nixpkgs/pkgs/development/compilers/binaryen/default.nix


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{ stdenv, cmake, python, fetchFromGitHub, emscriptenRev ? null }:

let
  defaultVersion = "89";

  # Map from git revs to SHA256 hashes
  sha256s = {
    version_89 = "0rh1dq33ilq54szfgi1ajaiaj7rbylai02rhp9zm9vpwp0rw8mij";
    "1.38.28" = "172s7y5f38736ic8ri3mnbdqcrkadd40a26cxcfwbscc53phl11v";
  };
in

stdenv.mkDerivation rec {
  version = if emscriptenRev == null
            then defaultVersion
            else "emscripten-${emscriptenRev}";
  rev = if emscriptenRev == null
        then "version_${version}"
        else emscriptenRev;
  pname = "binaryen";

  src = fetchFromGitHub {
    owner = "WebAssembly";
    repo = "binaryen";
    sha256 =
      if builtins.hasAttr rev sha256s
      then builtins.getAttr rev sha256s
      else null;
    inherit rev;
  };

  nativeBuildInputs = [ cmake python ];

  meta = with stdenv.lib; {
    homepage = https://github.com/WebAssembly/binaryen;
    description = "Compiler infrastructure and toolchain library for WebAssembly, in C++";
    platforms = platforms.all;
    maintainers = with maintainers; [ asppsa ];
    license = licenses.asl20;
  };
}