Cannot install `bleach`-package via git (detects vendorized package rather than main package)

• 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: macOS 12.0
• Poetry version: 1.2.0a2 and 1.1.12
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/malthejorgensen/7236fc1ac252dc51dd0e86cc404b2dec

Issue

When installing the bleach-package (Github, PyPI) via git, Poetry identifies the package as having the name html5lib rather than the intended name bleach. This is as of bleach v4.1.0.

For example, if you do:

poetry init
poetry add -vvv 'git+https://github.com/mozilla/bleach.git#main'

You get a pyproject.toml with the following [tool.poetry.dependencies]-section (see also Gist linked above):

[tool.poetry.dependencies]
python = "^3.10"
html5lib = {git = "https://github.com/mozilla/bleach.git", rev = "main"}

here we see bleach incorrectly listed as html5lib.

If you try and change html5lib to bleach in pyproject.toml you get the following error:

The dependency name for bleach does not match the actual package's name: html5lib

All of this happens because the repository contains a vendored html5lib including the directory bleach/_vendor/html5lib-1.1dist-info. This directory is the first thing Poetry's src/poetry/inspection/info.py::from_metadata() (link) finds and thus it's used as the source of truth for information about the package (package name being part of that).

It's not clear to me that Poetry can solve this, since the way the package is vendored is a bit weird and AFAICT Poetry can only rely on heuristics for detecting package contents.

Anyhow, I ran into this issue and I thought I would post it here, if anyone else runs into something similar.

Reproduce the issue with poetry add -vvv 'git+https://github.com/mozilla/bleach.git#main' using the linked project configuration. Start in src/poetry/inspection/info.py, especially from_metadata() around the referenced lines, and investigate how the vendored html5lib-1.1dist-info is selected. Done means the git dependency is identified as bleach rather than html5lib.