retroarch: refactor wrapper to use symlinkJoin

    mainProgram = "retroarch";

    # FIXME: error while building in macOS:

    # "Undefined symbols for architecture <arch>"

    # See also retroarch/wrapper.nix that is also broken in macOS

    broken = stdenv.isDarwin;

  };

}

{ stdenv, lib, makeWrapper, retroarch, cores ? [ ] }:

stdenv.mkDerivation {

  pname = "retroarch";

  version = lib.getVersion retroarch;

{ lib

, stdenv

, makeWrapper

, retroarch

, symlinkJoin

, cores ? [ ]

}:

let

  coresPath = lib.lists.unique (map (c: c.libretroCore) cores);

  wrapperArgs = lib.strings.escapeShellArgs

    (lib.lists.flatten

      (map (corePath: [ "--add-flags" "-L ${placeholder "out" + corePath}" ]) coresPath));

in

symlinkJoin {

  name = "retroarch-with-cores-${lib.getVersion retroarch}";

  paths = [ retroarch ] ++ cores;

  nativeBuildInputs = [ makeWrapper ];

  buildCommand = ''

    mkdir -p $out/lib

    for coreDir in $cores; do

      ln -s $coreDir/* $out/lib/.

    done

    ln -s -t $out ${retroarch}/share

    if [ -d ${retroarch}/Applications ]; then

      ln -s -t $out ${retroarch}/Applications

    fi

  passthru = {

    inherit cores;

    unwrapped = retroarch;

  };

  postBuild = ''

    # remove core specific binaries

    find $out/bin -name 'retroarch-*' -delete

    # wrapProgram can't operate on symlinks

    rm $out/bin/retroarch

    makeWrapper ${retroarch}/bin/retroarch $out/bin/retroarch \

      --suffix-each LD_LIBRARY_PATH ':' "$cores" \

      --add-flags "-L $out/lib/" \

      ${wrapperArgs}

  '' + lib.optionalString stdenv.isDarwin ''

    # wrapProgram can't operate on symlinks

    rm $out/Applications/RetroArch.app/Contents/MacOS/retroarch

    makeWrapper ${retroarch}/bin/retroarch $out/Applications/RetroArch.app/Contents/MacOS/retroarch \

      ${wrapperArgs}

  '';

  cores = map (x: x + x.libretroCore) cores;

  preferLocalBuild = true;

  meta = with retroarch.meta; {

    inherit changelog description homepage license maintainers platforms;

    longDescription = ''

      RetroArch is the reference frontend for the libretro API.

      The following cores are included:

      ${lib.concatStringsSep "\n" (map (x: "  - ${x.name}") cores)}

    ''

    + lib.optionalString (cores != [ ]) ''

      The following cores are included: ${lib.concatStringsSep ", " (map (x: x.core) cores)}

    '';

    # FIXME: exit with error on macOS:

    # No Info.plist file in application bundle or no NSPrincipalClass in the Info.plist file, exiting

    broken = stdenv.isDarwin;

    mainProgram = "retroarch";

  };

}