Make roles available to lua

src/LuaShipDef.cpp

@@ -276,6 +276,14 @@ void LuaShipDef::Register()
 		lua_setfield(l, -3, "equipSlotCapacity");
 		lua_pop(l, 1);
 
+		lua_newtable(l);
+		for (auto it = st.roles.cbegin(); it != st.roles.cend(); ++it) {
+			pi_lua_settable(l, it->first.c_str(), it->second);
+		}
+		pi_lua_readonly_table_proxy(l, -1);
+		lua_setfield(l, -3, "roles");
+		lua_pop(l, 1);
+
 		pi_lua_readonly_table_proxy(l, -1);
 		lua_setfield(l, -3, iter.first.c_str());
 		lua_pop(l, 1);

src/ShipType.cpp

@@ -103,6 +103,11 @@ ShipType::ShipType(const Id &_id, const std::string &path)
 		slots[slotname] = data["slots"].get(slotname, 0).asInt();
 	}
 
+	for( Json::Value::iterator role = data["roles"].begin(); role != data["roles"].end(); ++role ) {
+		const std::string rolename = role.key().asString();
+		roles[rolename] = data["roles"].get(rolename, 0).asBool();
+	}
+
 	for(int it=0;it<4;it++) thrusterUpgrades[it] = 1.0 + (double(it)/10.0);
 	for( Json::Value::iterator slot = data["thrust_upgrades"].begin() ; slot != data["thrust_upgrades"].end() ; ++slot ) {
 		const std::string slotname = slot.key().asString();

src/ShipType.h

@@ -52,6 +52,7 @@ struct ShipType {
 	float linThrust[THRUSTER_MAX];
 	float angThrust;
 	std::map<std::string, int> slots;
+	std::map<std::string, bool> roles;
 	double thrusterUpgrades[4];
 	int capacity; // tonnes
 	int hullMass;