add arguments for ghci command line about haskell-mode

[chrisdone]

Where are you putting the .ghci file? Try with:

.ghci:

putStrLn ".ghci works!"

In the same directory as your .cabal file. Then when you start the process, have a look in the *haskell-process-log* buffer and do a search for “.ghci works”, it should be in there. If not, seems your ghci or cabal-dev differs to mine in some way. Which would be surprising, but we would need to address that with some elisp-level configuration as you suggest. Let me know.

[vagifverdi]

My .ghci works fine. Putting command line in it does not work (probably not supported ?) I tried outside of emacs.
:set -Llib -lpdf
has no effect.

And yes, putStrLn ".ghci works!", fires up fine.

[chrisdone]

Ah, I understand. The -L and -l have no effect from the .ghci file, though everything else in the .ghci file runs.

How would you like to specify project-specific options to the inferior Haskell process?

[vagifverdi]

Perhaps when it starts asking questions about cabal folder etc. one of the questions could be ghci arguments. With default (enter) nothing. One thing though, params must be a list, not a string.

I made it work like this: haskell-process.el

(defcustom haskell-process-ghci-args nil
"Args for ghci"
:group 'haskell
:type '(choice string (repeat string)))

and then

(apply 'start-process (haskell-session-name session)
nil
haskell-process-path-ghci haskell-process-ghci-args)

and in my init file:

(custom-set-variables
'(haskell-process-ghci-args (list "-Llib" "-lpdf"))
)

but this is global, not per project.

I tried to pass one string "-Llib -lpdf". But that does not work. It must be a list.
I do not know how you gonna do it. Take one string and then split it by spaces, or repeatedly ask arguments until the first empty one.

[vagifverdi]

Even better would be to fix cabal to accept -L -l from .ghci.

[chrisdone]

You mean GHCi?

[vagifverdi]

ah yes :) ghci

[vagifverdi]

actually here's the thing. I already have these options in .cabal file. I'm not sure if you are reading them and passing them to ghci. But if you are maybe you can read these options form cabal file :
extra-lib-dirs: lib
extra-libraries: pdf

This would be ideal, no need for extra questions.

[chrisdone]

cabal-dev ghci should handle that. Does it not?

[vagifverdi]

i do not use cabal-dev. hmm perhaps i should.