Incorrect detection of directories in AzureBlobPath

[M0dEx]

Currently, the detection of whether a given path points to a blob (file) or a directory is based mostly on the presence of its metadata:

cloudpathlib/cloudpathlib/azure/azblobclient.py

Lines 152 to 172 in 08b018b

	def _is_file_or_dir(self, cloud_path: AzureBlobPath) -> Optional[str]:
	# short-circuit the root-level container
	if not cloud_path.blob:
	return "dir"
	try:
	self._get_metadata(cloud_path)
	return "file"
	except ResourceNotFoundError:
	prefix = cloud_path.blob
	if prefix and not prefix.endswith("/"):
	prefix += "/"
	# not a file, see if it is a directory
	container_client = self.service_client.get_container_client(cloud_path.container)
	try:
	next(container_client.list_blobs(name_starts_with=prefix))
	return "dir"
	except StopIteration:
	return None

This is not correct, as directories can have non-empty metadata present (and in newer versions of Azure Blob Storage API they almost always do), which leads to incorrect is_file and is_dir results.

[pjbull]

This should be part of the ADLS Gen2 support released now in v0.19.0 if you want to upgrade and test your use case