Detection for nested folders

datumaro/cli/util/project.py

@@ -120,12 +120,12 @@ def parse_full_revpath(s: str, ctx_project: Optional[Project] = None) \
 
     errors = []
     try:
-        return parse_dataset_pathspec(s, env=env), None
+        return parse_revspec(s, ctx_project=ctx_project)
     except (DatumaroError, OSError) as e:
         errors.append(e)
 
     try:
-        return parse_revspec(s, ctx_project=ctx_project)
+        return parse_dataset_pathspec(s, env=env), None
     except (DatumaroError, OSError) as e:
         errors.append(e)
 

datumaro/components/dataset.py

@@ -10,6 +10,7 @@
 from typing import (
     Any, Callable, Dict, Iterable, Iterator, List, Optional, Tuple, Type, Union,
 )
+import glob
 import inspect
 import logging as log
 import os
@@ -905,16 +906,25 @@ def import_from(cls, path: str, format: Optional[str] = None,
         return dataset
 
     @staticmethod
-    def detect(path: str, env: Optional[Environment] = None) -> str:
+    def detect(path: str, env: Optional[Environment] = None,
+            depth: Optional[int] = 2) -> str:
         if env is None:
             env = Environment()
 
-        matches = env.detect_dataset(path)
+        for _ in range(depth):
+            matches = env.detect_dataset(path)
+            if matches and len(matches) == 1:
+                return matches[0]
+
+            paths = glob.glob(osp.join(path, '*'))
+            if len(paths) != 1 or not osp.isdir(paths[0]):
+                break
+            path = paths[0]
+
         if not matches:
             raise NoMatchingFormatsError()
         if 1 < len(matches):
             raise MultipleFormatsMatchError(matches)
-        return matches[0]
 
 @contextmanager
 def eager_mode(new_mode: bool = True, dataset: Optional[Dataset] = None) -> None: