Add gurobi token server service

Not yet tested, I don't have a license yet

Signed-off-by: Shea Levy <shea@shealevy.com>

nixos/modules/module-list.nix

@@ -35,6 +35,7 @@
   ./misc/assertions.nix
   ./misc/check-config.nix
   ./misc/crashdump.nix
+  ./misc/gurobi.nix
   ./misc/ids.nix
   ./misc/lib.nix
   ./misc/locate.nix

nixos/modules/services/misc/gurobi.nix

@@ -0,0 +1,41 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+  cfg = config.services.gurobi.tokenServer;
+in {
+  options = {
+    services.gurobi.tokenServer = {
+      enable = mkOption {
+        default = false;
+
+        description = "Whether to enable the Gurobi token server";
+
+        type = types.bool;
+      };
+
+      license = mkOption {
+        description = "Path to the Gurobi license file";
+
+        type = types.path;
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.gurobi-token-server = {
+      description = "Gurobi token server";
+
+      wantedBy = [ "multi-user.target" ];
+
+      environment.GRB_LICENSE_FILE = cfg.license;
+
+      serviceConfig = {
+        ExecStart = "${pkgs.gurobi}/bin/grb_ts";
+
+        Type = "forking";
+      };
+    };
+  };
+}