build-containers.yml

name: Build images

on:
  pull_request:
    branches: [ "main" ]  
  schedule:
    - cron: "15 0 * * *" 
  workflow_dispatch:

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

jobs:
  build-container:
    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: ["310", "311", "312"]
    steps:
      - name: Setup dockerfile
        run: |
          cp v3-dockerfile-test-suite-PY${{ matrix.python-version }} Dockerfile
          
      - name: Login 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: ghcr.io/${{ env.IMAGE_NAME }}-PY${{ matrix.python-version }}

      - name: Build and push Docker image
        id: push
        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
        with:
          context: .
          # only push from main
          push: github.ref == 'refs/heads/main'
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

      - name: Generate artifact attestation
        uses: actions/attest-build-provenance@v1
        with:
          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
          subject-digest: ${{ steps.push.outputs.digest }}
          push-to-registry: true