#!/bin/sh
#####################################################################
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#####################################################################
set -e

# this script requires a posix shell; namely, $(( math evaluation.

help() {
	cat << _EOF_
$0 [options]

mergefromtrunk.sh merge \$rev		Apply revision \$rev from trunk.
mergefromtrunk.sh test			Run test suite(clean-all, load-demo, run-tests).
mergefromtrunk.sh commit		Commit current fix to svn.
mergefromtrunk.sh abort			Abort current merge session.

-h | --help		Show this help.
_EOF_
}

cmd=""
rev=""
while [ $# -gt 0 ]; do
	case "$1" in
		(-h|--help)
			help
			exit 0
			;;
		(-*)
			echo "Unknown arg ($1)." 1>&2
			help 1>&2
			exit 1
			;;
		(*)
			if [ z = "z$cmd" ]; then
				cmd="$1"
			else
				case "$cmd" in
					(merge)
						rev="$1"
						;;
					(*)
						echo "Too many arguments." 1>&2
						help 1>&2
						exit 1
						;;
				esac
			fi
			;;
	esac
	shift
done
case "$cmd" in
	(merge)
		if [ z = "z$rev" ]; then
			echo "Need a revision." 1>&2
			help 1>&2
			exit 1
		fi
		if [ -d runtime/merge-state ]; then
			echo "Merge session already started." 1>&2
			help 1>&2
			exit 1
		fi
		mkdir -p runtime/merge-state
		echo "$rev" > runtime/merge-state/revision
		# do not run any of the following commands in a complex
		# chained pipe; if one of the commands in the pipe fails,
		# it isn't possible to detect the failure.
		printf "Applied fix from trunk for revision: %s \n===\n\n" "$rev" > runtime/merge-state/log-message
		svn log https://svn.apache.org/repos/asf/ofbiz/trunk -r "$rev" > runtime/merge-state/log.txt
		set -- $(wc -l runtime/merge-state/log.txt)
		head -n $(($1 - 1)) < runtime/merge-state/log.txt > runtime/merge-state/log.txt.head
		tail -n $(($1 - 4)) < runtime/merge-state/log.txt.head >> runtime/merge-state/log-message
		prevRev=$(($rev - 1))
		svn up
		svn merge -r "$prevRev:$rev" https://svn.apache.org/repos/asf/ofbiz/trunk 
		;;
	(test)
		./ant clean-all
		./ant load-demo
		./ant run-tests
		;;
	(commit)
		svn commit -F runtime/merge-state/log-message
		rm -rf runtime/merge-state
		;;
	(abort)
		svn resolved . -R
		svn revert . -R
		rm -rf runtime/merge-state
		;;
	("")
		echo "Need a command and a revision." 1>&2
		help 1>&2
		exit 1
		;;
	(*)
		echo "Unknown command($cmd)." 1>&2
		help 1>&2
		exit 1
		;;
esac