Repackage cspkg file with replacement web.config

gistfile1.txt

function ZipFiles( $zipfilename, $sourcedir )
{
   Add-Type -Assembly System.IO.Compression.FileSystem
   Add-Type -Assembly System.IO.Compression

   $archive = [System.IO.Compression.ZipFile]::Open($zipfilename, [System.IO.Compression.ZipArchiveMode]::Create);
   
   try
   {
      $files = [System.IO.Directory]::GetFiles($sourceDir, "*.*", [System.IO.SearchOption]::AllDirectories)
      
      foreach ($filename in $files)
      {
        $relativePath = $filename.Substring($sourcedir.Length + 1).Replace("\", "/");
        
        echo "Creating zip entry for $relativePath"
        
        $entry = $archive.CreateEntry($relativePath, [System.IO.Compression.CompressionLevel]::Optimal);
        
        $destination = $entry.Open();
        
        try
        {
          try
          {
            $source = [System.IO.File]::OpenRead($filename);
            $source.CopyTo($destination);
          }
          finally
          {
            $source.Dispose(); 
          }
        }
        finally
        {
          $destination.Dispose();
        }
      }
   }
   finally
   {
      $archive.Dispose();
   }
}

function UnzipFiles( $zipfilename, $dest )
{
   Add-Type -Assembly System.IO.Compression.FileSystem
   [System.IO.Compression.ZipFile]::ExtractToDirectory($zipfilename, $dest)
}

$cspkg = Get-ChildItem *.cspkg

rm -Recurse -ErrorAction SilentlyContinue  "cspkg.temp"
md -Force "cspkg.temp"

UnzipFiles ($cspkg.FullName) ((Get-Item -Path ".\" -Verbose).FullName + "\cspkg.temp")

$doc = [xml](Get-Content -Path "cspkg.temp\package.xml")

$ns = new-object system.xml.xmlnamespacemanager($doc.NameTable)
$ns.addnamespace("i", $doc.documentelement.namespaceuri)
$node = $doc.SelectNodes("//i:FilePath[text() = '\approot\Web.config']", $ns)

$node = $node.ParentNode

$path = "cspkg.temp/" + $node.filedescription.datacontentreference

echo "Copying Web.config to $path"

copy Web.config $path

rm -force $cspkg.FullName

ZipFiles $cspkg.FullName ((Get-Item -Path ".\" -Verbose).FullName + "\cspkg.temp")