nixos/ultraleap: init

Signed-off-by: Sefa Eyeoglu <[email protected]>

nixos/doc/manual/release-notes/rl-2411.section.md

@@ -194,6 +194,8 @@
 
 - [tiny-dfr](https://github.com/WhatAmISupposedToPutHere/tiny-dfr), a dynamic function row daemon for the Touch Bar found on some Apple laptops. Available as [hardware.apple.touchBar.enable](options.html#opt-hardware.apple.touchBar.enable).
 
+- [Ultraleap Hand Tracking](https://docs.ultraleap.com/), a userspace driver for Ultraleap Motion Controller hardware. Available as [services.ultraleap](#opt-services.ultraleap.enable) and integrates into Monado as [services.monado.enableUltraleap](#opt-services.monado.enableUltraleap)
+
 ## Backward Incompatibilities {#sec-release-24.11-incompatibilities}
 
 - The `sound` options have been removed or renamed, as they had a lot of unintended side effects. See [below](#sec-release-24.11-migration-sound) for details.

nixos/modules/module-list.nix

@@ -625,6 +625,7 @@
   ./services/hardware/tuxedo-rs.nix
   ./services/hardware/udev.nix
   ./services/hardware/udisks2.nix
+  ./services/hardware/ultraleap.nix
   ./services/hardware/undervolt.nix
   ./services/hardware/upower.nix
   ./services/hardware/usbmuxd.nix

nixos/modules/services/hardware/ultraleap.nix

@@ -0,0 +1,62 @@
+{ config
+, lib
+, pkgs
+, ...
+}:
+let
+  inherit (lib) getExe' mkDefault mkEnableOption mkIf mkPackageOption;
+
+  cfg = config.services.ultraleap;
+in
+{
+  options.services.ultraleap = {
+    enable = mkEnableOption "Ultraleap hand tracking service";
+
+    servicePackage = mkPackageOption pkgs "ultraleap-hand-tracking-service" { };
+    layerPackage = mkPackageOption pkgs "openxr-ultraleap-layer" { };
+  };
+
+  config = mkIf cfg.enable {
+    services.udev.packages = [ cfg.servicePackage ];
+
+    systemd.tmpfiles.settings."10-ultraleap"."/etc/ultraleap".d = {
+      user = "leap";
+      group = "leap";
+      mode = "0755";
+    };
+
+    systemd.services."ultraleap-hand-tracking-service" = {
+      description = "Ultraleap Tracking Service";
+      after = ["network.target"];
+      wantedBy = ["multi-user.target"];
+
+      environment = {
+        "LIBTRACK_IS_SERVICE" = mkDefault "1";
+      };
+
+      serviceConfig = {
+        Type = "exec";
+        ExecStart = getExe' cfg.servicePackage "leapd";
+        User = "leap";
+        Group = "leap";
+        KillMode = "process";
+        KillSignal = "SIGINT";
+        Restart = "on-failure";
+        LogsDirectory = "leap";
+      };
+    };
+
+    environment.systemPackages = [ cfg.servicePackage cfg.layerPackage ];
+    environment.pathsToLink = [ "/share/openxr" ];
+
+    users.users.leap = {
+      isSystemUser = true;
+      group = "leap";
+      # udev rules from -service grant access to plugdev
+      extraGroups = ["plugdev"];
+    };
+    users.groups.leap = {};
+  };
+
+  meta.maintainers = with lib.maintainers; [ Scrumplex pandapip1 ];
+}