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.

Hi,

I think both #1061263 and #1061357 could be solved by switching spglib's
buildsystem to one based on scikit-build-core, as its pyproject.toml
supports that.

Andrius

Hi,

I made an attempt to build spglib with scikit-build-core by specifying
'--buildsystem pybuild' in debian/rules, adding the required build
dependencies and patching pyproject.toml to run tests for Python. As
expected, spglib is built for all supported Python versions. Shared
libraries are built as well, but they are built for every supported
Python version separately and are different (at least of same size).
Fortran interface does not get built at all.

So the buildsystem could be switched, possibly resolving both #1061263
and #1061357, but with the price of losing Fortran interface and strange
issue with different shared libraries (maybe just an unreproducible build).

Best,
Andrius

Hi,

I have uploaded spglib 2.2.0-3 with sort of dual buildsystem where
python package is built by pybuild. Thus now dist-info is present in the
binary package. I did not close this bug as I have not attempted to
rebuilt pymatgen yet. If you do and find the "Cannot find package that
provides spglib" message gone, please close this bug.

Best,
Andrius