func newWatcher(s store.Store, opts store.QueryServiceOptions) *watcher {
w := &watcher{stopCh: make(chan struct{}), done: make(chan struct{})}
changes := make(chan data.ServiceChange)
ctx, cancel := context.WithCancel(context.Background())
s.WatchServices(ctx, changes, daemon.NewErrorSink(), opts)
go func() {
defer close(w.done)
for {
select {
case change := <-changes:
w.changes = append(w.changes, change)
case <-w.stopCh:
cancel()
return
}
}
}()
return w
}
