Add initial emacs configuration

hosts/puter/packages.nix

@@ -11,6 +11,7 @@
     "${modules}/multimedia"
     "${modules}/desktop/gnome"
     "${modules}/communication"
+    "${modules}/development"
   ];
 }
 

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

@@ -1,6 +1,7 @@
-{ pkgs, ... }:
+{ pkgs, config, ... }:
 
 let
+  # Has to be >= 29 due to treesitter
   emacsPkg = "emacs30";
 in {
   services.emacs = {
@@ -11,6 +12,10 @@ in {
 
   programs.emacs = {
     enable = true;
-    package = pkgs."${emacsPkg}-pgtk";
+    package = (pkgs."${emacsPkg}-pgtk".pkgs.withPackages (epkgs: [
+      epkgs.treesit-grammars.with-all-grammars
+    ]));
   };
+
+  home.file."${config.xdg.configHome}/emacs".source = ./emacs.d;
 }

modules/home/caem/development/emacs/emacs.d/annoyances.el

@@ -0,0 +1,8 @@
+(setq custom-file "/dev/null")
+
+(let ((backup_dir (concat (or (getenv "XDG_CACHE_HOME") "~/.cache") "/emacs_backups")))
+  (make-directory backup_dir t)
+  (setq backup-directory-alist '(("." . backup_dir))
+	backup-by-copying t))
+
+(setq inhibit-startup-message t)

modules/home/caem/development/emacs/emacs.d/appearance.el

@@ -0,0 +1,20 @@
+(tool-bar-mode 0)
+(menu-bar-mode 0)
+(scroll-bar-mode 0)
+
+(setq display-line-numbers-type 'relative)
+(global-display-line-numbers-mode t)
+(global-hl-line-mode t)
+
+(set-frame-parameter nil 'alpha-background 90)
+(add-to-list 'default-frame-alist
+	     '(font . "Go Mono Nerd Font-12"))
+
+;; Temporary theme. Replace later.
+(use-package doom-themes
+  :ensure t
+  :config
+  (setq doom-themes-enable-bold t
+        doom-themes-enable-italic t)
+  (doom-themes-org-config)
+  (load-theme 'doom-sourcerer t))

modules/home/caem/development/emacs/emacs.d/completions.el

@@ -0,0 +1,8 @@
+(ido-mode 1)
+(ido-everywhere 1)
+
+(use-package smex
+  :ensure t
+  :bind (("M-x" . smex)
+	 ("M-X" . smex-major-mode-commands))
+  :config (smex-initialize))

modules/home/caem/development/emacs/emacs.d/init.el

@@ -0,0 +1,27 @@
+;; Set up paths so that emacs never touches ~/.config/emacs
+(let ((data-home (concat (or (getenv "XDG_DATA_HOME") "~/.local/share") "/emacs")))
+  (setq user-emacs-directory data-home
+	custom-file (expand-file-name "custom.el" data-home)
+	url-history-file (expand-file-name "url/history" data-home)
+	package-user-dir (expand-file-name "elpa" data-home)
+	boomark-default-file (expand-file-name "bookmarks" data-home)
+	recentf-save-file (expand-file-name "recentf" data-home)
+	tramp-persistent-file-name (expand-file-name "tramp" data-home)
+	auto-save-list-file-prefix (expand-file-name "auto-save-list/.saves-" data-home)
+	abbrev-file-name (expand-file-name "abbrev.el" data-home)
+	savehist-file (expand-file-name "savehist" data-home)
+	server-auth-dir (expand-file-name "server" data-home)
+	package-quickstart-file (expand-file-name "package-quickstart.elc" data-home)))
+(setq conf-home (concat (or (getenv "XDG_CONFIG_HOME") "~/.config") "/emacs"))
+
+(package-initialize)
+
+(require 'package)
+(add-to-list 'package-archives
+	     '("melpa" . "https://melpa.org/packages/") t)
+
+(load (expand-file-name "./appearance.el" conf-home))
+(load (expand-file-name "./annoyances.el" conf-home))
+(load (expand-file-name "./completions.el" conf-home))
+(load (expand-file-name "./languages.el" conf-home))
+

modules/home/caem/development/emacs/emacs.d/languages.el

@@ -0,0 +1 @@
+(mapc 'load (file-expand-wildcards (expand-file-name "./languages/*.el" conf-home)))

modules/home/caem/development/emacs/emacs.d/languages/nix.el

@@ -0,0 +1,7 @@
+(use-package nix-mode
+  :ensure t
+  :mode "\\.nix\\'")
+
+(use-package pretty-sha-path
+  :ensure t
+  :config (global-pretty-sha-path-mode 1))

modules/nixos/development/default.nix

@@ -0,0 +1,9 @@
+{ username, ... }:
+
+{
+  environment.persistence."/nix/persist" = {
+    users."${username}".directories = [
+      ".local/share/emacs"
+    ];
+  };
+}

modules/nixos/user/caem.nix

@@ -15,9 +15,6 @@
         "images"
         "videos"
         "programming"
-
-        # Temporary persist until I get a proper emacs configuration
-        ".emacs.d"
       ];
     };
   };