version: 2
jobs:
  # Define in CircleCi Project Variables: $DOCKERHUB_REPO, $DOCKERHUB_USER, $DOCKERHUB_PASS
  # Publish jobs require those variables
  publish_docker_linuxamd64:
    machine:
      docker_layer_caching: true
    steps:
      - checkout  
      - run:
          command: |
            cd docker-compose-generator
            sudo docker login --username=$DOCKERHUB_USER --password=$DOCKERHUB_PASS
            sudo docker build --pull -t $DOCKERHUB_REPO:latest-amd64 -f linuxamd64.Dockerfile .
            sudo docker push $DOCKERHUB_REPO:latest-amd64

  publish_docker_linuxarm32v7:
    machine:
      docker_layer_caching: true
    steps:
      - checkout  
      - run:
          command: |
            sudo docker run --rm --privileged multiarch/qemu-user-static:register --reset
            #
            cd docker-compose-generator
            sudo docker login --username=$DOCKERHUB_USER --password=$DOCKERHUB_PASS
            sudo docker build --pull -t $DOCKERHUB_REPO:latest-arm32v7 -f linuxarm32v7.Dockerfile .
            sudo docker push $DOCKERHUB_REPO:latest-arm32v7

  publish_docker_multiarch:
    machine:
      enabled: true
      image: circleci/classic:201808-01
    steps:
      - run:
          command: |
            # Turn on Experimental features
            sudo mkdir $HOME/.docker
            sudo sh -c 'echo "{ \"experimental\": \"enabled\" }" >> $HOME/.docker/config.json'
            #
            sudo docker login --username=$DOCKERHUB_USER --password=$DOCKERHUB_PASS
            #
            sudo docker manifest create --amend $DOCKERHUB_REPO:latest $DOCKERHUB_REPO:latest-amd64 $DOCKERHUB_REPO:latest-arm32v7
            sudo docker manifest annotate $DOCKERHUB_REPO:latest $DOCKERHUB_REPO:latest-amd64 --os linux --arch amd64
            sudo docker manifest annotate $DOCKERHUB_REPO:latest $DOCKERHUB_REPO:latest-arm32v7 --os linux --arch arm --variant v7
            sudo docker manifest push $DOCKERHUB_REPO:latest -p

workflows:
  version: 2
  publish:
    jobs:
      - publish_docker_linuxamd64:
          filters:
            branches:
              only: dcg-latest
      - publish_docker_linuxarm32v7:
          filters:
            branches:
              only: dcg-latest
      - publish_docker_multiarch:
          requires:
            - publish_docker_linuxamd64
            - publish_docker_linuxarm32v7
          filters:
            branches:
              only: dcg-latest