3 files changed, 18 insertions, 6 deletions

diff --git a/crates/ra_lsp_server/src/init.rs b/crates/ra_lsp_server/src/init.rs
index 1b77e0312..b894b449d 100644
--- a/crates/ra_lsp_server/src/init.rs
+++ b/crates/ra_lsp_server/src/init.rs
@@ -17,11 +17,17 @@ pub struct InitializationOptions {
     /// Defaults to `true`
     #[serde(deserialize_with = "nullable_bool_true")]
     pub show_workspace_loaded: bool,
+
+    pub lru_capacity: Option<usize>,
 }
 
 impl Default for InitializationOptions {
     fn default() -> InitializationOptions {
-        InitializationOptions { publish_decorations: false, show_workspace_loaded: true }
+        InitializationOptions {
+            publish_decorations: false,
+            show_workspace_loaded: true,
+            lru_capacity: None,
+        }
     }
 }
 
@@ -54,8 +60,10 @@ mod test {
         assert_eq!(default, serde_json::from_str(r#"{}"#).unwrap());
         assert_eq!(
             default,
-            serde_json::from_str(r#"{"publishDecorations":null, "showWorkspaceLoaded":null}"#)
-                .unwrap()
+            serde_json::from_str(
+                r#"{"publishDecorations":null, "showWorkspaceLoaded":null, "lruCapacity":null}"#
+            )
+            .unwrap()
         );
     }
 }
diff --git a/crates/ra_lsp_server/src/main_loop.rs b/crates/ra_lsp_server/src/main_loop.rs
index 090fb9b1b..0790ea472 100644
--- a/crates/ra_lsp_server/src/main_loop.rs
+++ b/crates/ra_lsp_server/src/main_loop.rs
@@ -73,7 +73,7 @@ pub fn main_loop(
         loaded_workspaces
     };
 
-    let mut state = WorldState::new(ws_roots, workspaces);
+    let mut state = WorldState::new(ws_roots, workspaces, options.lru_capacity);
 
     let pool = ThreadPool::new(THREADPOOL_SIZE);
     let (task_sender, task_receiver) = unbounded::<Task>();
diff --git a/crates/ra_lsp_server/src/world.rs b/crates/ra_lsp_server/src/world.rs
index cd8df4fdb..f9ce570ca 100644
--- a/crates/ra_lsp_server/src/world.rs
+++ b/crates/ra_lsp_server/src/world.rs
@@ -46,7 +46,11 @@ pub struct WorldSnapshot {
 }
 
 impl WorldState {
-    pub fn new(folder_roots: Vec<PathBuf>, workspaces: Vec<ProjectWorkspace>) -> WorldState {
+    pub fn new(
+        folder_roots: Vec<PathBuf>,
+        workspaces: Vec<ProjectWorkspace>,
+        lru_capacity: Option<usize>,
+    ) -> WorldState {
         let mut change = AnalysisChange::new();
 
         let mut roots = Vec::new();
@@ -74,7 +78,7 @@ impl WorldState {
         }
         change.set_crate_graph(crate_graph);
 
-        let mut analysis_host = AnalysisHost::default();
+        let mut analysis_host = AnalysisHost::new(lru_capacity);
         analysis_host.apply_change(change);
         WorldState {
             roots_to_scan,