Running Kotlin Main - Complete Ant Build

build.xml

<project name="Kotlin" default="compile">

  <property environment="env"/>
  <taskdef file="${env.KOTLIN_HOME}/build-tools/ant/src/org/jetbrains/jet/buildtools/ant/antlib.xml">
    <classpath>
      <fileset dir="${env.KOTLIN_HOME}/dist/kotlinc/lib" includes="*.jar"/>
    </classpath>
  </taskdef>

  <property name="output" value="${basedir}/dist"/>

  <target name="clean">
    <delete dir="${output}"/>
  </target>

  <target name="compile">
      <kotlinc src="${basedir}/src/main/kotlin/" output="${output}"/>
  </target>

  <path id="classpath.run">
    <pathelement path="${output}/"/>
    <pathelement path="${env.KOTLIN_HOME}/dist/kotlinc/lib/kotlin-runtime.jar"/>
  </path>

  <target name="run">
    <java classname="namespace">
      <sysproperty key="file.encoding" value="UTF-8"/>
      <classpath refid="classpath.run"/>
    </java>
  </target>

</project>