<project default="build-full-jars">
  
  <property name="dest.dir" value="build/delivery/files/WEB-INF/lib"/>

  <available file="_lib" property="exists.lib"/>
  
  <target name="copy-libs" if="exists.lib">
    <copy todir="${dest.dir}" filtering="off" overwrite="true">
      <fileset dir="_lib">
        <include name="*.jar"/>
      </fileset>
    </copy>
  </target>
  
  <target name='build-full-jars'>
    <antcall target="copy-libs"/>
    <jar jarfile="${dest.dir}/${APP}.jar" basedir="build/delivery/classes"/>
  </target>

</project>