Debian Bug report logs - #634248
debootstrap: Add support for XZ compressed binary packages

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Raphaël Hertzog <hertzog@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: debootstrap: Add support for XZ compressed binary packages

Date: Mon, 18 Jul 2011 08:43:02 +0200

Package: debootstrap
Version: 1.0.32
Severity: wishlist
User: debian-dpkg@lists.debian.org
Usertags: xz-compression

Hello,

we discussed some time ago on debian-devel (in a ftpmaster-related thread)
the possiblity to switch dpkg-deb to generate XZ-compressed debs by
default. ftp-master.debian.org is close to being ready for this but I
saw #633782 by accident which reminded that there's more to it than
just changing dpkg-deb :-)

Please can you add support for XZ-compressed .deb and/or tell us which
package should not use XZ compression so that we can modify them
to hardcode gzip usage?

Cheers,

-- System Information:
Debian Release: wheezy/sid
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'proposed-updates'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (150, 'experimental')
Architecture: i386 (x86_64)

Kernel: Linux 2.6.39-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages debootstrap depends on:
ii  wget                          1.12-3.1   retrieves files from the web

Versions of packages debootstrap recommends:
ii  debian-archive-keyring        2010.08.28 GnuPG archive keys of the Debian a
ii  gnupg                         1.4.11-3   GNU privacy guard - a free PGP rep

debootstrap suggests no packages.

-- no debconf information

Message #10 received at 634248@bugs.debian.org (full text, mbox, reply):

From: Otavio Salvador <otavio@ossystems.com.br>

To: Raphaël Hertzog <hertzog@debian.org>, 634248@bugs.debian.org

Subject: Re: Bug#634248: debootstrap: Add support for XZ compressed binary packages

Date: Sun, 24 Jul 2011 11:14:41 +0200

On Mon, Jul 18, 2011 at 08:43, Raphaël Hertzog <hertzog@debian.org> wrote:
> Please can you add support for XZ-compressed .deb and/or tell us which
> package should not use XZ compression so that we can modify them
> to hardcode gzip usage?

It seems XZ support has been included in 1.0.21, as can be seen at:

debootstrap (1.0.21) unstable; urgency=low

  [ Otavio Salvador ]
  * Apply patch from Clint Adams <schizo@debian.org> to add support for
    gz/bz2/xz data.tar (closes: #458663).
  ...

 -- Otavio Salvador <otavio@debian.org>  Sun, 21 Feb 2010 23:11:06 -0300

 About the use of xz I see no reason to use for base packages as it
has following consequences:

 * bigger memory footprint;
 * xz dependecy in host;

Specially the extra xz dependency can be problematic when using
debootstrap in non-Debian systems.

-- 
Otavio Salvador                             O.S. Systems
E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br

Message #15 received at 634248@bugs.debian.org (full text, mbox, reply):

From: Raphael Hertzog <hertzog@debian.org>

To: Otavio Salvador <otavio@ossystems.com.br>

Cc: 634248@bugs.debian.org, xz-utils@packages.debian.org

Subject: Re: Bug#634248: debootstrap: Add support for XZ compressed binary packages

Date: Sun, 24 Jul 2011 21:56:29 +0200

Hi Otavio,

On Sun, 24 Jul 2011, Otavio Salvador wrote:
> It seems XZ support has been included in 1.0.21, as can be seen at:

Yeah but debian-installer doesn't have bzip2 and xz in the host so it's
not really useful... you saw the recent bugs when libacl used bz2
compression.

>  About the use of xz I see no reason to use for base packages as it
> has following consequences:
> 
>  * bigger memory footprint;

This is mostly moot, it's 10Mb with the default compression level that we
plan to use.

>  * xz dependecy in host;

This is true but it's relatively small in size.

That said if you want to avoid it, what are the base packages where
it must absolutely be avoided?

All essential + their (transitive) dependencies?

I mean at some point dpkg and their dependencies have been unpacked
and debootstrap can/could switch to the chrooted dpkg instead of using
tar.xz + ar from the host.

Cheers,
-- 
Raphaël Hertzog ◈ Debian Developer

Follow my Debian News ▶ http://RaphaelHertzog.com (English)
                      ▶ http://RaphaelHertzog.fr (Français)

Message #20 received at 634248@bugs.debian.org (full text, mbox, reply):

From: Julien Cristau <jcristau@debian.org>

To: Raphael Hertzog <hertzog@debian.org>, 634248@bugs.debian.org

Cc: Otavio Salvador <otavio@ossystems.com.br>, xz-utils@packages.debian.org

Subject: Re: Bug#634248: debootstrap: Add support for XZ compressed binary packages

Date: Mon, 25 Jul 2011 20:23:08 +0200

On Sun, Jul 24, 2011 at 21:56:29 +0200, Raphael Hertzog wrote:

> That said if you want to avoid it, what are the base packages where
> it must absolutely be avoided?
> 
> All essential + their (transitive) dependencies?
> 
Seems like it's Priority: required (and dependencies) + binutils (for
the fakechroot variant).  debootstrap uses in_target dpkg for the rest,
from a quick look at the sid script.

Cheers,
Julien

Message #25 received at 634248@bugs.debian.org (full text, mbox, reply):

From: Joey Hess <joeyh@debian.org>

To: 634248@bugs.debian.org

Subject: wontfix?

Date: Sun, 21 Aug 2011 16:26:55 -0400

[Message part 1 (text/plain, inline)]

I think this is a wontfix, unless at some point in the future
it becomes common for busybox to be built with xz support. Otherwise, 
for the small benefit of slightly smaller base debs, we will prevent
people running debootstrap on the wide variety of embedded host systems,
which could have severe detrimental effects in Debian.

-- 
see shy jo

[signature.asc (application/pgp-signature, inline)]

Message #30 received at 634248-done@bugs.debian.org (full text, mbox, reply):

From: Ansgar Burchardt <ansgar@debian.org>

To: 634248-done@bugs.debian.org

Subject: Re: debootstrap: Add support for XZ compressed binary packages

Date: Mon, 12 Sep 2016 08:47:10 +0200

Version: 1.0.21

As mentioned in an earlier comment, XZ support for data.tar.* and (in a
later version) control.tar.* is already implemented for some time.  In
recent releases most base packages are also already compressed with XZ.

Ansgar

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