nixpkgs/pkgs/development/python-modules/mpi4py/default.nix

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{ stdenv, fetchPypi, fetchpatch, python, buildPythonPackage, mpi, openssh }:
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buildPythonPackage rec {
pname = "mpi4py";
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version = "3.0.1";
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src = fetchPypi {
inherit pname version;
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sha256 = "0ld8rjmsjr0dklvj2g1gr3ax32sdq0xjxyh0cspknc1i36waajb5";
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};
passthru = {
inherit mpi;
};
patches = [ ( fetchpatch {
# Upstream patch to ensure compatibility with openmpi-4.0.1
url = "https://github.com/mpi4py/mpi4py/commit/42f5e35a6a90454516c11131549a08cd766edbb0.patch";
sha256 = "1dm0i3amwj1cddzz1m9ssd7qp655c8rv1wzjs9ww3kzd90fm4w72";
})];
postPatch = ''
substituteInPlace test/test_spawn.py --replace \
"unittest.skipMPI('openmpi(<3.0.0)')" \
"unittest.skipMPI('openmpi')"
'';
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configurePhase = "";
installPhase = ''
mkdir -p "$out/lib/${python.libPrefix}/site-packages"
export PYTHONPATH="$out/lib/${python.libPrefix}/site-packages:$PYTHONPATH"
${python}/bin/${python.executable} setup.py install \
--install-lib=$out/lib/${python.libPrefix}/site-packages \
--prefix="$out"
# --install-lib:
# sometimes packages specify where files should be installed outside the usual
# python lib prefix, we override that back so all infrastructure (setup hooks)
# work as expected
# Needed to run the tests reliably. See:
# https://bitbucket.org/mpi4py/mpi4py/issues/87/multiple-test-errors-with-openmpi-30
export OMPI_MCA_rmaps_base_oversubscribe=yes
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'';
setupPyBuildFlags = ["--mpicc=${mpi}/bin/mpicc"];
nativeBuildInputs = [ mpi openssh ];
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meta = {
description =
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"Python bindings for the Message Passing Interface standard";
homepage = http://code.google.com/p/mpi4py/;
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license = stdenv.lib.licenses.bsd3;
};
}