dotfiles/nixos/hosts/kanbaru.nix

#
# Per-system configuration for Kanbaru (Suruga).
#
# vim: et:ts=2:sw=2:
#
{
  config,
  lib,
  pkgs,
  deprekages,
  modulesPath,
  fetchFromGitHub,
  ...
}:
{
  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];

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

  # Networking.
  networking.hostName = "kanbaru";
  networking.networkmanager.enable = true;
  networking.firewall.enable = false;

  # This is a local machine, rather than our typical network-accesed ones.
  # Run an ssh-agent locally.
  programs.ssh.startAgent = true;

  environment.systemPackages = [
    pkgs.nvitop
  ];

  #
  # Niri configuration for our monitors.
  #
  home-manager.users.deprekated.programs.niri.settings = {
    outputs."eDP-1".scale = 1.5;
  };

  # Override stylix font sizes.
  stylix.fonts.sizes.desktop = lib.mkForce 18;

  #
  # Intel+NVIDIA / prime setup.
  #

  services.xserver.videoDrivers = [ "nvidia" ];

  # Set up the NVIDIA half of the GPU setup.
  system.nixos.tags = [
    "NVIDIA"
    "AMDGPU"
  ];
  hardware.nvidia = {
    modesetting.enable = true;

    # Prefer the open NVIDIA driver.
    open = true;

    # Enable the nvidia-settings command.
    nvidiaSettings = true;

    # Offloading setup: use GPU when asked for by command, and not otherwise.
    prime = {
      sync.enable = true;

      # Specify how to find our GPUs.
      amdgpuBusId = "PCI:4:0:0";
      nvidiaBusId = "PCI:1:0:0";
    };

  };

  # Provide a way to disable the NVIDIA GPU entirely,
  # for points when traveling where we don't want to burn power.
  specialisation.lowpower.configuration = {
    system.nixos.tags = lib.mkForce [ "AMDGPU" ];

    # Disable the NVIDIA GPU.
    hardware.nvidiaOptimus.disable = true;

    # These don't actually do anything, but they make introspecting
    # the configuration a bit nicer.
    hardware.nvidia.modesetting.enable = lib.mkForce false;
    hardware.nvidia.prime.sync.enable = lib.mkForce false;
  };

  # Set up the asus-on-linux services for this machine.
  services.asusd = {
    enable = true;
    enableUserService = true;
  };

  # Enable fingerprint reader...
  services.fprintd = {
    enable = false;

    # ... and use a weird Goodix-ized fork of libfprintd.
    package = pkgs.fprintd.override {
      libfprint = pkgs.libfprint.overrideAttrs (prev: {

        # Add in the additional dependencies for the Goodix fork...
        buildInputs =
          prev.buildInputs
          ++ (with pkgs; [
            cmake
            openssl
          ]);

        # ... and retarget the package to the fork.
        src = pkgs.fetchFromGitHub {
          owner = "infinytum";
          repo = "libfprint";
          rev = "5e14af7f136265383ca27756455f00954eef5db1";
          hash = "sha256-MFhPsTF0oLUMJ9BIRZnSHj9VRwtHJxvWv0WT5zz7vDY=";
        };

        # Manually null out the installCheckPhase.
        installCheckPhase = "";

      });
    };
  };

  #
  # Hardware config.
  #

  boot.initrd.availableKernelModules = [
    "xhci_pci"
    "vmd"
    "nvme"
    "usbhid"
    "usb_storage"
    "sd_mod"
  ];
  boot.initrd.kernelModules = [ ];

  # Support virtualization, thunderbolt, and poking the APCI directly. >.>
  boot.kernelModules = [
    "thunderbolt"
    "acpi_call"
  ];
  boot.extraModulePackages = [ config.boot.kernelPackages.acpi_call ];

  fileSystems."/" = {
    device = "/dev/disk/by-uuid/bb880b80-992f-4e56-bb80-c5c4df0ddd72";
    fsType = "ext4";
  };

  fileSystems."/boot" = {
    device = "/dev/disk/by-uuid/5B37-C691";
    fsType = "vfat";
    options = [
      "fmask=0022"
      "dmask=0022"
    ];
  };

  swapDevices = [ { device = "/dev/disk/by-uuid/50f20263-9632-439d-b57d-b9ee8f13d62b"; } ];

  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
  # (the default) this is the recommended approach. When using systemd-networkd it's
  # still possible to use this option, but it's recommended to use it in conjunction
  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
  networking.useDHCP = lib.mkDefault true;
  # networking.interfaces.wlp0s20f3.useDHCP = lib.mkDefault true;

  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
}