开发流程

• 创建npm项目
• 创建脚手架入口文件，最上方添加：

#!/usr/bin/env node 

• 配置package.json，添加bin属性
• 编写脚手架代码
• 将脚手架发布到npm

使用流程

• 安装脚手架 npm install -g your-own-cli
• 使用脚手架 your-own-cli

脚手架开发难点解析

• 分包：将复杂的系统拆分成若干个模块
• 命令注册：

vue create
vue add
vue invoke

• 参数解析：

vue command [options] <params>

• options全称：--version、--help

• options简写：-V、-h

• 带params的options：--path /Users/caimengxin/Desktop/vue-test

• 帮助文档：

• • global help
• • • Usage
    • Options
    • Commands

• 示例：vue 的帮助信息：

Usage: vue <command> [options]

Options:
  -V, --version                              output the version number
  -h, --help                                 output usage information

Commands:
  create [options] <app-name>                create a new project powered by vue-cli-service
  add [options] <plugin> [pluginOptions]     install a plugin and invoke its generator in an already created project
  invoke [options] <plugin> [pluginOptions]  invoke the generator of a plugin in an already created project
  inspect [options] [paths...]               inspect the webpack config in a project with vue-cli-service
  serve [options] [entry]                    serve a .js or .vue file in development mode with zero config
  build [options] [entry]                    build a .js or .vue file in production mode with zero config
  ui [options]                               start and open the vue-cli ui
  init [options] <template> <app-name>       generate a project from a remote template (legacy API, requires @vue/cli-init)
  config [options] [value]                   inspect and modify the config
  outdated [options]                         (experimental) check for outdated vue cli service / plugins
  upgrade [options] [plugin-name]            (experimental) upgrade vue cli service / plugins
  migrate [options] [plugin-name]            (experimental) run migrator for an already-installed cli plugin
  info                                       print debugging information about your environment

  Run vue <command> --help for detailed usage of given command.

• command help

• • Usage
  • Options

vue create 的帮助信息

Usage: create [options] <app-name>

create a new project powered by vue-cli-service

Options:
  -p, --preset <presetName>       Skip prompts and use saved or remote preset
  -d, --default                   Skip prompts and use default preset
  -i, --inlinePreset <json>       Skip prompts and use inline JSON string as preset
  -m, --packageManager <command>  Use specified npm client when installing dependencies
  -r, --registry <url>            Use specified npm registry when installing dependencies (only for npm)
  -g, --git [message]             Force git initialization with initial commit message
  -n, --no-git                    Skip git initialization
  -f, --force                     Overwrite target directory if it exists
  --merge                         Merge target directory if it exists
  -c, --clone                     Use git clone when fetching remote preset
  -x, --proxy <proxyUrl>          Use specified proxy when creating project
  -b, --bare                      Scaffold project without beginner instructions
  --skipGetStarted                Skip displaying "Get started" instructions
  -h, --help                      output usage information

还有很多，比如：

• 命令行交互
• 日志打印
• 命令行文字变色
• 网络通信：HTTP、WebSocket
• 文件处理

等等......