//this will produce plugins.txt with the updated plugin version.
def plugins = Jenkins.instance.pluginManager.plugins.toSorted()
plugins.each { plugin ->
  def update = plugin.updateInfo
  def version = "${plugin.version}"
  if (update != null) {
    version = "${update.version}"
  	println "# Upgraded ${plugin.shortName} from ${plugin.version} to ${update.version}"
  }
  println "${plugin.shortName}:${version}"
}