Converted __init__ module initialisation to new pattern

Thanks to Dr. Sybren for the BCON25 presentation that tipped me off to the existence of `register_classes_factory`.

io_scene_psk_psa/__init__.py

@@ -1,6 +1,41 @@
 from bpy.app.handlers import persistent
 
-if 'bpy' in locals():
+from .shared import data as shared_data, types as shared_types, helpers as shared_helpers
+from .shared import dfs as shared_dfs, ui as shared_ui
+from .psk import (
+    builder as psk_builder,
+    data as psk_data,
+    importer as psk_importer,
+    properties as psk_properties,
+    writer as psk_writer,
+)
+from .psk import reader as psk_reader, ui as psk_ui
+from .psk.export import (
+    operators as psk_export_operators,
+    properties as psk_export_properties,
+    ui as psk_export_ui,
+)
+from .psk.import_ import operators as psk_import_operators
+
+from .psa import (
+    config as psa_config,
+    data as psa_data,
+    writer as psa_writer,
+    reader as psa_reader,
+    builder as psa_builder,
+    importer as psa_importer,
+)
+from .psa.export import (
+    properties as psa_export_properties,
+    ui as psa_export_ui,
+    operators as psa_export_operators,
+)
+from .psa.import_ import operators as psa_import_operators
+from .psa.import_ import ui as psa_import_ui, properties as psa_import_properties
+
+_needs_reload = 'bpy' in locals()
+
+if _needs_reload:
     import importlib
 
     importlib.reload(shared_data)
@@ -33,58 +68,10 @@ if 'bpy' in locals():
     importlib.reload(psa_import_properties)
     importlib.reload(psa_import_operators)
     importlib.reload(psa_import_ui)
-else:
-    from .shared import data as shared_data, types as shared_types, helpers as shared_helpers
-    from .shared import dfs as shared_dfs, ui as shared_ui
-    from .psk import (
-        builder as psk_builder,
-        data as psk_data,
-        importer as psk_importer,
-        properties as psk_properties,
-        writer as psk_writer,
-    )
-    from .psk import reader as psk_reader, ui as psk_ui
-    from .psk.export import (
-        operators as psk_export_operators,
-        properties as psk_export_properties,
-        ui as psk_export_ui,
-    )
-    from .psk.import_ import operators as psk_import_operators
-
-    from .psa import (
-        config as psa_config,
-        data as psa_data,
-        writer as psa_writer,
-        reader as psa_reader,
-        builder as psa_builder,
-        importer as psa_importer,
-    )
-    from .psa.export import (
-        properties as psa_export_properties,
-        ui as psa_export_ui,
-        operators as psa_export_operators,
-    )
-    from .psa.import_ import operators as psa_import_operators
-    from .psa.import_ import ui as psa_import_ui, properties as psa_import_properties
 
 import bpy
 from bpy.props import PointerProperty
 
-classes = shared_types.classes + \
-          shared_ui.classes + \
-          psk_properties.classes + \
-          psk_ui.classes + \
-          psk_import_operators.classes + \
-          psk_export_properties.classes + \
-          psk_export_operators.classes + \
-          psk_export_ui.classes + \
-          psa_export_properties.classes + \
-          psa_export_operators.classes + \
-          psa_export_ui.classes + \
-          psa_import_properties.classes + \
-          psa_import_operators.classes + \
-          psa_import_ui.classes
-
 
 def psk_export_menu_func(self, context):
     self.layout.operator(psk_export_operators.PSK_OT_export.bl_idname, text='Unreal PSK (.psk)')
@@ -102,9 +89,26 @@ def psa_import_menu_func(self, context):
     self.layout.operator(psa_import_operators.PSA_OT_import.bl_idname, text='Unreal PSA (.psa)')
 
 
+_modules = (
+    shared_types,
+    shared_ui,
+    psk_properties,
+    psk_ui,
+    psk_import_operators,
+    psk_export_properties,
+    psk_export_operators,
+    psk_export_ui,
+    psa_export_properties,
+    psa_export_operators,
+    psa_export_ui,
+    psa_import_properties,
+    psa_import_operators,
+    psa_import_ui
+)
+
 def register():
-    for cls in classes:
-        bpy.utils.register_class(cls)
+    for module in _modules:
+        module.register()
     bpy.types.TOPBAR_MT_file_export.append(psk_export_menu_func)
     bpy.types.TOPBAR_MT_file_import.append(psk_import_menu_func)
     bpy.types.TOPBAR_MT_file_export.append(psa_export_menu_func)
@@ -128,8 +132,8 @@ def unregister():
     bpy.types.TOPBAR_MT_file_import.remove(psk_import_menu_func)
     bpy.types.TOPBAR_MT_file_export.remove(psa_export_menu_func)
     bpy.types.TOPBAR_MT_file_import.remove(psa_import_menu_func)
-    for cls in reversed(classes):
-        bpy.utils.unregister_class(cls)
+    for module in reversed(_modules):
+        module.unregister()
 
 
 if __name__ == '__main__':

io_scene_psk_psa/psa/export/operators.py

@@ -658,10 +658,14 @@ class PSA_OT_export_bone_collections_deselect_all(Operator):
         return {'FINISHED'}
 
 
-classes = (
+_classes = (
     PSA_OT_export,
     PSA_OT_export_actions_select_all,
     PSA_OT_export_actions_deselect_all,
     PSA_OT_export_bone_collections_select_all,
     PSA_OT_export_bone_collections_deselect_all,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)
+

io_scene_psk_psa/psa/export/properties.py

@@ -262,10 +262,14 @@ def filter_sequences(pg: PSA_PG_export, sequences) -> List[int]:
     return flt_flags
 
 
-classes = (
+_classes = (
     PSA_PG_export_action_list_item,
     PSA_PG_export_timeline_markers,
     PSA_PG_export_nla_strip_list_item,
     PSA_PG_export_active_action_list_item,
     PSA_PG_export,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)
+

io_scene_psk_psa/psa/export/ui.py

@@ -52,6 +52,10 @@ class PSA_UL_export_sequences(UIList):
         return flt_flags, flt_neworder
 
 
-classes = (
+_classes = (
     PSA_UL_export_sequences,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)
+

io_scene_psk_psa/psa/import_/operators.py

@@ -438,7 +438,7 @@ class PSA_FH_import(FileHandler):  # TODO: rename and add handling for PSA expor
         return context.area and context.area.type == 'VIEW_3D'
 
 
-classes = (
+_classes = (
     PSA_OT_import_sequences_select_all,
     PSA_OT_import_sequences_deselect_all,
     PSA_OT_import_sequences_select_from_text,
@@ -447,3 +447,6 @@ classes = (
     PSA_OT_import_drag_and_drop,
     PSA_FH_import,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)

io_scene_psk_psa/psa/import_/properties.py

@@ -175,9 +175,12 @@ def get_visible_sequences(pg: PSA_PG_import, sequences) -> List[PSA_PG_import_ac
     return visible_sequences
 
 
-classes = (
+_classes = (
     PSA_PG_import_action_list_item,
     PSA_PG_bone,
     PSA_PG_data,
     PSA_PG_import,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)

io_scene_psk_psa/psa/import_/ui.py

@@ -42,8 +42,11 @@ class PSA_UL_import_actions(PSA_UL_sequences_mixin):
     pass
 
 
-classes = (
+_classes = (
     PSA_UL_sequences,
     PSA_UL_import_sequences,
     PSA_UL_import_actions,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)

io_scene_psk_psa/psk/export/operators.py

@@ -509,7 +509,7 @@ class PSK_OT_export(Operator, ExportHelper):
         return {'FINISHED'}
 
 
-classes = (
+_classes = (
     PSK_OT_material_list_move_up,
     PSK_OT_material_list_move_down,
     PSK_OT_export,
@@ -521,3 +521,6 @@ classes = (
     PSK_OT_material_list_name_move_down,
     PSK_OT_material_list_name_add,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)

io_scene_psk_psa/psk/export/properties.py

@@ -67,8 +67,12 @@ class PSK_PG_export(PropertyGroup, PskExportMixin):
     pass
 
 
-classes = (
+_classes = (
     PSK_PG_material_list_item,
     PSK_PG_material_name_list_item,
     PSK_PG_export,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)
+

io_scene_psk_psa/psk/export/ui.py

@@ -10,6 +10,9 @@ class PSK_UL_material_names(UIList):
         row.prop(item, 'material_name', text='', emboss=False, icon_value=icon_value, icon='BLANK1' if icon_value == 0 else 'NONE')
 
 
-classes = (
+_classes = (
     PSK_UL_material_names,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)

io_scene_psk_psa/psk/import_/operators.py

@@ -171,8 +171,12 @@ class PSK_FH_import(FileHandler):
         return context.area and context.area.type == 'VIEW_3D'
 
 
-classes = (
+_classes = (
     PSK_OT_import,
     PSK_OT_import_drag_and_drop,
     PSK_FH_import,
+    PSK_OT_create_bones_from_selected_objects,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)

io_scene_psk_psa/psk/properties.py

@@ -145,6 +145,10 @@ class PskImportMixin:
     )
 
 
-classes = (
+_classes = (
     PSX_PG_material,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)
+

io_scene_psk_psa/psk/ui.py

@@ -23,6 +23,10 @@ class PSK_PT_material(Panel):
         col.prop(material.psk, 'mesh_triangle_bit_flags', expand=True, text='Flags')
 
 
-classes = (
+_classes = (
     PSK_PT_material,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)
+

io_scene_psk_psa/shared/types.py

@@ -154,10 +154,13 @@ class PSX_PG_scene_export(PropertyGroup, TransformMixin):
     pass
 
 
-classes = (
+_classes = (
     PSX_PG_scene_export,
     PSX_PG_action_export,
     PSX_PG_bone_collection_list_item,
     PSX_UL_bone_collection_list,
     PSX_PT_action,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)

io_scene_psk_psa/shared/ui.py

@@ -50,6 +50,10 @@ class PSX_PT_scene(Panel):
             flow.prop(psx_export, 'up_axis')
 
 
-classes = (
+_classes = (
     PSX_PT_scene,
 )
+
+from bpy.utils import register_classes_factory
+register, unregister = register_classes_factory(_classes)
+