Merge #3666

3666: Reload part of the server configuration without restarts r=matklad a=SomeoneToIgnore

Partially addresses https://github.com/rust-analyzer/rust-analyzer/issues/2857

Closes #3751

Reloads all server configuration that's not related to VFS without restarts.

The VFS-related parameters are not considered, since VFS is planned to be rewritten/replaced in the future and I have a suspicion that with the current code, swapping the VFS and the file watchers on the fly will cause big troubles.

I have to store and process the config request id separately, since the `workspace/configuration` response returns `any[]` (https://microsoft.github.io/language-server-protocol/specifications/specification-current/#workspace_configuration), if there's a better way to handle those responses, let me know.



Co-authored-by: Kirill Bulatov <[email protected]>

1 files changed, 8 insertions, 4 deletions

diff --git a/crates/ra_ide_db/src/lib.rs b/crates/ra_ide_db/src/lib.rs
index 4faeefa8d..e6f2d36e9 100644
--- a/crates/ra_ide_db/src/lib.rs
+++ b/crates/ra_ide_db/src/lib.rs
@@ -115,12 +115,16 @@ impl RootDatabase {
         db.set_crate_graph_with_durability(Default::default(), Durability::HIGH);
         db.set_local_roots_with_durability(Default::default(), Durability::HIGH);
         db.set_library_roots_with_durability(Default::default(), Durability::HIGH);
-        let lru_capacity = lru_capacity.unwrap_or(ra_db::DEFAULT_LRU_CAP);
-        db.query_mut(ra_db::ParseQuery).set_lru_capacity(lru_capacity);
-        db.query_mut(hir::db::ParseMacroQuery).set_lru_capacity(lru_capacity);
-        db.query_mut(hir::db::MacroExpandQuery).set_lru_capacity(lru_capacity);
+        db.update_lru_capacity(lru_capacity);
         db
     }
+
+    pub fn update_lru_capacity(&mut self, lru_capacity: Option<usize>) {
+        let lru_capacity = lru_capacity.unwrap_or(ra_db::DEFAULT_LRU_CAP);
+        self.query_mut(ra_db::ParseQuery).set_lru_capacity(lru_capacity);
+        self.query_mut(hir::db::ParseMacroQuery).set_lru_capacity(lru_capacity);
+        self.query_mut(hir::db::MacroExpandQuery).set_lru_capacity(lru_capacity);
+    }
 }
 
 impl salsa::ParallelDatabase for RootDatabase {