modules/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 = getExe (
            pkgs.writeShellApplication {
              name = "solaar-pre";
              text = ''
                for i in /dev/hidraw*; do
                  if [ -c "$i" ]; then
                    sudo chown root:input "$i"
                    sudo chmod 0660 "$i"
                  fi
                done
              '';
            }
          );
          ExecStart = "${getExe pkgs.solaar "solaar"} --window=hide";
        };
        Install.WantedBy = [ "graphical-session.target" ];
      };
    };

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

    hardware.uinput.enable = true;

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