.github/workflows/docker_push.yml

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# this work for additional information regarding copyright ownership.
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# (the "License"); you may not use this file except in compliance with
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name: "Build and Push Docker Images"

on:
  workflow_dispatch:
  push:
    branches:
      - master
      - 'dev-*'
    tags:
      - '*-*.*'
  pull_request:
    branches:
      - master
      - 'dev-*'

env:
  REGISTRY: ghcr.io
  OWNER: ${{ github.repository_owner }}
  IMAGE_REPO: flink-docker

jobs:
  build_and_push:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        include:
          # Flink 1.20.x
          - flink_version: "1.20"
            java_version: "8"
            dockerfile: "1.20/scala_2.12-java8-ubuntu/Dockerfile"
          - flink_version: "1.20"
            java_version: "11"
            dockerfile: "1.20/scala_2.12-java11-ubuntu/Dockerfile"
          - flink_version: "1.20"
            java_version: "17"
            dockerfile: "1.20/scala_2.12-java17-ubuntu/Dockerfile"
          # Flink 2.1.x
          - flink_version: "2.1"
            java_version: "11"
            dockerfile: "2.1/scala_2.12-java11-ubuntu/Dockerfile"
          - flink_version: "2.1"
            java_version: "17"
            dockerfile: "2.1/scala_2.12-java17-ubuntu/Dockerfile"
          - flink_version: "2.1"
            java_version: "21"
            dockerfile: "2.1/scala_2.12-java21-ubuntu/Dockerfile"
          # Flink 2.2.x
          - flink_version: "2.2"
            java_version: "11"
            dockerfile: "2.2/scala_2.12-java11-ubuntu/Dockerfile"
          - flink_version: "2.2"
            java_version: "17"
            dockerfile: "2.2/scala_2.12-java17-ubuntu/Dockerfile"
          - flink_version: "2.2"
            java_version: "21"
            dockerfile: "2.2/scala_2.12-java21-ubuntu/Dockerfile"
          # Flink 2.3.x (Latest)
          - flink_version: "2.3"
            java_version: "11"
            dockerfile: "2.3/scala_2.12-java11-ubuntu/Dockerfile"
          - flink_version: "2.3"
            java_version: "17"
            dockerfile: "2.3/scala_2.12-java17-ubuntu/Dockerfile"
          - flink_version: "2.3"
            java_version: "21"
            dockerfile: "2.3/scala_2.12-java21-ubuntu/Dockerfile"

    steps:
      - name: Check out the repo
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd

      - name: Log in to the Container registry
        uses: docker/login-action@b45d80f862d83dbcd57f89517bcf500b2ab88fb2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Determine image tags
        id: meta
        run: |
          FLINK_VERSION="${{ matrix.flink_version }}"
          JAVA_VERSION="${{ matrix.java_version }}"

          # Read full version from Dockerfile (e.g., 2.1.1)
          # Extract from FLINK_TGZ_URL which contains the version
          DOCKERFILE_PATH="${{ matrix.dockerfile }}"
          FULL_VERSION=$(grep "FLINK_TGZ_URL=" "$DOCKERFILE_PATH" | head -1 | sed -E 's/.*flink-([0-9]+\.[0-9]+\.[0-9]+).*/\1/')

          if [ -z "$FULL_VERSION" ]; then
            echo "ERROR: Could not extract version from $DOCKERFILE_PATH"
            exit 1
          fi

          echo "full_version=$FULL_VERSION" >> $GITHUB_OUTPUT

          # Build base image name
          BASE_TAG="${FULL_VERSION}-scala_2.12-java${JAVA_VERSION}"

          # Determine tags based on event type
          TAGS="${REGISTRY}/${OWNER}/${IMAGE_REPO}:${BASE_TAG}"

          # Add branch-specific tags for branch pushes
          if [ "${{ github.event_name }}" = "push" ] && [ "${{ github.ref_type }}" = "branch" ]; then
            BRANCH_NAME=$(echo "${{ github.ref_name }}" | sed 's/\//-/g')
            TAGS="${TAGS},${REGISTRY}/${OWNER}/${IMAGE_REPO}:${BRANCH_NAME}-java${JAVA_VERSION}"
            TAGS="${TAGS},${REGISTRY}/${OWNER}/${IMAGE_REPO}:${BRANCH_NAME}-${FLINK_VERSION}-java${JAVA_VERSION}"
          fi

          # Add git sha tag
          SHORT_SHA=$(echo "${{ github.sha }}" | cut -c1-7)
          TAGS="${TAGS},${REGISTRY}/${OWNER}/${IMAGE_REPO}:${BASE_TAG}-${SHORT_SHA}"

          echo "tags=$TAGS" >> $GITHUB_OUTPUT
          echo "Image tags: $TAGS"

      - name: Build and push Docker image
        uses: docker/build-push-action@ca052bb54ab0790a636c9b5f226502c73d547a25
        with:
          context: ${{ matrix.flink_version }}/scala_2.12-java${{ matrix.java_version }}-ubuntu
          file: ${{ matrix.dockerfile }}
          platforms: linux/amd64,linux/arm64/v8
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Summary
        if: github.event_name != 'pull_request'
        run: |
          echo "✅ Successfully built and pushed Flink ${{ steps.meta.outputs.full_version }} with Java ${{ matrix.java_version }}"
          echo "Tags:"
          echo "${{ steps.meta.outputs.tags }}" | tr ',' '\n' | sed 's/^/  - /'