Node xml = parseXml(path)
  action.execute(xml)

  File xmlFile = project.file(path)
  xmlFile.withPrintWriter { writer ->
    def printer = new XmlNodePrinter(writer)
    printer.namespaceAware = true
    printer.preserveWhitespace = true
    writer.write("<?xml version=\"1.0\"?>\n")

    if (preface != null) {
      writer.write(preface)
    }