fix grass dropes

overrides.lua

@@ -64,25 +64,46 @@ end
 --MAKE YEAST NATURALLY OCCURING
 -------------------------------
 
-for i = 1, 5 do
-	minetest.override_item("default:grass_"..i, {drop = {
-		max_items = 1,
-		items = {
-			{items = {'farming:seed_wheat'},rarity = 5},
-		{items = {'bbq:yeast'},rarity = 8},
-			{items = {'default:grass_1'}},
-		}
-	}})
+local function append_drops(itemstring, items)
+	local def = minetest.registered_items[itemstring]
+	local newdrop
+	if type(def.drop) == "table" then
+		newdrop = {max_items = def.drop.max_items, items = {}}
+		local olditems = def.drop.items
+		local savedpos = nil
+		for i, it in ipairs(olditems) do
+			if it.rarity == nil then
+				savedpos = i
+				break
+			end
+			table.insert(newdrop.items, it)
+		end
+		for _, it in ipairs(items) do
+			table.insert(newdrop.items, it)
+		end
+		if savedpos ~= nil then
+			for i = savedpos, #olditems do
+				table.insert(newdrop.items, olditems[i])
+			end
+		end
+	else
+		newdrop = {max_items = 1, items = table.copy(items)}
+		if type(def.drop) == "string" then
+			table.insert(newdrop.items, {items = {def.drop}})
+		end
+	end
+	minetest.override_item(itemstring, {drop = newdrop})
 end
 
-minetest.override_item("default:junglegrass", {drop = {
-	max_items = 1,
-	items = {
-		{items = {'farming:seed_cotton'},rarity = 8},
-		{items = {'bbq:yeast'},rarity = 8},
-		{items = {'default:junglegrass'}},
-	}
-}})
+for i = 1, 5 do
+	append_drops("default:grass_"..i, {
+		{items = {"bbq:yeast"}, rarity = 8},
+	})
+end
+
+append_drops("default:junglegrass", {
+	{items = {"bbq:yeast"}, rarity = 8},
+})
 
 -----------------------------------------------
 --MAKE VESSEL TYPE ITEMS WORK WITH VESSEL SHELF