add tag renaming script

renametag.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+#
+# Copyright 2014 Range Networks, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# See the COPYING file in the main directory for details.
+#
+
+sayAndDo () {
+	echo $@
+	eval $@
+	if [ $? -ne 0 ]; then
+		echo "# ERROR: command failed!"
+		exit 1
+	fi
+}
+
+usage () {
+	echo "# usage: ./renametag.sh component-directory (current-tag new-tag)"
+	exit 1
+}
+
+if [ -z "$1" ]; then
+	usage
+elif [ ! -d $1 ]; then
+	usage
+fi
+
+if [ -z "$2" ]; then
+	echo "# Here are the tags for that componet:"
+	cd $1
+	git tag
+	cd ..
+	read -r -p "# Which tag would you like to rename? " OLDTAG
+else
+	OLDTAG=$2
+fi
+
+if [ -z "$3" ]; then
+	read -r -p "# What should the new name be? " NEWTAG
+else
+	NEWTAG=$3
+fi
+
+read -r -p "# To rename tag $OLDTAG to $NEWTAG, answer \"yes\" " ANSWER
+if [ $ANSWER == "yes" ]; then
+	echo "# - renaming..."
+	cd $1
+	sayAndDo git tag $NEWTAG $OLDTAG
+	sayAndDo git tag -d $OLDTAG
+	sayAndDo git push origin :refs/tags/$OLDTAG
+	sayAndDo git push --tags
+else
+	echo "# - better safe than sorry, cancelling..."
+fi