feat: only during development, touch sys.module

extension.patch

@@ -1,8 +1,8 @@
 diff --git a/src/io_scene_vrm/__init__.py b/src/io_scene_vrm/__init__.py
-index d4b623f0..5f4289fb 100644
+index 5ef8d2c6..5f4289fb 100644
 --- a/src/io_scene_vrm/__init__.py
 +++ b/src/io_scene_vrm/__init__.py
-@@ -1,231 +1,16 @@
+@@ -1,236 +1,17 @@
  # SPDX-License-Identifier: MIT
  # SPDX-FileCopyrightText: 2018 iCyP
 
@@ -70,10 +70,14 @@ index d4b623f0..5f4289fb 100644
 
  def unregister() -> None:
 - # Lazy import to minimize initialization before blender version checking.
+- import os
+-
 - from . import registration
 -
  registration.unregister()
-- cleanse_modules()
+
+- if os.getenv("BLENDER_VRM_DEVEMOPMENT_MODE") == "yes":
+- cleanse_modules()
 -
 -
 -def raise_error_if_too_old_blender() -> None:
@@ -233,14 +237,15 @@ index d4b623f0..5f4289fb 100644
 - )
 -
 - logger.warning("%s ...OK", log_warning_prefix)
- 
+-
 
  class glTF2ImportUserExtension:
+ def __init__(self) -> None:
 diff --git a/src/io_scene_vrm/blender_manifest.toml b/src/io_scene_vrm/blender_manifest.toml
-index 74e7bbf6..feb441dc 100644
+index 5adf614d..4feaa899 100644
 --- a/src/io_scene_vrm/blender_manifest.toml
 +++ b/src/io_scene_vrm/blender_manifest.toml
-@@ -13,8 +13,7 @@ website = "https://vrm-addon-for-blender.info"
+@@ -11,8 +11,7 @@ website = "https://vrm-addon-for-blender.info"
 
  tags = ["Import-Export", "Animation", "Modeling", "Material", "Physics"]
 

src/io_scene_vrm/__init__.py

@@ -63,10 +63,14 @@ def register() -> None:
 
 def unregister() -> None:
  # Lazy import to minimize initialization before blender version checking.
+ import os
+
  from . import registration
 
  registration.unregister()
- cleanse_modules()
+
+ if os.getenv("BLENDER_VRM_DEVEMOPMENT_MODE") == "yes":
+ cleanse_modules()
 
 
 def raise_error_if_too_old_blender() -> None: