feat(rag): Support RAG SDK (#1322)

dbgpt/util/chat_util.py

@@ -1,19 +1,21 @@
 import asyncio
 from typing import Any, Coroutine, List
 
-from dbgpt.app.scene import BaseChat, ChatFactory
-
-chat_factory = ChatFactory()
-
 
 async def llm_chat_response_nostream(chat_scene: str, **chat_param):
     """llm_chat_response_nostream"""
+    from dbgpt.app.scene import BaseChat, ChatFactory
+
+    chat_factory = ChatFactory()
     chat: BaseChat = chat_factory.get_implementation(chat_scene, **chat_param)
     res = await chat.get_llm_response()
     return res
 
 
 async def llm_chat_response(chat_scene: str, **chat_param):
+    from dbgpt.app.scene import BaseChat, ChatFactory
+
+    chat_factory = ChatFactory()
     chat: BaseChat = chat_factory.get_implementation(chat_scene, **chat_param)
     return chat.stream_call()
 

dbgpt/util/parameter_utils.py

@@ -226,7 +226,7 @@ class EnvArgumentParser:
         **kwargs,
     ) -> Any:
         """Parse parameters from environment variables and command lines and populate them into data class"""
-        parser = argparse.ArgumentParser()
+        parser = argparse.ArgumentParser(allow_abbrev=False)
         for field in fields(dataclass_type):
             env_var_value: Any = _genenv_ignoring_key_case_with_prefixes(
                 field.name, env_prefixes