Deduplicate ipex initialization code

library/ipex_interop.py

@@ -0,0 +1,24 @@
+import torch
+
+
+def init_ipex():
+    """
+    Try to import `intel_extension_for_pytorch`, and apply
+    the hijacks using `library.ipex.ipex_init`.
+
+    If IPEX is not installed, this function does nothing.
+    """
+    try:
+        import intel_extension_for_pytorch as ipex  # noqa
+    except ImportError:
+        return
+
+    try:
+        from library.ipex import ipex_init
+
+        if torch.xpu.is_available():
+            is_initialized, error_message = ipex_init()
+            if not is_initialized:
+                print("failed to initialize ipex:", error_message)
+    except Exception as e:
+        print("failed to initialize ipex:", e)

library/model_util.py

@@ -5,15 +5,9 @@ import math
 import os
 import torch
 
-try:
-    import intel_extension_for_pytorch as ipex
+from library.ipex_interop import init_ipex
 
-    if torch.xpu.is_available():
-        from library.ipex import ipex_init
-
-        ipex_init()
-except Exception:
-    pass
+init_ipex()
 import diffusers
 from transformers import CLIPTextModel, CLIPTokenizer, CLIPTextConfig, logging
 from diffusers import AutoencoderKL, DDIMScheduler, StableDiffusionPipeline  # , UNet2DConditionModel