if not self.context.target_roots and not self.get_options().enable_v2_engine:
 -      logger.warn('The behavior of `./pants {0}` (no explicit targets) will soon become a no-op. '
 -                  'To remove this warning, please specify one or more explicit target specs (e.g. '
 -                  '`./pants {0} ::`).'.format(goal_name))