build.xml

<?xml version="1.0" encoding="UTF-8"?>

<project basedir="." default="build" name="appname">
  <property environment="env"/>
  <property name="gae.sdk.dir" value="/path/to/java_sdk_1.7.4"/>
  <property name="build.dir" value="war/WEB-INF/classes"/>
  <property name="debuglevel" value="source,lines,vars"/>
  <property name="target" value="1.6"/>
  <property name="source" value="1.6"/>

  <path id="gae_sdk_1.7.4.libraryclasspath">
    <pathelement location="${gae.sdk.dir}/lib/shared/appengine-local-runtime-shared.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/shared/el-api.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/shared/jsp/repackaged-appengine-ant-1.7.1.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/shared/jsp/repackaged-appengine-ant-launcher-1.7.1.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/shared/jsp/repackaged-appengine-jasper-6.0.29.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/shared/jsp/repackaged-appengine-jasper-el-6.0.29.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/shared/jsp/repackaged-appengine-tomcat-juli-6.0.29.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/shared/jsp-api.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/shared/servlet-api.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/appengine-tools-api.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/opt/user/appengine-api-labs/v1/appengine-api-labs.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/opt/user/appengine-endpoints/v1/appengine-endpoints.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/opt/user/jsr107/v1/appengine-jsr107cache-1.7.4.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/opt/user/jsr107/v1/jsr107cache-1.1.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/user/appengine-api-1.0-sdk-1.7.4.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/datanucleus-appengine-1.0.10.final.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/datanucleus-core-1.1.5.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/datanucleus-jpa-1.1.5.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/geronimo-jpa_3.0_spec-1.1.1.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/geronimo-jta_1.1_spec-1.1.1.jar"/>
    <pathelement location="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/jdo2-api-2.3-eb.jar"/>
  </path>
  <path id="appname.classpath">
    <pathelement location="${build.dir}"/>
    <path refid="gae_sdk_1.7.4.libraryclasspath"/>
    <pathelement location="war/WEB-INF/lib/slim3-1.0.16.jar"/>
    <pathelement location="war/WEB-INF/lib/aws-sdk-for-java-on-gae-1.1.7.1.jar"/>
    <pathelement location="war/WEB-INF/lib/cloudinary-java-for-gae-1.0.jar"/>
    <pathelement location="war/WEB-INF/lib/commons-codec-1.7.jar"/>
    <pathelement location="war/WEB-INF/lib/commons-io-1.4.jar"/>
    <pathelement location="war/WEB-INF/lib/commons-lang3-3.1.jar"/>
    <pathelement location="war/WEB-INF/lib/commons-logging-1.1.1.jar"/>
    <pathelement location="war/WEB-INF/lib/gson-1.4.jar"/>
    <pathelement location="war/WEB-INF/lib/jdom-1.1.3.jar"/>
    <pathelement location="war/WEB-INF/lib/jettison-1.2.jar"/>
    <pathelement location="war/WEB-INF/lib/jsonic-1.3.0.jar"/>
    <pathelement location="war/WEB-INF/lib/ktrwjr.jar"/>
    <pathelement location="war/WEB-INF/lib/rome-1.0.jar"/>
    <pathelement location="war/WEB-INF/lib/twitter4j-core-2.2.6.jar"/>
    <pathelement location="war/WEB-INF/lib/uuid-3.3.jar"/>
    <pathelement location="war/WEB-INF/lib/xerces.jar"/>
    <pathelement location="lib/slim3-gen-1.0.16.jar"/>
  </path>

  <target name="clean">
    <delete dir="${build.dir}"/>
  </target>
  <target name="init" depends="clean">
    <mkdir dir="${build.dir}"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/user/appengine-api-1.0-sdk-1.7.4.jar"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/opt/user/appengine-api-labs/v1/appengine-api-labs.jar"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/opt/user/appengine-endpoints/v1/appengine-endpoints.jar"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/opt/user/jsr107/v1/jsr107cache-1.1.jar"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/opt/user/jsr107/v1/appengine-jsr107cache-1.7.4.jar"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/datanucleus-appengine-1.0.10.final.jar"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/datanucleus-core-1.1.5.jar"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/datanucleus-jpa-1.1.5.jar"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/jdo2-api-2.3-eb.jar"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/geronimo-jpa_3.0_spec-1.1.1.jar"/>
    <copy todir="war/WEB-INF/lib" file="${gae.sdk.dir}/lib/opt/user/datanucleus/v1/geronimo-jta_1.1_spec-1.1.1.jar"/>
  </target>
  <target name="build-apt" depends="init">
    <apt debug="true" debuglevel="${debuglevel}" encoding="utf-8" destdir="${build.dir}" factorypathref="appname.classpath" compile="false" 
        srcdir="package.of.appname" preprocessdir="src" includeantruntime="false">
      <classpath refid="appname.classpath"/>
    </apt>
  </target>
  <target name="build" depends="build-apt">
    <javac debug="true" debuglevel="${debuglevel}" destdir="${build.dir}" source="${source}" target="${target}" includeantruntime="false">
      <src path="src"/>
      <classpath refid="appname.classpath"/>
    </javac>
  </target>
</project>