tag_date incompatible with PEP 386?

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Originally reported by: ngrilly (Bitbucket: ngrilly, GitHub: ngrilly)

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The command egg_ingo, when used with the option tag-date, produces versions in a format similar to X.Y-YYYYMMDD which looks incompatible with PEP 386.

As I understand it, the incompatibility arises from the use of a character '-' before the date.

It causes some problems when tag-date is used in conjunction with more recent tools like "pip wheel".

What is your advice on this?

Thanks :)

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• Bitbucket: https://bitbucket.org/pypa/setuptools/issue/79

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Original comment by RonnyPfannschmidt (Bitbucket: RonnyPfannschmidt, GitHub: RonnyPfannschmidt):

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@jaraco, @dstufft - what deprecation/removal policy can we use here?