[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2340: poor error reporting when "git describe" fails during setup.py update_version

[Tahoe-LAFS]

#2340: poor error reporting when "git describe" fails during setup.py
update_version
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 Reporter:  cipherpunks               |          Owner:  daira
     Type:  defect                    |         Status:  new
 Priority:  normal                    |      Milestone:  undecided
Component:  packaging                 |        Version:  1.10.0
 Keywords:  packaging error git easy  |  Launchpad Bug:
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 Suppose we are building from a copy of a git repo. If `git describe` fails
 (for example because `git` is not actually installed), the resulting
 `tahoe` will not know its version, but there will be no errors or warnings
 during the build. If `tahoe` does not know its version then some tests
 will fail when trying to import `allmydata._version`.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2340>
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