{ lib, pkgs, ... }:

{
  boot.initrd.supportedFilesystems = [ "ext4" "btrfs" "ext2" "ext3" "vfat" ];
  # useful emergency utils
  boot.initrd.extraUtilsCommands = ''
    copy_bin_and_libs ${pkgs.btrfs-progs}/bin/btrfstune
  '';
  boot.kernelParams = [ "boot.shell_on_fail" ];
  # other kernelParams:
  #   "boot.trace"
  #   "systemd.log_level=debug"
  #   "systemd.log_target=console"

  # hack in the `boot.shell_on_fail` arg since that doesn't always seem to work.
  boot.initrd.preFailCommands = "allowShell=1";

  # default: 4 (warn). 7 is debug
  boot.consoleLogLevel = 7;

  boot.loader.grub.enable = lib.mkDefault false;
  boot.loader.generic-extlinux-compatible.enable = lib.mkDefault true;

  # non-free firmware
  hardware.enableRedistributableFirmware = true;
  services.fwupd.enable = true;

  # powertop will default to putting USB devices -- including HID -- to sleep after TWO SECONDS
  powerManagement.powertop.enable = false;

  services.logind.extraConfig = ''
    # don’t shutdown when power button is short-pressed
    HandlePowerKey=ignore
  '';

  # services.snapper.configs = {
  #   root = {
  #     subvolume = "/";
  #     extraConfig = {
  #       ALLOW_USERS = "colin";
  #     };
  #   };
  # };
  # services.snapper.snapshotInterval = "daily";
}