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98 lines
2.8 KiB
Nix
98 lines
2.8 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.programs.gamemode;
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settingsFormat = pkgs.formats.ini { };
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configFile = settingsFormat.generate "gamemode.ini" cfg.settings;
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in
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{
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options = {
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programs.gamemode = {
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enable = mkEnableOption (lib.mdDoc "GameMode to optimise system performance on demand");
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enableRenice = mkEnableOption (lib.mdDoc "CAP_SYS_NICE on gamemoded to support lowering process niceness") // {
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default = true;
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};
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settings = mkOption {
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type = settingsFormat.type;
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default = {};
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description = lib.mdDoc ''
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System-wide configuration for GameMode (/etc/gamemode.ini).
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See gamemoded(8) man page for available settings.
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'';
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example = literalExpression ''
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{
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general = {
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renice = 10;
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};
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# Warning: GPU optimisations have the potential to damage hardware
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gpu = {
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apply_gpu_optimisations = "accept-responsibility";
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gpu_device = 0;
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amd_performance_level = "high";
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};
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custom = {
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start = "''${pkgs.libnotify}/bin/notify-send 'GameMode started'";
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end = "''${pkgs.libnotify}/bin/notify-send 'GameMode ended'";
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};
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}
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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environment = {
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systemPackages = [ pkgs.gamemode ];
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etc."gamemode.ini".source = configFile;
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};
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security = {
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polkit.enable = true;
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wrappers = mkIf cfg.enableRenice {
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gamemoded = {
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owner = "root";
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group = "root";
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source = "${pkgs.gamemode}/bin/gamemoded";
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capabilities = "cap_sys_nice+ep";
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};
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};
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};
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systemd = {
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packages = [ pkgs.gamemode ];
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user.services.gamemoded = {
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# The upstream service already defines this, but doesn't get applied.
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# See https://github.com/NixOS/nixpkgs/issues/81138
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wantedBy = [ "default.target" ];
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# Use pkexec from the security wrappers to allow users to
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# run libexec/cpugovctl & libexec/gpuclockctl as root with
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# the the actions defined in share/polkit-1/actions.
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#
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# This uses a link farm to make sure other wrapped executables
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# aren't included in PATH.
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environment.PATH = mkForce (pkgs.linkFarm "pkexec" [
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{
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name = "pkexec";
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path = "${config.security.wrapperDir}/pkexec";
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}
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]);
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serviceConfig.ExecStart = mkIf cfg.enableRenice [
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"" # Tell systemd to clear the existing ExecStart list, to prevent appending to it.
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"${config.security.wrapperDir}/gamemoded"
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];
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};
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};
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};
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meta = {
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maintainers = with maintainers; [ kira-bruneau ];
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};
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}
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