Bryan O'Sullivan
Pardon me while I veer off-topic, but you could also use Pandoc to do this. No forking required. http://sophos.berkeley.edu/macfarlane/pandoc/
What I'm doing is neither Haskell nor Markdown specific; I allow any HTML markup filter that plays nice with the direct HTML I also write (a restriction I could easily drop), and I cooperate with language-specific library doc generators such as Haddock. For all the fuss one reads about Haskell-not-as-fast-as-C, it's amusing how sluggish Markdown.pl is. Someone should write a small BSD'd Haskell version as example code for programming in Haskell. I may, although I can't see myself writing anything called "SmartyPants". I admire pandoc and I allow its use as an alternative to Markdown.pl, as an external command. I don't want to link it into my code because * It is GPL'd and I'm writing BSD'd code * It is a library that does not come with GHC. * It is twice the length of my code so far. The Hackage/Cabal universe takes the perspective that one is a committed Haskell user, and one wants the same diversity of tools enjoyed, say, in the Perl universe. When one uses Haskell to write a tool whose use is standalone and not Haskell-specific, there's a very good chance that someone will come along and try to build it for a new platform, installing and using GHC for the first time in order to do so. The barrier to entry is easily doubled if one has to also figure out how to obtain libraries that do not come automatically with GHC. Plenty of us have the moxie to install a package like GHC for a single use, because we've heard that "hackers" can do such things easily, but we don't really want to join each treehouse. I've installed versions of, say, Perl, Python, Ruby, even if there was a possibly lame installation already present. Still, their package systems generally left me fuming. I know my audience; we mathematicians can be smart and incredibly stupid at the same time.