quarkus.grpc.codegen.proto-directory unrecognized configuration key & missing from documentation

[LarsSven]

Describe the bug

The quarkus documentation refers to a property called quarkus.grpc.codegen.proto-directory in https://quarkus.io/guides/grpc-generation-reference#customizing-the-proto-directory. This property works as intended however it is not present in the https://quarkus.io/guides/all-config and if you use it in a Quarkus project, you get:

Unrecognized configuration key "quarkus.grpc.codegen.proto-directory" was provided; it will be ignored; verify that the dependency extension for this configuration is set or that you did not make a typo

Even though the property does work as intended.

Expected behavior

This property should be mentioned in the configuration documentation and I shouldn't get a warning when using it.

Actual behavior

I get a warning about it not recognizing the property, even though it is literally using the property (and if I remove the property my code breaks), and I cannot find it in the general configuration reference.

How to Reproduce?

1. Start a Quarkus gRPC project and set quarkus.grpc.codegen.proto-directory
2. Observe that this warning is thrown in the logs

Output of uname -a or ver

Ubuntu 25.04 6.14.0-15-generic

Output of java -version

openjdk version "21.0.7" 2025-04-15

Quarkus version or git rev

3.22.3

Build tool (ie. output of mvnw --version or gradlew --version)

Gradle 8.14.1

Additional information

No response

[quarkus-bot]

/cc @alesj (grpc), @cescoffier (grpc), @radcortez (config)