nixos/hosts/architect/sunshine.nix

{ config, pkgs, ... }:

let
  user = "sunshine";
  resolutionScript = pkgs.writeTextFile {
    name = "sunshine-resolution-script";
    text = ''
      #!${pkgs.bash}/bin/bash
      
      width=''${1:-1280}
      height=''${2:-720}
      refresh_rate=''${3:-120}

      # Get the modeline info from the 2nd row in the cvt output
      modeline=$(${pkgs.xorg.libxcvt}/bin/cvt ''${width} ''${height} ''${refresh_rate} | ${pkgs.gawk}/bin/gawk 'FNR == 2')
      xrandr_mode_str=''${modeline//Modeline \"*\" /}
      mode_alias="''${width}x''${height}"

      echo "xrandr setting new mode ''${mode_alias} ''${xrandr_mode_str}" 
      ${pkgs.xorg.xrandr}/bin/xrandr --rmmode ''${mode_alias} || echo error
      ${pkgs.xorg.xrandr}/bin/xrandr --newmode ''${mode_alias} ''${xrandr_mode_str} || echo error 
      ${pkgs.xorg.xrandr}/bin/xrandr --addmode DP-0 ''${mode_alias} || echo error

      # Apply new xrandr mode
      ${pkgs.xorg.xrandr}/bin/xrandr --output DP-0 --primary --mode ''${mode_alias} --pos 0x0 --rotate normal || echo error

      ${config.boot.kernelPackages.nvidia_x11.settings}/bin/nvidia-settings -a 'SyncToVBlank=0' || echo error
      ${config.boot.kernelPackages.nvidia_x11.bin}/bin/nvidia-smi --persistence-mode=ENABLED || echo error
    '';
    executable = true;
    destination = "/bin/resolution.sh";
  };
  sunshinePkg = (pkgs.localPkgs.sunshine.override { cudaSupport = true; cudaPackages = pkgs.cudaPackages_12_4; boost = pkgs.boost186; });
in
{
  boot.kernelModules = [ "uinput" ];

  environment.systemPackages = [ pkgs.unstablePkgs.gamemode ];

  hardware = {
    pulseaudio.enable = false;

    nvidia = {
      modesetting.enable = true;
      powerManagement.enable = false;
      powerManagement.finegrained = false;
      open = false;
      nvidiaSettings = true;
    };
  };
  systemd.services.NetworkManager-wait-online.enable = pkgs.lib.mkForce false;
  programs.steam = {
    enable = true;
    gamescopeSession.enable = true;
  };

  security = {
    polkit.extraConfig = ''
      polkit.addRule(function(action, subject) {
          if (action.id == "org.freedesktop.login1.suspend" ||
              action.id == "org.freedesktop.login1.suspend-multiple-sessions" ||
              action.id == "org.freedesktop.login1.hibernate" ||
              action.id == "org.freedesktop.login1.hibernate-multiple-sessions")
          {
              return polkit.Result.NO;
          }
      });
    '';
    rtkit.enable = true;
  };

  systemd.user.services.sunshine = {
    serviceConfig = {
      Restart = pkgs.lib.mkForce "always";
    };
  };

  services = {
    sunshine = {
      enable = true;
      autoStart = true;
      package = sunshinePkg;
      settings = {
        sunshine_name = "The Architect";
        capture = "nvfbc";
        encoder = "nvenc";
        wan_encryption_mode = 0;
        lan_encryption_mode = 0;
        origin_web_ui_allowed = "lan";
        min_threads = 12;
        log_path = "sunshine.log";
      };
      applications = {
        env = {
          VDPAU_DRIVER = "nvidia";
          LIBVA_DRIVER_NAME = "nvidia";
          NVD_BACKEND = "direct";
          __GL_SYNC_TO_VBLANK = "0";
          __GL_VRR_ALLOWED = "0";
          DXVK_ASYNC = "1";
        };
        apps = [
          {
            name = "Steam";
            cmd = ''${pkgs.bash}/bin/bash -c "${pkgs.gamescope}/bin/gamescope --immediate-flips --rt -C 3000 -f -e -W ''${SUNSHINE_CLIENT_WIDTH} -H ''${SUNSHINE_CLIENT_HEIGHT} -r ''${SUNSHINE_CLIENT_FPS} -- ${pkgs.steam}/bin/steam -pipewire"'';
            prep-cmd = [
              {
                do = ''${pkgs.bash}/bin/bash -c "${resolutionScript}/bin/resolution.sh ''${SUNSHINE_CLIENT_WIDTH} ''${SUNSHINE_CLIENT_HEIGHT}" ''${SUNSHINE_CLIENT_FPS}"'';
                undo = ''${pkgs.bash}/bin/bash -c "${pkgs.procps}/bin/pkill gamescope; ${pkgs.procps}/bin/pkill sunshine"'';
              }
            ];
          }
        ];
      };
    };

    xserver = {
      enable = true;
      videoDrivers = [ "nvidia" ];
      desktopManager.gnome.enable = true;
      displayManager = {
        gdm = {
          enable = true;
          autoSuspend = false;
          autoLogin = {
            inherit user;
            enable = true;
          };
        };
        defaultSession = "gnome-xorg";
      };

      monitorSection = ''
        HorizSync       5.0 - 1000.0
        VertRefresh     5.0 - 1000.0
        Option         "DPMS"
      '';

      deviceSection = ''
        VendorName  "NVIDIA Corporation"
        Option      "CustomEDID" "DFP-1:/etc/X11/120edid.bin"
        Option "ConnectedMonitor" "DFP-1"
      '';

      screenSection = ''
        Monitor         "Configured Monitor"
        DefaultDepth    24

        Option "ModeValidation" "NoVertRefreshCheck, NoHorizSyncCheck, NoMaxSizeCheck, NoMaxPClkCheck, AllowNonEdidModes, NoEdidMaxPClkCheck"
        Option "UseEdidfreqs" "False"
        Option "TripleBuffer" "False"

        SubSection     "Display"
            Depth       24
        EndSubSection
      '';
    };
  };

  systemd.targets = {
    sleep.enable = false;
    suspend.enable = false;
    hibernate.enable = false;
    hybrid-sleep.enable = false;
  };

  users = {
    users.${user} = {
      isNormalUser = true;
      home = "/home/${user}";
      description = "Sunshine Server";
      extraGroups = [ "wheel" "networkmanager" "input" "video" "sound" ];
      openssh.authorizedKeys.keys = [ "ssh-rsa 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 giulio@giulio-X230" ];
    };

    groups.media.members = [ user ];
  };
}