some scx shenanigans

modules/nixos/services/scx/default.nix

@@ -0,0 +1,42 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib) mkIf mkEnableOption mkOption types;
+  cfg = config.nixos.services.scx;
+in {
+  options = {
+    nixos.services.scx = {
+      enable = mkEnableOption "Enables scx scheduler";
+      scheduler = mkOption {
+        type = types.enum ["scx_lavd" "scx_rusty" "scx_bpfland"];
+        description = "Selects the scheduler for scx";
+        default = "scx_lavd";
+      };
+      flags = mkOption {
+        type = types.str;
+        description = "Custom flags to be passed to scx scheduler";
+        default = "";
+      };
+    };
+  };
+  config = mkIf cfg.enable {
+    systemd.services.scx = {
+      enable = true;
+      wantedBy = ["graphical.target"];
+      unitConfig = {
+        Description = "Start scx_scheduler";
+        ConditionPathIsDirectory = "/sys/kernel/sched_ext";
+        StartLimitIntervalSec = 30;
+        StartLimitBurst = 2;
+      };
+      serviceConfig = {
+        Type = "simple";
+        Restart = "on-failure";
+        StandardError = "journal";
+        ExecStart = "/bin/sh -c 'exec /run/current-system/sw/bin/${cfg.scheduler} ${cfg.flags} '";
+      };
+    };
+  };
+}