nrm安装报错，解决方案

下方为错误信息

C:\Users\kefu>nrm --version
internal/validators.js:124
    throw new ERR_INVALID_ARG_TYPE(name, 'string', value);
    ^

[TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined
  at validateString (internal/validators.js:124:11)
  at Object.join (path.js:375:7)
  at Object.<anonymous> (C:\Users\kefu\AppData\Roaming\npm\node_modules\nrm\cli.js:17:20)
  at Module._compile (internal/modules/cjs/loader.js:1063:30)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
  at Module.load (internal/modules/cjs/loader.js:928:32)
  at Function.Module._load (internal/modules/cjs/loader.js:769:14)
  at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
  at internal/main/run_main_module.js:17:47
] {
  code: 'ERR_INVALID_ARG_TYPE'
}

解决方案
找到下方地址（见加粗部分，具体位置请参考报错代码的路径）

C:\Users\kefu\AppData\Roaming\npm\node_modules\nrm\cli.js:17:20

注释或者删除【cli.js】第十七行，修改为下方代码

//const NRMRC = path.join(process.env.HOME, '.nrmrc'); (删除)
const NRMRC = path.join(process.env[(process.platform == 'win32') ? 'USERPROFILE' : 'HOME'], '.nrmrc');

最后一步
我们在cmd中执行nrm --version，即可发现成功显示版本号

C:\Users\kefu>nrm --version
1.2.1