zarr list directory shows . and trailing / handling

[jstriebel]

Context

The following wk-libs script recurses infinitely, since walking the zarr directories has an infinite loop:

import webknossos as wk
wk.Dataset.open_remote("https://webknossos.org/datasets/scalable_minds/l4_sample_dev").upload("l4_sample_dev_copy20")

This is the start of the debug output, when adding print(path) to _walk() in _upload_dataset.py:

https://data-humerus.webknossos.org/data/zarr/scalable_minds/l4_sample_dev
https://data-humerus.webknossos.org/data/zarr/scalable_minds/l4_sample_dev/.
https://data-humerus.webknossos.org/data/zarr/scalable_minds/l4_sample_dev/./.
https://data-humerus.webknossos.org/data/zarr/scalable_minds/l4_sample_dev/././.
https://data-humerus.webknossos.org/data/zarr/scalable_minds/l4_sample_dev/./././.
…

When visiting the respective sites, the listed folders and respective links seem to be off:
https://data-humerus.webknossos.org/data/zarr/scalable_minds/skin/

• skin: . leads to the same page (but probably should not be listed)
• color: skin/color leads to /data/zarr/scalable_minds/skin/skin/color, which is not valid

https://data-humerus.webknossos.org/data/zarr/scalable_minds/skin

• skin: . leads to the parent folder
• color: skin/color works

Expected Behavior

. should not be listed. Less important but nice to have: The human readable pages should have working links (probably simply color, and not color: skin/color). If a certain format is expected (trailing slash or not), there should be redirects to it.

Current Behavior

. is listed for folders of zarr routes:

>>> from upath import UPath
>>> list(UPath("https://data-humerus.webknossos.org/data/zarr/scalable_minds/l4_sample_dev").iterdir())
[HTTPPath('https://data-humerus.webknossos.org/data/zarr/scalable_minds/l4_sample_dev/.')]