emacs: Install plugins from nix repositories

Maybe I should also look in to removing melpa and ensure? I could maybe
also remove elpa itself potentially? This way I could make sure that
no extra packages are ever installed that are not directly managed
through Nix. But then it would be quite annyoing to use my config
for someone not using nix. For that purpose I could maybe look in
to supporting nix on non-nixos again maybe?

modules/home/caem/development/emacs/default.nix

@@ -1,20 +1,32 @@
 { pkgs, config, ... }:
 
 let
-  # Has to be >= 29.1 due to treesitter
+  emacs-package = pkgs.emacs30-pgtk;
-  emacsPkg = "emacs30";
 in {
   services.emacs = {
     enable = true;
-    package = pkgs."${emacsPkg}";
+    package = emacs-package;
-    defaultEditor = true;
+    socketActivation.enable = true;
   };
 
   programs.emacs = {
     enable = true;
-    package = (pkgs."${emacsPkg}-pgtk".pkgs.withPackages (epkgs: [
+    package = emacs-package;
-      epkgs.treesit-grammars.with-all-grammars
+    extraPackages = epkgs: with epkgs; [
-    ]));
+      treesit-grammars.with-all-grammars
+      vterm
+      paredit
+      nix-mode
+      meson-mode
+      rainbow-delimiters
+      darktooth-theme
+      smex
+      amx
+      # Why the fuck would you put a '+' in your package's name
+      (builtins.getAttr "ido-completing-read+" epkgs)
+      no-littering
+      treesit-auto
+    ];
   };
 
   home.file."${config.xdg.configHome}/emacs".source = ./emacs.d;

modules/home/caem/development/emacs/emacs.d/core/repositories.el

@@ -6,9 +6,3 @@
 (require 'package)
 (add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
 (package-initialize)
-
-;; Doesn't exactly fit in here but it's the earliest we can call this
-(use-package benchmark-init
-  :ensure t
-  :config
-  (add-hook 'after-init-hook 'benchmark-init/deactivate))

modules/home/caem/development/emacs/emacs.d/modes/nix-mode.el

@@ -1,5 +1,8 @@
 (use-package nix-mode
   :ensure t
   :mode ("\\.nix\\'" "\\.nix.in\\'")
+  :hook
+  (nix-mode . (lambda ()
+                (paredit-mode -1)))
   :init
   (global-nix-prettify-mode 1))