code: def save_traceback(err):
      
      # Store logs to ~/.bootstrapper directory
      dirname = safe_path(os.path.expanduser(
          os.path.join('~', '.{0}'.format(__script__))
      ))
  
      # But ensure that directory exists
      if not os.path.isdir(dirname):
          os.mkdir(dirname)
  
      # Now we ready to put traceback to log file
      filename = os.path.join(dirname, '{0}.log'.format(__script__))
  
      with open(filename, 'a+') as handler:
          traceback.print_exc(file=handler)
  
      # And show colorized message
      message = ('User aborted workflow'
                 if isinstance(err, KeyboardInterrupt)
                 else 'Unexpected error catched')
      print_error(message)
      print_error('Full log stored to {0}'.format(filename), False)
  
      return True
docs: Save error traceback to bootstrapper log file.
  
      :param err: Catched exception.