system/system/configuration.nix

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

let
  secrets = import ../secrets.nix;
in
{
  networking = {
    networkmanager.enable = true;

    # The global useDHCP flag is deprecated, therefore explicitly set to false here.
    # Per-interface useDHCP will be mandatory in the future, so this generated config
    # replicates the default behaviour.
    useDHCP = false;
  };

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  # Set your time zone.
  time.timeZone = "Europe/Moscow";

  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

  # console = {
  #   font = "Lat2-Terminus16";
  #   keyMap = "us";
  #   useXkbConfig = true; # use xkbOptions in tty.
  # };

  # Enable the X11 windowing system.
  services = {
    # Enable the OpenSSH daemon.
    openssh.enable = true;

    # Xmonad
    dbus = {
      enable = true;
      packages = [ pkgs.dconf ];
    };

    xserver = {
      enable = true;

      xkbModel = "pc105";
      layout = "us,us";
      xkbVariant = "dvorak,";
      xkbOptions = "grp:win_space_toggle";

      displayManager = {
        defaultSession = "none+xmonad";
      };

      windowManager.xmonad.enable = true;
    };
  };

  # Enable sound.
  sound = {
    enable = true;
    mediaKeys.enable = true;
  };

  hardware.pulseaudio = {
    enable = true;
    package = pkgs.pulseaudioFull;
  };

  programs.zsh.enable = true;

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.me = {
    isNormalUser = true;
    name = secrets.userName;
    home = secrets.userDir;
    extraGroups = [
      "wheel" # Enable ‘sudo’ for the user.
      "networkmanager"
      "docker"
    ];
    shell = pkgs.zsh;
  };

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    gnumake
    vim
    wget
  ];

  # Some programs need SUID wrappers, can be configured further or are
  # started in user sessions.
  # programs.mtr.enable = true;
  programs.gnupg.agent = {
    enable = true;
    enableSSHSupport = true;
  };

  virtualisation = {
    docker = {
      enable = true;
      autoPrune = {
        enable = true;
        dates = "weekly";
      };
    };
  };

  nix = {
    # Automate garbage collection
    gc = {
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 7d";
    };

    # To protect nix-shell against garbage collection
    # Source: https://github.com/nix-community/nix-direnv#installation
    extraOptions = ''
      keep-outputs = true
      keep-derivations = true
    '';

    settings = {
      auto-optimise-store = true;

      experimental-features = [ "nix-command" "flakes" ];

      trusted-users = [ "root" secrets.userName ];
    };
  };

  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
  # Or disable the firewall altogether.
  # networking.firewall.enable = false;

  # Copy the NixOS configuration file and link it from the resulting system
  # (/run/current-system/configuration.nix). This is useful in case you
  # accidentally delete configuration.nix.
  # system.copySystemConfiguration = true;

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "22.11"; # Did you read the comment?

}