Emacs

Credits

• https://github.com/tmphey
• @nymeron#8182

This guide assumes that you've completed the steps described in Prerequisites.

1. If you're using nix-shell, make sure you launch your editor from the command line so it can inherit $PATH
2. Install haskell-mode via M-x RET package-install RET haskell-mode RET
3. Install lsp-mode via M-x RET package-install RET lsp-mode RET
4. Install lsp-haskell via M-x RET package-install RET lsp-haskell RET
5. Edit your .emacs file

   (require 'lsp)
   (require 'lsp-haskell)
   ;; Hooks so haskell and literate haskell major modes trigger LSP setup
   (add-hook 'haskell-mode-hook #'lsp)
   (add-hook 'haskell-literate-mode-hook #'lsp)
   

6. Close the editor and re-open it in the project folder

   cd <your-projects-dir>
   emacs .
   

   Note: if you're using nix-shell, make sure to run it first.

If everything is fine you should get auto-completion and other features working 🎉