#!/usr/bin/env bash
# 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.

##############################################################
# This script is create release branch
##############################################################

RELEASE_VERSION=${RELEASE_VERSION}

if [ -z "${RELEASE_VERSION}" ]; then
    echo "RELEASE_VERSION was not set"
    exit 1
fi

# fail immediately
set -o errexit
set -o nounset

CURR_DIR=`pwd`
BASE_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"
PROJECT_ROOT="${BASE_DIR}/../../"

# Sanity check to ensure that resolved paths are valid; a LICENSE file should aways exist in project root
if [ ! -f ${PROJECT_ROOT}/LICENSE.txt ]; then
    echo "Project root path ${PROJECT_ROOT} is not valid; script may be in the wrong directory."
    exit 1
fi

TARGET_BRANCH=release-${RELEASE_VERSION}

cd ${PROJECT_ROOT}
git checkout -b ${TARGET_BRANCH}

RELEASE_COMMIT_HASH=`git rev-parse HEAD`
echo "Created a new release branch ${TARGET_BRANCH} with commit hash ${RELEASE_COMMIT_HASH}."

cd ${CURR_DIR}