deployments/shareLibs/imageBuilder.groovy

def buildJar() {
    
    echo "-----> Building java package ..."
    dir("projdir"){
        sh '$MAVEN_HOME/bin/mvn clean package -Dmaven.test.skip=true'
    }
}

def buildImage(Object SERVICE, Object DOCKER, String base_branch, String module='') {
    echo "-----> Building docker image: ${DOCKER.registry}/${DOCKER.image}:$base_branch-$BUILD_NUMBER ..."
    dir("projdir") {
        sh """cat > Dockerfile<<EOF
FROM openjdk:8-alpine as final
ADD ${module}target/${SERVICE.jar} /app/target/${SERVICE.jar}
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-Xmx1024m","-Dserver.port=80","-jar","/app/target/${SERVICE.jar}", "--spring.config.location=file:/app/configs/application.yml"]
EOF
"""
        docker.withRegistry("http://${DOCKER.registry}", "${DOCKER.push_credentialId}") {
        def image = docker.build("${DOCKER.image}:$base_branch-$BUILD_NUMBER")
            image.push()
            sh "docker rmi ${DOCKER.image}:${base_branch}-${BUILD_NUMBER}"
            sh "docker rmi ${DOCKER.registry}/${DOCKER.image}:${base_branch}-${BUILD_NUMBER}"
        }
    }
}

def buildImage2(String jar, String registry, String docker_image, String registry_push_credentialId, String base_branch) {

    echo "-----> Building docker image: $registry/$docker_image:$base_branch-$BUILD_NUMBER ..."
    dir("projdir"){
        sh """cat > Dockerfile<<EOF
FROM openjdk:8-alpine as final
ADD target/${jar} /app/target/${jar}
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-Xmx1024m","-Dserver.port=80","-jar","/app/target/${jar}", "--spring.config.location=file:/app/configs/application.yml"]
EOF
"""
        docker.withRegistry("http://${registry}", "${registry_push_credentialId}") {
            def image = docker.build("$docker_image:$base_branch-$BUILD_NUMBER")
            image.push()
            sh "docker rmi ${docker_image}:${base_branch}-${BUILD_NUMBER}"
            sh "docker rmi ${registry}/${docker_image}:${base_branch}-${BUILD_NUMBER}"
        }
    }
}


return this