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nixpkgs/pkgs/games/stockfish/default.nix
2021-06-05 12:18:53 -07:00

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Nix

{ lib, stdenv, fetchurl }:
with lib;
let
# The x86-64-modern may need to be refined further in the future
# but stdenv.hostPlatform CPU flags do not currently work on Darwin
# https://discourse.nixos.org/t/darwin-system-and-stdenv-hostplatform-features/9745
archDarwin = if stdenv.isx86_64 then "x86-64-modern" else "x86-64";
arch = if stdenv.isDarwin then archDarwin else
if stdenv.isx86_64 then "x86-64" else
if stdenv.isi686 then "x86-32" else
if stdenv.isAarch64 then "armv8" else
"unknown";
version = "13";
nnueFile = "nn-62ef826d1a6d.nnue";
nnue = fetchurl {
name = nnueFile;
url = "https://tests.stockfishchess.org/api/nn/${nnueFile}";
sha256 = "0qsy9rr4zgxrpgwhwbi96z01a2560am2b00q2klbj4bd39nq5vv2";
};
in
stdenv.mkDerivation {
pname = "stockfish";
inherit version;
src = fetchurl {
url = "https://github.com/official-stockfish/Stockfish/archive/sf_${version}.tar.gz";
sha256 = "0qhxp2w543psanzhzn8jhfafx8aip57v9nsvafbwa5xynchlgl8m";
};
# This addresses a linker issue with Darwin
# https://github.com/NixOS/nixpkgs/issues/19098
preBuild = optionalString stdenv.isDarwin ''
sed -i.orig '/^\#\#\# 3.*Link Time Optimization/,/^\#\#\# 3/d' Makefile
'';
postUnpack = ''
sourceRoot+=/src
echo ${nnue}
cp "${nnue}" "$sourceRoot/${nnueFile}"
'';
makeFlags = [ "PREFIX=$(out)" "ARCH=${arch}" "CXX=${stdenv.cc.targetPrefix}c++" ];
buildFlags = [ "build" ];
enableParallelBuilding = true;
meta = {
homepage = "https://stockfishchess.org/";
description = "Strong open source chess engine";
longDescription = ''
Stockfish is one of the strongest chess engines in the world. It is also
much stronger than the best human chess grandmasters.
'';
maintainers = with maintainers; [ luispedro peti ];
platforms = ["x86_64-linux" "i686-linux" "x86_64-darwin" "aarch64-linux"];
license = licenses.gpl2;
};
}