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nix-configuration/modules/system/system.nix

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Nix

# System options
{
pkgs,
config,
lib,
...
}:
let
cfg = config.aux.system;
in
{
options = {
aux.system = {
packages = lib.mkOption {
description = "Additional system packages to install. This is just a wrapper for environment.systemPackages.";
type = lib.types.listOf lib.types.package;
default = [ ];
example = lib.literalExpression "[ pkgs.firefox pkgs.thunderbird ]";
};
corePackages = lib.mkOption {
description = "Minimum set of packages to install.";
type = lib.types.listOf lib.types.package;
default = with pkgs; [
# Courtesy of https://discourse.nixos.org/t/how-to-use-other-packages-binary-in-systemd-service-configuration/14363
bash
coreutils
dconf
direnv
git
gnutar
gzip
home-manager
openssh
sudo
xz.bin
# Packages required for decrypting config files
transcrypt
openssl
xxd
];
};
powerManagement.enable = lib.mkEnableOption "Enables power management, e.g. for laptops.";
};
};
config = {
# Install base packages
environment.systemPackages = cfg.corePackages ++ cfg.packages;
# Configure power management via auto-cpufreq
# https://github.com/AdnanHodzic/auto-cpufreq
programs.auto-cpufreq.enable = cfg.powerManagement.enable;
services = {
# Automatically set the timezone based on location
automatic-timezoned.enable = true;
geoclue2.enableDemoAgent = lib.mkForce true;
# Enable fwupd (firmware updater)
fwupd.enable = true;
# Allow systemd user services to keep running after the user has logged out
logind.killUserProcesses = false;
# Enable disk monitoring
smartd = {
enable = true;
autodetect = true;
notifications = {
wall.enable = true;
mail = lib.mkIf config.aux.system.services.msmtp.enable {
enable = true;
mailer = "/run/wrappers/bin/sendmail";
sender = "${config.networking.hostName}@${config.secrets.networking.domains.primary}";
recipient = config.secrets.users.aires.email;
};
};
};
};
# Enable visual updates
system.activationScripts.diff = {
supportsDryActivation = true;
text = ''
${pkgs.nvd}/bin/nvd --nix-bin-dir=${pkgs.nix}/bin diff /run/current-system "$systemConfig"
'';
};
# Limit logout stop timer duration to 30 seconds
systemd.user.extraConfig = ''
DefaultTimeoutStopSec=30s
'';
# Select internationalisation properties.
i18n = {
defaultLocale = "en_US.UTF-8";
extraLocaleSettings = {
LC_ADDRESS = "en_US.UTF-8";
LC_IDENTIFICATION = "en_US.UTF-8";
LC_MEASUREMENT = "en_US.UTF-8";
LC_MONETARY = "en_US.UTF-8";
LC_NAME = "en_US.UTF-8";
LC_NUMERIC = "en_US.UTF-8";
LC_PAPER = "en_US.UTF-8";
LC_TELEPHONE = "en_US.UTF-8";
LC_TIME = "en_US.UTF-8";
};
};
};
}