使用 Invoke-Command 调用脚本时在 PowerShell 中获取脚本目录 [英] Get script directory in PowerShell when script is invoked with Invoke-Command

问题描述

我有一组 PowerShell 脚本，其中包含一个位于同一文件夹中的通用"脚本，如下所示:

I have a set of PowerShell scripts that include a "common" script, located in the same folder, like this:

# some-script.ps1
$scriptDir = Split-Path -Parent $myinvocation.mycommand.path
. "$scriptDir\script-utils.ps1"

如果直接调用脚本就可以了，例如

This is fine if the script is called directly, e.g.

.\some-script.ps1

但是，如果使用 Invoke-Command 调用脚本，则这不起作用:

However, if the script is called with Invoke-Command, this does not work:

Invoke-Command -ComputerName server01 -FilePath "X:\some-script.ps1"

在这种情况下，事实上，$myinvocation.mycommand 包含脚本的内容，$myinvocation.mycommand.path 为空.
当使用 Invoke-Command 调用脚本时，如何以同样有效的方式确定脚本的目录?

In this case, infact, $myinvocation.mycommand contains the contents of the script, and $myinvocation.mycommand.path is null.
How can I determine the script's directory in a way that works also when the script is invoked with Invoke-Command?

注意
最后，这是我实际使用的解决方案:

NOTE
In the end, this is the solution I actually used:

Invoke-Command -ComputerName server01 `
  {param($scriptArg); & X:\some-script.ps1 $scriptArg } `
  -ArgumentList $something

这也允许向脚本传递参数.

This also allows passing parameters to the script.

推荐答案

我不相信您可以从调用的脚本中进行.来自 get-help invoke-command:

I don't believe you can, from within the invoked script. From get-help invoke-command:

-文件路径在一台或多台远程计算机上运行指定的本地脚本.输入脚本的路径和文件名，或通过管道将脚本路径传递给 Invoke-Command.脚本必须驻留在本地计算机或目录中本地电脑可以访问.使用 ArgumentList 参数指定脚本中的参数值.

-FilePath Runs the specified local script on one or more remote computers. Enter the path and file name of the script, or pipe a script path to Invoke-Command. The script must reside on the local computer or in a directory that the local computer can access. Use the ArgumentList parameter to specify the values of parameters in the script.

 **When you use this parameter, Windows PowerShell converts the contents of the specified script file to a script
 block, transmits the script block to the remote computer, and runs it on the remote computer.**

当您使用带 -filepath 参数的 invoke-command 时，将从本地计算机上的文件中读取脚本，将其转换为脚本块，然后将其传递给远程计算机.远程计算机无法知道该脚本块是否是从文件中读取的.

When you use invoke-command using the -filepath parameter, the script is read from the file on the local computer, converted to a script block, and that's what gets passed to the remote computer. The remote computer doesn't have any way of knowing if that script block was read from a file.

要让远程计算机知道原始文件路径是什么，您必须告诉它.我认为最简单的方法是编写一个函数来执行调用，并将文件名作为参数传递给调用的脚本.

For the remote computer to know what that original file path was, you'll have to tell it. I think the easiest way to do that would be to write a function to do the invocation, and have it pass the filename to the invoked script as a parameter.

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