On 21. 12. 22 11:40, Miro Hrončok wrote:
On 21. 12. 22 11:17, Florian Weimer wrote:
In Fedora, we have this:
/usr/lib/rpm/macros.d/macros.python:%python_sitelib %(RPM_BUILD_ROOT=
%{__python} -Esc "import sysconfig; print(sysconfig.get_path('purelib',
vars={'platbase': '%{_prefix}', 'base': '%{_prefix}'}))")
/usr/lib/rpm/macros.d/macros.python3:%python3_sitelib %(RPM_BUILD_ROOT=
%{__python3} -Ic "import sysconfig; print(sysconfig.get_path('purelib',
vars={'platbase': '%{_prefix}', 'base': '%{_prefix}'}))")
This is a %define-style macro, so the macro gets re-evaluated for every
expansion. It can make spec file operations really, really slow.
It's possible to work around this in spec files like this:
%{?python3_sitearch: %global python3_sitearch %{python3_sitearch}}
But this is quite ugly, and I wonder if there is a nice way to do it
directly in the macros file instead. I think I know how do it with Lua,
but maybe there is a better way?
This works (using random to demonstarte the behavior:
%_python3_random %(RPM_BUILD_ROOT= %{__python3} -Ic "import random;
print(random.randint(0,100))")
%python3_random %{?!_python3_random_cached:%{global _python3_random_cached
%_python3_random}}%_python3_random_cached
$ rpm --eval '%python3_random %python3_random %python3_random %python3_random
%python3_random'
42 42 42 42 42
Note that %python3_sitlib must be evaluated after Python is installed so maybe
there must be some "non-empty" conditional added as well.
This should do:
%_python3_random %(RPM_BUILD_ROOT= %{__python3} -Ic "import random; print(i if
(i := random.randint(0,100)) > 75 else '')")
%python3_random %["%?_python3_random_cached" == "" ? "%{global
_python3_random_cached %_python3_random}" : ""]%_python3_random_cached
$ rpm --eval '%python3_random %python3_random %python3_random %python3_random
%python3_random'
87 87
--
Miro Hrončok
--
Phone: +420777974800
IRC: mhroncok
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