RequireJS optimizer Ant task

build.xml

<?xml version="1.0" encoding="utf-8"?>
<project name="sample-require-js" default="" basedir=".">
    
    <!-- properties -->
    
    <property name="r.js" value="_build/rjs/r.js" />
    <property name="closure.jar" value="_build/closure/compiler.jar" />
    <property name="rhino.jar" value="_build/rhino/js.jar" />
    <property name="js.build" value="_build/js.build.js" />
    <property name="css.build" value="_build/css.build.js" />
    
    <!-- custom tasks -->
    
    
    <!-- targets -->
    
    <target name="-optimize" description="Combine and minify files.">
        <java classname="org.mozilla.javascript.tools.shell.Main">
            <classpath>
                <pathelement location="${rhino.jar}" />
                <pathelement location="${closure.jar}" />
            </classpath>
            <arg value="${r.js}"/>
            <arg value="-o"/>
            <arg value="${requirejs.optimizer.settings}"/>
        </java>
        <echo message="optimized ${requirejs.optimizer.settings}" />
    </target>
    
    <target name="optimizeJS">
        <echo message="Combining and minifying JS files." />
        <antcall target="-optimize">
            <param name="requirejs.optimizer.settings" value="${js.build}" />
        </antcall>  
    </target>
    
    <target name="optimizeCSS">
        <echo message="Combining and compressing CSS files." />
        <antcall target="-optimize">
            <param name="requirejs.optimizer.settings" value="${css.build}" />
        </antcall>  
    </target>
    
</project>

css.build.js

({
    baseUrl: "../style",
    optimizeCss : "standard",
    dir: "../../../deploy/style"
})

js.build.js

({
    baseUrl: "../scripts",
    dir: "../../../deploy/scripts",
    modules: [
        {
            name: "main",
            include : [
            	"lib/my_awesome_shared_lib"
            ]
        },
        {
            name : "sections/home/main",
            exclude : [
                "lib/my_awesome_shared_lib"
            ]
        },
        {
            name : "sections/gallery/main",
            exclude : [
                "lib/my_awesome_shared_lib"
            ]
        }
    ]
})

updated example to work with 0.23+ thanks for the heads up @jlanglade