Run a task on BuildException

[anonymous]

It would be helpful to be able to execute a task if a BuildException occurs. For example, suppose a build script creates a temp directory to hold an SVN export. If the SVN export tasks fails, it would be good to be able to delete the temp directory.

Something similar to try catch block in the XML would be great, i.e.

<target name="code_export">
    <mkdir dir="..." />
    <try>
        <svnexport todir="..." />
        <catch type="BuildException">
            <!-- a specific exception -->           
        </catch>
        <catch>
            <!-- any other exception -->
            <delete dir="..." />
        </catch>
    </try>
</target>

I have read the documentation but cannot find anything related to this, so apologies if there is already something that will do the job.