AttributeError: 'Version' object has no attribute 'release' after upgrade to 6.1.0

[P403n1x87]

We have jobs in CI that depend on the latest version of this extension and so as soon as 6.1.0 became available on PyPI we started hitting the following error:

Traceback (most recent call last):
  File "setup.py", line 150, in <module>
    setup(
  File "/usr/lib/python3/dist-packages/setuptools/__init__.py", line 144, in setup
    return distutils.core.setup(**attrs)
  File "/usr/lib/python3.8/distutils/core.py", line 108, in setup
    _setup_distribution = dist = klass(attrs)
  File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 447, in __init__
    _Distribution.__init__(self, {
  File "/usr/lib/python3.8/distutils/dist.py", line 292, in __init__
    self.finalize_options()
  File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 740, in finalize_options
    ep.load()(self)
  File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 747, in _finalize_setup_keywords
    ep.load()(self, ep.name, value)
  File "/home/circleci/project/.eggs/setuptools_scm-6.1.0-py3.8.egg/setuptools_scm/integration.py", line 26, in version_keyword
    dist.metadata.version = _get_version(config)
  File "/home/circleci/project/.eggs/setuptools_scm-6.1.0-py3.8.egg/setuptools_scm/__init__.py", line 188, in _get_version
    dump_version(
  File "/home/circleci/project/.eggs/setuptools_scm-6.1.0-py3.8.egg/setuptools_scm/__init__.py", line 94, in dump_version
    version_fields = parsed_version.release
AttributeError: 'Version' object has no attribute 'release'

Our setup.py has the following

    use_scm_version={"write_to": "ddtrace/_version.py"},
    setup_requires=["setuptools_scm[toml]>=4", "cython"],

and we also have

"packaging>=17.1",

in install_requires.

[RonnyPfannschmidt]

I'll get to debugging this as soon as the toddler is sleeping

[crockeo]

I'll leave it up to maintainers to provide a definitive answer, but it looks like this occurs because of an incompatibility between an old version of setuptools and a new version of setuptools_scm. This commit from October 2019 introduced the release field to Versions in the vendored copy of packaging bundled with setuptools which is included in any release after setuptools==42.0.0.

Tl;dr upgrade setuptools to setuptools>=42.0.0.

[RonnyPfannschmidt]

I suspect its a missed compatibility test between setuptools and packaging, please try a setuptools update as well (i believe i missed that old setuptools vendors a too old packaging)

Any setuptools that tries to use pip instead of easy install is likely recent enough

[RonnyPfannschmidt]

@crockeo thanks for verifying my suspicion faster than I send it out

[crockeo]

Just dealt with a support ticket about this earlier today, so I wanted to share my findings upstream 🙂

[RonnyPfannschmidt]

yanked the release now that i'm back at the computer, will work on a fix now

[RonnyPfannschmidt]

i finished analysis - setuptools is ignoring the requirement for setuptools >= 45

the line in https://github.com/pypa/setuptools_scm/blob/main/setup.py#L31 should have sorted the issue, it didn't

[henryiii]

setup.py isn't run (or included) when you install from a wheel, so virtually no one should see that error.

[RonnyPfannschmidt]

@henryiii the error happens in a build egg location, so it is executed

[mspang]

I'd suggest finding a way to retain compatibility with older setuptools as virtualenvs with older setuptools than you require are produced by default on every system I've tried.

[henryiii]

(Not that I like being stuck with old versions of things, but I agree - upgrading setuptools as a requirement has always been very hard to do. It's solved by PEP 517, but not everyone is using that (though I'm not sure why not).)

[muthu-tech]

Pip installation that was working with python36-devel stopped working while called via DockerFile. And I tried setuptools latest version, still it throws AttributeError: 'Version' object has no attribute 'release'.

Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-tzjqsevs/petl/

Can someone please let me know any options worth trying to get back working pip installations via docker

[RonnyPfannschmidt]

@muthu-tech update pip and setuptools

[muthu-tech]

@muthu-tech update pip and setuptools

@RonnyPfannschmidt I did that . I have ,
python3 -m pip install --upgrade pip

python3 -m pip install -r requirements.txt

and first entry in requirements.txt has setuptools==57.4.0

And it throws

ERROR: Could not install packages due to an OSError: [Errno 39] Directory not empty: 'pycache'

FYI, these commands are inside a dockerfile and pip installations were working fine until last week and right now they are broken.

[RonnyPfannschmidt]

Update setuptools first in requirements is too late