git.TagReference.tag might be None, which causes AttributeError

[Suor]

The stacktrace (read from bottom):

AttributeError: 'NoneType' object has no attribute 'tagged_date'
  File "celery/app/base.py", line 487, in run
    return task._orig_run(*args, **kwargs)
  File "funcy/decorators.py", line 45, in wrapper
    return deco(call, *dargs, **dkwargs)
  File "repos/exceptions.py", line 41, in wrap_provider_outage
    return call()
  File "funcy/decorators.py", line 66, in __call__
    return self._func(*self._args, **self._kwargs)
  File "contextlib.py", line 79, in inner
    return func(*args, **kwds)
  File "funcy/decorators.py", line 45, in wrapper
    return deco(call, *dargs, **dkwargs)
  File "viewer/logger.py", line 75, in deco
    return call()
  File "funcy/decorators.py", line 66, in __call__
    return self._func(*self._args, **self._kwargs)
  File "repos/tasks/repos.py", line 73, in parse_repo
    _parse_repo_or_slice(self, repo)
  File "repos/tasks/repos.py", line 106, in _parse_repo_or_slice
    raise e
  File "repos/tasks/repos.py", line 89, in _parse_repo_or_slice
    _parse_repo(self, repo)
  File "repos/tasks/repos.py", line 138, in _parse_repo
    parse_local_repo(repo, dirname)
  File "repos/parsing/__init__.py", line 49, in parse_local_repo
    _parse_repo(repo_obj, dirname, attrs, dvc=True)
  File "repos/parsing/__init__.py", line 153, in _parse_repo
    parse_gto(repo_obj, path, [], to_upd)
  File "contextlib.py", line 79, in inner
    return func(*args, **kwds)
  File "repos/parsing/gto.py", line 34, in parse_gto
    gto_information[tag] = check_ref(str(path), tag)
  File "gto/api.py", line 154, in check_ref
    result = reg.check_ref(ref)
  File "gto/registry.py", line 231, in check_ref
    "version": self.version_manager.check_ref(ref, self.get_state()),
  File "gto/registry.py", line 58, in get_state
    state = self.version_manager.update_state(state)
  File "gto/tag.py", line 265, in update_state
    tags = [parse_tag(t) for t in find(repo=self.repo, action=self.actions)]
  File "gto/tag.py", line 180, in find
    tags = sorted(tags, key=lambda t: t.tag.tagged_date)
  File "gto/tag.py", line 180, in <lambda>
    tags = sorted(tags, key=lambda t: t.tag.tagged_date)

Sentry issue

[aguschin]

Thanks. This is due to those git tags being lightweight. GTO doesn't work with them since they don't contain a tagger, date, an annotation message and are intended for the local usage. So I'm filtering them out for now.

For the reference, see the discussion here #127

[Suor]

Thanks.