Workflow

# GitHub Actions CI/CD 워크플로우 예제
# .github/workflows/ci-cd.yml

name: CI/CD Pipeline

on:
  push:
    branches: [main, develop]
  pull_request:
    branches: [main]
  # 수동 실행 가능
  workflow_dispatch:
    inputs:
      environment:
        description: '배포 환경'
        required: true
        default: 'staging'
        type: choice
        options:
          - staging
          - production

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

jobs:
  # 1단계: 린트 및 타입 체크
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

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

      - name: Install dependencies
        run: npm ci

      - name: Run ESLint
        run: npm run lint

      - name: Run TypeScript check
        run: npm run type-check

  # 2단계: 테스트 (린트와 병렬 실행)
  test:
    runs-on: ubuntu-latest
    services:
      postgres:
        image: postgres:15
        env:
          POSTGRES_PASSWORD: test
        ports:
          - 5432:5432
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5

    steps:
      - uses: actions/checkout@v4

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

      - name: Install dependencies
        run: npm ci

      - name: Run tests
        run: npm test -- --coverage
        env:
          DATABASE_URL: postgresql://postgres:test@localhost:5432/test

      - name: Upload coverage
        uses: codecov/codecov-action@v3
        with:
          token: ${{ secrets.CODECOV_TOKEN }}

  # 3단계: 빌드 (린트, 테스트 완료 후)
  build:
    needs: [lint, test]
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    outputs:
      image-tag: ${{ steps.meta.outputs.tags }}

    steps:
      - uses: actions/checkout@v4

      - 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=sha,prefix=
            type=ref,event=branch

      - name: Build and push
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  # 4단계: 배포 (main 브랜치만)
  deploy:
    needs: build
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    environment:
      name: production
      url: https://myapp.example.com

    steps:
      - name: Deploy to Kubernetes
        uses: azure/k8s-deploy@v4
        with:
          action: deploy
          manifests: k8s/
          images: ${{ needs.build.outputs.image-tag }}

      - name: Notify Slack
        uses: slackapi/slack-github-action@v1
        with:
          payload: |
            {
              "text": "Deployed ${{ github.sha }} to production"
            }
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK }}