Add grpc reflections

Signed-off-by: Nikolai Rodionov <allanger@badhouseplants.net>

Cargo.lock

@@ -477,6 +477,7 @@ dependencies = [
  "tokio",
  "tonic",
  "tonic-prost",
+ "tonic-reflection",
 ]
 
 [[package]]
@@ -1696,6 +1697,20 @@ dependencies = [
  "tonic-build",
 ]
 
+[[package]]
+name = "tonic-reflection"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34da53e8387581d66db16ff01f98a70b426b091fdf76856e289d5c1bd386ed7b"
+dependencies = [
+ "prost",
+ "prost-types",
+ "tokio",
+ "tokio-stream",
+ "tonic",
+ "tonic-prost",
+]
+
 [[package]]
 name = "tower"
 version = "0.5.2"

engine/Cargo.toml

@@ -14,6 +14,7 @@ prost = "0.14.1"
 tokio = { version = "1.48.0", features = ["rt-multi-thread"] }
 tonic = "0.14.2"
 tonic-prost = "0.14.2"
+tonic-reflection = "0.14.2"
 
 [features]
 jack = ["dep:jack"]

engine/src/main.rs

@@ -1,8 +1,9 @@
 mod audio_engine;
 use clap::Parser;
-use lib::termix::audio_backend::audio_backend_server::{AudioBackend, AudioBackendServer};
+use lib::termix::audio_backend::{FILE_DESCRIPTOR_SET, audio_backend_server::{AudioBackend, AudioBackendServer}};
 use tonic::{transport::Server, Request, Response, Status};
 use log::{debug, error, log_enabled, info, Level};
+use tonic_reflection::server::v1::{ReflectionService, ServerReflection};
 /// Simple program to greet a person
 #[derive(Parser, Debug)]
 #[command(version, about, long_about = None)]
@@ -32,12 +33,13 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     env_logger::init();
     let args = Args::parse();
     info!("starting the grpc server on port {}", args.grpc_port);
-    
+    let reflections = tonic_reflection::server::Builder::configure().register_encoded_file_descriptor_set(FILE_DESCRIPTOR_SET).build_v1().unwrap();
     let addr = "[::1]:50051".parse()?;
     let greeter = TermixAudioBackend::default();
 
     Server::builder()
         .add_service(AudioBackendServer::new(greeter))
+        .add_service(reflections)
         .serve(addr)
         .await?;
 

lib/build.rs

@@ -1,4 +1,4 @@
-use std::io::Result;
+use std::{env, io::Result, path::PathBuf};
 
 fn main() -> Result<()> {
     //let proto_dir = "proto";
@@ -6,7 +6,11 @@ fn main() -> Result<()> {
     //for path in paths {
     //    prost_build::compile_protos(&[path.unwrap().path()], &[proto_dir])?;
     //}
-    tonic_prost_build::compile_protos("proto/audio_backend.proto")
+    //
+    let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
+    tonic_prost_build::configure()
+        .file_descriptor_set_path(out_dir.join("audio_backend_descriptor.bin"))
+        .compile_protos(&["proto/audio_backend.proto"], &["proto"])
         .unwrap_or_else(|e| panic!("Failed to compile protos {:?}", e));
 
     Ok(())

lib/src/lib.rs

@@ -1,5 +1,6 @@
 pub mod termix {
     pub mod audio_backend {
+        pub const FILE_DESCRIPTOR_SET: &[u8] = tonic::include_file_descriptor_set!("audio_backend_descriptor");
         tonic::include_proto!("termix.audio_backend");
     }
 }