<?xml version="1.0" encoding="utf-8" ?>
<Feature xmlns="http://schemas.microsoft.com/sharepoint/" Version="1.7.0.0">
  <UpgradeActions>
    <VersionRange BeginVersion="1.0.0.0" EndVersion="1.4.0.0">
      <ApplyElementManifests>
        <ElementManifest Location="module1Elements_v1_2.xml" />
        <ElementManifest Location="module2Elements_v1_3.xml" />
      </ApplyElementManifests>
    </VersionRange>

    <VersionRange BeginVersion="1.7.0.0" >
      <ApplyElementManifests>
        <ElementManifest Location="module1Elements_v1_4.xml" />
      </ApplyElementManifests>
    </VersionRange>

    <VersionRange>
      <CustomUpgradeAction Name="UpgradeElements" />
    </VersionRange>
  </UpgradeActions>
</Feature>

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <Module Name="ConnectionLauncher" Path="ProductNameConnectionLauncher" Url="ProductName/ConnectionLauncher">
    <File Path ="ProductName.Module1.dll" Url="ProductName.Module1.dll.deploy" IgnoreIfAlreadyExists="TRUE" Type="GhostableInLibrary" />
    <File Path="ProductName.Module2.dll" Url="ProductName.Module.dll.deploy"2 IgnoreIfAlreadyExists="TRUE" Type="Ghostable" />
    <File Path="ProductName.Module3.dll" Url="ProductName.Module3.dll.deploy" IgnoreIfAlreadyExists="TRUE" Type="GhostableInLibrary" />
    <File Path="ProductName.Module4.dll" Url="ProductName.Module4.dll.deploy" IgnoreIfAlreadyExists="TRUE" Type="Ghostable"  />
  </Module>
</Elements>

$fullName = "$featureName$version.wsp"
$path = Get-Location
$fullPath = "$path$fullName"
Write-Host "Updating $fullPath"

'check that it exists
if(![System.IO.File]::Exists($fullPath)){
    # file with path $path doesn't exist
    Write-Error "The file $fullPath does not exist."
    exit
}

Update-SPSolution -Identity $baseName -LiteralPath "$fullPath" -GACDeployment


'Now just wait for it to deploy
Write-Host -NoNewline "Waiting for product deployment..."
$Solution = get-SpSolution $Name
while($Solution.JobExists)
{
    sleep 2
    Write-Host -NoNewline "."
    $Solution = get-SpSolution $Name
}

$webApp = [Microsoft.SharePoint.Administration.SPWebApplication]::Lookup("http://localhost")
$features = $webApp.QueryFeatures($featureGuid, $true)

foreach($feature in $features){
  Write-Host ("Feature Version " + $feature.Version)

  try
  {
    $feature.Upgrade($true)
      Write-Host ("Upgraded to Feature Version " + $feature.Version)
  }
  catch [Exception]
  {
      Write-Error ("Exception Upgrading")
    echo $_.Exception.GetType().FullName, $_.Exception.Message
  }
 }