provides_extra .none ...?

[wimglenn]

The metadata generated by flit build advertises my distribution as providing an extra called .none:

provides_extras: ['.none', 'doc', 'test']

Was that intended to be publicly available, or is it a bug? Reading the source, it looks as though this was just supposed to be an an internal token, not actually making it into the final package. I would rather flit not create the .none extra in project metadata.

[takluyver]

You're right, that's meant to be an internal token, it shouldn't be visible in the resulting packages.

[wimglenn]

Here is a minimal setup to recreate the issue. flit==1.2.1

In pyproject.toml:

[build-system]
requires = ["flit"]
build-backend = "flit.buildapi"

[tool.flit.metadata]
module = "example"
author = "wim"
author-email = "wim@example.org"
home-page = "https://www.example.org"
requires = ["wimpy"]

In example.py:

"""my proj"""
__version__ = "0.1"

If commenting out the line requires = ["wimpy"] in markup, then the .none extra is not created.