Make dependency on map mod optional

init.lua

@@ -741,29 +741,6 @@ minetest.register_globalstep(
 	end
 )
 
-minetest.override_item(
-	"map:mapping_kit",
-	{
-		on_place = function(itemstack, player, pointed_thing)
-			local pos = pointed_thing.under
-			if pos then
-				local map = maps.create_map_item(
-					pos,
-					{ draw_x = true }
-				)
-				return map
-			end
-		end,
-		on_secondary_use = function(itemstack, player, pointed_thing)
-			local pos = player:get_pos()
-			if pos then
-			   local map = maps.create_map_item(pos)
-				return map
-			end
-		end,
-	}
-)
-
 minetest.register_craftitem(
 	"maps:map",
 	{
@@ -772,3 +749,28 @@ minetest.register_craftitem(
 		groups = { not_in_creative_inventory = 1 },
 	}
 )
+
+if minetest.registered_items["map:mapping_kit"] then
+	minetest.override_item(
+		"map:mapping_kit",
+		{
+			on_place = function(itemstack, player, pointed_thing)
+				local pos = pointed_thing.under
+				if pos then
+					local map = maps.create_map_item(
+						pos,
+						{ draw_x = true }
+					)
+					return map
+				end
+			end,
+			on_secondary_use = function(itemstack, player, pointed_thing)
+				local pos = player:get_pos()
+				if pos then
+					local map = maps.create_map_item(pos)
+					return map
+				end
+			end,
+		}
+	)
+end

mod.conf

@@ -1,3 +1,4 @@
-depends = map, tga_encoder
+depends = tga_encoder
+optional_depends = map
 description = Shows maps in the player HUD
 name = maps