blockgame/mods/bg_woodworking/recipe.lua

local modname = minetest.get_current_modname()

blockgame.crafting.register_pummel_recipe({
	name = modname .. ":chop_log",
	label = "chop log into plank",
	used = {"group:stoney"},
	target = {"bg_tree:log"},
	check = function (pos, used_node, target_node)
		for _, side in pairs(blockgame.vector.sides) do
			local output_pos = pos + side
			if minetest.get_node(output_pos).name ~= "air" then return false end
		end
		return true
	end,
	on_success = function (pos, used_node, target_node)
		minetest.remove_node(pos)
		for _, side in pairs(blockgame.vector.sides) do
			local output_pos = pos + side
			minetest.set_node(output_pos, {name = modname .. ":plank"})
		end
	end,
})