custom_rules.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="shaman-custom" basedir=".">

  <dirname property="shaman-custom.basedir" file="${ant.file.shaman-custom}"/>

  <property file="${user.home}/.android/build.properties"/>

  <target name="release" depends="clean,android_rules.release,lint"/>

  <target name="lint" description="Run lint checks">
    <exec executable="lint"
          dir="${shaman-custom.basedir}"
          failonerror="true"
        >
      <arg value="--exitcode"/>
      <arg value="-Werror"/>
      <arg value="."/>
    </exec>
  </target>

  <target name="checkstyle-init" unless="checkstyle.on">
    <property name="artifacts.dir" location="${shaman-custom.basedir}/target"/>
    <available classname="com.puppycrawl.tools.checkstyle.CheckStyleTask" property="checkstyle.enabled"/>
  </target>

  <target name="checkstyle" if="checkstyle.enabled" depends="checkstyle-init">
    <taskdef resource="checkstyletask.properties"/>
    <mkdir dir="${artifacts.dir}/checkstyle"/>
    <checkstyle config="${shaman-custom.basedir}/checkstyle/shaman-checks.xml">
      <fileset dir="${shaman-custom.basedir}/src">
        <include name="**/*.java"/>
      </fileset>
      <formatter type="plain"/>
      <formatter type="xml" toFile="${artifacts.dir}/checkstyle/${project.name}-errors.xml"/>
    </checkstyle>
  </target>

</project>