def RegenerateFlags(options):
  """Given a parsed options object, and taking the environment variables into
  account, returns a list of flags that should regenerate an equivalent options
  object (even in the absence of the environment variables.)

  Any path options will be normalized relative to depth.

  The format flag is not included, as it is assumed the calling generator will
  set that as appropriate.
  """
  def FixPath(path):
    path = gyp.common.FixIfRelativePath(path, options.depth)
    if not path:
      return os.path.curdir
    return path

  def Noop(value):
    return value

  # We always want to ignore the environment when regenerating, to avoid
  # duplicate or changed flags in the environment at the time of regeneration.
  flags = ['--ignore-environment']
  for name, metadata in options._regeneration_metadata.iteritems():
    opt = metadata['opt']
    value = getattr(options, name)
    value_predicate = metadata['type'] == 'path' and FixPath or Noop
    action = metadata['action']
    env_name = metadata['env_name']
    if action == 'append':
      flags.extend(RegenerateAppendFlag(opt, value, value_predicate,
                                        env_name, options))
    elif ('store', None) in action:  # None is a synonym for 'store'.
      if value:
        flags.append(FormatOpt(opt, value_predicate(value)))
      elif options.use_environment and env_name and os.environ.get(env_name):
        flags.append(FormatOpt(opt, value_predicate(os.environ.get(env_name))))
    elif action in ('store_true', 'store_false'):
      if ((action == 'store_true' and value) or
          (action == 'store_false' and not value)):
        flags.append(opt)
      elif options.use_environment and env_name:
        print >>sys.stderr, ('Warning: environment regeneration unimplemented '
                             'for %s flag %r env_name %r' % (action, opt,
                                                             env_name))
    else:
      print >>sys.stderr, ('Warning: regeneration unimplemented for action %r '
                           'flag %r' % (action, opt))

  return flags
dataset/ETHPy150Open adobe/brackets-shell/gyp/pylib/gyp/__init__.py/RegenerateFlags/swapped operands of `in`