Using deprecated Protobuf APIs

[y4n9squared]

I'm seeing many instances of

.venv/lib/python3.12/site-packages/protovalidate/internal/rules.py:863: DeprecationWarning: label() is deprecated. Use is_required() or is_repeated() instead.
    self._cache[descriptor] = self._new_rules(descriptor)

which stem from the fact that there are many accesses to FieldDescriptor.label which was deprecated in July 2025: https://protobuf.dev/news/2025-07-14/

These warnings start appearing when using the library with protobuf 6.x.

[stefanvanburen]

hey @y4n9squared — yeah, unfortunately that's expected; we support the protobuf runtime back to version 5, and I don't think those APIs are available to us until protobuf 6.x.

I imagine there's maybe a runtime check we could do to see if we're on protobuf>6 and use the appropriate APIs; open to contributions!