extract_tar_gz

# File lib/rubygems/package.rb, line 362
  def extract_tar_gz io, destination_dir, pattern = "*" # :nodoc:
    open_tar_gz io do |tar|
      tar.each do |entry|
        next unless File.fnmatch pattern, entry.full_name, File::FNM_DOTMATCH

        destination = install_location entry.full_name, destination_dir

        FileUtils.rm_rf destination

        mkdir_options = {}
        mkdir_options[:mode] = entry.header.mode if entry.directory?
        mkdir =
          if entry.directory? then
            destination
          else
            File.dirname destination
          end

        mkdir_p_safe mkdir, mkdir_options, destination_dir, entry.full_name

        open destination, 'wb' do |out|
          out.write entry.read
          FileUtils.chmod entry.header.mode, destination
        end if entry.file?

        File.symlink(entry.header.linkname, destination) if entry.symlink?

        verbose destination
      end
    end
  end