Mods in den Spieleordner reingeschoben. So richtig tief.

mods/leads/items.lua

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+--[[
+    Leads — Adds leads for transporting animals to Minetest.
+    Copyright © 2023, Silver Sandstone <@SilverSandstone@craftodon.social>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+]]
+
+
+--- Item definitions.
+-- @module items
+
+
+local S = leads.S;
+
+
+minetest.register_craftitem('leads:lead',
+{
+    description          = S'Lead';
+    inventory_image      = 'leads_lead_inv.png';
+    groups               = {leads_lead = 1};
+    on_use               = leads.on_lead_punch;
+    on_secondary_use     = leads.on_lead_use;
+    on_place             = leads.on_lead_use;
+    _leads_length        = leads.settings.lead_length;
+    _leads_texture       = leads.DEFAULT_LEAD_TEXTURE;
+    _doc_items_longdesc  = S'Leads can be used for moving and tethering animals. They can also be attached between two fences for decoration.';
+    _doc_items_usagehelp = S'Right-click on an animal or fence to attach a lead. Punch the lead to release it, or right-click on a fence to tether it.';
+});
+
+
+local rope = leads.util.first_available_item('farming:string', 'mcl_mobitems:string', 'rp_default:rope', 'hades_farming:cotton', 'nodes_nature:chalin') or 'group:string';
+local glue = leads.util.first_available_item('mesecons_materials:glue', 'mcl_mobitems:slimeball', 'mobs_mc:slimeball', 'rp_default:fiber')              or rope;
+minetest.register_craft(
+{
+    output = 'leads:lead';
+    recipe =
+    {
+        {rope, rope, ''},
+        {rope, glue, ''},
+        {'',   '',   rope},
+    };
+});