moar modules

lib/modules/display.nix

@@ -11,7 +11,10 @@ let
     "monitor = " + display.name +
     ", " + resToString display.resolution +
     ", " + display.position +
-    ", " + toString display.scaling;
+    ", " + toString display.scaling +
+    (if ( display.wallpaper != "" ) then ''
+      exec-once = ${pkgs.swaybg}/bin/swaybg -o ${display.name} -i ${display.wallpaper} &
+    '' else "");
 
   resolutionType = types.submodule ({ x, y, freq, ... }:
     {
@@ -52,6 +55,10 @@ let
           description = "XxY";
           default = "auto";
         };
+        wallpaper = mkOption {
+          description = "path to wallpaper";
+          default = "";
+        };
       };
     });