On 26/03/14 22:40, John M. Dlugosz wrote:

I'm learning Haskell as a background activity, and just wanted to introduce myself and get the list subscription stuff sorted out.

My primary machine runs Windows 7. I have Haskell Platform working OK including GCHi-Win, but could not get Lekseh to work. However, trying that showed me the world of Cabel, and I have yet to find an introduction/tutorial on that. The Haskell Platform comes with some libraries, but doesn't have a Cabel tool or anything I'd reconize as a repository, like Lekseh was setting up.

Hi. Firstly, the tools in question are called ‘Leksah’ and ‘Cabal’ (note the ‘a’ as the second from last letter). Regarding your questions, there is a Cabal user guide at [1]. I don't know for sure but I imagined that Haskell Platform comes with Cabal. There are two thinks people think of when they say Cabal: there is Cabal the library and cabal-install, the binary. You can find very quick demonstration of cabal-install at [2] although I'm sure that the user guide covers it. cabal-install is the actual tool that will go out to the world and fetch packages for you. Normally to run cabal-install, we simply run the ‘cabal’ command. I see that Leksah is on Hackage which means that in theory, one should be able to just invoke ‘cabal install leksah’. I don't know how usable it is today so if you somehow fail to install it or don't like it, I'd advise looking at getting a plugin for Haskell for your existing editor. I don't know about vim but a popular choice for Haskell is haskell-mode. See the Haskell wiki page on emacs if you're interested[3]. Hopefully Leksah works just fine for you.

It's said that the best feature of Perl is CPAN. I suppose Cabel is Haskell's equivalent of that, or aims to be. So, what's up with that? Starting from a blank prompt (that can run ghc successfully) now what?

I can't say whether it's like CPAN but from the vague memory of using CPAN a along time ago, I think it would be, yes.

—John

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[1]: http://www.haskell.org/cabal/users-guide/ [2]: http://www.haskell.org/haskellwiki/Cabal-Install [3]: http://www.haskell.org/haskellwiki/Emacs -- Mateusz K.