tree 0d7ee1713ad87c7f6a16af5012270e05b9d392cd
parent ef0b472f9157300bf0831acc5545b18a6c793f1f
author Wyatt Hepler <hepler@google.com> 1611944715 -0800
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1612201250 +0000

pw_protobuf_compiler: Support proto3 optional fields

proto3 now allows specifying optional fields. These fields behave
equivalently to proto2 optional fields and allow API users to detect
whether the field is present in the proto.

- Have the pw_rpc protoc plugins indicate proto3 optional field support.
- Require mypy-protobuf 1.24 or later for proto3 optional field support.
- Provide the flag for proto3 optional fields to protoc.

Change-Id: I66ba3a280cfc9b5c4d1ff42109a6e1d3d691b271
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/31320
Commit-Queue: Wyatt Hepler <hepler@google.com>
Reviewed-by: Alexei Frolov <frolv@google.com>