Something

<project name="GroovyServer" basedir="." default="main">
	    <property name="src.dir"     value="."/>

	    <property name="build.dir"   value="build"/>
	    <property name="classes.dir" value="${build.dir}/classes"/>
	    <property name="groovy-classes.dir" value="${build.dir}/groovy-classes"/>
	    <property name="jar.dir"     value="${build.dir}/jar"/>

	    <property name="main-class"  value="groovyServer.Server"/>

	    <property name="lib.dir"     value="lib"/>
	    <property name="ice.dir" value="c:/Ice-3.2.0" />
	    <property name="ice.lib.dir" value="${ice.dir}/lib" />
	    <property name="groovy.dir" value="c:/groovy-1.0" />

	    <path id="classpath">
	        <fileset dir="${lib.dir}" includes="**/*.jar"/>
	    	<fileset dir="${ice.lib.dir}" includes="*.jar"/>
	    	<fileset dir="${groovy.dir}/embeddable" includes="*.jar"/>
	    </path>
	    
	    <path id="groovy-classpath">
	        <fileset dir="${lib.dir}" includes="**/*.jar"/>
	    	<fileset dir="${ice.lib.dir}" includes="*.jar"/>
	    	<fileset dir="${groovy.dir}/embeddable" includes="*.jar"/>
	    	<pathelement location="${classes.dir}" />
	    </path>
	
		<taskdef name="groovy"
	         classname="org.codehaus.groovy.ant.Groovy"
	         classpathref="groovy-classpath"/>
		<taskdef name="groovyc"
	         classname="org.codehaus.groovy.ant.Groovyc"
	         classpathref="groovy-classpath"/>

	
	    <target name="clean">
	       <!-- <delete dir="${build.dir}"/> -->
	    </target>

	    <target name="compilej">
	        <mkdir dir="${classes.dir}"/>
	        <javac srcdir="${src.dir}" destdir="${classes.dir}" classpathref="classpath"/> 
	    </target>
	    <target name="compileg">
	        <mkdir dir="${groovy-classes.dir}"/>
			<groovyc srcdir="${src.dir}" destdir="${groovy-classes.dir}" classpathref="classpath"/> 
	    </target>
	
	    <target name="jar" depends="compilej,compileg">
	        <mkdir dir="${jar.dir}"/>
	        <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}">
	            <manifest>
	                <attribute name="Main-Class" value="${main-class}"/>
	            </manifest>
	        </jar>
	    </target>

		  <target name="run" depends="jar">
		        <groovy classname="${main-class}">
		            <classpath>
		                <path refid="classpath"/>
		                <path location="${jar.dir}/${ant.project.name}.jar"/>
		            </classpath>
		        </groovy>
		    </target>

	    <target name="clean-build" depends="clean,jar"/>

	    <target name="main" depends="clean,run"/>

</project>