Docker Hub/Cloud Automated Build post_push hook to tag Maven project images with their version

post_push

#!/bin/sh
# Mounts PWD (pom.xml must be at root) on lightest Maven image and extracts the project version
VERSION=`docker run -v $(pwd):/usr/src/app \
                    -w /usr/src/app \
                    maven:3.6.0-jdk-8-alpine mvn org.apache.maven.plugins:maven-help-plugin:3.1.0:evaluate -Dexpression=project.version \
                                                                                                           -q \
                                                                                                           -DforceStdout`
docker tag $IMAGE_NAME $DOCKER_REPO:$VERSION
docker push $DOCKER_REPO:$VERSION