ghc-pkg query feature request

[Brian Smith]

On 7/26/05, Simon Marlow <simonmar at microsoft.com> wrote:
> On 26 July 2005 09:23, Lennart Kolmodin wrote:
> 
> > 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?
> 
> Sure, I'll commit a patch if you send one.  Perhaps
> 
>   $ ghc-pkg list Cabal
>   Cabal-1.0 Cabal-1.1.1
> 
> would be the simplest extension?

Also, it would be nice if the package list was sorted, so that
(Cabal-1.0) comes immediately before (Cabal-1.1.1) immediately before
(Cabal-1.1.2)

- Brian