Bringing back `from_single_file`

app.py

@@ -44,8 +44,12 @@ def load_pipeline(model_name):
         "madebyollin/sdxl-vae-fp16-fix",
         torch_dtype=torch.float16,
     )
-    pipeline = StableDiffusionXLPipeline.from_pretrained
-
+    pipeline = (
+        StableDiffusionXLPipeline.from_single_file
+        if MODEL.endswith(".safetensors")
+        else StableDiffusionXLPipeline.from_pretrained
+    )
+    
     pipe = pipeline(
         model_name,
         vae=vae,