From 57ca6c9e782c1ca9b85150a386100c5af89894ac Mon Sep 17 00:00:00 2001
From: Christian Brabandt <cb@256bit.org>
Date: Wed, 28 Sep 2016 21:20:37 +0200
Subject: [PATCH] include workaround from c1704a2de0e3d963714a

add workaround from commit c1704a2de0e3d963714a to prevent overwriting
v:shell_error
---
 autoload/airline/extensions/branch.vim | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/autoload/airline/extensions/branch.vim b/autoload/airline/extensions/branch.vim
index a877c181..56a49666 100644
--- a/autoload/airline/extensions/branch.vim
+++ b/autoload/airline/extensions/branch.vim
@@ -248,7 +248,18 @@ function! s:check_in_path()
   return b:airline_file_in_root
 endfunction
 
-function! s:reset_untracked_cache()
+function! s:reset_untracked_cache(shellcmdpost)
+  if !s:has_async
+    if a:shellcmdpost
+      " function called after executing a shell command,
+      " only clear cache, if there was no error, else the
+      " system() command from get_git_untracked() would
+      " overwrite the v:shell_error status
+      if v:shell_error
+        return
+      endif
+    endif
+  endif
   if exists("s:untracked_git")
     let s:untracked_git={}
   endif
@@ -263,5 +274,7 @@ function! airline#extensions#branch#init(ext)
   autocmd BufReadPost * unlet! b:airline_file_in_root
   autocmd CursorHold,ShellCmdPost,CmdwinLeave * unlet! b:airline_head
   autocmd User AirlineBeforeRefresh unlet! b:airline_head
-  autocmd ShellCmdPost,BufWritePost * call s:reset_untracked_cache()
+  autocmd BufWritePost * call s:reset_untracked_cache(0)
+  autocmd ShellCmdPost * call s:reset_untracked_cache(1)
+
 endfunction