3 files changed, 34 insertions, 33 deletions

diff --git a/crates/ra_flycheck/src/lib.rs b/crates/ra_flycheck/src/lib.rs
index f6f9171ad..75aece45f 100644
--- a/crates/ra_flycheck/src/lib.rs
+++ b/crates/ra_flycheck/src/lib.rs
@@ -24,33 +24,32 @@ pub use crate::conv::url_from_path_with_drive_lowercasing;
 
 #[derive(Clone, Debug)]
 pub struct CheckConfig {
-    pub enable: bool,
     pub args: Vec<String>,
     pub command: String,
     pub all_targets: bool,
 }
 
-/// CheckWatcher wraps the shared state and communication machinery used for
+/// Flycheck wraps the shared state and communication machinery used for
 /// running `cargo check` (or other compatible command) and providing
 /// diagnostics based on the output.
 /// The spawned thread is shut down when this struct is dropped.
 #[derive(Debug)]
-pub struct CheckWatcher {
+pub struct Flycheck {
     // XXX: drop order is significant
     cmd_send: Sender<CheckCommand>,
-    handle: Option<jod_thread::JoinHandle<()>>,
+    handle: jod_thread::JoinHandle<()>,
     pub task_recv: Receiver<CheckTask>,
 }
 
-impl CheckWatcher {
-    pub fn new(config: CheckConfig, workspace_root: PathBuf) -> CheckWatcher {
+impl Flycheck {
+    pub fn new(config: CheckConfig, workspace_root: PathBuf) -> Flycheck {
         let (task_send, task_recv) = unbounded::<CheckTask>();
         let (cmd_send, cmd_recv) = unbounded::<CheckCommand>();
         let handle = jod_thread::spawn(move || {
-            let mut check = CheckWatcherThread::new(config, workspace_root);
+            let mut check = FlycheckThread::new(config, workspace_root);
             check.run(&task_send, &cmd_recv);
         });
-        CheckWatcher { task_recv, cmd_send, handle: Some(handle) }
+        Flycheck { task_recv, cmd_send, handle }
     }
 
     /// Schedule a re-start of the cargo check worker.
@@ -76,7 +75,7 @@ pub enum CheckCommand {
     Update,
 }
 
-struct CheckWatcherThread {
+struct FlycheckThread {
     options: CheckConfig,
     workspace_root: PathBuf,
     last_update_req: Option<Instant>,
@@ -90,9 +89,9 @@ struct CheckWatcherThread {
     check_process: Option<jod_thread::JoinHandle<()>>,
 }
 
-impl CheckWatcherThread {
-    fn new(options: CheckConfig, workspace_root: PathBuf) -> CheckWatcherThread {
-        CheckWatcherThread {
+impl FlycheckThread {
+    fn new(options: CheckConfig, workspace_root: PathBuf) -> FlycheckThread {
+        FlycheckThread {
             options,
             workspace_root,
             last_update_req: None,
@@ -216,9 +215,6 @@ impl CheckWatcherThread {
         // First, clear and cancel the old thread
         self.message_recv = never();
         self.check_process = None;
-        if !self.options.enable {
-            return;
-        }
 
         let mut args: Vec<String> = vec![
             self.options.command.clone(),
diff --git a/crates/rust-analyzer/src/main_loop.rs b/crates/rust-analyzer/src/main_loop.rs
index bb33fb27d..79dc03de4 100644
--- a/crates/rust-analyzer/src/main_loop.rs
+++ b/crates/rust-analyzer/src/main_loop.rs
@@ -101,11 +101,14 @@ fn get_config(
             chaining_hints: config.inlay_hints_chaining,
             max_length: config.inlay_hints_max_length,
         },
-        check: CheckConfig {
-            enable: config.cargo_watch_enable,
-            args: config.cargo_watch_args.clone(),
-            command: config.cargo_watch_command.clone(),
-            all_targets: config.cargo_watch_all_targets,
+        check: if config.cargo_watch_enable {
+            Some(CheckConfig {
+                args: config.cargo_watch_args.clone(),
+                command: config.cargo_watch_command.clone(),
+                all_targets: config.cargo_watch_all_targets,
+            })
+        } else {
+            None
         },
         rustfmt_args: config.rustfmt_args.clone(),
         vscode_lldb: config.vscode_lldb,
@@ -240,7 +243,7 @@ pub fn main_loop(
                     Err(RecvError) => return Err("vfs died".into()),
                 },
                 recv(libdata_receiver) -> data => Event::Lib(data.unwrap()),
-                recv(world_state.check_watcher.as_ref().map_or(&never(), |it| &it.task_recv)) -> task => match task {
+                recv(world_state.flycheck.as_ref().map_or(&never(), |it| &it.task_recv)) -> task => match task {
                     Ok(task) => Event::CheckWatcher(task),
                     Err(RecvError) => return Err("check watcher died".into()),
                 }
@@ -481,8 +484,8 @@ fn loop_turn(
         && loop_state.in_flight_libraries == 0
     {
         loop_state.workspace_loaded = true;
-        if let Some(check_watcher) = &world_state.check_watcher {
-            check_watcher.update();
+        if let Some(flycheck) = &world_state.flycheck {
+            flycheck.update();
         }
         pool.execute({
             let subs = loop_state.subscriptions.subscriptions();
@@ -654,8 +657,8 @@ fn on_notification(
     };
     let not = match notification_cast::<req::DidSaveTextDocument>(not) {
         Ok(_params) => {
-            if let Some(check_watcher) = &state.check_watcher {
-                check_watcher.update();
+            if let Some(flycheck) = &state.flycheck {
+                flycheck.update();
             }
             return Ok(());
         }
diff --git a/crates/rust-analyzer/src/world.rs b/crates/rust-analyzer/src/world.rs
index acb729bae..7814a682e 100644
--- a/crates/rust-analyzer/src/world.rs
+++ b/crates/rust-analyzer/src/world.rs
@@ -11,7 +11,7 @@ use std::{
 use crossbeam_channel::{unbounded, Receiver};
 use lsp_types::Url;
 use parking_lot::RwLock;
-use ra_flycheck::{url_from_path_with_drive_lowercasing, CheckConfig, CheckWatcher};
+use ra_flycheck::{url_from_path_with_drive_lowercasing, CheckConfig, Flycheck};
 use ra_ide::{
     Analysis, AnalysisChange, AnalysisHost, CrateGraph, FileId, InlayHintsConfig, LibraryData,
     SourceRootId,
@@ -31,7 +31,9 @@ use crate::{
 use ra_db::ExternSourceId;
 use rustc_hash::{FxHashMap, FxHashSet};
 
-fn create_watcher(workspaces: &[ProjectWorkspace], config: &Config) -> Option<CheckWatcher> {
+fn create_flycheck(workspaces: &[ProjectWorkspace], config: &Config) -> Option<Flycheck> {
+    let check_config = config.check.as_ref()?;
+
     // FIXME: Figure out the multi-workspace situation
     workspaces
         .iter()
@@ -41,7 +43,7 @@ fn create_watcher(workspaces: &[ProjectWorkspace], config: &Config) -> Option<Ch
         })
         .map(|cargo| {
             let cargo_project_root = cargo.workspace_root().to_path_buf();
-            Some(CheckWatcher::new(config.check.clone(), cargo_project_root))
+            Some(Flycheck::new(check_config.clone(), cargo_project_root))
         })
         .unwrap_or_else(|| {
             log::warn!("Cargo check watching only supported for cargo workspaces, disabling");
@@ -56,7 +58,7 @@ pub struct Config {
     pub line_folding_only: bool,
     pub inlay_hints: InlayHintsConfig,
     pub rustfmt_args: Vec<String>,
-    pub check: CheckConfig,
+    pub check: Option<CheckConfig>,
     pub vscode_lldb: bool,
     pub proc_macro_srv: Option<String>,
 }
@@ -76,7 +78,7 @@ pub struct WorldState {
     pub vfs: Arc<RwLock<Vfs>>,
     pub task_receiver: Receiver<VfsTask>,
     pub latest_requests: Arc<RwLock<LatestRequests>>,
-    pub check_watcher: Option<CheckWatcher>,
+    pub flycheck: Option<Flycheck>,
     pub diagnostics: DiagnosticCollection,
 }
 
@@ -201,7 +203,7 @@ impl WorldState {
             });
         change.set_crate_graph(crate_graph);
 
-        let check_watcher = create_watcher(&workspaces, &config);
+        let flycheck = create_flycheck(&workspaces, &config);
 
         let mut analysis_host = AnalysisHost::new(lru_capacity);
         analysis_host.apply_change(change);
@@ -214,7 +216,7 @@ impl WorldState {
             vfs: Arc::new(RwLock::new(vfs)),
             task_receiver,
             latest_requests: Default::default(),
-            check_watcher,
+            flycheck,
             diagnostics: Default::default(),
         }
     }
@@ -227,7 +229,7 @@ impl WorldState {
     ) {
         self.feature_flags = Arc::new(feature_flags);
         self.analysis_host.update_lru_capacity(lru_capacity);
-        self.check_watcher = create_watcher(&self.workspaces, &config);
+        self.flycheck = create_flycheck(&self.workspaces, &config);
         self.config = config;
     }