add printing and libreoffice

modules/desktop/printing.nix

@@ -0,0 +1,23 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: let
+  isEnabled = config.my.desktop.enablePrinting;
+in {
+  options.my.desktop.enablePrinting = lib.mkEnableOption "printing";
+
+  config = lib.mkIf isEnabled {
+    services = {
+      # Enable CUPS to print documents.
+      printing.enable = true;
+      
+      avahi = {
+        enable = true; # runs the Avahi daemon
+        nssmdns = true; # enables the mDNS NSS plug-in
+        openFirewall = true; # opens the firewall for UDP port 5353
+      };
+    };
+  };
+}