name: Tests

on:
  pull_request:
    branches:
      - master
      - main

jobs:
  buildx:
    name: Test image build
    runs-on: ubuntu-latest

    # Set job-wide environment variables
    #  - REPO: repo name on dockerhub
    #  - IMAGE: image name on dockerhub
    env:
      REPO: mikenye
      IMAGE: picard

    strategy:
      matrix:
        docker-platform:
          - linux/amd64
         # - linux/arm64
         # - linux/arm/v6
         # - linux/arm/v7
         # - linux/i386
    steps:

      # Check out our code
      -
        name: Checkout
        uses: actions/checkout@v2

      # Hit an issue where arm builds would fail with cURL errors regarding intermediary certificates when downloading from github (ie: deploy-s6-overlay).
      # After many hours of troubleshooting, the workaround is to pre-load the image's rootfs with the CA certificates from the runner.
      # This problem may go away in future.
      - 
        name: Copy CA Certificates from GitHub Runner to Image rootfs
        run: |
          ls -la /etc/ssl/certs/
          mkdir -p ./rootfs/etc/ssl/certs
          mkdir -p ./rootfs/usr/share/ca-certificates/mozilla
          cp --no-dereference /etc/ssl/certs/*.crt ./rootfs/etc/ssl/certs
          cp --no-dereference /etc/ssl/certs/*.pem ./rootfs/etc/ssl/certs
          cp --no-dereference /usr/share/ca-certificates/mozilla/*.crt ./rootfs/usr/share/ca-certificates/mozilla

      # Set up QEMU for multi-arch builds
      -
        name: Set up QEMU
        uses: docker/setup-qemu-action@v1

      # Set up buildx for multi platform builds
      -
        name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1

      # Get archictecture suffix
      -
        name: Get image architecture suffix
        run: |
          echo "ARCH_TAG=$(echo '${{ matrix.docker-platform }}' | cut -d '/' -f2- | tr -s '/' '_')" >> $GITHUB_ENV
      
      # Show archictecture suffix
      -
        name: Show image architecture suffix
        run: |
          echo "Architecture suffix: ${{ env.ARCH_TAG }}"

      # Test container build for all supported platforms (defined above)
      - 
        name: Build ${{ matrix.docker-platform }}
        run: docker buildx build --no-cache --progress plain -t "${{ env.REPO }}/${{ env.IMAGE }}:testing_${{ env.ARCH_TAG }}" --platform "${{ matrix.docker-platform }}" .