add usage with tonic-build doc

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

Cargo.toml

@@ -30,6 +30,7 @@ prost-reflect = { version = "0.14.1", features = ["derive", "serde"] }
 prost-reflect-build = "0.14.0"
 tonic = "0.12.3"
 tonic-types = "0.12.3"
+tonic-build = "0.12.3"
 anyhow = "1.0.86"
 thiserror = "1.0.63"
 http = "1.1.0"

example-proto/Cargo.toml

@@ -11,14 +11,13 @@ publish = false
 
 [dependencies]
 prost = { workspace = true }
-prost-types = { workspace = true }
 prost-reflect = { workspace = true }
 prost-validate = { workspace = true, features = ["derive"] }
-prost-reflect-validate = { workspace = true }
+tonic = { workspace = true }
 once_cell = { workspace = true }
-anyhow = { workspace = true }
 
 [build-dependencies]
 prost-build = { workspace = true }
 prost-reflect-build = { workspace = true }
 prost-validate-build = { workspace = true }
+tonic-build = { workspace = true }

example-proto/build.rs

@@ -1,8 +1,12 @@
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let files = &["message.proto"];
+    let files = &["message.proto", "service.proto"];
     let includes = &["proto", "../prost-validate-types/proto"];
 
-    let mut config = prost_build::Config::new();
+    let mut config = {
+        let mut c = prost_build::Config::new();
+        c.service_generator(tonic_build::configure().service_generator());
+        c
+    };
 
     prost_validate_build::Builder::new().configure(&mut config, files, includes)?;
 

example-proto/proto/service.proto

@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+package validate.example;
+
+import "validate/validate.proto";
+
+import "message.proto";
+
+service ExampleService {
+  rpc ExampleMethod (ExampleMessage) returns (ExampleMessage);
+}

prost-validate-build/README.md

@@ -60,16 +60,36 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
 ### Generating `prost-build` configuration for usage with other generators
 
-#### Example for `prost-reflect-build`
+#### Example for `prost-reflect-build` and `tonic-build`
+
+`service.proto`:
+
+```proto
+syntax = "proto3";
+
+package validate.example;
+
+import "validate/validate.proto";
+
+import "message.proto";
+
+service ExampleService {
+  rpc ExampleMethod (ExampleMessage) returns (ExampleMessage);
+}
+```
 
 `build.rs`:
 
 ```rust
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let files = &["message.proto"];
+    let files = &["message.proto", "service.proto"];
     let includes = &["proto", "../prost-validate-types/proto"];
 
-    let mut config = prost_build::Config::new();
+    let mut config = {
+        let mut c = prost_build::Config::new();
+        c.service_generator(tonic_build::configure().service_generator());
+        c
+    };
 
     prost_validate_build::Builder::new().configure(&mut config, files, includes)?;