#!/bin/sh
#
# Tags should only be allowed to point to commits that are within a branch.
#

. $(dirname $0)/functions

refname="$1"
oldrev="$2"
newrev="$3"

# Only interested in tags
case "$refname" in
	refs/tags/*)
		short_refname=${refname##refs/tags/}
		;;
	*)
		exit 0
		;;
esac

# Except if they're getting deleted
if [ "$newrev" == "0000000000000000000000000000000000000000" ] ; then
	exit 0
fi

contains=$(git branch --contains "$newrev" | wc -l)
if [ $contains -eq 0 ] ; then
	display_error_message "The tag $short_refname is not included in any branch."
	exit 1
fi