Poetry: Poetry 1.1.0a2 PackageInfoError

[aviramha]

• [x] I am on the latest Poetry version.

• [x] I have searched the issues of this repo and believe that this is not a duplicate.

• OS version and name: Python 3.7 docker image

• Poetry version: 1.1.0a2

when running poetry install (with dependency of orjson):

Skipping virtualenv creation, as specified in config file.
Updating dependencies
Resolving dependencies...
  PackageInfoError
  Unable to determine package info for path: /tmp/tmpje1crk60/orjson-2.6.5
  at ~/.poetry/lib/poetry/inspection/info.py:406 in from_directory
      402│             return cls.from_package(project_package)
      403│ 
      404│         if not setup_py.exists():
      405│             # this means we cannot do anything else here
    → 406│             raise PackageInfoError(path)
      407│ 
      408│         current_dir = os.getcwd()
      409│ 
      410│         info = cls.from_metadata(path)

[abn]

The root cause for this issue is that we falback to using sdist when determining package information as the repository contains an sdisturl and no universal wheel.

https://github.com/python-poetry/poetry/blob/687a897e85ce1668ffee746bf050cc9f0bdf0fb1/poetry/repositories/pypi_repository.py#L407-L411

The package in question orjson using PEP 517 (maturin). We seem to be failing too fast - prior to parsing metadata from sdist.

https://github.com/python-poetry/poetry/blob/687a897e85ce1668ffee746bf050cc9f0bdf0fb1/poetry/inspection/info.py#L404-L417

We should only fail if metadata parsing returns None and setup.py does not exist. Additionally, support of PEP 517 builds in the inspection process will further improve this.

[aviramha]

@sdispater @abn Will this be available in alpha release soon? I wish to test it :)

[abn]

@aviramha this should be included in the 1.1.0a3 release.