// See e.g. https://man.openbsd.org/sysexits.3
// or `less /usr/includes/sysexits.h` if you're on Linux
//
// Picking the right range is tricky--there are a lot of reserved ones (see
// https://www.tldp.org/LDP/abs/html/exitcodes.html#EXITCODESREF) and then some
// used by convention (see sysexits).
//
// The intention here is to use 64-78 in a way that matches the attempt in

		UserManaged:          true,
	}
	tagWhYAML, err := Generate(ctx, kubeClient, opts, istioNS)
	if err != nil {
		return err
	}
	// Check the newly generated webhook does not conflict with existing ones.
	resName := webhookName
	if resName == "" {
		resName = fmt.Sprintf("%s-%s", "istio-revision-tag", tagName)
	}
	if err := analyzeWebhook(resName, istioNS, tagWhYAML, revision, kubeClient.RESTConfig()); err != nil {

type manifestDiffArgs struct {
	// compareDir indicates comparison between directory.
	compareDir bool
	// verbose generates verbose output.
	verbose bool
	// selectResources constrains the list of resources to compare to only the ones in this list, ignoring all others.
	// The format of each list item is :: and the items are comma separated. The * character represents wildcard selection.
	// e.g.

	if host[0] == '*' {
		return host
	}
	if strings.HasSuffix(host, k8sSuffix) {
		return host
	}
	return host + k8sSuffix
}

// getDestRuleSubsets gets names of subsets that match any pod labels (also, ones that don't match).
func getDestRuleSubsets(subsets []*v1alpha3.Subset, podsLabels []klabels.Set) ([]string, []string) {
	matchingSubsets := make([]string, 0, len(subsets))
	nonmatchingSubsets := make([]string, 0, len(subsets))