Use pip-tools to manage requirements.txt

[wragge]

I currently have a script to create requirements.txt and requirements-unpinned.txt files. A better approach would be to create a requirements.in file (using my unpinned file as a basis), then generate requirements.txt using pip-compile: https://github.com/jazzband/pip-tools/

This should help avoid pip problems and make it easier to keep things up to date.

[wragge]

Probably also need a dev-requirements.in.

Compile with pip-compile requirements.in this generates requirements.txt

Then pip-sync requirements.txt dev-requirements.txt to update current environment

Leave the dev files out of version control

[wragge]

To avoid conflicts between main and dev requirements you can add -c requirements.txt to the top of requirements-dev.in