Disable child tool for some mobs

mods/rp_mobs/API.md

@@ -211,7 +211,8 @@ by manipulating the drowning fields (see the mob field reference).
 ### Breeding
 
 Breeding will make mobs mate and create offspring. To enable, call
-`rp_mobs.handle_breeding` in `on_step`.
+`rp_mobs.handle_breeding` in `on_step`. You also need to add the tag
+`"child_exists"` to the mob definition.
 
 In particular, to breed, two adult mobs of the same type need to be “horny” and close
 to each other. Then, a random mob of the pair gets pregnant and will soon
@@ -328,6 +329,8 @@ The field `_cmi_is_mob=true` will be set automatically for all mobs and can be u
       the player alone. Peaceful mobs may still turn hostile when provoked.
       Mobs that start hostile towards the player do not count as peaceful.
       If the setting `spawn_peaceful_only` is enabled, only mobs with this tag can spawn.
+    * `"child_exists"`: Mob has a functional child version. This tag is only
+      for informing other mobs; it does not have an effect in the `rp_mobs` code
   * Example: `tags = { animal = 1, peaceful = 1, exploder = 1 }`
       * A peaceful animal, plus a custom `"exploder"` tag.
 
@@ -697,6 +700,8 @@ Turns the mob into an adult.
 #### `rp_mobs.turn_into_child(mob)`
 
 Turns the mob into a child.
+IMPORTANT: You *must* check whether the mob has the `"child_exists"` tag before calling this.
+Don't call this function if the mob does not have this tag.
 
 #### `rp_mobs.advance_child_growth(mob, dtime)`
 

mods/rp_mobs/api.lua

@@ -182,10 +182,10 @@ end
 
 rp_mobs.mobdef_has_tag = function(mobname, tag_name)
 	local mobdef = rp_mobs.registered_mobs[mobname]
-	if not mobdef then
+	if not mobdef or not mobdef.entity_definition or not mobdef.entity_definition._tags then
 		return false
 	end
-	return mobdef._tags[tag_name] == 1
+	return mobdef.entity_definition._tags[tag_name] == 1
 end
 
 local flip_over_collisionbox = function(box, is_child, y_offset)

mods/rp_mobs_mobs/boar.lua

@@ -37,7 +37,7 @@ local task_queue_roam_settings = {
 --
 rp_mobs.register_mob("rp_mobs_mobs:boar", {
 	description = S("Boar"),
-	tags = { animal = 1, peaceful = 1 },
+	tags = { animal = 1, child_exists = 1, peaceful = 1 },
 	drops = {
 		{name="rp_mobs_mobs:pork_raw", chance=1, min=1, max=4},
 	},

mods/rp_mobs_mobs/sheep.lua

@@ -152,7 +152,7 @@ end
 
 rp_mobs.register_mob("rp_mobs_mobs:sheep", {
 	description = S("Sheep"),
-	tags = { animal = 1, peaceful = 1 },
+	tags = { animal = 1, child_exists = 1, peaceful = 1 },
 	drops = {
 		{name="rp_mobs_mobs:meat_raw", chance=1, min=2, max=4},
 	},

mods/rp_mobs_mobs/skunk.lua

@@ -33,7 +33,7 @@ local task_queue_roam_settings = {
 
 rp_mobs.register_mob("rp_mobs_mobs:skunk", {
 	description = S("Skunk"),
-	tags = { animal = 1, peaceful = 1 },
+	tags = { animal = 1, child_exists = 1, peaceful = 1 },
 	drops = {
 		{name="rp_mobs_mobs:meat_raw", chance=1, min=1, max=2},
 	},

mods/rp_supertools/init.lua

@@ -164,7 +164,7 @@ minetest.register_craftitem(
          end
          local obj = pointed_thing.ref
          local ent = obj:get_luaentity()
-         if ent and ent._cmi_is_mob and not ent._child then
+         if ent and ent._cmi_is_mob and not ent._child and rp_mobs.mobdef_has_tag(ent.name, "child_exists") then
             local pos = obj:get_pos()
             rp_mobs.turn_into_child(obj)
             if not minetest.is_creative_enabled(placer:get_player_name()) then