docker-publish.yml

name: Docker Publish

on:
  # Trigger after extension-publish workflow completes successfully
  workflow_run:
    workflows: ["Publish Extensions"]
    types: [completed]
  # Keep PR builds for testing Docker build process
  pull_request:
    branches: [main]

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}

jobs:
  docker-scope:
    if: github.event_name == 'pull_request'
    runs-on: ubuntu-latest
    outputs:
      should_run: ${{ steps.scope.outputs.should_run }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Detect Docker-relevant changes
        id: scope
        run: |
          git fetch origin "${{ github.base_ref }}" --depth=1
          CHANGED_FILES=$(git diff --name-only "origin/${{ github.base_ref }}"...HEAD)
          echo "$CHANGED_FILES"

          if printf '%s\n' "$CHANGED_FILES" | grep -Eq \
            '^(server/package\.json|server/package-lock\.json|server/\.npmrc|server/config.*\.json|server/resources/|server/src/|\.github/workflows/docker-publish\.yml)'; then
            echo "should_run=true" >> "$GITHUB_OUTPUT"
          else
            echo "should_run=false" >> "$GITHUB_OUTPUT"
          fi

  build-and-push:
    needs: docker-scope
    # Run if: extension-publish succeeded OR pull request
    if: >-
      (github.event_name == 'workflow_run' && github.event.workflow_run.conclusion == 'success')
      || (github.event_name == 'pull_request' && needs.docker-scope.outputs.should_run == 'true')
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      # This is used to complete the identity challenge
      # with sigstore/fulcio when running outside of PRs.
      id-token: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          # For workflow_run: use the branch/tag from the triggering workflow
          # For pull_request: use default ref
          ref: ${{ github.event_name == 'workflow_run' && github.event.workflow_run.head_branch || github.ref }}

      # Install the cosign tool except on PR
      # https://github.com/sigstore/cosign-installer
      - name: Install cosign
        if: github.event_name != 'pull_request'
        uses: sigstore/cosign-installer@v4.1.0
        with:
          cosign-release: "v2.2.2"

      - uses: actions/setup-node@v6
        with:
          node-version: 24

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: Extract version
        id: version
        run: |
          if [ "${{ github.event_name }}" = "workflow_run" ]; then
            # For workflow_run, extract from head_branch (tag name like v1.1.0)
            branch='${{ github.event.workflow_run.head_branch }}'
            if [[ "$branch" =~ ^v([0-9]+\.[0-9]+\.[0-9]+) ]]; then
              version="${BASH_REMATCH[1]}"
            else
              # Fallback: read from package.json
              version=$(node -p "require('./server/package.json').version")
            fi
          else
            # For PR, use package.json version with -pr suffix
            version=$(node -p "require('./server/package.json').version")-pr
          fi
          echo "version=$version" >> $GITHUB_OUTPUT

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v4
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v6
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=${{ steps.version.outputs.version }}
            type=raw,value=${{ steps.version.outputs.version }},suffix=-{{sha}}
            type=sha,format=long

      # Build and push Docker image with Buildx (don't push on PR)
      # https://github.com/docker/build-push-action
      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v7
        with:
          context: server
          file: server/src/Dockerfile
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      # Sign the resulting Docker image digest except on PRs.
      # This will only write to the public Rekor transparency log when the Docker
      # repository is public to avoid leaking data.  If you would like to publish
      # transparency data even for private images, pass --force to cosign below.
      # https://github.com/sigstore/cosign
      - name: Sign the published Docker image
        if: ${{ github.event_name != 'pull_request' }}
        env:
          TAGS: ${{ steps.meta.outputs.tags }}
          DIGEST: ${{ steps.build-and-push.outputs.digest }}
        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}