publish.yml

name: Build and publish images for container registries

on:
  workflow_run:
    workflows: [release]
    types:
      - completed

jobs:
  build:
    name: Build images
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      id-token: write # needed for signing the images with GitHub OIDC Token
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 1
      
      - name: Install Cosign
        uses: sigstore/cosign-installer@v3.4.0

      # https://github.com/docker/setup-qemu-action
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      # https://github.com/docker/setup-buildx-action
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3.0.0
        with:
          driver-opts: image=moby/buildkit:master

      - name: Login 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 images
        id: build-and-push
        env:
          GIT_TAG: ${{ github.ref }}
        uses: docker/bake-action@v4.1.0
        with:
          files: |
            ./docker-bake.hcl
          targets: default
          push: false
          provenance: true
          sbom: true

      - name: Run container
        run: |
          echo "Starting container"
          docker run --pull "never" -d --name albedo-test "${REPO}:0"
          docker logs albedo-test

      - name: Verify container
        run: |
          [ $(docker inspect albedo-test --format='{{.State.Running}}') = 'true' ]

      - name: Sign the images with GitHub OIDC Token
        env:
          METADATA: ${{ steps.build-and-push.outputs.metadata }}
        run: |
          DIGEST=$(echo ${METADATA} | jq -r '.[] | ."containerimage.digest"')
          TAGS=$(echo ${METADATA} | jq -r '.[] | ."image.name" | tostring' | tr ',' '\n')
          images=""
          for tag in ${TAGS}; do
            images+="${tag}@${DIGEST} "
          done
          cosign sign --yes ${images}