I’ve recently started to sync my Powershell profile between my work and home PCs.  What I quickly found out however, was that I had some Powershell snapins installed on one computer, but not the other.  Here’s a bit of script which I came up with to handle things cleanly. 

   1: $snapins = "psmsi", # Windows Installer PowerShell Extensions

   2:   "PshX-SAPIEN", # AD cmdlets from Sapien

   3:   "GetGPObjectPSSnapIn", # GPO management

   4:   "PowerPad", # mini-editor

   5:   "Quest.ActiveRoles.ADManagement", # more AD stuff

   6:   "Microsoft.Office.OneNote"

   7: $snapins | ForEach-Object { 

   8:   if ( Get-PSSnapin -Registered $_ -ErrorAction SilentlyContinue ) {

   9:     Add-PSSnapin $_

  10:   }

  11: }

In lines 1-6 you see I’m building an array called $snapins.  Each one of these is the exact name of the snapin as seen when you run ‘get-pssnapin -r’ at the prompt.

Line 7: I use a foreach-object loop to iterate through each item in the array.

Line 8: Get-PsSnapin takes as an optional parameter the name of a snapin, so this If block evaluates to true if the current snapin in the loop (that’s using the $_ automatic variable) is indeed installed.

Line 9: If it’s true…I add the snapin to the current session using the Add-PsSnapin cmdlet.

Hope you find this useful!