update webui and add CLIs

Former-commit-id: 1368dda22ab875914c9dd86ee5146a4f6a4736ad

src/llmtuner/hparams/parser.py

@@ -10,6 +10,7 @@ from transformers.trainer_utils import get_last_checkpoint
 from transformers.utils import is_torch_bf16_gpu_available
 from transformers.utils.versions import require_version
 
+from ..extras.constants import TRAINER_CONFIG
 from ..extras.logging import get_logger
 from ..extras.misc import check_dependencies, get_current_device
 from .data_args import DataArguments
@@ -251,7 +252,8 @@ def get_train_args(args: Optional[Dict[str, Any]] = None) -> _TRAIN_CLS:
         and can_resume_from_checkpoint
     ):
         last_checkpoint = get_last_checkpoint(training_args.output_dir)
-        if last_checkpoint is None and len(os.listdir(training_args.output_dir)) > 0:
+        files = os.listdir(training_args.output_dir)
+        if last_checkpoint is None and len(files) > 0 and (len(files) != 1 or files[0] != TRAINER_CONFIG):
             raise ValueError("Output directory already exists and is not empty. Please set `overwrite_output_dir`.")
 
         if last_checkpoint is not None: