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Re: The python command in Debian

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Hi,

čt 9. 7. 2020 v 15:27 odesílatel Matthias Klose <doko@debian.org> napsal:

> Describing here a solution which is implemented for Ubuntu focal (20.04
> LTS).  A
> new source package what-is-python (-perl-dont-hurt-me) ships binary
> packages
> python-is-python2, python-dev-is-python2, python-is-python3 and
> python-dev-is-python3.  The python-is-python2 package provides the python
> package, such that packages that still depend on python are not removed on
> a
> distro upgrade.  On new installs, python-is-python3 is not installed by
> default,
> but the user gets a hint from command-not-found to install the package if
> he
> tries to run python.  Package dependencies on the new four binary packages
> have
> to be disallowed in the Python policy.  Note that such a package including
> the
> Provides should only be uploaded once all dependencies on the unversioned
> python
> packages are gone.
>

I like this solution in Ubuntu and I have:
onovy@jupiter:~$ dpkg -l | grep python-is-python3
ii  python-is-python3                          3.8.2-4
          all          symlinks /usr/bin/python to python3

What I think is good idea:
* keep "python" command pointing to python2.7 if I'm upgrading
buster->bullseye with python2.7 installed. We are going to keep python2.7
interpreter for bullseye, so don't break old "python" command for
third-parties apps/scripts/etc. (install python-is-python2 during
buster->bullseye upgrade)
* allow users to choose if they want python=python3 (apt install
python-is-python3)
* (maybe?) python=python3 in new installs, because why not? (install
python-is-python3 by default in clean install)

-- 
Best regards
 Ondřej Nový

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The python command in Debian Matthias Klose <doko@debian.org> - 2020-07-09 15:30 +0200
  Re: The python command in Debian Jeremy Stanley <fungi@yuggoth.org> - 2020-07-09 19:00 +0200
    Re: The python command in Debian paultag@debian.org - 2020-07-09 19:50 +0200
  Re: The python command in Debian Ondrej Novy <novy@ondrej.org> - 2020-07-09 21:50 +0200
    Re: The python command in Debian Fabrice BAUZAC-STEHLY <noon@mykolab.com> - 2020-07-13 18:30 +0200
      Re: The python command in Debian Matthias Klose <doko@debian.org> - 2020-07-13 19:30 +0200
        Re: The python command in Debian Ondrej Novy <novy@ondrej.org> - 2020-07-14 11:00 +0200
          Re: The python command in Debian Piotr Ożarowski <piotr@debian.org> - 2020-07-14 11:20 +0200
            Re: The python command in Debian Rene Engelhard <rene.engelhard@mailbox.org> - 2020-07-18 08:50 +0200
              Re: The python command in Debian Sebastian Humenda <shumenda@gmx.de> - 2020-07-18 10:30 +0200
                Re: The python command in Debian debacle@debian.org - 2020-07-18 10:40 +0200
                Re: The python command in Debian Dmitry Shachnev <mitya57@debian.org> - 2020-07-18 11:30 +0200
  Re: The python command in Debian Sandro Tosi <morph@debian.org> - 2020-07-16 18:10 +0200
  Re: The python command in Debian "Nicolas Dandrimont" <olasd@debian.org> - 2020-09-17 15:20 +0200
    Re: The python command in Debian Matthias Klose <doko@debian.org> - 2020-09-17 15:40 +0200
  Re: The python command in Debian Matthias Klose <doko@debian.org> - 2021-03-02 10:50 +0100

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