λ npm link
npm WARN app@1.0.0 No repository field.

up to date in 0.724s
npm ERR! path C:\Users\Cooper\AppData\Roaming\npm\node_modules\app\app
npm ERR! code ENOENT
npm ERR! errno -4058
npm ERR! syscall chmod
npm ERR! enoent ENOENT: no such file or directory, chmod 'C:\Users\Cooper\AppData\Roaming\npm\node_modules\app\app'
npm ERR! enoent This is related to npm not being able to find a file.
npm ERR! enoent

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Cooper\AppData\Roaming\npm-cache\_logs\2018-04-06T17_15_16_211Z-debug.log

package.json文件如下：

{
  "name": "app",
  "version": "1.0.0",
  "description": "玩轉(zhuǎn)命令行開發(fā)",
  "main": "index.js",
  "bin": {
    "app": "app"
  },
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "cooper",
  "license": "ISC",
  "devDependencies": {
    "chalk": "^2.3.2",
    "commander": "^2.15.1",
    "inquirer": "^5.2.0"
  }
}