Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.maint.dpkg > #12011

Re: DEP 17: Improve support for directory aliasing in dpkg

From Helmut Grohne <helmut@subdivi.de>
Newsgroups linux.debian.maint.dpkg, linux.debian.devel
Subject Re: DEP 17: Improve support for directory aliasing in dpkg
Date 2023-05-02 15:00 +0200
Message-ID <GqXLP-62gZ-3@gated-at.bofh.it> (permalink)
References (3 earlier) <Gnj8d-3IHC-1@gated-at.bofh.it> <Gnkxj-3JHS-1@gated-at.bofh.it> <Gowd3-4u2x-17@gated-at.bofh.it> <GoJtD-4CNn-3@gated-at.bofh.it> <GqVAl-612L-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

Cross-posted to 2 groups.

Show all headers | View raw

Hi Raphaël,

On Tue, May 02, 2023 at 12:30:21PM +0200, Raphael Hertzog wrote:
> We don't want to stat all the files in all packages but we could do better:
> if we are about to remove an old file that is available through a
> symlinked directory, we could check the new name of the file and see if
> it's available in some package... and if yes just forget the file without
> removing it.

Indeed, this is a neat idea. You are effectively implying that we only
ever move files from non-canonical locations to canonical locations and
never the other way round. I think this is a reasonable assumption and
this assumption is the one that makes your variant simpler.

I think there is a caveat (whose severity I am unsure about): In order
to rely on this (and on DEP 17), we will likely have versioned
Pre-Depends on dpkg. Can we reasonably rule out the case where and old
dpkg is running, unpacking a fixed dpkg, configuring the fixed dpkg and
then unpacking an affected package still running the unfixed dpkg
process?

> This file removal is the reason of the moratorium and incuring some extra
> cost in some specific cases (installation through directory symlinks which
> is not the default case, and would not affect us after the migration is
> complete) seems certainly fair.

I think the file loss problem is one sufficient reason to have the
moratorium. We didn't need other reasons once we knew this one. Now that
we look into dropping the moratorium, we need to ensure that there are
no reasons anymore and we learned that diversions are affected in a
non-trivial way. So even if we were to fix just the file loss problem,
the diversion problems would still be sufficient reason to keep the
moratorium unless they were also fixed by the approach. Here you need
both directions a) diverting a non-canonical location would have to
divert a canonical file and b) diverting a canonical location would have
to divert a non-canonical file. This is breaking the initial assumption.

In any case, this train of thought is definitely widening the solution
space. Thank you very much.

Helmut

Back to linux.debian.maint.dpkg | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-03 14:10 +0200
  Re: DEP 17: Improve support for directory aliasing in dpkg Guillem Jover <guillem@debian.org> - 2023-04-08 04:40 +0200
    Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-22 13:00 +0200
    Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-22 13:00 +0200
      Re: DEP 17: Improve support for directory aliasing in dpkg Guillem Jover <guillem@debian.org> - 2023-06-21 13:40 +0200
        Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-06-21 16:30 +0200
          Re: DEP 17: Improve support for directory aliasing in dpkg Guillem Jover <guillem@debian.org> - 2023-07-10 11:30 +0200
  Re: DEP 17: Improve support for directory aliasing in dpkg Raphael Hertzog <hertzog@debian.org> - 2023-04-21 14:20 +0200
    Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <luca.boccassi@gmail.com> - 2023-04-21 16:50 +0200
      Re: DEP 17: Improve support for directory aliasing in dpkg Simon McVittie <smcv@debian.org> - 2023-04-22 12:50 +0200
        Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <luca.boccassi@gmail.com> - 2023-04-22 14:30 +0200
        Re: DEP 17: Improve support for directory aliasing in dpkg Sam Hartman <hartmans@debian.org> - 2023-04-26 15:20 +0200
          Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-27 00:50 +0200
        Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-27 15:40 +0200
      Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-22 13:00 +0200
        Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <luca.boccassi@gmail.com> - 2023-04-22 14:30 +0200
          Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-25 21:10 +0200
            Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-04-25 22:40 +0200
              Re: DEP 17: Improve support for directory aliasing in dpkg Raphael Hertzog <hertzog@debian.org> - 2023-04-26 15:20 +0200
            Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-04-26 11:20 +0200
              Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-04-26 11:40 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Sven Joachim <svenjoac@gmx.de> - 2023-04-26 18:30 +0200
              Re: DEP 17: Improve support for directory aliasing in dpkg Raphael Hertzog <hertzog@debian.org> - 2023-05-02 12:40 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-02 15:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Raphael Hertzog <hertzog@debian.org> - 2023-05-03 10:40 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-03 12:30 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-05-03 20:40 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-04 19:20 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Timo Röhling <roehling@debian.org> - 2023-05-05 11:40 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-05-05 14:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Andreas Metzler <ametzler@bebt.de> - 2023-05-05 18:40 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-06 00:40 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-05-06 07:30 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-06 14:30 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-05-06 17:20 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-06 18:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-06 21:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-06 21:50 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-06 21:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-06 23:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Sean Whitton <spwhitton@spwhitton.name> - 2023-05-07 01:50 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-07 13:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Sean Whitton <spwhitton@spwhitton.name> - 2023-05-08 20:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-09 03:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-09 06:20 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-09 13:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-07 08:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Ansgar <ansgar@43-1.org> - 2023-05-07 09:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Ansgar <ansgar@43-1.org> - 2023-05-07 11:20 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-07 13:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-05-08 05:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-08 14:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-05-08 14:20 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Sean Whitton <spwhitton@spwhitton.name> - 2023-05-10 17:40 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Ansgar <ansgar@43-1.org> - 2023-05-10 21:30 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Russ Allbery <rra@debian.org> - 2023-05-10 23:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Ansgar <ansgar@43-1.org> - 2023-05-10 23:20 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Russ Allbery <rra@debian.org> - 2023-05-10 23:40 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) (was: Re: DEP 17: Improve support for directory aliasing in dpkg) Ansgar <ansgar@43-1.org> - 2023-05-11 00:00 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) Emilio Pozuelo Monfort <pochu@debian.org> - 2023-05-11 12:40 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) Simon Richter <sjr@debian.org> - 2023-05-11 14:30 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) Luca Boccassi <bluca@debian.org> - 2023-05-11 20:00 +0200
                Re: dpkg currently warning about merged-usr systems (revisited) Simon Richter <sjr@debian.org> - 2023-05-12 14:20 +0200
                Re: dpkg currently warning about merged-usr systems (revisited) Luca Boccassi <bluca@debian.org> - 2023-05-12 17:10 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) Simon Richter <sjr@debian.org> - 2023-05-12 14:30 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) Luca Boccassi <bluca@debian.org> - 2023-05-12 15:10 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) Matthew Vernon <matthew@debian.org> - 2023-05-25 14:10 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) (was: Re: DEP 17: Improve support for directory aliasing in dpkg) Helmut Grohne <helmut@subdivi.de> - 2023-05-21 16:30 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) (was: Re: DEP 17: Improve support for directory aliasing in dpkg) Ansgar <ansgar@43-1.org> - 2023-05-21 17:00 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) Ansgar <ansgar@43-1.org> - 2023-06-07 06:40 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) Ansgar <ansgar@43-1.org> - 2023-06-13 21:20 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) Matthew Garrett <mjg59@srcf.ucam.org> - 2023-06-13 22:10 +0200
                Bug#1035904: dpkg currently warning about merged-usr systems (revisited) Ansgar <ansgar@43-1.org> - 2023-06-13 22:30 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Ansgar <ansgar@43-1.org> - 2023-05-26 08:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Matthew Vernon <matthew@debian.org> - 2023-05-26 09:50 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Ansgar <ansgar@43-1.org> - 2023-05-26 10:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-26 10:50 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Matthew Vernon <matthew@debian.org> - 2023-05-26 11:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-07 14:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-07 16:50 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-07 23:20 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-08 03:30 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-08 11:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-08 23:40 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-05-09 03:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Sam Hartman <hartmans@debian.org> - 2023-05-08 21:10 +0200
                booststrapping /usr-merged systems (was: Re: DEP 17: Improve support  for directory aliasing in dpkg) Helmut Grohne <helmut@subdivi.de> - 2023-05-17 11:40 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) "G. Branden Robinson" <g.branden.robinson@gmail.com> - 2023-05-17 11:50 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Marco d'Itri <md@Linux.IT> - 2023-05-17 12:20 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Luca Boccassi <bluca@debian.org> - 2023-05-17 12:30 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Sam Hartman <hartmans@debian.org> - 2023-05-17 19:20 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Simon Richter <sjr@debian.org> - 2023-05-18 08:40 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Luca Boccassi <bluca@debian.org> - 2023-05-18 11:30 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Simon Richter <sjr@debian.org> - 2023-05-19 02:40 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Luca Boccassi <bluca@debian.org> - 2023-05-19 13:10 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Sam Hartman <hartmans@debian.org> - 2023-05-17 19:30 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Raphael Hertzog <hertzog@debian.org> - 2023-06-08 10:50 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Luca Boccassi <bluca@debian.org> - 2023-06-08 12:10 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Marco d'Itri <md@Linux.IT> - 2023-06-09 09:50 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Raphael Hertzog <hertzog@debian.org> - 2023-06-09 12:00 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Luca Boccassi <bluca@debian.org> - 2023-06-09 12:40 +0200
                Re: booststrapping /usr-merged systems Bjørn Mork <bjorn@mork.no> - 2023-06-09 13:10 +0200
                Re: booststrapping /usr-merged systems Marco d'Itri <md@Linux.IT> - 2023-06-09 13:40 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve support for directory aliasing in dpkg) Johannes Schauer Marin Rodrigues <josch@debian.org> - 2023-06-09 17:40 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Helmut Grohne <helmut@subdivi.de> - 2023-06-09 15:30 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve support for directory aliasing in dpkg) Johannes Schauer Marin Rodrigues <josch@debian.org> - 2023-06-09 17:50 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Helmut Grohne <helmut@subdivi.de> - 2023-06-09 18:30 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) HW42 <hw42@ipsumj.de> - 2023-06-09 22:30 +0200
                Re: booststrapping /usr-merged systems (was: Re: DEP 17: Improve  support for directory aliasing in dpkg) Helmut Grohne <helmut@subdivi.de> - 2023-06-10 07:40 +0200
                Re: booststrapping /usr-merged systems Sven Joachim <svenjoac@gmx.de> - 2023-06-10 08:40 +0200
                Re: booststrapping /usr-merged systems Sven Joachim <svenjoac@gmx.de> - 2023-06-10 09:00 +0200
                Re: booststrapping /usr-merged systems Helmut Grohne <helmut@subdivi.de> - 2023-06-10 10:50 +0200
                Re: booststrapping /usr-merged systems Sven Joachim <svenjoac@gmx.de> - 2023-06-10 19:30 +0200
                Re: booststrapping /usr-merged systems Luca Boccassi <bluca@debian.org> - 2023-06-10 21:00 +0200
                Re: booststrapping /usr-merged systems Timo Röhling <roehling@debian.org> - 2023-06-11 23:20 +0200
                Re: booststrapping /usr-merged systems Luca Boccassi <bluca@debian.org> - 2023-06-27 21:50 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg David Kalnischkies <david@kalnischkies.de> - 2023-05-03 15:10 +0200
            Re: DEP 17: Improve support for directory aliasing in dpkg Bastien ROUCARIES <roucaries.bastien@gmail.com> - 2023-04-26 16:50 +0200
            Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-27 00:50 +0200
              Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-04-27 08:00 +0200
              Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-28 10:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-04-28 11:40 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Timo Röhling <roehling@debian.org> - 2023-04-28 12:00 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Luca Boccassi <bluca@debian.org> - 2023-04-29 02:50 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Sam Hartman <hartmans@debian.org> - 2023-05-02 17:40 +0200
              Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-04-28 14:10 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-28 15:50 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Marvin Renich <mrvn@renich.org> - 2023-04-29 20:20 +0200
                Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-29 22:20 +0200
              Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-28 22:20 +0200
      Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-02 15:00 +0200
        Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-02 15:10 +0200
        Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-05-02 16:00 +0200
    Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-22 13:00 +0200
  Re: DEP 17: Improve support for directory aliasing in dpkg Raphael Hertzog <hertzog@debian.org> - 2023-04-21 15:10 +0200
    Re: DEP 17: Improve support for directory aliasing in dpkg Simon Richter <sjr@debian.org> - 2023-04-21 19:30 +0200
    Re: DEP 17: Improve support for directory aliasing in dpkg Helmut Grohne <helmut@subdivi.de> - 2023-04-22 13:00 +0200
      Re: DEP 17: Improve support for directory aliasing in dpkg Simon McVittie <smcv@debian.org> - 2023-04-22 15:50 +0200
      Re: DEP 17: Improve support for directory aliasing in dpkg Raphael Hertzog <hertzog@debian.org> - 2023-04-24 11:40 +0200

csiph-web