執行npm命令時遇到operation not permitted問題的分析與處理

背景

今天從碼雲上下載了一個前端的開源項目，基於node.js的，按照項目說明需要安裝grunt-cli，使用如下命令：

npm install grunt-cli -g

結果運行出現operation not permitted錯誤，如下圖：

圖中的詳細錯誤：

PS E:\npmprojects\AdminLTE-With-Iframe> npm install grunt-cli -g
npm WARN npm npm does not support Node.js v13.0.1
npm WARN npm You should probably upgrade to a newer version of node as we
npm WARN npm can't make any promises that npm will work with this version.
npm WARN npm Supported releases of Node.js are the latest release of 6, 8, 9, 10, 11, 12.
npm WARN npm You can find the latest version at https://nodejs.org/
npm ERR! code EPERM
npm ERR! syscall mkdir
npm ERR! path C:\Program Files\nodejs\node_modules\.staging
npm ERR! errno -4048
npm ERR! Error: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_modules\.staging'
npm ERR!  [OperationalError: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_modules\.staging'] {
npm ERR!   cause: [Error: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_modules\.staging'] {
npm ERR!     errno: -4048,
npm ERR!     code: 'EPERM',
npm ERR!     syscall: 'mkdir',
npm ERR!     path: 'C:\\Program Files\\nodejs\\node_modules\\.staging'
npm ERR!   },
npm ERR!   stack: "Error: EPERM: operation not permitted, mkdir 'C:\\Program Files\\nodejs\\node_modules\\.staging'",
npm ERR!   errno: -4048,
npm ERR!   code: 'EPERM',
npm ERR!   syscall: 'mkdir',
npm ERR!   path: 'C:\\Program Files\\nodejs\\node_modules\\.staging',
npm ERR!   parent: 'grunt-cli'
npm ERR! }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It's possible that the file was already in use (by a text editor or antivirus),
npm ERR! or that you lack permissions to access it.
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\zheng\AppData\Roaming\npm-cache\_logs\2020-06-11T02_58_47_025Z-debug.log

問題分析

這個問題，主要是由於權限不夠導致，我最初執行上面的命令使用的Windows PowerShell，沒有以管理員身份運行。

解決方法

以管理員身份運行CMD，重新在工程目錄下執行以上命令，發現運行一切正常~