Fix bug when variant and safetensor file does not match

[kaixuanliu]

No description provided.

[kaixuanliu]

This PR fixes bug under is_safetensors_compatible function: when variant and safetensor file does not match, this function should return False. For example, in this model: stable-diffusion-v1-5/stable-diffusion-inpainting, there is file diffusion_pytorch_model.fp16.safetensors, but when variant is None, it should return False instead of True

[kaixuanliu]

@a-r-r-o-w @DN6 , pls help review, thx.

[DN6]

@bot /style

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[DN6]

Thanks @kaixuanliu! I think we would need to add the variant check when there are no component folders as well.

    if not components:
        return any(".safetensors" in filename for filename in filenames)

And I think the changes will break the current is_safetensors_compatible tests here

diffusers/tests/pipelines/test_pipeline_utils.py

Line 25 in 05c8b42

class IsSafetensorsCompatibleTests(unittest.TestCase):

[kaixuanliu]

@DN6 , Hi, thanks for your advice. Have updated the code and test cases

[kaixuanliu]

@bot /style

[DN6]

@bot /style

[github-actions]

Style fixes have been applied. View the workflow run here.

[kaixuanliu]

@DN6 Hi, I have checked all the CI tests offline. Can you help trigger the CI workflow again?