svn info | grep "Last Changed Rev" | grep -ior "[0-9]*"
You can use copy task. http://ant.apache.org/manual/Tasks/copy.html
abc.template.xml:
<abc version="@VERSION@">
<item name="xxxxx"/>
</abc>ant_script:
<copy file="abc.template.xml"
tofile="abc.xml"
filtering="yes" overwrite="yes">
<filterset>
<filter token="VERSION" value="1.0"/>
</filterset>
</copy>