NixConfigLaptops/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, lib, ... }:

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

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  boot.loader.efi.efiSysMountPoint = "/boot/efi";
  
  networking.hostName = "nixoslaptop"; # Define your hostname.
  #networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
  
  networking.wireless.networks = {
  gy-sedan14-wpa2 = {                # Hidden SSID
    hidden = true;
    psk = "xxxYYYxxx";
  };
  };

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

  # Enable networking
  networking.networkmanager.enable = true;

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

  # Select internationalisation properties.
  i18n.defaultLocale = "de_DE.utf8";

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

  # Enable the KDE Plasma Desktop Environment.
  services.xserver.displayManager.sddm.enable = true;
#  services.xserver.displayManager.sddm.autoLogin.enable = true;
#  services.xserver.displayManager.sddm.autoLogin.user = "SuS";
  services.xserver.desktopManager.plasma5.enable = true;

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

  # Configure console keymap
  console.keyMap = "de";

  # 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;
    # If you want to use JACK applications, uncomment this
    #jack.enable = true;

    # use the example session manager (no others are packaged yet so this is enabled by default,
    # no need to redefine it in your config for now)
    #media-session.enable = true;
  };

  # Enable touchpad support (enabled default in most desktopManager).
  # services.xserver.libinput.enable = true;

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.lokoala = {
    isNormalUser = true;
    description = "Lokaler Koala";
    extraGroups = [ "networkmanager" "wheel" ];
    initialPassword = "test";
    packages = with pkgs; [
    ];
  };

    users.users.SuS = {
    isNormalUser = true;
    isSystemUser = false;
    home = "/home/SuS";
    description = "SuS";
    extraGroups = [ ];
    initialPassword = "SuS";
    packages = with pkgs; [

#  thunderbird
    ];
  };  

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

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    vim
    wget
    firefox
kate
texmaker
libreoffice-still
bluej
greenfoot
cura
blender
micro
openscad
git

  ];


  # 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;
  # };

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  # services.openssh.enable = true;
  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
  # Or disable the firewall altogether.
  # networking.firewall.enable = false;

  # 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 = "22.05"; # Did you read the comment?

# code von hier https://github.com/NixOS/nixpkgs/blob/nixos-22.11/nixos/modules/system/boot/tmp.nix :

  with lib;

let
  cfg = config.boot;
in
{

  ###### interface

  options = {

    boot.cleanTmpDir = mkOption {
      type = types.bool;
      default = false;
      description = lib.mdDoc ''
        Whether to delete all files in {file}`/tmp` during boot.
      '';
    };

    boot.tmpOnTmpfs = mkOption {
      type = types.bool;
      default = false;
      description = lib.mdDoc ''
         Whether to mount a tmpfs on {file}`/tmp` during boot.
      '';
    };

    boot.tmpOnTmpfsSize = mkOption {
      type = types.oneOf [ types.str types.types.ints.positive ];
      default = "50%";
      description = lib.mdDoc ''
        Size of tmpfs in percentage.
        Percentage is defined by systemd.
      '';
    };

  };

  ###### implementation

  config = {

    # When changing remember to update /tmp mount in virtualisation/qemu-vm.nix
    systemd.mounts = mkIf cfg.tmpOnTmpfs [
      {
        what = "tmpfs";
        where = "/tmp";
        type = "tmpfs";
        mountConfig.Options = concatStringsSep "," [ "mode=1777"
                                                     "strictatime"
                                                     "rw"
                                                     "nosuid"
                                                     "nodev"
                                                     "size=${toString cfg.tmpOnTmpfsSize}" ];
      }
    ];

    systemd.tmpfiles.rules = optional config.boot.cleanTmpDir "D! /tmp 1777 root root";

  };

}