docker-image.yml

name: Create and Publish Docker image

on:
  push:
    branches: [ "master" ]
    paths:
      - 'Dockerfile'
  pull_request:
    types:
      - closed
    branches: [ "master" ]
    paths:
      - 'Dockerfile'
    
env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}/klayout

jobs:
  build-and-push-image:
  
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      
    steps:
      - name: Check pull request was merged
        if: github.event_name == 'pull_request' && github.event.action == 'closed' && github.event.pull_request.merged == false
        run: |
          echo "Error: Pull request is not merged."
          exit 1

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

      - name: Get the current date
        id: date
        run: echo "::set-output name=date::$(date +%Y%m%d)"
        
      - name: Log in to the container registry
        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
          
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          
      - name: Build and push Docker image as latest image
        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}-latest
          labels: ${{ steps.meta.outputs.labels }}

      - name: Build and push Docker image as unique image
        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
        with:
          context: .
          push: true
          tags: "${{ steps.meta.outputs.tags }}.${{ steps.date.outputs.date }}.${{ github.run_number }}"
          labels: ${{ steps.meta.outputs.labels }}