-- Make gravel digging consistent with cobble.
-- However, this could go either way.
-- With the default crumbly = 3, both cobble and gravel are easy to dig
--   by hand, so shovels aren't really necessary.
-- Setting crumbly = 2 for both, makes switching to shovels advantageous,
--   at the cost of making stone even more difficult to work.
--
-- 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.
-- 2020-06-24

-- Only check for flint drop one time.
minetest.override_item("default:gravel", {
	groups = {crumbly = 3, falling_node = 1},
	drop = {
		max_items = 1,
		items = {
			{items = {"default:flint"}, rarity = 16},
			{items = {"quarry:gravel"}}
		}
	}
})

-- Replacement gravel that doesn't drop flint.
minetest.register_node("quarry:gravel", {
	description = ("Gravel"),
	tiles = {"quarry_gravel.png"},
	groups = {crumbly = 3, falling_node = 1},
	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", {
	groups = {crumbly = 3, soil = 1, falling_node = 1},
})
minetest.override_item("default:dirt_with_grass", {
	groups = {crumbly = 3, soil = 1, spreading_dirt_type = 1, falling_node = 1},
})
minetest.override_item("default:dirt_with_grass_footsteps", {
	groups = {crumbly = 3, soil = 1, not_in_creative_inventory = 1, falling_node = 1},
})
minetest.override_item("default:dirt_with_dry_grass", {
	groups = {crumbly = 3, soil = 1, falling_node = 1},
	})
minetest.override_item("default:dirt_with_snow", {
	groups = {crumbly = 3, soil = 1, spreading_dirt_type = 1, snowy = 1, falling_node = 1},
})
minetest.override_item("default:dirt_with_rainforest_litter", {
	groups = {crumbly = 3, soil = 1, spreading_dirt_type = 1, falling_node = 1},
})
minetest.override_item("default:dirt_with_coniferous_litter", {
	groups = {crumbly = 3, soil = 1, spreading_dirt_type = 1, falling_node = 1},
})
minetest.override_item("default:dry_dirt", {
	groups = {crumbly = 3, soil = 1, falling_node = 1},
})
minetest.override_item("default:dry_dirt_with_dry_grass", {
	groups = {crumbly = 3, soil = 1, falling_node = 1},
})
minetest.override_item("default:permafrost", {
	groups = {cracky = 3, falling_node = 1},
})
minetest.override_item("default:permafrost_with_stones", {
	groups = {cracky = 3, falling_node = 1},
})
minetest.override_item("default:permafrost_with_moss", {
	groups = {cracky = 3, falling_node = 1},
})
minetest.override_item("default:snowblock", {
	groups = {crumbly = 3, cools_lava = 1, snowy = 1, falling_node = 1},
})