From 6ea803da80558e269564c99070e92e285cf977ff Mon Sep 17 00:00:00 2001
From: Quentin Aristote <quentin@aristote.fr>
Date: Sat, 11 Feb 2023 17:18:54 +0100
Subject: add personal nixos modules

---
 modules/nixos/hardware.nix | 70 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 modules/nixos/hardware.nix

(limited to 'modules/nixos/hardware.nix')

diff --git a/modules/nixos/hardware.nix b/modules/nixos/hardware.nix
new file mode 100644
index 0000000..71d48a4
--- /dev/null
+++ b/modules/nixos/hardware.nix
@@ -0,0 +1,70 @@
+{ config, lib, pkgs, ... }:
+
+let cfg = config.personal.hardware;
+in {
+  options.personal.hardware = {
+    usb.enable = lib.mkEnableOption "usb";
+    disks.crypted = lib.mkOption {
+      type = with lib.types; nullOr str;
+      default = null;
+      description = "Path to the encrypted disk.";
+    };
+    firmwareNonFree.enable = lib.mkEnableOption "non-free firmwares";
+    keyboard = {
+      keyMap = lib.mkOption {
+        type = lib.types.str;
+        default = "fr";
+      };
+    };
+    backlights = let
+      mkBacklightOption = name:
+        lib.mkOption {
+          type = with lib.types; nullOr str;
+          default = null;
+          description =
+            "Whether to allow all users to change hardware the ${name} brightness.";
+        };
+    in {
+      screen = mkBacklightOption "screen";
+      keyboard = mkBacklightOption "keyboard";
+    };
+    sound.enable = lib.mkEnableOption "sound";
+  };
+
+  config = lib.mkMerge [
+    {
+      hardware.firmware =
+        lib.optional cfg.firmwareNonFree.enable pkgs.firmwareLinuxNonfree;
+      boot.initrd = {
+        availableKernelModules = lib.optional cfg.usb.enable "usb_storage";
+        luks.devices = lib.optionalAttrs (cfg.disks.crypted != null) {
+          crypt = {
+            name = "crypt";
+            device = cfg.disks.crypted;
+            preLVM = true;
+          };
+        };
+      };
+
+      services.udev.extraRules =
+        lib.optionalString (cfg.backlights.screen != null) ''
+          ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="${cfg.backlights.screen}", MODE="0666", RUN+="${pkgs.coreutils}/bin/chmod a+w /sys/class/backlight/%k/brightness"
+        '' + lib.optionalString (cfg.backlights.keyboard != null) ''
+          ACTION=="add", SUBSYSTEM=="leds", KERNEL=="${cfg.backlights.keyboard}", MODE="0666", RUN+="${pkgs.coreutils}/bin/chmod a+w /sys/class/leds/%k/brightness"
+        '';
+    }
+
+    (lib.mkIf cfg.sound.enable {
+      sound.enable = true;
+      hardware.pulseaudio = {
+        enable = true;
+        support32Bit = true;
+        package = pkgs.pulseaudioFull;
+        extraConfig = ''
+          load-module module-dbus-protocol
+        '';
+      };
+      nixpkgs.config.pulseaudio = true;
+    })
+  ];
+}
-- 
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