How to set the exit code when throwing an exception

Question

MyScript.ps1:

exit 1

MyThrow.ps1:

throw "test"

Execution in PowerShell:

& ".\MyScript.ps1"
Write-Host $LastExitCode # Outputs 1

Clear-Variable LastExitCode

& ".\MyThrow.ps1"
Write-Host $LastExitCode # Outputs nothing

How do I set a proper exit code when throwing an exception?

Answer 1

You don't. When you throw an exception you expect someone to handle it. That someone would be the one to terminate execution and set an exit code. For instance:

try {
  & ".\MyThrow.ps1"
} catch {
  exit 1
}

If there is nothing to catch your exception you shouldn't be throwing it in the first place, but exit right away (with a proper exit code).