.gitlab-ci.yml

stages:
  - build

variables:
  REGISTRY: $CI_REGISTRY  # GitLab provides this variable for the registry URL
  IMAGE_NAME: $CI_PROJECT_PATH  # GitLab equivalent to GitHub's repository variable
  GIT_SUBMODULE_STRATEGY: recursive
  BUILDX_NAME: "buildx-$CI_JOB_ID"


build_and_publish:
  stage: build
  image: docker:24.0  # Use the Docker image for building
  services:
    - docker:24.0-dind  # Docker-in-Docker service
  variables:
    DOCKER_TLS_CERTDIR: ""  # Disable TLS for communication with Docker daemon
  before_script:
    - echo "Logging in to registry" 
    - echo "The CI registry is $CI_REGISTRY"
    - echo "The CI registry user is $CI_REGISTRY_USER"
    - echo $CI_REGISTRY_PASSWORD | docker login $CI_REGISTRY --username $CI_REGISTRY_USER --password-stdin
    - THREADS=$(nproc)
    # Check if THREADS is a valid integer, otherwise set to 4
    - if ! [[ "$THREADS" =~ ^[0-9]+$ ]]; then THREADS=4; fi
    - echo "Number of CPU threads is $THREADS"
    - docker info  # Verify Docker client can connect to Docker daemon

  script:
    # Check out the repository (this happens automatically in GitLab)
    - echo "Checking out the repository"

    # Add support for QEMU (optional, similar to GitHub Actions setup-qemu)
    - docker run --rm --privileged multiarch/qemu-user-static --reset -p yes

    # Set up Docker Buildx

    - docker buildx create --name $BUILDX_NAME --use
    - docker buildx inspect --bootstrap

    # Extract metadata (this requires custom commands in GitLab)
    - TAG=$(if [[ "$CI_COMMIT_TAG" != "" ]]; then echo "$CI_COMMIT_TAG"; else echo "latest-$(date +%Y%m%d)"; fi)
    - echo "TAG=$TAG"

    # Build and push Docker image
    - echo "Building and pushing Docker image $REGISTRY/$IMAGE_NAME with tag $TAG"
    - |
      docker buildx build  --builder $BUILDX_NAME --provenance=false --platform linux/arm64,linux/amd64 \
        --build-arg THREADS=$THREADS \
        -t $REGISTRY/$IMAGE_NAME:$TAG \
        -t $REGISTRY/$IMAGE_NAME:latest \
        --push .

  only:
    - tags

after_script:
  - echo "Cleaning up buildx"
  - docker buildx rm $BUILDX_NAME