[Pkg-cups-devel] Bug#774918: Fwd: Re: Bug#776072: dpkg-maintscript-helper dir_to_symlink explodes on subtree in cups-pdf package

[Martin-Éric Racine]

2015-01-23 18:14 GMT+02:00 Andreas Beckmann <anbe at debian.org>:
>
>
>
> -------- Forwarded Message --------
> Subject: Re: Bug#776072: dpkg-maintscript-helper dir_to_symlink explodes
> on subtree in cups-pdf package
> Date: Fri, 23 Jan 2015 17:12:17 +0100
> From: Guillem Jover <guillem at debian.org>
> To: Andreas Beckmann <anbe at debian.org>, 776072-done at bugs.debian.org
>
> Hi!
>
> On Fri, 2015-01-23 at 16:44:53 +0100, Andreas Beckmann wrote:
>> Package: dpkg
>> Version: 1.17.23
>> Severity: serious
>> Control: block 774918 by -1
>
> I don't think this is a bug in dpkg, see below.
>
>> cups-pdf recently switched to dir_to_symlink which explodes for whatever
>> reason (the cups-pdf bug is #774918):
>>
>>   Selecting previously unselected package printer-driver-cups-pdf.
>>   Preparing to unpack .../printer-driver-cups-pdf_2.6.1-14.1_amd64.deb ...
>>   Unpacking printer-driver-cups-pdf (2.6.1-14.1) ...
>>   Replacing files in old package cups-pdf (2.6.1-6) ...
>>   Preparing to unpack .../cups-pdf_2.6.1-14.1_all.deb ...
>>   dpkg-query: no packages found matching cups-pdf:all
>>   dpkg-query: package 'cups-pdf' is not installed
>>   Use dpkg --info (= dpkg-deb --info) to examine archive files,
>>   and dpkg --contents (= dpkg-deb --contents) to list their contents.
> […]
>>   dpkg-maintscript-helper: error: directory '/usr/share/doc/cups-pdf' contains files not owned by package cups-pdf:all, cannot switch to symlink
>>   dpkg: error processing archive /var/cache/apt/archives/cups-pdf_2.6.1-14.1_all.deb (--unpack):
>>    subprocess new pre-installation script returned error exit status 1
>>   Preparing to unpack .../libreadline5_5.2+dfsg-2_amd64.deb ...
>>   Unpacking libreadline5:amd64 (5.2+dfsg-2) over (5.2+dfsg-2~deb7u1) ...
>>   Preparing to unpack .../libpam-runtime_1.1.8-3.1_all.deb ...
>>   Unpacking libpam-runtime (1.1.8-3.1) over (1.1.3-7.1) ...
>>   Errors were encountered while processing:
>>    /var/cache/apt/archives/cups-pdf_2.6.1-14.1_all.deb
>
> That's because the previous version (2.6.1-6) was an arch:any package,
> so the dpkg-query on cups-pdf:all does not find it. This works as
> expected, and a fix needs to be implemented in cups-pdf itsel to cope
> with that.

Right. I have changed that back to arch:any in 2.6.1-15, since
dh_installdoc complains about it too.

>> At this point we still have these files:
>>
>> # dpkg -S $(find /usr/share/doc/cups-pdf)
> […]
>
> Yes, if dpkg-maintscript-helper cannot do its job it will abort.
>
>> and the preinst looks like this:
>>
>> #!/bin/sh
>> set -e
>> # Automatically added by dh_installdeb
>> dpkg-maintscript-helper dir_to_symlink /usr/share/doc/cups-pdf /usr/share/doc/printer-driver-cups-pdf -- "$@"
>> # End automatically added section
>
> This needs to be passed the correct arch-qualified package name (either
> :<arch> or :all) for the previous package. Thus closing. But feel free
> to reopen if I missed something else.

There is exactly one release that has that arch:all.  Preveious and
later releases use arch:any to maintain continuity and please DPKG.
Basicall,y this won't show when upgrading to Jessie.

Martin-Éric