From fd44dfd03f46eea40975b96375c3f392f191dd27 Mon Sep 17 00:00:00 2001
From: David Aguilar <davvid@gmail.com>
Date: Sun, 1 Apr 2012 20:30:24 -0700
Subject: [PATCH] lib/git.zsh: Speed-up git_prompt_ahead()

Use the `git rev-list` plumbing instead of `git log`, which
allows us to do without grep.

Limit the history to one commit as well.
---
 lib/git.zsh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/git.zsh b/lib/git.zsh
index 148695643..444b30f3d 100644
--- a/lib/git.zsh
+++ b/lib/git.zsh
@@ -57,7 +57,7 @@ git_remote_status() {
 
 # Checks if there are commits ahead from remote
 function git_prompt_ahead() {
-  if $(echo "$(git log origin/$(current_branch)..HEAD 2> /dev/null)" | grep '^commit' &> /dev/null); then
+  if [[ -n $(git rev-list -1 origin/$(current_branch)..HEAD 2>/dev/null) ]]; then
     echo "$ZSH_THEME_GIT_PROMPT_AHEAD"
   fi
 }