带你了解并实践monorepo和pnpm，绝对干货！熬夜总结！

js
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├── packages
|   ├── pkg1
|   |   ├── package.json
|   ├── pkg2
|   |   ├── package.json
├── package.json
├── lerna.json

js
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node_modules
├─ foo
  ├─ node_modules
     ├─ bar
       ├─ index.js
       └─ package.json
  ├─ index.js
  └─ package.json

js
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{
    "engines": {
        "node": ">=16",
        "pnpm": ">=7"
    }
}

js
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{
    "private": true
}

yaml
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packages:  
# all packages in direct subdirs of packages/  
- 'packages/*'

sql
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pnpm add rollup chalk minimist npm-run-all typescript -Dw

js
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pnpm --filter mini-cli add react

sql
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pnpm add rollup-plugin-typescript2 @rollup/plugin-json @rollup/plugin-terser -Dw

js
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import { createRequire } from 'module'
import { fileURLToPath } from 'url'
import path from 'path'
import json from '@rollup/plugin-json'
import terser from '@rollup/plugin-terser'

const require = createRequire(import.meta.url)
const __dirname = fileURLToPath(new URL('.', import.meta.url))
const packagesDir = path.resolve(__dirname, 'packages')
const packageDir = path.resolve(packagesDir, process.env.TARGET)

const resolve = p => path.resolve(packageDir, p)
const pkg = require(resolve(`package.json`))
const packageOptions = pkg.buildOptions || {}
const name = packageOptions.filename || path.basename(packageDir)

// 定义输出类型对应的编译项
const outputConfigs = {
'esm-bundler': {
    file: resolve(`dist/${name}.esm-bundler.js`),
    format: `es`
  },
  'esm-browser': {
    file: resolve(`dist/${name}.esm-browser.js`),
    format: `es`
  },
  cjs: {
    file: resolve(`dist/${name}.cjs.js`),
    format: `cjs`
  },
  global: {
    name: name,
    file: resolve(`dist/${name}.global.js`),
    format: `iife`
  }
}

const packageFormats = ['esm-bundler', 'cjs']
const packageConfigs = packageFormats.map(format => createConfig(format, outputConfigs[format]))

export default packageConfigs

function createConfig(format, output, plugins = []) {
  // 是否输出声明文件
  const shouldEmitDeclarations = !!pkg.types
  
  const minifyPlugin = format === 'global' && format === 'esm-browser' ? [terser()] : []
  return {
      input: resolve('src/index.ts'),
  // Global and Browser ESM builds inlines everything so that they can be
  // used alone.
  external: [
      ...['path', 'fs', 'os', 'http'],
      ...Object.keys(pkg.dependencies||{}),
      ...Object.keys(pkg.peerDependencies || {}),
      ...Object.keys(pkg.devDependencies||{}),
    ],
  plugins: [
    json({
      namedExports: false
    }),
    ...minifyPlugin,
    ...plugins
  ],
  output,
  onwarn: (msg, warn) => {
    if (!/Circular/.test(msg)) {
      warn(msg)
    }
  },
  treeshake: {
    moduleSideEffects: false
  }
  }
}

js
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const fs = require('fs')
const {rm} = require('fs/promises')
const path = require('path')
const allTargets = (fs.readdirSync('packages').filter(f => {
    // 过滤掉非目录文件
    if (!fs.statSync(`packages/${f}`).isDirectory()) {
      return false
    }
    const pkg = require(`../packages/${f}/package.json`)
    // 过滤掉私有包和不带编译配置的包
    if (pkg.private && !pkg.buildOptions) {
      return false
    }
    return true
  }))

js
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const build = async function (target) { 
    const pkgDir = path.resolve(`packages/${target}`)
    const pkg = require(`${pkgDir}/package.json`)

    // 编译前移除之前生成的产物
    await rm(`${pkgDir}/dist`,{ recursive: true, force: true })
    
    // -c 指使用配置文件 默认为rollup.config.js
    // --environment 向配置文件传递环境变量 配置文件通过proccess.env.获取
    await execa(
        'rollup',
        [
          '-c',
          '--environment',
          [
            `TARGET:${target}`
          ]
            .filter(Boolean)
            .join(',')
        ],
        { stdio: 'inherit' }
    )
}

js
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const targets = allTargets // 上面的获取的子包
const maxConcurrency = 4 // 并发编译个数

const buildAll = async function () {
  const ret = []
  const executing = []
  for (const item of targets) {
  // 依次对子包执行build()操作
    const p = Promise.resolve().then(() => build(item))
    ret.push(p)

    if (maxConcurrency <= targets.length) {
      const e = p.then(() => executing.splice(executing.indexOf(e), 1))
      executing.push(e)
      if (executing.length >= maxConcurrency) {
        await Promise.race(executing)
      }
    }
  }
  return Promise.all(ret)
}
// 执行编译操作
buildAll()

json
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{
    "scripts": {
    "build": "node scripts/build.js"
  },
}

json
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{
"buildOptions": {
    "name": "tools", // 定义global时全局变量的名称
    "filename": "tools", // 定义输出的文件名 比如tools.esm-browser.js 生成的文件为[filename].[format].js
    "formats": [ // 定义输出
      "esm-bundler",
      "esm-browser",
      "cjs",
      "global"
    ]
  },
}

js
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const defaultFormats = ['esm-bundler', 'cjs']
const packageFormats = packageOptions.formats || defaultFormats // 优先使用每个包里自定义的formats
const packageConfigs = packageFormats.map(format => createConfig(format, outputConfigs[format]))

arduino
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pnpm run build tools --formats global

js
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const args = require('minimist')(process.argv.slice(2))
const targets = args._.length ? args._ : allTargets
const formats = args.formats || args.f

js
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await execa(
        'rollup',
        [
          '-c',
          '--environment', // 传递环境变量  配置文件可通过proccess.env.获取
          [
            `TARGET:${target}`,
            formats ? `FORMATS:${formats}` : `` // 将参数继续传递 
          ]
            .filter(Boolean)
            .join(',')
        ],
        { stdio: 'inherit' }
    )

js
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const defaultFormats = ['esm-bundler', 'cjs']
const inlineFormats = process.env.FORMATS && process.env.FORMATS.split(',') // 获取rollup传递过来的环境变量process.env.FORMATS
const packageFormats = inlineFormats || packageOptions.formats || defaultFormats

js
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// 是否输出声明文件 取每个包的package.json的types字段
  const shouldEmitDeclarations = !!pkg.types

  const tsPlugin = ts({
    tsconfig: path.resolve(__dirname, 'tsconfig.json'),
    tsconfigOverride: {
      compilerOptions: {
        target: format === 'cjs' ? 'es2019' : 'es2015',
        sourceMap: true,
        declaration: shouldEmitDeclarations,
        declarationMap: shouldEmitDeclarations
      }
    }
  })
  
  return {
      ...
      plugins: [
        json({
          namedExports: false
        }),
        tsPlugin,
        ...minifyPlugin,
        ...plugins
      ],
    }

json
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{
  "extends": "../../api-extractor.json",
  "mainEntryPointFilePath": "./dist/packages/<unscopedPackageName>/src/index.d.ts", // rollup生成的声明文件
  "dtsRollup": {
    "publicTrimmedFilePath": "./dist/<unscopedPackageName>.d.ts" // 抽离为一个声明文件到dist目录下
  }
}

js
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build(target) {
    await execa('rollup')
    // 执行完rollup生成声明文件后
    // package.json中定义此字段时执行
    if (pkg.types) { 
        console.log(
          chalk.bold(chalk.yellow(`Rolling up type definitions for ${target}...`))
        )
        // 执行API Extractor操作 重新生成声明文件
        const { Extractor, ExtractorConfig } = require('@microsoft/api-extractor')
        const extractorConfigPath = path.resolve(pkgDir, `api-extractor.json`)
        const extractorConfig =
         ExtractorConfig.loadFileAndPrepare(extractorConfigPath)
         const extractorResult = Extractor.invoke(extractorConfig, {
          localBuild: true,
          showVerboseMessages: true
        })
        if (extractorResult.succeeded) {
          console.log(`API Extractor completed successfully`);
          process.exitCode = 0;
        } else {
          console.error(`API Extractor completed with ${extractorResult.errorCount} errors`
            + ` and ${extractorResult.warningCount} warnings`);
          process.exitCode = 1;
        }
        
        // 删除ts生成的声明文件
        await rm(`${pkgDir}/dist/packages`,{ recursive: true, force: true })
      }
}

sql
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pnpm add @changesets/cli -Dw

csharp
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npx changeset init

json
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{
  "$schema": "https://unpkg.com/@changesets/config@2.3.0/schema.json",
  "changelog": "@changesets/cli/changelog",
  "commit": false, // 是否提交因changeset和changeset version引起的文件修改
  "fixed": [], // 设置一组共享版本的包 一个组里的包，无论有没有修改、是否有依赖，都会同步修改到相同的版本
  "linked": [], // 设置一组需要关联版本的包 有依赖关系或有修改的包会同步更新到相同版本 未修改且无依赖关系的包则版本不做变化
  "access": "public", // 发布为私有包/公共包
  "baseBranch": "main",
  "updateInternalDependencies": "patch", // 确保依赖包是否更新、更新版本的衡量单位
  "ignore": [] // 忽略掉的不需要发布的包
}

yaml
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---
'@scope/mini-cli': major
'@scope/tools': minor
---

update packages

json
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{
    "scripts": {
        "release": "run-s build releaseOnly",
        "releaseOnly": "changeset publish"
    }
}

json
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{
    "simple-git-hooks": {
        "pre-commit": "pnpm lint-staged" // 注册提交前操作 即进行代码格式校验
      },
    "lint-staged": {
        "*.{js,json}": [
          "prettier --write"
        ],
        "*.ts?(x)": [
          "eslint",
          "prettier --parser=typescript --write"
        ]
    },
}

json
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"scripts": {
    "postinstall": "simple-git-hooks",
  },

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npm install -g commitizen

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npm install -g cz-conventional-changelog

json
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// mac用户
echo '{ "path": "cz-conventional-changelog" }' > ~/.czrc

sql
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pnpm add @commitlint/config-conventional @commitlint/cli -Dw

arduino
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echo "module.exports = {extends: ['@commitlint/config-conventional']}" > commitlint.config.js

json
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"simple-git-hooks": {
    "commit-msg": "npx --no -- commitlint --edit ${1}"
  },