Invalid package METADATA?

• 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: Ubuntu 18.04.5 LTS (Bionic Beaver)

• Poetry version: 1.1.1

• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/sam-willis/dd4a81fa2f1e608ac05441ed2fb6bb1a

Issue

If you install a package with a path dependency like: test_path_dep = {path = "test_path"}

When you install the package, In your dist-info METADATA, you end up with the path dependant package listed like: Requires-Dist: test_path_dep @ test_path

It looks to me according to https://www.python.org/dev/peps/pep-0508/ the @ symbol is used for URLS only, and that this isn’t valid.

This causes the pkg_resources module’s Distribution’s class requires method to fail with: pkg_resources.extern.packaging.requirements.InvalidRequirement: Invalid URL: test_path

[johnpaulett]

It seems any kind of URL or even just the distribution name without the @ is enough for pkg_resources to be happy when trying to list the dependencies of a distribution. So I’d say Poetry should write either name @ file://relative/path, name @ file:///absolute/path or just name. I guess the only use case that this choice affects is installation. I’m not sure which would be better, but if file URL with relative path works when installing the wheel, that looks to me the best thing to do.

I’d lean towards just name.

name @ file:///absolute/path requires the directory structure for the host that the .whl is installed into to match the structure of the build system.

Both the absolute and relative paths, I believe, would incorrect if those dependencies are .whl’s themselves – the file would be at file://relative/path/dist/*.whl or file:///absolute/path/dist/*.whl.

[nathanrpage97]

I have another workaround. Also not sure if this is defined behavior.

Pyproject.toml

[tool.poetry.dependencies]
...
mylib = "1.1.0"

[tool.poetry.dev-dependencies]
...
mylib = { path = "mylib-1.1.0-py3-none-any.whl", develop = false }

This has the added benefit of ensuring it is the correct version installed on a user machine. If you aren’t using a wheel or don’t care about a version then you can switch to mylib = "*".