Add some logging

init.lua

@@ -3,6 +3,28 @@ sneeker = {}
 sneeker.modname = core.get_current_modname()
 sneeker.modpath = core.get_modpath(sneeker.modname)
 
+local debugging = core.settings:get_bool("enable_debug_mods", false)
+sneeker.log = function(lvl, msg)
+	if lvl == "debug" and not debugging then return end
+
+	if msg == nil then
+		msg = lvl
+		lvl = nil
+	end
+
+	msg = "[" .. sneeker.modname .. "] " .. msg
+	if lvl == "debug" then
+		msg = "[DEBUG]" .. msg
+		lvl = nil;
+	end
+
+	if not lvl then
+		core.log(msg)
+	else
+		core.log(lvl, msg)
+	end
+end
+
 local scripts = {
 	"settings",
 	"tnt_function",

settingtypes.txt

@@ -1,4 +1,7 @@
 
+# Extra debugging messages.
+enable_debug_mods (Mod debugging) bool false
+
 # Sets possibility for spawn.
 #
 # Rate is the inverted value (e.g. 1/value).

spawn.lua

@@ -10,6 +10,12 @@ if core.global_exists("nether") then
 	table.insert(spawn_nodes, "nether:rack")
 end
 
+for _, node_name in ipairs(spawn_nodes) do
+	if not core.registered_nodes[node_name] then
+		sneeker.log("warning", "Invalid node for spawn: " .. node_name)
+	end
+end
+
 
 core.register_abm({
 	nodenames = spawn_nodes,
@@ -40,6 +46,12 @@ core.register_abm({
 			return
 		end
 
-		core.add_entity(pos, "sneeker:sneeker")
+		local spawned = core.add_entity(pos, "sneeker:sneeker")
+		if not spawned then
+			sneeker.log("warning", "Failed to spawn at: "
+				.. tostring(math.floor(pos.x))
+				.. "," .. tostring(math.floor(pos.y))
+				.. "," .. tostring(math.floor(pos.z)))
+		end
 	end
 })