bug#28664: gst-plugins-base-1.12.3.tar.xz nar on berlin returns 404

[ludo@gnu.org (Ludovic Courtès)]

Hello Maxim,

Maxim Cournoyer <maxim.cournoyer@gmail.com> skribis:

> Downloading https://berlin.guixsd.org/nar/g2ph0s1bjnzzn3q3h2pb8zw87bdxf697-gst-plugins-base-1.12.3.tar.xz...
> guix substitute: error: download from 'https://berlin.guixsd.org/nar/g2ph0s1bjnzzn3q3h2pb8zw87bdxf697-gst-plugins-base-1.12.3.tar.xz' failed: 404, "Not Found"

I think it’s a bug in ‘guix publish’: the narinfo is still here:

--8<---------------cut here---------------start------------->8---
$ wget -q -O - https://berlin.guixsd.org/g2ph0s1bjnzzn3q3h2pb8zw87bdxf697.narinfo
StorePath: /gnu/store/g2ph0s1bjnzzn3q3h2pb8zw87bdxf697-gst-plugins-base-1.12.3.tar.xz
URL: nar/g2ph0s1bjnzzn3q3h2pb8zw87bdxf697-gst-plugins-base-1.12.3.tar.xz
Compression: none
NarHash: sha256:07rx2px28pv6vqvzww4i0sldjray4q4jfggz9x0vp3wqla78rwm5
NarSize: 3117480
References: 
FileSize: 3117480
System: i686-linux
Deriver: mx8rpg1qqbl4244r2xsn3g59lw671sh3-gst-plugins-base-1.12.3.tar.xz.drv
Signature: 1;berlin.guixsd.org;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
--8<---------------cut here---------------end--------------->8---

but the tarball itself is missing.

On berlin, the narinfo is indeed around:

--8<---------------cut here---------------start------------->8---
$ sudo ls -l /var/cache/guix/publish/none/g2ph0s1bjnzzn3q3h2pb8zw87bdxf697*
-rw------- 1 guix-publish guix-publish 998 Sep 19 11:12 /var/cache/guix/publish/none/g2ph0s1bjnzzn3q3h2pb8zw87bdxf697-gst-plugins-base-1.12.3.tar.xz.narinfo
--8<---------------cut here---------------end--------------->8---

So the problem is that for uncompressed store items (‘guix publish’
serves *.tar.xz without any additional compression, so it uses the
‘none’ compression method from its viewpoint), ‘guix publish’ does not
keep the nar in /var/cache/guix/publish, so it cannot guarantee its TTL.

The fix is probably simply to store nars even for uncompressed store
items, even if that increases disk usage.

Ludo’.