build-gitlab-container-PR.yml

name: 'Build GitLab CI container (PR)'

on:
  push:
    paths:
      - docker-contributor/php-config
      - docker-gitlabci/**
      - .github/workflows/build-gitlab-container-PR.yml
  pull_request:
    branches:
      - main
    paths:
      - docker-contributor/php-config
      - docker-gitlabci/**
      - .github/workflows/build-gitlab-container-PR.yml

jobs:
  pr-gitlab:
    # Stop processing if this is a merge-queue
    # Stop processing if this is not against our repo
    # Always run if this PR is not from our organization
    # Or run if this PR is not `main` (So notQueue && ourRepo && (notPROurOrg || notMain))
    if : ${{ !contains(github.ref, 'gh-readonly-queue') &&
             github.repository == 'domjudge/domjudge-packaging' &&
             !(github.event.pull_request.head.repo.full_name == 'domjudge/domjudge-packaging' && github.ref == 'main') }}
    name: PR GitLab image
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: read
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Use the same PHP config as the contributor containers
        run: cp -r docker-{contributor,gitlabci}/php-config

      - name: Log in to GitHub Container registry (possibly at fork)
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}

      - name: Build and push Docker images
        uses: docker/build-push-action@v5
        with:
          context: "./docker-gitlabci" 
          push: false
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}