monorepo-management

SKILL.md 节选

# Monorepo Management

Build efficient, scalable monorepos that enable code sharing, consistent tooling, and atomic changes across multiple packages and applications.

## When to Use This Skill

- Setting up new monorepo projects
- Migrating from multi-repo to monorepo
- Optimizing build and test performance
- Managing shared dependencies
- Implementing code sharing strategies
- Setting up CI/CD for monorepos
- Versioning and publishing packages
- Debugging monorepo-specific issues

## Core Concepts

### 1. Why Monorepos?

**Advantages:**
- Shared code and dependencies
- Atomic commits across projects
- Consistent tooling and standards
- Easier refactoring
- Simplified dependency management
- Better code visibility

**Challenges:**
- Build performance at scale
- CI/CD complexity
- Access control
- Large Git repository

### 2. Monorepo Tools

**Package Managers:**
- pnpm workspaces (recommended)
- npm workspaces
- Yarn workspaces

**Build Systems:**
- Turborepo (recommended for most)
- Nx (feature-rich, complex)
- Lerna (older, maintenance mode)

## Turborepo Setup

### Initial Setup

```bash
# Create new monorepo
npx create-turbo@latest my-monorepo
cd my-monorepo

# Structure:
# apps/
#   web/          - Next.js app
#   docs/         - Documentation site
# packages/
#   ui/           - Shared UI components
#   config/       - Shared configurations
#   tsconfig/     - Shared TypeScript configs
# turbo.json      - Turborepo configuration
# package.json    - Root package.json
```

### Configuration

```json
// turbo.json
{
  "$schema": "https://turbo.build/schema.json",
  "globalDependencies": ["**/.env.*local"],
  "pipeline": {
    "build": {
      "dependsOn": ["^build"],
      "outputs": ["dist/**", ".next/**", "!.next/cache/**"]
    },
    "test": {
      "dependsOn": ["build"],
      "outputs": ["coverage/**"]
    },
    "lint": {
      "outputs": []
    },
    "dev": {
      "cache": false,
      "persistent": true
    },
    "type-check": {
      "dependsOn": ["^build"],
      "outputs": []
    }
  }
}
```

```json
// package.json (root)
{
  "name": "my-monorepo",
  "private": true,
  "workspaces": [
    "apps/*",
    "packages/*"
  ],
  "scripts": {
    "build": "turbo run build",
    "dev": "turbo run dev",
    "test": "turbo run test",
    "lint": "turbo run lint",
    "format": "prettier --write \"**/*.{ts,tsx,md}\"",
    "clean": "turbo run clean && rm -rf node_modules"
  },
  "devDependencies": {
    "turbo": "^1.10.0",
    "prettier": "^3.0.0",
    "typescript": "^5.0.0"
  },
  "packageManager": "pnpm@8.0.0"
}
```

### Package Structure

```json
// packages/ui/package.json
{
  "name": "@repo/ui",
  "version": "0.0.0",
  "private": true,
  "main": "./dist/index.js",
  "types": "./dist/index.d.ts",
  "exports": {
    ".": {
      "import": "./dist/index.js",
      "types": "./dist/index.d.ts"
    },
    "./button": {
      "import": "./dist/button.js",
      "types": "./dist/button.d.ts"
    }
  },
  "scripts": {
    "build": "tsup src/index.ts --format esm,cjs --dts",
    "dev": "tsup src/index.ts --format esm,cjs --dts --watch",
    "lint": "eslint src/",
    "type-check": "tsc --noEmit"
  },
  "devDependencies": {
    "@repo/tsconfig": "workspace:*",
    "tsup": "^7.0.0",
    "typescript": "^5.0.0"
  },
  "dependencies": {
    "react": "^18.2.0"
  }
}
```

## pnpm Workspaces

### Setup

```yaml
# pnpm-workspace.yaml
packages:
  - 'apps/*'
  - 'packages/*'
  - 'tools/*'
```

```json
// .npmrc
# Hoist shared dependencies
shamefully-hoist=true

# Strict peer dependencies
auto-install-peers=true
strict-peer-dependencies=true

# Performance
store-dir=~/.pnpm-store
```

### Dependency Management

```bash
# Install dependency in specific package
pnpm add react --filter @repo/ui
pnpm add -D typescript --filter @repo/ui

# Install workspace dependency
pnpm add @repo/ui --filter web

# Install in all packages
pnpm add -D eslint -w

# Update all dependencies
pnpm update -r

# Remove dependency
pnpm remove react --filter @repo/ui
```

### Scripts

```bash
# Run script in specific package
pnpm --filter web dev

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