go-ethereum/.github/workflows/build-deploy-image.yml

name: Docker image build test
run-name: ${{ github.actor }} testing docker build
on: push

# Docs/Guide provides info that ghcr is supported out of the box with the docker actions + recommend usage of action sha.

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  Build-Container-Image:
    runs-on: ubuntu-latest


    #if: ${{ github.event.label.name == 'CI:Build' }} # source: https://stackoverflow.com/questions/62325286/run-github-actions-when-pull-requests-have-a-specific-label
    
    # Run the build once the merge is complete: https://github.com/orgs/community/discussions/26724#discussioncomment-3253096
    if: github.event_name == 'pull_request' && github.event.action == 'closed' && github.event.pull_request.merged == true

    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v5

      - 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
        id: push
        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

      - name: Generate artifact attestation
        uses: actions/attest@v4
        with:
          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
          subject-digest: ${{ steps.push.outputs.digest }}
          push-to-registry: true