Replace shutil.copy with shutil.copyfile

[almarouk]

shutil.copy copies permission bits which fails when the user who's running the script is trying to use a common cache that was generated by another user, even though the first user has read & write permissions over the cache (through Group permission for example). A real case scenario: submitting jobs on a GPU cluster accessed by multiple users with common cache directory to reduce disk and network usage.

diffusers/src/diffusers/utils/dynamic_modules_utils.py

Line 328 in 0d1d267

shutil.copy(resolved_module_file, submodule_path / module_file)

Suggested solution: replace shutil.copy by shutil.copyfile which doesn't copy ownership.

[almarouk]

Maybe related to huggingface/huggingface_hub#1220, #1517, huggingface/huggingface_hub#1141.
For info I'm using v0.23.0.

[sayakpaul]

@Wauplin WDYT?

[Wauplin]

Agree with using shutil.copyfile yes! I didn't thought about permission issues back then. copyfile will only copy the file content but that is what we want here :)

[yiyixuxu]

@almarouk would you be willing to open a PR to help us?