docs: def _load_defaults(inventory_path=None, roles=None, extra_vars=None, tags=None,
                     basedir=False):
      """Load common defaults data structures.
  
      For factorization purpose."""
  
      extra_vars = extra_vars or {}
      tags = tags or []
      loader = DataLoader()
      if basedir:
          loader.set_basedir(basedir)
  
      inventory = EnosInventory(loader=loader,
                                sources=inventory_path, roles=roles)
  
      variable_manager = VariableManager(loader=loader,
                                         inventory=inventory)
  
      # seems mandatory to load group_vars variable
      if basedir:
          variable_manager.safe_basedir = True
  
      if extra_vars:
          variable_manager.extra_vars = extra_vars
  
      # NOTE(msimonin): The ansible api is "low level" in the
      # sense that we are redefining here all the default values
      # that are usually enforce by ansible called from the cli
      Options = namedtuple("Options", ["listtags", "listtasks",
                                       "listhosts", "syntax",
                                       "connection", "module_path",
                                       "forks", "private_key_file",
                                       "ssh_common_args",
                                       "ssh_extra_args",
                                       "sftp_extra_args",
                                       "scp_extra_args", "become",
                                       "become_method", "become_user",
                                       "remote_user", "verbosity",
                                       "check", "tags",
                                       "diff", "basedir"])
  
      options = Options(listtags=False, listtasks=False,
                        listhosts=False, syntax=False, connection="ssh",
                        module_path=None, forks=100,
                        private_key_file=None, ssh_common_args=None,
                        ssh_extra_args=None, sftp_extra_args=None,
                        scp_extra_args=None, become=None,
                        become_method="sudo", become_user="root",
                        remote_user=None, verbosity=2, check=False,
                        tags=tags, diff=None, basedir=basedir)
  
      return inventory, variable_manager, loader, options