check for existing files

Author: nleroy917

fastembed/common/model_management.py

@@ -131,7 +131,7 @@ def retrieve_model_gcs(cls, model_name: str, source_url: str, cache_dir: str) ->
         model_tmp_dir = cache_tmp_dir / fast_model_name
         model_dir = Path(cache_dir) / fast_model_name
 
-        if model_dir.exists():
+        if model_dir.exists() and len(list(model_dir.glob("*"))) > 0:
             return model_dir
 
         if model_tmp_dir.exists():