Question

我有一个应用程序，允许您运行用户提供的PowerShell脚本。我想在脚本的顶部注入一些代码来暂停第一行上运行的脚本，并等待调试器（即PowerShell ISE）附加。

我想要实现的一个很好的例子是DSC如何暂停并等待你附加：

PS C:\> Enable-DscDebug -BreakAll
PS C:\> Start-DscConfiguration .\temp\DSCTestClass -wait -force
WARNING: [DEV-14257-44]: [DSCEngine] Warning LCM is in Debug 'ResourceScriptBreakAll' mode. Resource script processing will be stopped to wait for PowerShe1l script debugger to attach.
WARNING: [DEV-14257-44]: [[FileResource]file] Resource is waiting for PowerShell script debugger to attach. Use the following commands to begin debugging this resource script:
Enter-PSSession -ComputerName DEV-14257-44 -Credential <credentials>
Enter-PSHostProcess -Id 596 -AppDomainName DscPsPluginWkr_AppDomain
Debug-Runspace -Id 4

（这个例子来自https://blogs.msdn.microsoft.com/powershell/2016/03/14/debugging-powershell-dsc-class-resources/）

不幸的是，当我尝试设置类似的等待时，powershell.exe会自动启动命令行调试器：

给定文件test.ps1：

set-psbreakpoint -script "test.ps1" -line 4
write-host "pid is $pid"
write-host "Pausing for debugger to attach"
write-host "Paused waiting for debugger to attach"

当我运行它时（即使在-noninteractive模式下），它会启动命令行调试器：

PS C:\temp\PowershellDebugging> powershell -file .\test.ps1 -noninteractive

  ID Script                           Line Command                          Variable                        Action
  -- ------                           ---- -------                          --------                        ------
   0 test.ps1                         4
pid is 13228
Pausing for debugger to attach
Entering debug mode. Use h or ? for help.

Hit Line breakpoint on 'C:\temp\PowershellDebugging\test.ps1:6'

At C:\temp\PowershellDebugging\test.ps1:6 char:1
+ write-host "Paused waiting for debugger to attach"
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[DBG]: PS C:\temp\PowershellDebugging>

如何在不启动命令行调试器的情况下让PowerShell中断/暂停执行？

修改

正在执行的脚本只存在很短的时间（写入磁盘，执行，然后清理）。此外，运行它的powershell.exe实例仅存在很短的时间 - 在执行之前没有长时间运行的过程来手动附加到并设置断点。

Answer 1

从PowerShell团队获得一些帮助后（谢谢！），事实证明关键是使用New-RunSpace。通常，如果您只是执行一个脚本，它将在默认的RunSpace中运行，并且已经附加了内置的PowerShell调试器。

以下演示了如何使用它：

# create a fake script that simulates the user provided scrip 
@'
  Write-Output "Starting Test"
  1..20 | foreach {
     Write-Output "I Love PowerShell!"
  }
  Write-Output "Test Complete"
'@ | Set-Content -Path c:\temp\Test.ps1

# create a launcher script
@'
  Write-Output "Process Id: $pid"
  $ps = [powershell]::Create([System.Management.Automation.RunspaceMode]::NewRunspace)
  Write-Output "Runspace Id: $($ps.Runspace.Id)"
  $ps.AddScript(‘Wait-Debugger; C:\temp\Test.ps1’).Invoke()
'@ | Set-Content -Path c:\temp\LaunchTestInNewRunspace.ps1

# run the launch script
PS C:\> powershell -File c:\temp\LaunchTestInNewRunspace.ps1
Process Id: 14288
Runspace Id: 2

在另一个窗口中：

# in another window
PS C:\> Enter-PSHostProcess -Id 14288
[Process:14288]: PS C:\> Debug-RunSpace -Id 2
Debugging Runspace: Runspace2
To end the debugging session type the 'Detach' command at the debugger 
prompt, or type 'Ctrl+C' otherwise.

Entering debug mode. Use h or ? for help.

At line:1 char:16
+ Wait-Debugger; C:\temp\Test.ps1
+                ~~~~~~~~~~~~~~~~

这会进入调试器，准备进入Test.ps1。

如何在调试器附加之前暂停PowerShell脚本

1 个答案: