images.yaml

---
name: build-images

on:
  pull_request:
    branches:
      - main
  push:
    branches:
      - main
  schedule:
    - cron: "0 0 * * *"

env:
  REGISTRY: ghcr.io

jobs:
  list:
    runs-on: ubuntu-latest
    outputs:
      images: ${{ steps.output-images.outputs.images }}
    steps:
      - uses: actions/checkout@v3
      - name: list images
        id: output-images
        run: |
          echo "images=$(ls images | jq -R -s -c 'split("\n")[:-1]')" >> $GITHUB_OUTPUT

  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    needs: list
    strategy:
      matrix:
        image: ${{fromJSON(needs.list.outputs.images)}}
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 2
      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v38
        with:
          files: |
            images/${{ matrix.image }}/**
      - name: changed files
        if: steps.changed-files.outputs.any_changed == 'true'
        run: |
          echo ${{ steps.changed-files.outputs.any_changed }}
          echo "List all the files that have changed: ${{ steps.changed-files-specific.outputs.all_changed_files }}"
      - name: Log in to the Container registry
        if: steps.changed-files.outputs.any_changed == 'true' || github.event_name != 'pull_request'
        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Extract metadata (tags, labels) for Docker
        if: steps.changed-files.outputs.any_changed == 'true' || github.event_name != 'pull_request'
        id: meta
        uses: docker/metadata-action@818d4b7b91585d195f67373fd9cb0332e31a7175
        with:
          images: ${{ env.REGISTRY }}/${{ github.repository }}/${{ matrix.image }}
      - name: Build and push Docker image
        if: steps.changed-files.outputs.any_changed == 'true' || github.event_name != 'pull_request'
        uses: docker/build-push-action@2eb1c1961a95fc15694676618e422e8ba1d63825
        with:
          context: images/${{ matrix.image }}
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}