Pantsbuild fails to install cryptography-2.1.1

[jincetomvinfy]

I try to run a dockerized pants build for a scala project and it fails with an error message "error in cryptography setup command: Invalid environment marker: python_version < '3' ". I haven't manually specified anything to install cryptography. In the documentation of cryptography I could see that it happens either because of pip or setuptools is out of date. I tried to update this and there was no difference. It was working fine till 12 October 2017 (approx) and later it turned to be not functional.

I use the following versions of

Ubuntu -14.04

python -2.7.4

pants -1.0.0 (tried upgrading to 1.1.0 but no difference).

Any guidance would be highly appreciated.

[tiran]

Upgrade to the latest version of setuptools and pip, https://cryptography.readthedocs.io/en/latest/faq/#installing-cryptography-fails-with-invalid-environment-marker-python-version-3

[jincetomvinfy]

I already tried updating that. But that didn't resolve the issue and I have already mentioned that in the question

[alex]

Can you include a full traceback?

[jincetomvinfy]

please find the full traceback

[jincetomvinfy]

[jincetomvinfy]

[jincetomvinfy]

[jincetomvinfy]

[alex]

In the future, please post tracebacks as text, rather than as images, it makes things much simple to read.

Can you try upgrading to a newer version of pants, at least 1.1.2 or great.

[jincetomvinfy]

I tried to update pants to 1.2.0 which is the stable version after 1.1.0 (which I had already tried). But the problem is, our codebase is large and it has several dependencies that can't be resolved by this new version of pants. Since the migration is a time consuming task, and our team is blocked by this issue, can there be any other alternative work around?

[alex]

From my reading of the pex source code, it pins the version of setuptools it uses, and the versions it supports were bumped in more recent releases.

You'd have to ask the pants/pex team if there's a workaround on their side.

[jincetomvinfy]

Okay thanks for the info, if you come to any solution from your side, please keep us posted here.

[aayush26]

 Downloading cryptography-2.1.1.tar.gz (441kB)

100% |████████████████████████████████| 450kB 2.3MB/s

Complete output from command python setup.py egg_info:

error in cryptography setup command: Invalid environment marker: platform_python_implementation != 'PyPy'

----------------------------------------

Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-0R7v1L/cryptography/

Is this error related to it? This error recently started to come while building my repo in Travis CI. Earlier, this issue never came.

$ python --version

Python 2.7.10 (7e8df3df9641, Jun 14 2016, 13:58:02)

[PyPy 5.3.1 with GCC 4.8.2]

$ pip --version

pip 8.1.2 from /home/travis/virtualenv/pypy-5.3.1/site-packages (python 2.7)

[alex]

That error indicates an out of date version of setuptools, please try upgrading it.

[aayush26]

@alex From which version of setuptools onwards, this issue should be resolved?

[alex]

18.5 or greater I believe.

Closing this issue as there's no cryptography bug here.