Replace special chars with underscores for environment variables with credentials

• I am on the latest stable Poetry version, installed using a recommended method.

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

• I have searched the FAQ and general documentation and believe that my question is not already covered.

• Poetry version: >=1.0.0

• Python version: 3

• OS version and name: N/A

• pyproject.toml: bryant-finney/pyproject.toml

Request for Enhancement

Currently, I am unable to use environment variables to authenticate for installing packages from a private internal PyPI repository example.com.

In the linked pyproject.toml, the source repository named example.com provides a private package named the-package:

# ...

[[tool.poetry.source]]
name = "example.com"
url = "https://example.com/pypi/simple"
default = false
secondary = false

# ...

From my development machine, I can authenticate with the example.com repository and install the-package:

❯ poetry config http-basic.example.com $EXAMPLE_USER $EXAMPLE_PASSWORD

❯ poetry add --group dev the-package
Using version ^1.2.3 for the-package

Updating dependencies
Resolving dependencies... (6.7s)

Writing lock file

Package operations: 8 installs, 0 updates, 0 removals

  • Installing click-didyoumean (0.3.0)
  • Installing click-plugins (1.1.1)
  • Installing click-repl (0.2.0)
[ ... ]

I also expected to use the environment variables POETRY_HTTP_BASIC_EXAMPLE_COM_USERNAME and POETRY_HTTP_BASIC_EXAMPLE_COM_PASSWORD for installations during Docker image builds.

However, this does not work: poetry.config.config:230 only replaces -s with _s, so it does not match these variables.

This request is to support other special characters in the repo name (e.g. . in example.com) instead of only -s.

Start in src/poetry/config/config.py around line 230, where environment-variable names currently normalize hyphens. Reproduce the example.com repository configuration with POETRY_HTTP_BASIC_EXAMPLE_COM_USERNAME and POETRY_HTTP_BASIC_EXAMPLE_COM_PASSWORD; done means credentials using repository names with special characters are recognized during installation.