Tools

Don't install or try to use ghc-mod if you're a beginner

It's a bit fragile, more than a bit slow, and it's not worth the grief.

Emacs
- Install haskell-mode
- Install flycheck
- Enable and configure Haskell, this can be just (require 'haskell) if you don't care about anything else.
- Enable flycheck
- Symlink Stack to /usr/bin or otherwise make sure flycheck can find it
- dunzo.
Vim
- We recommend Stephen Diehl's vim instructions but we suggest replacing ghc-mod with the below for now.
- For getting type errors in vim reliably (in lieu of ghc-mod)

autocmd FileType haskell setlocal makeprg=stack\ build
autocmd FileType haskell setlocal errorformat=%f:%l:%v:%m