nixos/kryoflux: init

nixos/modules/hardware/kryoflux.nix

@@ -0,0 +1,33 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.programs.kryoflux;
+
+in
+{
+  options.programs.kryoflux = {
+    enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = ''
+        Enables kryoflux udev rules, ensures 'floppy' group exists. This is a
+        prerequisite to using devices supported by kryoflux without being root,
+        since kryoflux device descriptors will be owned by floppy through udev.
+      '';
+    };
+    package = lib.mkPackageOption pkgs "kryoflux" { };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.udev.packages = [ cfg.package ];
+    environment.systemPackages = [ cfg.package ];
+    users.groups.floppy = { };
+  };
+
+  meta.maintainers = with lib.maintainers; [ matthewcroughan ];
+}