services: printing: init

Adds CUPS and avahi for printing and discovering
printers on the network.

modules/services/printing/module.nix

@@ -0,0 +1,42 @@
+{
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib.options) mkEnableOption;
+in {
+  options.modules.services.cups.enable = mkEnableOption "CUPS, the Common UNIX printing system";
+
+  config = {
+    services = {
+      # enable CUPS, the Common UNIX printing system.
+      printing = {
+        enable = true;
+
+        # Move CUPSd's temporary directory.
+        # By default, it resides in /tmp.
+        tempDir = "/tmp/cups";
+
+        # Do not advertise shared printers.
+        browsing = false;
+
+        # Enable the CUPS webinterface, accessible at localhost:631.
+        webInterface = true;
+
+        # Some local or network printers might need additional drivers.
+        #  These can be added into here.
+        drivers = [
+          pkgs.cups-kyocera-ecosys-m552x-p502x
+        ];
+      };
+
+      # Add and autodiscover printers on the network via the IPP everywhere[1] protocol.
+      # [1] https://www.pwg.org/ipp/everywhere.html
+      avahi = {
+        enable = true;
+        nssmdns4 = true;
+        openFirewall = true;
+      };
+    };
+  };
+}