Document more HfFilesyStem Methods (#2380)

* feat: add fsspec docstrings to HfFileSystem in docs

* fix

* add .

* format

---------

Co-authored-by: Lucain Pouget <lucainp@gmail.com>

docs/source/en/package_reference/hf_file_system.md

@@ -10,7 +10,6 @@ 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
+[[autodoc]] HfFileSystem 
     - __init__
-    - resolve_path
-    - ls
+    - all

src/huggingface_hub/hf_file_system.py

@@ -1,3 +1,4 @@
+import inspect
 import os
 import re
 import tempfile
@@ -889,3 +890,20 @@ def _raise_file_not_found(path: str, err: Optional[Exception]) -> NoReturn:
 
 def reopen(fs: HfFileSystem, path: str, mode: str, block_size: int, cache_type: str):
     return fs.open(path, mode=mode, block_size=block_size, cache_type=cache_type)
+
+
+# Add docstrings to the methods of HfFileSystem from fsspec.AbstractFileSystem
+for name, function in inspect.getmembers(HfFileSystem, predicate=inspect.isfunction):
+    parent = getattr(fsspec.AbstractFileSystem, name, None)
+    if parent is not None and parent.__doc__ is not None:
+        parent_doc = parent.__doc__
+        parent_doc = parent_doc.replace("Parameters\n        ----------\n", "Args:\n")
+        parent_doc = parent_doc.replace("Returns\n        -------\n", "Return:\n")
+        function.__doc__ = (
+            (
+                "\n_Docstring taken from "
+                f"[fsspec documentation](https://filesystem-spec.readthedocs.io/en/latest/api.html#fsspec.spec.AbstractFileSystem.{name})._"
+            )
+            + "\n\n"
+            + parent_doc
+        )