vacuum compat, jumping with air compartment into ignore works

air.lua

@@ -0,0 +1,17 @@
+-- jumpdrive buffer air (for vacuum jumps)
+
+minetest.register_node("jumpdrive:air", {
+	description = "Jumpdrive buffer air",
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	drawtype = "glasslike",
+	tiles = {"jumpdrive_air.png"},
+	groups = {not_in_creative_inventory=0},
+	paramtype = "light",
+	sunlight_propagates = true,
+	on_timer = function(pos,elapsed)
+		minetest.set_node(pos, {name="air"})
+	end
+})

common.lua

@@ -1,4 +1,5 @@
 
+local has_vacuum_mod = minetest.get_modpath("vacuum")
 local has_travelnet_mod = minetest.get_modpath("travelnet")
 local has_technic_mod = minetest.get_modpath("technic")
 local has_elevator_mod = minetest.get_modpath("elevator")
@@ -235,6 +236,15 @@ jumpdrive.execute_jump = function(pos, player)
 			return true
 		end
 
+		if node.name == "air" and newNode.name == "ignore" and has_vacuum_mod then
+			-- fill air with buffer air
+			minetest.set_node(to, {name="jumpdrive:air"})
+			local timer = minetest.get_node_timer(to)
+			-- buffer air expires after 10 seconds
+			timer:start(10)
+			return true
+		end
+
 		local meta = minetest.get_meta(from):to_table() -- Get metadata of current node
 		minetest.set_node(from, {name="air"}) -- perf reason (faster)
 

init.lua

@@ -1,3 +1,4 @@
+local has_vacuum_mod = minetest.get_modpath("vacuum")
 
 jumpdrive = {
 	config = {
@@ -18,6 +19,10 @@ jumpdrive = {
 
 local MP = minetest.get_modpath("jumpdrive")
 
+if has_vacuum_mod then
+	dofile(MP.."/air.lua")
+end
+
 dofile(MP.."/marker.lua")
 dofile(MP.."/common.lua")
 dofile(MP.."/engine.lua")