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#[macro_use]
extern crate failure;
#[macro_use]
extern crate serde_derive;
extern crate serde;
extern crate serde_json;
extern crate languageserver_types;
extern crate drop_bomb;
#[macro_use]
extern crate crossbeam_channel;
extern crate threadpool;
#[macro_use]
extern crate log;
extern crate flexi_logger;
extern crate libeditor;
extern crate libanalysis;
mod io;
mod caps;
mod req;
mod dispatch;
use languageserver_types::InitializeResult;
use threadpool::ThreadPool;
use crossbeam_channel::{bounded, Sender, Receiver};
use flexi_logger::Logger;
use libanalysis::WorldState;
use ::{
io::{Io, RawMsg},
};
pub type Result<T> = ::std::result::Result<T, ::failure::Error>;
fn main() -> Result<()> {
Logger::with_env_or_str("m=trace")
.log_to_file()
.directory("log")
.start()?;
info!("starting server");
match ::std::panic::catch_unwind(|| main_inner()) {
Ok(res) => {
info!("shutting down: {:?}", res);
res
}
Err(_) => {
error!("server panicked");
bail!("server panicked")
},
}
}
fn main_inner() -> Result<()> {
let mut io = Io::from_stdio();
let res = initialize(&mut io);
info!("shutting down IO...");
let io_res = io.stop();
info!("... IO is down");
match (res, io_res) {
(Ok(()), Ok(())) => Ok(()),
(res, Ok(())) => res,
(Ok(()), io_res) => io_res,
(res, Err(io_err)) => {
error!("shutdown error: {:?}", io_err);
res
}
}
}
fn initialize(io: &mut Io) -> Result<()> {
loop {
match io.recv()? {
RawMsg::Request(req) => {
if let Some((_params, resp)) = dispatch::expect::<req::Initialize>(io, req)? {
resp.result(io, InitializeResult {
capabilities: caps::SERVER_CAPABILITIES
})?;
match io.recv()? {
RawMsg::Notification(n) => {
if n.method != "initialized" {
bail!("expected initialized notification");
}
}
_ => {
bail!("expected initialized notification");
}
}
return initialized(io);
}
}
RawMsg::Notification(n) => {
bail!("expected initialize request, got {:?}", n)
}
RawMsg::Response(res) => {
bail!("expected initialize request, got {:?}", res)
}
}
}
}
type Thunk = Box<for<'a> FnBox<&'a mut Io, Result<()>>>;
fn initialized(io: &mut Io) -> Result<()> {
let mut world = WorldState::new();
let mut pool = ThreadPool::new(4);
let (sender, receiver) = bounded::<Thunk>(16);
let res = main_loop(io, &mut world, &mut pool, sender, receiver.clone());
info!("waiting for background jobs to finish...");
receiver.for_each(drop);
info!("...background jobs have finished");
res
}
fn main_loop(
io: &mut Io,
world: &mut WorldState,
pool: &mut ThreadPool,
sender: Sender<Thunk>,
receiver: Receiver<Thunk>,
) -> Result<()> {
info!("server initialized, serving requests");
loop {
enum Event {
Msg(RawMsg),
Thunk(Thunk),
ReceiverDead,
}
let event = select! {
recv(io.receiver(), msg) => match msg {
Some(msg) => Event::Msg(msg),
None => Event::ReceiverDead,
},
recv(receiver, thunk) => Event::Thunk(thunk.unwrap()),
};
let msg = match event {
Event::ReceiverDead => {
io.cleanup_receiver()?;
unreachable!();
}
Event::Thunk(thunk) => {
thunk.call_box(io)?;
continue;
}
Event::Msg(msg) => msg,
};
match msg {
RawMsg::Request(req) => {
if let Some((params, resp)) = dispatch::expect::<req::SyntaxTree>(io, req)? {
let world = world.snapshot();
let sender = sender.clone();
pool.execute(move || {
let res: Result<String> = (|| {
let path = params.text_document.uri.to_file_path()
.map_err(|()| format_err!("invalid path"))?;
let file = world.file_syntax(&path)?;
Ok(libeditor::syntax_tree(&file))
})();
sender.send(Box::new(|io: &mut Io| resp.response(io, res)))
});
}
}
msg => {
eprintln!("msg = {:?}", msg);
}
}
}
}
trait FnBox<A, R>: Send {
fn call_box(self: Box<Self>, a: A) -> R;
}
impl<A, R, F: FnOnce(A) -> R + Send> FnBox<A, R> for F {
fn call_box(self: Box<F>, a: A) -> R {
(*self)(a)
}
}
|
