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cmdjs

v0.0.14

Published

A cmd tool.

Downloads

18

Readme

cmdjs

A cmd tool.

Vision

To make the best framework to make a tool for cmd.

Quick Start

现在,我们就来尝试快速构建一个命令行工具。

本框架约定的术语

我们现来对该框架中提到的名称进行说明下,以下面一段命令为例:

mo create myGame --frameworks mo -o ./tmp
  • 命令名称:mo
  • 命令插件名称:create
  • 命令插件参数:myGame
  • 命令选项和选项值:--frameworks mo
  • 命令选项短名和选项值: -o ./tmp

项目结构

接下来,我们开始进行命令行工具项目的创建。项目目录结构如下:

my-cmd-tool
  +config
    -msg.json
    -option.json
    -plugin.json
  +plugin
  -bin.js
  -package.json
  1. config目录用于存放该命令行工具的各种配置。
  • msg.json用于配置提示信息。目的是将提示信息配置化,已达到今后进行国际化操作。
  • option.json用于配置全局的选项信息。例如--out选项。
  • plugin.json用于配置具体的插件信息。
  1. plugin目录用于存放具体的插件实现逻辑代码。该js文件名称即为插件名称(不区分大小写)。

  2. bin.js即为命令的启动入口js。

bin.js

#!/usr/bin/env node

var cmdJs = require("cmdjs");
cmdJs.bin({
    configDir : cmdJs.path2.join(__dirname, "config"),
    pluginDir : cmdJs.path2.join(__dirname, "plugin")
});

这里的代码极其简单,只要你保证项目目录结构按规范来,直接复制就可以了。

package.json

{
    "name": "my-cmd-tool",
    "version": "0.1.0",
    "bin" : {
        "mo" : "./bin.js"
    },
    "dependencies" : {
        "cmdjs" : "*"
    },
    "author" : {
        "name" : "SmallAiTT",
        "email" : "[email protected]"
    }
}

这是一段简单的nodejs模块配置。其中主要注意的只有两点:

  1. bin选项用于配置命令行入口js以及命令名称(mo)。

  2. dependencies中配置上所需要依赖的框架cmdjs

然后在my-cmd-tool目录下执行下npm install

执行npm link ./,是mo命令可用。

打开命令行,输入mo,这时候将会看到对应的命令提示信息了。

这么一来,命令行工具的第一步就算成功了,剩下的就是构建具体需要的命令插件了。

构建插件

  1. plugin/create.js:
var cmdJs = require("cmdjs");

module.exports = cmdJs.CmdPlugin.extends({
    run : function(value, option, onEnd){
        console.log("testPlugin--value--->", value);
        console.log("testPlugin--option--->");
        console.log(option);
        console.log("config for cmd--->");
        console.log(this.cmd.config);
        //下面参数设置只是为了演示msg.json的功能
        if(option["frameworks"] == "msg") throw this.cmd.getMsg("mo.err.testMsg", "可以传参哦");
        onEnd();
    }

});

这就是命令插件的代码了,通过获取到的各种参数,我们就可以进行具体需要的开发需求了。 最终,通过执行onEnd函数结束命令。onEnd函数依旧保持nodeJs通用的异步回调格式, 即第一个参数为error

  1. msg.json
{
  "mo.err.testMsg" : "测试提示信息【%s】"
}

这个配置文件,主要通过this.cmd.getMsgapi进行消息的获取。支持传参。

  1. option.json
{
  "out" : {"short" : "o", "default" : "./", "desc" : "输出目录,默认为\\033[1;34;1m./\\033[0m"}
}

全局的选项配置。描述中的那种\\033[1;24;1m]这种是控制台输出颜色的设置。

  1. plugin.json
{
  "create" : {
    "short" : "c",
    "desc" : "创建项目",
    "value" : {"type" : "string"},
    "option" : {
      "out" : {"ref" : "out"},
      "frameworks" : {
        "type" : "array", "default" : ["boot"],
        "desc" : "框架的依赖模块"
      }
    }
  }
}
  • short表示短名,也就是说,mo create ...命令可以用mo c ...代替。

  • value定义命令插件参数

  • out选项使用ref引用到全局(即option.json)中的选项配置。

完成

至此,一个简单的命令就构建完成了。你可以在命令行中输入mo create myGame试试。

其中,配置中,最繁琐的莫过于插件选项了,这些已经在cmdjs/test中有很好的展示例子了, 请到这目录下查看相关配置和代码。

如何?是不是觉得以前感觉高大上的命令行工具离自己并不遥远,反而显得简单轻松了许多!

反馈

如果各位在使用过程中遇到各种问题或者有各种意见和建议,欢迎来搞!邮箱:[email protected]