lsp: Move timeouts into client.request

Cargo.lock

@@ -527,6 +527,7 @@ dependencies = [
  "serde_json",
  "shellexpand",
  "smol",
+ "smol-timeout",
  "thiserror",
  "url",
 ]

helix-lsp/Cargo.toml

@@ -13,6 +13,7 @@ once_cell = "1.4"
 
 lsp-types = { version = "0.86", features = ["proposed"] }
 smol = "1.2"
+smol-timeout = "0.6"
 url = "2"
 pathdiff = "0.2"
 shellexpand = "2.0"

helix-lsp/src/client.rs

@@ -114,7 +114,14 @@ impl Client {
             .await
             .map_err(|e| Error::Other(e.into()))?;
 
-        let response = rx.recv().await.map_err(|e| Error::Other(e.into()))??;
+        use smol_timeout::TimeoutExt;
+        use std::time::Duration;
+
+        let response = match rx.recv().timeout(Duration::from_secs(2)).await {
+            Some(response) => response,
+            None => return Err(Error::Timeout),
+        }
+        .map_err(|e| Error::Other(e.into()))??;
 
         let response = serde_json::from_value(response)?;
 

helix-term/src/commands.rs

@@ -857,21 +857,15 @@ pub fn completion(cx: &mut Context) {
     let language_server = cx.language_servers.get("rust", &cx.executor).unwrap();
     use log::info;
 
-    use smol_timeout::TimeoutExt;
-    use std::time::Duration;
-
     // TODO: blocking here is not ideal
     let pos = helix_lsp::util::pos_to_lsp_pos(
         &cx.view.doc.text().slice(..),
         cx.view.doc.selection().cursor(),
     );
-    let res = smol::block_on(
-        language_server
-            .completion(cx.view.doc.identifier(), pos)
-            .timeout(Duration::from_secs(2)),
-    )
-    .expect("completion failed!")
-    .unwrap_or_default(); // if timeout, just return
+
+    // TODO: handle fails
+    let res = smol::block_on(language_server.completion(cx.view.doc.identifier(), pos))
+        .unwrap_or_default();
 
     // TODO: if no completion, show some message or something
     if !res.is_empty() {