#!/usr/bin/env bash

# ***************************************************************************************

# Licensed 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 tag management script.

#

# This script can be used to tag a gatb-core release. When a tag is added, it is

# automatically pushed to the remote server.

#

# Usage:

# use option -h

#

# Author: Patrick Durand, Inria

# Created: December 2015

#*****************************************************************************************

# --------

# FUNCTION: print a spacer

function printspacer(){

sname=$0 ; length=${#sname} ; ((length+=2))

for ((i=0;i<length;i++)); do

printf " "

done

}

# --------

# FUNCTION: display help message

function help(){

printf "\n$0: a tool to handle git release tag creation using canonical \n"

printspacer

printf "numbering including major, minor and patch numbers.\n\n"

printf "usage: $0 [-h] [-D] [-t <message>] -M <major> -m <minor> -p <patch>\n"

printf "\n"

printf " -t <message> : new tag message (optional). Default message: 'new release'.\n"

printf " -M <tag> : major release number.\n"

printf " -m <tag> : minor release number.\n"

printf " -p <tag> : patch number.\n"

printf " -D : delete existing tag.\n"

printf " -h : this message.\n"

printf "\n"

printf "Using values from '-M A', '-m B' and '-p C' arguments, the script creates a tag\n"

printf "named 'vA.B.C' (without quotes). The tag is automatically pushed to the remote\n"

printf "server.\n"

printf "\n"

printf "Return value is one of:\n"

printf " 0: ok\n"

printf " 1: missing mandatory argument\n"

printf " 2: tag version already exists\n"

printf " 3: failed to create tag version\n"

printf " 4: failed to push tag to remote repository\n"

printf " 5: failed to delete tag\n"

exit 0

}

# Some variables

release_msg=""

curTag=""

MAJOR=""

MINOR=

PATCH=

TAG=""

OUT=""

CMD=""

# Prepare arguments for processing

while getopts hDM:m:p:t: opt

do

case "$opt" in

M) MAJOR="$OPTARG";;

m) MINOR="$OPTARG";;

p) PATCH="$OPTARG";;

t) CREATE_MESSAGE="$OPTARG";;

D) CMD="delete";;

h) help;;

\?) help;;

esac

done

shift `expr $OPTIND - 1`

#Do we have all mandatory arguments ?

mandatory_params=( "-M" "-m" "-p" )

mandatory_values=( "$MAJOR" "$MINOR" "$PATCH" )

for ((i=0;i<${#mandatory_params[@]};++i)); do

if [ -z "${mandatory_values[i]}" ]; then

printf "/!\ Missing mandatory argument: ${mandatory_params[i]}\n" >&2

printf " use option -h to get help.\n" >&2

exit 1

fi

done

# Prepare tag

TAG=$(echo "v${MAJOR}.${MINOR}.${PATCH}")

# Check whether provided tag already exists on repository

curTag=`git tag -l $TAG`

if [ ! -z "$curTag" ]; then

#if tag exists and we do not want to delete it: error

if [ ! "$CMD" == "delete" ]; then

printf "/!\ git tag '$TAG' already exist.\n" >&2

exit 2

fi

#delete tag from local repository...

git tag --delete $curTag

#... then from remote repository

git push --delete origin $curTag

exit 0

fi

#do we have to delete tag?

if [ "$CMD" == "delete" ]; then

printf "/!\ git tag '$TAG' does not exist: nothing to delete.\n" >&2

exit 5

fi

# Prepare message

if [ ! -z "$CREATE_MESSAGE" ]; then

release_msg=$CREATE_MESSAGE

else

release_msg="new release"

fi

# Create tag on local repository and check if it's ok

printf "Tagging git repository with \n"

printf " tag: $TAG\n"

printf " msg: $release_msg\n"

git tag -m "$release_msg" $TAG

OUT=$?

if [ $OUT -eq 0 ];then

printf "git tag '$TAG' created.\n"

else

printf "/!\ unable to create git tag '$TAG'.\n" >&2

exit 3

fi

# Push tag to the remote server and check if it's ok

git push origin $TAG

OUT=$?

if [ $OUT -eq 0 ];then

printf "git tag '$TAG' pushed to remote repository.\n"

exit 0

else

printf "/!\ git tag '$TAG' not pushed to remote repository.\n" >&2

exit 4

fi