shell completion support for optparse/optik

hi greg

i've just had an idea, not sure if it's already been discussed for your optik 
package, just wondering what you think:

i was thinking that given that the parser has a pretty complete description of 
the input parameters, it would probably be possible to write a single bash 
function for all optparse-using programs, to perform completion by invoking 
the program with a particular option, something like "--perform-complete";  
the option parser, given it has seen that option, instead of returning, would 
return the completion string to the shell.  this way all the programs that 
use optparse would get shell completion support automatically!  wouldn't that 
rock?

also, to deal with the arguments, we could give it some object/method to deal 
with completion for the arguments, say something like this::

      parser = optparse.OptionParser(\
                  complete=optparse.GlobCompletion(['*.tar.gz', '*.tar.bz2'])  

one could create other completion methods as well.

any thoughts?  do you think this is implementable?
any ideas?

cheers,


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