feat: emacs - format nix files via alejandra

home/base/desktop/editors/emacs/default.nix

@@ -74,7 +74,7 @@ in {
     }
 
     (mkIf pkgs.stdenv.isLinux (
-    # Do not use emacs-nox here, which makes the mouse wheel work abnormally
+    # Do not use emacs-nox here, which makes the mouse wheel work abnormally in terminal mode.
     let emacsPkg = pkgs.emacs29; in
     {
       home.packages = [emacsPkg];
@@ -86,6 +86,7 @@ in {
     }))
 
     (mkIf pkgs.stdenv.isDarwin (
+    # Do not use emacs-nox here, which makes the mouse wheel work abnormally in terminal mode.
     let emacsPkg = pkgs.emacs29; in
     {
       home.packages = [emacsPkg];

home/base/desktop/editors/emacs/doom/config.el

@@ -123,6 +123,14 @@
 (after! markdown-mode
   (global-font-lock-mode 0))
 
+;; use alejandra to format nix files
+(use-package lsp-nix
+  :ensure lsp-mode
+  :after (lsp-mode)
+  :demand t
+  :custom
+  (lsp-nix-nil-formatter ["alejandra"]))
+
 ;; fix yaml highlighting for catppuccin theme
 ;; https://github.com/catppuccin/emacs/issues/55
 (add-hook 'yaml-mode-hook