[BUG] `pip list` duplicate package entries

[AmeyaVS]

setuptools version

67.6.1

Python version

Python 3.11.2

OS

Fedora 37

Additional environment information

No response

Description

Have reported same issue in pip package: pypa/pip#11937.

While trying out example from scikit-build examples:
hello-cpp

Duplicate entries of the C++ extension is displayed when installing package through setup.py.

Expected behavior

Only a single instance of the C++ extension package should be listed.

How to Reproduce

1. Get following source: hello-cpp
2. Using python setup.py:
   2.1. Build C++ Extension Package:

   $  python setup.py build

   2.2. Install package in venv:

   $ python setup.py install

Output

List packages:

$ pip list
Package      Version
------------ -------
distro       1.8.0
hello-cpp    1.2.3
hello-cpp    1.2.3
hello-cpp    1.2.3
packaging    23.0
pip          23.0.1
scikit-build 0.16.7
setuptools   67.6.1
wheel        0.40.0

[abravalheri]

Hi @AmeyaVS , please be aware that, while setup.py is a perfectly valid configuration file, executing it directly as a Python script is deprecated. Please use the equivalent pip/python -m build commands instead. See https://blog.ganssle.io/articles/2021/10/setup-py-deprecated.html for a reference.

I can see in the related issue that using pip directly is not subject to the effect you consider undesirable.

With that in mind, I think we can close this issue (if the users are executing the recommended tools, they will not see this behaviour -- moreover pip list is not a command implemented by setuptools itself, so we don't have visibility on how it is implemented or how the observed behaviour is triggered).

[AmeyaVS]

Thank you, for the update.
Another reason I raised the issue was to try and build the C++ Extension in debug mode.
While trying to get it to build under pip seems to be only supported in release mode and could not get it to build in debug mode.

I will close this ticket for now.