type CommandParseError struct {
	Err error
}

func (c CommandParseError) Error() string {
	return c.Err.Error()
}

// Confirm waits for a user to confirm with the supplied message.
func Confirm(msg string, writer io.Writer) bool {
	for {
		_, _ = fmt.Fprintf(writer, "%s ", msg)
		var response string
		_, err := fmt.Scanln(&response)
		if err != nil {
			return false
		}

	"istio.io/istio/istioctl/pkg/util"
	"istio.io/istio/istioctl/pkg/util/formatting"
	"istio.io/istio/pkg/config/analysis"
	"istio.io/istio/pkg/config/analysis/analyzers/webhook"
	"istio.io/istio/pkg/config/analysis/diag"
	"istio.io/istio/pkg/config/analysis/local"
	"istio.io/istio/pkg/config/resource"
	"istio.io/istio/pkg/kube"
	"istio.io/istio/pkg/maps"
	"istio.io/istio/pkg/slices"
)

const (

	return ev == "true" || ev == "1"
}

func kubeBuilderInstalled() bool {
	ev := os.Getenv("KUBEBUILDER")
	return ev == "true" || ev == "1"
}

// Confirm waits for a user to confirm with the supplied message.
func Confirm(msg string, writer io.Writer) bool {
	for {
		_, _ = fmt.Fprintf(writer, "%s ", msg)
		var response string
		_, err := fmt.Scanln(&response)
		if err != nil {
			return false
		}

	if orArgs.revision != "" {
		message = "Istio operator revision " + orArgs.revision + " will be removed from cluster, Proceed? (y/N)"
	}
	if !orArgs.skipConfirmation && !args.DryRun && !Confirm(message, cmd.OutOrStdout()) {
		cmd.Print("Cancelled.\n")
		os.Exit(1)
	}

	l.LogAndPrintf("Removing Istio operator...")

	addr := fmt.Sprintf("@testaddr%d", ztunnelTestCounter.Add(1))
	ztun, err := newZtunnelServer(addr, pods)
	if err != nil {
		panic(err)
	}
	go ztun.Run(ctx)

	// now as a client connect confirm we and get snapshot
	resolvedAddr, err := net.ResolveUnixAddr("unixpacket", addr)
	if err != nil {
		panic(err)
	}
	ztunClient, err := net.DialUnix("unixpacket", nil, resolvedAddr)
	if err != nil {
		panic(err)

	}

	// Warn users if they use `istioctl install` without any config args.
	if !rootArgs.DryRun && !iArgs.SkipConfirmation {
		prompt := fmt.Sprintf("This will install the Istio %s %q profile (with components: %s) into the cluster. Proceed? (y/N)",
			tag, profile, humanReadableJoin(enabledComponents))
		if !Confirm(prompt, stdOut) {
			p.Println("Cancelled.")
			os.Exit(1)
		}
	}

	for _, resp := range istiodResponses {
		if len(resp.Resources) > 0 {
			c.istiod = &configdump.Wrapper{
				ConfigDump: &admin.ConfigDump{
					Configs: resp.Resources,
				},
			}
			break
		}
	}
	if c.istiod == nil {
		return nil, fmt.Errorf("unable to find config dump in Istiod responses")
	}
	envoyDump := &configdump.Wrapper{}
	err := json.Unmarshal(envoyResponse, envoyDump)
	if err != nil {
		return nil, err

type Format int

const (
	JSON Format = iota
	TABULAR
)

// includeConfigType is a flag to indicate whether to include the config type in the output
var includeConfigType bool

func SetPrintConfigTypeInSummary(p bool) {
	includeConfigType = p
}

// NewSDSWriter generates a new instance which conforms to SDSWriter interface
func NewSDSWriter(w io.Writer, format Format) SDSWriter {
	return &sdsWriter{
		w:      w,

	"fmt"
	"io"
	"text/tabwriter"

	"sigs.k8s.io/yaml"
)

// ConfigWriter is a writer for processing responses from the Ztunnel Admin config_dump endpoint
type ConfigWriter struct {
	Stdout      io.Writer
	ztunnelDump *ZtunnelDump
	FullDump    []byte
}

// Prime loads the config dump into the writer ready for printing
func (c *ConfigWriter) Prime(b []byte) error {
	cd := ZtunnelDump{}

	admin "github.com/envoyproxy/go-control-plane/envoy/admin/v3"
	core "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
	"sigs.k8s.io/yaml"

	"istio.io/istio/istioctl/pkg/util/clusters"
	"istio.io/istio/istioctl/pkg/util/proto"
)

// EndpointFilter is used to pass filter information into route based config writer print functions
type EndpointFilter struct {
	Address string
	Port    uint32
	Cluster string