'cp' is not recognized as an internal or external command (on Windows)

[JAY-IZEX-LLC]

Description:
When attempting to create a custom LoRA model using FaceChain on a Windows system, the process fails with the following error (train_style/demo.py):

'cp' is not recognized as an internal or external command, operable program or batch file.

This happens because FaceChain internally invokes a Python command like:

os.system('cp {} {}'.format(file_path, new_path))

However, the cp command is Unix/Linux specific and is not available in the Windows command prompt.

Expected Behavior:
The FaceChain process should copy files correctly and complete the creation of the custom LoRA model on any supported platform, including Windows.

Suggested Fix:
Update the code to use a cross-platform solution like Python’s shutil.copy instead of the cp shell command:

shutil.copy(file_path, new_path)

Index: train_style/demo.py
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/train_style/demo.py b/train_style/demo.py
--- a/train_style/demo.py	(revision 7bc7119c54deab7de6b29f0d14bd6f51d7d98a1c)
+++ b/train_style/demo.py	(date 1753092233061)
@@ -40,7 +40,7 @@
         # 放到临时目录
         if os.path.exists(new_path):
             os.remove(new_path)
-        os.system('cp {} {}'.format(file_path, new_path))
+        shutil.copy(file_path, new_path)
         # 居中裁剪图片到512*512
         cut_img(new_path)
         new_imgs.append([new_path, prompt])