add copy crafting recipie

init.lua

@@ -383,3 +383,42 @@ minetest.register_craft({
         {"default:copper_ingot", "default:copper_ingot", "default:copper_ingot"},
     }
 })
+
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "waypoint_compass:compass",
+	recipe = {"waypoint_compass:compass", "waypoint_compass:compass"}
+})
+
+local function waypoint_compass_copy_meta(itemstack, player, old_craft_grid, craft_inv)
+    if itemstack:get_name() ~= "waypoint_compass:compass" then
+        return
+    end
+
+    local original
+    local index
+    for i = 1, #old_craft_grid do
+        local meta = old_craft_grid[i]:get_meta()
+        if get_compass_meta_is_set(meta) then
+            if not original then
+                original = old_craft_grid[i]
+                index = i
+            else
+                return ""
+            end
+        end
+    end
+    if not original then
+        return ""
+    end
+    local copymeta = original:get_meta():to_table()
+    itemstack:get_meta():from_table(copymeta)
+    -- put the compass with metadata back in the craft grid
+    craft_inv:set_stack("craft", index, original)
+end
+
+
+minetest.register_on_craft(waypoint_compass_copy_meta)
+
+minetest.register_craft_predict(waypoint_compass_copy_meta)