From 0363c18c3704c44d4a282ecbd1455b325bc37a77 Mon Sep 17 00:00:00 2001
From: Sam <30577766+Samasaur1@users.noreply.github.com>
Date: Tue, 27 Feb 2024 17:21:19 -0800
Subject: [PATCH 1/2] `system.nvram`: init (internal)

---
 modules/module-list.nix               |  1 +
 modules/system/activation-scripts.nix |  1 +
 modules/system/nvram.nix              | 40 +++++++++++++++++++++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 modules/system/nvram.nix

diff --git a/modules/module-list.nix b/modules/module-list.nix
index a75b3233b..66440a1ae 100644
--- a/modules/module-list.nix
+++ b/modules/module-list.nix
@@ -35,6 +35,7 @@
   ./system/etc.nix
   ./system/keyboard.nix
   ./system/launchd.nix
+  ./system/nvram.nix
   ./system/patches.nix
   ./system/shells.nix
   ./system/version.nix
diff --git a/modules/system/activation-scripts.nix b/modules/system/activation-scripts.nix
index 67d69bed7..68e01b592 100644
--- a/modules/system/activation-scripts.nix
+++ b/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}
 
diff --git a/modules/system/nvram.nix b/modules/system/nvram.nix
new file mode 100644
index 000000000..efc9c9980
--- /dev/null
+++ b/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}
+    '';
+  };
+}

From ee53e5785c437aa2e836c6ce3b9fbf3936bf511e Mon Sep 17 00:00:00 2001
From: Sam <30577766+Samasaur1@users.noreply.github.com>
Date: Tue, 27 Feb 2024 17:22:41 -0800
Subject: [PATCH 2/2] `system.startup.chime`: init

---
 modules/module-list.nix    |  1 +
 modules/system/startup.nix | 31 +++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 modules/system/startup.nix

diff --git a/modules/module-list.nix b/modules/module-list.nix
index 66440a1ae..b9959c0cb 100644
--- a/modules/module-list.nix
+++ b/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
diff --git a/modules/system/startup.nix b/modules/system/startup.nix
new file mode 100644
index 000000000..ecbef4606
--- /dev/null
+++ b/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");
+  };
+}