dotfiles/system/nixos/configuration.nix

{ inputs, pkgs, system }:

let
  pkgsUnstable = inputs.nixpkgs-unstable.legacyPackages."${system}";

  configure-gtk = pkgs.writeTextFile {
    name = "configure-gtk";
    destination = "/bin/configure-gtk";
    executable = true;
    text =
      let
        schema = pkgs.gsettings-desktop-schemas;
        datadir = "${schema}/share/gsettings-schemas/${schema.name}";
      in
      ''
        export XDG_DATA_DIRS=${datadir}:$XDG_DATA_DIRS
        gnome_schema=org.gnome.desktop.interface
        gsettings set $gnome_schema gtk-theme 'Breeze Dark'
      '';
  };

  username = "opdavies";
in
{
  nixpkgs = {
    config = {
      allowUnfree = true;
    };
  };

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

  systemd.extraConfig = ''
    DefaultTimeoutStopSec=10s
  '';

  # networking.hostName = "nixedo"; # 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;

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

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

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

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

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

    displayManager = {
      defaultSession = "none+i3";
      lightdm.enable = true;
    };

    windowManager.i3 = {
      enable = true;
      package = pkgs.i3-gaps;
      extraPackages = with pkgs; [ i3status i3lock i3blocks ];
    };
  };

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

  services.avahi.enable = true;
  services.avahi.nssmdns = true;
  services.avahi.openFirewall = true;
  services.printing.enable = true;

  # Enable sound with pipewire.
  sound.enable = true;
  hardware.pulseaudio.enable = true;
  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;

  users.users.${username} = {
    isNormalUser = true;
    description = "Oliver Davies";
    extraGroups = [ "docker" "networkmanager" "wheel" ];
    packages = with pkgs; [ ];
  };

  security.sudo.wheelNeedsPassword = false;

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs;
    [
      brightnessctl
      configure-gtk
      ffmpegthumbnailer
      shotwell
      xfce.thunar
      xfce.thunar-volman
      xfce.tumbler

      # Games.
      zeroad
    ];

  # 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 = "22.11"; # Did you read the comment?

  virtualisation.docker.enable = true;

  programs.zsh.enable = true;
  programs.zsh.histSize = 5000;

  users.defaultUserShell = "/etc/profiles/per-user/${username}/bin/zsh";

  fonts = {
    fontconfig = {
      enable = true;
      defaultFonts = {
        monospace = [ "JetBrainsMono Nerd Font Mono" ];
      };
    };
    packages = with pkgsUnstable; [
      (nerdfonts.override {
        fonts = [
          "AnonymousPro"
          "FiraCode"
          "IntelOneMono"
          "Iosevka"
          "JetBrainsMono"
          "Meslo"
        ];
      })
    ];
  };

  zramSwap.enable = true;

  nix = {
    gc = {
      automatic = true;
      dates = "weekly";
      options = "--delete-older-than 30d";
    };

    optimise.automatic = true;

    settings = {
      auto-optimise-store = true;
      experimental-features = [ "nix-command" "flakes" ];
      warn-dirty = false;
    };
  };

  # Make Caps lock work as an Escape key on press and Ctrl on hold.
  services.interception-tools =
    let
      dfkConfig = pkgs.writeText "dual-function-keys.yaml" ''
        MAPPINGS:
          - KEY: KEY_CAPSLOCK
            TAP: KEY_ESC
            HOLD: KEY_LEFTCTRL
      '';
    in
    {
      enable = true;
      plugins = pkgs.lib.mkForce [ pkgs.interception-tools-plugins.dual-function-keys ];
      udevmonConfig = ''
        - JOB: "${pkgs.interception-tools}/bin/intercept -g $DEVNODE | ${pkgs.interception-tools-plugins.dual-function-keys}/bin/dual-function-keys -c ${dfkConfig} | ${pkgs.interception-tools}/bin/uinput -d $DEVNODE"
          DEVICE:
            NAME: "AT Translated Set 2 keyboard"
            EVENTS:
              EV_KEY: [[KEY_CAPSLOCK, KEY_ESC, KEY_LEFTCTRL]]
      '';
    };

  system.autoUpgrade = {
    allowReboot = true;
    enable = true;
    flake = "nixedo";
  };

  services.gvfs.enable = true;

  programs.gnupg.agent = {
    enable = true;
    enableSSHSupport = true;
    pinentryFlavor = "qt";
  };

  programs.firefox = {
    enable = true;
    languagePacks = [ "en-GB" ];
    package = pkgs.firefox-devedition;
    preferences = {
      "intl.accept_languages" = "en-GB, en";
      "intl.regional_prefs.use_os_locales" = true;
    };
  };

  services.udev.extraRules = ''
    KERNEL=="hidraw*", SUBSYSTEM=="hidraw", MODE="0660", TAG+="uaccess", TAG+="udev-acl", GROUP="realet"
  '';

  services.auto-cpufreq.enable = true;
}