install_executables

# File lib/rubygems/commands/setup_command.rb, line 237
  def install_executables(bin_dir)
    @bin_file_names = []

    prog_mode = options[:prog_mode] || 0755

    executables = { 'gem' => 'bin' }
    executables['bundler'] = 'bundler/exe' if Gem::USE_BUNDLER_FOR_GEMDEPS
    executables.each do |tool, path|
      say "Installing #{tool} executable" if @verbose

      Dir.chdir path do
        bin_files = Dir['*']

        bin_files -= ]update_rubygems bundler bundle_ruby]

        bin_files.each do |bin_file|
          bin_file_formatted = if options[:format_executable]
                                 Gem.default_exec_format % bin_file
                               else
                                 bin_file
                               end

          dest_file = File.join bin_dir, bin_file_formatted
          bin_tmp_file = File.join Dir.tmpdir, "#{bin_file}.#{$$}"

          begin
            bin = File.readlines bin_file
            bin[0] = shebang

            File.open bin_tmp_file, 'w' do |fp|
              fp.puts bin.join
            end

            install bin_tmp_file, dest_file, :mode => prog_mode
            @bin_file_names << dest_file
          ensure
            rm bin_tmp_file
          end

          next unless Gem.win_platform?

          begin
            bin_cmd_file = File.join Dir.tmpdir, "#{bin_file}.bat"

            File.open bin_cmd_file, 'w' do |file|
              file.puts   @ECHO OFF  IF NOT "%~f0" == "~f0" GOTO :WinNT  @"#{File.basename(Gem.ruby).chomp('"')}" "#{dest_file}" %1 %2 %3 %4 %5 %6 %7 %8 %9  GOTO :EOF  :WinNT  @"#{File.basename(Gem.ruby).chomp('"')}" "%~dpn0" %*
            end

            install bin_cmd_file, "#{dest_file}.bat", :mode => prog_mode
          ensure
            rm bin_cmd_file
          end
        end
      end
    end
  end