re-enable gitgutter integration with new upstream function. resolves #154 and #153.

autoload/airline/extensions.vim

@@ -128,7 +128,7 @@ function! airline#extensions#load()
     call airline#extensions#undotree#init(s:ext)
   endif
 
-  if g:airline_enable_hunks && exists('*GitGutterGetHunks')
+  if get(g:, 'airline_enable_hunks', 1) && exists('*GitGutterGetHunkSummary')
     call airline#extensions#hunks#init(s:ext)
   endif
 

autoload/airline/extensions/hunks.vim

@@ -2,35 +2,8 @@
 " vim: et ts=2 sts=2 sw=2
 
 function! airline#extensions#hunks#get_hunks()
-  if &ft == 'gitcommit'
-    return ''
-  endif
-
-  if get(g:, 'gitgutter_initialised', 0) && get(g:, 'gitgutter_enabled', 0)
-    let added = 0
-    let removed = 0
-    let changed = 0
-    let hunks = GitGutterGetHunks()
-    for hunk in hunks
-      if hunk[1] == 0 && hunk[3] > 0
-        let added += hunk[3]
-      elseif hunk[1] > 0 && hunk[3] == 0
-        let removed += hunk[1]
-      elseif hunk[1] > 0 && hunk[3] > 0
-        if hunk[1] == hunk[3]
-          let changed += hunk[3]
-        elseif hunk[1] < hunk[3]
-          let changed += hunk[1]
-          let added += (hunk[3] - hunk[1])
-        elseif hunk[1] > hunk[3]
-          let changed += hunk[3]
-          let removed += (hunk[1] - hunk[3])
-        endif
-      endif
-    endfor
-    return printf('+%s ~%s -%s ', added, changed, removed)
-  endif
-  return ''
+  let hunks = GitGutterGetHunkSummary()
+  return printf('+%s ~%s -%s ', hunks[0], hunks[1], hunks[2])
 endfunction
 
 function! airline#extensions#hunks#init(ext)

plugin/airline.vim

@@ -21,7 +21,6 @@ call s:check_defined('g:airline_enable_branch', 1)
 call s:check_defined('g:airline_enable_syntastic', 1)
 call s:check_defined('g:airline_enable_tagbar', 1)
 call s:check_defined('g:airline_enable_csv', 1)
-call s:check_defined('g:airline_enable_hunks', 0)
 call s:check_defined('g:airline_detect_iminsert', 0)
 call s:check_defined('g:airline_detect_modified', 1)
 call s:check_defined('g:airline_detect_paste', 1)