Bug#845651: marked as done (lsb-release: --codename returns n/a on stretch without apt sources configured)

[email protected] (Debian Bug Tracking System) Sun, 08 Jan 2017 19:39:06 +0000
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Your message dated Sun, 08 Jan 2017 19:35:13 +0000
with message-id <[email protected]>
and subject line Re: Bug#845651: lsb-release: --codename returns n/a on str=
etch without apt sources configured
has caused the Debian Bug report #845651,
regarding lsb-release: --codename returns n/a on stretch without apt source=
s configured
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.

(NB: If you are a system administrator and have no idea what this
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--=20
845651: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=3D845651
Debian Bug Tracking System
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Message-ID: <[email protected]>
Subject: lsb-release: --codename returns n/a on stretch without apt sources
 configured
From: Luca Boccassi <[email protected]>
To: "[email protected]" <[email protected]>
Date: Fri, 25 Nov 2016 15:42:15 +0000
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Package: lsb-release
Version: 9.20161101
Severity: important
Tags: patch

Dear maintainer,

Currently lsb_release parses /etc/debian_version and figures out the
testing codename and stores it. But it never uses it unless apt can be
used, which depends on network access.
Without network access and apt sources downloaded, lsb_release -c on
stretch returns n/a. So a simple way to reproduce it is to comment out
all entries in sources.list(.d/*), apt-get update and running
lsb_release -c on stretch.

The fix is simple and just sets the codename after
parsing /etc/debian_release.
A simple patch is attached.

Thank you!

Kind regards,
Luca Boccassi


=46rom c7de044f737f6df4ba8e6501fcb106aecc83e577 Mon Sep 17 00:00:00 2001
From: Luca Boccassi <[email protected]>
Date: Fri, 25 Nov 2016 15:26:17 +0000
Subject: [PATCH] Fix detecting debian testing release without apt

Currently lsb_release parses /etc/debian_version and figures out the
testing codename and stores it. But it never uses it unless apt can
be used, which depends on network access.
Without network access and apt sources downloaded, lsb_release -c
on stretch returns n/a.
The fix is simple and just sets the codename after parsing
/etc/debian_release.
---
 lsb_release.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lsb_release.py b/lsb_release.py
index 221a321..f134518 100644
--- a/lsb_release.py
+++ b/lsb_release.py
@@ -273,6 +273,7 @@ def guess_debian_release():
             if release.rstrip('/sid').lower() !=3D 'testing':
                 global TESTING_CODENAME
                 TESTING_CODENAME =3D release.rstrip('/sid')
+                distinfo['CODENAME'] =3D release.rstrip('/sid')
             distinfo['RELEASE'] =3D 'testing/unstable'
         else:
             distinfo['RELEASE'] =3D release
--=20
2.1.4

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Message-ID: <[email protected]>
Subject: Re: Bug#845651: lsb-release: --codename returns n/a on stretch
 without apt sources configured
From: Luca Boccassi <[email protected]>
To: Didier 'OdyX' Raboud <[email protected]>
Cc: [email protected]
Date: Sun, 08 Jan 2017 19:35:13 +0000
In-Reply-To: <[email protected]>
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On Sun, 2017-01-08 at 18:37 +0100, Didier 'OdyX' Raboud wrote:
> Control: tags -1 +wontfix=20
>=20
> Hi there Luca,
>=20
> Le dimanche, 8 janvier 2017, 14.54:16 h CET Luca Boccassi a =C3=A9crit :
> > Any chance this could be looked at before Stretch final freeze? Thank y=
ou!
>=20
> tl;dr: unfortunately not.
>=20
> I have thought about this issue for some time, and I think that the resul=
t is=20
> actually correct. Let me explain:
>=20
> When (as currently), stretch is the testing release, /etc/debian_version=
=20
> contains "stretch/sid", as shipped by base-files. It is therefore impossi=
ble=20
> to rely on that file to differentiate between a host running testing or=
=20
> unstable without asking apt what is actually preferred when installing=
=20
> packages (through parsing `apt-cache policy`). That's how `lsb-release --
> codename` returns "sid" _xor_ "stretch".
>=20
> stretch's base-files is currently in version 9.7, and ships with "stretch=
/sid"=20
> in /etc/debian_version. But if you look at base-files in the current stab=
le=20
> (8+deb8u6), its /etc/debian_version currently contains "8.6", and with th=
at,=20
> `lsb-release --codename` returns "jessie" consistently, and without relyi=
ng on=20
> apt.
>=20
> base-files will be updated in stretch for the release, as happened for je=
ssie:
> > * Release for jessie as stable:
> >   - Use "8" as version in /etc/issue and /etc/issue.net. As usual, this
> >     is never expected to change once that jessie is released as Debian =
8.
> >   - Use 8.0 as version in /etc/debian_version. As usual, this is expect=
ed
> >     to change at every point release.
>=20
> So, if you manually replace your /etc/debian_version's content by "9.0", =
you=20
> should get "stretch" consistently, no matter what your apt configuration =
is.
>=20
> That's all to say that this bug is (to my belief) actually expected behav=
iour;=20
> and fixing it through forcing the codename to be interpreted as "stretch"=
 when=20
> apt-cache information is unavailable would be wrong. When /etc/debian_ver=
sion=20
> contains "potato/sid", the codename is either potato xor sid, and only ap=
t-
> cache can discriminate a testing host from a sid host. Therefore, in such=
 a=20
> situation, the correct answer is actually "I can't tell", aka "n/a".

Hello Didier,

Thank you for your answer, it makes sense. We build only for testing
internally so I did not consider the unstable case at first but I
understand now, so closing the bug.

Kind regards,
Luca Boccassi

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