box-o-sand/practicing-processing/build.xml

<project name="practicing-processing" basedir="." default="jar">
  <property environment="env" />

  <target name="envcheck">
    <exec executable="./bin/prochome-check" failonerror="true" />
  </target>

  <target name="jar" depends="build" description="Jar Up All The Things">
    <jar destfile="lib/mbh-processing-practice.jar" basedir="build" />
  </target>

  <target name="build" depends="envcheck" description="Build All The Things">
    <javac srcdir="src" destdir="build" includeantruntime="false" debug="on">
      <classpath>
        <pathelement location="${env.PROCESSING_HOME}/lib/pde.jar" />
        <pathelement location="${env.PROCESSING_HOME}/lib/core.jar" />
        <pathelement location="${env.PROCESSING_HOME}/java/lib/tools.jar" />
        <pathelement location="${env.PROCESSING_HOME}/java/lib/rt.jar" />
      </classpath>
    </javac>
  </target>

  <target name="clean" description="Delete built stuff">
    <delete>
      <fileset dir="build" includes="**/*.class" />
    </delete>
  </target>
</project>