From: zimoun <zimon.toutoune@gmail.com>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: guix-devel <guix-devel@gnu.org>
Subject: Re: Unreproducible “guix pack -f docker” because config.scm-builder
Date: Tue, 02 Feb 2021 21:11:33 +0100 [thread overview]
Message-ID: <86eehycjre.fsf@gmail.com> (raw)
In-Reply-To: <877dnqe3to.fsf@gnu.org>
Hi,
On Tue, 02 Feb 2021 at 19:12, Ludovic Courtès <ludo@gnu.org> wrote:
> It turns out that, as is always the case with GNU Standards compliant
> configure script, the default value for --prefix is /usr/local, and the
> default for --sysconfdir is $prefix/etc.
As discussed on IRC, it is not mentioned in the manual. What the manual
describes is:
./bootstrap
./configure --localstatedir=/var/
make
therefore, if one runs:
./pre-inst-env guix pull
then the sysconfdir is set to /usr/local/etc because it is the default.
And so it leads to subtle differences really hard to guess. I think it
is worth to add one sentence or footnote at the end of the section
«Running Guix Before It Is Installed», right after:
Note that ./pre-inst-env guix pull does not upgrade the local
source tree; it simply updates the ~/.config/guix/current
symlink (see Invoking guix pull). Run git pull instead if you
want to upgrade your local source tree.
Something like: «Note that ’guix pull’ preserves the settings of the host
Guix, for instance ’sysconfdir’, and by default the GNU standards set
’prefix’ to ’/usr/local/’ and ’sysconfdir’ to ’$prefix/etc’, whereas
regular Guix uses ’--sysconfdir=/etc/’.»
WDYT?
> You did find other differences eventually though, right?
The produced tarballs have the same Guix hash, i.e., all the same
inputs, but not the same outputs, compare with commit b9a54aa:
A-machine$ md5sum /gnu/store/nkvlqwzvxdlhzlc7vhfcngxc19x2ay2f-docker-pack.tar.gz
b5fe393d7966cbc3cd0be6e51d3aedc3 /gnu/store/nkvlqwzvxdlhzlc7vhfcngxc19x2ay2f-docker-pack.tar.gz
B-machine$ md5sum /gnu/store/nkvlqwzvxdlhzlc7vhfcngxc19x2ay2f-docker-pack.tar.gz
e47b9a38b7162f7fb093b97e19dbc1ca /gnu/store/nkvlqwzvxdlhzlc7vhfcngxc19x2ay2f-docker-pack.tar.gz
C-machine$ md5sum /gnu/store/nkvlqwzvxdlhzlc7vhfcngxc19x2ay2f-docker-pack.tar.gz
b5fe393d7966cbc3cd0be6e51d3aedc3 /gnu/store/nkvlqwzvxdlhzlc7vhfcngxc19x2ay2f-docker-pack.tar.gz
And diffoscope returns these differences, something about links, IIUC:
--8<---------------cut here---------------start------------->8---
--- /tmp/docker-meary/4ca83868d5e98cb06179a2a7372afe029c10d43bdc9fbfcc5771b89da74889b8/layer.tar
+++ /tmp/docker-pfiuh02/4ca83868d5e98cb06179a2a7372afe029c10d43bdc9fbfcc5771b89da74889b8/layer.tar
├── file list
│ @@ -823,17 +823,17 @@
[...]
│ --r-x… 29960 gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/libexec/getconf/POSIX_V6_LP64_OFF64
[...]
│ +hr-x… 0 gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/libexec/getconf/POSIX_V6_LP64_OFF64
[...]
├── gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/libexec/getconf/POSIX_V6_LP64_OFF64
│ @@ -1,1873 +0,0 @@
│ -00000000: 7f45 4c46 0201 0100 0000 0000 0000 0000 .ELF............
│ -00000010: 0200 3e00 0100 0000 3015 4000 0000 0000 ..>.....0.@.....
│ -00000020: 4000 0000 0000 0000 486d 0000 0000 0000 @.......Hm......
│ -00000030: 0000 0000 4000 3800 0b00 4000 1f00 1e00 ....@.8...@.....
│ -00000040: 0600 0000 0400 0000 4000 0000 0000 0000 ........@.......
│ -00000050: 4000 4000 0000 0000 4000 4000 0000 0000 @.@.....@.@.....
│ -00000060: 6802 0000 0000 0000 6802 0000 0000 0000 h.......h.......
[...]
--8<---------------cut here---------------end--------------->8---
(Slightly edited to ease the reading, and raw at
<https://paste.debian.net/1183728/>.)
On machines A and C, empty file because hard link. But on machine B,
the files are there. Tiny files I guess, the size difference is:
23104 vs 23136.
Cheers,
simon
next prev parent reply other threads:[~2021-02-02 20:21 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 [this message]
2021-02-05 10:09 ` Ludovic Courtès
2021-02-05 17:22 ` zimoun
2021-02-06 21:46 ` Ludovic Courtès
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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