PEP 639: Use SPDX license expressions in Core package metadata

[pombredanne]

This is a new PEP to improve the license information handled in Core metadata which is now more than ready to enter the formal PEP process.

The discussion has been taking at https://discuss.python.org/t/improving-license-clarity-with-better-package-metadata/2154 and in the original PR on my fork pombredanne#2

This has been triggered by several discussions in particular:

• https://github.com/pypa/warehouse/issues/2996
• Recommend the use of SPDX license descriptions pypa/interoperability-peps#46
• license in setup() pypa/packaging-problems#41
• Include more than one license file or other arbitrary files in metadata pypa/wheel#138
• Create draft PEP pombredanne/spdx-pypi-pep#1 (comment)
• Add new License-Expression field. Bump to version 2.2 pypa/packaging.python.org#635

Signed-off-by: Philippe Ombredanne pombredanne@nexb.com

[the-knights-who-say-ni]

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Thanks again for the contribution, we look forward to reviewing it!

[pombredanne]

@Steap ping. Your commits in this PR makes the CLA bot unhappy. We can solve this with either:

1. you signing a CLA
2. me squashing your commit and removing you from the commit history. You are already in Acknowledgements in all cases.

Thanks!

[pombredanne]

Dear @python/pep-editors this belated PR is ready for your consideration and get a number assigned!

[Steap]

2. me squashing your commit and removing you from the commit history. You are already in Acknowledgements in all cases.

OK, let's do this :) Thanks for working on this.

[uranusjr]

I prefer using the ID here since the slug changes if you edit the title. This should reliably point to the same thread: https://discuss.python.org/t/2154

[pombredanne]

@uranusjr done

[Rosuav]

It looks like 639 is the next available number, so go ahead and claim that one. CLA bot is now happy, so I think that's the final barrier to merging.

[pombredanne]

It looks like 639 is the next available number, so go ahead and claim that one. CLA bot is now happy, so I think that's the final barrier to merging.

@Rosuav done! thank you.

[Rosuav]

LGTM!

[pradyunsg]

Thanks @Rosuav! ^>^