test.yml

name: Test

on:
  pull_request:
    paths:
      - "images/**/*"

concurrency:
  # Cancel in-progress jobs if a new job is trigged by a commit from the same branch
  # https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#concurrency
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  collect:
    name: Collect images from directories
    runs-on: ubuntu-latest
    # Map step outputs to job outputs, so that the data can be used in upcoming jobs
    # https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idoutputs
    outputs:
      IMAGES: ${{ steps.images.outputs.directories }}

    steps:
      - name: Checkout repository
        # https://github.com/marketplace/actions/checkout
        uses: actions/checkout@v4
        with:
          persist-credentials: false

      - name: Collect images from directories
        id: images
        run: |
          cd images
          directories=$(tree -J -d -L 1 | jq -c '.[0].contents | map(.name)')
          echo $directories
          echo "directories=$directories" >> $GITHUB_OUTPUT

  test:
    name: Test
    runs-on: ubuntu-latest
    needs: [collect]

    strategy:
      fail-fast: false
      matrix:
        image: ${{ fromJson(needs.collect.outputs.IMAGES) }}

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          persist-credentials: false

      - name: Build and push
        # https://github.com/marketplace/actions/build-and-push-docker-images
        uses: docker/build-push-action@v6
        with:
          context: ./images/${{ matrix.image }}
          load: true
          tags: ${{ matrix.image }}