.gitlab-ci.yml

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

.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
        DOCKER_TLS_CERTDIR: ""
    before_script:
        - |
          echo "CI_BUILD_IMAGE is $CI_BUILD_IMAGE"
          echo "CI_COMMIT_REF_NAME is $CI_COMMIT_REF_NAME"
          echo "CI_REGISTRY_IMAGE is $CI_REGISTRY_IMAGE"
          echo "CI_COMMIT_REF_SLUG is $CI_COMMIT_REF_SLUG"
          echo "CI_COMMIT_SHA is $CI_COMMIT_SHAE"
          echo "CI_REGISTRY is $CI_REGISTRY"
          echo "CI_PROJECT_NAMESPACE is $CI_PROJECT_NAMESPACE"
          echo "CI_PROJECT_NAME is $CI_PROJECT_NAME"
          if [[ -z "$CI_COMMIT_TAG" ]]; then
            echo "Commit tag not set"
            export CI_APPLICATION_REPOSITORY=${CI_APPLICATION_REPOSITORY:-$CI_REGISTRY_IMAGE/$CI_COMMIT_REF_SLUG}
            echo "CI_APPLICATION_REPOSITORY is $CI_APPLICATION_REPOSITORY"
            export CI_APPLICATION_TAG=${CI_APPLICATION_TAG:-$CI_COMMIT_SHA}
          else
            echo "CI_COMMIT_TAG is $CI_COMMIT_TAG"
            echo "CI_REGISTRY_IMAGE is $CI_REGISTRY_IMAGE"
            export CI_APPLICATION_REPOSITORY=${CI_APPLICATION_REPOSITORY:-$CI_REGISTRY_IMAGE}
            echo "CI_APPLICATION_REPOSITORY is $CI_APPLICATION_REPOSITORY"
            export CI_APPLICATION_TAG=${CI_APPLICATION_TAG:-$CI_COMMIT_TAG}
          fi 
        - |
          if [[ -z $DOCKER_USERNAME ]] && [[ -z $DOCKER_PASSWORD ]]; then
            echo "Setting gitlab containers (Username $CI_REGISTRY_USER) credentials"
            echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" --password-stdin $CI_REGISTRY
          else
            echo "Setting docker username ($DOCKER_USERNAME) and password"
            echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
          fi

build:buildx-master:
    extends: .build
    only:
        refs:
            - master
        variables:
            - $CI_BUILDX_ARCHS
    script:
        - update-binfmts --enable
        - docker buildx create --driver docker-container --use
        - docker buildx inspect --bootstrap
        - docker buildx ls
        - |
          if [[ -z $DOCKER_USERNAME ]] && [[ -z $DOCKER_PASSWORD ]]; then
            echo "Build to gitlab only"
            docker buildx build --platform $CI_BUILDX_ARCHS --progress plain --pull -t "$CI_REGISTRY_IMAGE" --push .
          else
            echo "Build to docker hub"
            if [[ ! -z $CI_COMMIT_TAG ]]; then
              echo "Building to tag ($CI_COMMIT_TAG)"
              docker buildx build \
              --platform $CI_BUILDX_ARCHS \
              --tag $DOCKER_USERNAME/buildx-test:$CI_COMMITTAG \
              --output "type=registry" .
            else
              echo "Building to latest"
               docker buildx build \
              --platform $CI_BUILDX_ARCHS \
              --tag $DOCKER_USERNAME/$CI_PROJECT_NAME:latest \
              --output "type=registry" .           
            fi
          fi

build:buildx-tags-or-branch:
    extends: .build
    only:
      variables:
        - $CI_BUILDX_ARCHS
    except:
      refs:
        - master
    script:
      - update-binfmts --enable
      - |
        echo "Variables set by CI"
        echo "CI_APPLICATION_TAG: $CI_APPLICATION_TAG"
        echo "CI_COMMIT_TAG: $CI_COMMIT_TAG"
        echo "CI_COMMIT_BRANCH: $CI_COMMIT_BRANCH"
        echo "CI_COMMIT_SHORT_SHA: $CI_COMMIT_SHORT_SHA"
      - |
          echo "Setup buildx"
          docker buildx inspect --bootstrap
          docker buildx ls          
          docker buildx create --driver docker-container --use
          
          if [[ -z $DOCKER_USERNAME ]] && [[ -z $DOCKER_PASSWORD ]]; then
            echo "Build to gitlab containers"
            if [ ! -z  $CI_COMMIT_TAG ]; then
              echo "Building $CI_COMMIT_TAG (tag mode)"
              echo "Repo to push to $CI_APPLICATION_REPOSITORY:$CI_COMMIT_TAG-$CI_COMMIT_SHORT_SHA"
              docker buildx build \
                --platform $CI_BUILDX_ARCHS \
                --build-arg VERSION=$CI_COMMIT_TAG \
                --progress plain \
                --pull \
                -t "$CI_APPLICATION_REPOSITORY:$CI_COMMIT_TAG" --push \
                .
            else
              echo "Not building by tag as CI_COMMIT_TAG is empty"
            fi
            if [ ! -z $CI_COMMIT_BRANCH ]; then
              echo "Building $CI_COMMIT_BRANCH (branch mode - pick latest version, don't use VERSION=)"
              echo "Repo to push to $CI_APPLICATION_REPOSITORY:$CI_COMMIT_SHORT_SHA"
              docker buildx build \
                --platform $CI_BUILDX_ARCHS \
                --progress plain --pull \
                -t "$CI_APPLICATION_REPOSITORY:$CI_COMMIT_SHORT_SHA" --push \
                .
            else
              echo "Not building by branch as CI_COMMIT_BRANCH is empty"
            fi
          else
            echo "Build to dockerhub"
            if [[ ! -z $CI_COMMIT_TAG ]]; then
              echo "Building to tag ($CI_COMMIT_TAG)"
              docker buildx build \
              --platform $CI_BUILDX_ARCHS \
              --build-arg VERSION=$CI_COMMIT_TAG \
              --tag $DOCKER_USERNAME/$CI_PROJECT_NAME:$CI_COMMITTAG \
              --output "type=registry" .
            else
              echo "Building to latest"
               docker buildx build \
              --platform $CI_BUILDX_ARCHS \
              --tag $DOCKER_USERNAME/$CI_PROJECT_NAME:latest \
              --output "type=registry" .           
            fi            
          fi