support separated AOVs in arnold render

client/ayon_houdini/plugins/publish/collect_arnold_rop.py

@@ -70,20 +70,31 @@ def process(self, instance):
         multipartExr = True
 
         num_aovs = rop.evalParm("ar_aovs")
-        # TODO: Check the following logic.
-        #       as it always assumes that all AOV are not merged.
+
         for index in range(1, num_aovs + 1):
-            # Skip disabled AOVs
-            if not rop.evalParm("ar_enable_aov{}".format(index)):
+
+            aov_enabled = rop.evalParm("ar_enable_aov{}".format(index)) 
+            aov_sep = rop.evalParm("ar_aov_separate{}".format(index))
+            aov_path = rop.evalParm("ar_aov_separate_file{}".format(index))
+
+            # Skip disabled AOVs or AOVs with no separate aov file path
+            if not all((aov_enabled, aov_path, aov_sep)):
                 continue
 
             if rop.evalParm("ar_aov_exr_enable_layer_name{}".format(index)):
                 label = rop.evalParm("ar_aov_exr_layer_name{}".format(index))
             else:
                 label = evalParmNoFrame(rop, "ar_aov_label{}".format(index))
 
-            aov_product = self.get_render_product_name(default_prefix,
-                                                       suffix=label)
+            # NOTE:
+            #  we don't collect the actual AOV path but rather assume 
+            #    the user has used the default beauty path (collected above)
+            #    with the AOV name before the extension.
+            #  Also, Note that Ayon Publishing does not require a specific file name,
+            #    as it will be renamed according to the naming conventions set in the publish template.
+            aov_product = self.get_render_product_name(
+                prefix=default_prefix, suffix=label
+            )
             render_products.append(aov_product)
             files_by_aov[label] = self.generate_expected_files(instance,
                                                                aov_product)