Release a branch from master + updating maven POM file version to new version for multi module project.

release.sh

#!/bin/bash

# current Git branch
branch=$(git symbolic-ref HEAD | sed -e 's,.*/\(.*\),\1,')

# current project name
projectName=$(git config --local remote.origin.url|sed -n 's#.*/\([^.]*\)\.git#\1#p')

# establish master branch name variables
masterBranch=$branch

# checkout to master branch, this will break if the user has uncommited changes
git checkout $masterBranch

# master branch validation
if [ $branch = "master" ]; then
	echo "Enter the release version number"

	read versionNumber

	# v1.0.0, v1.7.8, etc..
	versionLabel=v$versionNumber

	# establish branch and tag name variables
	releaseBranch=$versionNumber
	tagName=$versionLabel

	echo "Started releasing $versionLabel for $projectName ....."

	# pull the latest version of the code from master
	git pull

	# create empty commit from master branch
	git commit --allow-empty -m "Creating Branch $releaseBranch"

	# create tag for new version from -master
	git tag $tagName

	# push commit to remote origin
	git push

	# push tag to remote origin
	git push --tags origin 
	 
	# create the release branch from the -master branch
	git checkout -b $releaseBranch $masterBranch

	# push local releaseBranch to remote
	git push -u origin $releaseBranch

	echo "$versionLabel is successfully released for $projectName ...."
	echo "Checking out into $masterBranch again, where it all started...... :)"

	# checkout to master branch
	git checkout $masterBranch

	# pull the latest version of the code from master
	git pull

	echo "Enter new version number for $projectName"	
	read newVersionNumer

	# Update Maven version to next release number
	mvn versions:set -DnewVersion=$newVersionNumer -DgenerateBackupPoms=false
	
	# Commit setting new master branch version	
	git commit -a -m "Setting master branch version to $newVersionNumer"

	# push commit to remote origin
	git push
	
	echo "Maven POM File Version is set to new version $newVersionNumer"	
	echo "Bye!"
else 
	echo "Please make sure you are on master branch and come back!"
	echo "Bye!"
fi