Latest Defopt installation raises AttributeError: 'Version' object has no attribute 'release'

[Ben-Habermeyer]

When installing latest defopt 6.1.0 (and any version 6.*) we have started to see

Collecting defopt (from -r requirements.txt (line 4))
  Downloading https://pypi.counsyl.com/root/pypi/%2Bf/cfe/6ecfb54b1368a/defopt-6.1.0.tar.gz
    ERROR: Complete output from command python setup.py egg_info:
    ERROR: Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-q7m_amiq/defopt/setup.py", line 50, in <module>
        keywords='argument parser parsing optparse argparse getopt docopt sphinx',
      File "/var/lib/go-agent/pipelines/make-ci-10/code/env/lib/python3.6/site-packages/setuptools/__init__.py", line 145, in setup
        return distutils.core.setup(**attrs)
      File "/var/lib/go-agent/pipelines/make-ci-10/code/env/lib/python3.6/distutils/core.py", line 108, in setup
        _setup_distribution = dist = klass(attrs)
      File "/var/lib/go-agent/pipelines/make-ci-10/code/env/lib/python3.6/site-packages/setuptools/dist.py", line 444, in __init__
        k: v for k, v in attrs.items()
      File "/var/lib/go-agent/pipelines/make-ci-10/code/env/lib/python3.6/distutils/dist.py", line 281, in __init__
        self.finalize_options()
      File "/var/lib/go-agent/pipelines/make-ci-10/code/env/lib/python3.6/site-packages/setuptools/dist.py", line 732, in finalize_options
        ep.load()(self, ep.name, value)
      File "/tmp/pip-install-q7m_amiq/defopt/.eggs/setuptools_scm-6.1.0-py3.6.egg/setuptools_scm/integration.py", line 26, in version_keyword
        dist.metadata.version = _get_version(config)
      File "/tmp/pip-install-q7m_amiq/defopt/.eggs/setuptools_scm-6.1.0-py3.6.egg/setuptools_scm/__init__.py", line 192, in _get_version
        template=config.write_to_template,
      File "/tmp/pip-install-q7m_amiq/defopt/.eggs/setuptools_scm-6.1.0-py3.6.egg/setuptools_scm/__init__.py", line 94, in dump_version
        version_fields = parsed_version.release
    AttributeError: 'Version' object has no attribute 'release'
    ----------------------------------------
ERROR: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-q7m_amiq/defopt/

The installation command is pip install --no-deps -r .requirements.txt with latest defopt in this requirements file.

Pinning version to lower 5.1.0 resolves this issue, but unfortunately we would like to use latest features.

[anntzer]

This is due to likely due to pypa/setuptools_scm#605 / pypa/setuptools_scm#612 and should be fixed on their side.

[Ben-Habermeyer]

thanks for narrowing this down @anntzer !