Merge pull request #892 from Samasaur1/startup-chime

`system.startup.chime`: init

modules/module-list.nix

@@ -35,8 +35,10 @@
  ./system/etc.nix
  ./system/keyboard.nix
  ./system/launchd.nix
+ ./system/nvram.nix
  ./system/patches.nix
  ./system/shells.nix
+ ./system/startup.nix
  ./system/version.nix
  ./time
  ./networking

modules/system/activation-scripts.nix

@@ -69,6 +69,7 @@ in
  ${cfg.activationScripts.networking.text}
  ${cfg.activationScripts.keyboard.text}
  ${cfg.activationScripts.fonts.text}
+ ${cfg.activationScripts.nvram.text}
 
  ${cfg.activationScripts.postActivation.text}
 

modules/system/nvram.nix

@@ -0,0 +1,40 @@
+{ config, lib, pkgs, ... }:
+
+let
+ cfg = config.system;
+
+ mkNvramVariables =
+ lib.attrsets.mapAttrsToList
+ (name: value: "nvram ${lib.escapeShellArg name}=${lib.escapeShellArg value}")
+ cfg.nvram.variables;
+in
+
+{
+ meta.maintainers = [
+ lib.maintainers.samasaur or "samasaur"
+ ];
+
+ options = {
+ system.nvram.variables = lib.mkOption {
+ type = with lib.types; attrsOf str;
+ default = {};
+ internal = true;
+ example = {
+ "StartupMute" = "%01";
+ };
+ description = lib.mdDoc ''
+ Non-volatile RAM variables to set. Removing a key-value pair from this
+ list will **not** return the variable to its previous value, but will
+ no longer set its value on system configuration activations.
+ '';
+ };
+ };
+
+ config = {
+ system.activationScripts.nvram.text = ''
+ echo "setting nvram variables..." >&2
+
+ ${builtins.concatStringsSep "\n" mkNvramVariables}
+ '';
+ };
+}

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");
+ };
+}