Error while installing new packages with GHC 7.4.1

[Brent Yorgey]

On Wed, Feb 29, 2012 at 08:02:11PM -0500, Albert Y. C. Lai wrote:
> 
> It is possible to fish the output of "cabal install --dry-run -v3
> hoogle" for why array-0.3.0.3 is brought in. It really is fishing,
> since the output is copious and of low information density. Chinese
> idiom: needle in ocean (haystack is too easy). Example:
> 
> "selecting hoogle-4.2.8 (hackage) and discarding Cabal-1.1.6, 1.2.1,
> 1.2.2.0,
> 1.2.3.0, 1.2.4.0, 1.4.0.0, 1.4.0.1, 1.4.0.2, 1.6.0.1, 1.6.0.2, 1.6.0.3,
> 1.14.0, blaze-builder-0.1, case-insensitive-0.1,"
> 
> We see that selecting hoogle-4.2.8 causes ruling out Cabal 1.14.0
> 
> Similarly, the line for "selecting Cabal-1.12.0" mentions ruling out
> array-0.4.0.0

I wonder about the possibility of making a simple tool to parse the
output of cabal install -v3 and visualize/organize it in some sort of
way to make this process easier.  What might such
visualization/organization look like?

-Brent