pr-docker-image.yml

name: Publish Docker Image for PR

on:
    workflow_dispatch:  # Manual trigger
    pull_request:

jobs:
  build-and-push-pr-image:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      packages: write
      id-token: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3.3.0

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3.8.0

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3.3.0
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Pihole version from Dockerfile
        id: extract-version
        run: |
          VERSION=$(grep -oP '(?<=pihole/pihole:)\S+' docker/Dockerfile)
          echo "Extracted pihole version is: $VERSION"
          echo "PIHOLE_VERSION=$VERSION" >> "$GITHUB_OUTPUT"

      - name: Build and push PR Docker image
        uses: docker/build-push-action@v6.12.0
        with:
          context: docker/
          push: true
          tags: |
            ghcr.io/${{ github.repository_owner }}/docker-pihole-unbound:pr${{ github.event.number }}-${{ github.run_number }}-${{ github.sha }}
          platforms: linux/amd64,linux/386,linux/arm/v6,linux/arm/v7,linux/arm64
          cache-from: type=gha
          cache-to: type=gha,mode=max