fire flamable when temp high

mods/fire/init.lua

@@ -190,3 +190,23 @@ minetest.register_abm({
 	end,
 })
 
+-- too hot
+if minetest.setting_getbool("weather") then
+minetest.register_abm({
+	nodenames = {"group:flammable"},
+	interval = 5,
+	chance = 5,
+	action = function(p0, node, _, _)
+		-- If there is water or stuff like that around flame, don't ignite
+		if minetest.get_heat(p0) < 500 then return end
+		if fire.flame_should_extinguish(p0) then
+			return
+		end
+		local p = fire.find_pos_for_flame_around(p0)
+		if p then
+			minetest.set_node(p, {name="fire:basic_flame"})
+			fire.on_flame_add_at(p)
+		end
+	end,
+})
+end