nixpkgs/pkgs/development/libraries/nlohmann_json/default.nix

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{ stdenv, fetchFromGitHub, cmake
, hostPlatform
}:
stdenv.mkDerivation rec {
name = "nlohmann_json-${version}";
version = "3.1.2";
src = fetchFromGitHub {
owner = "nlohmann";
repo = "json";
rev = "v${version}";
sha256 = "1mpr781fb2dfbyscrr7nil75lkxsazg4wkm749168lcf2ksrrbfi";
};
nativeBuildInputs = [ cmake ];
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doCheck = stdenv.buildPlatform == stdenv.hostPlatform;
checkTarget = "test";
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enableParallelBuilding = true;
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cmakeFlags = [
"-DBuildTests=${if doCheck then "ON" else "OFF"}"
] ++ stdenv.lib.optionals (hostPlatform.libc == "msvcrt") [
"-DCMAKE_SYSTEM_NAME=Windows"
];
meta = with stdenv.lib; {
description = "Header only C++ library for the JSON file format";
homepage = https://github.com/nlohmann/json;
license = licenses.mit;
platforms = platforms.all;
};
}