build.xml

<project name="HashTableTester" default="dist" basedir=".">
	<description>
		simple example build file
	</description>

	<!-- set global properties for this build -->
	<property name="src" location="src"/>
	<property name="bin" location="bin"/>
	<property name="dist"  location="dist"/>
	<property environment="env"/>

	<target name="init">
		<!-- Create the time stamp -->
		<tstamp/>
		<!-- Create the bin folder used by compile -->
		<mkdir dir="${bin}"/>
    <path id="build.classpath">
      <pathelement location="${env.SCALA_HOME}/lib/scala-library.jar"   />
    </path>
    <taskdef resource="scala/tools/ant/antlib.xml">
      <classpath>
        <pathelement location="${env.SCALA_HOME}/lib/scala-compiler.jar"   />
        <pathelement location="${env.SCALA_HOME}/lib/scala-reflect.jar"/>
        <pathelement location="${env.SCALA_HOME}/lib/scala-library.jar"   />
      </classpath>
    </taskdef>
	</target>

	<target name="build" depends="init"
		description="compile the source " >
		<!-- Compile the scala code from ${src} into ${bin} -->
    <scalac srcdir="${src}"
            destdir="${bin}"
            classpathref="build.classpath">
      <include name="*.scala"   />
    </scalac>
	</target>

	<target name="dist" depends="build"
		description="package the jar" >
		<!-- Create the distribution directory -->
		<mkdir dir="${dist}"/>

		<!-- Put everything in ${bin} into the jar file -->
		<jar jarfile="${dist}/${ant.project.name}-no-scala.jar" basedir="${bin}">
			<manifest>
				<attribute name="Main-Class" value="${ant.project.name}"/>
			</manifest>
		</jar>
		<taskdef resource="proguard/ant/task.properties"
	         classpath="/usr/local/Cellar/proguard/4.8/libexec/proguard.jar" />
		<proguard>
			-injars      ${dist}/${ant.project.name}-no-scala.jar
			-injars      /usr/local/Cellar/scala/2/libexec/lib/scala-library.jar
			-outjars     ${ant.project.name}.jar
			-libraryjars ${java.home}/lib/rt.jar

			-dontwarn scala.**
			-dontnote

			-keepclasseswithmembers public class * {
			    public static void main(java.lang.String[]);
			}
		</proguard>
	</target>

	<target name="clean"
		description="clean up" >
		<!-- Delete the ${build} and ${dist} directory trees -->
		<delete dir="${bin}"/>
		<delete dir="${dist}"/>
		<delete file="${ant.project.name}.jar"/>
	</target>
</project>