Fix get file size on lfs (#1188)

* Fix get file size on LFS

* fix typos + add description

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -36,7 +36,7 @@ body:
         huggingface-cli env
         ```
 
-        If your are working in a notebook, please run it in a code cell:
+        If you are working in a notebook, please run it in a code cell:
         ```py
         from huggingface_hub import dump_environment_info
 

src/huggingface_hub/_commit_api.py

@@ -471,7 +471,7 @@ def fetch_upload_modes(
             if not path.endswith(".gitkeep"):
                 warnings.warn(
                     f"About to commit an empty file: '{path}'. Are you sure this is"
-                    " intended ?"
+                    " intended?"
                 )
             upload_modes[path] = "regular"
 

src/huggingface_hub/constants.py

@@ -46,6 +46,7 @@ def _is_true_or_auto(value: Optional[str]) -> bool:
 HUGGINGFACE_CO_URL_TEMPLATE = ENDPOINT + "/{repo_id}/resolve/{revision}/{filename}"
 HUGGINGFACE_HEADER_X_REPO_COMMIT = "X-Repo-Commit"
 HUGGINGFACE_HEADER_X_LINKED_ETAG = "X-Linked-Etag"
+HUGGINGFACE_HEADER_X_LINKED_SIZE = "X-Linked-Size"
 
 REPO_ID_SEPARATOR = "--"
 # ^ this substring is not allowed in repo_ids on hf.co

src/huggingface_hub/file_download.py

@@ -26,6 +26,7 @@
     HF_HUB_DISABLE_SYMLINKS_WARNING,
     HUGGINGFACE_CO_URL_TEMPLATE,
     HUGGINGFACE_HEADER_X_LINKED_ETAG,
+    HUGGINGFACE_HEADER_X_LINKED_SIZE,
     HUGGINGFACE_HEADER_X_REPO_COMMIT,
     HUGGINGFACE_HUB_CACHE,
     REPO_ID_SEPARATOR,
@@ -146,7 +147,8 @@ class HfFileMetadata:
         location (`str`):
             Location where to download the file. Can be a Hub url or not (CDN).
         size (`size`):
-            Size of the file.
+            Size of the file. In case of an LFS file, contains the size of the actual
+            LFS file, not the pointer.
     """
 
     commit_hash: Optional[str]
@@ -1384,7 +1386,10 @@ def get_hf_file_metadata(
         # Do not use directly `url`, as `_request_wrapper` might have followed relative
         # redirects.
         location=r.headers.get("Location") or r.request.url,  # type: ignore
-        size=_int_or_none(r.headers.get("Content-Length")),
+        size=_int_or_none(
+            r.headers.get(HUGGINGFACE_HEADER_X_LINKED_SIZE)
+            or r.headers.get("Content-Length")
+        ),
     )
 
 

src/huggingface_hub/utils/_runtime.py

@@ -182,6 +182,13 @@ def is_google_colab() -> bool:
 
 
 def dump_environment_info() -> Dict[str, Any]:
+    """Dump information about the machine to help debugging issues.
+
+    Similar helper exist in:
+    - `datasets` (https://github.com/huggingface/datasets/blob/main/src/datasets/commands/env.py)
+    - `diffusers` (https://github.com/huggingface/diffusers/blob/main/src/diffusers/commands/env.py)
+    - `transformers` (https://github.com/huggingface/transformers/blob/main/src/transformers/commands/env.py)
+    """
     from huggingface_hub import HfFolder, whoami
     from huggingface_hub.utils import list_credential_helpers
 

tests/test_file_download.py

@@ -376,6 +376,17 @@ def test_get_hf_file_metadata_from_a_renamed_repo(self) -> None:
             url.replace(DUMMY_RENAMED_OLD_MODEL_ID, DUMMY_RENAMED_NEW_MODEL_ID),
         )
 
+    def test_get_hf_file_metadata_from_a_lfs_file(self) -> None:
+        """Test getting metadata from an LFS file.
+
+        Must get size of the LFS file, not size of the pointer file
+        """
+        url = hf_hub_url("gpt2", filename="tf_model.h5")
+        metadata = get_hf_file_metadata(url)
+
+        self.assertIn("cdn-lfs", metadata.location)  # Redirection
+        self.assertEqual(metadata.size, 497933648)  # Size of LFS file, not pointer
+
 
 class StagingCachedDownloadTest(unittest.TestCase):
     def test_download_from_a_gated_repo_with_hf_hub_download(self):