name: Build and Test

on:
  push:
    branches:
      - '**'
    tags-ignore:
      - '*'
  pull_request:

defaults:
  run:
    shell: 'bash -Eeuo pipefail -x {0}'

jobs:
  generate-matrix:
    name: Generate Matrix
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.generate.outputs.matrix }}
    steps:
      - uses: actions/checkout@master
      - id: generate
        name: Enumerate Dockerfiles
        run: |
          matrix="$(dirname */Dockerfile | sort -rn | jq -csR 'rtrimstr("\n") | split("\n") | { directory: . }')"
          echo "::set-output name=matrix::$matrix"
  build-image:
    needs: generate-matrix
    runs-on: ubuntu-latest
    strategy:
      matrix: ${{ fromJson(needs.generate-matrix.outputs.matrix) }}
    name: ${{ matrix.directory }}
    steps:
      - uses: actions/checkout@master
      - name: Clone docker-library/official-images (for testing)
        run: |
          git clone --depth 1 --single-branch https://github.com/docker-library/official-images.git
      - name: Build image
        run: |
          docker version
          dir='${{ matrix.directory }}'
          img="perl:${dir//,/-}"
          docker build -t "$img" "$dir"
      - name: Inspect image creation and tag time
        run: |
          dir='${{ matrix.directory }}'
          img="perl:${dir//,/-}"
          docker image inspect --format '{{.Created}}' "$img"
          docker image inspect --format '{{.Metadata.LastTagTime}}' "$img"
      - name: Run tests
        run: |
          dir='${{ matrix.directory }}'
          img="perl:${dir//,/-}"
          ./official-images/test/run.sh "$img"