From 03f71af7562445b2ba6538f167375a96f0c6fe6c Mon Sep 17 00:00:00 2001
From: Caroline Larimore <caroline@larimo.re>
Date: Tue, 18 Nov 2025 17:40:18 -0800
Subject: satisfactory: basic satisfactory server

---
 flake.nix                                       |   2 +
 modules/nixos/services/satisfactory/default.nix | 101 ++++++++++++++++++++++++
 systems/x86_64-linux/copenhagen/default.nix     |   4 +
 3 files changed, 107 insertions(+)
 create mode 100644 modules/nixos/services/satisfactory/default.nix

diff --git a/flake.nix b/flake.nix
index 062d047..54033ab 100644
--- a/flake.nix
+++ b/flake.nix
@@ -54,6 +54,8 @@
       "discord"
       "obsidian"
       "minecraft-server"
+      "steamcmd"
+      "steam-unwrapped"
     ];
 
     channels-config.permittedInsecurePackages = [
diff --git a/modules/nixos/services/satisfactory/default.nix b/modules/nixos/services/satisfactory/default.nix
new file mode 100644
index 0000000..32e25d5
--- /dev/null
+++ b/modules/nixos/services/satisfactory/default.nix
@@ -0,0 +1,101 @@
+# based on https://github.com/matejc/helper_scripts/blob/master/nixes/satisfactory.nix
+#TODO: separate servers into modules
+{ options, config, lib, pkgs, namespace, ... }:
+
+with lib; with lib.${namespace}; let
+  cfg = config.${namespace}.services.satisfactory;
+in {
+  options.${namespace}.services.satisfactory = {
+    enable = lib.mkEnableOption "Enable Satisfactory Dedicated Server";
+
+    port = mkOption {
+      type = types.port;
+      default = 7777;
+      description = "server port";
+    };
+
+    dir = lib.mkOption {
+      type = lib.types.path;
+      default = "/srv/satisfactory"; #TODO: create subdirs for invidividual servers
+      description = "server dir";
+    };
+
+    channel = lib.mkOption {
+      type = lib.types.enum [ "public" "experimental" ];
+      default = "public";
+      description = "release channel";
+    };
+
+    start = mkOption {
+      type = types.bool;
+      default = true;
+      description = "autostart";
+    };
+
+    extraSteamCmdArgs = lib.mkOption {
+      type = lib.types.str;
+      default = "";
+    };
+  };
+  
+  config = lib.mkIf cfg.enable {
+    users.users.satisfactory = {
+      group = "satisfactory";
+      home = cfg.dir;
+      createHome = true;
+      isSystemUser = true;
+    };
+    users.groups.satisfactory = {};
+
+    #TODO: why tf does steam work but this doesnt??
+    # nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
+    #   "steamcmd"
+    #   "steam-unwrapped"
+    # ];
+
+    networking = {
+      firewall = {
+        allowedTCPPorts = [ cfg.port 8888 ];
+        allowedUDPPorts = [ cfg.port ];
+      };
+    };
+
+    systemd.services.satisfactory = {
+      wantedBy = mkIf cfg.start [ "multi-user.target" ];
+
+      preStart = ''
+        ${pkgs.steamcmd}/bin/steamcmd \
+          +force_install_dir ${cfg.dir}/SatisfactoryDedicatedServer \
+          +login anonymous \
+          +app_update 1690800 \
+          -beta ${cfg.channel} \
+          ${cfg.extraSteamCmdArgs} \
+          validate \
+          +quit
+
+        ${pkgs.patchelf}/bin/patchelf --set-interpreter ${pkgs.glibc}/lib/ld-linux-x86-64.so.2 ${cfg.dir}/SatisfactoryDedicatedServer/Engine/Binaries/Linux/FactoryServer-Linux-Shipping
+        ln -sfv ${cfg.dir}/.steam/steam/linux64 ${cfg.dir}/.steam/sdk64
+
+        mkdir -p ${cfg.dir}/SatisfactoryDedicatedServer/FactoryGame/Saved/Config/LinuxServer
+      '';
+        # ${pkgs.crudini}/bin/crudini --set ${cfg.dir}/SatisfactoryDedicatedServer/FactoryGame/Saved/Config/LinuxServer/Game.ini '/Script/Engine.GameSession' MaxPlayers ${toString cfg.maxPlayers}
+        # ${pkgs.crudini}/bin/crudini --set ${cfg.dir}/SatisfactoryDedicatedServer/FactoryGame/Saved/Config/LinuxServer/ServerSettings.ini '/Script/FactoryGame.FGServerSubsystem' mAutoPause ${if cfg.autoPause then "True" else "False"}
+        # ${pkgs.crudini}/bin/crudini --set ${cfg.dir}/SatisfactoryDedicatedServer/FactoryGame/Saved/Config/LinuxServer/ServerSettings.ini '/Script/FactoryGame.FGServerSubsystem' mAutoSaveOnDisconnect ${if cfg.autoSaveOnDisconnect then "True" else "False"}
+
+      script = ''
+        exec ${cfg.dir}/SatisfactoryDedicatedServer/FactoryServer.sh -Port ${toString cfg.port}
+      '';
+
+      serviceConfig = {
+        Restart = "always";
+        User = "satisfactory";
+        Group = "satisfactory";
+        WorkingDirectory = cfg.dir;
+      };
+
+      environment = {
+        LD_LIBRARY_PATH="SatisfactoryDedicatedServer/linux64:SatisfactoryDedicatedServer/Engine/Binaries/Linux:SatisfactoryDedicatedServer/Engine/Binaries/ThirdParty/PhysX3/Linux/x86_64-unknown-linux-gnu";
+      };
+    };
+  };
+}
diff --git a/systems/x86_64-linux/copenhagen/default.nix b/systems/x86_64-linux/copenhagen/default.nix
index 7b342a1..fffc729 100644
--- a/systems/x86_64-linux/copenhagen/default.nix
+++ b/systems/x86_64-linux/copenhagen/default.nix
@@ -48,6 +48,10 @@ with lib; with lib.${namespace}; {
           port = 25569;
         };
       };
+
+      satisfactory = {
+        enable = true;
+      };
     };
   };
 
-- 
cgit v1.2.3