如何通过 PowerShell 脚本正确设置变量，然后使用 Azure DevOps 在另一个脚本中使用它？

Question

I have a first inline PowerShell script where I am filtering my test project directory and setting its value to a variable called testProjectPath .

- task: PowerShell@2
  displayName: "Get tests path"
  inputs:
    targetType: "inline"
    script: |
      $testpath = Get-ChildItem -Filter *Tests.csproj -Recurse | Select-Object Directory -First 1
      
      Write-Host "##vso[task.setvariable variable=testProjectPath]$testpath"

And then I have a second script which tries to Set-Location based on the path present in my testProjectPath variable.

- task: PowerShell@2
  displayName: "Run mutations"
  inputs:
    targetType: "inline"
    script: |
      Set-Location $env:testProjectPath

But every time I try to run this pipeline I get the following error message:

@{Directory=D:\a\1\s\Wms.PickingCheck.Tests}
Set-Location : Cannot find drive. A drive with the name '@{Directory=D' does not exist.
At D:\a\_temp\752e8e31-b8ac-4f43-9ee0-248f6b12577c.ps1:4 char:1
+ Set-Location $env:testProjectPath
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (@{Directory=D:String) [Set-Location], DriveNotFoundException
    + FullyQualifiedErrorId : DriveNotFound,Microsoft.PowerShell.Commands.SetLocationCommand
 

What am I doing wrong here?

Answer 1

In your original script, the value of $testpath is @{Directory=xxxxxx} . However, Set-Location doesn't recognize this format, Set-Location sets the current working location to a specified location, that's why you got error:

You could modify your script by adding -Expand as @AdminOfThings mentioned: $testpath = Get-ChildItem -Filter *Tests.csproj -Recurse | Select-Object -Expand DirectoryName -First 1 $testpath = Get-ChildItem -Filter *Tests.csproj -Recurse | Select-Object -Expand DirectoryName -First 1