nixpkgs/pkgs/stdenv/darwin/stdenv-bootstrap-tools.nix

{
  lib,
  stdenv,
  bash,
  bzip2,
  coreutils,
  cpio,
  curlMinimal,
  darwin,
  diffutils,
  dumpnar,
  findutils,
  gawk,
  gettext,
  gmpxx,
  gnugrep,
  gnumake,
  gnused,
  gnutar,
  gzip,
  ld64,
  libffi,
  libiconv,
  libxml2,
  libyaml,
  llvmPackages,
  ncurses,
  nukeReferences,
  openssl,
  patch,
  pbzx,
  runCommand,
  writeText,
  xar,
  xz,
  zlib,
}:
stdenv.mkDerivation (finalAttrs: {
  name = "stdenv-bootstrap-tools";

  nativeBuildInputs = [
    dumpnar
    nukeReferences
  ];

  buildCommand =
    let
      inherit (lib) getBin getDev getLib;

      coreutils_ =
        (coreutils.override (prevArgs: {
          # We want coreutils without ACL support.
          aclSupport = false;
          # Cannot use a single binary build, or it gets dynamically linked against gmp.
          singleBinary = false;
        })).overrideAttrs
          (prevAttrs: {
            # Increase header size to be able to inject extra RPATHs. Otherwise
            # x86_64-darwin build fails as:
            #    https://cache.nixos.org/log/g5wyq9xqshan6m3kl21bjn1z88hx48rh-stdenv-bootstrap-tools.drv
            NIX_LDFLAGS = (prevAttrs.NIX_LDFLAGS or "") + " -headerpad_max_install_names";
          });

      # Avoid messing with libkrb5 and libnghttp2.
      curl_ = curlMinimal.override (prevArgs: {
        gssSupport = false;
        http2Support = false;
        scpSupport = false;
      });

      unpackScript = writeText "bootstrap-tools-unpack.sh" ''
        set -euo pipefail

        echo Unpacking the bootstrap tools... >&2
        mkdir $out
        tar xf "$1" -C $out

        updateInstallName() {
          local path="$1"

          cp "$path" "$path.new"
          install_name_tool -id "$path" "$path.new"
          codesign -f -i "$(basename "$path")" -s - "$path.new"
          mv -f "$path.new" "$path"
        }

        find $out/lib -type f -name '*.dylib' -print0 | while IFS= read -r -d $'\0' lib; do
          updateInstallName "$lib"
        done

        # as is a wrapper around clang. need to replace the nuked store paths
        sed -i 's|/.*/bin/|'"$out"'/bin/|' $out/bin/as

        # Provide a gunzip script.
        cat > $out/bin/gunzip <<EOF
        #!$out/bin/sh
        exec $out/bin/gzip -d "\$@"
        EOF
        chmod +x $out/bin/gunzip

        # Provide fgrep/egrep.
        echo "#! $out/bin/sh" > $out/bin/egrep
        echo "exec $out/bin/grep -E \"\$@\"" >> $out/bin/egrep
        echo "#! $out/bin/sh" > $out/bin/fgrep
        echo "exec $out/bin/grep -F \"\$@\"" >> $out/bin/fgrep

        cat >$out/bin/dsymutil << EOF
        #!$out/bin/sh
        EOF

        chmod +x $out/bin/egrep $out/bin/fgrep $out/bin/dsymutil
      '';

    in
    ''
      mkdir -p $out/bin $out/lib $out/lib/darwin

      ${lib.optionalString stdenv.targetPlatform.isx86_64 ''
        # Copy libSystem's .o files for various low-level boot stuff.
        cp -d ${getLib darwin.Libsystem}/lib/*.o $out/lib

        # Resolv is actually a link to another package, so let's copy it properly
        cp -L ${getLib darwin.Libsystem}/lib/libresolv.9.dylib $out/lib
      ''}

      cp -rL ${getDev darwin.Libsystem}/include $out
      chmod -R u+w $out/include
      cp -rL ${getDev libiconv}/include/* $out/include
      cp -rL ${getDev gnugrep.pcre2}/include/* $out/include
      mv $out/include $out/include-Libsystem

      # Copy binutils.
      for i in as ld ar ranlib nm strip otool install_name_tool lipo codesign_allocate; do
        cp ${getBin darwin.binutils-unwrapped}/bin/$i $out/bin
      done
      cp -d ${getLib ld64}/lib/libcodedirectory*.dylib $out/lib

      # Copy coreutils, bash, etc.
      cp ${getBin coreutils_}/bin/* $out/bin
      (cd $out/bin && rm vdir dir sha*sum pinky factor pathchk runcon shuf who whoami shred users)

      cp -d ${getBin bash}/bin/{ba,}sh $out/bin
      cp -d ${getBin diffutils}/bin/* $out/bin
      cp ${getBin findutils}/bin/{find,xargs} $out/bin
      cp -d ${getBin gawk}/bin/{g,}awk $out/bin
      cp -d ${getBin gnugrep}/bin/grep $out/bin
      cp -d ${getBin gnumake}/bin/* $out/bin
      cp -d ${getBin gnused}/bin/* $out/bin
      cp -d ${getBin patch}/bin/* $out/bin

      cp -d ${getLib gettext}/lib/libintl*.dylib $out/lib
      cp -d ${getLib gnugrep.pcre2}/lib/libpcre2*.dylib $out/lib
      cp -d ${getLib libiconv}/lib/lib*.dylib $out/lib
      cp -d ${getLib libxml2}/lib/libxml2*.dylib $out/lib
      cp -d ${getLib ncurses}/lib/libncurses*.dylib $out/lib

      # copy package extraction tools
      cp -d ${getBin bzip2}/bin/b{,un}zip2 $out/bin
      cp ${getBin cpio}/bin/cpio $out/bin
      cp ${getBin gnutar}/bin/tar $out/bin
      cp ${getBin gzip}/bin/.gzip-wrapped $out/bin/gzip
      cp ${getBin pbzx}/bin/pbzx $out/bin
      cp ${getBin xz}/bin/xz $out/bin
      cp -d ${getLib bzip2}/lib/libbz2*.dylib $out/lib
      cp -d ${getLib gmpxx}/lib/libgmp*.dylib $out/lib
      cp -d ${getLib xar}/lib/libxar*.dylib $out/lib
      cp -d ${getLib xz}/lib/liblzma*.dylib $out/lib
      cp -d ${getLib zlib}/lib/libz*.dylib $out/lib

      # This used to be in-nixpkgs, but now is in the bundle
      # because I can't be bothered to make it partially static
      cp ${getBin curl_}/bin/curl $out/bin
      cp -d ${getLib curl_}/lib/libcurl*.dylib $out/lib
      cp -d ${getLib openssl}/lib/*.dylib $out/lib

      # Copy what we need of clang
      cp -d ${getBin llvmPackages.clang-unwrapped}/bin/clang{,++,-cl,-cpp,-[0-9]*} $out/bin
      cp -d ${getLib llvmPackages.clang-unwrapped}/lib/libclang-cpp*.dylib $out/lib
      cp -rd ${getLib llvmPackages.clang-unwrapped}/lib/clang $out/lib

      cp -d ${getLib llvmPackages.libcxx}/lib/libc++*.dylib $out/lib
      mkdir -p $out/lib/darwin
      cp -d ${getLib llvmPackages.compiler-rt}/lib/darwin/libclang_rt.{,profile_}osx.a  $out/lib/darwin
      cp -d ${getLib llvmPackages.compiler-rt}/lib/libclang_rt.{,profile_}osx.a $out/lib
      cp -d ${getLib llvmPackages.llvm}/lib/libLLVM.dylib $out/lib
      cp -d ${getLib libffi}/lib/libffi*.dylib $out/lib

      mkdir $out/include
      cp -rd ${getDev llvmPackages.libcxx}/include/c++ $out/include

      # copy .tbd assembly utils
      cp ${getBin darwin.rewrite-tbd}/bin/rewrite-tbd $out/bin
      cp -d ${getLib libyaml}/lib/libyaml*.dylib $out/lib

      # copy sigtool
      cp -d ${getBin darwin.sigtool}/bin/{codesign,sigtool} $out/bin

      cp -d ${getLib darwin.libtapi}/lib/libtapi*.dylib $out/lib

      # tools needed to unpack bootstrap archive
      mkdir -p unpack/bin unpack/lib
      cp -d ${getBin bash}/bin/{bash,sh} unpack/bin
      cp ${getBin coreutils_}/bin/mkdir unpack/bin
      cp ${getBin gnutar}/bin/tar unpack/bin
      cp ${getBin xz}/bin/xz unpack/bin
      cp -d ${getLib gettext}/lib/libintl*.dylib unpack/lib
      cp -d ${getLib libiconv}/lib/lib*.dylib unpack/lib
      cp -d ${getLib xz}/lib/liblzma*.dylib unpack/lib
      cp ${unpackScript} unpack/bootstrap-tools-unpack.sh

      #
      # All files copied. Perform processing to update references to point into
      # the archive
      #

      chmod -R u+w $out unpack

      # - change nix store library paths to use @rpath/library
      # - if needed add an rpath containing lib/
      # - strip executable
      rpathify() {
        local libs=$(${stdenv.cc.targetPrefix}otool -L "$1" | tail -n +2 | grep -o "$NIX_STORE.*-\S*" || true)
        local lib rpath
        for lib in $libs; do
          ${stdenv.cc.targetPrefix}install_name_tool -change $lib "@rpath/$(basename "$lib")" "$1"
        done

        case "$(dirname "$1")" in
        */bin)
          # Strip executables even further
          ${stdenv.cc.targetPrefix}strip "$i"
          rpath='@executable_path/../lib'
          ;;
        */lib)
          # the '/.' suffix is required
          rpath='@loader_path/.'
          ;;
        */lib/darwin)
          rpath='@loader_path/..'
          ;;
        *)
          echo unkown executable $1 >&2
          exit 1
          ;;
        esac

        # if shared object contains references add an rpath to lib/
        if ${stdenv.cc.targetPrefix}otool -l "$1"| grep -q '@rpath/'; then
          ${stdenv.cc.targetPrefix}install_name_tool -add_rpath "$rpath" "$1"
        fi
      }

      # check that linked library paths exist in lib
      # must be run after rpathify is performed
      checkDeps() {
        local deps=$(${stdenv.cc.targetPrefix}otool -l "$1"| grep -o '@rpath/[^      ]*' || true)
        local lib
        shopt -s extglob
        for lib in $deps; do
          local root="''${1/\/@(lib|bin)\/*}"
          if [[ ! -e $root/''${lib/@rpath/lib} ]]; then
            echo "error: $1 missing lib for $lib" >&2
            exit 1
          fi
        done
        shopt -u extglob
      }

      for i in {unpack,$out}/bin/* {unpack,$out}/lib{,/darwin}/*.dylib; do
        if [[ ! -L $i ]] && isMachO "$i"; then
          rpathify "$i"
          checkDeps "$i"
        fi
      done

      nuke-refs {unpack,$out}/bin/*
      nuke-refs {unpack,$out}/lib/*
      nuke-refs $out/lib/darwin/*

      mkdir $out/.pack
      mv $out/* $out/.pack
      mv $out/.pack $out/pack

      mkdir $out/on-server
      cp -r unpack $out

      XZ_OPT="-9 -T $NIX_BUILD_CORES" tar cvJf $out/on-server/bootstrap-tools.tar.xz \
        --hard-dereference --sort=name --numeric-owner --owner=0 --group=0 --mtime=@1 -C $out/pack .
      dumpnar $out/unpack | xz -9 -T $NIX_BUILD_CORES > $out/on-server/unpack.nar.xz
    '';

  allowedReferences = [ ];

  passthru = {
    bootstrapFiles = {
      bootstrapTools = "${finalAttrs.finalPackage}/on-server/bootstrap-tools.tar.xz";
      unpack = runCommand "unpack" { allowedReferences = [ ]; } ''
        cp -r ${finalAttrs.finalPackage}/unpack $out
      '';
    };
  };

  meta = {
    maintainers = [ lib.maintainers.copumpkin ];
  };
})