modules/nixos/solaar.nix


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{
  config,
  lib,
  pkgs,
  ...
}:
with lib; let
  cfg = config.nixfiles.modules.solaar;
in {
  options.nixfiles.modules.solaar = {
    enable = mkEnableOption "Solaar";
  };

  config = mkIf cfg.enable {
    hm = {
      home.packages = with pkgs; [solaar];

      systemd.user.services.solaar = {
        Unit = {
          Description = "Device manager for Logitech devices";
          After = ["graphical-session-pre.target"];
          PartOf = ["graphical-session.target"];
        };
        Service = {
          # The dirtiest hack I've ever implemented... I should be ashamed of
          # it. Regardless, that shit still doesn't work because each reconnect,
          # /dev/hidraw* is recreated and has default permissions which breaks
          # Solaar. Fuck this shit.
          ExecStartPre = let
            pkg = pkgs.writeShellApplication {
              name = "solaar-pre";
              text = ''
                for i in /dev/hidraw*; do
                  if [ -c "$i" ]; then
                    sudo chown root:input "$i"
                    sudo chmod 0660 "$i"
                  fi
                done
              '';
            };
          in "${pkg}/bin/solaar-pre";
          ExecStart = "${pkgs.solaar}/bin/solaar --window=hide";
        };
        Install.WantedBy = ["graphical-session.target"];
      };
    };

    boot.kernelModules = ["hid_logitech_dj" "hid_logitech_hidpp"];

    hardware.uinput.enable = true;

    my.extraGroups = ["uinput" "input"];
  };
}