Tox cannot install package dependencies for local package added with pdm

[Stubatiger]

Hello,

im currently managing my python project with pdm and use it to add dependencies with pdm add.
I can add a local package ./vendor/local.whl with pdm add ./vendor/local.whl as described at https://pdm-project.org/en/stable/usage/dependency/#local-dependencies.
As i use hatchling as a build backend a dependency entry like sub-package @ {root:uri}/sub-package will be added to the pyproject.toml using its mechanism of https://hatch.pypa.io/1.9/config/context/#paths

But if i try to run my tests with tox it crashes when installing package dependencies because it executes pip with that direct value

py312: install_package_deps> python -I -m pip install 'sub-package @ {root:uri}/sub-package' '
ERROR: Invalid requirement: 'sub-package@ {root:uri}/vendor/sub-package-0.1.0-py3-none-any.whl'
Hint: It looks like a path. File 'sub-package@ {root:uri}/vendor/sub-package-0.1.0-py3-none-any.whl' does not exist.

In the wheel tox builds (the one inside the .pkg env) the METADATA file contains a Requires-Dist line with the correct absolute path of the package like

# In .tox/.pkg/dist/mypackag-0.1.0-py3-none-any.whl/mypackage-0.1.0.dist-info/METADATA
Requires-Dist: sub-package @ file:///home/project/vendor/sub-package

I always thought that tox uses the package dependencies of the built wheel and not taking the dependency list directly from the pyproject.toml file.

In the documentation i can only find that the install_command uses a {packages} variable but where is that variable set?

[jugmac00]

Thanks for reporting the issue.

Could you come up with a minimal reproducer? Could you then also paste the full output of tox -rvv?

If you want to look yourself, a good starter could be https://github.com/tox-dev/tox/blob/main/src/tox/tox_env/python/pip/pip_install.py