Auto-start watcher when workspace is accessed and add tests

Author: doITmagic

internal/workspace/manager.go

@@ -287,6 +287,9 @@ func (m *Manager) GetMemoryForWorkspaceLanguage(ctx context.Context, info *Info,
 		)
 	}
 
+	// Ensure filesystem watcher is running so future changes trigger reindex automatically
+	m.StartWatcher(info.Root)
+
 	collectionName := info.CollectionNameForLanguage(language)
 
 	// Check memory cache

internal/workspace/watcher_test.go

@@ -0,0 +1,36 @@
+package workspace
+
+import "testing"
+
+func TestManagerStartWatcherRegistersWatcher(t *testing.T) {
+	root := t.TempDir()
+
+	mgr := &Manager{
+		watchers: make(map[string]*FileWatcher),
+	}
+
+	mgr.StartWatcher(root)
+
+	mgr.watchersMu.Lock()
+	watcher, ok := mgr.watchers[root]
+	mgr.watchersMu.Unlock()
+	if !ok {
+		t.Fatalf("expected watcher for %s", root)
+	}
+	if watcher == nil {
+		t.Fatalf("watcher for %s is nil", root)
+	}
+	t.Cleanup(watcher.Stop)
+
+	// Starting the watcher again for the same root should reuse the same instance
+	mgr.StartWatcher(root)
+
+	mgr.watchersMu.Lock()
+	defer mgr.watchersMu.Unlock()
+	if len(mgr.watchers) != 1 {
+		t.Fatalf("expected exactly one watcher, got %d", len(mgr.watchers))
+	}
+	if mgr.watchers[root] != watcher {
+		t.Fatalf("expected watcher instance to be reused for %s", root)
+	}
+}