github-packages.yml

---
name: Publish Container image to GH Packages

on:
  pull_request:
    branches: [master]
    paths-ignore:
      - '*.md'

concurrency:
  group: ${{ github.workflow }}-${{ github.ref_name }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  gh_container_registry:
    name: Push Docker image to GitHub Packages
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: read
      id-token: write # needed for signing the images with GitHub OIDC Token
    steps:
      - name: Checkout
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0

      - name: Install cosign
        uses: sigstore/cosign-installer@e1523de7571e31dbe865fd2e80c5c7c23ae71eb4 # v3.4.0

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56 # v5.1.0
        with:
          context: .
          push: true
          sbom: true
          tags: ghcr.io/${{ github.repository }}/ghcr-test:${{ github.sha }}

      - name: Sign the images with GitHub OIDC Token
        env:
          DIGEST: ${{ steps.docker_build.outputs.digest }}
          TAGS: ghcr.io/${{ github.repository }}/ghcr-test
        run: cosign sign --yes "${TAGS}@${DIGEST}"

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}