improve documentation for the haskell-process-type defcustom

[nurpax]

It'd be great if the doc string for haskell-process-type would provide a bit more info on what the available choices mean.

The options are: ghci, cabal-repl, cabal-dev, cabal-ghci

I'm guessing that cabal-repl means to use the new cabal "cabal repl" feature. But what is the difference between cabal-repl and cabal-ghci?

Ẁhat about cabal-dev? Is that still needed?

I would send a pull request for this, but unfortunately I'm not 100% sure how one should use this.

Another documentation idea would be to explain what is the recommended way to setup haskell-interactive-mode for various workflows. For example, how should one get set up for a workflow where all I want is just load a .cabal file, hit C-c C-c and build the project. This would probably be better placed on http://github.com/haskell/haskell-mode/README.md (or in the manual?).

While I've been able to use haskell-interactive-mode quite successfully this way, I'm not sure if I'm using this mode in the intended way. Normally this doesn't matter so much, but when hitting bugs/problems, it's hard to know whether I'm seeing a bug in the haskell-mode or if I have just setup my Emacs configuration in some funny way.

[ivan-m]

I think cabal-ghci is another package...

Maybe wait until after a Haskell Platform release is available that contains cabal-install-1.18 (with sandbox and repl support) and then deprecate cabal-ghci?

I don't know if there's any reason why one would use cabal-dev now over cabal-repl.

[hvr]

See also discussion in #198 which hinted at dropping support for everything but cabal-repl and ghci.

[nurpax]

All makes sense. Seems like everything else than cabal-repl and ghci should be dropped. Any reason to wait until the next HP - isn't it pretty typical for users to do cabal install cabal-install to upgrade cabal after HP installation?

I think it'd still make sense to document this defcustom. Should be easier now that we're left with only two options. ;)

[gracjan]

There are two options now only ghci and cabal repl. I hope they are obvious enough to not require extra documentation.

Meanwhile we are going to write some documentation anyway, but as part of general documentation process, so I'm closing this ticket.