Add additional gunpowder recipe using quarry:gravel.

falling_nodes.lua

@@ -7,8 +7,9 @@
 --
 -- In addition, digging gravel now drops quarry:gravel, which doesn't drop flint.
 -- That way, player can't just keep redigging their gravel inventory to get more flints.
--- 2020-06-13
+-- 2020-06-24
 
+-- Only check for flint drop one time.
 minetest.override_item("default:gravel", {
 	groups = {crumbly = 3, falling_node = 1},
 	drop = {
@@ -20,6 +21,7 @@ minetest.override_item("default:gravel", {
 	}
 })
 
+-- Replacement gravel that doesn't drop flint.
 minetest.register_node("quarry:gravel", {
 	description = ("Gravel"),
 	tiles = {"quarry_gravel.png"},
@@ -27,6 +29,15 @@ minetest.register_node("quarry:gravel", {
 	sounds = default.node_sound_gravel_defaults(),
 })
 
+-- Add additional gunpowder recipe that uses quarry:gravel.
+if minetest.get_modpath("tnt") ~= nil then
+	minetest.register_craft({
+		output = "tnt:gunpowder 5",
+		type = "shapeless",
+		recipe = {"default:coal_lump", "quarry:gravel"}
+	})
+end
+
 -- Make dirt nodes also falling.
 
 minetest.override_item("default:dirt", {

mod.conf

@@ -1,3 +1,4 @@
 name = quarry
 description = Adds quarry mechanics to stone nodes.
 depends = default, bucket, stairs, stonebrick_dungeons
+optional_depends = tnt