variables:
  CI_BUILD_IMAGE: "registry.gitlab.com/ericvh/docker-buildx-qemu"
  CI_BUILDX_ARCHS: "linux/amd64,linux/arm64,linux/arm"

.build:
  image: $CI_BUILD_IMAGE
  stage: build
  services:
    - name: docker:dind
      entrypoint: ["env", "-u", "DOCKER_HOST"]
      command: ["dockerd-entrypoint.sh"]
  variables:
    DOCKER_HOST: tcp://docker:2375/
    DOCKER_DRIVER: overlay2
    # See https://github.com/docker-library/docker/pull/166
    DOCKER_TLS_CERTDIR: ""
  retry: 2
  before_script:
    - |
      if [[ -z "$CI_COMMIT_TAG" ]]; then
        export CI_APPLICATION_REPOSITORY=${CI_APPLICATION_REPOSITORY:-$CI_REGISTRY_IMAGE/$CI_COMMIT_REF_SLUG}
        export CI_APPLICATION_TAG=${CI_APPLICATION_TAG:-$CI_COMMIT_SHA}
      else
        export CI_APPLICATION_REPOSITORY=${CI_APPLICATION_REPOSITORY:-$CI_REGISTRY_IMAGE}
        export CI_APPLICATION_TAG=${CI_APPLICATION_TAG:-$CI_COMMIT_TAG}
      fi
    - echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" --password-stdin $CI_REGISTRY

build:buildx-master:
  extends: .build
  only: 
    refs:
      - master
    variables:
      - $CI_BUILDX_ARCHS
  script:
    # Use docker-container driver to allow useful features (push/multi-platform)
    - update-binfmts --enable # Important: Ensures execution of other binary formats is enabled in the kernel
    - docker buildx create --driver docker-container --use
    - docker buildx inspect --bootstrap
    - docker buildx ls
    - docker buildx build --platform $CI_BUILDX_ARCHS --progress plain --pull -t "$CI_REGISTRY_IMAGE" --push .

build:buildx:
  extends: .build
  only:
    variables:
      - $CI_BUILDX_ARCHS
  except:
    refs:
       - master
  script:
    - update-binfmts --enable # Important: Ensures execution of other binary formats is enabled in the kernel
    - docker buildx create --driver docker-container --use
    - docker buildx inspect --bootstrap
    - docker buildx ls
    - docker buildx build --platform $CI_BUILDX_ARCHS --progress plain --pull -t "$CI_APPLICATION_REPOSITORY:$CI_APPLICATION_TAG" --push .