Re: Making setup.py run external command to build

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On 2021-03-25 19:07:50 +0000 (+0000), Julian Smith wrote:
[...]
> I've come across a problem where an old pip-18.1 fails to install from
> an sdist or wheel, with error:
>=20
>       ERROR: You must give at least one requirement to install (see "pip =
help install")
>=20
> pip-20.2.1 and pip-21.0.1 work fine, including installing from an sdist
> on test.py.pi.
>=20
> Should i be worried about this? I'd like my package to install on
> anyone's machine, regardless of their pip version. But maybe users are
> expected to always run a recent pip version? After all it's easy enough
> to upgrade it.

According to https://pip.pypa.io/en/stable/news/#id448 support for
pyproject.toml files was first added in pip 19.0 (just over two
years ago). If you have users who rely on distribution-packaged pip
then this may not be old enough for them to have it yet. For example
the current Debian stable release provides pip 18.1, and the
next-most-recent Ubuntu LTS (18.04) provides 9.0.1.
--=20
Jeremy Stanley

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