Findbugs taskdef and target

custom_rules.xml

<target name="findbugs" description="Generate the FindBugs XML report">

<fail
    message="findbugs.home is missing. Make sure to add it as an argument."
    unless="findbugs.home"
/>
  
<path id="findbugs.jar">
  <pathelement path="${findbugs.home}/lib/findbugs-ant.jar">
  </pathelement>
</path>

<taskdef name="findbugs" classname="edu.umd.cs.findbugs.anttask.FindBugsTask"
  classpathref="findbugs.jar" />
<echo>FINDBUGS_HOME = ${findbugs.home}</echo>
<mkdir dir="reports" />
<findbugs home="${findbugs.home}" output="xml"
  outputFile="reports/findbugs.xml" excludeFilter="findbugs-exclude.xml">
  <auxClasspath path="${android.jar}" />
  <class location="${basedir}/bin/classes" />
  <sourcePath path="${basedir}/src" />
  <sourcePath path="${basedir}/tests" />
</findbugs>
</target>