chore: update neovim config to use extraConfig 🎨

nixos/neovim.nix

@@ -1,11 +1,11 @@
-{ config, pkgs, ... }:
+{ pkgs, ... }:
 
 {
   programs.neovim = {
     enable = true;
     defaultEditor = true;
-    configure = {
-      customRC = ''
+    # TODO: refactor (some parts) to extraLuaConfig
+    extraConfig = ''
       set title
       set go=a
       set mouse=a
@@ -18,7 +18,6 @@
         local f = io.open(config_file, "r")
         if f ~= nil then
             local system_theme = f:read()
-              -- f:close()
             io.close(f)
             if system_theme == 'dark' then
                 vim.cmd("set bg=dark")
@@ -27,11 +26,11 @@
             else
                 print('warning: expected value "light" or "dark"')
                 print('  got:', system_theme)
-                  print('  expected path:', file)
+                print('  expected path:', config_file)
             end
         else
             print('warning: nvim color scheme not found')
-              print('  expected path:', file)
+            print('  expected path:', config_file)
         end
       EOF
 
@@ -56,10 +55,8 @@
       set spell spelllang=en_us
       setlocal spell! spelllang=en_us
     '';
-      # vimPlugins inspired from Alexnortung
-      # https://discourse.nixos.org/t/neovim-no-longer-uses-config-or-plugins/13399/4
-      packages.nix = with pkgs.vimPlugins; {
-        start = [
+
+    plugins = with pkgs.vimPlugins; [
       vim-surround  # shortcuts for setting () {} etc.
       vim-gitgutter # git diff in sign column
       # vim-airline   # nice and light status bar # doesn't work nicely with tmux
@@ -74,8 +71,5 @@
       goyo-vim      # write prose
       limelight-vim # prose paragraph highlighter
     ];
-        opt = [];
-      };
-    };
   };
 }