update vendor

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

vendor/sigs.k8s.io/kustomize/kyaml/yaml/merge3/merge3.go

@@ -0,0 +1,45 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Package merge contains libraries for merging fields from one RNode to another
+// RNode
+package merge3
+
+import (
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+	"sigs.k8s.io/kustomize/kyaml/yaml/walk"
+)
+
+func Merge(dest, original, update *yaml.RNode) (*yaml.RNode, error) {
+	// if update == nil && original != nil => declarative deletion
+
+	return walk.Walker{
+		Visitor:            Visitor{},
+		VisitKeysAsScalars: true,
+		Sources:            []*yaml.RNode{dest, original, update}}.Walk()
+}
+
+func MergeStrings(dest, original, update string, infer bool) (string, error) {
+	srcOriginal, err := yaml.Parse(original)
+	if err != nil {
+		return "", err
+	}
+	srcUpdated, err := yaml.Parse(update)
+	if err != nil {
+		return "", err
+	}
+	d, err := yaml.Parse(dest)
+	if err != nil {
+		return "", err
+	}
+
+	result, err := walk.Walker{
+		InferAssociativeLists: infer,
+		Visitor:               Visitor{},
+		VisitKeysAsScalars:    true,
+		Sources:               []*yaml.RNode{d, srcOriginal, srcUpdated}}.Walk()
+	if err != nil {
+		return "", err
+	}
+	return result.String()
+}