Add the printer at work

This doesn't look great, but it works. Maybe I'll try to improve it later.

modules/nixos/default.nix

@@ -3,6 +3,7 @@
 
   imports = [
     ../fonts
+    ./printing
   ];
 
   home-manager = {

modules/nixos/printing/default.nix

@@ -0,0 +1,24 @@
+{ pkgs, ... }:
+{
+  services.printing = {
+    enable = true;
+    drivers = [ pkgs.ghostscript ];
+  };
+
+  hardware.printers = {
+    ensureDefaultPrinter = "UiO-Print-Ricoh";
+    ensurePrinters = [
+      {
+        name = "UiO-Print-Ricoh";
+        location = "https://print.uio.no";
+        deviceUri = "ipps://mobilityprint.uio.no:9164/printers/UiO-Print";
+        model = "drv:///sample.drv/generic.ppd";
+        ppdOptions = {
+          "PageSize" = "A4";
+          "Duplex" = "DuplexNoTumble";
+          "auth-info-required" = "username,password";
+        };
+      }
+    ];
+  };
+}