From cf9a16efad17a95334ebc731ebc2228ad05a0607 Mon Sep 17 00:00:00 2001
From: Michele Campeotto <mcampeotto@apple.com>
Date: Wed, 1 Aug 2012 14:47:55 -0700
Subject: [PATCH] added git_prompt_behind

use status for git_prompt_ahead instead of log
---
 lib/git.zsh | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/git.zsh b/lib/git.zsh
index d2cdde037..0193d2775 100644
--- a/lib/git.zsh
+++ b/lib/git.zsh
@@ -28,11 +28,19 @@ function parse_git_dirty() { git_parse_dirty }
 
 # Checks if there are commits ahead from remote
 function git_prompt_ahead() {
-  if $(echo "$(git log origin/$(git_current_branch)..HEAD 2> /dev/null)" | grep '^commit' &> /dev/null); then
+  if $(git status --porcelain --branch 2> /dev/null | grep '^## .*ahead' &> /dev/null); then
     echo "$ZSH_THEME_GIT_PROMPT_AHEAD"
   fi
 }
 
+# Checks if there are commits behind from remote
+function git_prompt_behind() {
+  if $(git status --porcelain --branch 2> /dev/null | grep '^## .*behind' &> /dev/null); then
+    echo $ZSH_THEME_GIT_PROMPT_BEHIND
+  fi
+}
+
+
 # Formats prompt string for current git commit short SHA
 function git_prompt_short_sha() {
   SHA=$(git rev-parse --short HEAD 2> /dev/null) && echo "$ZSH_THEME_GIT_PROMPT_SHA_BEFORE$SHA$ZSH_THEME_GIT_PROMPT_SHA_AFTER"