78 lines
2.3 KiB
Rust
78 lines
2.3 KiB
Rust
#[macro_use]
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extern crate failure;
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#[macro_use]
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extern crate log;
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extern crate serde;
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extern crate serde_json;
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#[macro_use]
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extern crate serde_derive;
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extern crate crossbeam_channel;
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extern crate languageserver_types;
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mod msg;
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mod stdio;
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use crossbeam_channel::{Sender, Receiver};
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use languageserver_types::{
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ServerCapabilities, InitializeResult,
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request::{Initialize},
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notification::{Initialized, Exit},
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};
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pub type Result<T> = ::std::result::Result<T, failure::Error>;
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pub use {
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msg::{RawMessage, RawRequest, RawResponse, RawResponseError, RawNotification, ErrorCode},
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stdio::{stdio_transport, Threads},
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};
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pub type LspServer = fn(&mut Receiver<RawMessage>, &mut Sender<RawMessage>) -> Result<()>;
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pub fn run_server(
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caps: ServerCapabilities,
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server: LspServer,
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mut receiver: Receiver<RawMessage>,
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mut sender: Sender<RawMessage>,
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) -> Result<()> {
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info!("lsp server initializes");
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initialize(&mut receiver, &mut sender, caps)?;
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info!("lsp server initialized, serving requests");
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server(&mut receiver, &mut sender)?;
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info!("lsp server waiting for exit notification");
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match receiver.recv() {
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Some(RawMessage::Notification(n)) => {
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n.cast::<Exit>().map_err(|n| format_err!(
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"unexpected notification during shutdown: {:?}", n
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))?
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}
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m => bail!("unexpected message during shutdown: {:?}", m)
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}
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info!("lsp server shutdown complete");
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Ok(())
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}
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fn initialize(
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receiver: &mut Receiver<RawMessage>,
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sender: &mut Sender<RawMessage>,
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caps: ServerCapabilities,
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) -> Result<()> {
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let id = match receiver.recv() {
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Some(RawMessage::Request(req)) => match req.cast::<Initialize>() {
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Err(req) => bail!("expected initialize request, got {:?}", req),
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Ok(req) => req.0,
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}
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msg =>
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bail!("expected initialize request, got {:?}", msg),
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};
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let resp = RawResponse::ok(id, InitializeResult { capabilities: caps });
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sender.send(RawMessage::Response(resp));
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match receiver.recv() {
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Some(RawMessage::Notification(n)) => {
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n.cast::<Initialized>().map_err(|_| format_err!(
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"expected initialized notification"
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))?;
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}
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_ => bail!("expected initialized notification"),
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}
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Ok(())
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}
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