v6.1.0 breaks setuptools_scm_git_archive — AttributeError: 'NoneType' object has no attribute 'version_cls'

[sbraz]

HI,
I think a minor release should not break packages so I am creating a report here (I will also create one at https://github.com/Changaco/setuptools_scm_git_archive/).

Commit fbadf5b broke setuptools_scm_git_archive. Here is an example traceback:

/usr/local/lib/python3.9/site-packages/setuptools_scm/version.py:212: UserWarning: meta invoked without explicit configuration, will use defaults where required.
  warnings.warn(
Traceback (most recent call last):
  File "/pikepdf-2.16.1/setup.py", line 38, in <module>
    __version__ = get_version()
  File "/usr/local/lib/python3.9/site-packages/setuptools_scm/__init__.py", line 170, in get_version
    return _get_version(config)
  File "/usr/local/lib/python3.9/site-packages/setuptools_scm/__init__.py", line 174, in _get_version
    parsed_version = _do_parse(config)
  File "/usr/local/lib/python3.9/site-packages/setuptools_scm/__init__.py", line 127, in _do_parse
    version = _version_from_entrypoints(config) or _version_from_entrypoints(
  File "/usr/local/lib/python3.9/site-packages/setuptools_scm/__init__.py", line 65, in _version_from_entrypoints
    version = _call_entrypoint_fn(root, config, ep.load())
  File "/usr/local/lib/python3.9/site-packages/setuptools_scm/__init__.py", line 54, in _call_entrypoint_fn
    return fn(root)
  File "/usr/local/lib/python3.9/site-packages/setuptools_scm_git_archive/__init__.py", line 21, in parse
    return archival_to_version(data)
  File "/usr/local/lib/python3.9/site-packages/setuptools_scm_git_archive/__init__.py", line 15, in archival_to_version
    return meta(versions[0])
  File "/usr/local/lib/python3.9/site-packages/setuptools_scm/version.py", line 216, in meta
    parsed_version = _parse_tag(tag, preformatted, config)
  File "/usr/local/lib/python3.9/site-packages/setuptools_scm/version.py", line 195, in _parse_tag
    version_cls = config.version_cls or VERSION_CLASS
AttributeError: 'NoneType' object has no attribute 'version_cls'

This can be easily reproduced with this Dockerfile:

FROM python:3.9
RUN wget -nv https://github.com/pikepdf/pikepdf/archive/v2.16.1.tar.gz
RUN tar xf v2.16.1.tar.gz
WORKDIR pikepdf-2.16.1

RUN pip3 install setuptools_scm_git_archive
# Bad 
RUN pip3 install git+https://github.com/pypa/setuptools_scm@fbadf5b060cdd7ec1fb3d29d885868b7b756497c

# The parent commit was still good
#RUN pip3 install git+https://github.com/pypa/setuptools_scm@b8451688b9cb295136c0154c7c59c25a9d88f844

RUN python setup.py --version

[RonnyPfannschmidt]

thanks for the note, the version has been pulled as it showed a number of other bugs/regressions around setuptools itself

its a bug nonetheless

[sbraz]

Thanks for the reply. Yes, I noticed that both 6.1.0 and 6.2.0 were missing from PyPI and we at Gentoo have already blocked 6.2.0 entirely because of the setuptools_scm[tom] breakage, maybe we should do the same with 6.1.0.

[RonnyPfannschmidt]

@sbraz yes, please block them

the next release will include 3 bugfixes

• adding the extra again
• ensuring we break on outdated/broken setuptools
• allowing to pass none as config

[mgorny]

Could you please consider removing the two newest releases from pypi? Right now random packages are forcing <6.1.0 (in various ways), and cleaning this up after the next release is going to be painful.

[RonnyPfannschmidt]

They are yanked

[jasonmlkang]

FYI, mine is fixed after updating pip to the latest version.