pyproject.toml represents the new era of Python packaging, but many old projects are still using setuptools. That's where this package comes in: just install it, run it, and it will print out a nicely formatted pyproject.toml file with the same metadata that you had in setup.py or setup.cfg.

Or at least, that's the goal. The project is currently a work in progress with only partial support for all the attributes that might exist in a setuptools configuration, so this won't yet work for anything complex. Feel free to file an issue to highlight anything that needs to be added!

There are two different ways to install this project. You can use either or both depending on what you prefer.

To install setuptools-pyproject-migration as an application, we recommend using pipx (though of course you can also do this with pip install --user or in a virtual environment of your choice). First make sure you have pipx installed, then run

pipx install setuptools-pyproject-migration

After that, in any directory that has a setup.py and/or setup.cfg file, you can run

setuptools-pyproject-migration

and it will print out the content of pyproject.toml as computed from your setup.py and/or setup.cfg. Running setuptools-pyproject-migration -h will print a brief usage summary.

You can also install and run the application in one go as follows:

pipx run setuptools-pyproject-migration

Or you can use setuptools-pyproject-migration in a virtual environment you use to develop your project. Activate your virtual environment and then run

python -m pip install setuptools-pyproject-migration

and then running

python setup.py pyproject

will print out the content of your pyproject.toml file.

Inspired by a conversation on Mastodon.