Minetest module: Remove _G index, add lazy loading

minetest.lua

@@ -1,14 +1,59 @@
-local _ENV = setmetatable({}, {__index = _G})
-local function load(filename)
-	assert(loadfile(modlib.mod.get_resource(modlib.modname, "minetest", filename .. ".lua")))(_ENV)
+local _ENV = {}
+
+local components = {}
+for _, value in pairs{
+	"luon",
+	"raycast",
+	"schematic",
+	"colorspec"
+} do
+	components[value] = value
 end
--- minetest/gametime.lua is forceloaded in init.lua
-load"misc"
-load"collisionboxes"
-load"liquid"
-load"raycast"
-load"wielditem_change"
-load"colorspec"
-load"schematic"
-load"luon"
+for filename, comps in pairs{
+	misc = {
+		"max_wear",
+		"override",
+		"register_globalstep",
+		"form_listeners",
+		"register_form_listener",
+		"texture_modifier_inventorycube",
+		"get_node_inventory_image",
+		"check_player_privs",
+		"decode_base64",
+		"objects_inside_radius",
+		"objects_inside_area",
+		"nodename_matcher"
+	},
+	liquid = {
+		"liquid_level_max",
+		"get_liquid_corner_levels",
+		"flowing_downwards",
+		"get_liquid_flow_direction"
+	},
+	wielditem_change = {
+		"players",
+		"registered_on_wielditem_changes",
+		"register_on_wielditem_change"
+	},
+	colorspec = {
+		"named_colors",
+		"colorspec_to_colorstring"
+	},
+	collisionboxes = {
+		"get_node_collisionboxes"
+	}
+} do
+	for _, component in pairs(comps) do
+		components[component] = filename
+	end
+end
+
+setmetatable(_ENV, {__index = function(_ENV, name)
+	local filename = components[name]
+	if filename then
+		assert(loadfile(modlib.mod.get_resource(modlib.modname, "minetest", filename .. ".lua")))(_ENV)
+		return rawget(_ENV, name)
+	end
+end})
+
 return _ENV