azure storage options (#365)

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

src/litdata/utilities/dataset_utilities.py

@@ -38,7 +38,9 @@ def subsample_streaming_dataset(
 
     # Make sure input_dir contains cache path and remote url
     if _should_replace_path(input_dir.path):
-        cache_path = _try_create_cache_dir(input_dir=input_dir.path if input_dir.path else input_dir.url)
+        cache_path = _try_create_cache_dir(
+            input_dir=input_dir.path if input_dir.path else input_dir.url, storage_options=storage_options
+        )
         if cache_path is not None:
             input_dir.path = cache_path
 
@@ -96,7 +98,7 @@ def _should_replace_path(path: Optional[str]) -> bool:
     return path.startswith("/teamspace/datasets/") or path.startswith("/teamspace/s3_connections/")
 
 
-def _read_updated_at(input_dir: Optional[Dir]) -> str:
+def _read_updated_at(input_dir: Optional[Dir], storage_options: Optional[Dict] = {}) -> str:
     """Read last updated timestamp from index.json file."""
     last_updation_timestamp = "0"
     index_json_content = None
@@ -110,7 +112,7 @@ def _read_updated_at(input_dir: Optional[Dir]) -> str:
         # download index.json file and read last_updation_timestamp
         with tempfile.TemporaryDirectory() as tmp_directory:
             temp_index_filepath = os.path.join(tmp_directory, _INDEX_FILENAME)
-            downloader = get_downloader_cls(input_dir.url, tmp_directory, [])
+            downloader = get_downloader_cls(input_dir.url, tmp_directory, [], storage_options)
             downloader.download_file(os.path.join(input_dir.url, _INDEX_FILENAME), temp_index_filepath)
 
             index_json_content = load_index_file(tmp_directory)
@@ -135,9 +137,9 @@ def _clear_cache_dir_if_updated(input_dir_hash_filepath: str, updated_at_hash: s
             shutil.rmtree(input_dir_hash_filepath)
 
 
-def _try_create_cache_dir(input_dir: Optional[str]) -> Optional[str]:
+def _try_create_cache_dir(input_dir: Optional[str], storage_options: Optional[Dict] = {}) -> Optional[str]:
     resolved_input_dir = _resolve_dir(input_dir)
-    updated_at = _read_updated_at(resolved_input_dir)
+    updated_at = _read_updated_at(resolved_input_dir, storage_options)
 
     if updated_at == "0" and input_dir is not None:
         updated_at = hashlib.md5(input_dir.encode()).hexdigest()  # noqa: S324