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spec: support exists() on directories pre-cache #237

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Jun 8, 2021
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4 changes: 4 additions & 0 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
@@ -1,4 +1,8 @@
**Change Log**
v0.7.5
------
- `exists()` calls now also checks whether a directory with that name exists or not. Previously this was only checked from the cache.

v0.7.4
------
- Added the location_mode parameter to AzureBlobFileSystem object, and set default to "primary" to enable Access Control Lists and RA-GRS access. Valid values are "primary" and "secondary"
Expand Down
15 changes: 13 additions & 2 deletions adlfs/spec.py
Original file line number Diff line number Diff line change
Expand Up @@ -1285,8 +1285,19 @@ async def _exists(self, path):
return True

async with self.service_client.get_blob_client(container_name, path) as bc:
exists = await bc.exists()
return exists
if await bc.exists():
return True

dir_path = path.rstrip("/") + "/"
async with self.service_client.get_container_client(
container=container_name
) as container_client:
async for blob in container_client.list_blobs(
results_per_page=1, name_starts_with=dir_path
):
return True
else:
return False

async def _pipe_file(self, path, value, overwrite=True, **kwargs):
"""Set the bytes of given file"""
Expand Down
18 changes: 18 additions & 0 deletions adlfs/tests/test_spec.py
Original file line number Diff line number Diff line change
Expand Up @@ -1206,3 +1206,21 @@ def test_exists(storage):
assert not fs.exists("non-existent-container/")
assert fs.exists("")
assert not fs.exists("data/not-a-key")


def test_exists_directory(storage):
fs = AzureBlobFileSystem(
account_name=storage.account_name, connection_string=CONN_STR
)

fs.mkdir("temp_exists")
fs.touch("temp_exists/data/data.txt")
fs.touch("temp_exists/data/something/data.txt")
fs.invalidate_cache()

assert fs.exists("temp_exists/data/something/")
assert fs.exists("temp_exists/data/something")
assert fs.exists("temp_exists/data/")
assert fs.exists("temp_exists/data")
assert fs.exists("temp_exists/")
assert fs.exists("temp_exists")