Bug: broken package on pre/2.1 branch

[d-v-b]

# /// script
# requires-python = ">=3.11"
# dependencies = [
#     "datajoint @ git+https://github.com/datajoint/datajoint-python.git@82a9223b484f639bd2cf26a9d48bc29d56cda8aa",
# ]
# ///
"""
Reproducer for circular import bug in datajoint pre/v2.1 branch.

Run with: uv run reproducer.py

Expected: datajoint imports successfully and prints version
Actual: ImportError due to missing builtin_codecs module

The issue is in datajoint/codecs.py:590 which tries to import:
    from . import builtin_codecs as _builtin_codecs
but builtin_codecs does not exist in the package.
"""

import datajoint

print(f"datajoint version: {datajoint.__version__}")

(dj-zarr-codecs) d-v-b@pc ➜  dj-zarr-codecs git:(chore/repo-housekeeping) ✗ uv run reproducer.py 
Traceback (most recent call last):
  File "/home/d-v-b/dev/dj-zarr-codecs/reproducer.py", line 20, in <module>
    import datajoint
  File "/home/d-v-b/.cache/uv/environments-v2/reproducer-561c46f342a40bb5/lib/python3.11/site-packages/datajoint/__init__.py", line 65, in <module>
    from .codecs import (
  File "/home/d-v-b/.cache/uv/environments-v2/reproducer-561c46f342a40bb5/lib/python3.11/site-packages/datajoint/codecs.py", line 590, in <module>
    from . import builtin_codecs as _builtin_codecs  # noqa: F401, E402
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ImportError: cannot import name 'builtin_codecs' from partially initialized module 'datajoint' (most likely due to a circular import) (/home/d-v-b/.cache/uv/environments-v2/reproducer-561c46f342a40bb5/lib/python3.11/site-packages/datajoint/__init__.py)

The root cause is the misconfiguration of setuptools in pyproject.toml. Setuptools is not finding subpackages (like builtin_codecs) and so they are not being packaged. The fix is to fix the setuptools configuration, or even better, use a modern build system like hatchling.

[dimitri-yatsenko]

Fixed in #1358