From 71201ffd67da9bb8a60d998ebce4dfe7e1039c98 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Cornell=C3=A0?= <marc.cornella@live.com>
Date: Mon, 5 Sep 2016 11:22:48 +0200
Subject: [PATCH] git: output nothing when no commits ahead or behind

This fixes old git_commits_ahead behavior and changes git_commits_behind
to have the same behavior.

Fixes #5355
---
 lib/git.zsh | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/lib/git.zsh b/lib/git.zsh
index 648a766b5..b9069ff12 100644
--- a/lib/git.zsh
+++ b/lib/git.zsh
@@ -76,16 +76,21 @@ function git_current_branch() {
 
 # Gets the number of commits ahead from remote
 function git_commits_ahead() {
-  if $(command git rev-parse --git-dir > /dev/null 2>&1); then
-    local COMMITS="$(git rev-list --count @{upstream}..HEAD)"
-    echo "$ZSH_THEME_GIT_COMMITS_AHEAD_PREFIX$COMMITS$ZSH_THEME_GIT_COMMITS_AHEAD_SUFFIX"
+  if command git rev-parse --git-dir &>/dev/null; then
+    local commits="$(git rev-list --count @{upstream}..HEAD)"
+    if [[ "$commits" != 0 ]]; then
+      echo "$ZSH_THEME_GIT_COMMITS_AHEAD_PREFIX$commits$ZSH_THEME_GIT_COMMITS_AHEAD_SUFFIX"
+    fi
   fi
 }
 
 # Gets the number of commits behind remote
 function git_commits_behind() {
-  if $(command git rev-parse --git-dir > /dev/null 2>&1); then
-    echo $(git rev-list --count HEAD..@{upstream})
+  if command git rev-parse --git-dir &>/dev/null; then
+    local commits="$(git rev-list --count HEAD..@{upstream})"
+    if [[ "$commits" != 0 ]]; then
+      echo "$ZSH_THEME_GIT_COMMITS_BEHIND_PREFIX$commits$ZSH_THEME_GIT_COMMITS_BEHIND_SUFFIX"
+    fi
   fi
 }