post-merge.sh

#!/bin/bash

cd $1
tag_repo() {
        git tag -a "$1" -m "$2"
}

push_tag() {
        git ls-remote -q --exit-code $1
        if [[ $? == 0 ]]; then
                git push $1 --tags
                echo "New Release tagged and pushed to remote $1."
        else
                echo "Remote $1 does not exist"
        fi
}

CURRENT_DATE=`date +"%Y-%m-%d"`
CURRENT_VERSION=`mvn help:evaluate -Dexpression=project.version -q -DforceStdout`
CURRENT_REMOTE=`git for-each-ref --format='%(upstream:remotename)' $(git symbolic-ref -q HEAD)`
REFLOG_MESSAGE=`git log -1 --pretty=%B`

TAG_NAME=${CURRENT_VERSION}-${CURRENT_DATE}
echo "Tagging $TAG_NAME with last commit message $REFLOG_MESSAGE"

CHECK_TAG=`git tag -l $TAG_NAME`
# checking tag if exists

if [ $(git tag -l "$TAG_NAME") ]; then
        echo "Deleting exising tag $TAG_NAME"
        git push -d $CURRENT_REMOTE $TAG_NAME
        git tag -d $TAG_NAME
else
        echo "Creating new tag $TAG_NAME"
fi

tag_repo $TAG_NAME $REFLOG_MESSAGE
push_tag $CURRENT_REMOTE