Add nix lang support to v4

lisp/fg42/editor.el

@@ -29,18 +29,12 @@
   (require 'fg42/langs/verilog)
   (require 'fg42/langs/python)
   (require 'fg42/langs/elisp)
+  (require 'fg42/langs/nix)
   (require 'fg42/wm))
 
-
 (require 'server)
 (require 'fg42/modeline)
 
-;; (require 'fg42/utils)
-;; (require 'fg42/modeline)
-;; (require 'fg42/cubes/modeline)
-;; (require 'fg42/themes)
-;; (require 'fg42/project)
-
 (defvar fg42/font '("Fira Mono" 12)
   "Font name and size to be used with FG42. (Default (\"Fira Mono\" 12).")
 

lisp/fg42/langs/nix.el

@@ -0,0 +1,36 @@
+;;; FG42 --- The mighty editor for the emacsians -*- lexical-binding: t; -*-
+;;
+;; Copyright (c) 2010-2024 Sameer Rahmani & Contributors
+;;
+;; Author: Sameer Rahmani <lxsameer@gnu.org>
+;; URL: https://devheroes.codes/FG42/FG42
+;; Version: 3.0.0
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+;;
+;;; Commentary:
+;;; Code:
+(eval-when-compile
+  (require 'fpkg))
+
+(use! nix-mode
+  "Nix language support for Emacs."
+  :mode "\\.nix\\'"
+  :hook
+  (nix-mode . eglot-ensure)
+  (nix-mode . company-mode)
+  (nix-mode . flyspell-prog-mode))
+
+(provide 'fg42/langs/nix)
+;;; nix.el ends here

nix/fg42.nix

@@ -90,8 +90,11 @@ let
     python3Packages.flake8
   ]) ++ (lib.optional supportVerilog [
     svls
+  ]) ++ (lib.optional (supportVerilog && stdenv.isLinux) [
+    # SystemC is required by verilator that at the
+    # moment is only available on Linux
     verilator
-  ]) ++ (lib.optional supportWM [
+  ]) ++ (lib.optional (supportWM && stdenv.isLinux) [
     # Window manager supports works on Linux only
     xorg.xhost
   ]);