check_rebuild:
  extends: .build-matrix
  image: docker:stable
  stage: build
  script: |
    echo "DOCKERFILE=${DOCKERFILE}"
    echo "DOCKER_IMAGE_REBUILD=1" > build.env
  artifacts:
    reports:
      dotenv: build.env
  rules:
    - if: '$CI_COMMIT_BRANCH == "master"'
    - if: $CI_COMMIT_BRANCH
      changes:
        - ${DOCKERFILE}
        - build-tools/litex_meta.sh
        - .gitlab/ci/build.gitlab-ci.yml

check_exists:
  extends: .build-matrix
  image: docker:stable
  stage: build
  script: |
    export DOCKER_CLI_EXPERIMENTAL=enabled
    docker manifest inspect $IMAGE:$CI_COMMIT_REF_NAME > /dev/null && \
        DOCKER_IMAGE_EXISTS=1 || DOCKER_IMAGE_EXISTS=0
    echo "DOCKER_IMAGE_EXISTS=${DOCKER_IMAGE_EXISTS}" > build.env
  artifacts:
    reports:
      dotenv: build.env

# With Gitlab 16.8 we should be able to do"
#  extends: .build-matrix
#  needs:
#    - job: check_rebuild
#      optional: true
#      parallel:
#        matrix:
#          - IMAGE_VARIANT: ['$[[ matrix.IMAGE_VARIANT ]]']
#    - job: check_exists
#      parallel:
#        matrix:
#          - IMAGE_VARIANT: ['$[[ matrix.IMAGE_VARIANT ]]']

.build:
  image: docker:stable
  stage: build
  variables:
  services:
    - name: mohs.dhcp.lbl.gov/docker:29.4.0-dind
      command: ["--insecure-registry", "mohs.dhcp.lbl.gov"]
      alias: docker
  before_script:
    - cat /etc/hosts
    - cat /etc/resolv.conf
    - docker info
    - echo $IMAGE:$CI_COMMIT_REF_NAME
    - echo $IMAGE:$CI_COMMIT_SHORT_SHA
    - echo $IMAGE:$CI_PROJECT_NAME-$CI_COMMIT_SHORT_SHA
  script: |
    echo "DOCKER_IMAGE_REBUILD=${DOCKER_IMAGE_REBUILD}"
    echo "DOCKER_IMAGE_EXISTS=${DOCKER_IMAGE_EXISTS}"
    if [ \( -z "$DOCKER_IMAGE_REBUILD" -o "$DOCKER_IMAGE_REBUILD" == "0" \) -a \
        "$DOCKER_IMAGE_EXISTS" == "1" ]; then
      exit 0
    fi
    IMAGE_BASENAME=${IMAGE##*/}
    docker pull $IMAGE:latest || true
    docker build --cache-from $IMAGE:latest \
        -t $IMAGE:$CI_COMMIT_REF_NAME \
        -t $IMAGE:$CI_PROJECT_NAME-$CI_COMMIT_SHORT_SHA \
        -t $IMAGE:latest \
        -f Dockerfile.${IMAGE_BASENAME} \
        .
    docker run --rm $IMAGE bash -c 'echo -n "Debian version: "; cat "/etc/debian_version"'
    docker push $IMAGE:$CI_COMMIT_REF_NAME
    docker push $IMAGE:$CI_PROJECT_NAME-$CI_COMMIT_SHORT_SHA
    docker push $IMAGE:latest


build_bookworm:
  extends: .build
  variables:
    IMAGE_VARIANT: bookworm
    IMAGE: ${CI_REGISTRY}/${IMAGE_BASE}_${IMAGE_VARIANT}
  needs:
    - job: check_rebuild
      optional: true
      parallel:
        matrix:
          - IMAGE_VARIANT: bookworm
    - job: check_exists
      parallel:
        matrix:
          - IMAGE_VARIANT: bookworm

build_trixie:
  extends: .build
  variables:
    IMAGE_VARIANT: trixie
    IMAGE: ${CI_REGISTRY}/${IMAGE_BASE}_${IMAGE_VARIANT}
  needs:
    - job: check_rebuild
      optional: true
      parallel:
        matrix:
          - IMAGE_VARIANT: trixie
    - job: check_exists
      parallel:
        matrix:
          - IMAGE_VARIANT: trixie