f, err := newFile(path)
	if err != nil {
		return fmt.Errorf("unable to create new file at %v: %w", path, err)
	}

	w.f = f

	return nil
}

// NewDir creates a new concurrency safe Writer which performs log rotation.
func NewDir(opts Options) (io.WriteCloser, error) {
	if err := os.MkdirAll(opts.Directory, os.ModePerm); err != nil {

	if port <= 0 {
		return
	}
	mux := http.NewServeMux()
	var listener net.Listener
	var err error
	if listener, err = net.Listen("tcp", fmt.Sprintf(":%d", port)); err != nil {
		log.Errorf("unable to listen on socket: %v", err)
		return
	}
	exporter, err := monitoring.RegisterPrometheusExporter(nil, nil)
	if err != nil {
		log.Errorf("could not set up prometheus exporter: %v", err)
		return
	}
	mux.Handle(path, exporter)

		if err != nil {
			return cfg, fmt.Errorf("%s: Invalid MINIO_COMPRESSION_EXTENSIONS value (`%s`)", err, extensions)
		}
		cfg.Extensions = extensions
	}

	if compressExtensionsLegacy != "" {
		extensions, err := parseCompressIncludes(compressExtensions)
		if err != nil {
			return cfg, fmt.Errorf("%s: Invalid MINIO_COMPRESS_EXTENSIONS value (`%s`)", err, extensions)
		}

	}
	for i, tc := range cases {
		tval, err := parseSQLTimestamp(tc.s)
		if err != nil {
			t.Errorf("Case %d: Unexpected error: %v", i+1, err)
			continue
		}
		if !tval.Equal(tc.t) {
			t.Errorf("Case %d: Expected %v got %v", i+1, tc.t, tval)
			continue
		}

		tstr := FormatSQLTimestamp(tc.t)
		if tstr != tc.s {
			t.Errorf("Case %d: Expected %s got %s", i+1, tc.s, tstr)
			continue
		}
	}

	if j == -1 {
		return nil, fmt.Errorf("webhook URL %s is malformed", u)
	}
	ret.gcpProject = u.Path[i : i+j]

	const crSeg = "/ISTIO_META_CLOUDRUN_ADDR/"
	i += j
	j = strings.Index(u.Path[i:], crSeg)
	if j == -1 {
		return nil, fmt.Errorf("webhook URL %s is missing %s", u, crSeg)
	}
	ret.istiod = u.Path[i+j+len(crSeg):]

	return ret, nil

func (x *xlMetaV2VersionHeader) unmarshalV(v uint8, bts []byte) (o []byte, err error) {
	switch v {
	case 1:
		return x.unmarshalV1(bts)
	case 2:
		x2 := xlMetaV2VersionHeaderV2{xlMetaV2VersionHeader: x}
		return x2.UnmarshalMsg(bts)
	case xlHeaderVersion:
		return x.UnmarshalMsg(bts)
	}
	return bts, fmt.Errorf("unknown xlHeaderVersion: %d", v)
}

// unmarshalV1 decodes version 1, never released.

		t.Fatalf("failed to parse pointer user, got error %v", err)
	}

	if customize.Table != "customize" {
		t.Errorf("Failed to customize table with TableName method")
	}
}

func TestNestedModel(t *testing.T) {
	versionUser, err := schema.Parse(&VersionUser{}, &sync.Map{}, schema.NamingStrategy{})
	if err != nil {
		t.Fatalf("failed to parse nested user, got error %v", err)
	}

	fields := []schema.Field{

		t.Fatalf("Failed to create Comparator: %v", err)
	}
	err = comparator.Diff()
	if err != nil {
		t.Errorf("Unexpected error during diff: %v", err)
	}

	expected := []string{"Clusters Match", "Listeners Match", "Routes Match"}
	for _, exp := range expected {
		if !bytes.Contains(outputBuffer.Bytes(), []byte(exp)) {
			t.Errorf("Expected %s, but it was not found", exp)
		}
	}
}

	xdsResponses map[string]*discovery.DiscoveryResponse,
) (map[string]*discovery.DiscoveryResponse, error) {
	for _, response := range xdsResponses {
		for _, resource := range response.Resources {
			eString := string(resource.Value)
			switch {
			case strings.Contains(eString, "You must provide a proxyID in the query string"):
				return nil, fmt.Errorf(" You must provide a proxyID in the query string, e.g. [%s]",
					"edsz?proxyID=istio-ingressgateway")

	routes, err := c.retrieveSortedRouteSlice()
	if err != nil {
		return nil, nil, err
	}
	w := new(tabwriter.Writer).Init(c.Stdout, 0, 8, 5, ' ', 0)
	return w, routes, nil
}

func (c *ConfigWriter) retrieveSortedRouteSlice() ([]*route.RouteConfiguration, error) {
	if c.configDump == nil {
		return nil, fmt.Errorf("config writer has not been primed")
	}