1.准备工作 #

1.1 monorepo #

1278ae09f1de08186e9e70fe3bb1c4d1

1.2 Lerna #

1.2.1 安装 #

npm i lerna -g

1.2.2 初始化 #

lerna init
命令 功能
lerna bootstrap 安装依赖
lerna clean 删除各个包下的node_modules
lerna init 创建新的lerna库
lerna list 查看本地包列表
lerna changed 显示自上次release tag以来有修改的包, 选项通 list
lerna diff 显示自上次release tag以来有修改的包的差异, 执行 git diff
lerna exec 在每个包目录下执行任意命令
lerna run 执行每个包package.json中的脚本命令
lerna add 添加一个包的版本为各个包的依赖
lerna import 引入package
lerna link 链接互相引用的库
lerna create 新建package
lerna publish 发布

1.2.3 文件 #

1.2.3.1 package.json #
{
  "name": "root",
  "private": true,
  "devDependencies": {
    "lerna": "^4.0.0"
  }
}
1.2.3.2 lerna.json #
{
  "packages": [
    "packages/*"
  ],
  "version": "0.0.0"
}
1.2.3.3 .gitignore #
node_modules
.DS_Store
design
*.log
packages/test
dist
temp
.vuerc
.version
.versions
.changelog

1.2.4 yarn workspace #

1.2.4.1 package.json #

package.json

{
  "name": "root",
  "private": true,
+  "workspaces": [
+    "packages/*"
+  ],
  "devDependencies": {
    "lerna": "^4.0.0"
  }
}
1.2.4.2 lerna.json #

lerna.json

{
  "packages": [
    "packages/*"
  ],
  "version": "1.0.0",
+ "useWorkspaces": true,
+ "npmClient": "yarn"
}
1.2.4.3 添加依赖 #

设置加速镜像

yarn config set registry http://registry.npm.taobao.org
 npm config set registry https://registry.npm.taobao.org
作用 命令
查看工作空间信息 yarn workspaces info
给根空间添加依赖 yarn add chalk cross-spawn fs-extra --ignore-workspace-root-check
给某个项目添加依赖 yarn workspace create-react-app3 add commander
删除所有的 node_modules lerna clean 等于 yarn workspaces run clean
安装和link yarn install 等于 lerna bootstrap --npm-client yarn --use-workspaces
重新获取所有的 node_modules yarn install --force
查看缓存目录 yarn cache dir
清除本地缓存 yarn cache clean

1.2.5 创建子项目 #

lerna create zhang-cli
lerna create  zhang-cli-shared-utils
1.2.5.1 zhang-cli #
1.2.5.1.1 package.json #

packages\zhang-cli\bin\vue.js

{
  "name": "zhang-cli",
  "version": "0.0.0",
  "description": "zhang-cli",
  "author": "zhangrenyang <zhang_renyang@126.com>",
  "homepage": "",
  "license": "MIT",
  "main": "bin/vue.js"
}
1.2.5.1.2 vue.js #

packages\zhang-cli\bin\vue.js

#!/usr/bin/env node
console.log('vue cli');
1.2.5.2 zhang-cli-shared-utils #
1.2.5.2.1 package.json #

packages\zhang-cli-shared-utils\package.json

{
  "name": "zhang-cli-shared-utils",
  "version": "0.0.0",
  "description": "zhang-cli-shared-utils",
  "author": "zhangrenyang <zhang_renyang@126.com>",
  "homepage": "",
  "license": "MIT",
  "main": "index.js"
}
1.2.5.2.2 index.js #

packages\zhang-cli-shared-utils\index.js


1.2.6 创建软链接 #

yarn
cd packages/zhang-cli
npm link
npm root -g
zhang-cli

1.2.7 create命令 #

{
  "name": "root",
  "private": true,
  "workspaces": [
    "packages/*"
  ],
  "devDependencies": {
    "lerna": "^4.0.0"
  },
  "scripts": {
+   "create": "node ./packages/zhang-cli/bin/vue.js create hello1"
  }
}

1.2.8 调试命令 #

.vscode\launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "node",
            "request": "launch",
            "name": "vue-cli",
            "cwd":"${workspaceFolder}",
            "runtimeExecutable": "npm",
            "runtimeArgs": [
                "run",
                "create"
            ],
            "port":9229,
            "autoAttachChildProcesses": true,
            "stopOnEntry": true,
            "skipFiles": [
                "<node_internals>/**"
            ]
        }
    ]
}

1.3 安装依赖 #

npm config set registry=https://registry.npm.taobao.org
yarn config set registry https://registry.npm.taobao.org

cd packages/zhang-cli-shared-utils
yarn workspace zhang-cli-shared-utils add  chalk execa

cd packages/zhang-cli
yarn workspace zhang-cli add  zhang-cli-shared-utils commander inquirer execa chalk ejs globby  lodash.clonedeep fs-extra ora isbinaryfile 

1.4 lerna vs yarn #

1.4 commander.js #

#!/usr/bin/env node
const program = require('commander');
program
    .version(`zhang-cli 0.0.0}`)
    .usage('<command> [options]')

program
    .command('create <app-name>')
    .description('create a new project powered by vue-cli-service')
    .action((name) => {
        console.log(name);
    })

program.parse(process.argv)
node 1.2.commander.js
Usage: 1.2.commander <command> [options]

Options:
  -V, --version      output the version number
  -h, --help         display help for command

Commands:
  create <app-name>  create a new project powered by vue-cli-service
  help [command]     display help for command

node 1.2.commander.js create hello  

1.5 Inquirer.js #

const inquirer = require('inquirer')
const isManualMode = answers => answers.preset === '__manual__';
let defaultPreset = {
    useConfigFiles: false,
    cssPreprocessor: undefined,
    plugins: {
        '@vue/cli-plugin-babel': {},
        '@vue/cli-plugin-eslint': {
            config: 'base',
            lintOn: ['save']
        }
    }
}
let presets = {
    'default': Object.assign({ vueVersion: '2' }, defaultPreset),
    '__default_vue_3__': Object.assign({ vueVersion: '3' }, defaultPreset)
}
const presetChoices = Object.entries(presets).map(([name, preset]) => {
    let displayName = name
    if (name === 'default') {
        displayName = 'Default'
    } else if (name === '__default_vue_3__') {
        displayName = 'Default (Vue 3)'
    }
    return {
        name: `${displayName}`,
        value: name
    }
})
const presetPrompt = {
    name: 'preset',
    type: 'list',
    message: `Please pick a preset:`,
    choices: [
        ...presetChoices,
        {
            name: 'Manually select features',
            value: '__manual__'
        }
    ]
}
let features = [
    'vueVersion',
    'babel',
    'typescript',
    'pwa',
    'router',
    'vuex',
    'cssPreprocessors',
    'linter',
    'unit',
    'e2e'
];
const featurePrompt = {
    name: 'features',
    when: isManualMode,
    type: 'checkbox',
    message: 'Check the features needed for your project:',
    choices: features,
    pageSize: 10
}
const prompts = [
    presetPrompt,
    featurePrompt
]

;(async function(){
 let result = await inquirer.prompt(prompts);
 console.log(result);
})();

1.6 execa #

const execa = require('execa');

(async () => {
    const {stdout} = await execa('echo', ['hello']);
    console.log(stdout);
})();

1.7 chalk #

const chalk = require('chalk');
console.log(chalk.blue('Hello world!'));

1.8 ejs #

1.8.1 main.js #

template\main.js

<%_ if (rootOptions.vueVersion === '3') { _%>
  import { createApp } from 'vue'
  import App from './App.vue'
  createApp(App).mount('#app')
<%_ } else { _%>
  import Vue from 'vue'
  import App from './App.vue'
  Vue.config.productionTip = false
  new Vue({
    render: h => h(App),
  }).$mount('#app')
<%_ } _%>

1.8.2 components #

doc\template\components

<template>
  <h1>HelloWorld</h1>
</template>

<script>
export default {
  name: 'HelloWorld'
}
</script>

1.8.3 ejs.js #

doc\1.7.ejs.js

const path = require('path');
const fs = require('fs');
const ejs = require('ejs');
const globby = require('globby')
const slash = require('slash')
let source = path.join(__dirname, 'template');
;(async function () {
    const _files = await globby(['**/*'], { cwd: source })
    let files = {};
    for (const rawPath of _files) {
        const sourcePath = slash(path.resolve(source, rawPath))
        const template = fs.readFileSync(sourcePath, 'utf8')
        const content = ejs.render(template, {
            rootOptions: { vueVersion: '2' }
        })
        files[sourcePath] = content;
    }
    console.log(files);
})();

1.9 isbinaryfile #

const path = require('path');
const { isBinaryFileSync } = require('isbinaryfile');
let logo = path.join(__dirname,'template/assets/logo.png');
let isBinary = isBinaryFileSync(logo);
console.log(isBinary);
let main = path.join(__dirname,'template/main.js');
isBinary = isBinaryFileSync(main);
console.log(isBinary);

1.10 ora #

const ora = require('ora')
const spinner = ora()

exports.logWithSpinner = (msg) => {
    spinner.text = msg
    spinner.start();
}

exports.stopSpinner = () => {
    spinner.stop();
}

exports.logWithSpinner('npm install');
setTimeout(()=>{
    exports.stopSpinner();
},3000);

2.核心概念 #

2.1 插件 #

2.3 预设 #

exports.defaultPreset = {
  useConfigFiles: false,
  cssPreprocessor: undefined,
  plugins: {
    '@vue/cli-plugin-babel': {},
    '@vue/cli-plugin-eslint': {
      config: 'base',
      lintOn: ['save']
    }
  }
}

2.4 特性 #

2.5 create #

589f4d15c7d8574f847e57ef0e0d2191

3.参数解析 #

3.1 vue.js #

packages\zhang-cli\bin\vue.js

#!/usr/bin/env node
const program = require('commander');
program
    .version(`@vue/zhang-cli ${require('../package').version}`)
    .usage('<command> [options]')

program
    .command('create <app-name>')
    .description('create a new project powered by vue-cli-service')
    .action((name) => {
        require('../lib/create')(name)
    })

program.parse(process.argv)

3.2 create.js #

packages\zhang-\lib\create.js

const path = require('path');
async function create(projectName, options) {
  const cwd = process.cwd();
  const name = projectName;
  const targetDir = path.resolve(cwd, projectName);
  console.log(name);
  console.log(targetDir);
}

module.exports = (...args) => {
  return create(...args).catch(err => {
    console.log(err);
  })
}

4.获取预设 #

4.1 create.js #

packages\zhang-cli\lib\create.js

const path = require('path');
+const Creator = require('./Creator');
+const { getPromptModules } = require('./util/createTools')
async function create(projectName) {
  const cwd = process.cwd();
  const name = projectName;
  const targetDir = path.resolve(cwd, projectName);
+ const promptModules = getPromptModules();
+ const creator = new Creator(name, targetDir,promptModules);
+ await creator.create();
}

module.exports = (...args) => {
  return create(...args).catch(err => {
    console.log(err);
  })
}

4.2 options.js #

packages\zhang-cli\lib\options.js

exports.defaultPreset = {
  useConfigFiles: false,
  cssPreprocessor: undefined,
  plugins: {
    '@vue/cli-plugin-babel': {},
    '@vue/cli-plugin-eslint': {
      config: 'base',
      lintOn: ['save']
    }
  }
}

exports.defaults = {
  presets: {
    'default': Object.assign({ vueVersion: '2' }, exports.defaultPreset),
    '__default_vue_3__': Object.assign({ vueVersion: '3' }, exports.defaultPreset)
  }
}

4.3 PromptModuleAPI.js #

packages\zhang-cli\lib\PromptModuleAPI.js

class PromptModuleAPI {
    constructor(creator) {
        this.creator = creator
    }

    injectFeature(feature) {
        this.creator.featurePrompt.choices.push(feature)
    }

    injectPrompt(prompt) {
        this.creator.injectedPrompts.push(prompt)
    }

    onPromptComplete(cb) {
        this.creator.promptCompleteCbs.push(cb)
    }
}
module.exports = PromptModuleAPI;

4.4 createTools.js #

packages\zhang-cli\lib\util\createTools.js

exports.getPromptModules = () => {
    return [
        'vueVersion'
    ].map(file => require(`../promptModules/${file}`))
}

4.5 vueVersion.js #

packages\zhang-cli\lib\promptModules\vueVersion.js

module.exports = cli => {
  //cli.injectFeature 是注入 featurePrompt,即初始化项目时选择 babel,typescript,pwa 等等
  cli.injectFeature({
    name: 'Choose Vue version',
    value: 'vueVersion',
    description: 'Choose a version of Vue.js that you want to start the project with',
    checked: true
  })
  //cli.injectPrompt 是根据选择的 featurePrompt 然后注入对应的 prompt,当选择了 unit,接下来会有以下的 prompt,选择 Mocha + Chai 还是 Jest
  cli.injectPrompt({
    name: 'vueVersion',
    when: answers => answers.features.includes('vueVersion'),
    message: 'Choose a version of Vue.js that you want to start the project with',
    type: 'list',
    choices: [
      {
        name: '2.x',
        value: '2'
      },
      {
        name: '3.x',
        value: '3'
      }
    ],
    default: '2'
  })
  //cli.onPromptComplete 就是一个回调,会根据选择来添加对应的插件, 当选择了 mocha ,那么就会添加 @vue/cli-plugin-unit-mocha 插件
  cli.onPromptComplete((answers, options) => {
    if (answers.vueVersion) {
      options.vueVersion = answers.vueVersion
    }
  })
}

4.6 Creator.js #

packages\zhang-cli\lib\Creator.js

const { defaults } = require('./options');
const PromptModuleAPI = require('./PromptModuleAPI');
const inquirer = require('inquirer')
const isManualMode = answers => answers.preset === '__manual__'
class Creator {
    constructor(name, context, promptModules) {
        this.name = name;
        this.context = process.env.VUE_CLI_CONTEXT = context;
        const { presetPrompt, featurePrompt } = this.resolveIntroPrompts();
        this.presetPrompt = presetPrompt;
        this.featurePrompt = featurePrompt;
        this.injectedPrompts = []
        this.promptCompleteCbs = []
        const promptAPI = new PromptModuleAPI(this)
        promptModules.forEach(m => m(promptAPI))
    }
    async create() {
        let preset = await this.promptAndResolvePreset()
        console.log('preset', preset);
    }
    resolveFinalPrompts() {
        this.injectedPrompts.forEach(prompt => {
            const originalWhen = prompt.when || (() => true)
            prompt.when = answers => {
                return isManualMode(answers) && originalWhen(answers)
            }
        })
        const prompts = [
            this.presetPrompt,
            this.featurePrompt,
            ...this.injectedPrompts,
        ]
        return prompts
    }
    async promptAndResolvePreset(answers = null) {
        if (!answers) {
            answers = await inquirer.prompt(this.resolveFinalPrompts())
        }
        let preset;
        if (answers.preset && answers.preset !== '__manual__') {
            preset = await this.resolvePreset(answers.preset)
        } else {
            preset = {
                plugins: {}
            }
            answers.features = answers.features || []
            this.promptCompleteCbs.forEach(cb => cb(answers, preset))
        }
        return preset
    }
    async resolvePreset (name) {
        const savedPresets = this.getPresets()
        return savedPresets[name];
    }
    getPresets() {
        return Object.assign({}, defaults.presets)
    }
    resolveIntroPrompts() {
        const presets = this.getPresets()
        const presetChoices = Object.entries(presets).map(([name]) => {
            let displayName = name
            if (name === 'default') {
                displayName = 'Default'
            } else if (name === '__default_vue_3__') {
                displayName = 'Default (Vue 3)'
            }
            return {
                name: `${displayName}`,
                value: name
            }
        })
        const presetPrompt = {
            name: 'preset',
            type: 'list',
            message: `Please pick a preset:`,
            choices: [
                ...presetChoices,
                {
                    name: 'Manually select features',
                    value: '__manual__'
                }
            ]
        }
        const featurePrompt = {
            name: 'features',
            when: isManualMode,
            type: 'checkbox',
            message: 'Check the features needed for your project:',
            choices: [],
            pageSize: 10
        }
        return {
            presetPrompt,
            featurePrompt
        }
    }
}
module.exports = Creator;

5.写入package.json #

5.1 cli-shared-utils\index.js #

packages\zhang-cli-shared-utils\index.js

exports.chalk = require('chalk')

5.2 Creator.js #

packages\zhang-cli\lib\Creator.js

const { defaults } = require('./options');
const PromptModuleAPI = require('./PromptModuleAPI');
const inquirer = require('inquirer')
+const cloneDeep = require('lodash.clonedeep')
+const writeFileTree = require('./util/writeFileTree')
+const { chalk } = require('zhang-cli-shared-utils')
const isManualMode = answers => answers.preset === '__manual__'
class Creator {
    constructor(name, context, promptModules) {
        this.name = name;
        this.context = process.env.VUE_CLI_CONTEXT = context;
        const { presetPrompt, featurePrompt } = this.resolveIntroPrompts();
        this.presetPrompt = presetPrompt;
        this.featurePrompt = featurePrompt;
        this.injectedPrompts = []
        this.promptCompleteCbs = []
        const promptAPI = new PromptModuleAPI(this)
        promptModules.forEach(m => m(promptAPI))
    }
    async create() {
+       const {name,context} = this;
        let preset = await this.promptAndResolvePreset()
        console.log('preset', preset);
+       preset = cloneDeep(preset);
+       preset.plugins['@vue/cli-service'] = Object.assign({projectName: name}, preset);
+       console.log(`✨  Creating project in ${chalk.yellow(context)}.`)
+       const pkg = {
+           name,
+           version: '0.1.0',
+           private: true,
+           devDependencies: {}
+       }
+       const deps = Object.keys(preset.plugins)
+       deps.forEach(dep => {
+           pkg.devDependencies[dep] = 'latest';
+       })
+       await writeFileTree(context, {
+           'package.json': JSON.stringify(pkg, null, 2)
+       })
    }
    resolveFinalPrompts() {
        this.injectedPrompts.forEach(prompt => {
            const originalWhen = prompt.when || (() => true)
            prompt.when = answers => {
                return isManualMode(answers) && originalWhen(answers)
            }
        })
        const prompts = [
            this.presetPrompt,
            this.featurePrompt,
            ...this.injectedPrompts,
        ]
        return prompts
    }
    async promptAndResolvePreset(answers = null) {
        if (!answers) {
            answers = await inquirer.prompt(this.resolveFinalPrompts())
        }
        let preset;
        if (answers.preset && answers.preset !== '__manual__') {
            preset = await this.resolvePreset(answers.preset)
        } else {
            preset = {
                plugins: {}
            }
            answers.features = answers.features || []
            this.promptCompleteCbs.forEach(cb => cb(answers, preset))
        }
        return preset
    }
    async resolvePreset (name) {
        const savedPresets = this.getPresets()
        return savedPresets[name];
    }
    getPresets() {
        return Object.assign({}, defaults.presets)
    }
    resolveIntroPrompts() {
        const presets = this.getPresets()
        const presetChoices = Object.entries(presets).map(([name]) => {
            let displayName = name
            if (name === 'default') {
                displayName = 'Default'
            } else if (name === '__default_vue_3__') {
                displayName = 'Default (Vue 3)'
            }
            return {
                name: `${displayName}`,
                value: name
            }
        })
        const presetPrompt = {
            name: 'preset',
            type: 'list',
            message: `Please pick a preset:`,
            choices: [
                ...presetChoices,
                {
                    name: 'Manually select features',
                    value: '__manual__'
                }
            ]
        }
        const featurePrompt = {
            name: 'features',
            when: isManualMode,
            type: 'checkbox',
            message: 'Check the features needed for your project:',
            choices: [],
            pageSize: 10
        }
        return {
            presetPrompt,
            featurePrompt
        }
    }
}


module.exports = Creator;

5.3 writeFileTree.js #

packages\zhang-cli\lib\util\writeFileTree.js

const fs = require('fs-extra')
const path = require('path')
module.exports = async function writeFileTree(dir, files) {
  Object.keys(files).forEach((name) => {
    const filePath = path.join(dir, name)
    fs.ensureDirSync(path.dirname(filePath))
    fs.writeFileSync(filePath, files[name])
  })
}

6.安装依赖 #

6.1 Creator.js #

packages\zhang-cli\lib\Creator.js

const { defaults } = require('./options');
const PromptModuleAPI = require('./PromptModuleAPI');
const inquirer = require('inquirer')
const cloneDeep = require('lodash.clonedeep')
const writeFileTree = require('./util/writeFileTree')
+const { chalk, execa } = require('zhang-cli-shared-utils')
const isManualMode = answers => answers.preset === '__manual__'
class Creator {
    constructor(name, context, promptModules) {
        this.name = name;
        this.context = process.env.VUE_CLI_CONTEXT = context;
        const { presetPrompt, featurePrompt } = this.resolveIntroPrompts();
        this.presetPrompt = presetPrompt;
        this.featurePrompt = featurePrompt;
        this.injectedPrompts = []
        this.promptCompleteCbs = []
+       this.run = this.run.bind(this)//运行函数
        const promptAPI = new PromptModuleAPI(this)
        promptModules.forEach(m => m(promptAPI))
    }
+   run(command, args) {
+       return execa(command, args, { cwd: this.context })
+   }
    async create() {
+       const {name,context,run} = this;
        let preset = await this.promptAndResolvePreset()
        console.log('preset', preset);
        preset = cloneDeep(preset);
        preset.plugins['@vue/cli-service'] = Object.assign({projectName: name}, preset);
        console.log(`✨  Creating project in ${chalk.yellow(context)}.`)
        const pkg = {
            name,
            version: '0.1.0',
            private: true,
            devDependencies: {}
        }
        const deps = Object.keys(preset.plugins)
        deps.forEach(dep => {
            pkg.devDependencies[dep] = 'latest';
        })
        await writeFileTree(context, {
            'package.json': JSON.stringify(pkg, null, 2)
        })
+       console.log(`🗃  Initializing git repository...`)
+       await run('git init');
+       console.log(`⚙\u{fe0f} Installing CLI plugins. This might take a while...`)
+       await run('npm install');
    }
    resolveFinalPrompts() {
        this.injectedPrompts.forEach(prompt => {
            const originalWhen = prompt.when || (() => true)
            prompt.when = answers => {
                return isManualMode(answers) && originalWhen(answers)
            }
        })
        const prompts = [
            this.presetPrompt,
            this.featurePrompt,
            ...this.injectedPrompts,
        ]
        return prompts
    }
    async promptAndResolvePreset(answers = null) {
        if (!answers) {
            answers = await inquirer.prompt(this.resolveFinalPrompts())
        }
        let preset;
        if (answers.preset && answers.preset !== '__manual__') {
            preset = await this.resolvePreset(answers.preset)
        } else {
            preset = {
                plugins: {}
            }
            answers.features = answers.features || []
            this.promptCompleteCbs.forEach(cb => cb(answers, preset))
        }
        return preset
    }
    async resolvePreset (name) {
        const savedPresets = this.getPresets()
        return savedPresets[name];
    }
    getPresets() {
        return Object.assign({}, defaults.presets)
    }
    resolveIntroPrompts() {
        const presets = this.getPresets()
        const presetChoices = Object.entries(presets).map(([name]) => {
            let displayName = name
            if (name === 'default') {
                displayName = 'Default'
            } else if (name === '__default_vue_3__') {
                displayName = 'Default (Vue 3)'
            }
            return {
                name: `${displayName}`,
                value: name
            }
        })
        const presetPrompt = {
            name: 'preset',
            type: 'list',
            message: `Please pick a preset:`,
            choices: [
                ...presetChoices,
                {
                    name: 'Manually select features',
                    value: '__manual__'
                }
            ]
        }
        const featurePrompt = {
            name: 'features',
            when: isManualMode,
            type: 'checkbox',
            message: 'Check the features needed for your project:',
            choices: [],
            pageSize: 10
        }
        return {
            presetPrompt,
            featurePrompt
        }
    }
}


module.exports = Creator;

7.实现插件机制 #

4a36deaf32188b9303b71a0f2936c043

7.1 Creator.js #

packages\zhang-cli\lib\Creator.js

const { defaults } = require('./options');
const PromptModuleAPI = require('./PromptModuleAPI');
const inquirer = require('inquirer')
const cloneDeep = require('lodash.clonedeep')
const writeFileTree = require('./util/writeFileTree')
+const { chalk, execa,loadModule } = require('zhang-cli-shared-utils')
+const Generator = require('./Generator')
const isManualMode = answers => answers.preset === '__manual__'
class Creator {
    constructor(name, context, promptModules) {
        this.name = name;
        this.context = process.env.VUE_CLI_CONTEXT = context;
        const { presetPrompt, featurePrompt } = this.resolveIntroPrompts();
        this.presetPrompt = presetPrompt;
        this.featurePrompt = featurePrompt;
        this.injectedPrompts = []
        this.promptCompleteCbs = []
        this.run = this.run.bind(this)//运行函数
        const promptAPI = new PromptModuleAPI(this)
        promptModules.forEach(m => m(promptAPI))
    }
    run(command, args) {
        return execa(command, args, { cwd: this.context })
    }
    async create() {
        const {name,context,run} = this;
        let preset = await this.promptAndResolvePreset()
        console.log('preset', preset);
        preset = cloneDeep(preset);
        preset.plugins['@vue/cli-service'] = Object.assign({projectName: name}, preset);
        console.log(`✨  Creating project in ${chalk.yellow(context)}.`)
        const pkg = {
            name,
            version: '0.1.0',
            private: true,
            devDependencies: {}
        }
        const deps = Object.keys(preset.plugins)
        deps.forEach(dep => {
            pkg.devDependencies[dep] = 'latest';
        })
        await writeFileTree(context, {
            'package.json': JSON.stringify(pkg, null, 2)
        })
        console.log(`🗃  Initializing git repository...`)
        await run('git init');
        console.log(`⚙\u{fe0f} Installing CLI plugins. This might take a while...`)
        await run('npm install');
+       console.log(`🚀  Invoking generators...`)
+       const plugins = await this.resolvePlugins(preset.plugins)
+       const generator = new Generator(context, {pkg,plugins})
+       await generator.generate();
    }
+   async resolvePlugins(rawPlugins) {
+       const plugins = []
+       for (const id of Object.keys(rawPlugins)) {
+           try{
+               const apply = loadModule(`${id}/generator`, this.context) || (() => {})
+               let options = rawPlugins[id] || {}
+               plugins.push({ id, apply, options })
+           }catch(error){
+               console.log(error);
+           } 
+       }
+       return plugins
+   }
    resolveFinalPrompts() {
        this.injectedPrompts.forEach(prompt => {
            const originalWhen = prompt.when || (() => true)
            prompt.when = answers => {
                return isManualMode(answers) && originalWhen(answers)
            }
        })
        const prompts = [
            this.presetPrompt,
            this.featurePrompt,
            ...this.injectedPrompts,
        ]
        return prompts
    }
    async promptAndResolvePreset(answers = null) {
        if (!answers) {
            answers = await inquirer.prompt(this.resolveFinalPrompts())
        }
        let preset;
        if (answers.preset && answers.preset !== '__manual__') {
            preset = await this.resolvePreset(answers.preset)
        } else {
            preset = {
                plugins: {}
            }
            answers.features = answers.features || []
            this.promptCompleteCbs.forEach(cb => cb(answers, preset))
        }
        return preset
    }
    async resolvePreset (name) {
        const savedPresets = this.getPresets()
        return savedPresets[name];
    }
    getPresets() {
        return Object.assign({}, defaults.presets)
    }
    resolveIntroPrompts() {
        const presets = this.getPresets()
        const presetChoices = Object.entries(presets).map(([name]) => {
            let displayName = name
            if (name === 'default') {
                displayName = 'Default'
            } else if (name === '__default_vue_3__') {
                displayName = 'Default (Vue 3)'
            }
            return {
                name: `${displayName}`,
                value: name
            }
        })
        const presetPrompt = {
            name: 'preset',
            type: 'list',
            message: `Please pick a preset:`,
            choices: [
                ...presetChoices,
                {
                    name: 'Manually select features',
                    value: '__manual__'
                }
            ]
        }
        const featurePrompt = {
            name: 'features',
            when: isManualMode,
            type: 'checkbox',
            message: 'Check the features needed for your project:',
            choices: [],
            pageSize: 10
        }
        return {
            presetPrompt,
            featurePrompt
        }
    }
}
module.exports = Creator;

7.2 cli-shared-utils\index.js #

packages\zhang-cli-shared-utils\index.js

+['pluginResolution','module'].forEach(m => {
+    Object.assign(exports, require(`./lib/${m}`))
+})
exports.chalk = require('chalk')
exports.execa = require('execa')

7.3 module.js #

packages\zhang-cli-shared-utils\lib\module.js

const Module = require('module')
const path = require('path')

exports.loadModule = function (request, context) {
    return Module.createRequire(path.resolve(context, 'package.json'))(request)
}

7.4 pluginResolution.js #

packages\zhang-cli-shared-utils\lib\pluginResolution.js

const pluginRE = /^@vue\/cli-plugin-/
exports.toShortPluginId = id => id.replace(pluginRE, '');//@vue/cli-plugin-babel => babel
exports.isPlugin = id => pluginRE.test(id)
exports.matchesPluginId = (input, full) => {
    return full === input;
}

7.5 mergeDeps.js #

packages\zhang-cli\lib\util\mergeDeps.js

function mergeDeps(sourceDeps, depsToInject) {
  const result = Object.assign({}, sourceDeps)
  for (const depName in depsToInject) {
    result[depName] = depsToInject[depName];
  }
  return result
}

module.exports = mergeDeps;

7.6 normalizeFilePaths.js #

packages\zhang-cli\lib\util\normalizeFilePaths.js

const slash = require('slash')
module.exports = function normalizeFilePaths (files) {
  Object.keys(files).forEach(file => {
    const normalized = slash(file)
    if (file !== normalized) {
      files[normalized] = files[file]
      delete files[file]
    }
  })
  return files
}

7.7 GeneratorAPI.js #

packages\zhang-cli\lib\GeneratorAPI.js

const { toShortPluginId } = require('zhang-cli-shared-utils')
const mergeDeps = require('./util/mergeDeps')
const { isBinaryFileSync } = require('isbinaryfile')
const isString = val => typeof val === 'string'
const isObject = val => val && typeof val === 'object'
const path = require('path');
const fs = require('fs');
const ejs = require('ejs');
class GeneratorAPI {
    constructor(id, generator, options, rootOptions) {
        this.id = id
        this.generator = generator
        this.options = options
        this.rootOptions = rootOptions
        this.pluginsData = generator.plugins
            .filter(({ id }) => id !== `@vue/cli-service`)
            .map(({ id }) => ({ name: toShortPluginId(id) }))
    }
    hasPlugin(id) {
        return this.generator.hasPlugin(id)
    }
    extendPackage(fields) {
        const pkg = this.generator.pkg
        const toMerge = fields
        for (const key in toMerge) {
            const value = toMerge[key]
            const existing = pkg[key]
            if (isObject(value) && (key === 'dependencies' || key === 'devDependencies')) {
                pkg[key] = mergeDeps(existing || {}, value)
            } else {
                pkg[key] = value
            }
        }
    }
    _injectFileMiddleware(middleware) {
        this.generator.fileMiddlewares.push(middleware)
    }
    _resolveData(additionalData) {
        return Object.assign({
            options: this.options,
            rootOptions: this.rootOptions,
            plugins: this.pluginsData
          }, additionalData)
    }
    render(source,additionalData) {
        const baseDir = extractCallDir()
        if (isString(source)) {
            source = path.resolve(baseDir, source)
            this._injectFileMiddleware(async (files) => {
                const data = this._resolveData(additionalData)
                const globby = require('globby')
                const _files = await globby(['**/*'], { cwd: source })
                for (const rawPath of _files) {
                    const targetPath = rawPath.split('/').map(filename => {
                        if (filename.charAt(0) === '_' && filename.charAt(1) !== '_') {
                            return `.${filename.slice(1)}`
                        }
                        return filename
                    }).join('/')
                    const sourcePath = path.resolve(source, rawPath)
                    const content = renderFile(sourcePath, data)
                    files[targetPath] = content;
                }
            })
        }
    }
}
function extractCallDir() {
    const obj = {}
    Error.captureStackTrace(obj)
    const callSite = obj.stack.split('\n')[3]
    const namedStackRegExp = /\s\((.*):\d+:\d+\)$/
    let matchResult = callSite.match(namedStackRegExp)
    const fileName = matchResult[1]
    return path.dirname(fileName)
}
function renderFile(name, data) {
    if (isBinaryFileSync(name)) {
        return fs.readFileSync(name)
    }
    const template = fs.readFileSync(name, 'utf8')
    return ejs.render(template, data)
}
module.exports = GeneratorAPI

7.8 Generator.js #

packages\zhang-cli\lib\Generator.js

const { isPlugin,matchesPluginId } = require('zhang-cli-shared-utils')
const GeneratorAPI = require('./GeneratorAPI')
const normalizeFilePaths = require('./util/normalizeFilePaths')
const writeFileTree = require('./util/writeFileTree')
const ejs = require('ejs')
class Generator {
    constructor(context, { pkg = {}, plugins = [] } = {}) {
        this.context = context
        this.plugins = plugins
        this.files = {}
        this.fileMiddlewares = []
        this.pkg = pkg;
        this.allPluginIds = Object.keys(this.pkg.dependencies || {})
            .concat(Object.keys(this.pkg.devDependencies || {}))
            .filter(isPlugin)
        const cliService = plugins.find(p => p.id === '@vue/cli-service')
        this.rootOptions = cliService.options;
    }
    async generate() {
        await this.initPlugins()
        //将一些配置信息从package.json中提取到单独的文件中,比如postcss.config.js babel.config.js
        this.extractConfigFiles()
        //遍历fileMiddleware,向files里写入文件,并插入import和rootOptions
        await this.resolveFiles()
        console.log(this.files);
        this.sortPkg()
        this.files['package.json'] = JSON.stringify(this.pkg, null, 2) + '\n'
        //把内存中的文件写入硬盘
        await writeFileTree(this.context, this.files)
    }
    sortPkg() {
        console.log('ensure package.json keys has readable order');
    }
    async resolveFiles() {
        const files = this.files
        for (const middleware of this.fileMiddlewares) {
            await middleware(files, ejs.render)
        }
        normalizeFilePaths(files)
    }
    extractConfigFiles() {
        console.log('extractConfigFiles');
    }
    async initPlugins() {
        const { rootOptions } = this
        for (const plugin of this.plugins) {
            const { id, apply, options } = plugin
            const api = new GeneratorAPI(id, this, options, rootOptions)
            await apply(api, options, rootOptions)
        }
    }
    hasPlugin(_id) {
        return [
          ...this.plugins.map(p => p.id),
          ...this.allPluginIds
        ].some(id => {
          return matchesPluginId(_id, id);
        })
      }
}
module.exports = Generator;

8.完成create命令 #

8.1 Creator.js #

packages\zhang-cli\lib\Creator.js

const { defaults } = require('./options');
const PromptModuleAPI = require('./PromptModuleAPI');
const inquirer = require('inquirer')
const cloneDeep = require('lodash.clonedeep')
const writeFileTree = require('./util/writeFileTree')
const { chalk, execa,loadModule } = require('zhang-cli-shared-utils')
const Generator = require('./Generator')
const isManualMode = answers => answers.preset === '__manual__'
class Creator {
    constructor(name, context, promptModules) {
        this.name = name;
        this.context = process.env.VUE_CLI_CONTEXT = context;
        const { presetPrompt, featurePrompt } = this.resolveIntroPrompts();
        this.presetPrompt = presetPrompt;
        this.featurePrompt = featurePrompt;
        this.injectedPrompts = []
        this.promptCompleteCbs = []
        this.run = this.run.bind(this)//运行函数
        const promptAPI = new PromptModuleAPI(this)
        promptModules.forEach(m => m(promptAPI))
    }
    run(command, args) {
        return execa(command, args, { cwd: this.context })
    }
    async create() {
        const {name,context,run} = this;
        let preset = await this.promptAndResolvePreset()
        console.log('preset', preset);
        preset = cloneDeep(preset);
        preset.plugins['@vue/cli-service'] = Object.assign({projectName: name}, preset);
        console.log(`✨  Creating project in ${chalk.yellow(context)}.`)
        const pkg = {
            name,
            version: '0.1.0',
            private: true,
            devDependencies: {}
        }
        const deps = Object.keys(preset.plugins)
        deps.forEach(dep => {
            pkg.devDependencies[dep] = 'latest';
        })
        await writeFileTree(context, {
            'package.json': JSON.stringify(pkg, null, 2)
        })
        console.log(`🗃  Initializing git repository...`)
        await run('git init');
        console.log(`⚙\u{fe0f} Installing CLI plugins. This might take a while...`)
        await run('npm install');
        console.log(`🚀  Invoking generators...`)
        const plugins = await this.resolvePlugins(preset.plugins)
        const generator = new Generator(context, {pkg,plugins})
        await generator.generate();
+       console.log(`📦  Installing additional dependencies...`)
+       await run('npm install');
+       console.log('📄  Generating README.md...')
+       await writeFileTree(context, {
+           'README.md': `cd ${name}\n npm run serve`
+       })
+       await run('git', ['add', '-A'])
+       await run('git', ['commit', '-m', 'created', '--no-verify'])
+       console.log(`🎉  Successfully created project ${chalk.yellow(name)}.`)
+       console.log(
+           `👉  Get started with the following commands:\n\n` +
+           (chalk.cyan(`cd ${name}\n`)) +
+           (chalk.cyan(`npm run serve`))
+       )
+       generator.printExitLogs()
    }
    //遍历插件的generator,插件通过GeneratorAPI向package.json中加入依赖或字段,并通过render准备添加文件
    async resolvePlugins(rawPlugins) {
        const plugins = []
        for (const id of Object.keys(rawPlugins)) {
            try{
                const apply = loadModule(`${id}/generator`, this.context) || (() => {})
                let options = rawPlugins[id] || {}
                plugins.push({ id, apply, options })
            }catch(error){
                console.log(error);
            } 
        }
        return plugins
    }
    resolveFinalPrompts() {
        this.injectedPrompts.forEach(prompt => {
            const originalWhen = prompt.when || (() => true)
            prompt.when = answers => {
                return isManualMode(answers) && originalWhen(answers)
            }
        })
        const prompts = [
            this.presetPrompt,
            this.featurePrompt,
            ...this.injectedPrompts,
        ]
        return prompts
    }
    async promptAndResolvePreset(answers = null) {
        if (!answers) {
            answers = await inquirer.prompt(this.resolveFinalPrompts())
        }
        let preset;
        if (answers.preset && answers.preset !== '__manual__') {
            preset = await this.resolvePreset(answers.preset)
        } else {
            preset = {
                plugins: {}
            }
            answers.features = answers.features || []
            this.promptCompleteCbs.forEach(cb => cb(answers, preset))
        }
        return preset
    }
    async resolvePreset (name) {
        const savedPresets = this.getPresets()
        return savedPresets[name];
    }
    getPresets() {
        return Object.assign({}, defaults.presets)
    }
    resolveIntroPrompts() {
        const presets = this.getPresets()
        const presetChoices = Object.entries(presets).map(([name]) => {
            let displayName = name
            if (name === 'default') {
                displayName = 'Default'
            } else if (name === '__default_vue_3__') {
                displayName = 'Default (Vue 3)'
            }
            return {
                name: `${displayName}`,
                value: name
            }
        })
        const presetPrompt = {
            name: 'preset',
            type: 'list',
            message: `Please pick a preset:`,
            choices: [
                ...presetChoices,
                {
                    name: 'Manually select features',
                    value: '__manual__'
                }
            ]
        }
        const featurePrompt = {
            name: 'features',
            when: isManualMode,
            type: 'checkbox',
            message: 'Check the features needed for your project:',
            choices: [],
            pageSize: 10
        }
        return {
            presetPrompt,
            featurePrompt
        }
    }
}


module.exports = Creator;

8.2 Generator.js #

packages\zhang-cli\lib\Generator.js

const { isPlugin,matchesPluginId } = require('zhang-cli-shared-utils')
const GeneratorAPI = require('./GeneratorAPI')
const normalizeFilePaths = require('./util/normalizeFilePaths')
const writeFileTree = require('./util/writeFileTree')
const ejs = require('ejs')
class Generator {
    constructor(context, { pkg = {}, plugins = [] } = {}) {
        this.context = context
        this.plugins = plugins
        this.files = {}
        this.fileMiddlewares = []
        this.pkg = pkg;
        this.allPluginIds = Object.keys(this.pkg.dependencies || {})
            .concat(Object.keys(this.pkg.devDependencies || {}))
            .filter(isPlugin)
        const cliService = plugins.find(p => p.id === '@vue/cli-service')
        this.rootOptions = cliService.options;
    }
    async generate() {
        await this.initPlugins()
        this.extractConfigFiles()
        await this.resolveFiles()
        this.sortPkg()
        this.files['package.json'] = JSON.stringify(this.pkg, null, 2) + '\n'
        await writeFileTree(this.context, this.files)
    }
    sortPkg() {
        console.log('ensure package.json keys has readable order');
    }
    async resolveFiles() {
        const files = this.files
        for (const middleware of this.fileMiddlewares) {
            await middleware(files, ejs.render)
        }
        normalizeFilePaths(files)
    }
    extractConfigFiles() {
        console.log('extractConfigFiles');
    }
    async initPlugins() {
        const { rootOptions } = this
        for (const plugin of this.plugins) {
            const { id, apply, options } = plugin
            const api = new GeneratorAPI(id, this, options, rootOptions)
            await apply(api, options, rootOptions)
        }
    }
    hasPlugin(_id) {
        return [
          ...this.plugins.map(p => p.id),
          ...this.allPluginIds
        ].some(id => {
          return matchesPluginId(_id, id);
        })
    }
+    printExitLogs(){
+        console.log('printExitLogs');
+    }
}

module.exports = Generator;