session.install("foo") doesn't honor [[tool.poetry.source]]

[kentmartin73]

Hi,

We're using internal PyPi repos, and, when using session.install("foo"), the repos defined in [[tool.poetry.source]] are ignored.

Short of reading pyproject.toml and constructing/writing a pip.conf before doing any session.installs, is there another obvious way forward? If not, would this fit better into nox-poetry itself?

[kentmartin73]

On further thought, when authentication to the repo is needed, even constructing a pip.conf wouldn't do it completely as Poetry has a multitude of credentials back ends

[cjolowicz]

This has come up before, see #397 and #398.

Can you configure your CI to provide PIP_INDEX_URL and credentials?

I'd also be happy to accept a PR that preserves the exported index URL from Poetry.

[cjolowicz]

Duplicate of #398