Message when trying to spawn forbidden hostile mob

mods/ENTITIES/mcl_mobs/api.lua

@@ -50,8 +50,8 @@ end
 
 -- Load settings
 local damage_enabled = minetest.settings:get_bool("enable_damage")
-local mobs_spawn = minetest.settings:get_bool("mobs_spawn") ~= false
-local peaceful_only = minetest.settings:get_bool("only_peaceful_mobs")
+local mobs_spawn = minetest.settings:get_bool("mobs_spawn", true) ~= false
+
 local disable_blood = minetest.settings:get_bool("mobs_disable_blood")
 local mobs_drop_items = minetest.settings:get_bool("mobs_drop_items") ~= false
 local mobs_griefing = minetest.settings:get_bool("mobs_griefing") ~= false
@@ -65,7 +65,7 @@ local max_per_block = tonumber(minetest.settings:get("max_objects_per_block") or
 local mobs_spawn_chance = tonumber(minetest.settings:get("mobs_spawn_chance") or 2.5)
 
 -- Peaceful mode message so players will know there are no monsters
-if peaceful_only then
+if minetest.settings:get_bool("only_peaceful_mobs", false) then
 	minetest.register_on_joinplayer(function(player)
 		minetest.chat_send_player(player:get_player_name(),
 			S("Peaceful mode active! No monsters will spawn."))
@@ -2756,7 +2756,7 @@ local mob_activate = function(self, staticdata, def, dtime)
 
 	-- remove monsters in peaceful mode
 	if self.type == "monster"
-	and peaceful_only then
+	and minetest.settings:get_bool("only_peaceful_mobs", false) then
 
 		self.object:remove()
 
@@ -3754,6 +3754,12 @@ function mobs:register_egg(mob, desc, background, addegg, no_creative)
 					return itemstack
 				end
 
+				if minetest.settings:get_bool("only_peaceful_mobs", false)
+						and minetest.registered_entities[mob].type == "monster" then
+					minetest.chat_send_player(name, S("Only peaceful mobs allowed!"))
+					return itemstack
+				end
+
 				pos.y = pos.y + 1
 
 				local mob = minetest.add_entity(pos, mob)

mods/ENTITIES/mcl_mobs/locale/mcl_mobs.de.tr

@@ -6,3 +6,4 @@ You need the “maphack” privilege to change the mob spawner.=Sie brauchen das
 Name Tag=Namensschild
 A name tag is an item to name a mob.=Ein Namensschild ist ein Gegenstand, um einen Mob zu benennen.
 Before you use the name tag, you need to set a name at an anvil. Then you can use the name tag to name a mob. This uses up the name tag.=Bevor Sie ein Namensschild benutzen können, müssen Sie ihn an einem Amboss benennen. Dann können können Sie das Namensschild benutztn, um einen Mob zu benennen. Das wird das Namensschild verbrauchen.
+Only peaceful mobs allowed!=Nur friedliche Mobs erlaubt!

mods/ENTITIES/mcl_mobs/locale/template.txt

@@ -6,3 +6,4 @@ You need the “maphack” privilege to change the mob spawner.=
 Name Tag=
 A name tag is an item to name a mob.=
 Before you use the name tag, you need to set a name at an anvil. Then you can use the name tag to name a mob. This uses up the name tag.=
+Only peaceful mobs allowed!=

mods/MISC/mcl_commands/init.lua

@@ -126,6 +126,21 @@ local function register_chatcommand_alias(alias, cmd)
 	minetest.register_chatcommand(alias, def)
 end
 
+-- Replace spawnentity cmd to disallow spawning of hostile mobs if disabled
+local orig_func = minetest.registered_chatcommands["spawnentity"].func
+local cmd = table.copy(minetest.registered_chatcommands["spawnentity"])
+cmd.func = function(name, param)
+	local ent = minetest.registered_entities[param]
+	if minetest.settings:get_bool("only_peaceful_mobs", false) and ent and ent._cmi_is_mob and ent.type == "monster" then
+		return false, S("Only peaceful mobs allowed!")
+	else
+		local bool, msg = orig_func(name, param)
+		return bool, msg
+	end
+end
+minetest.unregister_chatcommand("spawnentity")
+minetest.register_chatcommand("spawnentity", cmd)
+
 if minecraftaliases then
 	register_chatcommand_alias("?", "help")
 	register_chatcommand_alias("who", "list")
@@ -145,3 +160,4 @@ if minecraftaliases then
 		end,
 	})
 end
+

mods/MISC/mcl_commands/locale/mcl_commands.de.tr

@@ -20,3 +20,4 @@ List bans=Bannliste anzeigen
 Ban list: @1=Bannliste: @1
 Show who is logged on=Anzeigen, wer eingeloggt ist
 Displays the world seed=Den Seed der Welt anzeigen
+Only peaceful mobs allowed!=Nur friedliche Mobs erlaubt!

mods/MISC/mcl_commands/locale/template.txt

@@ -20,3 +20,4 @@ List bans=
 Ban list: @1=
 Show who is logged on=
 Displays the world seed=
+Only peaceful mobs allowed!=