From bfed50e79d5400381912be3bef9225f0778c78a2 Mon Sep 17 00:00:00 2001
From: David Bernard <david.bernard.31@gmail.com>
Date: Sun, 22 Sep 2024 16:54:28 +0200
Subject: [PATCH] build(example): made protoc useless to build grpc client &
 server

- store the generated content
---
 examples/grpc/build.rs                        |  14 +-
 examples/grpc/src/client.rs                   |   9 +-
 examples/grpc/src/generated/helloworld.rs     | 364 ++++++++++++++++++
 .../src/generated/helloworld_descriptor.bin   | Bin 0 -> 3223 bytes
 examples/grpc/src/server.rs                   |  16 +-
 5 files changed, 390 insertions(+), 13 deletions(-)
 create mode 100644 examples/grpc/src/generated/helloworld.rs
 create mode 100644 examples/grpc/src/generated/helloworld_descriptor.bin

diff --git a/examples/grpc/build.rs b/examples/grpc/build.rs
index d72abf5..e4b96e7 100644
--- a/examples/grpc/build.rs
+++ b/examples/grpc/build.rs
@@ -1,10 +1,20 @@
-use std::{env, path::PathBuf};
+use std::path::PathBuf;
 
 fn main() {
-    let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
+    // trigger rebuild if "proto" folder change
+    print!("cargo:rerun-if-changed=./proto");
+
+    //let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
+    let out_dir = PathBuf::from(std::env!("CARGO_MANIFEST_DIR"))
+        .join("src")
+        .join("generated");
+    std::fs::create_dir_all(&out_dir).unwrap();
 
     tonic_build::configure()
+        .build_client(true)
+        .build_server(true)
         .file_descriptor_set_path(out_dir.join("helloworld_descriptor.bin"))
+        .out_dir(out_dir)
         .compile(&["helloworld.proto"], &["proto"])
         .unwrap();
 }
diff --git a/examples/grpc/src/client.rs b/examples/grpc/src/client.rs
index d50bed5..01fc1b3 100644
--- a/examples/grpc/src/client.rs
+++ b/examples/grpc/src/client.rs
@@ -1,12 +1,13 @@
-use hello_world::greeter_client::GreeterClient;
-use hello_world::{HelloRequest, StatusRequest};
+use generated::greeter_client::GreeterClient;
+use generated::{HelloRequest, StatusRequest};
 use tonic::transport::Channel;
 use tonic::Code;
 use tonic_tracing_opentelemetry::middleware::client::OtelGrpcLayer;
 use tower::ServiceBuilder;
 
-pub mod hello_world {
-    tonic::include_proto!("helloworld");
+pub mod generated {
+    //tonic::include_proto!("helloworld");
+    include!("generated/helloworld.rs");
 }
 
 #[tokio::main]
diff --git a/examples/grpc/src/generated/helloworld.rs b/examples/grpc/src/generated/helloworld.rs
new file mode 100644
index 0000000..be21540
--- /dev/null
+++ b/examples/grpc/src/generated/helloworld.rs
@@ -0,0 +1,364 @@
+// This file is @generated by prost-build.
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct HelloRequest {
+    #[prost(string, tag = "1")]
+    pub name: ::prost::alloc::string::String,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct HelloReply {
+    #[prost(string, tag = "1")]
+    pub message: ::prost::alloc::string::String,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct StatusRequest {
+    /// <https://github.com/grpc/grpc/blob/master/doc/statuscodes.md#status-codes-and-their-use-in-grpc>
+    #[prost(int32, tag = "1")]
+    pub code: i32,
+    #[prost(string, tag = "2")]
+    pub message: ::prost::alloc::string::String,
+}
+/// Generated client implementations.
+pub mod greeter_client {
+    #![allow(unused_variables, dead_code, missing_docs, clippy::let_unit_value)]
+    use tonic::codegen::*;
+    use tonic::codegen::http::Uri;
+    #[derive(Debug, Clone)]
+    pub struct GreeterClient<T> {
+        inner: tonic::client::Grpc<T>,
+    }
+    impl GreeterClient<tonic::transport::Channel> {
+        /// Attempt to create a new client by connecting to a given endpoint.
+        pub async fn connect<D>(dst: D) -> Result<Self, tonic::transport::Error>
+        where
+            D: TryInto<tonic::transport::Endpoint>,
+            D::Error: Into<StdError>,
+        {
+            let conn = tonic::transport::Endpoint::new(dst)?.connect().await?;
+            Ok(Self::new(conn))
+        }
+    }
+    impl<T> GreeterClient<T>
+    where
+        T: tonic::client::GrpcService<tonic::body::BoxBody>,
+        T::Error: Into<StdError>,
+        T::ResponseBody: Body<Data = Bytes> + std::marker::Send + 'static,
+        <T::ResponseBody as Body>::Error: Into<StdError> + std::marker::Send,
+    {
+        pub fn new(inner: T) -> Self {
+            let inner = tonic::client::Grpc::new(inner);
+            Self { inner }
+        }
+        pub fn with_origin(inner: T, origin: Uri) -> Self {
+            let inner = tonic::client::Grpc::with_origin(inner, origin);
+            Self { inner }
+        }
+        pub fn with_interceptor<F>(
+            inner: T,
+            interceptor: F,
+        ) -> GreeterClient<InterceptedService<T, F>>
+        where
+            F: tonic::service::Interceptor,
+            T::ResponseBody: Default,
+            T: tonic::codegen::Service<
+                http::Request<tonic::body::BoxBody>,
+                Response = http::Response<
+                    <T as tonic::client::GrpcService<tonic::body::BoxBody>>::ResponseBody,
+                >,
+            >,
+            <T as tonic::codegen::Service<
+                http::Request<tonic::body::BoxBody>,
+            >>::Error: Into<StdError> + std::marker::Send + std::marker::Sync,
+        {
+            GreeterClient::new(InterceptedService::new(inner, interceptor))
+        }
+        /// Compress requests with the given encoding.
+        ///
+        /// This requires the server to support it otherwise it might respond with an
+        /// error.
+        #[must_use]
+        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.inner = self.inner.send_compressed(encoding);
+            self
+        }
+        /// Enable decompressing responses.
+        #[must_use]
+        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.inner = self.inner.accept_compressed(encoding);
+            self
+        }
+        /// Limits the maximum size of a decoded message.
+        ///
+        /// Default: `4MB`
+        #[must_use]
+        pub fn max_decoding_message_size(mut self, limit: usize) -> Self {
+            self.inner = self.inner.max_decoding_message_size(limit);
+            self
+        }
+        /// Limits the maximum size of an encoded message.
+        ///
+        /// Default: `usize::MAX`
+        #[must_use]
+        pub fn max_encoding_message_size(mut self, limit: usize) -> Self {
+            self.inner = self.inner.max_encoding_message_size(limit);
+            self
+        }
+        pub async fn say_hello(
+            &mut self,
+            request: impl tonic::IntoRequest<super::HelloRequest>,
+        ) -> std::result::Result<tonic::Response<super::HelloReply>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/helloworld.Greeter/SayHello",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("helloworld.Greeter", "SayHello"));
+            self.inner.unary(req, path, codec).await
+        }
+        pub async fn say_status(
+            &mut self,
+            request: impl tonic::IntoRequest<super::StatusRequest>,
+        ) -> std::result::Result<tonic::Response<()>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/helloworld.Greeter/SayStatus",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("helloworld.Greeter", "SayStatus"));
+            self.inner.unary(req, path, codec).await
+        }
+    }
+}
+/// Generated server implementations.
+pub mod greeter_server {
+    #![allow(unused_variables, dead_code, missing_docs, clippy::let_unit_value)]
+    use tonic::codegen::*;
+    /// Generated trait containing gRPC methods that should be implemented for use with GreeterServer.
+    #[async_trait]
+    pub trait Greeter: std::marker::Send + std::marker::Sync + 'static {
+        async fn say_hello(
+            &self,
+            request: tonic::Request<super::HelloRequest>,
+        ) -> std::result::Result<tonic::Response<super::HelloReply>, tonic::Status>;
+        async fn say_status(
+            &self,
+            request: tonic::Request<super::StatusRequest>,
+        ) -> std::result::Result<tonic::Response<()>, tonic::Status>;
+    }
+    #[derive(Debug)]
+    pub struct GreeterServer<T> {
+        inner: Arc<T>,
+        accept_compression_encodings: EnabledCompressionEncodings,
+        send_compression_encodings: EnabledCompressionEncodings,
+        max_decoding_message_size: Option<usize>,
+        max_encoding_message_size: Option<usize>,
+    }
+    impl<T> GreeterServer<T> {
+        pub fn new(inner: T) -> Self {
+            Self::from_arc(Arc::new(inner))
+        }
+        pub fn from_arc(inner: Arc<T>) -> Self {
+            Self {
+                inner,
+                accept_compression_encodings: Default::default(),
+                send_compression_encodings: Default::default(),
+                max_decoding_message_size: None,
+                max_encoding_message_size: None,
+            }
+        }
+        pub fn with_interceptor<F>(
+            inner: T,
+            interceptor: F,
+        ) -> InterceptedService<Self, F>
+        where
+            F: tonic::service::Interceptor,
+        {
+            InterceptedService::new(Self::new(inner), interceptor)
+        }
+        /// Enable decompressing requests with the given encoding.
+        #[must_use]
+        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.accept_compression_encodings.enable(encoding);
+            self
+        }
+        /// Compress responses with the given encoding, if the client supports it.
+        #[must_use]
+        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.send_compression_encodings.enable(encoding);
+            self
+        }
+        /// Limits the maximum size of a decoded message.
+        ///
+        /// Default: `4MB`
+        #[must_use]
+        pub fn max_decoding_message_size(mut self, limit: usize) -> Self {
+            self.max_decoding_message_size = Some(limit);
+            self
+        }
+        /// Limits the maximum size of an encoded message.
+        ///
+        /// Default: `usize::MAX`
+        #[must_use]
+        pub fn max_encoding_message_size(mut self, limit: usize) -> Self {
+            self.max_encoding_message_size = Some(limit);
+            self
+        }
+    }
+    impl<T, B> tonic::codegen::Service<http::Request<B>> for GreeterServer<T>
+    where
+        T: Greeter,
+        B: Body + std::marker::Send + 'static,
+        B::Error: Into<StdError> + std::marker::Send + 'static,
+    {
+        type Response = http::Response<tonic::body::BoxBody>;
+        type Error = std::convert::Infallible;
+        type Future = BoxFuture<Self::Response, Self::Error>;
+        fn poll_ready(
+            &mut self,
+            _cx: &mut Context<'_>,
+        ) -> Poll<std::result::Result<(), Self::Error>> {
+            Poll::Ready(Ok(()))
+        }
+        fn call(&mut self, req: http::Request<B>) -> Self::Future {
+            match req.uri().path() {
+                "/helloworld.Greeter/SayHello" => {
+                    #[allow(non_camel_case_types)]
+                    struct SayHelloSvc<T: Greeter>(pub Arc<T>);
+                    impl<T: Greeter> tonic::server::UnaryService<super::HelloRequest>
+                    for SayHelloSvc<T> {
+                        type Response = super::HelloReply;
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::HelloRequest>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move {
+                                <T as Greeter>::say_hello(&inner, request).await
+                            };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let method = SayHelloSvc(inner);
+                        let codec = tonic::codec::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                "/helloworld.Greeter/SayStatus" => {
+                    #[allow(non_camel_case_types)]
+                    struct SayStatusSvc<T: Greeter>(pub Arc<T>);
+                    impl<T: Greeter> tonic::server::UnaryService<super::StatusRequest>
+                    for SayStatusSvc<T> {
+                        type Response = ();
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::StatusRequest>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move {
+                                <T as Greeter>::say_status(&inner, request).await
+                            };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let method = SayStatusSvc(inner);
+                        let codec = tonic::codec::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                _ => {
+                    Box::pin(async move {
+                        Ok(
+                            http::Response::builder()
+                                .status(200)
+                                .header("grpc-status", tonic::Code::Unimplemented as i32)
+                                .header(
+                                    http::header::CONTENT_TYPE,
+                                    tonic::metadata::GRPC_CONTENT_TYPE,
+                                )
+                                .body(empty_body())
+                                .unwrap(),
+                        )
+                    })
+                }
+            }
+        }
+    }
+    impl<T> Clone for GreeterServer<T> {
+        fn clone(&self) -> Self {
+            let inner = self.inner.clone();
+            Self {
+                inner,
+                accept_compression_encodings: self.accept_compression_encodings,
+                send_compression_encodings: self.send_compression_encodings,
+                max_decoding_message_size: self.max_decoding_message_size,
+                max_encoding_message_size: self.max_encoding_message_size,
+            }
+        }
+    }
+    /// Generated gRPC service name
+    pub const SERVICE_NAME: &str = "helloworld.Greeter";
+    impl<T> tonic::server::NamedService for GreeterServer<T> {
+        const NAME: &'static str = SERVICE_NAME;
+    }
+}
diff --git a/examples/grpc/src/generated/helloworld_descriptor.bin b/examples/grpc/src/generated/helloworld_descriptor.bin
new file mode 100644
index 0000000000000000000000000000000000000000..3fff95c8b9237ed3de0736c7dec726a060712bfa
GIT binary patch
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diff --git a/examples/grpc/src/server.rs b/examples/grpc/src/server.rs
index 2be35f7..634e244 100644
--- a/examples/grpc/src/server.rs
+++ b/examples/grpc/src/server.rs
@@ -1,14 +1,16 @@
-use hello_world::greeter_server::{Greeter, GreeterServer};
-use hello_world::{HelloReply, HelloRequest, StatusRequest};
+use generated::greeter_server::{Greeter, GreeterServer};
+use generated::{HelloReply, HelloRequest, StatusRequest};
 use tonic::Code;
 use tonic::{transport::Server, Request, Response, Status};
 use tonic_tracing_opentelemetry::middleware::{filters, server};
 
-pub mod hello_world {
-    tonic::include_proto!("helloworld");
+pub mod generated {
+    //tonic::include_proto!("helloworld");
+    include!("generated/helloworld.rs");
 
     pub(crate) const FILE_DESCRIPTOR_SET: &[u8] =
-        tonic::include_file_descriptor_set!("helloworld_descriptor");
+        //tonic::include_file_descriptor_set!("helloworld_descriptor");
+        include_bytes!("generated/helloworld_descriptor.bin");
 }
 
 #[derive(Default)]
@@ -28,7 +30,7 @@ impl Greeter for MyGreeter {
             trace_id
         );
 
-        let reply = hello_world::HelloReply {
+        let reply = generated::HelloReply {
             message: format!("Hello {}! ({:?})", request.into_inner().name, trace_id),
         };
         Ok(Response::new(reply))
@@ -54,7 +56,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     let (_, health_service) = tonic_health::server::health_reporter();
     let reflection_service = tonic_reflection::server::Builder::configure()
-        .register_encoded_file_descriptor_set(hello_world::FILE_DESCRIPTOR_SET)
+        .register_encoded_file_descriptor_set(generated::FILE_DESCRIPTOR_SET)
         .build_v1()?;
 
     println!("GreeterServer listening on {}", addr);