From: Rudolf Polzer <divverent@xonotic.org>
Date: Wed, 27 Mar 2013 08:17:12 +0000 (+0100)
Subject: help message
X-Git-Url: https://git.xonotic.org/?p=xonotic%2Fdiv0-gittools.git;a=commitdiff_plain;h=ffc02d87b626995e8e24fd0703d6dcfef95c78c8;hp=8a57b4a8d797b7ae98de93fa87848631875597ff

help message
---

diff --git a/git-identify-revision b/git-identify-revision
index 64e9495..e71c259 100755
--- a/git-identify-revision
+++ b/git-identify-revision
@@ -4,16 +4,38 @@
 # arguments: git rev-list arguments
 # we now identify the one revision with least differences
 
+usage()
+{
+	echo "Usage: $0 [--cached] git-rev-list args..."
+	echo
+	echo "Example: $0 --all"
+	echo "Compares current work tree to all revisions, and identifies the"
+	echo "closest match."
+	echo
+	echo "Example: $0 --cached v1.0..HEAD"
+	echo "Compares current work tree to all revisions between v1.0 and HEAD,"
+	echo "and identifies the closest match."
+}
+
 case "$1" in
 	--cached)
 		use_worktree=false
 		shift
 		;;
+	--help|-h)
+		usage
+		exit 0
+		;;
 	*)
 		use_worktree=true
 		;;
 esac
 
+if [ $# = 0 ]; then
+	usage >&2
+	exit 1
+fi
+
 diffopts="-M -C"
 
 if $use_worktree; then