Setting Up CI/CD with GitHub Actions

name: CI Pipeline

on:
  push:
    branches: [ main, develop ]
  pull_request:
    branches: [ main ]

jobs:
  test:
    # The type of runner the job will run on
    runs-on: ubuntu-latest

    steps:
      # Check out the repository code
      - name: Checkout code
        uses: actions/checkout@v4

      # Set up Node.js environment
      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'

      # Install dependencies
      - name: Install dependencies
        run: npm ci

      # Run tests
      - name: Run tests
        run: npm test

      # Run linting
      - name: Run linter
        run: npm run lint

name: Full CI/CD Pipeline

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

jobs:
  # Job 1: Run tests
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'
      - run: npm ci
      - run: npm test

  # Job 2: Build the application
  build:
    runs-on: ubuntu-latest
    needs: test  # Waits for test job to complete
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'
      - run: npm ci
      - run: npm run build
      
      # Upload build artifacts
      - name: Upload build artifacts
        uses: actions/upload-artifact@v4
        with:
          name: build-output
          path: dist/

  # Job 3: Deploy to production
  deploy:
    runs-on: ubuntu-latest
    needs: build
    if: github.ref == 'refs/heads/main'  # Only deploy on main
    steps:
      - name: Download build artifacts
        uses: actions/download-artifact@v4
        with:
          name: build-output
          path: dist/

      - name: Deploy to server
        run: |
          echo "Deploying to production..."
          # Add your deployment commands here

name: Deploy with Secrets

on:
  push:
    branches: [ main ]

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Deploy to server
        env:
          SERVER_HOST: ${{ secrets.SERVER_HOST }}
          SSH_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
          DEPLOY_TOKEN: ${{ secrets.DEPLOY_TOKEN }}
        run: |
          echo "$SSH_KEY" > key.pem
          chmod 600 key.pem
          scp -i key.pem -r ./dist/* user@$SERVER_HOST:/var/www/app/
          rm key.pem

      - name: Notify deployment
        env:
          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
        run: |
          curl -X POST -H 'Content-type: application/json' \
            --data '{"text":"Deployment successful! 🚀"}' \
            $SLACK_WEBHOOK

name: Matrix CI

on: [push, pull_request]

jobs:
  test:
    runs-on: ${{ matrix.os }}
    
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
        node-version: [18, 20, 22]
        exclude:
          # Skip Node 18 on Windows to save time
          - os: windows-latest
            node-version: 18
      fail-fast: false  # Don't cancel other jobs if one fails

    steps:
      - uses: actions/checkout@v4
      
      - name: Setup Node.js ${{ matrix.node-version }}
        uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}
          cache: 'npm'
      
      - run: npm ci
      - run: npm test

      - name: Report results
        run: |
          echo "✅ Tests passed on ${{ matrix.os }} with Node ${{ matrix.node-version }}"

name: CI with Caching

on: [push, pull_request]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      # Method 1: Built-in cache in setup-node
      - uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'  # Caches ~/.npm, not node_modules

      # Method 2: Manual cache action (more control)
      - name: Cache node modules
        uses: actions/cache@v4
        with:
          path: ~/.npm
          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
          restore-keys: |
            ${{ runner.os }}-node-

      - run: npm ci
      - run: npm run build
      - run: npm test