add [endlevel] bonus=number

instead of bonus=yes/no you can also pass a number, so bonus=0.5 will
give you only half of the bonus gold.

data/lua/wml-tags.lua

@@ -1474,7 +1474,15 @@ function wml_actions.endlevel(cfg)
 	local there_is_a_human_defeat = false
 	local there_is_a_local_human_victory = false
 	local there_is_a_local_human_defeat = false
-
+	local bool_int = function(b)
+		if b == true then
+			return 0
+		elseif b == false then
+			return 1
+		else
+			return b
+		end
+	end
 	for k,v in ipairs(wesnoth.sides) do
 		local side_result = side_results[v.side] or {}
 		local victory_or_defeat = side_result.result or cfg.result or "victory"
@@ -1497,9 +1505,9 @@ function wml_actions.endlevel(cfg)
 			end
 		end
 		if side_result.bonus ~= nil then
-			v.carryover_bonus = side_result.bonus
+			v.carryover_bonus = bool_int(side_result.bonus)
 		elseif cfg.bonus ~= nil then
-			v.carryover_bonus = cfg.bonus
+			v.carryover_bonus = bool_int(cfg.bonus)
 		end
 		if side_result.carryover_add ~= nil then
 			v.carryover_add = side_result.carryover_add

src/game_initialization/playcampaign.cpp

@@ -65,7 +65,7 @@ void campaign_controller::report_victory(
 {
 	report << "<small>" << _("Remaining gold: ") << utils::half_signed_value(t.gold()) << "</small>";
 
-	if(t.carryover_bonus()) {
+	if(t.carryover_bonus() != 0) {
 		if (turns_left > -1) {
 			report << "\n\n<b>" << _("Turns finished early: ") << turns_left << "</b>\n"
 				   << "<small>" << _("Early finish bonus: ") << finishing_bonus_per_turn << _(" per turn") << "</small>\n"
@@ -169,7 +169,7 @@ void campaign_controller::show_carryover_message(playsingle_controller& playcont
 				continue;
 			}
 			int finishing_bonus_per_turn = map.villages().size() * t.village_gold() + t.base_income();
-			int finishing_bonus = t.carryover_bonus() ? finishing_bonus_per_turn * turns_left : 0;
+			int finishing_bonus = t.carryover_bonus() * finishing_bonus_per_turn * turns_left;
 			t.set_carryover_gold(div100rounded((t.gold() + finishing_bonus) * t.carryover_percentage()));
 			if(!t.is_local_human())
 			{

src/scripting/lua_team.cpp

@@ -74,7 +74,7 @@ static int impl_side_get(lua_State *L)
 	return_cstring_attrib("controller", t.controller().to_string().c_str());
 	return_string_attrib("defeat_condition", t.defeat_condition().to_string());
 	return_string_attrib("share_vision", t.share_vision().to_string());
-	return_bool_attrib("carryover_bonus", t.carryover_bonus());
+	return_float_attrib("carryover_bonus", t.carryover_bonus());
 	return_int_attrib("carryover_percentage", t.carryover_percentage());
 	return_bool_attrib("carryover_add", t.carryover_add());
 	return_bool_attrib("lost", t.lost());
@@ -121,11 +121,15 @@ static int impl_side_set(lua_State *L)
 	modify_string_attrib("controller", t.change_controller_by_wml(value));
 	modify_string_attrib("color", t.set_color(value));
 	modify_string_attrib("defeat_condition", t.set_defeat_condition_string(value));
-	modify_bool_attrib("carryover_bonus", t.set_carryover_bonus(value));
 	modify_int_attrib("carryover_percentage", t.set_carryover_percentage(value));
 	modify_bool_attrib("carryover_add", t.set_carryover_add(value));
 	modify_bool_attrib("lost", t.set_lost(value));
 
+	if (strcmp(m, "carryover_bonus") == 0) {
+		t.set_carryover_bonus(luaL_checknumber(L, 3));
+		return 0;
+	}
+
 	if (strcmp(m, "recruit") == 0) {
 		t.set_recruits(std::set<std::string>());
 		if (!lua_istable(L, 3)) return 0;

src/team.cpp

@@ -112,7 +112,7 @@ team::team_info::team_info() :
 	lost(false),
 	carryover_percentage(game_config::gold_carryover_percentage),
 	carryover_add(false),
-	carryover_bonus(false),
+	carryover_bonus(0),
 	carryover_gold(0)
 {
 }
@@ -145,7 +145,7 @@ void team::team_info::read(const config &cfg)
 	side = cfg["side"].to_int(1);
 	carryover_percentage = cfg["carryover_percentage"].to_int(game_config::gold_carryover_percentage);
 	carryover_add = cfg["carryover_add"].to_bool(false);
-	carryover_bonus = cfg["carryover_bonus"].to_bool(false);
+	carryover_bonus = cfg["carryover_bonus"].to_double(1);
 	carryover_gold = cfg["carryover_gold"].to_int(0);
 	variables = cfg.child_or_empty("variables");
 

src/team.hpp

@@ -162,7 +162,8 @@ class team : public savegame::savegame_config
 
 		int carryover_percentage;
 		bool carryover_add;
-		bool carryover_bonus;
+		// TODO: maybe make this integer percentage? I like the float version more but this might casue OOS error because of floating point rounding differences on different hardware.
+		double carryover_bonus;
 		int carryover_gold;
 		config variables;
 		void handle_legacy_share_vision(const config& cfg);
@@ -350,8 +351,8 @@ class team : public savegame::savegame_config
 	int carryover_percentage() const { return info_.carryover_percentage; }
 	void set_carryover_add(bool value) { info_.carryover_add = value; }
 	bool carryover_add() const { return info_.carryover_add; }
-	void set_carryover_bonus(bool value) { info_.carryover_bonus = value; }
-	bool carryover_bonus() const { return info_.carryover_bonus; }
+	void set_carryover_bonus(double value) { info_.carryover_bonus = value; }
+	double carryover_bonus() const { return info_.carryover_bonus; }
 	void set_carryover_gold(int value) { info_.carryover_gold = value; }
 	int carryover_gold() const { return info_.carryover_gold; }
 	config& variables() { return info_.variables; }