nixos/joycond: init

NixOS should be able to support the Nintendo Switch Pro controller for
steam and non-steam at the same time. Currently there are two mutually
exclusive ways to support the Pro Controller: Steam and `hid-nintendo`.

Unfortunately these don't work together, but there's a workaround in
newer versions of `joycond` (described [here](https://wiki.archlinux.org/title/Gamepad#Using_hid-nintendo_pro_controller_with_Steam_Games_(with_joycond))). To use this
workaround `hid-nintendo` and `joycond` need to be updated, and the
systemd and udev configuration needs to be made available in NixOS.

nixos/doc/manual/from_md/release-notes/rl-2111.section.xml

@@ -321,6 +321,14 @@
           <link linkend="opt-programs.pantheon-tweaks.enable">programs.pantheon-tweaks</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://github.com/DanielOgorchock/joycond">joycond</link>,
+          a service that uses <literal>hid-nintendo</literal> to provide
+          nintendo joycond pairing and better nintendo switch pro
+          controller support.
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
   <section xml:id="sec-release-21.11-incompatibilities">

nixos/doc/manual/release-notes/rl-2111.section.md

@@ -99,6 +99,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - [pantheon-tweaks](https://github.com/pantheon-tweaks/pantheon-tweaks), an unofficial system settings panel for Pantheon. Available as [programs.pantheon-tweaks](#opt-programs.pantheon-tweaks.enable).
 
+- [joycond](https://github.com/DanielOgorchock/joycond), a service that uses `hid-nintendo` to provide nintendo joycond pairing and better nintendo switch pro controller support.
+
 ## Backward Incompatibilities {#sec-release-21.11-incompatibilities}
 
 - The `security.wrappers` option now requires to always specify an owner, group and whether the setuid/setgid bit should be set.

nixos/modules/module-list.nix

@@ -411,6 +411,7 @@
   ./services/hardware/illum.nix
   ./services/hardware/interception-tools.nix
   ./services/hardware/irqbalance.nix
+  ./services/hardware/joycond.nix
   ./services/hardware/lcd.nix
   ./services/hardware/lirc.nix
   ./services/hardware/nvidia-optimus.nix

nixos/modules/services/hardware/joycond.nix

@@ -0,0 +1,40 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.joycond;
+  kernelPackages = config.boot.kernelPackages;
+in
+
+with lib;
+
+{
+  options.services.joycond = {
+    enable = mkEnableOption "support for Nintendo Pro Controllers and Joycons";
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.joycond;
+      defaultText = "pkgs.joycond";
+      description = ''
+        The joycond package to use.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [
+      kernelPackages.hid-nintendo
+      cfg.package
+    ];
+
+    boot.extraModulePackages = [ kernelPackages.hid-nintendo ];
+    boot.kernelModules = [ "hid_nintendo" ];
+
+    services.udev.packages = [ cfg.package ];
+
+    systemd.packages = [ cfg.package ];
+
+    # Workaround for https://github.com/NixOS/nixpkgs/issues/81138
+    systemd.services.joycond.wantedBy = [ "multi-user.target" ];
+  };
+}