Powershell Start-Process with Splatting - powershell

Question

I want to call a "PS App Deployment Toolkit"-package (Link) from a PowerShell-Script with arguments.
The mentioned "PS App Deployment Toolkit"-package is a powershell-script, which I want to call with parameters. (Call a .ps1 from a .ps1)
I want to use splatting for the parameters.
I want to wait for the script to end.
I want to get the exit-code from the script.
Here is my code, which is not working:
$PSADToolKitInstallWrapper = "C:\Temp\MyPackage\PS-AppDeploy.ps1"
$PSADToolKitParameters = #{
"DeploymentType" = "Uninstall";
"DeployMode" = "Interactive";
"AllowRebootPassThru" = $True;
"TerminalServerMode" = $False;
"DisableLogging" = $False;
}
$InstallStatus = Start-Process -FilePath "PowerShell.exe" -ArgumentList $PSADToolKitInstallWrapper #PSADToolKitParameters -Wait -PassThru
Write-Host "Exit-Code: $( $InstallStatus.ExitCode )"
This Line would work fine, but I want to set the Parameters like in the example above:
$InstallStatus = Start-Process -FilePath "PowerShell.exe" -ArgumentList "$PSADToolKitInstallWrapper","-DeploymentType Install -DeployMode Silent -AllowRebootPassThru -TerminalServerMode" -Wait -PassThru
Could you please assist me to get this working?
Thank you!

Answer 1

I don't think you need to try so hard. Why run powershell.exe from inside a PowerShell script? You're already running PowerShell. Just run the command line you want:
$PSADToolKitParameters = #{
"DeploymentType" = "Uninstall"
"DeployMode" = "Interactive"
"AllowRebootPassThru" = $True
"TerminalServerMode" = $False
"DisableLogging" = $False
}
C:\Temp\MyPackage\PS-AppDeploy.ps1 #PSADToolKitParameters
If the path and/or filename to the script you want to run contains spaces, then call it with the invocation operator (&) and quote the filename; example:
& "C:\Temp\My Package\PS-AppDeploy.ps1" #PSADToolKitParameters
Checking the results of the script depends on what the script returns. If it returns an output object, then you can simply assign it:
$output = C:\Temp\MyPackage\PS-AppDeploy.ps1 ...
If the script runs an executable that sets an exit code, you check the value of the $LASTEXITCODE variable (this is analogous to the %ERRORLEVEL% dynamic variable in cmd.exe).