NIX_System_Configurations/common/configuration.nix

{ config, pkgs, lib, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./modules/packages.nix
    ];

  # Bootloader.
  boot.loader = {
    timeout = 1;
    systemd-boot.enable = true;
    efi.canTouchEfiVariables = true;
  };

  boot.plymouth.enable = true;
  # start kernel in quiet output mode
  boot.kernelParams = ["amdgpu.sg_display=0"];

  # clean temp dir on every boot
  boot.tmp.cleanOnBoot = true;

  # newest kernel
  boot.kernelPackages = pkgs.linuxPackages_testing;
  # set mainline kernel version
  #boot.kernelPackages = pkgs.linuxKernel.packages.linux_6_5;
  # set specific kernel version
  #boot.kernelPackages = pkgs.linuxPackagesFor (pkgs.linux_6_6.override {
  #  argsOverride = rec {
  #    src = pkgs.fetchurl {
  #          url = "mirror://kernel/linux/kernel/v6.x/linux-${version}.tar.xz";
  #          sha256 = "sha256-c9T2rY3WrCpB7VLCkoiYt8PyUZ7V29sRkgIJo2mZt34=";
  #    };
  #    version = "6.6.2";
  #    modDirVersion = "6.6.2";
  #    };
  #});


  # Enable networking
  networking.networkmanager.enable = true;

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

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

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "de_AT.UTF-8";
    LC_IDENTIFICATION = "de_AT.UTF-8";
    LC_MEASUREMENT = "de_AT.UTF-8";
    LC_MONETARY = "de_AT.UTF-8";
    LC_NAME = "de_AT.UTF-8";
    LC_NUMERIC = "de_AT.UTF-8";
    LC_PAPER = "de_AT.UTF-8";
    LC_TELEPHONE = "de_AT.UTF-8";
    LC_TIME = "de_AT.UTF-8";
  };

  # Enable the X11 windowing system.
  services.xserver.enable = true;

  # Enable the GNOME Desktop Environment.
  services.xserver.displayManager.gdm.enable = true;
  services.xserver.desktopManager.gnome.enable = true;

  # Configure keymap in X11
  services.xserver = {
    layout = "at";
    xkbVariant = "";
  };

  # Enable CUPS to print documents.
  services.printing.enable = true;

  # Enable sound with pipewire.
  sound.enable = true;
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.lukas = {
    isNormalUser = true;
    description = "Lukas Heiligenbrunner";
    extraGroups = [ "networkmanager" "wheel" "docker"];
  };

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  users.defaultUserShell = pkgs.zsh;
 
  nix.settings.experimental-features = [ "nix-command" "flakes" ];

  # automatically delete older generations and keep last 5
  nix.settings.auto-optimise-store = true;
  nix.gc.automatic = true;
  nix.gc.dates = "daily";
  nix.gc.options = "--delete-older-than 3d";
  system.activationScripts.text =
  ''
    # keep only last 5 generations
    #nix-env --delete-generations +5 -p /nix/var/nix/profiles/system
  '';

  # 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 = "23.11"; # Did you read the comment?

}