Re: Debian part of a version number when epoch is bumped

From	Michael Stone <mstone@debian.org>
Newsgroups	linux.debian.devel
Subject	Re: Debian part of a version number when epoch is bumped
Date	2018-02-14 22:30 +0100
Message-ID	<vjcMP-1Lv-61@gated-at.bofh.it> (permalink)
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On Wed, Feb 14, 2018 at 12:54:05PM -0800, Russ Allbery wrote:
>Since there are two goals, a more correct implementation would be to split
>these into two versions.  The simplest would be to have an integer
>"version epoch" field in the package metadata separate from the version
>number.  So instead of:
>
>Version: 1.8-1
>
>Version: 1:1.6-1
>
>you'd have:
>
>Version: 1.8-1
>
>Version: 1.6-1
>Epoch: 1
>
>We then could implement the separate semantics: only the version field
>would be used for interpackage dependencies, so 1.6-1 with epoch 1 would
>not satisfy >= 1.8 dependencies, but DAK and apt clients would know that
>any package with epoch 1 supersedes packages with no epoch for archive and
>default installation purposes.
>
>Of course, getting to that from where we are now may be substantially more
>trouble than it's worth, and it would necessarily be a very slow rollout
>process (and there are still issues with unique filenames).

I don't think you'd need to change the package metadata for this, just 
change the comparison rules. I'm not entirely sure what the semantics 
should be, though--a simple depends >= is easy, but what about conflicts 
and breaks with <<? I agree that it's probably more trouble than it's 
worth. 

Another way to think of it is that the epoch should really be evaluated 
as part of the package name rather than the version string--it's 
basically a mechanism to avoid renaming a package for purely aesthetic 
reasons.

Mike Stone

Thread

Debian part of a version number when epoch is bumped Jeremy Bicha <jbicha@debian.org> - 2018-02-05 16:50 +0100
  Re: Debian part of a version number when epoch is bumped Matt Zagrabelny <mzagrabe@d.umn.edu> - 2018-02-05 17:00 +0100
  Re: Debian part of a version number when epoch is bumped Mattia Rizzolo <mattia@debian.org> - 2018-02-05 17:10 +0100
    Re: Debian part of a version number when epoch is bumped Colin Watson <cjwatson@debian.org> - 2018-02-06 09:40 +0100
      Re: Debian part of a version number when epoch is bumped Mattia Rizzolo <mattia@debian.org> - 2018-02-06 14:30 +0100
        Re: Debian part of a version number when epoch is bumped Colin Watson <cjwatson@debian.org> - 2018-02-06 23:30 +0100
          Re: Debian part of a version number when epoch is bumped Michael Stone <mstone@debian.org> - 2018-02-07 13:20 +0100
          Re: Debian part of a version number when epoch is bumped Jonathan McDowell <noodles@earth.li> - 2018-02-07 11:10 +0100
            Re: Debian part of a version number when epoch is bumped Wouter Verhelst <wouter@debian.org> - 2018-02-07 18:00 +0100
          Re: Debian part of a version number when epoch is bumped Seth Arnold <seth.arnold@canonical.com> - 2018-02-08 00:50 +0100
            Re: Debian part of a version number when epoch is bumped Ian Jackson <ijackson@chiark.greenend.org.uk> - 2018-02-09 13:10 +0100
              Re: Debian part of a version number when epoch is bumped Philipp Kern <pkern@debian.org> - 2018-02-09 13:50 +0100
                Re: Debian part of a version number when epoch is bumped Ian Jackson <ijackson@chiark.greenend.org.uk> - 2018-02-09 17:10 +0100
                Re: Debian part of a version number when epoch is bumped Colin Watson <cjwatson@debian.org> - 2018-02-09 18:20 +0100
                Re: Debian part of a version number when epoch is bumped Philipp Kern <pkern@debian.org> - 2018-02-09 18:20 +0100
                Re: Debian part of a version number when epoch is bumped Russ Allbery <rra@debian.org> - 2018-02-09 18:30 +0100
                Re: Debian part of a version number when epoch is bumped Philipp Kern <pkern@debian.org> - 2018-02-09 19:00 +0100
                Re: Debian part of a version number when epoch is bumped Russ Allbery <rra@debian.org> - 2018-02-09 19:20 +0100
                Re: Debian part of a version number when epoch is bumped Andrey Rahmatullin <wrar@debian.org> - 2018-02-09 20:30 +0100
                Re: Debian part of a version number when epoch is bumped Jeremy Bicha <jbicha@debian.org> - 2018-02-09 20:40 +0100
                Re: Debian part of a version number when epoch is bumped Guillem Jover <guillem@debian.org> - 2018-02-12 03:30 +0100
                Re: Debian part of a version number when epoch is bumped Wouter Verhelst <wouter@debian.org> - 2018-02-14 13:00 +0100
                Re: Debian part of a version number when epoch is bumped Vincent Bernat <bernat@debian.org> - 2018-02-14 14:00 +0100
                Re: Debian part of a version number when epoch is bumped Jeremy Bicha <jbicha@ubuntu.com> - 2018-02-14 14:50 +0100
                Re: Debian part of a version number when epoch is bumped Michael Biebl <biebl@debian.org> - 2018-02-14 16:40 +0100
                Re: Debian part of a version number when epoch is bumped Henrique de Moraes Holschuh <hmh@debian.org> - 2018-02-14 15:00 +0100
                Re: Debian part of a version number when epoch is bumped Lars Wirzenius <liw@liw.fi> - 2018-02-14 15:20 +0100
                Re: Debian part of a version number when epoch is bumped Vincent Bernat <bernat@debian.org> - 2018-02-14 19:00 +0100
                Re: Debian part of a version number when epoch is bumped Lars Wirzenius <liw@liw.fi> - 2018-02-14 20:30 +0100
                Re: Debian part of a version number when epoch is bumped Vincent Bernat <bernat@debian.org> - 2018-02-14 21:10 +0100
                Re: Debian part of a version number when epoch is bumped Michael Stone <mstone@debian.org> - 2018-02-14 21:20 +0100
                Re: Debian part of a version number when epoch is bumped Vincent Bernat <bernat@debian.org> - 2018-02-14 21:30 +0100
                Re: Debian part of a version number when epoch is bumped Michael Stone <mstone@debian.org> - 2018-02-14 21:40 +0100
                Re: Debian part of a version number when epoch is bumped Russ Allbery <rra@debian.org> - 2018-02-14 22:00 +0100
                Re: Debian part of a version number when epoch is bumped Michael Stone <mstone@debian.org> - 2018-02-14 22:30 +0100
                Re: Debian part of a version number when epoch is bumped Russ Allbery <rra@debian.org> - 2018-02-14 22:40 +0100
                Re: Debian part of a version number when epoch is bumped Michael Stone <mstone@debian.org> - 2018-02-14 23:10 +0100
                Re: Debian part of a version number when epoch is bumped Russ Allbery <rra@debian.org> - 2018-02-14 23:20 +0100
                Re: Debian part of a version number when epoch is bumped Michael Stone <mstone@debian.org> - 2018-02-14 23:40 +0100
                Re: Debian part of a version number when epoch is bumped Wouter Verhelst <wouter@debian.org> - 2018-02-15 11:20 +0100
                Re: Debian part of a version number when epoch is bumped Simon McVittie <smcv@debian.org> - 2018-02-15 11:50 +0100
                Re: Debian part of a version number when epoch is bumped Wouter Verhelst <wouter@debian.org> - 2018-02-15 12:30 +0100
                Re: Debian part of a version number when epoch is bumped Thibaut Paumard <thibaut@debian.org> - 2018-02-15 13:30 +0100
                Re: Debian part of a version number when epoch is bumped Vincent Ladeuil <v.ladeuil+debian@free.fr> - 2018-02-15 15:10 +0100
                Re: Debian part of a version number when epoch is bumped Guillem Jover <guillem@debian.org> - 2018-02-16 03:10 +0100
                Re: Debian part of a version number when epoch is bumped Dimitri John Ledkov <xnox@debian.org> - 2018-03-12 12:40 +0100
                Re: Debian part of a version number when epoch is bumped Cédric Boutillier <boutil@debian.org> - 2018-03-12 18:50 +0100
                Re: Debian part of a version number when epoch is bumped Simon McVittie <smcv@debian.org> - 2018-02-15 01:00 +0100
                Re: Debian part of a version number when epoch is bumped Michael Stone <mstone@debian.org> - 2018-02-14 21:50 +0100
                Re: Debian part of a version number when epoch is bumped Matt Zagrabelny <mzagrabe@d.umn.edu> - 2018-02-14 21:50 +0100
                Re: Debian part of a version number when epoch is bumped Adam Borowski <kilobyte@angband.pl> - 2018-02-15 08:50 +0100
                Re: Debian part of a version number when epoch is bumped gregor herrmann <gregoa@debian.org> - 2018-02-15 09:00 +0100
                Re: Debian part of a version number when epoch is bumped Adam Borowski <kilobyte@angband.pl> - 2018-02-15 09:30 +0100
                Re: Debian part of a version number when epoch is bumped Thibaut Paumard <thibaut@debian.org> - 2018-02-15 11:20 +0100
                Re: Debian part of a version number when epoch is bumped gregor herrmann <gregoa@debian.org> - 2018-02-15 13:10 +0100
                Re: Debian part of a version number when epoch is bumped Thibaut Paumard <thibaut@debian.org> - 2018-02-15 13:40 +0100
                Re: Debian part of a version number when epoch is bumped Vincent Bernat <bernat@debian.org> - 2018-02-15 14:20 +0100
                Re: Debian part of a version number when epoch is bumped Thibaut Paumard <thibaut@debian.org> - 2018-02-15 15:30 +0100
                Re: Debian part of a version number when epoch is bumped Michael Stone <mstone@debian.org> - 2018-02-15 14:20 +0100
                Re: Debian part of a version number when epoch is bumped Wouter Verhelst <wouter@debian.org> - 2018-02-14 15:50 +0100
                Re: Debian part of a version number when epoch is bumped Raphael Hertzog <hertzog@debian.org> - 2018-02-14 16:10 +0100
                Re: Debian part of a version number when epoch is bumped Andrey Rahmatullin <wrar@debian.org> - 2018-02-14 16:10 +0100
                Re: Debian part of a version number when epoch is bumped Michael Biebl <biebl@debian.org> - 2018-02-14 16:30 +0100
                Re: Debian part of a version number when epoch is bumped Andrey Rahmatullin <wrar@debian.org> - 2018-02-14 17:10 +0100
                Re: Debian part of a version number when epoch is bumped Marc Haber <mh+debian-devel@zugschlus.de> - 2018-02-14 18:30 +0100
                Re: Debian part of a version number when epoch is bumped Wouter Verhelst <wouter@debian.org> - 2018-02-15 11:20 +0100
                Re: Debian part of a version number when epoch is bumped Steve McIntyre <steve@einval.com> - 2018-02-14 15:10 +0100
                Re: Debian part of a version number when epoch is bumped Ian Campbell <ijc@debian.org> - 2018-02-14 15:50 +0100
                Re: Debian part of a version number when epoch is bumped Ian Jackson <ijackson@chiark.greenend.org.uk> - 2018-02-09 19:40 +0100
                Re: Debian part of a version number when epoch is bumped Guillem Jover <guillem@debian.org> - 2018-02-12 03:20 +0100
      Re: Debian part of a version number when epoch is bumped Steve McIntyre <steve@einval.com> - 2018-02-06 14:40 +0100
        Re: Debian part of a version number when epoch is bumped Mattia Rizzolo <mattia@debian.org> - 2018-02-06 15:00 +0100
    Re: Debian part of a version number when epoch is bumped Lars Wirzenius <liw@liw.fi> - 2018-02-06 14:40 +0100
      Re: Debian part of a version number when epoch is bumped Holger Levsen <holger@layer-acht.org> - 2018-02-06 15:20 +0100
      Re: Debian part of a version number when epoch is bumped Jonathan Dowland <jmtd@debian.org> - 2018-02-12 09:40 +0100
    Re: Debian part of a version number when epoch is bumped Jonathan Dowland <jmtd@debian.org> - 2018-02-06 14:40 +0100
      Re: Debian part of a version number when epoch is bumped Mattia Rizzolo <mattia@debian.org> - 2018-02-06 15:00 +0100
        Re: Debian part of a version number when epoch is bumped Chris Lamb <lamby@debian.org> - 2018-02-06 16:20 +0100
          Re: Debian part of a version number when epoch is bumped "Christian T. Steigies" <cts@debian.org> - 2018-02-07 14:00 +0100
            Re: Debian part of a version number when epoch is bumped Ian Jackson <ijackson@chiark.greenend.org.uk> - 2018-02-07 15:00 +0100
              Re: Debian part of a version number when epoch is bumped Ian Campbell <ijc@debian.org> - 2018-02-08 11:20 +0100
                Re: Debian part of a version number when epoch is bumped Raphael Hertzog <hertzog@debian.org> - 2018-02-08 12:00 +0100
                Re: Debian part of a version number when epoch is bumped Ian Campbell <ijc@debian.org> - 2018-02-09 21:00 +0100
                Re: Debian part of a version number when epoch is bumped Chris Lamb <lamby@debian.org> - 2018-02-09 23:10 +0100
            Re: Debian part of a version number when epoch is bumped Colin Watson <cjwatson@debian.org> - 2018-02-07 16:40 +0100
          Re: Debian part of a version number when epoch is bumped Raphael Hertzog <hertzog@debian.org> - 2018-02-07 11:00 +0100
            Re: Debian part of a version number when epoch is bumped Chris Lamb <lamby@debian.org> - 2018-02-07 11:50 +0100
              Re: Debian part of a version number when epoch is bumped Raphael Hertzog <hertzog@debian.org> - 2018-02-07 12:30 +0100
    Re: Debian part of a version number when epoch is bumped Jeremy Bicha <jbicha@debian.org> - 2018-03-28 22:20 +0200
      Re: Debian part of a version number when epoch is bumped Chris Lamb <lamby@debian.org> - 2018-03-29 00:00 +0200
      Re: Debian part of a version number when epoch is bumped Adam Borowski <kilobyte@angband.pl> - 2018-03-29 00:30 +0200
      Re: Debian part of a version number when epoch is bumped Mattia Rizzolo <mattia@debian.org> - 2018-03-29 01:00 +0200
      Re: Debian part of a version number when epoch is bumped "Christian T. Steigies" <cts@debian.org> - 2018-03-29 19:10 +0200
        Re: Debian part of a version number when epoch is bumped Simon McVittie <smcv@debian.org> - 2018-03-29 20:00 +0200
        Re: Debian part of a version number when epoch is bumped Adrian Bunk <bunk@debian.org> - 2018-03-30 13:30 +0200
          Re: Debian part of a version number when epoch is bumped "Christian T. Steigies" <cts@debian.org> - 2018-04-02 20:40 +0200
            Re: Debian part of a version number when epoch is bumped Adrian Bunk <bunk@debian.org> - 2018-04-02 21:10 +0200
            Re: Debian part of a version number when epoch is bumped Simon McVittie <smcv@debian.org> - 2018-04-02 21:50 +0200
              Re: Debian part of a version number when epoch is bumped The Wanderer <wanderer@fastmail.fm> - 2018-04-03 05:10 +0200
                Re: Debian part of a version number when epoch is bumped James McCoy <jamessan@debian.org> - 2018-04-03 05:20 +0200
              Re: Debian part of a version number when epoch is bumped "Christian T. Steigies" <cts@debian.org> - 2018-04-07 20:10 +0200
                Re: Debian part of a version number when epoch is bumped Ian Jackson <ijackson@chiark.greenend.org.uk> - 2018-04-09 15:30 +0200

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