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From: "Ludovic Courtès" <ludo@gnu.org>
To: zimoun <zimon.toutoune@gmail.com>
Cc: guix-devel <guix-devel@gnu.org>
Subject: Re: Unreproducible “guix pack -f docker” because config.scm-builder
Date: Sat, 06 Feb 2021 22:46:22 +0100	[thread overview]
Message-ID: <87k0rkzx75.fsf@gnu.org> (raw)
In-Reply-To: <86lfc2bfb1.fsf@gmail.com> (zimoun's message of "Fri, 05 Feb 2021 18:22:10 +0100")

Hi,

zimoun <zimon.toutoune@gmail.com> skribis:

> First on Debian and second on Ubuntu
>
> $ stat /gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/libexec/getconf/POSIX_V6_LP64_OFF64
>   File: /gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/libexec/getconf/POSIX_V6_LP64_OFF64
>   Size: 29960           Blocks: 64         IO Block: 4096   regular file
> Device: 801h/2049d      Inode: 8129616     Links: 5
> Access: (0555/-r-xr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
> Access: 2021-02-05 17:37:15.728728952 +0100
> Modify: 1970-01-01 01:00:01.000000000 +0100
> Change: 2020-06-17 12:40:06.389935679 +0200
> Birth: -
>
> $ stat /gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/libexec/getconf/POSIX_V6_LP64_OFF64
> Fichier : /gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/libexec/getconf/POSIX_V6_LP64_OFF64
> Taille : 29960       Blocs : 64         Blocs d'E/S : 4096   fichier
> Périphérique : 814h/2068d       Inœud : 148900093   Liens : 1
> Accès : (0555/-r-xr-xr-x)  UID : (    0/    root)   GID : (    0/ root)
> Accès : 2021-02-05 17:46:05.537903382 +0100
> Modif. : 1970-01-01 01:00:01.000000000 +0100
> Changt : 2020-12-04 23:16:33.155711694 +0100
> Créé : -

See?  One has just 1 link (did you disable deduplication on that one?),
there other has 5 links.

>> I wonder if it could be that tar nowadays decides to preserve hard links
>> by default and one of your machine had this file hard-linked while the
>> other one didn’t.
>
> Wow, I thought that the same tar was used the one provided by Guix and
> not by the host.  For sure the default tar are not the same on both
> machine (v1.30 for Debian and v1.29 for Ubuntu).
>
> What is the md5sum checksum of ’guix pack -f docker hello’ on Guix
> System for commit b9a54aa?

--8<---------------cut here---------------start------------->8---
$ md5sum $(guix time-machine --commit=b9a54aa -- pack -f docker hello)
b5fe393d7966cbc3cd0be6e51d3aedc3  /gnu/store/nkvlqwzvxdlhzlc7vhfcngxc19x2ay2f-docker-pack.tar.gz
$ sha1sum $(guix time-machine --commit=b9a54aa -- pack -f docker hello)
a4dff93de6c0bc65eb325ebfeea398ebea944a85  /gnu/store/nkvlqwzvxdlhzlc7vhfcngxc19x2ay2f-docker-pack.tar.gz
$ guix time-machine --commit=b9a54aa -- pack -f docker hello -d
/gnu/store/323k33sfx869d0nkh69ary8sj6xiy4s4-docker-pack.tar.gz.drv
$ (mkdir /tmp/docker; tar xf $(guix time-machine --commit=b9a54aa -- pack -f docker hello ); tar tvf */layer.tar | grep ^h | head)
hr-xr-xr-x root/root         0 1970-01-01 01:00 gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/libexec/getconf/POSIX_V6_LP64_OFF64 kunligo al gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/bin/getconf
hr-xr-xr-x root/root         0 1970-01-01 01:00 gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/libexec/getconf/POSIX_V7_LP64_OFF64 kunligo al gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/bin/getconf
hr-xr-xr-x root/root         0 1970-01-01 01:00 gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/libexec/getconf/XBS5_LP64_OFF64 kunligo al gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/bin/getconf
hr--r--r-- root/root         0 1970-01-01 01:00 gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/crtendS.o kunligo al gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/crtend.o
hr--r--r-- root/root         0 1970-01-01 01:00 gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/install-tools/gsyslimits.h kunligo al gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/include-fixed/syslimits.h
hr--r--r-- root/root         0 1970-01-01 01:00 gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/install-tools/include/README kunligo al gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/include-fixed/README
hr--r--r-- root/root         0 1970-01-01 01:00 gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/install-tools/include/limits.h kunligo al gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/include-fixed/limits.h
hr--r--r-- root/root         0 1970-01-01 01:00 gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/plugin/include/gsyslimits.h kunligo al gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/include-fixed/syslimits.h
hrwxrwxrwx root/root         0 1970-01-01 01:00 gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/plugin/libcc1plugin.so.0 kunligo al gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/plugin/libcc1plugin.so
hrwxrwxrwx root/root         0 1970-01-01 01:00 gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/plugin/libcp1plugin.so.0 kunligo al gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/plugin/libcp1plugin.so
--8<---------------cut here---------------end--------------->8---

Most of these ‘h’ lines for hard links; ‘libcc1plugin.so’ seems to be an
exception (it’s a symlink).

Having looked at the tar manual (info "(tar) hard links"), it seems
clear that this is the default behavior and that we have to pass
‘--hard-dereference’ to avoid it.

Thanks,
Ludo’.


  reply	other threads:[~2021-02-06 21:46 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20210116182957.31075-1-ludo@gnu.org>
2021-01-27 13:14 ` bug#45919: [PATCH 0/8] Exporting a manifest and channels from a profile Ludovic Courtès
2021-01-27 21:02   ` [bug#45919] " zimoun
2021-01-28 15:54     ` Ludovic Courtès
2021-02-01 22:37       ` Unreproducible “guix pack -f docker” because config.scm-builder zimoun
2021-02-02 14:48         ` zimoun
2021-02-02 18:12         ` Ludovic Courtès
2021-02-02 20:11           ` zimoun
2021-02-05 10:09             ` Ludovic Courtès
2021-02-05 17:22               ` zimoun
2021-02-06 21:46                 ` Ludovic Courtès [this message]
2021-02-08 18:44                   ` [PATCH] Fix unreproducible “guix pack -f docker” (hard link) zimoun
     [not found]                   ` <86lfbzad42.fsf@gmail.com>
2021-02-09  8:35                     ` Unreproducible “guix pack -f docker” because config.scm-builder Ludovic Courtès
2021-02-09  8:51                       ` zimoun
2021-01-28 17:57     ` [bug#45919] [PATCH 0/8] Exporting a manifest and channels from a profile Bengt Richter
2021-01-29 19:13       ` zimoun
2021-01-28 17:04   ` bug#45919: " Pierre Neidhardt
2021-01-29 17:57     ` [bug#45919] " Pierre Neidhardt
2021-01-29 18:57       ` zimoun
2021-01-29 21:51         ` Pierre Neidhardt
2021-01-30 14:31           ` zimoun
2021-01-30 21:23             ` bug#45919: " Ludovic Courtès
2021-01-31  5:08               ` Ryan Prior
2021-02-01 13:30                 ` Ludovic Courtès
2021-01-30 13:55       ` Ludovic Courtès
2021-01-31 17:26         ` Pierre Neidhardt
2021-02-01 13:25           ` Ludovic Courtès
2021-02-01 15:32             ` Pierre Neidhardt
2021-02-01 17:04               ` Ludovic Courtès

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