watch compile_commands.json file changes

source/served/extension.d

@@ -1028,6 +1028,39 @@ void onDidSaveDocument(DidSaveTextDocumentParams params)
 	}
 }
 
+@protocolNotification("workspace/didChangeWatchedFiles")
+void onDidChangeWatchedFiles(DidChangeWatchedFilesParams params)
+{
+	foreach (c; params.changes)
+	{
+		trace("watched file did change: ", c);
+
+		string filename = c.uri.uriToFile;
+
+		auto inst = backend.getBestInstance!ClangCompilationDatabaseComponent(filename);
+		if (!inst)
+			continue;
+
+		string ccdbPath = inst.get!ClangCompilationDatabaseComponent.getDbPath();
+		if (!ccdbPath)
+			continue;
+
+		filename = filename.buildNormalizedPath();
+
+		if (filename == ccdbPath)
+		{
+			if (c.type == FileChangeType.deleted)
+			{
+				filename = discoverCcdb(inst.cwd);
+				tracef("CCDB file deleted. Switching from %s to %s", ccdbPath, filename ? filename : "(null)");
+			}
+
+			tracef("will (re)load %s", filename);
+			inst.get!ClangCompilationDatabaseComponent.setDbPath(filename);
+		}
+	}
+}
+
 shared static this()
 {
 	import core.time : MonoTime;