allow for recipe tables instead of only item IDs

README.md

@@ -58,7 +58,7 @@ This registers a hammer with the name “My Cool Hammer” that has the ID `mymo
 
 If instead of `head` the value `texture` is provided then the automatic texture generation is disabled and the hammer will get the texture defined by the `texture` value. If both values are added then the `texture` value is given precedence.
 
-The hammer is crafted like the provided hammers with two sticks and two of the items provided for `craft`.
+The hammer is crafted like the provided hammers with two sticks and two of the items provided for `craft`. Alternative: When providing a [recipe table](https://dev.minetest.net/minetest.register_craft) instead of an item ID then the recipe table is used for registering the crafting recipe for the hammer (the `output` value gets automatically set by the API and can be omitted).
 
 `uses` defines how often the hammer can be used. The value also gets stored in the tool’s definition as `_uniham.uses` that can be used by a custom `on_use` function for example
 

system/register_hammer.lua

@@ -31,6 +31,10 @@ local use_hammer = uniham.use_hammer
 --   [ ][s][x]
 --   [s][ ][ ]
 --
+-- If for `craft` a table is provided then the mod tries to register the hammer
+-- with the given table as recipe table. The `output` value gets overwritten
+-- by the mod but all other values are taken as they are.
+--
 -- The function provided via `on_use` gets three parameters when called by the
 -- hammer’s on_use action: `itemstack`, `player`, and `pointed_thing`. All of
 -- those three parameters are defined by Minetest’s API. The function has to
@@ -46,10 +50,12 @@ local use_hammer = uniham.use_hammer
 -- @param short_id   Unprefixed ID for the new hammer
 -- @param definition Definition table as described
 -- @see <https://dev.minetest.net/on_use#on_use>
+-- @see <https://dev.minetest.net/minetest.register_craft>
 -- @return void
 uniham.register_hammer = function (short_id, definition)
     local on_use = definition.on_use or use_hammer
     local autotexture = '([combine:16x16:-1,1=+s)^((+h^+m)^[makealpha:0,0,0)'
+    local hammer_id = minetest.get_current_modname()..':'..short_id
     local texture = ''
 
     if definition.head and not definition.texture then
@@ -64,8 +70,7 @@ uniham.register_hammer = function (short_id, definition)
         texture = definition.texture
     end
 
-
-    minetest.register_tool('uniham:'..short_id, {
+    minetest.register_tool(hammer_id, {
         description = definition.name,
         inventory_image = texture,
         _uniham = { uses = definition.uses },
@@ -74,12 +79,17 @@ uniham.register_hammer = function (short_id, definition)
         end
     })
 
-    minetest.register_craft({
-        output = minetest.get_current_modname()..':'..short_id,
-        recipe = {
-            { '',            definition.craft,  ''               },
-            { '',            'default:stick',   definition.craft },
-            { 'default:stick', '',              ''               }
-        }
-    })
+    if type(definition.craft) == 'string' then
+        minetest.register_craft({
+            output = hammer_id,
+            recipe = {
+                { '',            definition.craft,  ''               },
+                { '',            'default:stick',   definition.craft },
+                { 'default:stick', '',              ''               }
+            }
+        })
+    elseif type(definition.craft) == 'table' then
+        definition.craft['output'] = hammer_id
+        minetest.register_craft(definition.craft)
+    end
 end