svnrevision.xml

<project>
  <!-- Get subversion revision and whether the working dir is dirty
       with regard to the repository. (Since subversion tasks are
       still not standard with ant, use exec) -->

  <macrodef name="do-svnrevision">
    <sequential>
      <mkdir dir="build"/>
      <exec executable="svn" output="build/svnstatus">
        <arg value="status"/> 
        <arg value="-u"/>
        <arg value="-q"/>
      </exec>
      
      <condition property="svn.clean" value="1" else="0">
        <length file="build/svnstatus" when="equal" length="0"/>
      </condition>
      
      <exec executable="svn" output="build/svninfo">
        <arg value="info"/>
        <arg value="--xml"/>
      </exec>
      
      <loadfile property="svn.revid" srcFile="build/svninfo">
        <filterchain>
          <striplinebreaks/>           
          <replaceregex pattern=".*&lt;entry " replace=""/>
          <replaceregex pattern='.*revision="*([0-9]+)".*' replace="\1"/>
        </filterchain>
      </loadfile>
      <condition property="svn.revision" value="${svn.revid}" else="dirty">
        <equals arg1="${svn.clean}" arg2="1" />
      </condition>
    </sequential>
  </macrodef>
</project>