Deprecate IFeedStorage.

scrapy/extensions/feedexport.py

@@ -88,25 +88,18 @@ class ItemFilter:
         return True  # accept all items by default
 
 
-class IFeedStorage(Interface):  # type: ignore[misc]
-    """Interface that all Feed Storages must implement"""
-
+class _IFeedStorage(Interface):  # type: ignore[misc]  # pragma: no cover
     # pylint: disable=no-self-argument
 
-    def __init__(uri, *, feed_options=None):  # type: ignore[no-untyped-def]  # pylint: disable=super-init-not-called
-        """Initialize the storage with the parameters given in the URI and the
-        feed-specific options (see :setting:`FEEDS`)"""
+    def __init__(uri, *, feed_options=None): ...  # type: ignore[no-untyped-def]  # pylint: disable=super-init-not-called
 
-    def open(spider):  # type: ignore[no-untyped-def]
-        """Open the storage for the given spider. It must return a file-like
-        object that will be used for the exporters"""
+    def open(spider): ...  # type: ignore[no-untyped-def]
 
-    def store(file):  # type: ignore[no-untyped-def]
-        """Store the given file stream"""
+    def store(file): ...  # type: ignore[no-untyped-def]
 
 
 class FeedStorageProtocol(Protocol):
-    """Reimplementation of ``IFeedStorage`` that can be used in type hints."""
+    """Protocol that all Feed Storages must follow."""
 
     def __init__(self, uri: str, *, feed_options: dict[str, Any] | None = None):
         """Initialize the storage with the parameters given in the URI and the
@@ -728,3 +721,14 @@ class FeedExporter:
             feed_options.get("item_filter", ItemFilter)
         )
         return item_filter_class(feed_options)
+
+
+def __getattr__(name: str) -> Any:  # pragma: no cover
+    if name == "IFeedStorage":
+        warnings.warn(
+            "scrapy.extensions.feedexport.IFeedStorage is deprecated.",
+            ScrapyDeprecationWarning,
+            stacklevel=2,
+        )
+        return _IFeedStorage
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")