Add and enable Satisfactory dedicated server

Add steamcmd to allowed unfree packages

system/Legion.nix

@@ -7,10 +7,9 @@
     ./services/home-assistant.nix
     ./services/minecraft.nix
     ./services/nix-serve.nix
-    # ./services/radicale.nix
+    ./services/satisfactory/default.nix
     ./services/sshd.nix
     ./services/syncthing.nix
-    # ./services/znc.nix
   ];
   boot.loader = {
     systemd-boot.enable = true;

system/default.nix

@@ -59,6 +59,7 @@
         "steam"
         "steam-original"
         "steam-run"
+        "steamcmd"
       ];
     overlays = [ (final: prev: { inherit (inputs.plasma-manager.packages.${prev.system}) rc2nix; }) ];
   };

system/services/satisfactory/default.nix

@@ -0,0 +1,9 @@
+{ ... }:
+{
+  imports = [ ./module.nix ];
+  services.satisfactory-server = {
+    enable = true;
+    openFirewall = true;
+    launchOptions = "-multihome=0.0.0.0";
+  };
+}

system/services/satisfactory/module.nix

@@ -0,0 +1,87 @@
+# From: https://gitlab.kuca.cz/tom-kuca/nix-config/-/blob/a11e73470c4f9a151afe67c7fa3a960b838d0d98/modules/nixos/satisfactory.nix
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.services.satisfactory-server;
+in
+{
+  options.services.satisfactory-server = {
+    enable = lib.mkEnableOption "Satisfactory Dedicated Server";
+
+    steamcmdPackage = lib.mkOption {
+      type = lib.types.package;
+      default = pkgs.steamcmd;
+      defaultText = "pkgs.steamcmd";
+      description = ''
+        The package implementing SteamCMD
+      '';
+    };
+
+    dataDir = lib.mkOption {
+      type = lib.types.path;
+      description = "Directory to store game server";
+      default = "/var/lib/satisfactory";
+    };
+
+    launchOptions = lib.mkOption {
+      type = lib.types.str;
+      description = "Launch options to use.";
+      default = "";
+    };
+
+    openFirewall = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = ''
+        Whether to open ports in the firewall for the server
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+
+    systemd.services.satisfactory-server =
+      let
+        steamcmd = "${cfg.steamcmdPackage}/bin/steamcmd";
+        steam-run = "${pkgs.steam-run}/bin/steam-run";
+      in
+      {
+        description = "Satisfactory Dedicated Server";
+        wantedBy = [ "multi-user.target" ];
+        after = [ "network.target" ];
+
+        serviceConfig = {
+          TimeoutSec = "15min";
+          ExecStart = "${steam-run} ${cfg.dataDir}/FactoryServer.sh ${cfg.launchOptions}";
+          Restart = "always";
+          User = "satisfactory";
+          WorkingDirectory = cfg.dataDir;
+        };
+
+        preStart = ''
+          ${steamcmd} +force_install_dir "${cfg.dataDir}" +login anonymous +app_update 1690800 validate +quit
+        '';
+      };
+
+    users.users.satisfactory = {
+      description = "Satisfactory server service user";
+      home = cfg.dataDir;
+      createHome = true;
+      isSystemUser = true;
+      group = "satisfactory";
+    };
+    users.groups.satisfactory = { };
+
+    networking.firewall = lib.mkIf cfg.openFirewall {
+      allowedUDPPorts = [
+        15777
+        7777
+        15000
+      ];
+    };
+  };
+}