just_serve.proto: add Configuration service

This service allows to query the configuration of the just-serve
instance. In particular, it is used to double-check that the
associated remote end point is the same used by the interrogating
client.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/buildtool/serve_api/serve_service/just_serve.proto b/src/buildtool/serve_api/serve_service/just_serve.proto
index 06c60134..c6b805d2 100644
--- a/src/buildtool/serve_api/serve_service/just_serve.proto
+++ b/src/buildtool/serve_api/serve_service/just_serve.proto
@@ -206,3 +206,15 @@ service Target {
   // * `INTERNAL`: Internally, something is very broken.
   rpc ServeTargetVariables(ServeTargetVariablesRequest) returns (ServeTargetVariablesResponse) {}
 }
+
+message RemoteExecutionEndpointRequest {}
+
+message RemoteExecutionEndpointResponse {
+  string address = 1;
+}
+
+// This service can be used by the client to double check the server configuration
+service Configuration {
+  // Returns the address of the associated remote endpoint
+  rpc RemoteExecutionEndpoint(RemoteExecutionEndpointRequest) returns (RemoteExecutionEndpointResponse) {}
+}