ui/update-site/build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="project" default="default">

	<target name="default" description="Creates the composite update site that forwards to the actual update site">
		<delete>
			<fileset dir="${basedir}">
				<include name="composite*.jar" />
			</fileset>
		</delete>

		<p2.composite.repository>
			<repository location="file:/${basedir}" name="JDT UI Tools" />
			<add>
				<repository location="http://archive.eclipse.org/jdt/ui/update-site" />
			</add>
		</p2.composite.repository>
	</target>
</project>