{ config, lib, pkgs, ... }: let cfg = config.programs.qgroundcontrol; in { options = { programs.qgroundcontrol = { enable = lib.mkEnableOption "qgroundcontrol"; package = lib.mkPackageOption pkgs "qgroundcontrol" {}; blacklistModemManagerFromTTYUSB = lib.mkOption { type = lib.types.bool; default = true; description = '' Disallow ModemManager from interfering with serial connections that QGroundControl might use. Note that if you use a modem that's connected via USB, you might want to disable this option. ''; }; }; }; config = lib.mkIf cfg.enable { # ModemManager is known to interfere with serial connections; # QGC recommends disabling it, but we don't want to if we can avoid it # Instead, we blacklist tty devices using udev rules, which is a more targeted approach services.udev = lib.mkIf cfg.blacklistModemManagerFromTTYUSB { enable = true; extraRules = '' # nixos/qgroundcontrol: Blacklist ttyUSB devices from ModemManager SUBSYSTEM=="tty", KERNEL=="ttyUSB*", ENV{ID_MM_DEVICE_IGNORE}="1" ''; }; # Security wrapper security.wrappers.qgroundcontrol = { source = lib.getExe cfg.package; owner = "root"; # Sensible default; not setuid so this is not a security risk group = "tty"; setgid = true; }; }; meta.maintainers = pkgs.qgroundcontrol.meta.maintainers; }