      ~
 Author		: Qiming Zhao <[email protected]>
-Version		: 0.5.1
-Last Change	: Jun 14, 2017
+Version		: 0.6.0
+Last Change	: Apr 02, 2018
 
 License : MIT license {{{
 
@@ -222,6 +222,11 @@ with golbal variables.
 
 ------------------------------------------------------------------------------
 
+*g:easygit_enable_root_rev_parse*
+
+	Use `git rev-parse --show-toplevel` to find git root instead of find
+	`.git` directory, it's slower.
+
 *g:easygit_enable_command*
 	Commands are disabled by default to make it works with |fugitive|
 	without any effort.  To enable the commands of easygit, use: >
@@ -377,6 +382,12 @@ easygit#grep({args})					*easygit#grep*
 ==============================================================================
 CHANGELOG				*easygit-changelog*
 
+0.6.0   2018-04-02
+	
+	- Use $GIT_DIR or `git rev-parse --show-toplevel` to find git root
+	  directory by default.
+
+
 0.5.1   2017-06-14
 
 	- add easygit#diffPreview function