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Auto merge of #12431 - Veykril:request-retry, r=Veykril

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fix: Fix completions disappearing when typing two keys in quick succession

With this PR we now retry requests if they get cancelled due to document changes.

This fixes the completions problem we have where completions seem to randomly disappear, see https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer/topic/Completions.20not.20always.20appearing

Fixes https://github.com/rust-lang/rust-analyzer/issues/10187
Fixes https://github.com/rust-lang/rust-analyzer/issues/7560
Fixes https://github.com/rust-lang/rust-analyzer/issues/12153
This commit is contained in:
bors 2022-06-01 10:18:50 +00:00
commit 4f5c7aafff
6 changed files with 70 additions and 71 deletions
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2
crates/rust-analyzer/src/bin/main.rs
View File

@ -157,7 +157,7 @@ fn run_server() -> Result<()> {
let (initialize_id, initialize_params) = connection.initialize_start()?;
tracing::info!("InitializeParams: {}", initialize_params);
let initialize_params =
from_json::<lsp_types::InitializeParams>("InitializeParams", initialize_params)?;
from_json::<lsp_types::InitializeParams>("InitializeParams", &initialize_params)?;
let root_path = match initialize_params
.root_uri

93
crates/rust-analyzer/src/dispatch.rs
View File

@ -1,12 +1,12 @@
//! See [RequestDispatcher].
use std::{fmt, panic, thread};
use ide::Cancelled;
use lsp_server::ExtractError;
use serde::{de::DeserializeOwned, Serialize};
use crate::{
global_state::{GlobalState, GlobalStateSnapshot},
lsp_utils::is_cancelled,
main_loop::Task,
LspError, Result,
};
@ -37,38 +37,40 @@ impl<'a> RequestDispatcher<'a> {
pub(crate) fn on_sync_mut<R>(
&mut self,
f: fn(&mut GlobalState, R::Params) -> Result<R::Result>,
) -> Result<&mut Self>
) -> &mut Self
where
R: lsp_types::request::Request,
R::Params: DeserializeOwned + panic::UnwindSafe + fmt::Debug,
R::Result: Serialize,
{
let (id, params, panic_context) = match self.parse::<R>() {
let (req, params, panic_context) = match self.parse::<R>() {
Some(it) => it,
None => return Ok(self),
None => return self,
};
let _pctx = stdx::panic_context::enter(panic_context);
let result = {
let _pctx = stdx::panic_context::enter(panic_context);
f(self.global_state, params)
};
if let Ok(response) = result_to_response::<R>(req.id.clone(), result) {
self.global_state.respond(response);
}
let result = f(self.global_state, params);
let response = result_to_response::<R>(id, result);
self.global_state.respond(response);
Ok(self)
self
}
/// Dispatches the request onto the current thread.
pub(crate) fn on_sync<R>(
&mut self,
f: fn(GlobalStateSnapshot, R::Params) -> Result<R::Result>,
) -> Result<&mut Self>
) -> &mut Self
where
R: lsp_types::request::Request + 'static,
R: lsp_types::request::Request,
R::Params: DeserializeOwned + panic::UnwindSafe + fmt::Debug,
R::Result: Serialize,
{
let (id, params, panic_context) = match self.parse::<R>() {
let (req, params, panic_context) = match self.parse::<R>() {
Some(it) => it,
None => return Ok(self),
None => return self,
};
let global_state_snapshot = self.global_state.snapshot();
@ -76,10 +78,12 @@ pub(crate) fn on_sync<R>(
let _pctx = stdx::panic_context::enter(panic_context);
f(global_state_snapshot, params)
});
let response = thread_result_to_response::<R>(id, result);
self.global_state.respond(response);
Ok(self)
if let Ok(response) = thread_result_to_response::<R>(req.id.clone(), result) {
self.global_state.respond(response);
}
self
}
/// Dispatches the request onto thread pool
@ -92,7 +96,7 @@ pub(crate) fn on<R>(
R::Params: DeserializeOwned + panic::UnwindSafe + Send + fmt::Debug,
R::Result: Serialize,
{
let (id, params, panic_context) = match self.parse::<R>() {
let (req, params, panic_context) = match self.parse::<R>() {
Some(it) => it,
None => return self,
};
@ -104,8 +108,10 @@ pub(crate) fn on<R>(
let _pctx = stdx::panic_context::enter(panic_context);
f(world, params)
});
let response = thread_result_to_response::<R>(id, result);
Task::Response(response)
match thread_result_to_response::<R>(req.id.clone(), result) {
Ok(response) => Task::Response(response),
Err(_) => Task::Retry(req),
}
}
});
@ -124,7 +130,7 @@ pub(crate) fn finish(&mut self) {
}
}
fn parse<R>(&mut self) -> Option<(lsp_server::RequestId, R::Params, String)>
fn parse<R>(&mut self) -> Option<(lsp_server::Request, R::Params, String)>
where
R: lsp_types::request::Request,
R::Params: DeserializeOwned + fmt::Debug,
@ -134,12 +140,12 @@ fn parse<R>(&mut self) -> Option<(lsp_server::RequestId, R::Params, String)>
_ => return None,
};
let res = crate::from_json(R::METHOD, req.params);
let res = crate::from_json(R::METHOD, &req.params);
match res {
Ok(params) => {
let panic_context =
format!("\nversion: {}\nrequest: {} {:#?}", env!("REV"), R::METHOD, params);
Some((req.id, params, panic_context))
Some((req, params, panic_context))
}
Err(err) => {
let response = lsp_server::Response::new_err(
@ -157,7 +163,7 @@ fn parse<R>(&mut self) -> Option<(lsp_server::RequestId, R::Params, String)>
fn thread_result_to_response<R>(
id: lsp_server::RequestId,
result: thread::Result<Result<R::Result>>,
) -> lsp_server::Response
) -> Result<lsp_server::Response, Cancelled>
where
R: lsp_types::request::Request,
R::Params: DeserializeOwned,
@ -166,19 +172,22 @@ fn thread_result_to_response<R>(
match result {
Ok(result) => result_to_response::<R>(id, result),
Err(panic) => {
let mut message = "request handler panicked".to_string();
let panic_message = panic
.downcast_ref::<String>()
.map(String::as_str)
.or_else(|| panic.downcast_ref::<&str>().copied());
let mut message = "request handler panicked".to_string();
if let Some(panic_message) = panic_message {
message.push_str(": ");
message.push_str(panic_message)
};
lsp_server::Response::new_err(id, lsp_server::ErrorCode::InternalError as i32, message)
Ok(lsp_server::Response::new_err(
id,
lsp_server::ErrorCode::InternalError as i32,
message,
))
}
}
}
@ -186,33 +195,27 @@ fn thread_result_to_response<R>(
fn result_to_response<R>(
id: lsp_server::RequestId,
result: Result<R::Result>,
) -> lsp_server::Response
) -> Result<lsp_server::Response, Cancelled>
where
R: lsp_types::request::Request,
R::Params: DeserializeOwned,
R::Result: Serialize,
{
match result {
let res = match result {
Ok(resp) => lsp_server::Response::new_ok(id, &resp),
Err(e) => match e.downcast::<LspError>() {
Ok(lsp_error) => lsp_server::Response::new_err(id, lsp_error.code, lsp_error.message),
Err(e) => {
if is_cancelled(&*e) {
lsp_server::Response::new_err(
id,
lsp_server::ErrorCode::ContentModified as i32,
"content modified".to_string(),
)
} else {
lsp_server::Response::new_err(
id,
lsp_server::ErrorCode::InternalError as i32,
e.to_string(),
)
}
}
Err(e) => match e.downcast::<Cancelled>() {
Ok(cancelled) => return Err(*cancelled),
Err(e) => lsp_server::Response::new_err(
id,
lsp_server::ErrorCode::InternalError as i32,
e.to_string(),
),
},
},
}
};
Ok(res)
}
pub(crate) struct NotificationDispatcher<'a> {

2
crates/rust-analyzer/src/from_proto.rs
View File

@ -91,7 +91,7 @@ pub(crate) fn annotation(
) -> Result<Annotation> {
let data =
code_lens.data.ok_or_else(|| invalid_params_error("code lens without data".to_string()))?;
let resolve = from_json::<lsp_ext::CodeLensResolveData>("CodeLensResolveData", data)?;
let resolve = from_json::<lsp_ext::CodeLensResolveData>("CodeLensResolveData", &data)?;
match resolve {
lsp_ext::CodeLensResolveData::Impls(params) => {

2
crates/rust-analyzer/src/lib.rs
View File

@ -49,7 +49,7 @@ macro_rules! eprintln {
pub type Error = Box<dyn std::error::Error + Send + Sync>;
pub type Result<T, E = Error> = std::result::Result<T, E>;
pub fn from_json<T: DeserializeOwned>(what: &'static str, json: serde_json::Value) -> Result<T> {
pub fn from_json<T: DeserializeOwned>(what: &'static str, json: &serde_json::Value) -> Result<T> {
let res = serde_json::from_value(json.clone())
.map_err(|e| format!("Failed to deserialize {}: {}; {}", what, e, json))?;
Ok(res)

7
crates/rust-analyzer/src/lsp_utils.rs
View File

@ -1,7 +1,6 @@
//! Utilities for LSP-related boilerplate code.
use std::{error::Error, ops::Range, sync::Arc};
use std::{ops::Range, sync::Arc};
use ide_db::base_db::Cancelled;
use lsp_server::Notification;
use crate::{
@ -15,10 +14,6 @@ pub(crate) fn invalid_params_error(message: String) -> LspError {
LspError { code: lsp_server::ErrorCode::InvalidParams as i32, message }
}
pub(crate) fn is_cancelled(e: &(dyn Error + 'static)) -> bool {
e.downcast_ref::<Cancelled>().is_some()
}
pub(crate) fn notification_is<N: lsp_types::notification::Notification>(
notification: &Notification,
) -> bool {

35
crates/rust-analyzer/src/main_loop.rs
View File

@ -8,7 +8,7 @@
use always_assert::always;
use crossbeam_channel::{select, Receiver};
use ide_db::base_db::{SourceDatabaseExt, VfsPath};
use ide_db::base_db::{Cancelled, SourceDatabaseExt, VfsPath};
use lsp_server::{Connection, Notification, Request};
use lsp_types::notification::Notification as _;
use vfs::{ChangeKind, FileId};
@ -19,7 +19,7 @@
from_proto,
global_state::{file_id_to_url, url_to_file_id, GlobalState},
handlers, lsp_ext,
lsp_utils::{apply_document_changes, is_cancelled, notification_is, Progress},
lsp_utils::{apply_document_changes, notification_is, Progress},
mem_docs::DocumentData,
reload::{self, BuildDataProgress, ProjectWorkspaceProgress},
Result,
@ -60,6 +60,7 @@ enum Event {
#[derive(Debug)]
pub(crate) enum Task {
Response(lsp_server::Response),
Retry(lsp_server::Request),
Diagnostics(Vec<(FileId, Vec<lsp_types::Diagnostic>)>),
PrimeCaches(PrimeCachesProgress),
FetchWorkspace(ProjectWorkspaceProgress),
@ -196,7 +197,7 @@ fn handle_event(&mut self, event: Event) -> Result<()> {
let was_quiescent = self.is_quiescent();
match event {
Event::Lsp(msg) => match msg {
lsp_server::Message::Request(req) => self.on_request(loop_start, req)?,
lsp_server::Message::Request(req) => self.on_request(loop_start, req),
lsp_server::Message::Notification(not) => {
self.on_notification(not)?;
}
@ -208,6 +209,7 @@ fn handle_event(&mut self, event: Event) -> Result<()> {
loop {
match task {
Task::Response(response) => self.respond(response),
Task::Retry(req) => self.on_request(loop_start, req),
Task::Diagnostics(diagnostics_per_file) => {
for (file_id, diagnostics) in diagnostics_per_file {
self.diagnostics.set_native_diagnostics(file_id, diagnostics)
@ -553,7 +555,7 @@ fn handle_event(&mut self, event: Event) -> Result<()> {
Ok(())
}
fn on_request(&mut self, request_received: Instant, req: Request) -> Result<()> {
fn on_request(&mut self, request_received: Instant, req: Request) {
self.register_request(&req, request_received);
if self.shutdown_requested {
@ -562,8 +564,7 @@ fn on_request(&mut self, request_received: Instant, req: Request) -> Result<()>
lsp_server::ErrorCode::InvalidRequest as i32,
"Shutdown already requested.".to_owned(),
));
return Ok(());
return;
}
// Avoid flashing a bunch of unresolved references during initial load.
@ -573,21 +574,21 @@ fn on_request(&mut self, request_received: Instant, req: Request) -> Result<()>
lsp_server::ErrorCode::ContentModified as i32,
"waiting for cargo metadata or cargo check".to_owned(),
));
return Ok(());
return;
}
RequestDispatcher { req: Some(req), global_state: self }
.on_sync_mut::<lsp_types::request::Shutdown>(|s, ()| {
s.shutdown_requested = true;
Ok(())
})?
.on_sync_mut::<lsp_ext::ReloadWorkspace>(handlers::handle_workspace_reload)?
.on_sync_mut::<lsp_ext::MemoryUsage>(handlers::handle_memory_usage)?
.on_sync_mut::<lsp_ext::ShuffleCrateGraph>(handlers::handle_shuffle_crate_graph)?
.on_sync::<lsp_ext::JoinLines>(handlers::handle_join_lines)?
.on_sync::<lsp_ext::OnEnter>(handlers::handle_on_enter)?
.on_sync::<lsp_types::request::SelectionRangeRequest>(handlers::handle_selection_range)?
.on_sync::<lsp_ext::MatchingBrace>(handlers::handle_matching_brace)?
})
.on_sync_mut::<lsp_ext::ReloadWorkspace>(handlers::handle_workspace_reload)
.on_sync_mut::<lsp_ext::MemoryUsage>(handlers::handle_memory_usage)
.on_sync_mut::<lsp_ext::ShuffleCrateGraph>(handlers::handle_shuffle_crate_graph)
.on_sync::<lsp_ext::JoinLines>(handlers::handle_join_lines)
.on_sync::<lsp_ext::OnEnter>(handlers::handle_on_enter)
.on_sync::<lsp_types::request::SelectionRangeRequest>(handlers::handle_selection_range)
.on_sync::<lsp_ext::MatchingBrace>(handlers::handle_matching_brace)
.on::<lsp_ext::AnalyzerStatus>(handlers::handle_analyzer_status)
.on::<lsp_ext::SyntaxTree>(handlers::handle_syntax_tree)
.on::<lsp_ext::ViewHir>(handlers::handle_view_hir)
@ -644,8 +645,8 @@ fn on_request(&mut self, request_received: Instant, req: Request) -> Result<()>
.on::<lsp_types::request::WillRenameFiles>(handlers::handle_will_rename_files)
.on::<lsp_ext::Ssr>(handlers::handle_ssr)
.finish();
Ok(())
}
fn on_notification(&mut self, not: Notification) -> Result<()> {
NotificationDispatcher { not: Some(not), global_state: self }
.on::<lsp_types::notification::Cancel>(|this, params| {
@ -792,7 +793,7 @@ fn update_diagnostics(&mut self) {
.filter_map(|file_id| {
handlers::publish_diagnostics(&snapshot, file_id)
.map_err(|err| {
if !is_cancelled(&*err) {
if err.is::<Cancelled>() {
tracing::error!("failed to compute diagnostics: {:?}", err);
}
})