From 98a1820d39254e38c1771b9274f64c2790b0122e Mon Sep 17 00:00:00 2001
From: spacewander <spacewanderlzx@gmail.com>
Date: Sat, 8 Aug 2015 16:23:23 +0800
Subject: [PATCH] abort git-alias when too many arguments given.

Avoid incorrect usage probably because of the missing quotes, like "git
alias cm checkout master"
---
 bin/git-alias | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/bin/git-alias b/bin/git-alias
index 20f5a9f..fbc9d2e 100755
--- a/bin/git-alias
+++ b/bin/git-alias
@@ -1,7 +1,16 @@
 #!/usr/bin/env bash
 
+usage() {
+cat <<HERE
+usage: git alias                         # list all aliases
+   or: git alias <search-pattern>        # show aliases matching pattern
+   or: git alias <alias-name> <command>  # alias a command
+HERE
+}
+
 case $# in
   0) git config --get-regexp 'alias.*' | sed 's/^alias\.//' | sed 's/[ ]/ = /' | sort ;;
   1) git alias | grep -e "$1" ;;
-  *) git config --global alias."$1" "$2" ;;
+  2) git config --global alias."$1" "$2" ;;
+  *) >&2 echo "error: too many arguments." && usage && exit 1 ;;
 esac