Cannot install pyproject.toml packages as path dependencies

[CLOVIS-AI]

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: ArchLinux
• Poetry version: 1.1.13

Issue

A Rust extension managed by Maturin has a pyproject.toml file with build-system.requires properly set to compile and package the Rust code.

Installing such a package is as simple as pip install <path-to-package>.

When added as a path dependency in a Poetry project: project = { path = "../project", develop = false }, poetry update fails with:
Directory /home/[REDACTED]/project does not seem to be a Python package

poetry/core/packages/directory_dependency.py:53 accepts dependencies that are either a Poetry pyproject.toml, or have a setup.py file. pyproject.toml is a standard Python packaging file, and Poetry should accept installing a non-Poetry project that uses this format.

[dimbleby]

duplicate #5655, apparently fixed by python-poetry/poetry-core#368

I've lost track of what's in the latest beta, you may need to wait for the next release to verify.

[finswimmer]

Duplicate of #5655

[CLOVIS-AI]

Do you have an estimate of when that will be?

[Telofy]

In case someone finds this searching for “does not seem to be a Python package”: The pyproject.toml of the dependency has to have a build-system section to be considered valid. E.g.:

[build-system]
requires = ["setuptools", "wheel"]

I'm guessing this is about to be fixed in the next release through this commit.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.