NixOS/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’).

#Access Internet using:
#nmcli device wifi list
#nmcli device wifi connect <ssid> password <password>
# or if no password (open wifi)
#nmcli device wifi connect <ssid>

#Nix flake file limit: ulimit -n 500000

{ config, pkgs, ... }:
{

  #Assign Swap to the PC
  #swapDevices = [{
  #  device = "/swapfile";
  #  size = 16 * 1024; # 16GB
  #}];

  imports =
    [
      ./hardware-configuration.nix
    ];

  # Bootloader.
  boot.loader = {
    systemd-boot.enable = false;
    efi.canTouchEfiVariables = true;
    #boot.loader.efi.efiSysMountPoint = "/boot/efi";

    grub = {
      enable = true;
      device = "/dev/sda";		#Needs to be changed when using a new computer! (Make grub partition - look below!)
      #devices = [ "nodev" ];
      efiSupport = true;
      useOSProber = true;
    };

    grub2-theme = {
	    enable = true;
	    theme = "whitesur";
	    footer = true;
    };

    timeout = 10;
  };
  
  #Ensure there is a grub_bios partition: (gparted)
  #Create a new parititon. File System: Unformatted - Size: ~5 Mib
  #Apply
  #Manage flags -> Add bios_grub

  networking.hostName = "nixos";
  # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # 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;

  networking.extraHosts = ''
    100.89.141.79 tail-rpi
  '';

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

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

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "de_DE.UTF-8";
    LC_IDENTIFICATION = "de_DE.UTF-8";
    LC_MEASUREMENT = "de_DE.UTF-8";
    LC_MONETARY = "de_DE.UTF-8";
    LC_NAME = "de_DE.UTF-8";
    LC_NUMERIC = "de_DE.UTF-8";
    LC_PAPER = "de_DE.UTF-8";
    LC_TELEPHONE = "de_DE.UTF-8";
    LC_TIME = "de_DE.UTF-8";
  };
  
  # List services that you want to enable:
  services = {
    ollama = {
      enable = true;
      # Optional: load models on startup
      #loadModels = [ ... ];
    };

    locate = {
      enable = true;
      package = pkgs.plocate;
    };

    tailscale = {
      enable = true;
      extraUpFlags = [
          "--operator=${builtins.getEnv "USER"}"
          "--accept-routes"
      ];
    };
    
    #Enable CUPS to print documents.
    printing.enable = true;
    
    xserver = {
      enable = true;
      xkb = {
	    layout = "de";
	    variant = "";
      };

    ## Enable sound with pipewire.
    #services.pulseaudio.enable = false;
    };

    displayManager.sddm = {
      enable = true;
      theme = "breeze";
      wayland.enable = true;
    };

    # Enable the OpenSSH daemon.
    openssh.enable = true;
  };

  fonts.packages = with pkgs; [
    font-awesome
    nerd-fonts.jetbrains-mono
    meslo-lgs-nf
  ];

  #In order for dynamically linked executables to work
  programs.nix-ld.enable = true;

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

#  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.cookiez = {
    isNormalUser = true;
    description = "Cookiez";
    extraGroups = [ "networkmanager" "wheel" "docker" ];
    packages = with pkgs; [
      #User Packages Here
    ];
  };

  virtualisation.docker.enable = true;

  environment.etc."gitconfig".text = ''
    [init]
      defaultBranch = main
  '';

  #So no user in the group Wheel has to input the password in order to use sudo
  security.sudo.wheelNeedsPassword = false;  
    
  # #Install firefox.
  #programs.firefox.enable = true;
  #Enabled in a separate firefox.nix

  #Allow Nix Commands
  nix.settings.experimental-features = [ "nix-command" "flakes" ];

  #To allow the Flake to build all packages (Too many open files error)
  #systemd.services.nix-deamon.serviceConfig.LimitNOFILE = 100000;
  
  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  # 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;
  # };
  
  environment.variables = {
  	EDITOR = "nvim";
  	# XKB_DEFAULT_LAYOUT = "de";
  };

  # 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 = "25.05"; # Did you read the comment?
}