Code to set the run.mode to production within WAR files.

jetty-web.xml

<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://jetty.mortbay.org/configure.dtd">
<Configure class="org.mortbay.jetty.webapp.WebAppContext">
  <Call class="java.lang.System" name="setProperty">
    <Arg>run.mode</Arg>
    <Arg>production</Arg>
  </Call>
</Configure>

Project.scala

  val jettyWebPath = "src" / "main" / "webapp" / "WEB-INF" / "jetty-web.xml"

  lazy val installProductionRunMode = task {
    FileUtilities.copyFile("project" / "jetty-web.xml",
                           jettyWebPath,
                           log)
    log.info("Copied jetty-web.xml into place")
    None
  } describedAs("Install a jetty-web.xml that sets the run mode to production")

  lazy val superPackage = super.packageAction dependsOn(installProductionRunMode)

  lazy val removeProductionRunMode = task {
    FileUtilities.clean(jettyWebPath, log)
    None
  } describedAs("Remove jetty-web.xml and hence set run mode back to testing")

  override def packageAction = removeProductionRunMode dependsOn(superPackage) describedAs BasicWebScalaProject.PackageWarDescription