脚手架开发流程详解

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/sam/Desktop/vue-test

• 帮助文档：
  global help:
  Usage
  Options
  Commands
  示例：vue 的帮助信息

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

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                                      alias of "npm run serve" in the current project
  build                                      alias of "npm run build" in the current project
  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  outdated [options]                         (experimental) check for outdated vue cli service / plugins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
  help [command]                             display help for command

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

• command help
  Usage
  Options
  vue create的帮助信息：

Usage: vue 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                      display help for command

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…