all: imp code

internal/aghnet/hostscontainer.go

@@ -161,7 +161,8 @@ func (hc *HostsContainer) handleEvents() {
 
 	defer close(hc.updates)
 
-	ok, eventsCh := true, hc.watcher.Events()
+	eventsCh := hc.watcher.Events()
+	ok := eventsCh != nil
 	for ok {
 		select {
 		case _, ok = <-eventsCh:

internal/aghos/fswatcher.go

@@ -168,22 +168,26 @@ type EmptyFSWatcher struct{}
 // type check
 var _ FSWatcher = EmptyFSWatcher{}
 
-// Start implements the [FSWatcher] interface for EmptyFSWatcher.
+// Start implements the [FSWatcher] interface for EmptyFSWatcher.  It always
+// returns nil error.
 func (EmptyFSWatcher) Start() (err error) {
 	return nil
 }
 
-// Close implements the [FSWatcher] interface for EmptyFSWatcher.
+// Close implements the [FSWatcher] interface for EmptyFSWatcher.  It always
+// returns nil error.
 func (EmptyFSWatcher) Close() (err error) {
 	return nil
 }
 
-// Events implements the [FSWatcher] interface for EmptyFSWatcher.
+// Events implements the [FSWatcher] interface for EmptyFSWatcher.  It always
+// returns nil channel.
 func (EmptyFSWatcher) Events() (e <-chan event) {
 	return nil
 }
 
-// Add implements the [FSWatcher] interface for EmptyFSWatcher.
+// Add implements the [FSWatcher] interface for EmptyFSWatcher.  It always
+// returns nil error.
 func (EmptyFSWatcher) Add(_ string) (err error) {
 	return nil
 }