[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2876: tox won't run on ubuntu xenial: python3

[Tahoe-LAFS]

#2876: tox won't run on ubuntu xenial: python3
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     Reporter:  warner     |      Owner:  daira
         Type:  defect     |     Status:  new
     Priority:  major      |  Milestone:  1.13.0
    Component:  packaging  |    Version:  1.12.1
   Resolution:             |   Keywords:
Launchpad Bug:             |
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Comment (by warner):

 Ah, so I think the simplest solution is to have our setup.py look at
 `sys.argv`, and apply the py2-only check iff setup.py was invoked as
 `setup.py egg_info` or `setup.py install`. A pip install will do the
 former, and users may do the latter directly.

 PR in https://github.com/tahoe-lafs/tahoe-lafs/pull/422

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2876#comment:8>
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