mirror of
https://github.com/rust-lang/rust-analyzer
synced 2024-12-29 14:33:29 +00:00
e16c76e3c3
This makes code more readale and concise,
moving all format arguments like `format!("{}", foo)`
into the more compact `format!("{foo}")` form.
The change was automatically created with, so there are far less change
of an accidental typo.
```
cargo clippy --fix -- -A clippy::all -W clippy::uninlined_format_args
```
121 lines
4.1 KiB
Rust
121 lines
4.1 KiB
Rust
//! A minimal example LSP server that can only respond to the `gotoDefinition` request. To use
|
|
//! this example, execute it and then send an `initialize` request.
|
|
//!
|
|
//! ```no_run
|
|
//! Content-Length: 85
|
|
//!
|
|
//! {"jsonrpc": "2.0", "method": "initialize", "id": 1, "params": {"capabilities": {}}}
|
|
//! ```
|
|
//!
|
|
//! This will respond with a server response. Then send it a `initialized` notification which will
|
|
//! have no response.
|
|
//!
|
|
//! ```no_run
|
|
//! Content-Length: 59
|
|
//!
|
|
//! {"jsonrpc": "2.0", "method": "initialized", "params": {}}
|
|
//! ```
|
|
//!
|
|
//! Once these two are sent, then we enter the main loop of the server. The only request this
|
|
//! example can handle is `gotoDefinition`:
|
|
//!
|
|
//! ```no_run
|
|
//! Content-Length: 159
|
|
//!
|
|
//! {"jsonrpc": "2.0", "method": "textDocument/definition", "id": 2, "params": {"textDocument": {"uri": "file://temp"}, "position": {"line": 1, "character": 1}}}
|
|
//! ```
|
|
//!
|
|
//! To finish up without errors, send a shutdown request:
|
|
//!
|
|
//! ```no_run
|
|
//! Content-Length: 67
|
|
//!
|
|
//! {"jsonrpc": "2.0", "method": "shutdown", "id": 3, "params": null}
|
|
//! ```
|
|
//!
|
|
//! The server will exit the main loop and finally we send a `shutdown` notification to stop
|
|
//! the server.
|
|
//!
|
|
//! ```
|
|
//! Content-Length: 54
|
|
//!
|
|
//! {"jsonrpc": "2.0", "method": "exit", "params": null}
|
|
//! ```
|
|
use std::error::Error;
|
|
|
|
use lsp_types::OneOf;
|
|
use lsp_types::{
|
|
request::GotoDefinition, GotoDefinitionResponse, InitializeParams, ServerCapabilities,
|
|
};
|
|
|
|
use lsp_server::{Connection, ExtractError, Message, Request, RequestId, Response};
|
|
|
|
fn main() -> Result<(), Box<dyn Error + Sync + Send>> {
|
|
// Note that we must have our logging only write out to stderr.
|
|
eprintln!("starting generic LSP server");
|
|
|
|
// Create the transport. Includes the stdio (stdin and stdout) versions but this could
|
|
// also be implemented to use sockets or HTTP.
|
|
let (connection, io_threads) = Connection::stdio();
|
|
|
|
// Run the server and wait for the two threads to end (typically by trigger LSP Exit event).
|
|
let server_capabilities = serde_json::to_value(&ServerCapabilities {
|
|
definition_provider: Some(OneOf::Left(true)),
|
|
..Default::default()
|
|
})
|
|
.unwrap();
|
|
let initialization_params = connection.initialize(server_capabilities)?;
|
|
main_loop(connection, initialization_params)?;
|
|
io_threads.join()?;
|
|
|
|
// Shut down gracefully.
|
|
eprintln!("shutting down server");
|
|
Ok(())
|
|
}
|
|
|
|
fn main_loop(
|
|
connection: Connection,
|
|
params: serde_json::Value,
|
|
) -> Result<(), Box<dyn Error + Sync + Send>> {
|
|
let _params: InitializeParams = serde_json::from_value(params).unwrap();
|
|
eprintln!("starting example main loop");
|
|
for msg in &connection.receiver {
|
|
eprintln!("got msg: {msg:?}");
|
|
match msg {
|
|
Message::Request(req) => {
|
|
if connection.handle_shutdown(&req)? {
|
|
return Ok(());
|
|
}
|
|
eprintln!("got request: {req:?}");
|
|
match cast::<GotoDefinition>(req) {
|
|
Ok((id, params)) => {
|
|
eprintln!("got gotoDefinition request #{id}: {params:?}");
|
|
let result = Some(GotoDefinitionResponse::Array(Vec::new()));
|
|
let result = serde_json::to_value(&result).unwrap();
|
|
let resp = Response { id, result: Some(result), error: None };
|
|
connection.sender.send(Message::Response(resp))?;
|
|
continue;
|
|
}
|
|
Err(err @ ExtractError::JsonError { .. }) => panic!("{err:?}"),
|
|
Err(ExtractError::MethodMismatch(req)) => req,
|
|
};
|
|
// ...
|
|
}
|
|
Message::Response(resp) => {
|
|
eprintln!("got response: {resp:?}");
|
|
}
|
|
Message::Notification(not) => {
|
|
eprintln!("got notification: {not:?}");
|
|
}
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
fn cast<R>(req: Request) -> Result<(RequestId, R::Params), ExtractError<Request>>
|
|
where
|
|
R: lsp_types::request::Request,
|
|
R::Params: serde::de::DeserializeOwned,
|
|
{
|
|
req.extract(R::METHOD)
|
|
}
|