xml - Apache ant buildfile looping -


lord of beginners here.

i'm trying make target in build.xml restarts when meets condition. i've searched high , low , can't come solution make target...well...loop. i'm stuck on , it's driving me crazy, welcomed.

edit: target want loop:

<target name="prog" description="executes program">             <parallel>                       <daemons>                         <exec executable="mch" />                 </daemons>             </parallel>      <exec executable="calculator" inputstring="$var">         <redirector output="log.txt" />     </exec>     <delete file="log.txt" /> </target>

the executable creates file when closes without finishing. loop condition if file exists or not.

could use waitfor task checkevery

https://ant.apache.org/manual/tasks/waitfor.html

sounds similar example on task page

<waitfor maxwait="3" maxwaitunit="minute" checkevery="500">         <http url="http://localhost/myapp/index.html"/> </waitfor> waits 3 minutes (and checks every 500 milliseconds) web server on localhost     serve specified url.

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