bug#69997: Should ‘guix import pypi’ get dependencies from pyproject files?

["Ludovic Courtès" <ludovic.courtes@inria.fr>]

Hello Python team!

Should ‘guix import pypi’ attempt to get dependency information from
‘pyproject.toml’, in addition to ‘requirements.txt’ and wheel ‘METADATA’
as it already does?

It might be more complicated than we’d like: in some cases, that file
seems to be used as a “trampoline” to Poetry.  For instance, in
python-pypugjs, the ‘requires’ bit delegates everything to Poetry:

--8<---------------cut here---------------start------------->8---
[tool.poetry]
name = "pypugjs"
version = "5.9.4"
description = ""
authors = ["Andy Grabow <andy@freilandkiwis.de>"]
license = "MIT"

[tool.poetry.dependencies]
python = "^3.8"
Jinja2 = "^3.1.1"
Mako = "^1.1.3"
tornado = "^6.0.4"
six = "^1.15.0"
coverage = "^6.3.2"
nose = "^1.3.7"
Flask = "^2.1.1"
charset-normalizer = "^2.1.0"
flake8 = "^4.0.1"

[tool.poetry.dev-dependencies]

[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"
--8<---------------cut here---------------end--------------->8---

Thoughts?

Ludo’.