system.startup.chime: init

modules/module-list.nix

@@ -38,6 +38,7 @@
  ./system/nvram.nix
  ./system/patches.nix
  ./system/shells.nix
+ ./system/startup.nix
  ./system/version.nix
  ./time
  ./networking

modules/system/startup.nix

@@ -0,0 +1,31 @@
+{ config, lib, pkgs, ... }:
+
+let
+ cfg = config.system.startup;
+in
+
+{
+ meta.maintainers = [
+ lib.maintainers.samasaur or "samasaur"
+ ];
+
+ options = {
+ system.startup.chime = lib.mkOption {
+ type = with lib.types; nullOr bool;
+ default = null;
+ example = false;
+ description = lib.mdDoc ''
+ Whether to enable the startup chime.
+
+ By default, this option does not affect your system configuration in any way.
+ However, this means that after it has been set once, unsetting it will not
+ return to the old behavior. It will allow the setting to be controlled in
+ System Settings, though.
+ '';
+ };
+ };
+
+ config = {
+ system.nvram.variables."StartupMute" = lib.mkIf (cfg.chime != null) (if cfg.chime then "%00" else "%01");
+ };
+}