init async global variables

autoload/airline/extensions/branch.vim

@@ -6,7 +6,7 @@ scriptencoding utf-8
 let s:has_fugitive = exists('*fugitive#head')
 let s:has_lawrencium = exists('*lawrencium#statusline')
 let s:has_vcscommand = get(g:, 'airline#extensions#branch#use_vcscommand', 0) && exists('*VCSCommandGetStatusLine')
-let s:has_async = v:version >= 800 && has('job')
+let s:has_async = airline#util#async
 let s:git_cmd = 'git status --porcelain -- '
 let s:hg_cmd  = 'hg status -u -- '
 
@@ -121,13 +121,15 @@ if s:has_async
     let untracked = get(g:, 'airline#extensions#branch#notexists', g:airline_symbols.notexists)
     if empty(self.buf)
       let s:untracked_{self.cmd}[self.file] = ''
-    else
+    elseif (self.buf[0:1] is# '??' && self.cmd is# 'git') || (self.buf[0] is# '?' && self.cmd is# 'hg')
       let s:untracked_{self.cmd}[self.file] = untracked
+    else
+      let s:untracked_{self.cmd}[self.file] = ''
     endif
   endfunction
 
   function! s:DoAsync(cmd, file)
-    if (has('win32') || has('win64')) && &shell =~ 'cmd'
+    if g:airline#util#is_windows && &shell =~ 'cmd'
       let cmd = a:cmd. shellescape(a:file)
     else
       let cmd = ['sh', '-c', a:cmd. shellescape(a:file)]
@@ -276,5 +278,4 @@ function! airline#extensions#branch#init(ext)
   autocmd User AirlineBeforeRefresh unlet! b:airline_head
   autocmd BufWritePost * call s:reset_untracked_cache(0)
   autocmd ShellCmdPost * call s:reset_untracked_cache(1)
-
 endfunction

autoload/airline/init.vim

@@ -32,6 +32,9 @@ function! airline#init#bootstrap()
   call s:check_defined('g:airline_exclude_preview', 0)
   call s:check_defined('g:airline_gui_mode', airline#init#gui_mode())
 
+  let g:airline#util#async = v:version >= 800 && has('job')
+  let g:airline#util#is_windows = has('win32') || has('win64')
+
   call s:check_defined('g:airline_mode_map', {})
   call extend(g:airline_mode_map, {
         \ '__' : '------',
@@ -147,4 +150,3 @@ function! airline#init#sections()
     let g:airline_section_warning = airline#section#create(['ycm_warning_count',  'neomake_warning_count', 'whitespace'])
   endif
 endfunction
-

autoload/airline/util.vim

@@ -77,4 +77,3 @@ else
     return 0
   endfunction
 endif
-