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50 lines
2.0 KiB
50 lines
2.0 KiB
3 years ago
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Title: setuptools_scm-6.3.0 temporary runtime breakage
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Author: Arthur Zamarin <arthurzam@gentoo.org>
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Author: Sam James <sam@gentoo.org>
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Posted: 2021-09-05
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Revision: 1
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News-Item-Format: 2.0
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Display-If-Installed: =dev-python/setuptools_scm-6.3.0
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Users who upgraded to =dev-python/setuptools_scm-6.3.0 between 2021-09-03
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15:42 UTC and 2021-09-03 19:03 UTC may be affected by a bug [0]. If you have not
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upgraded to this version or have >=dev-python/setuptools_scm-6.3.0-r1 installed,
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you are not affected.
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A missing dependency in the setuptools_scm ebuild meant there was a timeframe in
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which anyone who installed dev-python/setuptools_scm and dev-python/packaging in
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the wrong order won't be able to build any Python package using setuptools
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unless a workaround is applied.
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Specifically, this affects users with =dev-python/setuptools_scm-6.3.0 installed
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and where dev-python/packaging is not installed (applies separately for each/any
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Python target). The bad tree state was between gentoo.git commits
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8882e54abf78d3af69faed5844e3ad441482f23e and
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0c76b447cd1be9cf611f649970851750304d9ca6.
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Affected users will see errors similar to the following when installing Python
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packages:
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```
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pkg_resources.DistributionNotFound: The 'packaging>=20.0' distribution was not
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found and is required by the application
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```
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To fix this manually, you need to fully remove all dev-python/setuptools_scm
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files by running the following commands:
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# Necessary to obtain a fixed version of setuptools_scm
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$ emerge --sync
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# --unmerge is NOT advised normally, but is required to avoid setuptools picking
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# up the runtime-broken setuptools_scm version when re-installing setuptools_scm
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$ emerge --unmerge =dev-python/setuptools_scm-6.3.0
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$ emerge --oneshot dev-python/setuptools dev-python/pyparsing dev-python/packaging
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$ emerge --oneshot ">=dev-python/setuptools_scm-6.3.0-r1"
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Note that the version specifiers above are not strictly necessary if you have an
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up-to-date copy of the tree but provide a safety net.
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[0] https://bugs.gentoo.org/811504
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