Example of how to replace a token with a variable or inline property in ANT

replaceVarANT.xml

<property name="CRONTAB_PATH" value="/some/dir/"/>

<task name="generateCrontab">
     <copy     file="crontab"
               tofile="crontabTest.txt"
               overwrite="true">
         <filterchain>
              <replacetokens>
                   <token key="cronPath" value="${CRONTAB_PATH}"/>     
               </replacetokens>      
          </filterchain>
     </copy>
</task>

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Code excerpt from http://boulderapps.co/replace-a-token-with-a-variable-using-ant
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