Way to get current revision as keyword...?

I have some code which wants to display the current version of the software,
including the SVN revision that the code comes from. We currently use:

  push(@EXTRA_VERSION, ( 'r' . qw{$LastChangedRevision: 109718 $ updated by SVN}[1] ));

such that @EXTRA_VERSION gets "r109718" added to it. However, I'd
really like the version to be the actually revision number of the tree
(r109813), not the revision number for the last time that specific piece of
code was modified.

ie: the keyword would be updated upon checkout, update, export, etc.

There doesn't seem to be a way to do this without a post-co/export/etc script
to mangle that line. Am I missing something blazingly obvious, or is this
a RFE?

Thanks. :)

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