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Bug#706772: marked as done (dpkg --set-selections ignores available packages never installed or removed by dpkg)

Your message dated Wed, 19 Apr 2017 11:31:42 +0200
with message-id <20170419093142.alpsf3q5aj5hoca3@gaara.hadrons.org>
and subject line Re: Bug#706772: dpkg --set-selections ignores available packages never installed or removed by dpkg
has caused the Debian Bug report #706772,
regarding dpkg --set-selections ignores available packages never installed or removed by dpkg
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
706772: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=706772
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: dpkg
Version: 1.16.9
Severity: normal

Dear Maintainers,

I recently noticed that the workflow to install in a basic box the
list of extra packages present in other more complete box seems to
no longer work

full-box#  dpkg --get-selections > desired-selections.txt
basic-box# dpkg --get-selections < desired-selections.txt
basic-box# apt-get upgrade

This is better seen in a chroot with following sequence

# debootstrap sid mychroot http://http.debian.net/debian
# chroot mychroot

In the chroot:

mychroot# apt-get update
mychroot# echo "joe install" | dpkg --set-selections
... dpkg: warning: package not in database at line 1: joe
mychroot# apt-get upgrade
... 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
mychroot# dpkg --get-selections | grep joe

Selection seems lost. Trying with apt-get dselect-upgrade does not help

mychroot# apt-get install dselect
mychroot# apt-get dselect-upgrade
... 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
mychroot# dselect update
mychroot# apt-get dselect-upgrade
... 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Only if I set selections again after "dselect update" things work (althouch
only for "apt-get dselect-upgrade"). After previous commands

mychroot# echo "joe install" | dpkg --set-selections
mychroot# apt-get upgrade
... 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

mychroot# apt-get dselect-upgrade
... 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
... Setting up joe (3.7-2.3) ...

--------------------

Seems that dpkg ignores setting values for packages that were never installed
or removed in the system, although they are available and can be retrieved
with apt-get. I guess "dselect update" adds apropriate entries to database
that can later be set.

IIRC this workflow is described in a number of places to clone a system, so
behavior should be fixed or clarified. If this change is intentional, some
comment should be added to dpkg man page or to README file. 

Regards,

-- System Information:
Debian Release: 7.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable'), (200, 'unstable'), (1,
'experimental')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-4-686-pae (SMP w/1 CPU core)
Locale: LANG=es_ES.ISO-8859-1, LC_CTYPE=es_ES.ISO-8859-1
(charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/bash

Versions of packages dpkg depends on:
ii  libbz2-1.0   1.0.6-4
ii  libc6        2.13-38
ii  liblzma5     5.1.1alpha+20120614-2
ii  libselinux1  2.1.9-5
ii  tar          1.26+dfsg-0.1
ii  zlib1g       1:1.2.7.dfsg-13

dpkg recommends no packages.

Versions of packages dpkg suggests:
ii  apt  0.9.7.8

-- no debconf information

-- 
Agustin

--- End Message ---
--- Begin Message --- 
Hi!

On Mon, 2017-04-17 at 09:25:31 -0400, Antoine Beaupre wrote:
> On Sat, May 04, 2013 at 02:24:01PM -0700, Jonathan Nieder wrote:
> > Index: issues.dbk
> > ===================================================================
> > --- issues.dbk	(révision 10063)
> > +++ issues.dbk	(copie de travail)
> > @@ -384,6 +384,24 @@
> >    </para>
> >  </section>
> >  
> > +<section id="dpkg-set-selections">
> > +  <title><command>dpkg --set-selections</command> changes</title>
> > +  <para>
> > +    The <command>dpkg --set-selections</command> command is now aware of the
> > +    architecture of packages it selects and can only set the state for known
> > +    packages. Therefore an up-to-date <filename>available</filename>
> > +    database is needed for the command to be useful.
> > +  </para>
> > +  <para>
> > +    To update the <filename>available</filename> database on an
> > +    <systemitem role="package">apt</systemitem>-based system, run the
> > +    <command>sync-available</command> command from the
> > +    <systemitem role="package">dctrl-tools</systemitem> package.
> > +    See the <ulink url="&url-wiki;Teams/Dpkg/FAQ">dpkg FAQ</ulink>
> > +    for more information.
> > +  </para>
> > +</section>
> > +
> >  <section id="cyrus-sasl">
> >    <title>Cyrus SASL SQL backends</title>
> >    <para>
> 
> Is this still relevant? The patch probably doesn't apply anymore, and
> this bug has been inactive for over 4 years... 
> 
> Should we just close this?

Yeah, not much point now I guess. And dpkg already emits warnings and
points to the FAQ so that pople can updated the available file.

Closing.

Thanks,
Guillem

--- End Message ---
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