class DEBUGGER__::Session

def resolve_path file
  File.realpath(File.expand_path(file))
rescue Errno::ENOENT
  case file
  when '-e', '-'
    return file
  else
    $LOAD_PATH.each do |lp|
      libpath = File.join(lp, file)
      return File.realpath(libpath)
    rescue Errno::ENOENT
      # next
    end
  end
  raise
end