from_ckpt not working properly on windows

[LyubimovVladislav]

Describe the bug

When attempting to use the StableDiffusionPipeline.from_ckpt() with HF checkpoint link on Windows OS, a HFValidationError exception is raised. This issue stems from how the Path is processed in the code here. On Windows, the repo_id and file_path will contain backslashes instead of forward slashes, resulting in an improper repo_id and file_path format. E.g., repo_id = 'runwayml\\stable-diffusion-v1-5', file_path = 'blob\\main\\v1-5-pruned-emaonly.ckpt'
This issue is not present on Linux systems.

Reproduction

from diffusers import StableDiffusionPipeline
StableDiffusionPipeline.from_ckpt('https://huggingface.co/runwayml/stable-diffusion-v1-5/blob/main/v1-5-pruned-emaonly.ckpt')

Logs

No response

System Info

• Platform: Windows-10-10.0.19045-SP0

• diffusers version: 0.16.1

• Python version: 3.10.6

• Huggingface_hub version: 0.14.1

  
  

• Platform: Linux-5.15.90.1-microsoft-standard-WSL2-x86_64-with-glibc2.35

• diffusers version: 0.16.1

• Python version: 3.10.6

• Huggingface_hub version: 0.14.1

[patrickvonplaten]

Hey @LyubimovVladislav,

Thanks a mille for the issue! Would you like to open a pull request that makes sure the line:

diffusers/src/diffusers/loaders.py

Line 1366 in 67cf044

ckpt_path = Path(pretrained_model_link_or_path)

and following work both on Linux and Windows?

I sadly don't have a Windows computer to test this