Regular Expressions - Powershell

Question

I am writing a test case script which installs Citrix Receiver, checks whether the store has been created and then uninstalls it.

The way I am uninstalling Receiver is by running this command:

Start-Process "C:\ProgramData\Citrix\Citrix Receiver 4.12\TrolleyExpress.exe" -argumentlist "/silent /uninstall /cleanup" -Wait -PassThru

The path to TrolleyExpress.exe and /uninstall /cleanup arguments are obtained from a registry key value. I have obtained the value contents and contained it into a variable:

$uninstallString = (Get-ItemProperty -path HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\CitrixOnlinePluginPackWeb -name UninstallString).UninstallString

$uninstallString becomes C:\ProgramData\Citrix\Citrix Receiver 4.12\TrolleyExpress.exe /uninstall /cleanup

What I'm aiming for is to get the path to TrolleyExpress.exe from the regedit directly, since it is a test case which will run on multiple machines. In case the Receiver is installed on something different than C: or different path.

This is my first month into PowerShell Scripting and I'm quite new to Regular Expressions.

Any help\suggestion on how this could be solved is highly appreciated!

Answer 1

Assuming the path in the registry follows the example you give (except possibly the drive letter), then one easy way to get just the path is:

$exePath = $uninstallString.Split('/')[0]