ci-cd-pipeline

CI/CD Pipeline

When to use this skill

• Setting up CI/CD for a new project
• Adding GitHub Actions workflows
• Optimizing slow CI pipelines
• Adding automated testing, linting, or deployments
• Setting up release automation

GitHub Actions: Standard CI workflow

# .github/workflows/ci.yml
name: CI

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

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

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
      - run: npm run lint
      - run: npm run typecheck

  test:
    runs-on: ubuntu-latest
    needs: lint
    strategy:
      matrix:
        node-version: [18, 20, 22]
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}
          cache: 'npm'
      - run: npm ci
      - run: npm test -- --coverage
      - uses: actions/upload-artifact@v4
        if: matrix.node-version == 20
        with:
          name: coverage
          path: coverage/

  build:
    runs-on: ubuntu-latest
    needs: test
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: 'npm'
      - run: npm ci
      - run: npm run build

GitHub Actions: Common patterns

Caching dependencies

# Node.js
- uses: actions/setup-node@v4
  with:
    node-version: 20
    cache: 'npm'  # Built-in caching

# Python
- uses: actions/setup-python@v5
  with:
    python-version: '3.12'
    cache: 'pip'

# Custom cache
- uses: actions/cache@v4
  with:
    path: ~/.cache/custom
    key: ${{ runner.os }}-custom-${{ hashFiles('**/config.lock') }}
    restore-keys: ${{ runner.os }}-custom-

Database services for integration tests

services:
  postgres:
    image: postgres:16
    env:
      POSTGRES_USER: test
      POSTGRES_PASSWORD: test
      POSTGRES_DB: testdb
    ports:
      - 5432:5432
    options: >-
      --health-cmd pg_isready
      --health-interval 10s
      --health-timeout 5s
      --health-retries 5

  redis:
    image: redis:7
    ports:
      - 6379:6379