nixify emacs

configuration.nix

@@ -65,7 +65,23 @@
 	};
 
 	home-manager.users.illustris = { ... }: {
-		home.stateVersion = "23.05";
+		home = {
+			file.".emacs.d" = {
+				source = ./emacs.d;
+				recursive = true;
+			};
+			stateVersion = "23.05";
+		};
+		programs.emacs = {
+			enable = true;
+			extraPackages = (
+				epkgs: (with epkgs; [
+					material-theme
+					nix-mode
+					color-theme-modern
+				])
+			);
+		};
 		services.gpg-agent = {
 			enable = true;
 			defaultCacheTtl = 60*60*12;

desktop-configuration.nix

@@ -12,7 +12,6 @@
 		# blender
 		dmenu
 		dunst
-		emacs
 		firefox
 		flutter
 		gimp

emacs.d/init.el

@@ -0,0 +1,43 @@
+;; Set keybindings for cycling buffers
+(global-set-key [C-prior] 'previous-buffer)
+(global-set-key [C-next] 'next-buffer)
+
+(setq mouse-yank-at-point t)
+
+(setq load-prefer-newer t)
+
+(setq-default c-basic-offset 8
+	tab-width 8
+	indent-tabs-mode t)
+
+(global-set-key (kbd "C-x k") 'kill-this-buffer)
+(put 'scroll-left 'disabled nil)
+
+(load-theme 'cobalt t t)
+(enable-theme 'cobalt)
+
+(defun toggle-indentation ()
+	"Toggle between tabs and spaces for indentation."
+	(interactive)
+	(if indent-tabs-mode
+		(progn
+			(setq-local indent-tabs-mode nil)
+			(setq-local tab-width 2)
+		)
+		(progn
+			(setq-local indent-tabs-mode t)
+			(setq-local tab-width 8)
+		)
+	)
+	(message "Indentation set to: %s" (if indent-tabs-mode "tabs" "spaces"))
+)
+
+(eval-after-load 'nix-mode
+	(add-hook 'nix-mode-hook
+		(lambda ()
+			(define-key nix-mode-map (kbd "<f8>") 'toggle-indentation)
+			(setq-local indent-tabs-mode t)
+			(setq-local tab-width 8)
+		)
+	)
+)