Global configuration of custom sources

• I have searched the issues of this repo and believe that this is not a duplicate.
• I have searched the documentation and believe that my question is not covered.

Feature Request

I am using private repositories to download dependencies as I am working behind a corporate firewall. According to the docs (https://python-poetry.org/docs/repositories/#install-dependencies-from-a-private-repository), I am supposed to put a private repo into pyproject.toml.

# pyproject.toml
[[tool.poetry.source]]
name = "foo"
url = "https://foo.bar/simple/"
default = true

If I do that, I am basically not able to commit pyproject.toml to GitHub as I don't want to reveal internal server names. Committing these information would be useless for others anyway, as they are not able to access our internal repos.

I am wondering if it would make sense to define private repos in poetry's own configuration on my local machine? Or maybe I can set some environment variables?

Start by reading the private repository documentation linked in the issue and reviewing how Poetry currently reads sources from pyproject.toml and local configuration. The work is complete when private source details can be configured locally or through the proposed environment-variable approach without requiring them in a committed pyproject.toml.