docker-publish.yml

name: Build images and push to registry

on:
  schedule:
    - cron: '16 6 * * *'
  push:
    branches: [ main ]
  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:
  
  lint:

    runs-on: ubuntu-latest
    permissions:
      security-events: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Lint Dockerfile
        id: hadolint
        uses: hadolint/hadolint-action@v3.1.0
        with:
          dockerfile: Dockerfile
          format: sarif
          output-file: hadolint-results.sarif
          no-fail: true

      - name: Upload analysis results to GitHub
        uses: github/codeql-action/upload-sarif@v2
        with:
          sarif_file: hadolint-results.sarif
          wait-for-processing: true

      - name: Update Pull Request
        uses: actions/github-script@v6
        if: github.event_name == 'pull_request'
        with:
          script: |
            const output = `
            #### Hadolint: \`${{ steps.hadolint.outcome }}\`
            \`\`\`
            ${process.env.HADOLINT_RESULTS}
            \`\`\`
            `;

            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: output
            })
  
  build:

    runs-on: ubuntu-latest
    needs: [ lint ]
    permissions:
      contents: read
      packages: write
      id-token: write
    strategy:
      fail-fast: false
      matrix:
        php_version: [ "7", "8", "81", "82" ]
        include:
          - php_version: 7
            alpine_version: 3.15
          - php_version: 8
            alpine_version: 3.16
          - php_version: 81
            alpine_version: 3.17
          - php_version: 82
            alpine_version: edge

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        
      # 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@main

      - name: downcase REPO
        run: |
          echo "REPO=${GITHUB_REPOSITORY,,}" >>${GITHUB_ENV}
        
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2
        
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      # 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@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
          
      - name: Login to DockerHub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2 
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      # Build and push Docker image with Buildx (don't push on PR)
      # https://github.com/docker/build-push-action
      - name: Build and push php ${{ matrix.php_version }} image
        uses: docker/build-push-action@v4
        id: build-and-push
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            PHP_VERSION=${{ matrix.php_version }}
            ALPINE_VERSION=${{ matrix.alpine_version }}
          tags: |
            ${{ env.REGISTRY }}/${{ env.REPO }}:${{ matrix.php_version }}
            ${{ env.REPO }}:${{ matrix.php_version }}

      # 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:
          COSIGN_YES: "true"
        # This step uses the identity token to provision an ephemeral certificate
        # against the sigstore community Fulcio instance.
        run: |
          cosign sign ${{ env.REGISTRY }}/${{ env.REPO }}:${{ matrix.php_version }}@${{ steps.build-and-push.outputs.digest }}
          cosign sign ${{ env.REPO }}:${{ matrix.php_version }}@${{ steps.build-and-push.outputs.digest }}

  scan_image:
    runs-on: ubuntu-latest
    permissions:
      security-events: write
    if: ${{ always() }}
    needs:
      - build

    strategy:
      fail-fast: false
      matrix:
        php_version: [ "7", "8", "81", "82" ]

    steps:
      - name: downcase REPO
        run: |
          echo "REPO=${GITHUB_REPOSITORY,,}" >>${GITHUB_ENV}

      - name: Run Trivy vulnerability scanner for php ${{ matrix.php_version }}
        uses: aquasecurity/trivy-action@master
        with:
          image-ref: 'ghcr.io/${{ env.REPO }}:${{ matrix.php_version }}'
          format: 'sarif'
          output: 'trivy-php${{ matrix.php_version }}-results.sarif'

      - name: Upload Trivy scan results to GitHub Security tab
        uses: github/codeql-action/upload-sarif@v2
        if: always() 
        with:
          sarif_file: 'trivy-php${{ matrix.php_version }}-results.sarif'