Show spinner on restart (#64)

* Show spinner on restart

* Updated CHANGELOG.md

CHANGELOG.md

@@ -24,6 +24,9 @@ This project tries to follow [SemVer 2.0.0](https://semver.org/).
   The fix is just adding a small 150ms sleep, which is hopefully enough time
   for tools like `kubectx` to finish writing the kubeconfig file. (#63)
 
+- Added spinner when the watch restarts (either from `--watch-kubeconfig` or
+  from an error), to indicate that it's loading. (#64)
+
 - Changed to Go 1.21.4 to resolve vulnerability [GO-2023-2186](https://pkg.go.dev/vuln/GO-2023-2186),
   where `filepath.IsLocal` incorrectly treated reserved names as local. (#66)
 

pkg/klock/klock.go

@@ -171,9 +171,17 @@ func (w *Watcher) WatchLoop(ctx context.Context, restartChan <-chan struct{}) er
 		clearBeforePrinting = true
 		select {
 		case err := <-watchErrChan:
+			if cmd := w.Printer.Table.StartSpinner(); cmd != nil {
+				w.Program.Send(cmd())
+			}
 			w.errorChan <- fmt.Errorf("restart in 5s: %w", err)
 			time.Sleep(5 * time.Second)
+			w.Printer.Table.StopSpinner()
+			w.Printer.Table.SetError(nil)
 		case <-restartChan:
+			if cmd := w.Printer.Table.StartSpinner(); cmd != nil {
+				w.Program.Send(cmd())
+			}
 			// Prevent it from restarting too eagerly when we're told to restart
 			// so the filesystem has time to flush, such as in case of
 			// "kubectx" on bigger kubeconfigs.