[v1] support switch v1 backend (#9226)

src/llamafactory/launcher.py

@@ -13,11 +13,45 @@
 # limitations under the License.
 
 
-def launch():
-    from llamafactory.train.tuner import run_exp  # use absolute import
+def run_api():
+    from llamafactory.api.app import run_api as _run_api
 
-    run_exp()
+    _run_api()
+
+
+def run_chat():
+    from llamafactory.chat.chat_model import run_chat as _run_chat
+
+    return _run_chat()
+
+
+def run_eval():
+    raise NotImplementedError("Evaluation will be deprecated in the future.")
+
+
+def export_model():
+    from llamafactory.train.tuner import export_model as _export_model
+
+    return _export_model()
+
+
+def run_exp():
+    from llamafactory.train.tuner import run_exp as _run_exp
+
+    return _run_exp()  # use absolute import
+
+
+def run_web_demo():
+    from llamafactory.webui.interface import run_web_demo as _run_web_demo
+
+    return _run_web_demo()
+
+
+def run_web_ui():
+    from llamafactory.webui.interface import run_web_ui as _run_web_ui
+
+    return _run_web_ui()
 
 
 if __name__ == "__main__":
-    launch()
+    run_exp()