Author Posts

December 3, 2016 at 12:46 am

I've just finished the MVA modules for "Getting Started with Microsoft PowerShell" (PS 3.0 JumpStart) with Helmick and Snover. In order to keep a ps1 in the active call stack, Snover says to "dot" it, a trick he calls, "dot-sourcing," which keeps the script from being discarded from the call stack after execution; however, there is no mention of how to remove it from the stack afterward.

How can I remove a given script call from the working stack without starting a new session?

Thanks,
Patrick (Krieger-bot)

December 3, 2016 at 1:40 am

Why do you want to remove it? Or why don't you like to start a new session?

December 3, 2016 at 11:26 am

It can be done in two ways...

Hard one. Know explicitly and enumerate everything which was dot-sourced (functions, variables...) and remove them explicitly.

Remove-Item Function:TheFunctionILoaded ...

Easy and recommended one. Create a PowerShell Module (PSM1) with your code (just rename the PS1 to PSM1). Use with

 Import-Module ./yourmodule.psm1

When no longer needed,

   Remove-Module YourModuleName

This is what modules are for (amongst many other nice functionalities).

BTW, dot-sourcing is not a trick, is a needed command to specify "Load a file contents, and keep it in memory", in comparison to ./file.ps1 which means "Load the file, run it, forget it after running" (the usual script flow).

http://www.powershelltraining.eu

December 7, 2016 at 12:41 am

Olaf – Mostly curious. If there's a way to turn something on, then there is usually a way to turn it off in the same session. Otherwise it could become a vulnerability.

JC – THANKS!