Gradle build docker image with multiple tags

build-docker.gradle

// Using two docker builds as a workaround until multiple tags are
// supported (https://github.com/Transmode/gradle-docker/issues/50).

task createDockerTasks() {
  buildDockerWithTag('latest')
  buildDockerWithTag(version)
}

task buildDocker(dependsOn: [createDockerTasks, buildDocker_latest, "buildDocker_${version}"]) {
}


def buildDockerWithTag(tag) {
  return tasks.create("buildDocker_${tag}", Docker) {
    println "build docker with tag ${tag}"

    applicationName = "${project.group}/${jar.baseName}"
    tagVersion = tag
    setEnvironment('JAVA_OPTS', docker_java_opts)
    addFile('src/main/resources/docker/start.sh', "/data/")
    addFile(jar.archivePath, "/data/")
    entryPoint(['sh', "/data/start.sh", "/data/${jar.archiveName}"])
  
    push = docker_push == 'true'
    registry docker_registry
  }
}