fix(build): fix build of the project when no features are selected (modelcontextprotocol#606)

Author: pbezglasny

crates/rmcp/Cargo.toml

@@ -208,3 +208,25 @@ path = "tests/test_task.rs"
 name = "test_streamable_http_priming"
 required-features = ["server", "client", "transport-streamable-http-server", "reqwest"]
 path = "tests/test_streamable_http_priming.rs"
+
+
+[[test]]
+name = "test_custom_request"
+required-features = ["server", "client"]
+path = "tests/test_custom_request.rs"
+
+[[test]]
+name = "test_prompt_macros"
+required-features = ["server", "client"]
+path = "tests/test_prompt_macros.rs"
+
+[[test]]
+name = "test_sampling"
+required-features = ["server", "client"]
+path = "tests/test_sampling.rs"
+
+
+[[test]]
+name = "test_close_connection"
+required-features = ["server", "client"]
+path = "tests/test_close_connection.rs"

crates/rmcp/src/error.rs

@@ -20,6 +20,7 @@ impl std::error::Error for ErrorData {}
 
 /// This is an unified error type for the errors could be returned by the service.
 #[derive(Debug, thiserror::Error)]
+#[allow(clippy::large_enum_variant)]
 pub enum RmcpError {
     #[error("Service error: {0}")]
     Service(#[from] ServiceError),

crates/rmcp/src/lib.rs

@@ -104,9 +104,14 @@
 //!
 //! ```rust
 //! use anyhow::Result;
-//! use rmcp::{model::CallToolRequestParam, service::ServiceExt, transport::{TokioChildProcess, ConfigureCommandExt}};
+//! use rmcp::{model::CallToolRequestParam, service::ServiceExt};
+//! #[cfg(feature = "transport-child-process")]
+//! #[cfg_attr(docsrs, doc(cfg(feature = "transport-child-process")))]
+//! use rmcp::transport::{TokioChildProcess, ConfigureCommandExt};
 //! use tokio::process::Command;
 //!
+//! #[cfg(feature = "transport-child-process")]
+//! #[cfg_attr(docsrs, doc(cfg(feature = "transport-child-process")))]
 //! async fn client() -> Result<()> {
 //!     let service = ().serve(TokioChildProcess::new(Command::new("uvx").configure(|cmd| {
 //!         cmd.arg("mcp-server-git");

crates/rmcp/src/transport.rs

@@ -40,10 +40,15 @@
 //!
 //! ```rust
 //! # use rmcp::{
-//! #     ServiceExt, serve_client, serve_server,
+//! #     ServiceExt, serve_server,
 //! # };
+//! #[cfg(feature = "client")]
+//! #[cfg_attr(docsrs, doc(cfg(feature = "client")))]
+//! # use rmcp::serve_client;
 //!
 //! // create transport from tcp stream
+//! #[cfg(feature = "client")]
+//! #[cfg_attr(docsrs, doc(cfg(feature = "client")))]
 //! async fn client() -> Result<(), Box<dyn std::error::Error>> {
 //!     let stream = tokio::net::TcpSocket::new_v4()?
 //!         .connect("127.0.0.1:8001".parse()?)
@@ -55,6 +60,8 @@
 //! }
 //!
 //! // create transport from std io
+//! #[cfg(feature = "client")]
+//! #[cfg_attr(docsrs, doc(cfg(feature = "client")))]
 //! async fn io()  -> Result<(), Box<dyn std::error::Error>> {
 //!     let client = ().serve((tokio::io::stdin(), tokio::io::stdout())).await?;
 //!     let tools = client.peer().list_tools(Default::default()).await?;