sync-sdk, remove generated code for mgmt (#3164)

* remove generated code

* use os.remove

Author: XiaofeiCao

eng/sdk/sync_sdk.py

@@ -125,8 +125,9 @@ def update_sdks():
         generated_test_exists = os.path.isdir(generated_test_path)
 
         if arm_module:
-            logging.info("Delete source code of resourcemanager module %s", artifact)
-            shutil.rmtree(os.path.join(module_path, "src", "main"))
+            logging.info("Delete generated source code of resourcemanager module %s", artifact)
+            shutil.rmtree(os.path.join(module_path, "src", "main", "resources"), ignore_errors=True)
+            delete_generated_source_code(os.path.join(module_path, "src", "main", "java"))
 
         logging.info(f"Generate for module {artifact}")
         try:
@@ -168,6 +169,28 @@ def update_sdks():
         logging.error(f"Failed modules {failed_modules}")
 
 
+def delete_generated_source_code(path: str) -> None:
+    autorest_generated_header = "Code generated by Microsoft (R) AutoRest Code Generator"
+    typespec_generated_header = "Code generated by Microsoft (R) TypeSpec Code Generator"
+    if os.path.exists(path):
+        for file in os.listdir(path):
+            cur_path = os.path.join(path, file)
+            if os.path.isdir(cur_path):
+                # Recurse into subdirectory
+                delete_generated_source_code(cur_path)
+            else:
+                try:
+                    # Read file content and check for header
+                    with open(cur_path, 'r', encoding='utf-8') as f:
+                        content = f.read()
+                    if autorest_generated_header in content or typespec_generated_header in content:
+                        os.remove(cur_path)  # Delete the file
+                except Exception as e:
+                    # Skip files that can't be read (binary files, permission issues)
+                    print(f"Warning: Could not process file {cur_path}: {e}")
+                    continue
+
+
 def main():
     global sdk_root