Split documentation into each file

modules/programs/xkb.nix

@@ -0,0 +1,31 @@
+{
+  lib,
+  options,
+  config,
+  ...
+}:
+{
+  options.mods.xkb = {
+    layout = lib.mkOption {
+      default = "dashie";
+      example = "us";
+      type = lib.types.str;
+      description = "Your layout";
+    };
+    variant = lib.mkOption {
+      default = "";
+      example = "";
+      type = lib.types.str;
+      description = "Your variant";
+    };
+  };
+  config = (
+    lib.optionalAttrs (options ? services.xserver) {
+      # Configure keymap in X11
+      services.xserver = {
+        xkb.layout = "${config.mods.xkb.layout}";
+        xkb.variant = "${config.mods.xkb.variant}";
+      };
+    }
+  );
+}