build.yml

name: Build Docker Container
on:
  push:
    branches: ['*']
      # - main

env:
  REGISTRY: ghcr.io
  BUILD_PLATFORMS: linux/amd64,linux/arm64
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
         # Ref: https://github.com/Zenika/alpine-chrome
        chromium_version:
          - 'latest'
          - '89'
        build_variant:
          - ''
          - 'with-chromedriver'
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

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

      - name: Login to the Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=${{ matrix.chromium_version }}

      - name: Determine base image tag
        id: container-base
        run: |
          #
          # Setup base image tag as follows:
          # - If the chromium_version is set to "latest" and build_variant is empty: use "latest"
          # - If the chromium_version is set to "latest" and build_variant is specified: use build_variant
          # - Otherwise: concatenate chromium_version and build_variant
          #
          # Ref: https://github.com/Zenika/alpine-chrome for image naming convention
          #
          if [[ "${{ matrix.chromium_version }}" == "latest" && "${{ matrix.build_variant }}" != "" ]]; then
            build_tag="${{ matrix.build_variant }}"
          elif [[ "${{ matrix.build_variant }}" == "" ]]; then
            build_tag="${{ matrix.chromium_version }}"
          else
            build_tag="${{ matrix.chromium_version }}-${{ matrix.build_variant }}"
          fi

          echo "tag=${build_tag}" >> $GITHUB_OUTPUT

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          build-args: |
            BASE_IMAGE_TAG=${{ steps.container-base.outputs.tag }}
          platforms: ${{ env.BUILD_PLATFORMS }}
          push: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
          tags: ${{ steps.meta.outputs.tags }}
          cache-from: type=gha
          cache-to: type=gha,mode=max