preview-environments-builder

preview:
  runs-on: ubuntu-latest
  steps:
    - uses: actions/checkout@v4
 
    - name: Build Docker image
      run: |
        docker build -t myapp:pr-${{ github.event.pull_request.number }} .
 
    - name: Deploy to Kubernetes
      run: |
        kubectl create namespace pr-${{ github.event.pull_request.number }} || true
        kubectl apply -f k8s/preview.yml \
          --namespace pr-${{ github.event.pull_request.number }}
        kubectl set image deployment/myapp \
          myapp=myapp:pr-${{ github.event.pull_request.number }} \
          --namespace pr-${{ github.event.pull_request.number }}
 
    - name: Get preview URL
      id: url
      run: |
        URL=$(kubectl get ingress myapp \
          --namespace pr-${{ github.event.pull_request.number }} \
          -o jsonpath='{.status.loadBalancer.ingress[0].hostname}')
        echo "url=https://pr-${{ github.event.pull_request.number }}.preview.myapp.com" >> $GITHUB_OUTPUT
 
    - name: Comment PR
      uses: actions/github-script@v7
      with:
        script: |
          github.rest.issues.createComment({
            issue_number: context.issue.number,
            owner: context.repo.owner,
            repo: context.repo.repo,
            body: `🚀 Preview deployed to: ${{ steps.url.outputs.url }}`
          })

# .github/workflows/cleanup-preview.yml
name: Cleanup Preview
 
on:
  pull_request:
    types: [closed]
 
jobs:
  cleanup:
    runs-on: ubuntu-latest
    steps:
      - name: Delete Vercel deployment
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const deployments = await github.rest.repos.listDeployments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              environment: `preview-${context.issue.number}`
            });
 
            for (const deployment of deployments.data) {
              await github.rest.repos.createDeploymentStatus({
                owner: context.repo.owner,
                repo: context.repo.repo,
                deployment_id: deployment.id,
                state: 'inactive'
              });
 
              await github.rest.repos.deleteDeployment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                deployment_id: deployment.id
              });
            }
 
      - name: Cleanup Kubernetes namespace
        run: |
          kubectl delete namespace pr-${{ github.event.pull_request.number }} --ignore-not-found=true

# Consistent naming pattern
environment:
  name: preview-pr-${{ github.event.pull_request.number }}
  url: https://pr-${{ github.event.pull_request.number }}.preview.myapp.com

- name: Setup preview database
  run: |
    # Create database
    psql -c "CREATE DATABASE preview_pr_${{ github.event.pull_request.number }};"
 
    # Seed with test data
    npm run db:seed -- --database=preview_pr_${{ github.event.pull_request.number }}
  env:
    DATABASE_URL: ${{ secrets.PREVIEW_DB_URL }}