build_image_target-test-base_jammy-py.yml

name: Build and push Docker images with multiple Python versions

on:
  push:
    branches:
      - master
    paths:
      - 'target-test-base_jammy-py/**'
      - '.github/workflows/build_image_target-test-base_jammy-py.yml'
  pull_request:
    paths:
      - 'target-test-base_jammy-py/**'
      - '.github/workflows/build_image_target-test-base_jammy-py.yml'
  workflow_dispatch:
    inputs:
      python_3_8_17:
        description: 'Python 3.8.17'
        required: false
        type: boolean
        default: true
      python_3_9_17:
        description: 'Python 3.9.17'
        required: false
        type: boolean
        default: false
      # Add more versions as needed...

env:
  IMAGE_DIR: ./target-test-base_jammy-py
  IMAGE_BASE_NAME: ghcr.io/${{ github.repository }}/target-test-base-jammy
  IMAGE_ARCHS: linux/amd64,linux/arm

jobs:
  build-and-push-docker-image:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python_version: ["3.8.17", "3.9.17"] # Add more versions as needed.
        include:
          - python_version: "3.8.17"
            build_this_version: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.python_3_8_17 == 'true' || github.event_name != 'workflow_dispatch' }}
          - python_version: "3.9.17"
            build_this_version: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.python_3_9_17 == 'true' || github.event_name != 'workflow_dispatch' }}

    steps:
      - name: Checkout Repository
        if: matrix.build_this_version
        uses: actions/checkout@v2

      - name: Extract Major/Minor Version from Full Version
        id: extract_version
        run: |
          echo "PYTHON_VERSION=${{ matrix.python_version }}" >> $GITHUB_ENV
          echo "PYTHON_VERSION_MM=$(echo "${{ matrix.python_version }}" | cut -d'.' -f1,2)" >> $GITHUB_ENV

      - name: Setup QEMU for Multi-Arch Builds
        uses: docker/setup-qemu-action@v1

      - name: Setup Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Login to GitHub Container Registry (GHCR)
        uses: docker/login-action@v1 
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Pull Docker image to use as cache (for master)
        if: github.event_name == 'push' && github.ref == 'refs/heads/master'
        run: |
          docker pull ${{ env.IMAGE_BASE_NAME }}:py${{ matrix.python_version }} || true

      - name: Cache Docker layers (for PRs)
        if: github.event_name == 'pull_request'
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: buildx-${{ matrix.python_version }}-${{ github.sha }}
          restore-keys: |
            buildx-${{ matrix.python_version }}-

      - name: Build and Push Docker Image
        if: matrix.build_this_version
        uses: docker/build-push-action@v2
        with:
          context: ${{ env.IMAGE_DIR }}
          platforms: ${{env.IMAGE_ARCHS}}
          tags: ${{ env.IMAGE_BASE_NAME }}:py${{ matrix.python_version }}
          build-args: |
            PYTHON_VERSION=${{ env.PYTHON_VERSION }}
            PYTHON_VERSION_MM=${{ env.PYTHON_VERSION_MM }}
          push: ${{ github.event_name != 'pull_request' }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache