[TxMt] Using custom command completion

[Michail Pishchagin]

Hi,

I'm trying to customize the completion with my custom Ruby script. In  
order to do this I've created a custom Preference item in my bundle  
with a specific scope.

{	completionCommand = '"${TM_BUNDLE_SUPPORT}/bin/ 
completion_command.rb"';
	disableDefaultCompletion = 1;
}

And this way surprisingly it doesn't work, because $TM_BUNDLE_SUPPORT  
seems to be undefined for measly preference items. Should I file a  
bug report or is there any work-around? ;-)

-Michail