#!/bin/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.
#

#
# Git patch-file maker.
#
echo 'Usage: scripts/git-format-patch.sh [-ih|--ignitehome <path>] [-idb|--ignitedefbranch <branch-name>] [-ph|--patchhome <path>]'
echo 'It is a script to create patch between Current branch (branch with changes) and Default branche. The script is safe and do not broke or lose your changes.'
echo "It should be called from IGNITE_HOME directory."
echo "Patch will be created at PATCHES_HOME (= IGNITE_HOME, by default) between Default branch (IGNITE_DEFAULT_BRANCH) and Current branch."
echo "Note: you can use ${IGNITE_HOME}/scripts/git-patch-prop-local.sh to set your own local properties (to rewrite settings at git-patch-prop-local.sh). "
echo 'Examples:'
echo '- Basic (with all defaults and properties from git-patch-prop.sh):  ./scripts/git-format-patch.sh'
echo '- Rewrite some defaults (see Usage):                                ./scripts/git-format-patch.sh -ph /home/user_name/patches'
echo

#
# Init home and import properties and functions.
#
if [ -z ${IGNITE_HOME} ] # Script can be called from not IGNITE_HOME if IGNITE_HOME was set.
    then IGNITE_HOME=$PWD
fi

. ${IGNITE_HOME}/scripts/git-patch-prop.sh # Import properties.
. ${IGNITE_HOME}/scripts/git-patch-functions.sh # Import patch functions.

if [ -f ${IGNITE_HOME}/scripts/git-patch-prop-local.sh ] # Whether a local user properties file exists.
    then . ${IGNITE_HOME}/scripts/git-patch-prop-local.sh # Import user properties (it will rewrite global properties).
fi

#
# Read command line params.
#
while [[ $# > 1 ]]
do
    key="$1"

    case $key in
        -ih|--ignitehome)
        IGNITE_HOME="$2"
        shift
        ;;

        -idb|--ignitedefbranch)
        IGNITE_DEFAULT_BRANCH="$2"
        shift
        ;;

        -ph|--patchhome)
        PATCHES_HOME="$2"
        shift
        ;;

        *)
        echo "Unknown parameter: ${key}"
        ;;
    esac
    shift
done

IGNITE_CURRENT_BRANCH=$( determineCurrentBranch ${IGNITE_HOME} )

echo "IGNITE_HOME    : ${IGNITE_HOME}"
echo "Default branch : ${IGNITE_DEFAULT_BRANCH}"
echo "Current branch : ${IGNITE_CURRENT_BRANCH}"
echo
echo "PATCHES_HOME   : ${PATCHES_HOME}"
echo

#
# Main script logic.
#

requireCleanWorkTree ${IGNITE_HOME}

formatPatch ${IGNITE_HOME} ${IGNITE_DEFAULT_BRANCH} ${IGNITE_CURRENT_BRANCH} .patch