fix tox with dependency on python-parted

[Scott Moser]

after merging Wesley's partition code that uses python-parted, we now have broken the 'tox' environment that I had added just before.

tox fails due to python-parted not being 'pip installable'.
Below shows the problem, and a work around that probably works for 3.4 also but untested there.

$ tox -e py27
py27 develop-inst-noop: /home/smoser-public/src/curtin/trunk
py27 installed: PyYAML==3.11,argparse==1.2.1,-e bzr+file:///home/smoser-public/src/curtin/trunk.dist@229#egg=curtin-0.1.0-py2.7-dev_r229,funcsigs==0.4,mock==1.3.0,nose==1.3.7,pbr==1.3.0,six==1.9.0,urllib3==1.11,wsgiref==0.1.2
py27 runtests: PYTHONHASHSEED='1583728979'
py27 runtests: commands[0] | /home/smoser-public/src/curtin/trunk/.tox/py27/bin/python /home/smoser-public/src/curtin/trunk/tools/noproxy nosetests
.......................E.............
======================================================================
ERROR: Failure: ImportError (No module named parted)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/smoser-public/src/curtin/trunk/.tox/py27/local/lib/python2.7/site-packages/nose/loader.py", line 418, in loadTestsFromName
    addr.filename, addr.module)
  File "/home/smoser-public/src/curtin/trunk/.tox/py27/local/lib/python2.7/site-packages/nose/importer.py", line 47, in importFromPath
    return self.importFromDir(dir_path, fqname)
  File "/home/smoser-public/src/curtin/trunk/.tox/py27/local/lib/python2.7/site-packages/nose/importer.py", line 94, in importFromDir
    mod = load_module(part_fqname, fh, filename, desc)
  File "/home/smoser-public/src/curtin/trunk/tests/unittests/test_partitioning.py", line 4, in <module>
    import parted
ImportError: No module named parted

----------------------------------------------------------------------
Ran 37 tests in 0.093s

FAILED (errors=1)
ERROR: InvocationError: '/home/smoser-public/src/curtin/trunk/.tox/py27/bin/python /home/smoser-public/src/curtin/trunk/tools/noproxy nosetests'
_____________________________________________________________________________________________________ summary ______________________________________________________________________________________________________
ERROR: py27: commands failed

$ dpkg-query --show python-parted
python-parted 3.10.5-1build1

$ dpkg -L python-parted | while read f; do [ -f "$f" ] && echo $f; done
/usr/lib/python2.7/dist-packages/parted/decorators.py
/usr/lib/python2.7/dist-packages/parted/__init__.py
/usr/lib/python2.7/dist-packages/parted/geometry.py
/usr/lib/python2.7/dist-packages/parted/partition.py
/usr/lib/python2.7/dist-packages/parted/disk.py
/usr/lib/python2.7/dist-packages/parted/cachedlist.py
/usr/lib/python2.7/dist-packages/parted/device.py
/usr/lib/python2.7/dist-packages/parted/alignment.py
/usr/lib/python2.7/dist-packages/parted/constraint.py
/usr/lib/python2.7/dist-packages/parted/filesystem.py
/usr/lib/python2.7/dist-packages/pyparted-3.10.5.egg-info
/usr/lib/python2.7/dist-packages/_ped.x86_64-linux-gnu.so
/usr/share/doc/python-parted/README
/usr/share/doc/python-parted/copyright
/usr/share/doc/python-parted/TODO
/usr/share/doc/python-parted/BUGS
/usr/share/doc/python-parted/changelog.Debian.gz
/usr/share/doc/python-parted/examples/make_one_primary_partition.py.gz
/usr/share/doc/python-parted/HACKING.gz

$ cp -a /usr/lib/python2.7/dist-packages/parted/ .tox/py27/lib/python2.7/site-packages/

$ cp /usr/lib/python2.7/dist-packages/_ped.x86_64-linux-gnu.so .tox/py27/lib/python2.7/site-packages/parted/

$ tox -e py27
py27 develop-inst-noop: /home/smoser-public/src/curtin/trunk
py27 installed: PyYAML==3.11,argparse==1.2.1,-e bzr+file:///home/smoser-public/src/curtin/trunk.dist@229#egg=curtin-0.1.0-py2.7-dev_r229,funcsigs==0.4,mock==1.3.0,nose==1.3.7,pbr==1.3.0,six==1.9.0,urllib3==1.11,wsgiref==0.1.2
py27 runtests: PYTHONHASHSEED='3735920778'
py27 runtests: commands[0] | /home/smoser-public/src/curtin/trunk/.tox/py27/bin/python /home/smoser-public/src/curtin/trunk/tools/noproxy nosetests
.........................................
----------------------------------------------------------------------
Ran 41 tests in 0.103s

OK
_____________________________________________________________________________________________________ summary ______________________________________________________________________________________________________
  py27: commands succeeded
  congratulations :)

[Scott Moser (smoser)]

Also note, I did try 'sitepackages = True' in tox.ini, but that didn't work either.
it failed like:

$ tox --recreate -e py27
py27 create: /home/smoser-public/src/curtin/custom-partitioning-incremental-2/.tox/py27
py27 installdeps: -r/home/smoser-public/src/curtin/custom-partitioning-incremental-2/test-requirements.txt, -r/home/smoser-public/src/curtin/custom-partitioning-incremental-2/requirements.txt
py27 develop-inst: /home/smoser-public/src/curtin/custom-partitioning-incremental-2
Traceback (most recent call last):
  File "/usr/bin/tox", line 9, in <module>
    load_entry_point('tox==2.1.1', 'console_scripts', 'tox')()
  File "/usr/lib/python3/dist-packages/tox/session.py", line 39, in main
    retcode = Session(config).runcommand()
  File "/usr/lib/python3/dist-packages/tox/session.py", line 373, in runcommand
    return self.subcommand_test()
  File "/usr/lib/python3/dist-packages/tox/session.py", line 540, in subcommand_test
    output = py.process.cmdexec("%s freeze" % (pip))
  File "/usr/lib/python3/dist-packages/py/_process/cmdexec.py", line 28, in cmdexec
    raise ExecutionFailed(status, status, cmd, out, err)
py.process.cmdexec.Error: ExecutionFailed: 2 /home/smoser-public/src/curtin/custom-partitioning-incremental-2/.tox/py27/bin/pip freeze
Exception:
Traceback (most recent call last):
  File "/home/smoser-public/src/curtin/custom-partitioning-incremental-2/.tox/py27/local/lib/python2.7/site-packages/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/home/smoser-public/src/curtin/custom-partitioning-incremental-2/.tox/py27/local/lib/python2.7/site-packages/pip/commands/freeze.py", line 74, in run
    req = pip.FrozenRequirement.from_dist(dist, dependency_links, find_tags=find_tags)
  File "/home/smoser-public/src/curtin/custom-partitioning-incremental-2/.tox/py27/local/lib/python2.7/site-packages/pip/__init__.py", line 299, in from_dist
    assert len(specs) == 1 and specs[0][0] == '=='
AssertionError

Storing debug log for failure in /home/smoser/.pip/pip.log

[Scott Moser (smoser)]

we're gonna fix this by dropping python-parted.

[Scott Moser (smoser)]

This bug is believed to be fixed in curtin in 17.1. If this is still a problem for you, please make a comment and set the state back to New

Thank you.