python ports -- setuptools requiring the pbr module and failing on denied network access?

[Matthew Seaman]

So, I've been working on porting molecule
(https://pypi.org/project/molecule/), and I have a port that /almost/
works.  I can compile and run molecule from my shell prompt using the
port.  Everything seems fine.

Except when I try and build the port inside poudriere.  It seems that
python setuptools is requiring the pbr module at some particularly early
stage, and, well, it's not pretty:

=======================<phase: configure      >============================
===>   py27-molecule-2.18.1 depends on package: py27-setuptools>0 - found
===>   py27-molecule-2.18.1 depends on file: /usr/local/bin/python2.7 -
found
===>   py27-molecule-2.18.1 depends on file: /usr/local/bin/ccache - found
===>  Configuring for py27-molecule-2.18.1
Download error on https://pypi.org/simple/pbr/: [Errno 65] No route to
host -- Some packages may not be found!
Couldn't find index page for 'pbr' (maybe misspelled?)
Download error on https://pypi.org/simple/: [Errno 65] No route to host
-- Some packages may not be found!
No local packages or working download links found for pbr
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "setup.py", line 26, in <module>
    setup_requires=['pbr']
  File "/usr/local/lib/python2.7/site-packages/setuptools/__init__.py",
line 130, in setup
    _install_setup_requires(attrs)
  File "/usr/local/lib/python2.7/site-packages/setuptools/__init__.py",
line 125, in _install_setup_requires
    dist.fetch_build_eggs(dist.setup_requires)
  File "/usr/local/lib/python2.7/site-packages/setuptools/dist.py", line
514, in fetch_build_eggs
    replace_conflicting=True,
  File
"/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line
773, in resolve
    replace_conflicting=replace_conflicting
  File
"/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line
1056, in best_match
    return self.obtain(req, installer)
  File
"/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line
1068, in obtain
    return installer(requirement)
  File "/usr/local/lib/python2.7/site-packages/setuptools/dist.py", line
581, in fetch_build_egg
    return cmd.easy_install(req)
  File
"/usr/local/lib/python2.7/site-packages/setuptools/command/easy_install.py",
line 670, in easy_install
    raise DistutilsError(msg)
distutils.errors.DistutilsError: Could not find suitable distribution
for Requirement.parse('pbr')
*** Error code 1

So setuptools apparently tries to go to the net and download pbr, which
poudriere of course denies.  Adding the devel/py-pbr port as any of a
PATCH_, BUILD_ or RUN_DEPENDS doesn't help.

Any clues gratefully received.

	Cheers,

	Matthew

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