如何在系统路径中查找某个文件是否可用? [英] How to find whether a certain file is available in the system path?

问题描述

我的 Powershell 脚本必须从 VS 命令提示符运行，我想通过检查 msbuild.exe 是否在路径中来验证这一点.我设法使用 where.exe 做到了:

My Powershell script must be run from a VS command prompt, and I want to verity that by checking that msbuild.exe is in path. I managed to do it using where.exe:

where.exe msbuild.exe > $null
if ($LASTEXITCODE -ne 0)
{
    throw "BuildAll must be run from ""Developer Command Prompt for VS2012"" shortcut."
}

然而，这感觉不像是Powershell 方式"——有没有一种 Powershell 原生方式来做到这一点?

However, this doesn't feel like "the Powershell way" - is there a Powershell-native way to do this?

推荐答案

如果 msbuild.exe 必须与脚本位于同一文件夹中，请尝试此操作

Try this if the msbuild.exe must be in the same folder as the script is

   if ( TEST-PATH (JOIN-PATH (Split-Path -parent $MyInvocation.MyCommand.Definition) "msbuild.exe " ))
{
  ...
}
else
{
  ...
}

如果您想检查 build.exe 是否可用作命令($env:path 中的任何可用路径)，您可以执行以下操作:

If you want check if build.exe is available as command (any available path from $env:path) you can do:

if ([bool](Get-Command "msbuild.exe" -ea silentlycontinue)) 
{ 
  ...
}

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