def resources_fs(self):
"""
A filesystem that XBlocks can use to read large binary assets.
"""
# TODO: implement this to serve any static assets that
# self._active_block has in its blockstore "folder". But this API should
# be deprecated and we should instead get compatible XBlocks to use a
# runtime filesystem service. Some initial exploration of that (as well
# as of the 'FileField' concept) has been done and is included in the
# XBlock repo at xblock.reference.plugins.FSService and is available in
# the old runtime as the 'fs' service.
warnings.warn(
"Use of legacy runtime.resources_fs or .filestore won't be able to find resources.",
stacklevel=3,
)
fake_fs = MemoryFS()
fake_fs.root_path = 'mem://' # Required for the video XBlock's use of edxval create_transcript_objects
return fake_fs
