Request: direct integration with setup.py install_requires

[jamesbraza]

What's the problem this feature will solve?

I really like the flexibility pip-compile provides for inputting a requirements.in and outputting a requirements.txt that also pins dependencies.

Unfortunately, my company doesn't use requirements.txt, we solely center on setuptools.setup's install_requires=["pgk==1.0.0", ...] for our internal packages. So direct use of pip-compile will not out-of-the-box work for us.

One possible workaround is to use requirements.in with pip-compile and have setuptools.setup read from the generated requirements.txt as described here (simple) or here (advanced).

However, this is a workaround and requires:

• Deviation from our setup.py-only workflow
• DIY parsing of a requirements.txt

Describe the solution you'd like

I would like to see pip-compile somehow directly integrate with setuptools.setup's install_requires.

The main benefit is enabling a new workflow: stay close to a package's setup.py (and not adding an extra indirection: the inclusion + parsing of a requirements.txt file).

One possible solution is enabling pip-compile to be input a requirements.in with a flag (e.g. --to-setup path/to/setup.py) that, instead of creating a requirements.txt will update the install_requires inside of a setup.py (or alternately a pyproject.toml, for future users).

Alternative Solutions

I have read a bunch of issues here, and I believe this request hasn't been made before.

Additional context

n/a