return err
	}
	watcher := recursiveWatcher{fs}
	if err = watcher.watchRecursive(path); err != nil {
		return err
	}
	go func() {
		defer watcher.Close()
		var debounceC <-chan time.Time
		for {
			select {
			case <-debounceC:
				debounceC = nil
				ch <- struct{}{}
			case e := <-watcher.Events:
				s, err := os.Stat(e.Name)
				if err == nil && s != nil && s.IsDir() {

// limitations under the License.

package concurrent

import (
	"time"

	"istio.io/istio/pkg/util/sets"
)

type Debouncer[T comparable] struct{}

func (d *Debouncer[T]) Run(ch chan T, stopCh <-chan struct{}, debounceMinInterval, debounceMaxInterval time.Duration, pushFn func(sets.Set[T])) {
	var timeChan <-chan time.Time
	var startDebounce time.Time

func (s *DiscoveryServer) handleUpdates(stopCh <-chan struct{}) {
	debounce(s.pushChannel, stopCh, s.DebounceOptions, s.Push, s.CommittedUpdates)
}

// The debounce helper function is implemented to enable mocking
func debounce(ch chan *model.PushRequest, stopCh <-chan struct{}, opts DebounceOptions, pushFn func(req *model.PushRequest), updateSent *atomic.Int64) {

		enableEDSDebounce: false,
	}

	tests := []struct {
		name string
		test func(updateCh chan *model.PushRequest, expect func(partial, full int32))
	}{
		{
			name: "Should not debounce partial pushes",
			test: func(updateCh chan *model.PushRequest, expect func(partial, full int32)) {
				updateCh <- &model.PushRequest{Full: false}
				expect(1, 0)
				updateCh <- &model.PushRequest{Full: false}

	addTestClientEndpoints(s.MemRegistry)
	s.MemRegistry.AddHTTPService(edsIncSvc, edsIncVip, 8080)
	s.MemRegistry.SetEndpoints(edsIncSvc, "",
		newEndpointWithAccount("127.0.0.1", "hello-sa", "v1"))
	// Wait until the above debounce, to ensure we can precisely check XDS responses without spurious pushes
	s.EnsureSynced(t)

	ads := s.ConnectDeltaADS().WithID("sidecar~127.0.0.1~test.default~default.svc.cluster.local")

	// Initially we get everything

		}
		return status
	})
	return &Controller{analyzer: ia, statusctl: ctl}, nil
}

// Run is blocking
func (c *Controller) Run(stop <-chan struct{}) {
	db := concurrent.Debouncer[config.GroupVersionKind]{}
	chKind := make(chan config.GroupVersionKind, 10)

	for _, k := range c.analyzer.Schemas().All() {

	_ = fileWatcher.Add(file)
	go func() {
		var timerC <-chan time.Time
		for {
			select {
			case <-timerC:
				timerC = nil
				callback()
			case <-fileWatcher.Events(file):
				// Use a timer to debounce configuration updates
				if timerC == nil {
					timerC = time.After(100 * time.Millisecond)
				}
			}
		}
	}()
}

func PrettyFormatOfMeshConfig(meshConfig *meshconfig.MeshConfig) string {

					log.Errorf("update error: %v", err)
				}
			}
		case event, ok := <-w.watcher.Events:
			if !ok {
				return
			}
			log.Debugf("Injector watch update: %+v", event)
			// use a timer to debounce configuration updates
			if (event.Has(fsnotify.Write) || event.Has(fsnotify.Create)) && timerC == nil {
				timerC = time.After(watchDebounceDelay)
			}
		case err, ok := <-w.watcher.Errors:
			if !ok {
				return

Various components described in Config Ingestion can trigger a Config Update. These are batched up ("debounced"), to avoid excessive activity when many changes happen in succession, and eventually enqueued in the Push Queue.

	// ListenerBuilder, if specified, allows making the server use the given
	// listener instead of a buffered conn.
	ListenerBuilder func() (net.Listener, error)

	// Time to debounce
	// By default, set to 0s to speed up tests
	DebounceTime time.Duration

	// EnableFakeXDSUpdater will use a XDSUpdater that can be used to watch events
	EnableFakeXDSUpdater       bool