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

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{ lib, stdenv, buildPythonPackage, isPyPy, fetchPypi, pytestCheckHook,
libffi, pkg-config, pycparser
}:
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if isPyPy then null else buildPythonPackage rec {
pname = "cffi";
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version = "1.15.0";
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src = fetchPypi {
inherit pname version;
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sha256 = "920f0d66a896c2d99f0adbb391f990a84091179542c205fa53ce5787aff87954";
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};
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outputs = [ "out" "dev" ];
buildInputs = [ libffi ];
nativeBuildInputs = [ pkg-config ];
propagatedBuildInputs = [ pycparser ];
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postPatch = lib.optionalString stdenv.isDarwin ''
# Remove setup.py impurities
substituteInPlace setup.py \
--replace "'-iwithsysroot/usr/include/ffi'" "" \
--replace "'/usr/include/ffi'," "" \
--replace '/usr/include/libffi' '${lib.getDev libffi}/include'
'';
# The tests use -Werror but with python3.6 clang detects some unreachable code.
NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang
"-Wno-unused-command-line-argument -Wno-unreachable-code -Wno-c++11-narrowing";
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# Lots of tests fail on aarch64-darwin due to "Cannot allocate write+execute memory":
# * https://cffi.readthedocs.io/en/latest/using.html#callbacks
doCheck = !stdenv.hostPlatform.isMusl && !(stdenv.isDarwin && stdenv.isAarch64);
checkInputs = [ pytestCheckHook ];
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meta = with lib; {
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maintainers = with maintainers; [ domenkozar lnl7 ];
homepage = "https://cffi.readthedocs.org/";
license = licenses.mit;
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description = "Foreign Function Interface for Python calling C code";
};
}