1 files changed, 59 insertions, 0 deletions
diff --git a/base/vim/autoload/gitbranch.vim b/base/vim/autoload/gitbranch.vim
new file mode 100644
index 0000000..58f6dd8
--- /dev/null
+++ b/base/vim/autoload/gitbranch.vim
@@ -0,0 +1,59 @@
+" =============================================================================
+" Filename: autoload/gitbranch.vim
+" Author: itchyny
+" License: MIT License
+" Last Change: 2015/02/26 00:34:03.
+" =============================================================================
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! gitbranch#name() abort
+  if get(b:, 'gitbranch_pwd', '') !=# expand('%:p:h') || !has_key(b:, 'gitbranch_path')
+    call gitbranch#detect(expand('%:p:h'))
+  endif
+  if has_key(b:, 'gitbranch_path') && filereadable(b:gitbranch_path)
+    let branch = get(readfile(b:gitbranch_path), 0, '')
+    if branch =~# '^ref: '
+      return substitute(branch, '^ref: \%(refs/\%(heads/\|remotes/\|tags/\)\=\)\=', '', '')
+    elseif branch =~# '^\x\{20\}'
+      return branch[:6]
+    endif
+  endif
+  return ''
+endfunction
+
+function! gitbranch#dir(path) abort
+  let path = a:path
+  let prev = ''
+  while path !=# prev
+    let dir = path . '/.git'
+    let type = getftype(dir)
+    if type ==# 'dir' && isdirectory(dir.'/objects') && isdirectory(dir.'/refs') && getfsize(dir.'/HEAD') > 10
+      return dir
+    elseif type ==# 'file'
+      let reldir = get(readfile(dir), 0, '')
+      if reldir =~# '^gitdir: '
+        return simplify(path . '/' . reldir[8:])
+      endif
+    endif
+    let prev = path
+    let path = fnamemodify(path, ':h')
+  endwhile
+  return ''
+endfunction
+
+function! gitbranch#detect(path) abort
+  unlet! b:gitbranch_path
+  let b:gitbranch_pwd = expand('%:p:h')
+  let dir = gitbranch#dir(a:path)
+  if dir !=# ''
+    let path = dir . '/HEAD'
+    if filereadable(path)
+      let b:gitbranch_path = path
+    endif
+  endif
+endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo