internal: do not drop errors from cargo metadata/check

crates/project_model/src/build_data.rs

@@ -52,7 +52,7 @@ pub struct BuildDataCollector {
     configs: FxHashMap<AbsPathBuf, BuildDataConfig>,
 }
 
-#[derive(Debug, Default, PartialEq, Eq)]
+#[derive(Debug, Default, PartialEq, Eq, Clone)]
 pub struct BuildDataResult {
     data: FxHashMap<AbsPathBuf, BuildDataMap>,
 }

crates/rust-analyzer/src/config.rs

@@ -445,8 +445,8 @@ impl Config {
     pub fn hover_actions(&self) -> bool {
         self.experimental("hoverActions")
     }
-    pub fn status_notification(&self) -> bool {
-        self.experimental("statusNotification")
+    pub fn server_status_notification(&self) -> bool {
+        self.experimental("serverStatusNotification")
     }
 
     pub fn publish_diagnostics(&self) -> bool {

crates/rust-analyzer/src/global_state.rs

@@ -23,6 +23,7 @@ use crate::{
     document::DocumentData,
     from_proto,
     line_index::{LineEndings, LineIndex},
+    lsp_ext,
     main_loop::Task,
     op_queue::OpQueue,
     reload::SourceRootConfig,
@@ -32,20 +33,6 @@ use crate::{
     Result,
 };
 
-#[derive(Eq, PartialEq, Copy, Clone)]
-pub(crate) enum Status {
-    Loading,
-    Ready { partial: bool },
-    Invalid,
-    NeedsReload,
-}
-
-impl Default for Status {
-    fn default() -> Self {
-        Status::Loading
-    }
-}
-
 // Enforces drop order
 pub(crate) struct Handle<H, C> {
     pub(crate) handle: H,
@@ -67,26 +54,36 @@ pub(crate) struct GlobalState {
     req_queue: ReqQueue,
     pub(crate) task_pool: Handle<TaskPool<Task>, Receiver<Task>>,
     pub(crate) loader: Handle<Box<dyn vfs::loader::Handle>, Receiver<vfs::loader::Message>>,
-    pub(crate) vfs_config_version: u32,
-    pub(crate) flycheck: Vec<FlycheckHandle>,
-    pub(crate) flycheck_sender: Sender<flycheck::Message>,
-    pub(crate) flycheck_receiver: Receiver<flycheck::Message>,
     pub(crate) config: Arc<Config>,
     pub(crate) analysis_host: AnalysisHost,
     pub(crate) diagnostics: DiagnosticCollection,
     pub(crate) mem_docs: FxHashMap<VfsPath, DocumentData>,
     pub(crate) semantic_tokens_cache: Arc<Mutex<FxHashMap<Url, SemanticTokens>>>,
-    pub(crate) vfs: Arc<RwLock<(vfs::Vfs, FxHashMap<FileId, LineEndings>)>>,
     pub(crate) shutdown_requested: bool,
-    pub(crate) status: Status,
+    pub(crate) last_reported_status: Option<lsp_ext::ServerStatusParams>,
     pub(crate) source_root_config: SourceRootConfig,
     pub(crate) proc_macro_client: Option<ProcMacroClient>,
 
-    pub(crate) workspaces: Arc<Vec<ProjectWorkspace>>,
-    pub(crate) fetch_workspaces_queue: OpQueue<(), ()>,
+    pub(crate) flycheck: Vec<FlycheckHandle>,
+    pub(crate) flycheck_sender: Sender<flycheck::Message>,
+    pub(crate) flycheck_receiver: Receiver<flycheck::Message>,
 
+    pub(crate) vfs: Arc<RwLock<(vfs::Vfs, FxHashMap<FileId, LineEndings>)>>,
+    pub(crate) vfs_config_version: u32,
+    pub(crate) vfs_progress_config_version: u32,
+    pub(crate) vfs_progress_n_total: usize,
+    pub(crate) vfs_progress_n_done: usize,
+
+    /// For both `workspaces` and `workspace_build_data`, the field stores the
+    /// data we actually use, while the `OpQueue` stores the result of the last
+    /// fetch.
+    ///
+    /// If the fetch (partially) fails, we do not update the values.
+    pub(crate) workspaces: Arc<Vec<ProjectWorkspace>>,
+    pub(crate) fetch_workspaces_queue: OpQueue<(), Vec<anyhow::Result<ProjectWorkspace>>>,
     pub(crate) workspace_build_data: Option<BuildDataResult>,
-    pub(crate) fetch_build_data_queue: OpQueue<BuildDataCollector, ()>,
+    pub(crate) fetch_build_data_queue:
+        OpQueue<BuildDataCollector, Option<anyhow::Result<BuildDataResult>>>,
 
     latest_requests: Arc<RwLock<LatestRequests>>,
 }
@@ -124,25 +121,32 @@ impl GlobalState {
         GlobalState {
             sender,
             req_queue: ReqQueue::default(),
-            vfs_config_version: 0,
             task_pool,
             loader,
-            flycheck: Vec::new(),
-            flycheck_sender,
-            flycheck_receiver,
             config: Arc::new(config),
             analysis_host,
             diagnostics: Default::default(),
             mem_docs: FxHashMap::default(),
             semantic_tokens_cache: Arc::new(Default::default()),
-            vfs: Arc::new(RwLock::new((vfs::Vfs::default(), FxHashMap::default()))),
             shutdown_requested: false,
-            status: Status::default(),
+            last_reported_status: None,
             source_root_config: SourceRootConfig::default(),
             proc_macro_client: None,
+
+            flycheck: Vec::new(),
+            flycheck_sender,
+            flycheck_receiver,
+
+            vfs: Arc::new(RwLock::new((vfs::Vfs::default(), FxHashMap::default()))),
+            vfs_config_version: 0,
+            vfs_progress_config_version: 0,
+            vfs_progress_n_total: 0,
+            vfs_progress_n_done: 0,
+
             workspaces: Arc::new(Vec::new()),
             fetch_workspaces_queue: OpQueue::default(),
             workspace_build_data: None,
+
             fetch_build_data_queue: OpQueue::default(),
             latest_requests: Default::default(),
         }

crates/rust-analyzer/src/lsp_ext.rs

@@ -241,26 +241,26 @@ pub struct SsrParams {
     pub selections: Vec<lsp_types::Range>,
 }
 
-pub enum StatusNotification {}
+pub enum ServerStatusNotification {}
 
-#[derive(Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub enum Status {
-    Loading,
-    ReadyPartial,
-    Ready,
-    NeedsReload,
-    Invalid,
+impl Notification for ServerStatusNotification {
+    type Params = ServerStatusParams;
+    const METHOD: &'static str = "experimental/serverStatus";
 }
 
-#[derive(Deserialize, Serialize)]
-pub struct StatusParams {
-    pub status: Status,
+#[derive(Deserialize, Serialize, PartialEq, Eq, Clone)]
+pub struct ServerStatusParams {
+    pub health: Health,
+    pub quiescent: bool,
+    pub message: Option<String>,
 }
 
-impl Notification for StatusNotification {
-    type Params = StatusParams;
-    const METHOD: &'static str = "rust-analyzer/status";
+#[derive(Serialize, Deserialize, Clone, Copy, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+pub enum Health {
+    Ok,
+    Warning,
+    Error,
 }
 
 pub enum CodeActionRequest {}

crates/rust-analyzer/src/main_loop.rs

@@ -2,6 +2,7 @@
 //! requests/replies and notifications back to the client.
 use std::{
     env, fmt,
+    sync::Arc,
     time::{Duration, Instant},
 };
 
@@ -12,14 +13,15 @@ use ide::{Canceled, FileId};
 use ide_db::base_db::VfsPath;
 use lsp_server::{Connection, Notification, Request, Response};
 use lsp_types::notification::Notification as _;
+use project_model::BuildDataCollector;
 use vfs::ChangeKind;
 
 use crate::{
     config::Config,
     dispatch::{NotificationDispatcher, RequestDispatcher},
     document::DocumentData,
     from_proto,
-    global_state::{file_id_to_url, url_to_file_id, GlobalState, Status},
+    global_state::{file_id_to_url, url_to_file_id, GlobalState},
     handlers, lsp_ext,
     lsp_utils::{apply_document_changes, is_canceled, notification_is, Progress},
     reload::{BuildDataProgress, ProjectWorkspaceProgress},
@@ -187,7 +189,7 @@ impl GlobalState {
             log::info!("task queue len: {}", task_queue_len);
         }
 
-        let mut new_status = self.status;
+        let was_quiescent = self.is_quiescent();
         match event {
             Event::Lsp(msg) => match msg {
                 lsp_server::Message::Request(req) => self.on_request(loop_start, req)?,
@@ -227,11 +229,24 @@ impl GlobalState {
                                     (Progress::Report, Some(msg))
                                 }
                                 ProjectWorkspaceProgress::End(workspaces) => {
-                                    self.fetch_workspaces_completed();
-                                    self.switch_workspaces(workspaces, None);
+                                    self.fetch_workspaces_completed(workspaces);
+
+                                    let old = Arc::clone(&self.workspaces);
+                                    self.switch_workspaces();
+                                    let workspaces_updated = !Arc::ptr_eq(&old, &self.workspaces);
+
+                                    if self.config.run_build_scripts() && workspaces_updated {
+                                        let mut collector = BuildDataCollector::default();
+                                        for ws in self.workspaces.iter() {
+                                            ws.collect_build_data_configs(&mut collector);
+                                        }
+                                        self.fetch_build_data_request(collector)
+                                    }
+
                                     (Progress::End, None)
                                 }
                             };
+
                             self.report_progress("fetching", state, msg, None);
                         }
                         Task::FetchBuildData(progress) => {
@@ -240,19 +255,21 @@ impl GlobalState {
                                 BuildDataProgress::Report(msg) => {
                                     (Some(Progress::Report), Some(msg))
                                 }
-                                BuildDataProgress::End(collector) => {
-                                    self.fetch_build_data_completed();
-                                    let workspaces =
-                                        (*self.workspaces).clone().into_iter().map(Ok).collect();
-                                    self.switch_workspaces(workspaces, Some(collector));
+                                BuildDataProgress::End(build_data_result) => {
+                                    self.fetch_build_data_completed(build_data_result);
+
+                                    self.switch_workspaces();
+
                                     (Some(Progress::End), None)
                                 }
                             };
+
                             if let Some(state) = state {
                                 self.report_progress("loading", state, msg, None);
                             }
                         }
                     }
+
                     // Coalesce multiple task events into one loop turn
                     task = match self.task_pool.receiver.try_recv() {
                         Ok(task) => task,
@@ -298,30 +315,25 @@ impl GlobalState {
                         }
                         vfs::loader::Message::Progress { n_total, n_done, config_version } => {
                             always!(config_version <= self.vfs_config_version);
-                            if n_total == 0 {
-                                new_status = Status::Invalid;
+
+                            self.vfs_progress_config_version = config_version;
+                            self.vfs_progress_n_total = n_total;
+                            self.vfs_progress_n_done = n_done;
+
+                            let state = if n_done == 0 {
+                                Progress::Begin
+                            } else if n_done < n_total {
+                                Progress::Report
                             } else {
-                                let state = if n_done == 0 {
-                                    new_status = Status::Loading;
-                                    Progress::Begin
-                                } else if n_done < n_total {
-                                    Progress::Report
-                                } else {
-                                    assert_eq!(n_done, n_total);
-                                    new_status = Status::Ready {
-                                        partial: self.config.run_build_scripts()
-                                            && self.workspace_build_data.is_none()
-                                            || config_version < self.vfs_config_version,
-                                    };
-                                    Progress::End
-                                };
-                                self.report_progress(
-                                    "roots scanned",
-                                    state,
-                                    Some(format!("{}/{}", n_done, n_total)),
-                                    Some(Progress::fraction(n_done, n_total)),
-                                )
-                            }
+                                assert_eq!(n_done, n_total);
+                                Progress::End
+                            };
+                            self.report_progress(
+                                "roots scanned",
+                                state,
+                                Some(format!("{}/{}", n_done, n_total)),
+                                Some(Progress::fraction(n_done, n_total)),
+                            )
                         }
                     }
                     // Coalesce many VFS event into a single loop turn
@@ -397,18 +409,14 @@ impl GlobalState {
         }
 
         let state_changed = self.process_changes();
-        let prev_status = self.status;
-        if prev_status != new_status {
-            self.transition(new_status);
-        }
-        let is_ready = matches!(self.status, Status::Ready { .. });
-        if prev_status == Status::Loading && is_ready {
+
+        if self.is_quiescent() && !was_quiescent {
             for flycheck in &self.flycheck {
                 flycheck.update();
             }
         }
 
-        if is_ready && (state_changed || prev_status == Status::Loading) {
+        if self.is_quiescent() && (!was_quiescent || state_changed) {
             self.update_file_notifications_on_threadpool();
 
             // Refresh semantic tokens if the client supports it.
@@ -437,9 +445,13 @@ impl GlobalState {
             }
         }
 
-        self.fetch_workspaces_if_needed();
+        if self.config.cargo_autoreload() {
+            self.fetch_workspaces_if_needed();
+        }
         self.fetch_build_data_if_needed();
 
+        self.report_new_status_if_needed();
+
         let loop_duration = loop_start.elapsed();
         if loop_duration > Duration::from_millis(100) {
             log::warn!("overly long loop turn: {:?}", loop_duration);
@@ -466,7 +478,8 @@ impl GlobalState {
             return Ok(());
         }
 
-        if self.status == Status::Loading && req.method != "shutdown" {
+        // Avoid flashing a bunch of unresolved references during initial load.
+        if self.workspaces.is_empty() && !self.is_quiescent() {
             self.respond(lsp_server::Response::new_err(
                 req.id,
                 // FIXME: i32 should impl From<ErrorCode> (from() guarantees lossless conversion)
@@ -477,7 +490,11 @@ impl GlobalState {
         }
 
         RequestDispatcher { req: Some(req), global_state: self }
-            .on_sync::<lsp_ext::ReloadWorkspace>(|s, ()| Ok(s.fetch_workspaces_request()))?
+            .on_sync::<lsp_ext::ReloadWorkspace>(|s, ()| {
+                s.fetch_workspaces_request();
+                s.fetch_workspaces_if_needed();
+                Ok(())
+            })?
             .on_sync::<lsp_ext::JoinLines>(|s, p| handlers::handle_join_lines(s.snapshot(), p))?
             .on_sync::<lsp_ext::OnEnter>(|s, p| handlers::handle_on_enter(s.snapshot(), p))?
             .on_sync::<lsp_types::request::Shutdown>(|s, ()| {