Make node references absolute. Accomodate different top directory name.

detector.lua

@@ -3,8 +3,8 @@ local mesecons_rules = mesecon.rules.flat
 function boost_cart:turnoff_detector_rail(pos)
 	local node = minetest.get_node(pos)
 	if minetest.get_item_group(node.name, "detector_rail") == 1 then
-		if node.name == "boost_cart:detectorrail_on" then --has not been dug
-			minetest.swap_node(pos, {name = "boost_cart:detectorrail", param2=node.param2})
+		if node.name == ":boost_cart:detectorrail_on" then --has not been dug
+			minetest.swap_node(pos, {name = ":boost_cart:detectorrail", param2=node.param2})
 		end
 		mesecon.receptor_off(pos, mesecons_rules)
 	end
@@ -16,14 +16,14 @@ function boost_cart:signal_detector_rail(pos)
 		return
 	end
 
-	if node.name == "boost_cart:detectorrail" then
-		minetest.swap_node(pos, {name = "boost_cart:detectorrail_on", param2=node.param2})
+	if node.name == ":boost_cart:detectorrail" then
+		minetest.swap_node(pos, {name = ":boost_cart:detectorrail_on", param2=node.param2})
 	end
 	mesecon.receptor_on(pos, mesecons_rules)
 	minetest.after(0.5, boost_cart.turnoff_detector_rail, boost_cart, pos)
 end
 
-boost_cart:register_rail("boost_cart:detectorrail", {
+boost_cart:register_rail(":boost_cart:detectorrail", {
 	description = "Detector rail",
 	tiles = {
 		"carts_rail_straight_dtc.png", "carts_rail_curved_dtc.png",
@@ -34,7 +34,7 @@ boost_cart:register_rail("boost_cart:detectorrail", {
 	mesecons = {receptor = {state = "off", rules = mesecons_rules}},
 })
 
-boost_cart:register_rail("boost_cart:detectorrail_on", {
+boost_cart:register_rail(":boost_cart:detectorrail_on", {
 	description = "Detector rail ON (you hacker you)",
 	tiles = {
 		"carts_rail_straight_dtc_on.png", "carts_rail_curved_dtc_on.png",
@@ -43,13 +43,13 @@ boost_cart:register_rail("boost_cart:detectorrail_on", {
 	groups = boost_cart:get_rail_groups({
 		detector_rail = 1, not_in_creative_inventory = 1
 	}),
-	drop = "boost_cart:detectorrail",
+	drop = ":boost_cart:detectorrail",
 
 	mesecons = {receptor = {state = "on", rules = mesecons_rules}},
 })
 
 minetest.register_craft({
-	output = "boost_cart:detectorrail 6",
+	output = ":boost_cart:detectorrail 6",
 	recipe = {
 		{"default:steel_ingot", "mesecons:wire_00000000_off", "default:steel_ingot"},
 		{"default:steel_ingot", "group:stick", "default:steel_ingot"},

init.lua

@@ -1,16 +1,14 @@
-
+modDirectory = "boostcart"
 boost_cart = {}
-boost_cart.modpath = minetest.get_modpath("boost_cart")
+boost_cart.modpath = minetest.get_modpath(modDirectory)
 
 -- Maximal speed of the cart in m/s
 boost_cart.speed_max = 10
 -- Set to -1 to disable punching the cart from inside
 boost_cart.punch_speed_max = 7
 
-
 if not boost_cart.modpath then
-	error("\nWrong mod directory name! Please change it to 'boost_cart'.\n" ..
-			"See also: http://dev.minetest.net/Installing_Mods")
+	error("\nWrong mod directory name! Please change it to '" ..modDirectory.. "'.\nSee also: http://dev.minetest.net/Installing_Mods")
 end
 
 -- Support for non-default games
@@ -24,8 +22,8 @@ dofile(boost_cart.modpath.."/rails.lua")
 if minetest.global_exists("mesecon") then
 	dofile(boost_cart.modpath.."/detector.lua")
 --else
---	minetest.register_alias("carts:powerrail", "boost_cart:detectorrail")
---	minetest.register_alias("carts:powerrail", "boost_cart:detectorrail_on")
+--	minetest.register_alias("carts:powerrail", ":boost_cart:detectorrail")
+--	minetest.register_alias("carts:powerrail", ":boost_cart:detectorrail_on")
 end
 
 boost_cart.mtg_compat = minetest.global_exists("carts") and carts.pathfinder

rails.lua

@@ -106,7 +106,7 @@ minetest.register_craft({
 	}
 })
 
-boost_cart:register_rail("boost_cart:startstoprail", {
+boost_cart:register_rail(":boost_cart:startstoprail", {
 	description = "Start-stop rail",
 	tiles = {
 		"carts_rail_straight_ss.png", "carts_rail_curved_ss.png",
@@ -132,6 +132,6 @@ boost_cart:register_rail("boost_cart:startstoprail", {
 
 minetest.register_craft({
 	type = "shapeless",
-	output = "boost_cart:startstoprail 2",
+	output = ":boost_cart:startstoprail 2",
 	recipe = {"carts:powerrail", "carts:brakerail"},
 })