cffi fails to install: ImportError: No module named setuptools_ext

[tbelliard]

On Debian 8 (jessie), for some reason, the cryptography dependency 'cffi' fails to install when running setup.sh, returning the following error:

Complete output from command /usr/bin/python -c "import setuptools;__file__='/tmp/pip-build-vRodyG/cryptography/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" bdist_wheel -d /tmp/tmpObNFsBpip-wheel-:

  Installed /tmp/pip-build-vRodyG/cryptography/cffi-1.5.2-py2.7-linux-x86_64.egg
  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "/tmp/pip-build-vRodyG/cryptography/setup.py", line 318, in <module>
      **keywords_with_side_effects(sys.argv)
    File "/usr/lib/python2.7/distutils/core.py", line 111, in setup
      _setup_distribution = dist = klass(attrs)
    File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 266, in __init__
      _Distribution.__init__(self,attrs)
    File "/usr/lib/python2.7/distutils/dist.py", line 287, in __init__
      self.finalize_options()
    File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 301, in finalize_options
      ep.load()(self, ep.name, value)
    File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2190, in load
      ['__name__'])
  ImportError: No module named setuptools_ext

  ----------------------------------------
  Failed building wheel for cryptography
  Running setup.py bdist_wheel for contextlib2
  Stored in directory: /root/.cache/pip/wheels/69/10/11/32bef7b8857cbd724a51487711793db25d047d96cd7213c17e
  Running setup.py bdist_wheel for MarkupSafe
  Stored in directory: /root/.cache/pip/wheels/94/a7/79/f79a998b64c1281cb99fa9bbd33cfc9b8b5775f438218d17a7
  Running setup.py bdist_wheel for lazy-object-proxy
  Stored in directory: /root/.cache/pip/wheels/d5/a1/c9/c42eabc6c5a6b352393b2cc4c500da7c0253e218556cf1aaee
  Running setup.py bdist_wheel for wrapt
  Stored in directory: /root/.cache/pip/wheels/00/c5/bc/d83286f6a26384eb928e7f1818358f324ad15ac1447df6e267
  Running setup.py bdist_wheel for docutils
  Stored in directory: /root/.cache/pip/wheels/d5/32/4f/1347e8ac67071e8150a5dc69354a51a04ac065d0b48334f608
Successfully built nylas-production-python coverage httplib2 pytest pytest-xdist SQLAlchemy pymongo dnspython boto ipython Flask gevent gevent-socketio gunicorn mysqlclient chardet setproctitle gdata alembic iconv pep8 flake8 pyflakes html2text python-magic greenlet faulthandler pyinstrument simplejson uritemplate icalendar pynacl pyaml enum34 msgpack-python guppy redis hiredis mockredispy lunatic-python-bugfix vobject lxml arrow hypothesis Pympler psutil gevent-openssl backports.ssl itsdangerous gevent-websocket cchardet cython dnsq expiringdict regex Mako aniso8601 PyYAML contextlib2 MarkupSafe lazy-object-proxy wrapt docutils
Failed to build cryptography
Installing collected packages: contextlib2, raven, greenlet, gevent, colorlog, structlog, gunicorn, nylas-production-python, coverage, httplib2, pytest, apipkg, execnet, pytest-xdist, SQLAlchemy, pymongo, dnspython, boto, ipython, Werkzeug, MarkupSafe, Jinja2, itsdangerous, Flask, python-dateutil, freezegun, gevent-websocket, gevent-socketio, mysqlclient, chardet, setproctitle, gdata, cchardet, cython, expiringdict, dnsq, WebOb, redis, regex, flanker, Mako, alembic, iconv, pep8, pyflakes, mccabe, flake8, lazy-object-proxy, wrapt, astroid, pylint, html2text, python-magic, PyMySQL, click, faulthandler, pyinstrument, simplejson, aniso8601, pytz, Flask-RESTful, uritemplate, icalendar, pynacl, PyYAML, pyaml, enum34, msgpack-python, guppy, hiredis, funcsigs, pbr, mock, mockredispy, lunatic-python-bugfix, vobject, lxml, arrow, hypothesis, statsd, jmespath, futures, docutils, botocore, boto3, Pympler, psutil, idna, pyasn1, ipaddress, cryptography, pyopenssl, gevent-openssl, backports.ssl, imapclient
  Running setup.py install for python-dateutil
  Found existing installation: chardet 2.3.0
    Uninstalling chardet-2.3.0:
      Successfully uninstalled chardet-2.3.0
  Running setup.py install for flanker
  Found existing installation: lxml 3.4.0
    Uninstalling lxml-3.4.0:
      Successfully uninstalled lxml-3.4.0
  Found existing installation: pyasn1 0.1.7
    Uninstalling pyasn1-0.1.7:
      Successfully uninstalled pyasn1-0.1.7
  Found existing installation: cryptography 0.6.1
    Can't uninstall 'cryptography'. No files were found to uninstall.
  Running setup.py install for cryptography
    Complete output from command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-vRodyG/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-7UB0P4-record/install-record.txt --single-version-externally-managed --compile:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-vRodyG/cryptography/setup.py", line 318, in <module>
        **keywords_with_side_effects(sys.argv)
      File "/usr/lib/python2.7/distutils/core.py", line 111, in setup
        _setup_distribution = dist = klass(attrs)
      File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 266, in __init__
        _Distribution.__init__(self,attrs)
      File "/usr/lib/python2.7/distutils/dist.py", line 287, in __init__
        self.finalize_options()
      File "/usr/lib/python2.7/dist-packages/setuptools/dist.py", line 301, in finalize_options
        ep.load()(self, ep.name, value)
      File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2190, in load
        ['__name__'])
    ImportError: No module named setuptools_ext

    ----------------------------------------
  Can't roll back cryptography; was not uninstalled
Command "/usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-vRodyG/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-7UB0P4-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-vRodyG/cryptography

A bit of googling provided the following workaround : just install cffi manually with pip install --upgrade cffi and then run setup.sh again.

Being unfamiliar with pip I have no idea what is the exact cause of the problem.

[singhkays]

@tbelliard Should be fixed in #295

[spang]

Should be fixed in the latest release!