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Add-WindowsPSModulePath is modified by background runspace #67
Description
This is a little hard to explain and I'm not sure if this is a PowerShell Core issue or something with WindowsCompatibility. So I have some transcripts to explain. Each set of commands was done in a new pwsh session with noprofile.
First, this is what I expect would happen. The runspace I create has no effect on the parent session.
**********************
PowerShell transcript start
Start time: 20190124121905
Username: BOVINE320\Jeff
RunAs User: BOVINE320\Jeff
Configuration Name:
Machine: BOVINE320 (Microsoft Windows NT 10.0.17763.0)
Host Application: C:\Program Files\PowerShell\6\pwsh.dll -noprofile
Process ID: 17248
PSVersion: 6.1.2
PSEdition: Core
GitCommitId: 6.1.2
OS: Microsoft Windows 10.0.17763
Platform: Win32NT
PSCompatibleVersions: 1.0, 2.0, 3.0, 4.0, 5.0, 5.1.10032.0, 6.1.2
PSRemotingProtocolVersion: 2.3
SerializationVersion: 1.1.0.1
WSManStackVersion: 3.0
**********************
Transcript started, output file is c:\work\runa.txt
PS C:\> Get-Module
ModuleType Version Name ExportedCommands
---------- ------- ---- ----------------
Manifest 6.1.0.0 Microsoft.PowerShell.Host {Start-Transcript, Stop-Transcript}
Manifest 6.1.0.0 Microsoft.PowerShell.Utility {Add-Member, Add-Type, Clear-Variable, Compare-Object...}
Script 2.0.0 PSReadLine {Get-PSReadLineKeyHandler, Get-PSReadLineOption, Remove-PS...
PS C:\> $env:PSModulePath -split ";"
C:\Users\Jeff\Documents\PowerShell\Modules
C:\Program Files\PowerShell\Modules
c:\program files\powershell\6\Modules
C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules
PS C:\> $foo = "bar123"
PS C:\> Get-Runspace
Id Name ComputerName Type State Availability
-- ---- ------------ ---- ----- ------------
1 Runspace1 localhost Local Opened Busy
PS C:\> Get-PSSession
PS C:\> $newRunspace = [runspacefactory]::CreateRunspace()
PS C:\> $newRunspace.ThreadOptions = "ReuseThread"
PS C:\> $newRunspace.Open()
PS C:\> $pscmd = [PowerShell]::Create().AddScript( {
$foo = "WTF"
})
PS C:\> $pscmd.runspace = $newrunspace
PS C:\> $psCmd.BeginInvoke()
CompletedSynchronously IsCompleted AsyncState AsyncWaitHandle
---------------------- ----------- ---------- ---------------
False True System.Threading.ManualResetEvent
PS C:\> Get-Module
ModuleType Version Name ExportedCommands
---------- ------- ---- ----------------
Manifest 6.1.0.0 Microsoft.PowerShell.Host {Start-Transcript, Stop-Transcript}
Manifest 6.1.0.0 Microsoft.PowerShell.Utility {Add-Member, Add-Type, Clear-Variable, Compare-Object...}
Script 2.0.0 PSReadLine {Get-PSReadLineKeyHandler, Get-PSReadLineOption, Remove-PS...
PS C:\> $env:PSModulePath -split ";"
C:\Users\Jeff\Documents\PowerShell\Modules
C:\Program Files\PowerShell\Modules
c:\program files\powershell\6\Modules
C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules
PS C:\> $foo
bar123
PS C:\> Get-pssession
PS C:\> Get-Runspace
Id Name ComputerName Type State Availability
-- ---- ------------ ---- ----- ------------
1 Runspace1 localhost Local Opened Busy
2 Runspace2 localhost Local Opened Available
PS C:\> Get-Runspace | where-object id -gt 1 | foreach-object {$_.close();$_.dispose()}
PS C:\> Stop-Transcript
**********************
PowerShell transcript end
End time: 20190124121907
**********************Now, I run add the Windows module paths. As you see it work. But when I create the runspace, the paths are gone.
**********************
PowerShell transcript start
Start time: 20190124121935
Username: BOVINE320\Jeff
RunAs User: BOVINE320\Jeff
Configuration Name:
Machine: BOVINE320 (Microsoft Windows NT 10.0.17763.0)
Host Application: C:\Program Files\PowerShell\6\pwsh.dll -noprofile
Process ID: 816
PSVersion: 6.1.2
PSEdition: Core
GitCommitId: 6.1.2
OS: Microsoft Windows 10.0.17763
Platform: Win32NT
PSCompatibleVersions: 1.0, 2.0, 3.0, 4.0, 5.0, 5.1.10032.0, 6.1.2
PSRemotingProtocolVersion: 2.3
SerializationVersion: 1.1.0.1
WSManStackVersion: 3.0
**********************
Transcript started, output file is c:\work\runb.txt
PS C:\> Get-Runspace
Id Name ComputerName Type State Availability
-- ---- ------------ ---- ----- ------------
1 Runspace1 localhost Local Opened Busy
PS C:\> Get-PSSession
PS C:\> Get-Module
ModuleType Version Name ExportedCommands
---------- ------- ---- ----------------
Manifest 6.1.0.0 Microsoft.PowerShell.Host {Start-Transcript, Stop-Transcript}
Manifest 6.1.0.0 Microsoft.PowerShell.Utility {Add-Member, Add-Type, Clear-Variable, Compare-Object...}
Script 2.0.0 PSReadLine {Get-PSReadLineKeyHandler, Get-PSReadLineOption, Remove-PS...
PS C:\> $env:PSModulePath -split ";"
C:\Users\Jeff\Documents\PowerShell\Modules
C:\Program Files\PowerShell\Modules
c:\program files\powershell\6\Modules
C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules
PS C:\> Add-windowspsmodulePath
PS C:\> Get-Module
ModuleType Version Name ExportedCommands
---------- ------- ---- ----------------
Manifest 6.1.0.0 Microsoft.PowerShell.Host {Start-Transcript, Stop-Transcript}
Manifest 6.1.0.0 Microsoft.PowerShell.Utility {Add-Member, Add-Type, Clear-Variable, Compare-Object...}
Script 2.0.0 PSReadLine {Get-PSReadLineKeyHandler, Get-PSReadLineOption, Remove-PS...
Script 1.0.0 WindowsCompatibility {Add-WindowsPSModulePath, Add-WinFunction, Compare-WinModu...
PS C:\> $env:PSModulePath -split ";"
C:\Users\Jeff\Documents\PowerShell\Modules
C:\Program Files\PowerShell\Modules
c:\program files\powershell\6\Modules
C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules
C:\Users\Jeff\Documents\WindowsPowerShell\Modules
C:\Program Files\WindowsPowerShell\Modules
C:\Program Files (x86)\Microsoft SQL Server\140\Tools\PowerShell\Modules\
PS C:\> $newRunspace = [runspacefactory]::CreateRunspace()
PS C:\> $newRunspace.ThreadOptions = "ReuseThread"
PS C:\> $newRunspace.Open()
PS C:\> $pscmd = [PowerShell]::Create().AddScript( {
$foo = "WTF"
})
PS C:\> $pscmd.runspace = $newrunspace
PS C:\> $psCmd.BeginInvoke()
CompletedSynchronously IsCompleted AsyncState AsyncWaitHandle
---------------------- ----------- ---------- ---------------
False True System.Threading.ManualResetEvent
PS C:\> Get-Module
ModuleType Version Name ExportedCommands
---------- ------- ---- ----------------
Manifest 6.1.0.0 Microsoft.PowerShell.Host {Start-Transcript, Stop-Transcript}
Manifest 6.1.0.0 Microsoft.PowerShell.Utility {Add-Member, Add-Type, Clear-Variable, Compare-Object...}
Script 2.0.0 PSReadLine {Get-PSReadLineKeyHandler, Get-PSReadLineOption, Remove-PS...
Script 1.0.0 WindowsCompatibility {Add-WindowsPSModulePath, Add-WinFunction, Compare-WinModu...
PS C:\> $env:PSModulePath -split ";"
C:\Users\Jeff\Documents\PowerShell\Modules
C:\Program Files\PowerShell\Modules
c:\program files\powershell\6\Modules
C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules
PS C:\> Get-pssession
PS C:\> Get-Runspace
Id Name ComputerName Type State Availability
-- ---- ------------ ---- ----- ------------
1 Runspace1 localhost Local Opened Busy
2 Runspace2 localhost Local Opened Available
PS C:\> Get-Runspace | where-object id -gt 1 | foreach-object {$_.close(); $_.dispose()}
PS C:\> Stop-Transcript
**********************
PowerShell transcript end
End time: 20190124121936
**********************Finally, I didn't do anything in the parent session. But the background runspace runs the Add-WindowsPSModulePath command and it affects the parent session! Unless there is something about runspaces that I'm overlooking, this doesn't look like proper behavior. I would expect the runspace I create to be distinct from the parent.
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