build_images.yml

---
name: "Build Docker images"
on:
  push:
    branches: ['**']
  release:
    types: [released]
env:
  IMAGE_NAME: "${{ secrets.DOCKER_ORG }}/nansat_base"
jobs:
  build_docker_images:
    runs-on: 'ubuntu-20.04'
    strategy:
      matrix:
        version:
          - {'python': '3.7', 'latest': true}
          - {'python': '3.8', 'latest': false}
          - {'python': '3.9', 'latest': false}
          - {'python': '3.10', 'latest': false}
    steps:
      - name: 'Checkout repository'
        uses: actions/checkout@v4

      - name: "Extract tag name"
        id: get_version
        run: |
          if [[ $GITHUB_REF == refs/tags/* ]];then
            TAG="${GITHUB_REF#refs/tags/}"
          else
            TAG='tmp'
          fi
          echo "VERSION=${TAG}" >> $GITHUB_OUTPUT

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Cache Docker layers
        uses: actions/cache@v3
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-python${{ matrix.version.python }}-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-python${{ matrix.version.python }}-

      - name: Login to DockerHub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_USER }}
          password: ${{ secrets.DOCKER_PASS }}

      - name: Build standard docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: Dockerfile
          target: 'standard'
          build-args: 'PYTHON_VERSION=${{ matrix.version.python }}'
          push: ${{ startsWith(github.ref, 'refs/tags/') }}
          tags: |
            ${{ env.IMAGE_NAME }}:latest-python${{ matrix.version.python }}
            ${{ env.IMAGE_NAME }}:${{ steps.get_version.outputs.VERSION }}-python${{ matrix.version.python }}
            ${{ matrix.version.latest && format('{0}:latest', env.IMAGE_NAME) || '' }}
          cache-from: |
            type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache-new

      - name: Build slim docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: Dockerfile
          target: 'slim'
          build-args: 'PYTHON_VERSION=${{ matrix.version.python }}'
          push: ${{ startsWith(github.ref, 'refs/tags/') }}
          tags: |
            ${{ env.IMAGE_NAME }}:latest-slim-python${{ matrix.version.python }}
            ${{ env.IMAGE_NAME }}:${{ steps.get_version.outputs.VERSION }}-slim-python${{ matrix.version.python }}
            ${{ matrix.version.latest && format('{0}:latest-slim', env.IMAGE_NAME) || '' }}
          cache-from: |
            type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache-new

        # Temp fix
        # https://github.com/docker/build-push-action/issues/252
        # https://github.com/moby/buildkit/issues/1896
      - name: Move cache
        run: |
          rm -rf /tmp/.buildx-cache
          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
...