[Server] Add getModFolder() script function and Config environment

apps/openmw-mp/Script/LuaState.cpp

@@ -75,6 +75,9 @@ LuaState::LuaState()
     coreTable["PROTOCOL"] = TES3MP_PROTO_VERSION;
     coreTable["loadedMods"] = coreTable.create();
 
+    configEnv = sol::environment(*lua, sol::create, lua->globals());
+    lua->set("Config", configEnv); // plain global environment for mod configuration
+
     // errors in sol::functions catches only in debug build for better performance
 #ifdef SOL_SAFE_FUNCTIONS
     lua->set_function("ErrorHandler", [](sol::object error_msg) {
@@ -236,6 +239,10 @@ sol::environment LuaState::openScript(std::string homePath, std::string modname)
         return homePath + "/data/" + modname + '/';
     });
 
+    lua->set_function("getModFolder", [homePath, modname]() -> const string{
+        return homePath + "/mods/" + modname + '/';
+    });
+
     lua->script_file(homePath + "/mods/" + modname + "/main.lua", env);
 
     sol::table modinfo = env["ModInfo"];

apps/openmw-mp/Script/LuaState.hpp

@@ -40,6 +40,7 @@ private:
 private:
     std::shared_ptr<sol::state> lua;
     sol::environment dataEnv;
+    sol::environment configEnv;
     std::unique_ptr<CommandController> cmdCtrl;
     std::unique_ptr<EventController> eventCtrl;
     std::unique_ptr<TimerController> timerCtrl;