update vendor

Signed-off-by: Roland.Ma <rolandma@yunify.com>

vendor/k8s.io/component-base/cli/flag/string_slice_flag.go

@@ -0,0 +1,59 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flag
+
+import (
+	goflag "flag"
+	"strings"
+
+	"github.com/spf13/pflag"
+)
+
+// StringSlice implements goflag.Value and plfag.Value,
+// and allows set to be invoked repeatedly to accumulate values.
+type StringSlice struct {
+	value   *[]string
+	changed bool
+}
+
+func NewStringSlice(s *[]string) *StringSlice {
+	return &StringSlice{value: s}
+}
+
+var _ goflag.Value = &StringSlice{}
+var _ pflag.Value = &StringSlice{}
+
+func (s *StringSlice) String() string {
+	if s == nil || s.value == nil {
+		return ""
+	}
+	return strings.Join(*s.value, " ")
+}
+
+func (s *StringSlice) Set(val string) error {
+	if s.value == nil || !s.changed {
+		v := make([]string, 0)
+		s.value = &v
+	}
+	*s.value = append(*s.value, val)
+	s.changed = true
+	return nil
+}
+
+func (StringSlice) Type() string {
+	return "sliceString"
+}