setuptools version

68.2.0

Python version

3.11.5

OS

Manjaro ARM Linux 23.02

Additional environment information

No special condition I would be aware of. I call pyproject-build and it happens, but it was already happening when I call directly ./setup.py.

Description

When I call pyproject-build --sdist in my project https://github.com/rdiff-backup/rdiff-backup, setuptools spits a warning:

warning: sdist: standard file not found: should have one of README, README.rst, README.txt, README.md

even though I have defined the readme key in my pyproject.toml:

readme = {file = "pyproject.readme.md", content-type = "text/markdown"}

Expected behavior

I expect the readme to be covered by the readme key, and not need to have a specific name, which can collide with the actual (wrong format, and too long for Python) README.adoc. With collide, I mean that GitHub would prefer to render it over our actual readme, but also that it would be confusing to have 2 readmes.

How to Reproduce

1. clone https://github.com/rdiff-backup/rdiff-backup.git
2. you'll need asciidoctor
3. call pyproject-build --sdist or ./setup.py sdist

Output

warning: sdist: standard file not found: should have one of README, README.rst, README.txt, README.md