pip freeze in a conda environment produces unusable requirements.txt

[christierney]

For a conda client, pip freeze seems to generate a requirements.txt with local file references.

see https://rstudioide.zendesk.com/agent/tickets/55886

pip list --format=freeze > requirements.txt seems to do the right thing.

see also pypa/pip#7612

[mmarchetti]

pip list --format=freeze helps a lot. There are sometimes package versions in conda environments that don't exist for pip, e.g. we saw setuptools=49.6.0.post which is not available on PyPI.

[ekungurov]

Also do we have any documentation on how to use conda_mode=True ?