case tar.TypeDir:
			if _, err := os.Stat(dest); err != nil {
				if err := os.Mkdir(dest, 0o755); err != nil {
					return fmt.Errorf("mkdir: %v", err)
				}
			}
		case tar.TypeReg:
			// Create containing folder if not present
			dir := path.Dir(dest)
			if _, err := os.Stat(dir); err != nil {
				if err := os.MkdirAll(dir, 0o755); err != nil {
					return err
				}
			}
			outFile, err := os.Create(dest)

automate configuration migration from Helm to the operator.

The operator code uses the new Helm charts in the [istio/manifests/charts](../manifests/charts/istio-operator). It is not
compatible with the older charts in [istio/istio](https://github.com/istio/istio/tree/1.4.7/install/kubernetes/helm).
See `istio/manifests/charts` for details about the new charts and why they were created. Briefly, the new charts