Web.Config transforms outside of Microsoft MSBuild?

Question

Is it possible to use Microsoft\'s XML document transform, for preparing web.configs, outside of MSBuild? I would like to use PowerShell to do these transform without having

Answer 1

So extended slightly to work recursively

    function XmlDocTransform($xml, $xdt)
    {
        if (!$xml -or !(Test-Path -path $xml -PathType Leaf)) {
            throw "File not found. $xml";
        }
        if (!$xdt -or !(Test-Path -path $xdt -PathType Leaf)) {
            throw "File not found. $xdt";
        }
        $scriptPath = (Get-Variable MyInvocation -Scope 1).Value.InvocationName | split-path -parent
        Add-Type -LiteralPath "$scriptPath\Microsoft.Web.XmlTransform.dll"
        $xmldoc = New-Object Microsoft.Web.XmlTransform.XmlTransformableDocument;
        $xmldoc.PreserveWhitespace = $true
        $xmldoc.Load($xml);
        $transf = New-Object Microsoft.Web.XmlTransform.XmlTransformation($xdt);
        if ($transf.Apply($xmldoc) -eq $false)
        {
            throw "Transformation failed."
        }
        $xmldoc.Save($xml);
    }
    function DoConfigTransform($webFolder, $environment)
    {
        $allConfigFiles = Get-ChildItem $webFolder -File -Filter *.config -Recurse
          $transformFiles = $allConfigFiles | Where-Object {$_.Name -like ("*." + $environment + ".config")} | %{$_.fullname}
          ForEach($item in $transformFiles)
          {
            $origFile = $item -replace("$environment.",'')
              XmlDocTransform -xml $origFile -xdt $origFile$item
              #Write-Output ("orig = " + $origFile + ", transform = " + $item)
          }
          cd C:\WebApplications\xxx\xxx\xxx\
          .\PostDeploy.ps1
    }
    DoConfigTransform -webFolder "C:\WebApplications\xxx\xxx\xxx" -environment "xx-xxx-xx"

So the DoConfigTransform logic goes:

• Find all config files recursively
• Find all transform templates for the environment we are in #passed in as a parameter
• For each transform file, find the corresponding config
• Then do transform
• Code runs a postdeploy script to remove all unwanted transform files.

Answer 2

I updated the script a bit to make it work with the latest version of powershell and make it a bit easier.

function XmlDocTransform($xml, $xdt)
{
      $scriptpath = $PSScriptRoot + "\"
      $xmlpath = $scriptpath + $xml
      $xdtpath = $scriptpath + $xdt

      if (!($xmlpath) -or !(Test-Path -path ($xmlpath) -PathType Leaf)) {
         throw "Base file not found. $xmlpath";
      }

      if (!($xdtpath) -or !(Test-Path -path ($xdtpath) -PathType Leaf)) {
         throw "Transform file not found. $xdtpath";
      }

      Add-Type -LiteralPath "$PSScriptRoot\Microsoft.Web.XmlTransform.dll"

      $xmldoc = New-Object   Microsoft.Web.XmlTransform.XmlTransformableDocument;
      $xmldoc.PreserveWhitespace = $true
      $xmldoc.Load($xmlpath);

      $transf = New-Object Microsoft.Web.XmlTransform.XmlTransformation($xdtpath);
      if ($transf.Apply($xmldoc) -eq $false)
      {
          throw "Transformation failed."
      }
      $xmldoc.Save($xmlpath);

      Write-Host "Transformation succeeded" -ForegroundColor Green
  }

And to invoke the function use

 XmlDocTransform "App.config" "App.acc.config"