example-build-deploy.yml

name: Build and Deploy with LayerLint
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

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

jobs:
  # Step 1: Lint the Dockerfile
  lint:
    runs-on: ubuntu-latest
    name: Lint Dockerfile
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
      
      - name: Install LayerLint
        run: |
          curl -sSL https://github.com/vviveksharma/layerLint/releases/download/v1.0.0/layerLint_1.0.0_Linux_x86_64.tar.gz | tar xz
          chmod +x layerlint
      
      - name: Scan Dockerfile
        run: ./layerlint scan --dockerfile ./Dockerfile --fail-on-severity high
      
      - name: Comment PR with findings
        if: github.event_name == 'pull_request'
        uses: actions/github-script@v6
        with:
          script: |
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: '✅ LayerLint scan completed. Check the logs for details.'
            })

  # Step 2: Build the Docker image
  build:
    needs: lint
    runs-on: ubuntu-latest
    name: Build Docker Image
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
      
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      
      - name: Log in to Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      
      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=sha,prefix={{branch}}-
            type=raw,value=latest,enable={{is_default_branch}}
      
      - name: Build and push Docker image
        id: build
        uses: docker/build-push-action@v5
        with:
          context: .
          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
      
      - name: Image digest
        run: echo "Image pushed with digest ${{ steps.build.outputs.digest }}"

  # Step 3: Deploy (only on main branch)
  deploy:
    needs: build
    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
    runs-on: ubuntu-latest
    name: Deploy to Production
    steps:
      - name: Deploy notification
        run: |
          echo "🚀 Deploying to production..."
          # Add your deployment commands here