Add nix support to emacs.

ansible/roles/emacs/files/elisp/lang-nix.el

@@ -0,0 +1,22 @@
+(require 'common-lsp)
+(require 'util-tree-sitter)
+
+(use-package nix-mode
+  :mode (("\\.nix\\'" . nix-mode)
+         )
+  :commands nix-mode
+  :hook (
+         (nix-mode . (lambda ()
+                             ;; (eglot-ensure)
+                             ;; (defclass my/eglot-nix (eglot-lsp-server) ()
+                             ;;   :documentation
+                             ;;   "Own eglot server class.")
+
+                             ;; (add-to-list 'eglot-server-programs
+                             ;;              '(nix-mode . (my/eglot-nix "nixd")))
+                             ;; (add-hook 'before-save-hook 'eglot-format-buffer nil 'local)
+                             ))
+         )
+  )
+
+(provide 'lang-nix)

ansible/roles/emacs/files/init.el

@@ -36,4 +36,6 @@
 
 (require 'lang-xml)
 
+(require 'lang-nix)
+
 (load-directory autoload-directory)

ansible/roles/emacs/meta/main.yaml

@@ -7,3 +7,5 @@ dependencies:
     when: 'emacs_flavor == "full"'
   - role: terraform
     when: 'emacs_flavor == "full"'
+  - role: nix
+    when: 'emacs_flavor == "full"'