maturin fails if [project] is specified in pyproject.toml

[droundy]

Bug Description

When I include

[project]

in my pyproject.toml, maturin fails with

💥 maturin failed
  Caused by: pyproject.toml is invalid
  Caused by: pyproject.toml is not PEP 517 compliant: missing field `name` at line 9 column 1

This is confusing, because the Readme.md states that this is how to specify dependencies of the python code.

Your Python version (python -V)

Python 3.9.2

Your pip version (pip -V)

pip 20.3.4 from /usr/lib/python3/dist-packages/pip (python 3.9)

What bindings you're using

cffi

Does cargo build work?

• Yes, it works

If on windows, have you checked that you aren't accidentally using unix path (those with the forward slash /)?

• Yes

Steps to Reproduce

git clone https://github.com/droundy/latex_snippet
cd latex_snippet/
maturin build -b cffi # confirm that it builds without this
echo [project] >> pyproject.toml
maturin build -b cffi

[droundy]

I'll mention that perhaps the bug is in the documentation. I have no knowledge of what the proper format of pyproject.toml is, I'm just trying to address the deprecation warning that says I should specify a cffi dependency.

[messense]

PEP 621 requires name to be statically defined in pyproject.toml if package field appears: https://www.python.org/dev/peps/pep-0621/#name