[arch-general] python-cmake?

Chris Billington chrisjbillington at gmail.com
Thu Nov 28 19:01:54 UTC 2019

Though in this case OP is in a venv, so that's fine, it's only at the
system level where it's a bad idea.

Having said that, I do use pip outside of venvs a little bit, it can be
done somewhat safely, but you have to know what you're doing, such as
installing everything to /usr/local so it doesn't collide with
pacman-managed files and can be just deleted if you run into any issues:

$ cat /usr/lib/python3.8/site-packages/sitecustomize.py
import site
from sys import version_info as v
# Add /usr/local/lib/pythonx.y/site-packages as a site dir:

$ sudo cat /root/.config/pip/pip.conf

Main remaining issue is that unmet dependencies pulled in by pip might be
unnecessary if they are available in the Arch repos or AUR - though since
/usr/local/lib/pythonx.y/site-packages is added at the end of sys.path,
those packages won't shadow /usr/lib/pythonx.y/site-packages - they will
just be redundant and at worst break the pip-installed packages who
expected a different version and get the pacman-managed one instead.


On Thu, Nov 28, 2019 at 1:50 PM Dmitry Yershov via arch-general <
arch-general at archlinux.org> wrote:

> For those who don't know, command
> $ sudo pip install <pypi_package_name>
> opens DOOM's gate. [
> https://open.spotify.com/track/2UKgx2oba7CltHLACr3xdT?si=1XKkDJXZTDK2N-M-W-8hQA
> ]
> It's not a good idea to do that if you don't want to destroy your package
> integrity.
> On Thu, Nov 28, 2019 at 1:32 PM Iyán Méndez Veiga <me at iyanmv.com> wrote:
> > El jueves, 28 de noviembre de 2019 17:26:28 (CET) usted escribió:
> > > In such cases I just use pip to install package at system level
> (without
> > > venv). If something gets packaged later I just do pip uninstall and
> > install
> > > arch package instead.
> > >
> > >Regards,
> > >Łukasz
> >
> > If you do that, pip will overwrite /usr/bin/cmake, right? Besides, I
> don't
> > want just to install it in my system, but write a PKGBUILD and probably
> > share
> > it in AUR.
> >
> > Thanks,
> > Iyán
> >

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