Re: [PATCH] scripts/sphinx-pre-install: add '-p python3' to virtualenv

[Markus Heiser]

Am 04.03.20 um 09:31 schrieb Mauro Carvalho Chehab:
> Em Wed, 4 Mar 2020 07:20:48 +0100
> Markus Heiser <markus.heiser@xxxxxxxxxxx> escreveu:
> > With py3 the recommended way to install virtual environments is::
> >
> >     python3 -m venv sphinx-env
> >
> > This (python3) is what worked for me on RHEL/CentOS (dnf),
> > archlinux and debian/ubuntu (tested from 16.04 up to 20.04).
>
> Hmm... from:
>
> 	https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/
>
> This works since Python version 3.3. It sounds doable to use it.
>
> Yet, if we'll be switching to this method, the script should check if
> the version is 3.3 or newer. The logic inside get_sphinx_fname() would
> also require some changes, as it won't need to install anymore the
> virtualenv program for Python >= 3.3.

I guess you can ignore 3.2 and downwards

  https://en.wikipedia.org/wiki/History_of_Python#Table_of_versions

Support for py2.7 and >=py3.3 should match nearly all use cases / distributions 
we support.

BTW: starting scripts with:

-m <module-name>
    Searches sys.path for the named module and runs the
    corresponding .py file as a script.

is mostly more robust.  The option exists also in py2.  From py3.3 on
a subset of virtualenv is built-in, so you can run '-m venv' ot of the
box.

  -- Markus --