completion.py 文件源码

def Init(pool, builtins, mem, funcs, comp_lookup, status_out, ev):

  aliases_action = WordsAction(['TODO:alias'])
  commands_action = ExternalCommandAction(mem)
  builtins_action = WordsAction(builtins.GetNamesToComplete())
  keywords_action = WordsAction(['TODO:keywords'])
  funcs_action = LiveDictAction(funcs)

  first_chain = ChainedCompleter([
      aliases_action, commands_action, builtins_action, keywords_action,
      funcs_action
  ])

  # NOTE: These two are the same by default
  comp_lookup.RegisterEmpty(first_chain)
  comp_lookup.RegisterFirst(first_chain)

  # NOTE: Need set_completer_delims to be space here?  Otherwise you complete
  # as --a and --n.  Why?
  comp_lookup.RegisterName('__default__', WordsAction(['-a', '-n']))

  A1 = WordsAction(['foo.py', 'foo', 'bar.py'])
  A2 = WordsAction(['m%d' % i for i in range(5)], delay=0.1)
  C1 = ChainedCompleter([A1, A2])
  comp_lookup.RegisterName('grep', C1)

  var_comp = VarAction(os.environ, mem)
  root_comp = RootCompleter(pool, ev, comp_lookup, var_comp)

  complete_cb = ReadlineCompleter(root_comp, status_out)
  InitReadline(complete_cb)