build.xml

<project name="TheRPlugin" default="plugin.zip">

  <!--dependencies-->
  <property name="dep.idea.lib.dir" value="${idea.home}/lib"/>

  <path id="dep.plugin.classpath">
    <fileset dir="${dep.idea.lib.dir}">
      <include name="annotations.jar"/>
      <include name="extensions.jar"/>
      <include name="forms_rt.jar"/>
      <include name="guava-*.jar"/>
      <include name="idea.jar"/>
      <include name="jdom.jar"/>
      <include name="openapi.jar"/>
      <include name="rt.jar"/>
      <include name="trove4j.jar"/>
      <include name="util.jar"/>
      <include name="winp-*.jar"/>
    </fileset>
  </path>

  <path id="dep.javac2.classpath">
    <fileset dir="${dep.idea.lib.dir}">
      <include name="javac2.jar"/>
      <include name="jdom.jar"/>
      <include name="asm-all.jar"/>
      <include name="jgoodies-forms.jar"/>
    </fileset>
  </path>

  <!--input-->
  <property name="in.meta-inf.dir" value="META-INF"/>

  <property name="in.sources.dir" value="src"/>
  <property name="in.generated.sources.dir" value="gen"/>

  <property name="in.resources.dir" value="resources"/>
  <property name="in.r-helpers.dir" value="r-helpers"/>

  <!--output-->
  <property name="out.dir" value="out/ant"/>

  <property name="out.classes.dir" value="${out.dir}/classes"/>
  <property name="out.jar.dir" value="${out.dir}/jar"/>
  <property name="out.zip.dir" value="${out.dir}/zip"/>

  <property name="out.jar" value="${out.jar.dir}/${ant.project.name}.jar"/>
  <property name="out.zip" value="${out.zip.dir}/${ant.project.name}.zip"/>

  <!--tasks-->
  <taskdef name="javac2" classname="com.intellij.ant.Javac2" classpathref="dep.javac2.classpath"/>

  <!--targets-->
  <target name="clean">
    <delete dir="${out.dir}"/>
  </target>

  <target name="init">
    <mkdir dir="${out.classes.dir}"/>
    <mkdir dir="${out.jar.dir}"/>
    <mkdir dir="${out.zip.dir}"/>
  </target>

  <target name="compile" depends="init">
    <javac2 srcdir="${in.sources.dir}:${in.generated.sources.dir}"
            destdir="${out.classes.dir}"
            classpathref="dep.plugin.classpath"
            source="1.6"
            target="1.6"
            includeantruntime="false"
    />
  </target>

  <target name="plugin.zip" depends="clean, compile">
    <jar destfile="${out.jar}">
      <zipfileset dir="${out.classes.dir}"/>
      <zipfileset dir="${in.resources.dir}/icons" prefix="icons"/>
      <zipfileset dir="${in.resources.dir}/inspectionDescriptions" prefix="inspectionDescriptions"/>
      <zipfileset dir="${in.meta-inf.dir}" prefix="${in.meta-inf.dir}"/>
    </jar>

    <zip destfile="${out.zip}">
      <zipfileset file="${out.jar}" prefix="${ant.project.name}/lib"/>
      <zipfileset dir="${in.r-helpers.dir}" prefix="${ant.project.name}"/>
    </zip>
  </target>

</project>