upgrade sharepoint 2010 wsp using powershell script

# Example: "D:\SiteBackUp\" - Remember the backward slash '\' at the end of the path.

$SharedLocation = "D:\Projects\DeployFiles\New Folder\"

# Example: "http://siteurl/"

$Weburl = "servername"

# Example: 80

$WebPort = "33980"

# **********************************************************************************************************************************

# Check if folder exists

      if (Test-Path $SharedLocation)

      {

            # Get all the WSP files from the solution folder

            $list = Get-ChildItem ($SharedLocation) | where {$_.extension -eq ".wsp"}

            # Loop through each wsp file in the solutions folder

            foreach($wspfile in $list)

            {

                  # Retrieve the solution package already added

                  $CheckPackage = Get-SPSolution -identity $wspfile.Name

                  write-host "Deploying Solution: " $wspfile.Name

                 

                  if ($CheckPackage) 

                  {

                        if ($CheckPackage.ContainsWebapplicationResource)

                        {

                              if ($CheckPackage.ContainsGlobalAssembly)

                              {

                                  Update-SPSolution –Identity $CheckPackage –LiteralPath ($SharedLocation + $wspfile.Name) -GacDeployment

                              }

                              else    

                              {

                                     Update-SPSolution –Identity $CheckPackage –LiteralPath ($SharedLocation + $wspfile.Name)

                              }   

                        }  

                         else

                        {

                               if ($CheckPackage.ContainsGlobalAssembly)

                              {

                               Update-SPSolution –Identity $CheckPackage –LiteralPath ($SharedLocation + $wspfile.Name) -GacDeployment

                              }

                               else

                              {

                              Update-SPSolution –Identity $CheckPackage –LiteralPath ($SharedLocation + $wspfile.Name)

                              }

                        }

                  }

            }

      write-host "Solution pack upgrades completed successfully...!"

      }

      else

      {

      " No shared/local folder found ! Please check the shared location path !!"

      }