org.eclipse.wtp.releng.webupdatesite/build-home/runAntRunner.xml

<?xml version="1.0" encoding="UTF-8"?>
    <!--
        A utility ant script to invoke AntRunner application with
        Eclipse. This is handy since some ant scripts are running in
        plain ant, but we'd like to use Eclipse's ant tasks for things
        like p2 operations.
    -->
<project
    name="runAntRunner"
    default="runAntRunner"
    basedir=".">

	<fail unless="eclipse.home" message="eclispe.home must be set to run this script" />
		
	<available file="${eclipse.home}" property="eclipseAvailable" />
	<fail unless="eclipseAvailable" message="Eclipse is not available, as ${eclipse.home}. Perhaps eclipse.home has incorrect value?" />

	
    <!-- if not set by caller, be sure it is 'build' -->
    <property
        name="antrunnertarget"
        value="build"/>
    <fail
        unless="antrunnerfile"
        message="Must provide ant file to run"/>
    <target
        name="runAntRunner">
    	
    	<!-- long term we should make this sensitive to if already running in eclipse, and if so, 
    	just invoke the script? check if="eclipse.running"? -->
  	
        <java
            taskname="AntRunner"
            
            fork="true"
            failonerror="${failOnError}"
            
              classname="org.eclipse.equinox.launcher.Main">
              <classpath>
                  <fileset
                      dir="${eclipse.home}/eclipse/plugins">
                      <include
                          name="org.eclipse.equinox.launcher_*.jar"/>
                  </fileset>
              </classpath>

            <jvmarg 
                value="-Dosgi.instance.area=${HOME}/temp/workspace-runAntRunner-${antrunnerfile}-${antrunnertarget}" />
            <arg
                value="-application"/>
            <arg
                value="org.eclipse.ant.core.antRunner"/>
            <arg
                value="-buildfile"/>
            <arg
                value="${antrunnerfile}"/>
            <arg
                value="${antrunnertarget}"/>
        </java>
    </target>
</project>