Android ant build - removes Log.v verbose logging statements in sources

custom_rules.xml

 <?xml version="1.0" encoding="UTF-8"?>
<project name="release-custumrules">
 
 <target name="-pre-build">
        <tstamp>
            <format property="builddate" pattern="dd.MM.yyyy HH:mm:ss" locale="de,CH" />
        </tstamp>


        <if condition="${build.is.packaging.debug}">
            <then>
                <echo>Building DEBUG version</echo>
            </then>
            <else>
                <echo>Building RELEASE version - Copying release config</echo>
                <copy file="./release-config/environment.xml" tofile="./res/values/environment.xml"  overwrite="true" />
                <replace file="res/values/environment.xml" token="__buildinfo__" value="Builddate: ${builddate}" />

               <!-- remove all verbose logging statements in the source -->
                <replaceregexp
                    match="Log\.v\((.+?)\);"
                    replace="{ /* TODO VERBOSE LOG CALL REMOVED BY RELEASE BUILD */ }"
                    encoding="UTF-8"
                    flags="gis" byline="false"
                    >
                    <fileset dir="src" includes="**/*.java"/>
                </replaceregexp>
            </else>
        </if>

        <echo>Build Date: ${builddate}</echo>
        <!--  set a flag on environment.xml for build -->
        <replace file="res/values/environment.xml" token="__buildinfo__"  value="Builddate: ${builddate}" />
    </target>
    
</project>