From 7e563f9c74d35ed325cb4468502b730f3bf0b753 Mon Sep 17 00:00:00 2001
From: Bailey Ling <bling@live.ca>
Date: Sun, 18 Aug 2013 18:34:02 +0000
Subject: [PATCH] detect branch when changing directories. resolves #138.

---
 autoload/airline/extensions/branch.vim | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/autoload/airline/extensions/branch.vim b/autoload/airline/extensions/branch.vim
index 6daa406b..1389fb3b 100644
--- a/autoload/airline/extensions/branch.vim
+++ b/autoload/airline/extensions/branch.vim
@@ -1,15 +1,24 @@
-" MIT license. Copyright (c) 2013 Bailey Ling.
-" vim: ts=2 sts=2 sw=2 fdm=indent
+" MIT License. Copyright (c) 2013 Bailey Ling.
+" vim: et ts=2 sts=2 sw=2
+
+let s:has_fugitive = exists('*fugitive#head')
+let s:has_fugitive_detect = exists('*fugitive#detect')
+let s:has_lawrencium = exists('*lawrencium#statusline')
 
 function! airline#extensions#branch#get_head()
   let head = ''
 
-  if exists('*fugitive#head')
+  if s:has_fugitive && !exists('b:mercurial_dir')
     let head = fugitive#head()
+
+    if empty(head) && s:has_fugitive_detect && !exists('b:git_dir')
+      call fugitive#detect(getcwd())
+      let head = fugitive#head()
+    endif
   endif
 
   if empty(head)
-    if exists('*lawrencium#statusline')
+    if s:has_lawrencium
       let head = lawrencium#statusline()
     endif
   endif