Extract a WSP Solution from SharePoint 2010

This post shows how to download a WSP from SharePoint 2010 using PowerShell.


A customer of mine had a scenario where they needed to download a WSP from SharePoint 2010.  In the Central Administration screen, a link is not available for you to download the WSP solution.


Likewise, with stsadm, there’s not a command to download a solution. 


I could have written this with a C# console application, but I’ve been playing with PowerShell and found that the 3 lines of PowerShell code that it takes is much easier than trying to deploy a binary to a customer’s environment. 

 $farm = Get-SPFarm
$file = $farm.Solutions.Item("extendeddiagnosticproviders.wsp").SolutionFile

Note that in order to run this command, you need to be a member of the Farm Administrators group and have permission to the configuration database.  To configure the permissions for SQL, I recommend using Add-SPShellAdmin.

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SPSolution class