{ lib, buildPythonPackage, fetchFromGitHub, cython, setuptools, mpi, toPythonModule, pytest, mpiCheckPhaseHook, mpi4py, mpich, }: buildPythonPackage rec { pname = "mpi4py"; version = "4.1.0"; pyproject = true; src = fetchFromGitHub { repo = "mpi4py"; owner = "mpi4py"; tag = version; hash = "sha256-Hm+x79utOrjAbprud2MECgakyOzgShSwNuoyZUcTluQ="; }; build-system = [ cython setuptools ]; nativeBuildInputs = [ mpi ]; dependencies = [ # Use toPythonModule so that also the mpi executables will be propagated to # generated Python environment. (toPythonModule mpi) ]; pythonImportsCheck = [ "mpi4py" ]; nativeCheckInputs = [ pytest mpiCheckPhaseHook ]; __darwinAllowLocalNetworking = true; # skip spawn related tests for openmpi implemention # see https://github.com/mpi4py/mpi4py/issues/545#issuecomment-2343011460 env.MPI4PY_TEST_SPAWN = if mpi.pname == "openmpi" then 0 else 1; # follow upstream's checkPhase # see https://github.com/mpi4py/mpi4py/blob/4.1.0/.github/workflows/ci-test.yml#L92-L95 checkPhase = '' runHook preCheck echo 'Testing mpi4py (np=1)' mpiexec -n 1 python test/main.py -v echo 'Testing mpi4py (np=2)' mpiexec -n 2 python test/main.py -v -f -e spawn runHook postCheck ''; passthru = { inherit mpi; tests = { mpich = mpi4py.override { mpi = mpich; }; }; }; meta = { description = "Python bindings for the Message Passing Interface standard"; homepage = "https://github.com/mpi4py/mpi4py"; changelog = "https://github.com/mpi4py/mpi4py/blob/${src.tag}/CHANGES.rst"; license = lib.licenses.bsd2; maintainers = with lib.maintainers; [ doronbehar ]; }; }