python setup.py develop is broken

[robnagler]

I'm working on fixing setup.py -- thanks to pip removing all public APIs, see radiasoft/pykern#23.

python setup.py develop (in testing) fails with:

Installed /home/vagrant/.pyenv/versions/2.7.14/envs/py2/lib/python2.7/site-packages/Flask_SQLAlchemy-2.3.2-py2.7.egg
error: The 'Flask' distribution was not found and is required by Flask-OAuthlib

However, pip install -e . works fine. I think this is due install_requires differences.

install_requires does not support git+ references. They added dependency_links, but they are removing those. I think we'll have some references in requirements.txt and others in install_requires, because nobody seems to know what to do with these git+ links.

In the end, the install scripts will just work, and that will be fine.

[robnagler]

There's no way to fix python setup.py develop to work right with a git+git reference. afaict python setup.py does not read requirements.txt. It was only working because requirements.txt was being read by pksetup and put in install_requires, but the git+git dependencies were getting stripped out.

Lots of discussion about this:

• pip install from package from github, with github dependencies  pypa/pip#3610
• Git+SSH dependencies have subtle (yet critical) differences from git clone pypa/pip#2124

Note that dependency_links is going away. I don't know the solution, frankly, but having some deps in requirements.txt is good enough. The rest should be install_requires.