[Haskell-cafe] Re: Rewriting a famous library and using the same name: pros and cons

Jeremy Shaw writes:

On Tue, Jun 8, 2010 at 7:06 PM, Ivan Lazar Miljenovic wrote:

...

I recall having a discussion with either you or someone else from the happstack team about why it isn't applicable there, but the QuickCheck problem can be solved in the general case by having its dependency be a compile-time-only option which is disabled by default.

Not really. Cabal likes to recompile things, and it won't remember that I compiled another library with quickcheck enabled. So if library B depends on library A with quickcheck enabled, it may still happen that after I install library A with quickcheck enabled, cabal will decide to recompile A again when building library B, and it will build A without quickcheck, causing B to fail...

You of course mean cabal-install, not Cabal when talking about recompiling things (I know, I'm being picky, but still...). Also, that problem is the reason why I recognise that for happstack can't at the moment have the QuickCheck dependency optional. -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com