Fwd: [Distutils] [setuptools] Install entry point only if extras_require are satisfied?

[Sumana Harihareswara]

Forwarding/cross-posting in case any of you can help.


-------- Forwarded Message --------
Subject: [Distutils] [setuptools] Install entry point only if
extras_require are satisfied?
Date: Sat, 29 Feb 2020 08:00:05 +0100
From: Jonatan Palsson <jona...@gmail.com>
To: distut...@python.org

Hi,

I'm modifying a python project which uses setuptools for installation.
The project installs an entry point as such:

setup_args["entry_points"] = { "console_scripts": ["w1thermsensor
= w1thermsensor.cli:cli [CLI]"] }

where [CLI] is a reference to an extra_requires entry. This entry
looks like this:

extras_require=dict(CLI="click>=7.0")

With these two lines, the current behavior is that the w1thermsensor
entry point is *always* installed when "setup.py install" is invoked,
but the entry point will cause an error if its dependencies are not
available.

I would like to change the behavior, so that the entry point is *not
installed* if the extra dependencies are not available (and perhaps
also show a warning, indicating that this entry point has not been
installed).

How can I do this?

Cheers,
Jonatan
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