从 PowerShell v2 中的 -Verbose 开关捕获详细输出

Question

今天遇到一个有趣的问题，让我很困惑。我需要捕获详细流的输出并将其写入标准输出。

这可以通过以下方式完成：

# Create a PowerShell Command 

$pscmd = [PowerShell]::Create() 

# Add a Script to change the verbose preference. 
# Since I want to make sure this change stays around after I run the command I set UseLocalScope to $false. 
# Also note that since AddScript returns the PowerShell command, I can simply call Invoke on what came back. 
# I set the return value to $null to suppress any output 

$null = $psCmd.AddScript({$VerbosePreference = "Continue"},$false).Invoke() 

# If I added more commands, I'd be adding them to the pipeline, so I want to clear the pipeline 

$psCmd.Commands.Clear() 

# Now that I've cleared the pipeline, I'll add another script that writes out 100 messages to the Verbose stream 

$null = $psCmd.AddScript({Write-verbose "hello World" }).Invoke() 

# Finally, I'll output the stream 

$psCmd.Streams.Verbose

现在有趣的部分是如果我要创建一个名为 Hello-World 并使用 [CmdletBinding()] 要继承 -verbose 开关，我无法再捕获输出：

Function Hello-World {
    [CmdletBinding()]
    Param()

    Write-Verbose "hello world"
}

...
$null = $psCmd.AddScript({Hello-World -Verbose }).Invoke() 
...

我假设该函数被赋予了自己的详细流，并且该流的可见性丢失了，但我并不肯定。这有关系吗 [CmdletBinding()]?

避免转录，有没有办法实现这一点？

谢谢！

Answer 1

谢谢@JasonMorgan，下面是似乎有效的解决方案。我需要在我制作的 pscmd 中声明该函数：

$pscmd = [PowerShell]::Create() 

$null = $psCmd.AddScript({$VerbosePreference = "Continue"},$false).Invoke()
$null = $psCmd.AddScript({
  function Hello-World {
    [CmdletBinding()]
    Param()
    Write-Verbose "hello world"
  }
}, $false).Invoke() 

$psCmd.Commands.Clear() 

$null = $psCmd.AddScript({Hello-World -Verbose }).Invoke() 

$psCmd.Streams.Verbose