ant task reading version/author/package from debian/changelog

gistfile1.txt

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

<project name="read-debian-changelog-scripted" default="build">
	<scriptdef name="debian-changelog" language="javascript">
		<attribute name="prefix"/>
		<![CDATA[
		    importPackage(
				java.lang, 
				java.util, 
				java.io,
				javax.script
			);
			
			var prefix = attributes.get( 'prefix') || 'debian-changelog-';
		
				// read property
			var changelog = new java.util.Scanner(
				new java.io.File( "debian/changelog")
			).useDelimiter("\\Z").next();

			var version = changelog.match( /\(([^\)]+)\)/)[1];
			project.setProperty( prefix + 'version', version);
		
			var pkg = changelog.match( /^([^\s]+)/)[1];
			project.setProperty( prefix + 'package', pkg);
		
			var maintainer = changelog.match( /^ -- ([^<]+) /m)[1];
			project.setProperty( prefix + 'maintainer', maintainer);
		]]>
	</scriptdef>
		
	<target name="build">
		<debian-changelog />
		
		<echo>
debian package : ${debian-changelog-package} 
version        : ${debian-changelog-version}
maintainer     : ${debian-changelog-maintainer}
		</echo>
		
		<!-- same but with custom prefix -->
		<debian-changelog prefix="mee-"/>
				
		<echo>
debian package : ${mee-package} 
version        : ${mee-version}
maintainer     : ${mee-maintainer}
		</echo>		
	</target>
</project>