[Haskell] company-ghc and hindent not working for a new user

[gregwebs]

I am using ghc 7.8 on Ubuntu Linux. I installed all the Haskell dependencies (using stackage lts-2.8 for all the dependencies that would install through lts.

I enabled the haskell layer in my ~/.spacemacs

  (haskell :variables haskell-enable-shm-support t
                         haskell-enable-ghci-ng-support t
                         haskell-enable-hindent-style "andrew-gibiansky"
                         haskell-enable-company-mode t

On master, when I open a Haskell file I see the error

Error in post-command-hook (evil-mode-check-buffers): (void-function haskell-indentation-disable-show-indentation)

So I had switched to the develop branch on which I can actually edit a Haskell file.

When emacs opens I don't see any errors in the logs other than something about aspell.

When I open a Haskell file, I see this in the logs:

File mode specification error: (void-function electric-indent-local-mode)

When I do something like hit return in insert mode I see this error

haskell-mode-suggest-indent-choice: You tried to do an indentation command, but an indentation mode has not been enabled yet.

company-ghc-diagnose shows company mode is not configured

* company-ghc backend not found
* automatic scan module is disabled.
  You need to run either 'M-x company-ghc-turn-on-autoscan' once
  or 'M-x company-ghc-scan-modules' when it is necessary.
* ghc-boot process has not been done

I am stuck in a state where I have much less functionality than I had with Vim. Any help is greatly appreciated.

[syl20bnr]

First, install aspell to resolve the issue with aspell, it could prevent other hooks to be executed.
What version of Emacs do you use ?

[syl20bnr]

Linking it to an oooooooooold issue #9. I should fix this in the next few days.

[gregwebs]

Is there information for resolving the aspell issue? apt-get install aspell tells me it is already installed.

[syl20bnr]

Verify on a terminal if you can execute aspell and then if Emacs can see it by typing :!aspell.

[gregwebs]

Those both work. The only error I actually see is:

Error while loading 50dictionaries-common: Symbol's value as variable is void: debian-aspell-only-dictionary-alist

But then later it seems to indicate it is working

Starting new Ispell process [aspell::english] ...

[DNNX]

I'm experiencing a similar issue. company-ghc diagnostics gives me this:

* company-ghc backend not found
* automatic scan module is disabled.
  You need to run either 'M-x company-ghc-turn-on-autoscan' once
  or 'M-x company-ghc-scan-modules' when it is necessary.
* ghc-boot process has not been done

Module                                  Alias               Candidates
-------------------------------------------------------------------------------

Can't see any errors related to aspell though. I tried to run aspell in terminal and :!aspell in spacemacs - both time these commands printed aspell usage help, which I think is expected behaviour. BTW, I used stackage as well, just like @gregwebs . The only difference is that I used lts-2.9 rather than 2.8. Not sure if it matters though.

[pseudonom]

I ran into the same problem with Ubuntu's default emacs 24.3. Installing emacs 24.5 from source fixed it.

[martinmr]

I ran into this problem but I already had version 24.5.

What I did was to move the line

  (add-to-list 'exec-path "~/.cabal/bin/")

from dotspacemacs/init to dotspacemacs/config.

[d12frosted]

README file now says that you need to place (add-to-list 'exec-path "~/.cabal/bin/") in dotspacemacs/user-config instead of dotspacemacs/user-init on development branch. So that should resolve described problems.
@TheBB pinging you 😄