Auto merge of #13428 - Veykril:fmt-stuck, r=Veykril

fix: Fix formatting requests hanging when r-a is still starting

The reason for that was that we were calculating the crate defmaps of the file we are saving by accident causing us to get stuck waiting on their expensive computation, while we only need the relevant crate id.

Closes #4054
Closes #11654

Author: bors

crates/ide/src/lib.rs

@@ -482,8 +482,8 @@ impl Analysis {
     }
 
     /// Returns crates this file belongs too.
-    pub fn crate_for(&self, file_id: FileId) -> Cancellable<Vec<CrateId>> {
-        self.with_db(|db| parent_module::crate_for(db, file_id))
+    pub fn crates_for(&self, file_id: FileId) -> Cancellable<Vec<CrateId>> {
+        self.with_db(|db| parent_module::crates_for(db, file_id))
     }
 
     /// Returns the edition of the given crate.

crates/ide/src/parent_module.rs

@@ -1,9 +1,8 @@
 use hir::Semantics;
 use ide_db::{
-    base_db::{CrateId, FileId, FilePosition},
+    base_db::{CrateId, FileId, FileLoader, FilePosition},
     RootDatabase,
 };
-use itertools::Itertools;
 use syntax::{
     algo::find_node_at_offset,
     ast::{self, AstNode},
@@ -55,9 +54,8 @@ pub(crate) fn parent_module(db: &RootDatabase, position: FilePosition) -> Vec<Na
 }
 
 /// Returns `Vec` for the same reason as `parent_module`
-pub(crate) fn crate_for(db: &RootDatabase, file_id: FileId) -> Vec<CrateId> {
-    let sema = Semantics::new(db);
-    sema.to_module_defs(file_id).map(|module| module.krate().into()).unique().collect()
+pub(crate) fn crates_for(db: &RootDatabase, file_id: FileId) -> Vec<CrateId> {
+    db.relevant_crates(file_id).iter().copied().collect()
 }
 
 #[cfg(test)]
@@ -147,7 +145,7 @@ $0
 mod foo;
 "#,
         );
-        assert_eq!(analysis.crate_for(file_id).unwrap().len(), 1);
+        assert_eq!(analysis.crates_for(file_id).unwrap().len(), 1);
     }
 
     #[test]
@@ -162,6 +160,6 @@ mod baz;
 mod baz;
 "#,
         );
-        assert_eq!(analysis.crate_for(file_id).unwrap().len(), 2);
+        assert_eq!(analysis.crates_for(file_id).unwrap().len(), 2);
     }
 }

crates/ide/src/status.rs

@@ -45,7 +45,7 @@ pub(crate) fn status(db: &RootDatabase, file_id: Option<FileId>) -> String {
 
     if let Some(file_id) = file_id {
         format_to!(buf, "\nFile info:\n");
-        let crates = crate::parent_module::crate_for(db, file_id);
+        let crates = crate::parent_module::crates_for(db, file_id);
         if crates.is_empty() {
             format_to!(buf, "Does not belong to any crate");
         }

crates/rust-analyzer/src/cargo_target_spec.rs

@@ -118,7 +118,7 @@ impl CargoTargetSpec {
         global_state_snapshot: &GlobalStateSnapshot,
         file_id: FileId,
     ) -> Result<Option<CargoTargetSpec>> {
-        let crate_id = match &*global_state_snapshot.analysis.crate_for(file_id)? {
+        let crate_id = match &*global_state_snapshot.analysis.crates_for(file_id)? {
             &[crate_id, ..] => crate_id,
             _ => return Ok(None),
         };

crates/rust-analyzer/src/dispatch.rs

@@ -52,7 +52,7 @@ impl<'a> RequestDispatcher<'a> {
             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) {
+        if let Ok(response) = result_to_response::<R>(req.id, result) {
             self.global_state.respond(response);
         }
 
@@ -80,7 +80,7 @@ impl<'a> RequestDispatcher<'a> {
             f(global_state_snapshot, params)
         });
 
-        if let Ok(response) = thread_result_to_response::<R>(req.id.clone(), result) {
+        if let Ok(response) = thread_result_to_response::<R>(req.id, result) {
             self.global_state.respond(response);
         }
 

crates/rust-analyzer/src/handlers.rs

@@ -658,7 +658,7 @@ pub(crate) fn handle_parent_module(
 
         // check if invoked at the crate root
         let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
-        let crate_id = match snap.analysis.crate_for(file_id)?.first() {
+        let crate_id = match snap.analysis.crates_for(file_id)?.first() {
             Some(&crate_id) => crate_id,
             None => return Ok(None),
         };
@@ -1782,7 +1782,7 @@ fn run_rustfmt(
 ) -> Result<Option<Vec<lsp_types::TextEdit>>> {
     let file_id = from_proto::file_id(snap, &text_document.uri)?;
     let file = snap.analysis.file_text(file_id)?;
-    let crate_ids = snap.analysis.crate_for(file_id)?;
+    let crate_ids = snap.analysis.crates_for(file_id)?;
 
     let line_index = snap.file_line_index(file_id)?;
 

crates/rust-analyzer/src/main_loop.rs

@@ -783,7 +783,7 @@ impl GlobalState {
                         let analysis = this.analysis_host.analysis();
                         // Crates containing or depending on the saved file
                         let crate_ids: Vec<_> = analysis
-                            .crate_for(file_id)?
+                            .crates_for(file_id)?
                             .into_iter()
                             .flat_map(|id| {
                                 this.analysis_host