node.js - 对于某些 Windows 命令，nodejs exec 命令失败，并且没有明确的错误消息

Question

我的程序中有一个编辑器，可以动态编写命令并执行它们。我想通过 child_process exec 将 myPublish 目录中的所有文件和文件夹移动到当前目录。我在 Windows 中使用 robocopy 命令。当我在 cmd 中测试 robocopy 时，它工作正常:

robocopy /s .\myPublish .\ /move

但是在程序中，nodejs给出了一条不清楚的错误消息，只是说:“命令失败:robocopy/s .\myPublish .\/move\n”

Answer 1

我也刚刚遇到这个问题。虽然大多数控制台应用程序在没有错误时应返回退出代码为零，但 robocopy 有一系列自定义退出代码。这使得 Node 认为执行过程中出现了错误，而实际上可能没有错误。

根据 here ，Robocopy 具有以下组成退出代码的退出代码位:

0×10 Serious error. Robocopy did not copy any files. This is either a usage error or an error due to insufficient access privileges on the source or destination directories.

0×08 Some files or directories could not be copied (copy errors occurred and the retry limit was exceeded). Check these errors further.

0×04 Some Mismatched files or directories were detected. Examine the output log. Housekeeping is probably necessary.

0×02 Some Extra files or directories were detected. Examine the output log. Some housekeeping may be needed.

0×01 One or more files were copied successfully (that is, new files have arrived).

0×00 No errors occurred, and no copying was done. The source and destination directory trees are completely synchronized.

要解决此问题，您需要捕获错误并检查错误代码:

const cp = require('child_process');
try { 
    cp.execSync('robocopy ...'); 
} catch (err) { 
    console.log(err.status);             // get the return code
    console.log(err.output.toString());  // get robocopy's full output
}

我认为您通常会认为大于 8 的代码是更严重的错误。