[BUG] Bazel 9 compatibility issues

[ash2k]

Description

I'm trying to build my project, that uses protovalidate, with Bazel 9.

Steps to Reproduce

Expected Behavior

Successful build.

Actual Behavior

The build is failing:

bazel test -- //...
ERROR: .../external/protovalidate+/proto/protovalidate/buf/validate/BUILD.bazel:39:1: name 'cc_proto_library' is not defined (did you mean 'proto_library'?)
ERROR: .../external/protovalidate+/proto/protovalidate/buf/validate/BUILD.bazel: no such target '@@protovalidate+//proto/protovalidate/buf/validate:validate_proto': target 'validate_proto' not declared in package 'proto/protovalidate/buf/validate' defined by .../external/protovalidate+/proto/protovalidate/buf/validate/BUILD.bazel
ERROR: /Users/mike/src/gitlab-agent/pkg/agentcfg/BUILD.bazel:7:18: no such target '@@protovalidate+//proto/protovalidate/buf/validate:validate_proto': target 'validate_proto' not declared in package 'proto/protovalidate/buf/validate' defined by .../external/protovalidate+/proto/protovalidate/buf/validate/BUILD.bazel and referenced by '//pkg/agentcfg:proto'

Screenshots/Logs

Environment

• Operating System:
• Version:
• Compiler/Toolchain:
• Protobuf Compiler & Version:
• Protovalidate Version:

Possible Solution

As the error says, cc_proto_library is not imported properly. It used to be a built-in rule but that is no longer the case with Bazel 9. It must be imported from here.

Additional Context

Ideally this project should switch from the deprecated rules_proto to protobuf. This would make it possible to use pre-built protoc too.