patch: --enable-tests and --only-dependencies

[Andres Löh]

[If you got multiple copies of this, then sorry -- I had to sort with
which address I'm actually subscribed to cabal-devel.]

>> The way to handle tests for named packages would be to add a
>> PackageConstraint for tests the way is already done for flags, but
>> this is a lot more work because it would require getting deep into the
>> dependency solver. However, it would make it easy to set the config
>> flags during build for explicit targets so we could implement a test
>> auto-run feature.
>
> When I rewrote the solver, I was actually surprised that test flags
> are sort of bypassing the solver. I don't think it would be all that
> difficult to build it into the new solver properly, *if* I'd know what
> properly means. So if you can specify a reasonable behaviour you'd
> expect from the solver, I can try to implement it.
>
> Cheers,
>  Andres

-- 
Andres Löh, Haskell Consultant
Well-Typed LLP, http://www.well-typed.com