Add min_minetest_version = 5.5 and error out on older versions

But provide fallback to run with default mods that don't have
set_inventory_action_loggers.

Author: j-r

init.lua

@@ -6,6 +6,23 @@ digtron.auto_controller_colorize = "#88000030"
 digtron.pusher_controller_colorize = "#00880030"
 digtron.soft_digger_colorize = "#88880030"
 
+if not vector.copy then
+	error("[digtron] Your Luanti/Minetest version is too old. Please update to 5.5.0 or newer.")
+end
+
+digtron.set_inventory_action_loggers = function(def, name)
+	default.set_inventory_action_loggers(def, name)
+	return def
+end
+
+if not default.set_inventory_action_loggers then
+	minetest.log("error", "[digtron] Your Minetest Game (default mod) version seems very old. Digtron may not work correctly. Please consider updating to a current version.")
+
+	digtron.set_inventory_action_loggers = function(def)
+		return def
+	end
+end
+
 -- A global dictionary is used here so that other substitutions can be added easily by other mods, if necessary
 digtron.builder_read_item_substitutions = {
 	["default:torch_ceiling"] = "default:torch",

mod.conf

@@ -7,3 +7,4 @@ optional_depends = pipeworks, doc, hopper, awards, catacomb, intllib, technic
 license = MIT, LGPL 2.1 or later
 forum = https://forum.minetest.net/viewtopic.php?t=16295
 version = 0.8
+min_minetest_version = 5.5

nodes/node_battery_holder.lua

@@ -115,6 +115,4 @@ local def = {
 	after_dig_node = (function() if minetest.get_modpath("pipeworks")then return pipeworks.after_dig end end)()
 }
 
-default.set_inventory_action_loggers(def, "digtron battery holder")
-
-minetest.register_node("digtron:battery_holder", def)
+minetest.register_node("digtron:battery_holder", digtron.set_inventory_action_loggers(def))

nodes/node_storage.lua

@@ -5,16 +5,6 @@ local S = digtron.S
 
 local pipeworks_path = minetest.get_modpath("pipeworks")
 
----Apply `default.set_inventory_action_loggers` onto the given `def` table
----@see default.set_inventory_action_loggers
----@param def table
----@param name string
----@return table def
-local function set_logger(def, name)
-	default.set_inventory_action_loggers(def, name)
-	return def
-end
-
 local inventory_formspec_string =
 	"size[8,9.3]" ..
 	default.gui_bg ..
@@ -34,7 +24,7 @@ end
 
 -- Storage buffer. Builder nodes draw from this inventory and digger nodes deposit into it.
 -- Note that inventories are digtron group 2.
-minetest.register_node("digtron:inventory", set_logger({
+minetest.register_node("digtron:inventory", digtron.set_inventory_action_loggers({
 	description = S("Digtron Inventory Storage"),
 	_doc_items_longdesc = digtron.doc.inventory_longdesc,
 	_doc_items_usagehelp = digtron.doc.inventory_usagehelp,
@@ -121,7 +111,7 @@ end
 
 -- Fuel storage. Controller node draws fuel from here.
 -- Note that fuel stores are digtron group 5.
-minetest.register_node("digtron:fuelstore", set_logger({
+minetest.register_node("digtron:fuelstore", digtron.set_inventory_action_loggers({
 	description = S("Digtron Fuel Storage"),
 	_doc_items_longdesc = digtron.doc.fuelstore_longdesc,
 	_doc_items_usagehelp = digtron.doc.fuelstore_usagehelp,
@@ -227,7 +217,7 @@ local combined_storage_formspec = function()
 end
 
 -- Combined storage. Group 6 has both an inventory and a fuel store
-minetest.register_node("digtron:combined_storage", set_logger({
+minetest.register_node("digtron:combined_storage", digtron.set_inventory_action_loggers({
 	description = S("Digtron Combined Storage"),
 	_doc_items_longdesc = digtron.doc.combined_storage_longdesc,
     _doc_items_usagehelp = digtron.doc.combined_storage_usagehelp,