just serve: Add request to report compatibility status of endpoint

This request is needed by just-mr in order to verify that it can
use a provided serve endpoint when setting up the repository roots.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/buildtool/serve_api/remote/configuration_client.cpp b/src/buildtool/serve_api/remote/configuration_client.cpp
index ae5aa3ba..032e548f 100644
--- a/src/buildtool/serve_api/remote/configuration_client.cpp
+++ b/src/buildtool/serve_api/remote/configuration_client.cpp
@@ -87,3 +87,16 @@ auto ConfigurationClient::CheckServeRemoteExecution() -> bool {
         client_msg);
     return false;
 }
+
+auto ConfigurationClient::IsCompatible() -> std::optional<bool> {
+    grpc::ClientContext context;
+    justbuild::just_serve::CompatibilityRequest request{};
+    justbuild::just_serve::CompatibilityResponse response{};
+    grpc::Status status = stub_->Compatibility(&context, request, &response);
+
+    if (not status.ok()) {
+        LogStatus(&logger_, LogLevel::Error, status);
+        return std::nullopt;
+    }
+    return response.compatible();
+}