Connect not installing python github packages

[isabelizimm]

When using vetiver alongside rsconnect-python, things seem to break when trying to use a github version of a package that includes functions not available in previous versions. In particular, Connect will only install PyPI versions of packages, even if that is not what is in someone's environment.
It gives some cryptic errors. The only way to resolve this is to do a vetiver release with the new or updated feature.

[isabelizimm]

It looks like when rsconnect-python creates a requirements.txt, it does so with pip list --format=freeze

https://github.com/rstudio/rsconnect-python/blob/f595f69d0f943949bcc77f9f25710791ddadd454/rsconnect/environment.py#L221

so a GitHub installation will be saved as vetiver==0.1.7.post41+g60e590a, which ca. Using pip freeze instead will save the requirements to something similar to vetiver @ git+https://github.com/rstudio/vetiver-python@60e590abae1ce688f3458f30bafc453256920984, which should allow a GH installation of a package

[isabelizimm]

From what I am seeing on my local Connect, a requirements.txt is generated every time, which will overwrite any file I am passing with the name requirements.txt.

This is not related to the pip list vs. pip freeze discussion above, but is relevant since this is blocking users from supplying their own requirements (ie, passing in github installs)

[isabelizimm]

closed by #300 Thank you @bcwu for all your help! 💯