Use Tokio 0.2

Cargo.toml

@@ -34,10 +34,9 @@ cargo = { git = "https://github.com/rust-lang/cargo", rev = "329895f5b52a358e5d9
 cargo_metadata = "0.8"
 clippy_lints = { git = "https://github.com/rust-lang/rust-clippy", rev = "7ea7cd165ad6705603852771bf82cc2fd6560db5", optional = true }
 env_logger = "0.7"
-futures = { version = "0.1", optional = true }
 home = "0.5.1"
 itertools = "0.8"
-jsonrpc-core = "14"
+jsonrpc-core = "17"
 lsp-types = { version = "0.60", features = ["proposed"] }
 lazy_static = "1"
 log = "0.4"
@@ -51,7 +50,6 @@ serde = "1.0"
 serde_json = "1.0"
 serde_derive = "1.0"
 serde_ignored = "0.1"
-tokio = { version = "0.1", optional = true }
 url = "2"
 walkdir = "2"
 regex = "1"
@@ -68,16 +66,15 @@ rustc-workspace-hack = "1.0.0"
 [dev-dependencies]
 difference = "2"
 tempfile = "3"
-lsp-codec = "0.1.2"
-tokio = "0.1"
-futures = "0.1"
-tokio-process = "0.2"
-tokio-timer = "0.2"
+lsp-codec = "0.2"
+tokio = { version = "0.2", default-features = false, features = ["rt-core", "time", "io-util", "process", "rt-util"] }
+tokio-util = { version = "0.3", default-features = false, features = ["codec"] }
+futures = "0.3"
 
 [build-dependencies]
 rustc_tools_util = "0.2"
 
 [features]
 clippy = ["clippy_lints", "rls-rustc/clippy"]
-ipc = ["tokio", "futures", "rls-rustc/ipc", "rls-ipc/server"]
+ipc = ["rls-rustc/ipc", "rls-ipc/server"]
 default = ["ipc"]

rls-ipc/Cargo.toml

@@ -9,11 +9,10 @@ repository = "https://github.com/rust-lang/rls"
 categories = ["development-tools"]
 
 [dependencies]
-jsonrpc-core = "14"
-jsonrpc-core-client = "14"
-jsonrpc-derive = "14"
-# Pin 14.0.3 to use single parity-tokio-ipc version (0.2)
-jsonrpc-ipc-server = { version = "=14.0.3", optional = true }
+jsonrpc-core = "17"
+jsonrpc-core-client = "17"
+jsonrpc-derive = "17"
+jsonrpc-ipc-server = { version = "17", optional = true }
 rls-data = "0.19"
 serde = { version = "1.0", features = ["derive"] }
 

rls-rustc/Cargo.toml

@@ -13,8 +13,8 @@ env_logger = "0.7"
 log = "0.4"
 rand = "0.7"
 clippy_lints = { git = "https://github.com/rust-lang/rust-clippy", rev = "d236b30a1d638340aad8345fa2946cfe9543dcf0", optional = true }
-tokio = { version = "0.1", optional = true }
-futures = { version = "0.1", optional = true }
+tokio = { version = "0.2", optional = true }
+futures = { version = "0.3", optional = true }
 serde = { version = "1", features = ["derive"], optional = true }
 rls-data = { version = "0.19", optional = true }
 rls-ipc = { path = "../rls-ipc", optional = true }

rls-rustc/src/ipc.rs

@@ -1,9 +1,8 @@
 use std::collections::{HashMap, HashSet};
+use std::future::Future;
 use std::io;
 use std::path::{Path, PathBuf};
 
-use futures::Future;
-
 use rls_ipc::client::{Client as JointClient, RpcChannel, RpcError};
 use rls_ipc::rpc::callbacks::Client as CallbacksClient;
 use rls_ipc::rpc::file_loader::Client as FileLoaderClient;
@@ -30,13 +29,11 @@ impl IpcFileLoader {
 
 impl rustc_span::source_map::FileLoader for IpcFileLoader {
     fn file_exists(&self, path: &Path) -> bool {
-        self.0.file_exists(path.to_owned()).wait().unwrap()
+        futures::executor::block_on(self.0.file_exists(path.to_owned())).unwrap()
     }
 
     fn read_file(&self, path: &Path) -> io::Result<String> {
-        self.0
-            .read_file(path.to_owned())
-            .wait()
+        futures::executor::block_on(self.0.read_file(path.to_owned()))
             .map_err(|e| io::Error::new(io::ErrorKind::Other, format!("{}", e)))
     }
 }
@@ -48,14 +45,14 @@ impl IpcCallbacks {
     pub fn complete_analysis(
         &self,
         analysis: rls_data::Analysis,
-    ) -> impl Future<Item = (), Error = RpcError> {
+    ) -> impl Future<Output = Result<(), RpcError>> {
         self.0.complete_analysis(analysis)
     }
 
     pub fn input_files(
         &self,
         input_files: HashMap<PathBuf, HashSet<rls_ipc::rpc::Crate>>,
-    ) -> impl Future<Item = (), Error = RpcError> {
+    ) -> impl Future<Output = Result<(), RpcError>> {
         self.0.input_files(input_files)
     }
 }

rls-rustc/src/lib.rs

@@ -34,12 +34,9 @@ pub fn run() -> Result<(), ()> {
     #[cfg(feature = "ipc")]
     let (mut shim_calls, file_loader) = match std::env::var("RLS_IPC_ENDPOINT").ok() {
         Some(endpoint) => {
-            #[allow(deprecated)] // Windows doesn't work with lazily-bound reactors
-            let reactor = rt.reactor().clone();
-            let connection =
-                ipc::connect(endpoint, &reactor).expect("Couldn't connect to IPC endpoint");
-            let client: ipc::Client =
-                rt.block_on(connection).expect("Couldn't connect to IPC endpoint");
+            let client: ipc::Client = rt
+                .block_on(async { ipc::connect(endpoint).await })
+                .expect("Couldn't connect to IPC endpoint");
             let (file_loader, callbacks) = client.split();
 
             (
@@ -113,7 +110,6 @@ impl Callbacks for ShimCalls {
     ) -> Compilation {
         use rustc_session::config::Input;
 
-        use futures::future::Future;
         use rls_ipc::rpc::{Crate, Edition};
         use std::collections::{HashMap, HashSet};
 
@@ -149,7 +145,7 @@ impl Callbacks for ShimCalls {
             input_files.entry(file).or_default().insert(krate.clone());
         }
 
-        if let Err(e) = callbacks.input_files(input_files).wait() {
+        if let Err(e) = futures::executor::block_on(callbacks.input_files(input_files)) {
             log::error!("Can't send input files as part of a compilation callback: {:?}", e);
         }
 
@@ -162,8 +158,6 @@ impl Callbacks for ShimCalls {
         compiler: &interface::Compiler,
         queries: &'tcx Queries<'tcx>,
     ) -> Compilation {
-        use futures::future::Future;
-
         let callbacks = match self.callbacks.as_ref() {
             Some(callbacks) => callbacks,
             None => return Compilation::Continue,
@@ -196,7 +190,9 @@ impl Callbacks for ShimCalls {
                 CallbackHandler {
                     callback: &mut |a| {
                         let analysis = unsafe { ::std::mem::transmute(a.clone()) };
-                        if let Err(e) = callbacks.complete_analysis(analysis).wait() {
+                        if let Err(e) =
+                            futures::executor::block_on(callbacks.complete_analysis(analysis))
+                        {
                             log::error!(
                                 "Can't send analysis as part of a compilation callback: {:?}",
                                 e

rls/src/build/ipc.rs

@@ -57,13 +57,7 @@ pub fn start_with_handler(io: IoHandler) -> Result<Server, ()> {
         let endpoint_path = endpoint_path.clone();
         move || {
             log::trace!("Attempting to spin up IPC server at {}", endpoint_path);
-            let runtime = tokio::runtime::Builder::new().core_threads(1).build().unwrap();
-            #[allow(deprecated)] // Windows won't work with lazily bound reactor
-            let (reactor, executor) = (runtime.reactor(), runtime.executor());
-
             let server = ServerBuilder::new(io)
-                .event_loop_executor(executor)
-                .event_loop_reactor(reactor.clone())
                 .start(&endpoint_path)
                 .map_err(|_| log::warn!("Couldn't open socket"))
                 .unwrap();

tests/client.rs

@@ -1,8 +1,8 @@
 use std::fs;
 use std::path::Path;
-use std::time::{Duration, Instant};
+use std::time::Duration;
 
-use futures::future::Future;
+use futures::future;
 use lsp_types::{notification::*, request::*, *};
 use serde::de::Deserialize;
 use serde_json::json;
@@ -245,7 +245,8 @@ fn client_changing_workspace_lib_retains_diagnostics() {
 
     let lib = rls.future_diagnostics("library/src/lib.rs");
     let bin = rls.future_diagnostics("binary/src/main.rs");
-    let (lib, bin) = rls.block_on(lib.join(bin)).unwrap();
+    let (lib, bin) = rls.block_on(future::join(lib, bin)).unwrap();
+    let (lib, bin) = (lib.unwrap(), bin.unwrap());
 
     assert!(lib.diagnostics.iter().any(|m| m.message.contains("unused variable: `test_val`")));
     assert!(lib.diagnostics.iter().any(|m| m.message.contains("unused variable: `unused`")));
@@ -268,7 +269,8 @@ fn client_changing_workspace_lib_retains_diagnostics() {
 
     let lib = rls.future_diagnostics("library/src/lib.rs");
     let bin = rls.future_diagnostics("binary/src/main.rs");
-    let (lib, bin) = rls.block_on(lib.join(bin)).unwrap();
+    let (lib, bin) = rls.block_on(future::join(lib, bin)).unwrap();
+    let (lib, bin) = (lib.unwrap(), bin.unwrap());
 
     // lib unit tests have compile errors
     assert!(lib.diagnostics.iter().any(|m| m.message.contains("unused variable: `unused`")));
@@ -293,7 +295,8 @@ fn client_changing_workspace_lib_retains_diagnostics() {
 
     let lib = rls.future_diagnostics("library/src/lib.rs");
     let bin = rls.future_diagnostics("binary/src/main.rs");
-    let (lib, bin) = rls.block_on(lib.join(bin)).unwrap();
+    let (lib, bin) = rls.block_on(future::join(lib, bin)).unwrap();
+    let (lib, bin) = (lib.unwrap(), bin.unwrap());
 
     assert!(lib.diagnostics.iter().any(|m| m.message.contains("unused variable: `test_val`")));
     assert!(lib.diagnostics.iter().any(|m| m.message.contains("unused variable: `unused`")));
@@ -349,6 +352,7 @@ fn client_implicit_workspace_pick_up_lib_changes() {
 
     let bin = rls.future_diagnostics("src/main.rs");
     let bin = rls.block_on(bin).unwrap();
+    let bin = bin.unwrap();
     assert!(bin.diagnostics[0].message.contains("unused variable: `val`"));
 
     rls.notify::<DidChangeTextDocument>(DidChangeTextDocumentParams {
@@ -369,6 +373,7 @@ fn client_implicit_workspace_pick_up_lib_changes() {
     // bin depending on lib picks up type mismatch
     let bin = rls.future_diagnostics("src/main.rs");
     let bin = rls.block_on(bin).unwrap();
+    let bin = bin.unwrap();
     assert!(bin.diagnostics[0].message.contains("cannot find function `foo`"));
 
     rls.notify::<DidChangeTextDocument>(DidChangeTextDocumentParams {
@@ -388,6 +393,7 @@ fn client_implicit_workspace_pick_up_lib_changes() {
 
     let bin = rls.future_diagnostics("src/main.rs");
     let bin = rls.block_on(bin).unwrap();
+    let bin = bin.unwrap();
     assert!(bin.diagnostics[0].message.contains("unused variable: `val`"));
 }
 
@@ -1971,7 +1977,7 @@ fn client_omit_init_build() {
     // We need to assert that no other messages are received after a short
     // period of time (e.g. no build progress messages).
     std::thread::sleep(std::time::Duration::from_secs(1));
-    rls.block_on(response).unwrap();
+    rls.block_on(response).unwrap().unwrap();
 
     assert_eq!(rls.messages().iter().count(), 1);
 }
@@ -2141,8 +2147,7 @@ fn client_fail_uninitialized_request() {
         },
     );
 
-    let delay = tokio_timer::Delay::new(Instant::now() + Duration::from_secs(1));
-    rls.block_on(delay).unwrap();
+    rls.block_on(async { tokio::time::delay_for(Duration::from_secs(1)).await }).unwrap();
 
     let err = jsonrpc_core::Failure::deserialize(rls.messages().last().unwrap()).unwrap();
     assert_eq!(err.id, jsonrpc_core::Id::Num(ID));

tests/support/client/child_process.rs

@@ -1,55 +1,61 @@
-use std::io::{Read, Write};
+use std::io;
+use std::pin::Pin;
 use std::process::{Command, Stdio};
 use std::rc::Rc;
+use std::task::{Context, Poll};
 
-use futures::Poll;
 use tokio::io::{AsyncRead, AsyncWrite};
-use tokio_process::{Child, CommandExt};
 
 pub struct ChildProcess {
-    stdin: tokio_process::ChildStdin,
-    stdout: tokio_process::ChildStdout,
-    child: Rc<tokio_process::Child>,
+    stdin: tokio::process::ChildStdin,
+    stdout: tokio::process::ChildStdout,
+    child: Rc<tokio::process::Child>,
 }
 
-impl Read for ChildProcess {
-    fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
-        Read::read(&mut self.stdout, buf)
+impl AsyncRead for ChildProcess {
+    fn poll_read(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &mut [u8],
+    ) -> Poll<io::Result<usize>> {
+        Pin::new(&mut self.stdout).poll_read(cx, buf)
     }
 }
 
-impl Write for ChildProcess {
-    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
-        Write::write(&mut self.stdin, buf)
+impl AsyncWrite for ChildProcess {
+    fn poll_write(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &[u8],
+    ) -> Poll<io::Result<usize>> {
+        Pin::new(&mut self.stdin).poll_write(cx, buf)
     }
-    fn flush(&mut self) -> std::io::Result<()> {
-        Write::flush(&mut self.stdin)
+
+    fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
+        Pin::new(&mut self.stdin).poll_flush(cx)
     }
-}
 
-impl AsyncRead for ChildProcess {}
-impl AsyncWrite for ChildProcess {
-    fn shutdown(&mut self) -> Poll<(), std::io::Error> {
-        AsyncWrite::shutdown(&mut self.stdin)
+    fn poll_shutdown(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
+        Pin::new(&mut self.stdin).poll_shutdown(cx)
     }
 }
 
 impl ChildProcess {
     pub fn spawn_from_command(mut cmd: Command) -> Result<ChildProcess, std::io::Error> {
         cmd.stdin(Stdio::piped());
         cmd.stdout(Stdio::piped());
-        let mut child = cmd.spawn_async()?;
+        let mut child = tokio::process::Command::from(cmd).spawn().expect("to async spawn process");
 
         Ok(ChildProcess {
-            stdout: child.stdout().take().unwrap(),
-            stdin: child.stdin().take().unwrap(),
+            stdout: child.stdout.take().unwrap(),
+            stdin: child.stdin.take().unwrap(),
             child: Rc::new(child),
         })
     }
 
     /// Returns a handle to the underlying `Child` process.
     /// Useful when waiting until child process exits.
-    pub fn child(&self) -> Rc<Child> {
+    pub fn child(&self) -> Rc<tokio::process::Child> {
         Rc::clone(&self.child)
     }
 }