Upgrade a Deployed Solution
Scenario/Problem: You have an updated solution package that needs to be deployed to SharePoint.
Solution: Use the Update-SPSolution cmdlet with a solution variable.
The Update-SPSolution cmdlet enables you to upgrade a previously deployed solution with a newer version of the solution package (and underlying files). Use this in conjunction with the Get-SPSolution cmdlet (explained in a previous section), as shown in Listing 9.8.
Listing 9.8. Sample Configuration Script for Upgrading a Solution
$solution = Get-SPSolution-Identity c0e31dec-294d-4f2d-9ae4-f2e637c766bdUpdate-SPSolution $solution -LiteralPath "c:\newsolution.wsp" -Force-GACDeployment
The -LiteralPath determines the location of the updated solution package. ...
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