CI                    CD (Delivery)         CD (Deployment)
Push → Build → Test → Ready to deploy →     Auto deploy
                      ↑ ручная кнопка       ↑ автоматически

my-project/
├── .github/
│   └── workflows/
│       ├── ci.yml          # основной CI pipeline
│       ├── deploy.yml      # деплой
│       └── lint.yml        # линтер
├── src/
└── package.json

# Строки
name: My Workflow
message: "Hello, World!"

# Списки
steps:
  - first
  - second
  - third

# Объекты (вложенность через отступы — 2 пробела!)
job:
  name: Build
  runs-on: ubuntu-latest

# Многострочные строки
description: |
  Это многострочный текст.
  Каждая строка сохраняется.

# Название workflow (видно во вкладке Actions)
name: CI

# Триггеры — когда запускать
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

# Задачи
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Install dependencies
        run: npm install
      - name: Run tests
        run: npm test

on:
  push:
    branches: [main, develop]
    paths:
      - 'src/**'
      - 'package.json'

on:
  pull_request:
    branches: [main]
    types: [opened, synchronize, reopened]

on:
  schedule:
    - cron: '0 9 * * 1'  # Каждый понедельник в 9:00 UTC

on:
  workflow_dispatch:
    inputs:
      environment:
        description: 'Deploy environment'
        required: true
        default: 'staging'

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

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - run: npm ci
      - run: npm run lint

  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - run: npm ci
      - run: npm test

  build:
    runs-on: ubuntu-latest
    needs: [lint, test]  # ждёт завершения lint и test
    steps:
      - uses: actions/checkout@v4
      - run: npm ci
      - run: npm run build

steps:
  # Шаг 1: клонировать репозиторий
  - uses: actions/checkout@v4

  # Шаг 2: установить Node.js
  - uses: actions/setup-node@v4
    with:
      node-version: '20'
      cache: 'npm'

  # Шаг 3: установить зависимости
  - name: Install dependencies
    run: npm ci

  # Шаг 4: запустить тесты
  - name: Run tests
    run: npm test

name: CI

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

jobs:
  test:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        node-version: [18, 20]

    steps:
      - uses: actions/checkout@v4

      - name: Use Node.js ${{ matrix.node-version }}
        uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

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

      - name: Upload coverage
        if: matrix.node-version == 20
        uses: actions/upload-artifact@v4
        with:
          name: coverage-report
          path: coverage/

name: Lint

on:
  pull_request:
    branches: [main]

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

      - uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'

      - run: npm ci

      - name: ESLint
        run: npm run lint

      - name: TypeScript check
        run: npx tsc --noEmit

      - name: Prettier check
        run: npx prettier --check "src/**/*.{ts,tsx}"

name: Full CI

on:
  pull_request:
    branches: [main]

jobs:
  quality:
    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 run lint
      - run: npx tsc --noEmit
      - run: npm test -- --coverage
      - run: npm run build

# .github/dependabot.yml
version: 2
updates:
  - package-ecosystem: npm
    directory: /
    schedule:
      interval: weekly
    open-pull-requests-limit: 10