Bug#1061357: python3-spglib: spglib python package not identified by dh_python3

[Drew Parsons]

Package: python3-spglib
Version: 2.2.0-2
Severity: normal

We have dh_python3 to help automatically identify python package
dependencies when building a package.

It's unable to identify spglib, however. For instance a pymatgen build
log shows
   dh_python3 -a -O--buildsystem=pybuild
I: dh_python3 pydist:302: Cannot find package that provides spglib. Please add package that provides it to Build-Depends or add "spglib python3-spglib" line to debian/py3dist-overrides or add proper dependency to Depends by hand and ignore this info.

I'm not sure exactly why dh_python3 can't identify it. I would have
thought it could find out which package provides
/usr/lib/python3/dist-packages/spglib.  But it's not doing that. Maybe
it's a bug in dh-python.

But I notice that python3-spglib doesn't provide the .dist-info
directory that most other python packages provide.  I guess dh-python
is using the dist-info mechanism to identify packages. Perhaps we
should file a bug against dh-python for it to run something like
"dpkg -S /usr/lib/python3/dist-packages/<pymodule>" if it doesn't find
a dist-info entry.

In the meantime, I figure spglib's lack of dist-info occurs because
it's a cmake build rather than a python setuptools build, in which
case the problem sits alongside Bug#1061263.


-- System Information:
Debian Release: trixie/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.6.9-amd64 (SMP w/8 CPU threads; PREEMPT)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8), LANGUAGE=en_AU:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages python3-spglib depends on:
ii  libc6          2.37-13
ii  libsymspg2     2.2.0-2
ii  python3        3.11.6-1
ii  python3-numpy  1:1.24.2-2

python3-spglib recommends no packages.

python3-spglib suggests no packages.

-- no debconf information