pipeline {
  agent any
  def docker_image

  stages {
    stage('Checkout SCM') {
      steps {
        checkout scm
      }
    }
    
    stage('Build image') {
      steps {
        sh '/usr/bin/env'
        /* This builds the actual image; synonymous to
         * docker build on the command line */
        docker_image = docker.build("jenkins/sos-milter")
      }
    }

    stage('Test image') {
      steps {
        /* Ideally, we would run a test framework against our image.
         * For this example, we're using a Volkswagen-type approach ;-) */
        docker_image.inside {
          sh 'echo "Tests passed"'
        }
      }
    }
  
    stage('Push image') {
      steps {
        docker.withRegistry('https://dockreg-fra.zwackl.de') {
          docker_image.push()
        }
      }
    }
  }
}