Listing 3 Hand-crafted Ant tasks that can be called as part of Maven’s build lifecycle

<project name="SubversionTasks" basedir="." default="help">

    <!-- Date: 2006-04-27
          Developer: Craig Caulfield
          Description: some basic Subversion operations that are executed 
                when required as part of a CruiseControl build loop. -->

    <!--  These incoming parameters are set as properties (-Dname=value) 
          when this build file is invoked. -->
    <fail message="svn.repository.URL parameter must be set." 
          unless="svn.repository.URL"/>
    <fail message="svn.repository.name parameter must be set." 
          unless="svn.repository.name"/>
    <fail message="svn.repository.subproject parameter must be set." 
          unless="svn.repository.subproject"/>    
    <!-- An optional parameter: svn.copy.type will be either tags or 
          branches. Set to BLANK by default. -->
    <property name="svn.copy.type" value="BLANK"/>
    
    <property name="checkout.dir" value="checkout/${svn.repository.subproject}"/>
        
    <tstamp>
        <format property="copy.message.date" pattern="yyyy-MM-d hh:mm aa"/>
        <format property="copy.file.date" pattern="yyyyMMdhhmm"/>
    </tstamp>
 
<!--  -->

    <target name="help" description="Describes the basic usage of this 
     build file.">
  
        <echo message="Executes some basic Subversion commands (currently 
         update and copy) when required by a controlling CruiseControl 
         build loop."/>      
        <echo message="Usage: ant [ant options] 
         -Dsvn.repository.URL=value -Dsvn.repository.name=value 
         -Dsvn.repository.subproject=value [svn-update | svn-copy]"/>
        <echo message=" "/>
        <echo message="    svn.repository.URL                   
         For example, http://snagglepuss/svn"/>
        <echo message="    svn.repository.name                  
         For example, DEVELOPER"/>
        <echo message="    svn.repository.subproject            
         For example, SunDeveloper"/>
        <echo message="    svn.copy.type                         
         For example, tags OR branches (only needed for the svn-copy task)"/>
      
    </target>

    <target name="svn-update" description="Executes an SVN update operation.">

        <!-- Make sure the checkout directory exists. -->
        <condition property="verify.svn.command">            
            <available file="${checkout.dir}" type="dir"/>            
        </condition>
        <fail message="ERROR: the update directory (${checkout.dir}) 
         doesn't exist." unless="verify.svn.command"/>
    
        <!-- Update the local working copy with the latest from SVN -->
        <property name="svn.update.statement" value="update 
         ${checkout.dir}"/>
        <echo message="${svn.update.statement}"/>
        <exec executable="svn">
            <arg line="${svn.update.statement}"/>
        </exec>

    </target>

    <target name="svn-copy" description="Create a branch or tag from 
     the current head revision.">

        <condition property="valid.svn.copy.parameter">
            <or>
                <equals arg1="${svn.copy.type}" arg2="tags"/>
                <equals arg1="${svn.copy.type}" arg2="branches"/>
            </or>
        </condition>
        <fail message="ERROR: svn.copy.type = "${svn.copy.type}", 
          but this parameter must be either tags or branches." 
         unless="valid.svn.copy.parameter"/>
    
        <!-- Create a branch or tag from the current head revision. -->
        <property name="copy.from" 
         value="${svn.repository.URL}/${svn.repository.name}/ \
         trunk/${svn.repository.subproject}"/>
        <property name="copy.to" 
         value="${svn.repository.URL}/${svn.repository.name}/ \
         ${svn.copy.type}/${svn.repository.subproject}${copy.file.date}"/>
        <property name="copy.message" value=""Successful build. 
         Copied by CruiseControl at ${copy.message.date}""/>
        <property name="svn.copy.statement" value="copy ${copy.from} 
         ${copy.to} --message ${copy.message}"/>

        <echo message="${svn.copy.statement}"/>
        <exec executable="svn">
            <arg line="${svn.copy.statement}"/>
        </exec>

    </target>

    <!-- Add any more Subversion commands below here. -->

</project>