Replace laptop module with battery

hardware/battery.nix

···
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  # https://gist.github.com/balacij/492d27776ad7d3cde3e0b0ce0bc3a3f8/11a61171828fa0f76cd403686773c3d455d2c652
+  services.udev.extraRules = lib.mkIf config.services.desktopManager.gnome.enable ''
+    SUBSYSTEM=="power_supply",ENV{POWER_SUPPLY_ONLINE}=="0",RUN+="${pkgs.power-profiles-daemon}/bin/powerprofilesctl set power-saver"
+    SUBSYSTEM=="power_supply",ENV{POWER_SUPPLY_ONLINE}=="1",RUN+="${pkgs.power-profiles-daemon}/bin/powerprofilesctl set performance"
+  '';
+}

hardware/cpu/amd.nix

···
 
 {
   imports = [
-    ./common.nix
-
     nixos-hardware.nixosModules.common-cpu-amd
   ];
 

hardware/cpu/common.nix

···
-{ isLaptop, ... }:
-
-{
-  #services.auto-cpufreq.enable = isLaptop; # TODO
-}

hardware/cpu/intel.nix

···
 
 {
   imports = [
-    ./common.nix
-
     nixos-hardware.nixosModules.common-cpu-intel
   ];
 

hardware/laptop.nix

···
-{
-  # TODO: Power management, mostly
-}

lib/mkSystem.nix

···
     }
   ]
   ++ builtins.attrValues inputs.encode42-packages.nixosModules
-  ++ lib.optional isLaptop ../hardware/laptop.nix
+  ++ lib.optionals isLaptop [
+    ../hardware/battery.nix
+  ]
   ++ extraModules;
 
   specialArgs = {