ci-workflow.yml

name: CI Workflow - Build Docker Images

# CI is applied to every push event to any branch,
# except for the upstream branch that is auto-tracking the original Strimzi repository.
on:
  push:
    branches-ignore:
      - upstream

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Determine checkout ref based on event
        id: set_checkout_ref
        run: |
          if [ "${{ github.event_name }}" = "pull_request" ]; then
            echo "checkout_ref=${{ github.event.pull_request.head.ref }}" >> $GITHUB_OUTPUT
          else
            echo "checkout_ref=${{ github.ref }}" >> $GITHUB_OUTPUT
          fi 

      - name: Checkout Repository
        uses: actions/checkout@v4
        with:
          ref: ${{ steps.set_checkout_ref.outputs.checkout_ref }}

      - name: Set up Java 17
        uses: actions/setup-java@v3
        with:
          distribution: 'temurin'
          java-version: '17'
          cache: maven

      - name: Cache local Maven repository
        uses: actions/cache@v3
        with:
          path: ~/.m2/repository
          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
          restore-keys: |
            ${{ runner.os }}-maven-

      - name: Build with Maven
        run: mvn -B -V -e -Dfindbugs.skip -Dcheckstyle.skip -Dpmd.skip=true -Denforcer.skip -Dmaven.javadoc.skip -DskipTests -Dmaven.test.skip.exec -Dlicense.skip=true -Drat.skip=true clean install

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Maven Build and Install JAR files
        working-directory: docker-images/artifacts
        run: make java_install

      - name: Build Docker Images
        working-directory: docker-images
        run: make docker_build

      - name: Determine Image Tag
        id: image_tags
        run: |
          if [[ "${GITHUB_REF}" == refs/tags/* ]]; then
            # For tag push events, use the git tag as the image tag.
            TAG_NAME=${GITHUB_REF#refs/tags/}
            echo "Detected tag push: $TAG_NAME"
            echo "IMAGE_TAG=ghcr.io/${GITHUB_REPOSITORY_OWNER}/strimzi-kafka-operator:${TAG_NAME}" >> $GITHUB_OUTPUT
          elif [[ "${GITHUB_EVENT_NAME}" == "pull_request" ]]; then
            # For pull requests, use the commit SHA.
            echo "Detected pull_request event"
            echo "IMAGE_TAG=ghcr.io/${GITHUB_REPOSITORY_OWNER}/strimzi-kafka-operator:${GITHUB_SHA}" >> $GITHUB_OUTPUT
          else
            # For branch pushes, use the commit SHA.
            echo "Detected branch push: ${GITHUB_REF}"
            echo "IMAGE_TAG=ghcr.io/${GITHUB_REPOSITORY_OWNER}/strimzi-kafka-operator:${GITHUB_SHA}" >> $GITHUB_OUTPUT
          fi

      - name: Build Docker Image (CI Only)
        uses: docker/build-push-action@v3
        with:
          context: ./docker-images
          push: false
          tags: ${{ steps.image_tags.outputs.IMAGE_TAG }}