pyrox.dev
1{
2 config,
3 lib,
4 pkgs,
5 ...
6}:
7let
8 cfg = config.programs.gamescope;
9
10 gamescope =
11 let
12 wrapperArgs =
13 lib.optional (cfg.args != [ ]) ''--add-flags "${builtins.toString cfg.args}"''
14 ++ builtins.attrValues (builtins.mapAttrs (var: val: "--set-default ${var} ${val}") cfg.env);
15 in
16 pkgs.runCommand "gamescope" { nativeBuildInputs = [ pkgs.makeBinaryWrapper ]; } ''
17 mkdir -p $out/bin
18 makeWrapper ${cfg.package}/bin/gamescope $out/bin/gamescope --inherit-argv0 \
19 ${builtins.toString wrapperArgs}
20 ln -s ${cfg.package}/bin/gamescopectl $out/bin/gamescopectl
21 '';
22in
23{
24 options.programs.gamescope = {
25 enable = lib.mkEnableOption "gamescope, the SteamOS session compositing window manager";
26
27 package = lib.mkPackageOption pkgs "gamescope" { };
28
29 capSysNice = lib.mkOption {
30 type = lib.types.bool;
31 default = false;
32 description = ''
33 Add cap_sys_nice capability to the GameScope
34 binary so that it may renice itself.
35 '';
36 };
37
38 args = lib.mkOption {
39 type = lib.types.listOf lib.types.str;
40 default = [ ];
41 example = [
42 "--rt"
43 "--prefer-vk-device 8086:9bc4"
44 ];
45 description = ''
46 Arguments passed to GameScope on startup.
47 '';
48 };
49
50 env = lib.mkOption {
51 type = lib.types.attrsOf lib.types.str;
52 default = { };
53 example = lib.literalExpression ''
54 # for Prime render offload on Nvidia laptops.
55 # Also requires `hardware.nvidia.prime.offload.enable`.
56 {
57 __NV_PRIME_RENDER_OFFLOAD = "1";
58 __VK_LAYER_NV_optimus = "NVIDIA_only";
59 __GLX_VENDOR_LIBRARY_NAME = "nvidia";
60 }
61 '';
62 description = ''
63 Default environment variables available to the GameScope process, overridable at runtime.
64 '';
65 };
66 };
67
68 config = lib.mkIf cfg.enable {
69 security.wrappers = lib.mkIf cfg.capSysNice {
70 gamescope = {
71 owner = "root";
72 group = "root";
73 source = "${gamescope}/bin/gamescope";
74 capabilities = "cap_sys_nice+pie";
75 };
76 };
77
78 environment.systemPackages = lib.mkIf (!cfg.capSysNice) [ gamescope ];
79 };
80
81 meta.maintainers = with lib.maintainers; [ ];
82}