Our Pythons currently patches distutils to install packages to
/usr/lib(64)/pythonX.Y/site-packages when the $RPM_BUILD_ROOT environment
variable is set (and to /usr/local/lib(64)/pythonX.Y/site-packages otherwise).
With the deprecation of distutils [1] we want to change the patch to create
and use a different sysconfig install scheme [2].
However, we have realized that macros defined as %(%{__python3} ...) don't
"see" the environment variables set by rpmbuild because they are expanded earlier
and hence e.g. %{python3_sitelib} evaluates to
/usr/local/lib/python3.X/site-packages -- which is not desired.
To be able to reliably detect an RPM build environment by checking
the presence of the $RPM_BUILD_ROOT environment variable,
we manually set it in the macro definitions.
Since %{buildroot} in not fully populated
(e.g. it can expand literally to
/home/anna/rpmbuild/BUILDROOT/%{NAME}-%{VERSION}-%{RELEASE}.x86_64),
we don't use it here.
The variable simply needs to present in the environment.
See also the analysis of the build failures when this is not done [3].
[1] https://www.python.org/dev/peps/pep-0632/
[2] https://bugs.python.org/issue43976
[3] https://src.fedoraproject.org/rpms/python3.10/pull-request/63#comment-79042
Related: rhbz#1950291
With $PATH and $PYTHONPATH set to the %buildroot,
the macro tries to import the given Python 3 module(s).
Useful as a smoke test in %check when ruining tests is not feasible.
Accepts spaces or commas as separators.
Package python-six:
%check
%py3_check_import six
Executing(%check): ...
...
+ PATH=...
+ PYTHONPATH=...
+ PYTHONDONTWRITEBYTECODE=1
+ /usr/bin/python3 -c 'import six'
+ RPM_EC=0
++ jobs -p
+ exit 0
%py3_check_import six seven
...
+ /usr/bin/python3 -c 'import six, seven'
Traceback (most recent call last):
File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'seven'
error: Bad exit status from ... (%check)
...
%py3_check_import five, six, seven
+ /usr/bin/python3 -c 'import five, six, seven'
Traceback (most recent call last):
File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'five'
error: Bad exit status from ... (%check)
Package python-packaging:
%py3_check_import packaging, packaging.markers packaging.requirements, packaging.tags
Executing(%check): ...
...
+ PATH=...
+ PYTHONPATH=...
+ PYTHONDONTWRITEBYTECODE=1
+ /usr/bin/python3 -c 'import packaging, packaging.markers, packaging.requirements, packaging.tags'
+ RPM_EC=0
++ jobs -p
+ exit 0
%py3_check_import packaging, packaging.markers packaging.notachance, packaging.tags
...
+ /usr/bin/python3 -c 'import packaging, packaging.markers, packaging.notachance, packaging.tags'
Traceback (most recent call last):
File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'packaging.notachance'
error: Bad exit status from ... (%check)
Related: rhbz#1950291
Distutils which were used to define the macros are deprecated in Python3.10:
https://www.python.org/dev/peps/pep-0632/.
Sysconfig isn't and it works across our Pythons, making it better choice for the task.
Related: rhbz#1950291
