From 29b57c2bd6bcaa03d5e15ec4469ca766714d3fa7 Mon Sep 17 00:00:00 2001
From: Mark Sujew <mark.sujew@typefox.io>
Date: Mon, 8 Apr 2024 10:17:02 +0200
Subject: [PATCH] Update diagnostics for deleted files (#1441)

---
 packages/langium/src/lsp/language-server.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/packages/langium/src/lsp/language-server.ts b/packages/langium/src/lsp/language-server.ts
index 7520447b2..b74584e5e 100644
--- a/packages/langium/src/lsp/language-server.ts
+++ b/packages/langium/src/lsp/language-server.ts
@@ -298,6 +298,14 @@ export function addFileOperationHandler(connection: Connection, services: Langiu
 
 export function addDiagnosticsHandler(connection: Connection, services: LangiumSharedServices): void {
     const documentBuilder = services.workspace.DocumentBuilder;
+    documentBuilder.onUpdate(async (_, deleted) => {
+        for (const uri of deleted) {
+            connection.sendDiagnostics({
+                uri: uri.toString(),
+                diagnostics: []
+            });
+        }
+    });
     documentBuilder.onBuildPhase(DocumentState.Validated, async (documents, cancelToken) => {
         for (const document of documents) {
             if (document.diagnostics) {