pip-compile sets wrong dependencies for social-auth-core under python3

[mhozza]

Describe the issue briefly here.
social-auth-core has different set of dependencies for python 2 and 3.
with python 2 it requires python-openid, whereas with python 3 it requires python3-openid.
When I install social-auth-core via pip, it installs the correct dependency.
When I generate a requirements.txt file, it adds a dependency for:
python-openid==2.2.5 # via social-auth-core, which is incopatible with python3.

Environment Versions

1. Linux
2. Python version: 3.6.2
3. pip version: 9.0.1
4. pip-tools version: 1.10.1

Steps to replicate

1. create a requirements.in with social-auth-core
2. run pip-compile requirements.in under python3

Expected result

python-openid dependency is:
python3-openid==3.0.10

Actual result

python-openid dependency is:
python-openid==2.2.5

[mhozza]

Hmm, this seems to be caching problem - seems like it reuses a cache generated from python2.
adding -r fixes the problem, but it would be nice to have separate cache for each python version or virtal env.

[mhozza]

Hmm, sorry, it does not fix it (it changed behaviour when I installed social-auth-core via pip - after that it put the right dependency).

[suutari-ai]

This sounds like the same issue as fixed in PR #571. Can you try if it works with master?

[vphilippon]

I fixed the exact same issue (with the same package) in pipenv by updating its patched-and-vendored version of pip-tools to use the latest fix in pip-tools master branch. I'm pretty sure it should be fixed.

When trying with the master branch, be sure to clear you cache too.

[vphilippon]

Closing, tell us if the issue still occurs on master.

[vphilippon]

(Nevermind, reopening to maybe avoid duplicated issues, as I have no idea of when an official release will be made.)

[vphilippon]

This is now fixed in 1.10.2
Make sure to clear you dependency cache: pip-compile --rebuild

[pdehaye]

that seems to have done it! weird bug...