Transitive dependencies via optional dependency aliases fails URL installation

[ringohoffman]

Continuing my report from the comment here:

• Private dependency in pyproject.toml does not resolve #1932 (comment)

I am still seeing a failure to install transitive URL dependencies when using optional dependency aliases as in:

[project]
name = "transitive_optional_dependency"
dynamic = ["version"]

[project.optional-dependencies]
all = [
    "transitive_optional_dependency[docs]",
]
docs = [
    "mike @ git+https://github.com/jimporter/mike@3f7d756#egg=mike",
]

I've provided a minimally reproducible repo here: https://github.com/ringohoffman/transitive-optional-dependency

With steps:

$ git clone git@github.com:ringohoffman/transitive-optional-dependency.git
$ cd transitive-optional-dependency
$ conda create -n tod python=3.10 -y
$ conda activate tod
$ pip install uv
Collecting uv
  Using cached uv-0.2.9-py3-none-macosx_11_0_arm64.whl.metadata (33 kB)
Using cached uv-0.2.9-py3-none-macosx_11_0_arm64.whl (9.7 MB)
Installing collected packages: uv
Successfully installed uv-0.2.9
$ uv pip install -e .[all]
error: Package `mike` attempted to resolve via URL: git+https://github.com/jimporter/mike@3f7d756#egg=mike. URL dependencies must be expressed as direct requirements or constraints. Consider adding `mike @ git+https://github.com/jimporter/mike@3f7d756#egg=mike` to your dependencies or constraints file.

cc: @charliermarsh

[charliermarsh]

Ah in a recursive extra? Maybe we're missing that case, thanks.