feat(api): add support for PyTorch 2.0 (#292)

api/onnx_web/convert/diffusion/diffusers.py

@@ -11,6 +11,7 @@
 
 from logging import getLogger
 from os import mkdir, path
+from packaging import version
 from pathlib import Path
 from shutil import rmtree
 from typing import Dict, Tuple
@@ -22,6 +23,7 @@
     OnnxStableDiffusionPipeline,
     StableDiffusionPipeline,
 )
+from diffusers.models.cross_attention import CrossAttnProcessor
 from onnx import load_model, save_model
 from onnx.shape_inference import infer_shapes_path
 from onnxruntime.transformers.float16 import convert_float_to_float16
@@ -36,6 +38,8 @@
 
 logger = getLogger(__name__)
 
+is_torch_2_0 = version.parse(version.parse(torch.__version__).base_version) >= version.parse("2.0")
+
 
 def onnx_export(
     model,
@@ -168,6 +172,9 @@ def convert_diffusion_diffusers(
             device=ctx.training_device, dtype=torch.bool
         )
 
+    if is_torch_2_0:
+        pipeline.unet.set_attn_processor(CrossAttnProcessor())
+
     unet_in_channels = pipeline.unet.config.in_channels
     unet_sample_size = pipeline.unet.config.sample_size
     unet_path = output_path / "unet" / ONNX_MODEL