monitoring dashboard dependency vendor

Signed-off-by: junotx <junotx@126.com>

vendor/k8s.io/kubectl/pkg/validation/schema.go

@@ -0,0 +1,103 @@
+/*
+Copyright 2014 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 validation
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+
+	ejson "github.com/exponent-io/jsonpath"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
+)
+
+// Schema is an interface that knows how to validate an API object serialized to a byte array.
+type Schema interface {
+	ValidateBytes(data []byte) error
+}
+
+// NullSchema always validates bytes.
+type NullSchema struct{}
+
+// ValidateBytes never fails for NullSchema.
+func (NullSchema) ValidateBytes(data []byte) error { return nil }
+
+// NoDoubleKeySchema is a schema that disallows double keys.
+type NoDoubleKeySchema struct{}
+
+// ValidateBytes validates bytes.
+func (NoDoubleKeySchema) ValidateBytes(data []byte) error {
+	var list []error
+	if err := validateNoDuplicateKeys(data, "metadata", "labels"); err != nil {
+		list = append(list, err)
+	}
+	if err := validateNoDuplicateKeys(data, "metadata", "annotations"); err != nil {
+		list = append(list, err)
+	}
+	return utilerrors.NewAggregate(list)
+}
+
+func validateNoDuplicateKeys(data []byte, path ...string) error {
+	r := ejson.NewDecoder(bytes.NewReader(data))
+	// This is Go being unfriendly. The 'path ...string' comes in as a
+	// []string, and SeekTo takes ...interface{}, so we can't just pass
+	// the path straight in, we have to copy it.  *sigh*
+	ifacePath := []interface{}{}
+	for ix := range path {
+		ifacePath = append(ifacePath, path[ix])
+	}
+	found, err := r.SeekTo(ifacePath...)
+	if err != nil {
+		return err
+	}
+	if !found {
+		return nil
+	}
+	seen := map[string]bool{}
+	for {
+		tok, err := r.Token()
+		if err != nil {
+			return err
+		}
+		switch t := tok.(type) {
+		case json.Delim:
+			if t.String() == "}" {
+				return nil
+			}
+		case ejson.KeyString:
+			if seen[string(t)] {
+				return fmt.Errorf("duplicate key: %s", string(t))
+			}
+			seen[string(t)] = true
+		}
+	}
+}
+
+// ConjunctiveSchema encapsulates a schema list.
+type ConjunctiveSchema []Schema
+
+// ValidateBytes validates bytes per a ConjunctiveSchema.
+func (c ConjunctiveSchema) ValidateBytes(data []byte) error {
+	var list []error
+	schemas := []Schema(c)
+	for ix := range schemas {
+		if err := schemas[ix].ValidateBytes(data); err != nil {
+			list = append(list, err)
+		}
+	}
+	return utilerrors.NewAggregate(list)
+}