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Bug#1117393: debian-installer-netboot-images: FTBFS: http:///dists/trixie/Release.gpg: Invalid host name.

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Control: retitle -1 FTBFS when apt is configured with *.sources instead of *.list

Santiago Vila <sanvila@debian.org> (2025-10-05):
> That's a very good question :-). In fact, I made a mistake here: The
> full build log which I provided initially was wrong, as it was made
> using the unshare backend, and it's already known that this package
> needs network access.
> 
> (You can tell that I'm using the unshare backend if you see
> "Distribution: sid-unshare" in the build log).
> 
> 
> But now I've tried again using the file backend (which allows network
> access) and I get the same error. I've put the right build log in the
> same directory as above, replacing the wrong one:
> 
> https://people.debian.org/~sanvila/build-logs/202510/
> 
> (and this time you will see "Distribution: sid-file", which means
> I was using the traditional file-based backend).
> 
> So, yes, I believe there is a real problem here and it's not yet
> another case of "needs network access to build".

Thanks for arranging access, which lets me reproduce this there.

get-mirror.sh looks into `apt-config dump` to get some variables, then
digs into the “main” sources.list and the possible extra sources.d
snippets, based on the APT_DIR_ETC, APT_SOURCELIST, and APT_SOURCEPARTS
variables set according to the apt configuration.

On this specific system, we have a debian.sources snippet that contains:

    Types: deb deb-src
    URIs: http://deb.debian.org/debian
    Suites: sid
    Components: main contrib non-free non-free-firmware
    Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg

and also a sbuild-build-depends-archive.list snippet that contains:

    deb [trusted=yes] copy:///build/reproducible-path/resolver-sOG2tA/apt_archive ./
    deb-src [trusted=yes] copy:///build/reproducible-path/resolver-sOG2tA/apt_archive ./

so we need to teach get-mirror.sh about .sources files.

At the very least, we should change this to avoid feeding .sources files
to something that expects .list ones:

    -MIRRORS="$(get_mirrors /$APT_DIR_ETC/$APT_SOURCELIST /$APT_DIR_ETC/$APT_SOURCEPARTS/*)"
    +MIRRORS="$(get_mirrors /$APT_DIR_ETC/$APT_SOURCELIST /$APT_DIR_ETC/$APT_SOURCEPARTS/*.list)"


Looking briefly at `apt-config dump` and sources.list(5), there doesn't
seem to be anything specific to .sources files in the configuration, so
using the three existing variables as they are should be fine enough,
except:

 - one pass for the traditional format, main and snippets (*.list, see
   above)
 - one pass for the new format, snippets only (*.sources this time).


Thanks for the report (and again for the access), Santiago!

Feel free to scratch (my access to) the VM, commenting out an existing
sources.list and deploying a sources.list.d/santiago.sources (copied
from the first quoted section above) is enough to reproduce the problem.


Cheers,
-- 
Cyril Brulebois (kibi@debian.org)            <https://debamax.com/>
D-I release manager -- Release team member -- Freelance Consultant

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Bug#1117393: debian-installer-netboot-images: FTBFS: http:///dists/trixie/Release.gpg: Invalid host name. Santiago Vila <sanvila@debian.org> - 2025-10-05 19:40 +0200
  Bug#1117393: debian-installer-netboot-images: FTBFS: http:///dists/trixie/Release.gpg: Invalid host name. Cyril Brulebois <kibi@debian.org> - 2025-10-05 21:10 +0200
  Processed: Re: Bug#1117393: debian-installer-netboot-images:  FTBFS: http:///dists/trixie/Release.gpg: Invalid host name. "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-10-05 23:10 +0200
  Bug#1117393: debian-installer-netboot-images: FTBFS: http:///dists/trixie/Release.gpg: Invalid host name. Cyril Brulebois <kibi@debian.org> - 2025-10-05 23:10 +0200
  Bug#1117393: debian-installer-netboot-images: FTBFS when apt is configured with *.sources instead of *.list Santiago Vila <sanvila@debian.org> - 2025-11-17 19:20 +0100
    Bug#1117393: debian-installer-netboot-images: FTBFS when apt is configured with *.sources instead of *.list Cyril Brulebois <kibi@debian.org> - 2025-11-17 20:00 +0100

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