Loading file in library fails in downstream packages

[edgarrmondragon]

Hey 👋

Starting with release 6.2.0, downstream packages dependent on a library that uses the equivalent of

import importlib_resources
import yaml

path = importlib_resources.files("my_lib").joinpath("default_logging.yml")

with path.open() as f:
    return yaml.safe_load(f)

fail with FileNotFoundError: Can't open orphan path.

This seems to only happen in Python 3.8 and 3.9.

For reference, meltano/sdk#2310 is a PR where I'm trying to fix things on my end in case I was using your APIs incorrectly, but still a breaking change might have been inadvertently introduced.

[potiuk]

Seems duplicate of #299

[potiuk]

(I've seen same error message when pytest_rewrite does it's job)

[jaraco]

The only change introduced with 6.2.0 was #295.

[Jakub-CZ]

#257 is back since importlib_resources 6.2.0

[jaraco]

The issue with jsonschema seems to be masking the underlying error, so it's hard to tell if it's the same FileNotFoundError.

That FileNotFoundError comes from the CompatibilityFiles adapter, which shouldn't be reached in the case of a legitimate resource provider:

importlib_resources/importlib_resources/_adapters.py

Lines 138 to 139 in 9f5b437

	def open(self, mode='r', *args, **kwargs):
	raise FileNotFoundError("Can't open orphan path")

Unfortunately, I've not yet been able to replicate the issue, even when using pytest:

 draft @ cat 298-repro.py
import sys

import importlib_resources as rs

assert sys.version_info < (3, 10)
__requires__ = ["importlib_resources>=6.2", "jaraco.text", "pytest"]


def test_open():
    path = rs.files("jaraco.text").joinpath("Lorem Ipsum.txt")
    with path.open() as f:
        f.read()
 draft @ py -3.9 -m pip-run -- -m pytest 298-repro.py
============================================================== test session starts ===============================================================
platform darwin -- Python 3.9.18, pytest-8.1.1, pluggy-1.4.0
rootdir: /Users/jaraco/draft
collected 1 item                                                                                                                                 

298-repro.py .                                                                                                                             [100%]

=============================================================== 1 passed in 0.01s ================================================================

Can anyone help devise a reproducer that I can run, preferably something minimal and including importlib_resources in the traceback? I need help reproducing what it is about the failing environments that leads to the CompatibiltyFiles / OrphanPath objects. Maybe something that minimally uses jsonschema might be helpful.