propagate the number of inputs of the subnetwork to the HDA and support publishing HDAs with spare parameters

client/ayon_houdini/plugins/create/create_hda.py

@@ -222,7 +222,9 @@ def create_instance_node(
                 name=type_name,
                 description=node_name,
                 hda_file_name="$HIP/{}.hda".format(node_name),
-                ignore_external_references=True
+                ignore_external_references=True,
+                min_num_inputs=0,
+                max_num_inputs=len(to_hda.inputs()) or 1,
             )
             hda_node.layoutChildren()
         elif self._check_existing(folder_path, node_name):

client/ayon_houdini/plugins/publish/extract_hda.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 import os
-from pprint import pformat
 import hou
 import pyblish.api
 from ayon_houdini.api import plugin
@@ -13,17 +12,33 @@ class ExtractHDA(plugin.HoudiniExtractorPlugin):
     families = ["hda"]
 
     def process(self, instance):
-        self.log.info(pformat(instance.data))
+
         hda_node = hou.node(instance.data.get("instance_node"))
         hda_def = hda_node.type().definition()
         hda_options = hda_def.options()
         hda_options.setSaveInitialParmsAndContents(True)
+        hda_options.setSaveSpareParms(True)
 
         next_version = instance.data["anatomyData"]["version"]
         self.log.info("setting version: {}".format(next_version))
         hda_def.setVersion(str(next_version))
         hda_def.setOptions(hda_options)
+
+        # Get `Extra` AYON parameters
+        parm_group = hda_node.parmTemplateGroup()
+        parm_folder = parm_group.findFolder("Extra") # This name is a hard coded name in AYON.
+        assert parm_folder, f"Extra parm folder does not exist: {hda_node.path()}"
+
+        # Remove `Extra` AYON parameters
+        parm_group.remove(parm_folder.name())   
+        hda_node.setParmTemplateGroup(parm_group)
+
+        # Save the HDA file
         hda_def.save(hda_def.libraryFilePath(), hda_node, hda_options)
+
+        # Add `Extra` AYON parameters back
+        parm_group.append(parm_folder)
+        hda_node.setParmTemplateGroup(parm_group)
 
         if "representations" not in instance.data:
             instance.data["representations"] = []