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Asked: 2026-05-11T03:29:39+00:00

There must be an easy way to do this. I build a Flex app

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There must be an easy way to do this. I build a Flex app using ant that depends on a SWC library, which works fine except that it rebuilds the library whether it needs to or not. How do I tell ant to only run the task if any of the sources files of the library (*.as, *.mxml) are newer than the SWC?

I’ve looked at <dependset> but it only seems to delete files, not determine whether a task should be run or not. <depend> seems to expect a one-to-one relationship between the source and target files rather than a one-to-many relationship — I have many input files and one output file, but no intermediate object files.

Thanks a lot, Alex

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1 Answer

  1. You may use the Ant uptodate task to create a property, and execute your other target only if that property is set.

    I don’t know much about flex, but you probably want something like this:

    <?xml version='1.0' encoding='UTF-8'?> <project name='test' default='compile'>     <target name='checkforchanges'>       <uptodate property='nochanges'>          <srcfiles dir='.' includes='**/*.as'/>          <srcfiles dir='.' includes='**/*.mxml'/>          <mapper to='applicaton.flex'/>       </uptodate>    </target>     <target name='compile' depends='checkforchanges' unless='nochanges'>       ...    </target>  </project>
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