Add haskell support to emacs, setup dev-shell for haskell

modules/emacs/default.el

@@ -577,6 +577,25 @@
 
 (use-package lsp-ui)
 
+;; haskell
+(use-package haskell-mode
+  :diminish subword-mode
+  :hook
+  (haskell-mode . turn-on-haskell-doc)
+  (haskell-mode . subword-mode))
+(use-package haskell
+  :ensure haskell-mode)
+(use-package haskell-font-lock
+  :ensure haskell-mode)
+(use-package lsp-haskell
+  :demand t)
+(use-package shakespeare-mode)
+(use-package company-cabal
+  :defer t
+  :init
+  (with-eval-after-load 'company
+    (add-to-list 'company-backends '(company-cabal))))
+
 ;; misc
 (use-package academic-phrases
   :defer t

modules/emacs/default.nix

@@ -1,31 +1,36 @@
-{ config, lib, pkgs, ... }:
-with lib;
-let
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
   defaultEl = ./default.el;
-  environment.systemPackages = [ pkgs.gdb ]; # use gdb for dap-mode
+  environment.systemPackages = [pkgs.gdb]; # use gdb for dap-mode
   localsettings = pkgs.writeText "local-settings.el" ''
     (defconst elss/paths/cpptools "${pkgs.unstable.vscode-extensions.ms-vscode.cpptools}/share/vscode/extensions/ms-vscode.cpptools")
     (defconst elss/paths/cpptools-program "${pkgs.unstable.vscode-extensions.ms-vscode.cpptools}/share/vscode/extensions/ms-vscode.cpptools/debugAdapters/bin/OpenDebugAD7")
     (provide 'local-settings)
   '';
 
-  defaultConfig = pkgs.runCommand "default.el" { } ''
+  defaultConfig = pkgs.runCommand "default.el" {} ''
     mkdir -p $out/share/emacs/site-lisp
     cp ${defaultEl} $out/share/emacs/site-lisp/default.el
     cp ${localsettings} $out/share/emacs/site-lisp/local-settings.el
   '';
-  emacsPackage = (pkgs.emacsPackagesFor pkgs.emacs).emacsWithPackages (epkgs:
-    let
-      lpkgs = import ./packages.nix { inherit config lib pkgs epkgs; };
+  emacsPackage = (pkgs.emacsPackagesFor pkgs.emacs).emacsWithPackages (epkgs: let
+    lpkgs = import ./packages.nix {inherit config lib pkgs epkgs;};
     #[ (defaultConfig lpkgs) ] ++ (with pkgs; [
     #  aspell
     #  emacs-all-the-icons-fonts
     #  gnupg
     #  nixpkgs-fmt
     #])
-    in [ defaultConfig ]
-    ++ [ (with epkgs.elpaPackages; [ auctex org flymake ]) ]
-    ++ (with epkgs.melpaStablePackages; [ ]) ++ (with epkgs.melpaPackages;
+  in
+    [defaultConfig]
+    ++ [(with epkgs.elpaPackages; [auctex org flymake])]
+    ++ (with epkgs.melpaStablePackages; [])
+    ++ (with epkgs.melpaPackages;
       [
         ac-helm
         academic-phrases
@@ -51,6 +56,7 @@ let
         docker-compose-mode
         flycheck
         free-keys
+        haskell-mode
         highlight-indentation
         helm
         #helm-bbdb
@@ -62,6 +68,7 @@ let
         helm-rg
         json-mode
         less-css-mode
+        lsp-haskell
         lsp-mode
         lsp-ui
         magit
@@ -87,7 +94,8 @@ let
         yaml-mode
         yasnippet
         #zenburn-theme
-      ] ++ (with lpkgs; [ org-roam-ui ligatures ])));
+      ]
+      ++ (with lpkgs; [org-roam-ui ligatures])));
 in {
   options.elss.programs.emacs.enable =
     mkEnableOption "Setup emacs package and install it";

users/ellmau/conf/xmonad/.envrc

@@ -0,0 +1 @@
+use flake