ghc-pkg query feature request

[Lennart Kolmodin]

Hi!

When working with multiple versions of a package you often want to use 
   the most recent version.
A feature that would help for package systems is to be able to query 
ghc-pkg for the best version, or to list the versions in increasing 
version order.

Something like:

$ ghc-pkg best_version Cabal
Cabal-1.1.1

$ ghc-pkg versions Cabal
Cabal-1.0 Cabal-1.1.1

You get the picture. Obviously, this feature isn't critical since we 
could use 'ghc-pkg list' and work our way from there, but it would be nice.
If you like the idea we might send you a patch.
What do you think?

Cheers,
   Lennart Kolmodin

-- 
"The only thing that interferes with my learning is my education."
         -- Albert Einstein