drop the darcsver egg

[davidsarah]

darcsver-1.7.2.egg is probably no longer needed now that we're doing the 1.10 release completely in git.

[davidsarah]

I thought this was an easy ticket, but it turns out that removing darcsver-1.7.2.egg results in setup.py update_version breaking (even in a git checkout), with this error:

$ python setup.py build
/usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'versionfiles'
  warnings.warn(msg)
running update_version
Traceback (most recent call last):
  File "setup.py", line 468, in <module>
    **setup_args
  File "/usr/lib/python2.7/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/usr/lib/python2.7/distutils/dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "setup.py", line 341, in run
    target = self.distribution.versionfiles[0]
AttributeError: Distribution instance has no attribute 'versionfiles'

It's easy enough to tolerate lack of the 'versionfiles' attribute in setup.py, but I think that's the wrong fix.

[davidsarah]

Use this branch to reproduce the above error: ​https://github.com/davidsarah/tahoe-lafs/commits/1908-drop-darcsver-egg

[zooko]

We should replace the functionality that darcsver used to provide. The best way to do this would probably be to use Brian's "versioneer" (​https://blog.mozilla.org/warner/2012/01/31/version-string-management-in-python-introducing-python-versioneer/), like pycryptopp does (​https://tahoe-lafs.org/trac/pycryptopp/browser/git/setup.py?annotate=blame&rev=f789ed951b49b33e7cc49d16fdc8b398f7ec7223).

[Brian Warner <warner@…>]

In 19b2ef9764bdb201:

Remove darcs from setup.py, remove darcsver egg. Closes #1908.

Also remove lingering traces of darcs from MANIFEST.in,
.darcs-boringfile, setup.cfg, and unit tests.

[davidsarah]

Nice to see the automated ticket-close messages working again!