Debian Bug report logs - #1030727
multipath-tools: please make the build reproducible

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

From: "Chris Lamb" <lamby@debian.org>

To: submit@bugs.debian.org

Subject: multipath-tools: please make the build reproducible

Date: Mon, 06 Feb 2023 12:19:41 -0800

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

Source: multipath-tools
Version: 0.9.4-2
Severity: wishlist
Tags: patch
User: reproducible-builds@lists.alioth.debian.org
Usertags: randomness
X-Debbugs-Cc: reproducible-bugs@lists.alioth.debian.org

Hi,

Whilst working on the Reproducible Builds effort [0] we noticed that
multipath-tools could not be built reproducibly.

This is because there is a race condition in the build/installation of
the manpages. Specifically, it is possible for the manpages to either
be regenerated in a build (and therefore lead to the date being set to
the value of SOURCE_DATE_EPOCH), but it also possible for them not to
be processed at all, thus leading them to be installed as-is with a
date of "March 2018".

Naturally, this is nondeterminstic so somewhat difficult to
programmatically trigger, but I found running the build in a loop will
find a difference within 5 or 6 runs or so.

I can't seem to locate a deep fix, but a patch is attached that forces
the build to be single-threaded via the addition of the --parallel=1
switch. I found that both the build and udeb build variants need to
have this option.

 [0] https://reproducible-builds.org/


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby@debian.org / chris-lamb.co.uk
       `-

[multipath-tools.diff.txt (text/plain, attachment)]

Message #10 received at 1030727-close@bugs.debian.org (full text, mbox, reply):

From: Debian FTP Masters <ftpmaster@ftp-master.debian.org>

To: 1030727-close@bugs.debian.org

Subject: Bug#1030727: fixed in multipath-tools 0.9.4-3

Date: Tue, 07 Feb 2023 10:51:18 +0000

Source: multipath-tools
Source-Version: 0.9.4-3
Done: Chris Hofstaedtler <zeha@debian.org>

We believe that the bug you reported is fixed in the latest version of
multipath-tools, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1030727@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Chris Hofstaedtler <zeha@debian.org> (supplier of updated multipath-tools package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


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Hash: SHA256

Format: 1.8
Date: Tue, 07 Feb 2023 10:16:57 +0000
Source: multipath-tools
Architecture: source
Version: 0.9.4-3
Distribution: unstable
Urgency: medium
Maintainer: Debian DM Multipath Team <team+linux-blocks@tracker.debian.org>
Changed-By: Chris Hofstaedtler <zeha@debian.org>
Closes: 1030727
Changes:
 multipath-tools (0.9.4-3) unstable; urgency=medium
 .
   [ Chris Lamb ]
   * [f6f7ab0] Avoid race condition in man page build.
     Leads to unreproducible contents. (Closes: #1030727)
Checksums-Sha1:
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 cf4f482f3b0b254ba98503103ef7d4f2d45b9d00 29176 multipath-tools_0.9.4-3.debian.tar.xz
 7097ab02f31379fbccf50a716a107e75aa825a99 6258 multipath-tools_0.9.4-3_source.buildinfo
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 36dbc26b8e2dea13d8c5753fee1d316a3f98c13d0ccea2aad47c50d579895be2 29176 multipath-tools_0.9.4-3.debian.tar.xz
 13e0d4da5a54ea97923fe3c6be6db8523872bf19a8767a0407246e883b68b773 6258 multipath-tools_0.9.4-3_source.buildinfo
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Message #15 received at 1030727@bugs.debian.org (full text, mbox, reply):

From: Chris Hofstaedtler <zeha@debian.org>

To: Chris Lamb <lamby@debian.org>, 1030727@bugs.debian.org

Subject: Re: Bug#1030727: multipath-tools: please make the build reproducible

Date: Tue, 7 Feb 2023 15:48:29 +0100

Hello Chris,

* Chris Lamb <lamby@debian.org> [230206 21:24]:
> Source: multipath-tools
> Version: 0.9.4-2
> Severity: wishlist
> Tags: patch
[..]
> I can't seem to locate a deep fix, but a patch is attached that forces
> the build to be single-threaded via the addition of the --parallel=1
> switch. I found that both the build and udeb build variants need to
> have this option.

Thank you, I have applied your patch, and noted a reason as a
comment.

Best,
Chris

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