[HfFileSystem] add expand_info arg (#3575)

* hffs: expand_info arg

* style

* Update src/huggingface_hub/hf_file_system.py

Co-authored-by: célina <[email protected]>

* up-to-date HfFileSystem docstring

---------

Co-authored-by: célina <[email protected]>

Author: lhoestq

docs/source/en/package_reference/hf_file_system.md

@@ -10,6 +10,4 @@ The `HfFileSystem` class provides a pythonic file interface to the Hugging Face
 
 `HfFileSystem` is based on [fsspec](https://filesystem-spec.readthedocs.io/en/latest/), so it is compatible with most of the APIs that it offers. For more details, check out [our guide](../guides/hf_file_system) and fsspec's [API Reference](https://filesystem-spec.readthedocs.io/en/latest/api.html#fsspec.spec.AbstractFileSystem).
 
-[[autodoc]] HfFileSystem 
-    - __init__
-    - all
+[[autodoc]] HfFileSystem

src/huggingface_hub/hf_file_system.py

@@ -123,13 +123,20 @@ class HfFileSystem(fsspec.AbstractFileSystem, metaclass=_Cached):
     >     layer. For better performance and reliability, it's recommended to use `HfApi` methods when possible.
 
     Args:
-        token (`str` or `bool`, *optional*):
+        endpoint (`str`, *optional*):
+                Endpoint of the Hub. Defaults to <https://huggingface.co>.
+        token (`bool` or `str`, *optional*):
             A valid user access token (string). Defaults to the locally saved
             token, which is the recommended method for authentication (see
             https://huggingface.co/docs/huggingface_hub/quick-start#authentication).
             To disable authentication, pass `False`.
-        endpoint (`str`, *optional*):
-            Endpoint of the Hub. Defaults to <https://huggingface.co>.
+        block_size (`int`, *optional*):
+            Block size for reading and writing files.
+        expand_info (`bool`, *optional*):
+            Whether to expand the information of the files.
+        **storage_options (`dict`, *optional*):
+            Additional options for the filesystem. See [fsspec documentation](https://filesystem-spec.readthedocs.io/en/latest/api.html#fsspec.spec.AbstractFileSystem.__init__).
+
     Usage:
 
     ```python
@@ -164,13 +171,15 @@ def __init__(
         endpoint: Optional[str] = None,
         token: Union[bool, str, None] = None,
         block_size: Optional[int] = None,
+        expand_info: Optional[bool] = None,
         **storage_options,
     ):
         super().__init__(*args, **storage_options)
         self.endpoint = endpoint or constants.ENDPOINT
         self.token = token
         self._api = HfApi(endpoint=endpoint, token=token)
         self.block_size = block_size
+        self.expand_info = expand_info
         # Maps (repo_type, repo_id, revision) to a 2-tuple with:
         #  * the 1st element indicating whether the repositoy and the revision exist
         #  * the 2nd element being the exception raised if the repository or revision doesn't exist
@@ -457,9 +466,12 @@ def _ls_tree(
         recursive: bool = False,
         refresh: bool = False,
         revision: Optional[str] = None,
-        expand_info: bool = False,
+        expand_info: Optional[bool] = None,
         maxdepth: Optional[int] = None,
     ):
+        expand_info = (
+            expand_info if expand_info is not None else (self.expand_info if self.expand_info is not None else False)
+        )
         resolved_path = self.resolve_path(path, revision=revision)
         path = resolved_path.unresolve()
         root_path = HfFileSystemResolvedPath(
@@ -760,7 +772,7 @@ def info(self, path: str, refresh: bool = False, revision: Optional[str] = None,
         resolved_path = self.resolve_path(path, revision=revision)
         path = resolved_path.unresolve()
         expand_info = kwargs.get(
-            "expand_info", False
+            "expand_info", self.expand_info if self.expand_info is not None else False
         )  # don't expose it as a parameter in the public API to follow the spec
         if not resolved_path.path_in_repo:
             # Path is the root directory