FTBFS gitsome 0.8.0+ds-9 fails to build without python3-six

[Hans Joachim Desserud]

gitsome 0.8.0+ds-9 was synced from Debian to Ubuntu Oracular but fails to build with the following error message:

ModuleNotFoundError: No module named 'six'

(https://launchpadlibrarian.net/730825470/buildlog_ubuntu-oracular-amd64.gitsome_0.8.0+ds-9_BUILDING.txt.gz)

Interestingly enough, the same package builds successfully in Debian Sid. One notable difference is that python3-six is installed as part of the build:
Get: 102 http://deb.debian.org/debian unstable/main amd64 python3-six all 1.16.0-6 [16.3 kB]
(https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/gitsome.html)

I could not find a corresponding line in the build log for Ubuntu. I am not sure why, but adding the build dependency manually fixes the build.

The question is how to address this. I will add a debdiff below which resolves the issue to make gitsome build successfully. Normally the patch should be forwarded or applied to Debian, though for now this only seems to be a problem in Ubuntu. Also, it looks Debian is pulling in python3-six as a transitive dependency but I don't know how to drill down where it comes from to see the actual delta between Debian and Ubuntu causing this issue.

ProblemType: Bug
DistroRelease: Ubuntu 24.10
Package: gitsome (not installed)
ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1
Uname: Linux 6.8.0-31-generic x86_64
ApportVersion: 2.28.1-0ubuntu4
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun May 26 10:47:19 2024
InstallationDate: Installed on 2024-04-26 (30 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: gitsome
UpgradeStatus: Upgraded to oracular on 2024-05-26 (0 days ago)

[Ubuntu Foundations Team Bug Bot (crichton)]

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[Miriam España Acebal (mirespace)]

Hi Hans,

I recently fixed a similar issue for python-chemspipy package [1]. Sharing here in case it helps.

Yes, the needed fix is adding python3-six as you did. Why?

Summarizing, the key is python3-urllib3: we're syncing it from experimental, not from sid/trixie, and this latest version from experimental doesn't have the six module embedded as it was used to have (check changelog [2]).

python3-urllib3 comes from python3-request that comes from python3-pytest (as Build dependency in gitsome/d/control).

[1] https://code.launchpad.net/~mirespace/ubuntu/+source/python-chemspipy/+git/python-chemspipy/+merge/466962
[2] https://launchpad.net/ubuntu/+source/python-urllib3/2.0.7-1

[Alexandre Detiste (alexandre-detiste)]

Nice explanation.

[Athos Ribeiro (athos-ribeiro)]

Thanks, Hans.

I updated the changelog to targed oracular, ran "update-maintainer" to update the maintainer field to comply with the Ubuntu policy, and uploaded it.

[Hans Joachim Desserud (hjd)]

> Summarizing, the key is python3-urllib3: we're syncing it from experimental

Aha, that makes sense. Out of curiosity, how did you track down this specific dependency? Because doing it manually would require to check all build dependencies and in turn their dependencies to find the difference between Ubuntu and Debian.

Looks like in the meantime the new version of python3-urllib3 has been uploaded to unstable, which caused the same build failure there (see attached bug watch). They solved it in a different way which was patching out the useage of python3-six all togheter. I've therefore filed bug 2070056 to get the package in sync again.

Thanks for review, and especially the root cause explanation :)

[Launchpad Janitor (janitor)]

This bug was fixed in the package gitsome - 0.8.0+ds-9.1

---------------
gitsome (0.8.0+ds-9.1) unstable; urgency=medium

  * Non-maintainer upload.
  * Patch-out usage of six (Closes: #1073371, LP: #2067196)

 -- Alexandre Detiste <email address hidden> Fri, 21 Jun 2024 09:03:27 +0200