base: Finally, some emacs on darwin (and some other stuff I guess)

modules/nixos/base/emacs/linux-init.el

@@ -0,0 +1,21 @@
+(use-package emacs-on-linux
+  :ensure nil ;; Not a real package, but a place to collect global settings for linux
+  :demand t
+  :config
+  ;; Font configuration
+  (defun font-settings ()
+    "Setup font settings."
+    (when window-system (set-frame-font "Hack 9"))
+    (set-fontset-font t 'symbol "Noto Color Emoji")
+    (set-fontset-font t 'symbol "Symbola" nil 'append))
+  ;; Make sure DISPLAY is set correctly in env.
+  (defun display-env-hack ()
+    "Hack DISPLAY env variable back into env."
+    (setenv "DISPLAY" ":0")
+    )
+  (if (daemonp)
+      (progn
+        (add-hook 'server-after-make-frame-hook #'font-settings)
+        (add-hook 'server-after-make-frame-hook #'display-env-hack))
+    (font-settings))
+  )