rebase: update kubernetes to v1.20.0

updated kubernetes packages to latest
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/sigs.k8s.io/structured-merge-diff/v4/LICENSE

@@ -0,0 +1,201 @@
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vendor/sigs.k8s.io/structured-merge-diff/v4/value/allocator.go

@@ -0,0 +1,203 @@
+/*
+Copyright 2020 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 value
+
+// Allocator provides a value object allocation strategy.
+// Value objects can be allocated by passing an allocator to the "Using"
+// receiver functions on the value interfaces, e.g. Map.ZipUsing(allocator, ...).
+// Value objects returned from "Using" functions should be given back to the allocator
+// once longer needed by calling Allocator.Free(Value).
+type Allocator interface {
+	// Free gives the allocator back any value objects returned by the "Using"
+	// receiver functions on the value interfaces.
+	// interface{} may be any of: Value, Map, List or Range.
+	Free(interface{})
+
+	// The unexported functions are for "Using" receiver functions of the value types
+	// to request what they need from the allocator.
+	allocValueUnstructured() *valueUnstructured
+	allocListUnstructuredRange() *listUnstructuredRange
+	allocValueReflect() *valueReflect
+	allocMapReflect() *mapReflect
+	allocStructReflect() *structReflect
+	allocListReflect() *listReflect
+	allocListReflectRange() *listReflectRange
+}
+
+// HeapAllocator simply allocates objects to the heap. It is the default
+// allocator used receiver functions on the value interfaces that do not accept
+// an allocator and should be used whenever allocating objects that will not
+// be given back to an allocator by calling Allocator.Free(Value).
+var HeapAllocator = &heapAllocator{}
+
+type heapAllocator struct{}
+
+func (p *heapAllocator) allocValueUnstructured() *valueUnstructured {
+	return &valueUnstructured{}
+}
+
+func (p *heapAllocator) allocListUnstructuredRange() *listUnstructuredRange {
+	return &listUnstructuredRange{vv: &valueUnstructured{}}
+}
+
+func (p *heapAllocator) allocValueReflect() *valueReflect {
+	return &valueReflect{}
+}
+
+func (p *heapAllocator) allocStructReflect() *structReflect {
+	return &structReflect{}
+}
+
+func (p *heapAllocator) allocMapReflect() *mapReflect {
+	return &mapReflect{}
+}
+
+func (p *heapAllocator) allocListReflect() *listReflect {
+	return &listReflect{}
+}
+
+func (p *heapAllocator) allocListReflectRange() *listReflectRange {
+	return &listReflectRange{vr: &valueReflect{}}
+}
+
+func (p *heapAllocator) Free(_ interface{}) {}
+
+// NewFreelistAllocator creates freelist based allocator.
+// This allocator provides fast allocation and freeing of short lived value objects.
+//
+// The freelists are bounded in size by freelistMaxSize. If more than this amount of value objects is
+// allocated at once, the excess will be returned to the heap for garbage collection when freed.
+//
+// This allocator is unsafe and must not be accessed concurrently by goroutines.
+//
+// This allocator works well for traversal of value data trees. Typical usage is to acquire
+// a freelist at the beginning of the traversal and use it through out
+// for all temporary value access.
+func NewFreelistAllocator() Allocator {
+	return &freelistAllocator{
+		valueUnstructured: &freelist{new: func() interface{} {
+			return &valueUnstructured{}
+		}},
+		listUnstructuredRange: &freelist{new: func() interface{} {
+			return &listUnstructuredRange{vv: &valueUnstructured{}}
+		}},
+		valueReflect: &freelist{new: func() interface{} {
+			return &valueReflect{}
+		}},
+		mapReflect: &freelist{new: func() interface{} {
+			return &mapReflect{}
+		}},
+		structReflect: &freelist{new: func() interface{} {
+			return &structReflect{}
+		}},
+		listReflect: &freelist{new: func() interface{} {
+			return &listReflect{}
+		}},
+		listReflectRange: &freelist{new: func() interface{} {
+			return &listReflectRange{vr: &valueReflect{}}
+		}},
+	}
+}
+
+// Bound memory usage of freelists. This prevents the processing of very large lists from leaking memory.
+// This limit is large enough for endpoints objects containing 1000 IP address entries. Freed objects
+// that don't fit into the freelist are orphaned on the heap to be garbage collected.
+const freelistMaxSize = 1000
+
+type freelistAllocator struct {
+	valueUnstructured     *freelist
+	listUnstructuredRange *freelist
+	valueReflect          *freelist
+	mapReflect            *freelist
+	structReflect         *freelist
+	listReflect           *freelist
+	listReflectRange      *freelist
+}
+
+type freelist struct {
+	list []interface{}
+	new  func() interface{}
+}
+
+func (f *freelist) allocate() interface{} {
+	var w2 interface{}
+	if n := len(f.list); n > 0 {
+		w2, f.list = f.list[n-1], f.list[:n-1]
+	} else {
+		w2 = f.new()
+	}
+	return w2
+}
+
+func (f *freelist) free(v interface{}) {
+	if len(f.list) < freelistMaxSize {
+		f.list = append(f.list, v)
+	}
+}
+
+func (w *freelistAllocator) Free(value interface{}) {
+	switch v := value.(type) {
+	case *valueUnstructured:
+		v.Value = nil // don't hold references to unstructured objects
+		w.valueUnstructured.free(v)
+	case *listUnstructuredRange:
+		v.vv.Value = nil // don't hold references to unstructured objects
+		w.listUnstructuredRange.free(v)
+	case *valueReflect:
+		v.ParentMapKey = nil
+		v.ParentMap = nil
+		w.valueReflect.free(v)
+	case *mapReflect:
+		w.mapReflect.free(v)
+	case *structReflect:
+		w.structReflect.free(v)
+	case *listReflect:
+		w.listReflect.free(v)
+	case *listReflectRange:
+		v.vr.ParentMapKey = nil
+		v.vr.ParentMap = nil
+		w.listReflectRange.free(v)
+	}
+}
+
+func (w *freelistAllocator) allocValueUnstructured() *valueUnstructured {
+	return w.valueUnstructured.allocate().(*valueUnstructured)
+}
+
+func (w *freelistAllocator) allocListUnstructuredRange() *listUnstructuredRange {
+	return w.listUnstructuredRange.allocate().(*listUnstructuredRange)
+}
+
+func (w *freelistAllocator) allocValueReflect() *valueReflect {
+	return w.valueReflect.allocate().(*valueReflect)
+}
+
+func (w *freelistAllocator) allocStructReflect() *structReflect {
+	return w.structReflect.allocate().(*structReflect)
+}
+
+func (w *freelistAllocator) allocMapReflect() *mapReflect {
+	return w.mapReflect.allocate().(*mapReflect)
+}
+
+func (w *freelistAllocator) allocListReflect() *listReflect {
+	return w.listReflect.allocate().(*listReflect)
+}
+
+func (w *freelistAllocator) allocListReflectRange() *listReflectRange {
+	return w.listReflectRange.allocate().(*listReflectRange)
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/doc.go

@@ -0,0 +1,21 @@
+/*
+Copyright 2018 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 value defines types for an in-memory representation of yaml or json
+// objects, organized for convenient comparison with a schema (as defined by
+// the sibling schema package). Functions for reading and writing the objects
+// are also provided.
+package value

vendor/sigs.k8s.io/structured-merge-diff/v4/value/fields.go

@@ -0,0 +1,97 @@
+/*
+Copyright 2019 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 value
+
+import (
+	"sort"
+	"strings"
+)
+
+// Field is an individual key-value pair.
+type Field struct {
+	Name  string
+	Value Value
+}
+
+// FieldList is a list of key-value pairs. Each field is expected to
+// have a different name.
+type FieldList []Field
+
+// Sort sorts the field list by Name.
+func (f FieldList) Sort() {
+	if len(f) < 2 {
+		return
+	}
+	if len(f) == 2 {
+		if f[1].Name < f[0].Name {
+			f[0], f[1] = f[1], f[0]
+		}
+		return
+	}
+	sort.SliceStable(f, func(i, j int) bool {
+		return f[i].Name < f[j].Name
+	})
+}
+
+// Less compares two lists lexically.
+func (f FieldList) Less(rhs FieldList) bool {
+	return f.Compare(rhs) == -1
+}
+
+// Compare compares two lists lexically. The result will be 0 if f==rhs, -1
+// if f < rhs, and +1 if f > rhs.
+func (f FieldList) Compare(rhs FieldList) int {
+	i := 0
+	for {
+		if i >= len(f) && i >= len(rhs) {
+			// Maps are the same length and all items are equal.
+			return 0
+		}
+		if i >= len(f) {
+			// F is shorter.
+			return -1
+		}
+		if i >= len(rhs) {
+			// RHS is shorter.
+			return 1
+		}
+		if c := strings.Compare(f[i].Name, rhs[i].Name); c != 0 {
+			return c
+		}
+		if c := Compare(f[i].Value, rhs[i].Value); c != 0 {
+			return c
+		}
+		// The items are equal; continue.
+		i++
+	}
+}
+
+// Equals returns true if the two fieldslist are equals, false otherwise.
+func (f FieldList) Equals(rhs FieldList) bool {
+	if len(f) != len(rhs) {
+		return false
+	}
+	for i := range f {
+		if f[i].Name != rhs[i].Name {
+			return false
+		}
+		if !Equals(f[i].Value, rhs[i].Value) {
+			return false
+		}
+	}
+	return true
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/jsontagutil.go

@@ -0,0 +1,91 @@
+/*
+Copyright 2019 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 value
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+// TODO: This implements the same functionality as https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/apimachinery/pkg/runtime/converter.go#L236
+// but is based on the highly efficient approach from https://golang.org/src/encoding/json/encode.go
+
+func lookupJsonTags(f reflect.StructField) (name string, omit bool, inline bool, omitempty bool) {
+	tag := f.Tag.Get("json")
+	if tag == "-" {
+		return "", true, false, false
+	}
+	name, opts := parseTag(tag)
+	if name == "" {
+		name = f.Name
+	}
+	return name, false, opts.Contains("inline"), opts.Contains("omitempty")
+}
+
+func isZero(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
+		return v.Len() == 0
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.Interface, reflect.Ptr:
+		return v.IsNil()
+	case reflect.Chan, reflect.Func:
+		panic(fmt.Sprintf("unsupported type: %v", v.Type()))
+	}
+	return false
+}
+
+type tagOptions string
+
+// parseTag splits a struct field's json tag into its name and
+// comma-separated options.
+func parseTag(tag string) (string, tagOptions) {
+	if idx := strings.Index(tag, ","); idx != -1 {
+		return tag[:idx], tagOptions(tag[idx+1:])
+	}
+	return tag, tagOptions("")
+}
+
+// Contains reports whether a comma-separated list of options
+// contains a particular substr flag. substr must be surrounded by a
+// string boundary or commas.
+func (o tagOptions) Contains(optionName string) bool {
+	if len(o) == 0 {
+		return false
+	}
+	s := string(o)
+	for s != "" {
+		var next string
+		i := strings.Index(s, ",")
+		if i >= 0 {
+			s, next = s[:i], s[i+1:]
+		}
+		if s == optionName {
+			return true
+		}
+		s = next
+	}
+	return false
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/list.go

@@ -0,0 +1,139 @@
+/*
+Copyright 2019 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 value
+
+// List represents a list object.
+type List interface {
+	// Length returns how many items can be found in the map.
+	Length() int
+	// At returns the item at the given position in the map. It will
+	// panic if the index is out of range.
+	At(int) Value
+	// AtUsing uses the provided allocator and returns the item at the given
+	// position in the map. It will panic if the index is out of range.
+	// The returned Value should be given back to the Allocator when no longer needed
+	// by calling Allocator.Free(Value).
+	AtUsing(Allocator, int) Value
+	// Range returns a ListRange for iterating over the items in the list.
+	Range() ListRange
+	// RangeUsing uses the provided allocator and returns a ListRange for
+	// iterating over the items in the list.
+	// The returned Range should be given back to the Allocator when no longer needed
+	// by calling Allocator.Free(Value).
+	RangeUsing(Allocator) ListRange
+	// Equals compares the two lists, and return true if they are the same, false otherwise.
+	// Implementations can use ListEquals as a general implementation for this methods.
+	Equals(List) bool
+	// EqualsUsing uses the provided allocator and compares the two lists, and return true if
+	// they are the same, false otherwise. Implementations can use ListEqualsUsing as a general
+	// implementation for this methods.
+	EqualsUsing(Allocator, List) bool
+}
+
+// ListRange represents a single iteration across the items of a list.
+type ListRange interface {
+	// Next increments to the next item in the range, if there is one, and returns true, or returns false if there are no more items.
+	Next() bool
+	// Item returns the index and value of the current item in the range. or panics if there is no current item.
+	// For efficiency, Item may reuse the values returned by previous Item calls. Callers should be careful avoid holding
+	// pointers to the value returned by Item() that escape the iteration loop since they become invalid once either
+	// Item() or Allocator.Free() is called.
+	Item() (index int, value Value)
+}
+
+var EmptyRange = &emptyRange{}
+
+type emptyRange struct{}
+
+func (_ *emptyRange) Next() bool {
+	return false
+}
+
+func (_ *emptyRange) Item() (index int, value Value) {
+	panic("Item called on empty ListRange")
+}
+
+// ListEquals compares two lists lexically.
+// WARN: This is a naive implementation, calling lhs.Equals(rhs) is typically the most efficient.
+func ListEquals(lhs, rhs List) bool {
+	return ListEqualsUsing(HeapAllocator, lhs, rhs)
+}
+
+// ListEqualsUsing uses the provided allocator and compares two lists lexically.
+// WARN: This is a naive implementation, calling lhs.EqualsUsing(allocator, rhs) is typically the most efficient.
+func ListEqualsUsing(a Allocator, lhs, rhs List) bool {
+	if lhs.Length() != rhs.Length() {
+		return false
+	}
+
+	lhsRange := lhs.RangeUsing(a)
+	defer a.Free(lhsRange)
+	rhsRange := rhs.RangeUsing(a)
+	defer a.Free(rhsRange)
+
+	for lhsRange.Next() && rhsRange.Next() {
+		_, lv := lhsRange.Item()
+		_, rv := rhsRange.Item()
+		if !EqualsUsing(a, lv, rv) {
+			return false
+		}
+	}
+	return true
+}
+
+// ListLess compares two lists lexically.
+func ListLess(lhs, rhs List) bool {
+	return ListCompare(lhs, rhs) == -1
+}
+
+// ListCompare compares two lists lexically. The result will be 0 if l==rhs, -1
+// if l < rhs, and +1 if l > rhs.
+func ListCompare(lhs, rhs List) int {
+	return ListCompareUsing(HeapAllocator, lhs, rhs)
+}
+
+// ListCompareUsing uses the provided allocator and compares two lists lexically. The result will be 0 if l==rhs, -1
+// if l < rhs, and +1 if l > rhs.
+func ListCompareUsing(a Allocator, lhs, rhs List) int {
+	lhsRange := lhs.RangeUsing(a)
+	defer a.Free(lhsRange)
+	rhsRange := rhs.RangeUsing(a)
+	defer a.Free(rhsRange)
+
+	for {
+		lhsOk := lhsRange.Next()
+		rhsOk := rhsRange.Next()
+		if !lhsOk && !rhsOk {
+			// Lists are the same length and all items are equal.
+			return 0
+		}
+		if !lhsOk {
+			// LHS is shorter.
+			return -1
+		}
+		if !rhsOk {
+			// RHS is shorter.
+			return 1
+		}
+		_, lv := lhsRange.Item()
+		_, rv := rhsRange.Item()
+		if c := CompareUsing(a, lv, rv); c != 0 {
+			return c
+		}
+		// The items are equal; continue.
+	}
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/listreflect.go

@@ -0,0 +1,98 @@
+/*
+Copyright 2019 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 value
+
+import (
+	"reflect"
+)
+
+type listReflect struct {
+	Value reflect.Value
+}
+
+func (r listReflect) Length() int {
+	val := r.Value
+	return val.Len()
+}
+
+func (r listReflect) At(i int) Value {
+	val := r.Value
+	return mustWrapValueReflect(val.Index(i), nil, nil)
+}
+
+func (r listReflect) AtUsing(a Allocator, i int) Value {
+	val := r.Value
+	return a.allocValueReflect().mustReuse(val.Index(i), nil, nil, nil)
+}
+
+func (r listReflect) Unstructured() interface{} {
+	l := r.Length()
+	result := make([]interface{}, l)
+	for i := 0; i < l; i++ {
+		result[i] = r.At(i).Unstructured()
+	}
+	return result
+}
+
+func (r listReflect) Range() ListRange {
+	return r.RangeUsing(HeapAllocator)
+}
+
+func (r listReflect) RangeUsing(a Allocator) ListRange {
+	length := r.Value.Len()
+	if length == 0 {
+		return EmptyRange
+	}
+	rr := a.allocListReflectRange()
+	rr.list = r.Value
+	rr.i = -1
+	rr.entry = TypeReflectEntryOf(r.Value.Type().Elem())
+	return rr
+}
+
+func (r listReflect) Equals(other List) bool {
+	return r.EqualsUsing(HeapAllocator, other)
+}
+func (r listReflect) EqualsUsing(a Allocator, other List) bool {
+	if otherReflectList, ok := other.(*listReflect); ok {
+		return reflect.DeepEqual(r.Value.Interface(), otherReflectList.Value.Interface())
+	}
+	return ListEqualsUsing(a, &r, other)
+}
+
+type listReflectRange struct {
+	list  reflect.Value
+	vr    *valueReflect
+	i     int
+	entry *TypeReflectCacheEntry
+}
+
+func (r *listReflectRange) Next() bool {
+	r.i += 1
+	return r.i < r.list.Len()
+}
+
+func (r *listReflectRange) Item() (index int, value Value) {
+	if r.i < 0 {
+		panic("Item() called before first calling Next()")
+	}
+	if r.i >= r.list.Len() {
+		panic("Item() called on ListRange with no more items")
+	}
+	v := r.list.Index(r.i)
+	return r.i, r.vr.mustReuse(v, r.entry, nil, nil)
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/listunstructured.go

@@ -0,0 +1,74 @@
+/*
+Copyright 2019 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 value
+
+type listUnstructured []interface{}
+
+func (l listUnstructured) Length() int {
+	return len(l)
+}
+
+func (l listUnstructured) At(i int) Value {
+	return NewValueInterface(l[i])
+}
+
+func (l listUnstructured) AtUsing(a Allocator, i int) Value {
+	return a.allocValueUnstructured().reuse(l[i])
+}
+
+func (l listUnstructured) Equals(other List) bool {
+	return l.EqualsUsing(HeapAllocator, other)
+}
+
+func (l listUnstructured) EqualsUsing(a Allocator, other List) bool {
+	return ListEqualsUsing(a, &l, other)
+}
+
+func (l listUnstructured) Range() ListRange {
+	return l.RangeUsing(HeapAllocator)
+}
+
+func (l listUnstructured) RangeUsing(a Allocator) ListRange {
+	if len(l) == 0 {
+		return EmptyRange
+	}
+	r := a.allocListUnstructuredRange()
+	r.list = l
+	r.i = -1
+	return r
+}
+
+type listUnstructuredRange struct {
+	list listUnstructured
+	vv   *valueUnstructured
+	i    int
+}
+
+func (r *listUnstructuredRange) Next() bool {
+	r.i += 1
+	return r.i < len(r.list)
+}
+
+func (r *listUnstructuredRange) Item() (index int, value Value) {
+	if r.i < 0 {
+		panic("Item() called before first calling Next()")
+	}
+	if r.i >= len(r.list) {
+		panic("Item() called on ListRange with no more items")
+	}
+	return r.i, r.vv.reuse(r.list[r.i])
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/map.go

@@ -0,0 +1,270 @@
+/*
+Copyright 2019 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 value
+
+import (
+	"sort"
+)
+
+// Map represents a Map or go structure.
+type Map interface {
+	// Set changes or set the value of the given key.
+	Set(key string, val Value)
+	// Get returns the value for the given key, if present, or (nil, false) otherwise.
+	Get(key string) (Value, bool)
+	// GetUsing uses the provided allocator and returns the value for the given key,
+	// if present, or (nil, false) otherwise.
+	// The returned Value should be given back to the Allocator when no longer needed
+	// by calling Allocator.Free(Value).
+	GetUsing(a Allocator, key string) (Value, bool)
+	// Has returns true if the key is present, or false otherwise.
+	Has(key string) bool
+	// Delete removes the key from the map.
+	Delete(key string)
+	// Equals compares the two maps, and return true if they are the same, false otherwise.
+	// Implementations can use MapEquals as a general implementation for this methods.
+	Equals(other Map) bool
+	// EqualsUsing uses the provided allocator and compares the two maps, and return true if
+	// they are the same, false otherwise. Implementations can use MapEqualsUsing as a general
+	// implementation for this methods.
+	EqualsUsing(a Allocator, other Map) bool
+	// Iterate runs the given function for each key/value in the
+	// map. Returning false in the closure prematurely stops the
+	// iteration.
+	Iterate(func(key string, value Value) bool) bool
+	// IterateUsing uses the provided allocator and runs the given function for each key/value
+	// in the map. Returning false in the closure prematurely stops the iteration.
+	IterateUsing(Allocator, func(key string, value Value) bool) bool
+	// Length returns the number of items in the map.
+	Length() int
+	// Empty returns true if the map is empty.
+	Empty() bool
+	// Zip iterates over the entries of two maps together. If both maps contain a value for a given key, fn is called
+	// with the values from both maps, otherwise it is called with the value of the map that contains the key and nil
+	// for the map that does not contain the key. Returning false in the closure prematurely stops the iteration.
+	Zip(other Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool
+	// ZipUsing uses the provided allocator and iterates over the entries of two maps together. If both maps
+	// contain a value for a given key, fn is called with the values from both maps, otherwise it is called with
+	// the value of the map that contains the key and nil for the map that does not contain the key. Returning
+	// false in the closure prematurely stops the iteration.
+	ZipUsing(a Allocator, other Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool
+}
+
+// MapTraverseOrder defines the map traversal ordering available.
+type MapTraverseOrder int
+
+const (
+	// Unordered indicates that the map traversal has no ordering requirement.
+	Unordered = iota
+	// LexicalKeyOrder indicates that the map traversal is ordered by key, lexically.
+	LexicalKeyOrder
+)
+
+// MapZip iterates over the entries of two maps together. If both maps contain a value for a given key, fn is called
+// with the values from both maps, otherwise it is called with the value of the map that contains the key and nil
+// for the other map. Returning false in the closure prematurely stops the iteration.
+func MapZip(lhs, rhs Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	return MapZipUsing(HeapAllocator, lhs, rhs, order, fn)
+}
+
+// MapZipUsing uses the provided allocator and iterates over the entries of two maps together. If both maps
+// contain a value for a given key, fn is called with the values from both maps, otherwise it is called with
+// the value of the map that contains the key and nil for the other map. Returning false in the closure
+// prematurely stops the iteration.
+func MapZipUsing(a Allocator, lhs, rhs Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	if lhs != nil {
+		return lhs.ZipUsing(a, rhs, order, fn)
+	}
+	if rhs != nil {
+		return rhs.ZipUsing(a, lhs, order, func(key string, rhs, lhs Value) bool { // arg positions of lhs and rhs deliberately swapped
+			return fn(key, lhs, rhs)
+		})
+	}
+	return true
+}
+
+// defaultMapZip provides a default implementation of Zip for implementations that do not need to provide
+// their own optimized implementation.
+func defaultMapZip(a Allocator, lhs, rhs Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	switch order {
+	case Unordered:
+		return unorderedMapZip(a, lhs, rhs, fn)
+	case LexicalKeyOrder:
+		return lexicalKeyOrderedMapZip(a, lhs, rhs, fn)
+	default:
+		panic("Unsupported map order")
+	}
+}
+
+func unorderedMapZip(a Allocator, lhs, rhs Map, fn func(key string, lhs, rhs Value) bool) bool {
+	if (lhs == nil || lhs.Empty()) && (rhs == nil || rhs.Empty()) {
+		return true
+	}
+
+	if lhs != nil {
+		ok := lhs.IterateUsing(a, func(key string, lhsValue Value) bool {
+			var rhsValue Value
+			if rhs != nil {
+				if item, ok := rhs.GetUsing(a, key); ok {
+					rhsValue = item
+					defer a.Free(rhsValue)
+				}
+			}
+			return fn(key, lhsValue, rhsValue)
+		})
+		if !ok {
+			return false
+		}
+	}
+	if rhs != nil {
+		return rhs.IterateUsing(a, func(key string, rhsValue Value) bool {
+			if lhs == nil || !lhs.Has(key) {
+				return fn(key, nil, rhsValue)
+			}
+			return true
+		})
+	}
+	return true
+}
+
+func lexicalKeyOrderedMapZip(a Allocator, lhs, rhs Map, fn func(key string, lhs, rhs Value) bool) bool {
+	var lhsLength, rhsLength int
+	var orderedLength int // rough estimate of length of union of map keys
+	if lhs != nil {
+		lhsLength = lhs.Length()
+		orderedLength = lhsLength
+	}
+	if rhs != nil {
+		rhsLength = rhs.Length()
+		if rhsLength > orderedLength {
+			orderedLength = rhsLength
+		}
+	}
+	if lhsLength == 0 && rhsLength == 0 {
+		return true
+	}
+
+	ordered := make([]string, 0, orderedLength)
+	if lhs != nil {
+		lhs.IterateUsing(a, func(key string, _ Value) bool {
+			ordered = append(ordered, key)
+			return true
+		})
+	}
+	if rhs != nil {
+		rhs.IterateUsing(a, func(key string, _ Value) bool {
+			if lhs == nil || !lhs.Has(key) {
+				ordered = append(ordered, key)
+			}
+			return true
+		})
+	}
+	sort.Strings(ordered)
+	for _, key := range ordered {
+		var litem, ritem Value
+		if lhs != nil {
+			litem, _ = lhs.GetUsing(a, key)
+		}
+		if rhs != nil {
+			ritem, _ = rhs.GetUsing(a, key)
+		}
+		ok := fn(key, litem, ritem)
+		if litem != nil {
+			a.Free(litem)
+		}
+		if ritem != nil {
+			a.Free(ritem)
+		}
+		if !ok {
+			return false
+		}
+	}
+	return true
+}
+
+// MapLess compares two maps lexically.
+func MapLess(lhs, rhs Map) bool {
+	return MapCompare(lhs, rhs) == -1
+}
+
+// MapCompare compares two maps lexically.
+func MapCompare(lhs, rhs Map) int {
+	return MapCompareUsing(HeapAllocator, lhs, rhs)
+}
+
+// MapCompareUsing uses the provided allocator and compares two maps lexically.
+func MapCompareUsing(a Allocator, lhs, rhs Map) int {
+	c := 0
+	var llength, rlength int
+	if lhs != nil {
+		llength = lhs.Length()
+	}
+	if rhs != nil {
+		rlength = rhs.Length()
+	}
+	if llength == 0 && rlength == 0 {
+		return 0
+	}
+	i := 0
+	MapZipUsing(a, lhs, rhs, LexicalKeyOrder, func(key string, lhs, rhs Value) bool {
+		switch {
+		case i == llength:
+			c = -1
+		case i == rlength:
+			c = 1
+		case lhs == nil:
+			c = 1
+		case rhs == nil:
+			c = -1
+		default:
+			c = CompareUsing(a, lhs, rhs)
+		}
+		i++
+		return c == 0
+	})
+	return c
+}
+
+// MapEquals returns true if lhs == rhs, false otherwise. This function
+// acts on generic types and should not be used by callers, but can help
+// implement Map.Equals.
+// WARN: This is a naive implementation, calling lhs.Equals(rhs) is typically the most efficient.
+func MapEquals(lhs, rhs Map) bool {
+	return MapEqualsUsing(HeapAllocator, lhs, rhs)
+}
+
+// MapEqualsUsing uses the provided allocator and returns true if lhs == rhs,
+// false otherwise. This function acts on generic types and should not be used
+// by callers, but can help implement Map.Equals.
+// WARN: This is a naive implementation, calling lhs.EqualsUsing(allocator, rhs) is typically the most efficient.
+func MapEqualsUsing(a Allocator, lhs, rhs Map) bool {
+	if lhs == nil && rhs == nil {
+		return true
+	}
+	if lhs == nil || rhs == nil {
+		return false
+	}
+	if lhs.Length() != rhs.Length() {
+		return false
+	}
+	return MapZipUsing(a, lhs, rhs, Unordered, func(key string, lhs, rhs Value) bool {
+		if lhs == nil || rhs == nil {
+			return false
+		}
+		return EqualsUsing(a, lhs, rhs)
+	})
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/mapreflect.go

@@ -0,0 +1,209 @@
+/*
+Copyright 2019 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 value
+
+import (
+	"reflect"
+)
+
+type mapReflect struct {
+	valueReflect
+}
+
+func (r mapReflect) Length() int {
+	val := r.Value
+	return val.Len()
+}
+
+func (r mapReflect) Empty() bool {
+	val := r.Value
+	return val.Len() == 0
+}
+
+func (r mapReflect) Get(key string) (Value, bool) {
+	return r.GetUsing(HeapAllocator, key)
+}
+
+func (r mapReflect) GetUsing(a Allocator, key string) (Value, bool) {
+	k, v, ok := r.get(key)
+	if !ok {
+		return nil, false
+	}
+	return a.allocValueReflect().mustReuse(v, nil, &r.Value, &k), true
+}
+
+func (r mapReflect) get(k string) (key, value reflect.Value, ok bool) {
+	mapKey := r.toMapKey(k)
+	val := r.Value.MapIndex(mapKey)
+	return mapKey, val, val.IsValid() && val != reflect.Value{}
+}
+
+func (r mapReflect) Has(key string) bool {
+	var val reflect.Value
+	val = r.Value.MapIndex(r.toMapKey(key))
+	if !val.IsValid() {
+		return false
+	}
+	return val != reflect.Value{}
+}
+
+func (r mapReflect) Set(key string, val Value) {
+	r.Value.SetMapIndex(r.toMapKey(key), reflect.ValueOf(val.Unstructured()))
+}
+
+func (r mapReflect) Delete(key string) {
+	val := r.Value
+	val.SetMapIndex(r.toMapKey(key), reflect.Value{})
+}
+
+// TODO: Do we need to support types that implement json.Marshaler and are used as string keys?
+func (r mapReflect) toMapKey(key string) reflect.Value {
+	val := r.Value
+	return reflect.ValueOf(key).Convert(val.Type().Key())
+}
+
+func (r mapReflect) Iterate(fn func(string, Value) bool) bool {
+	return r.IterateUsing(HeapAllocator, fn)
+}
+
+func (r mapReflect) IterateUsing(a Allocator, fn func(string, Value) bool) bool {
+	if r.Value.Len() == 0 {
+		return true
+	}
+	v := a.allocValueReflect()
+	defer a.Free(v)
+	return eachMapEntry(r.Value, func(e *TypeReflectCacheEntry, key reflect.Value, value reflect.Value) bool {
+		return fn(key.String(), v.mustReuse(value, e, &r.Value, &key))
+	})
+}
+
+func eachMapEntry(val reflect.Value, fn func(*TypeReflectCacheEntry, reflect.Value, reflect.Value) bool) bool {
+	iter := val.MapRange()
+	entry := TypeReflectEntryOf(val.Type().Elem())
+	for iter.Next() {
+		next := iter.Value()
+		if !next.IsValid() {
+			continue
+		}
+		if !fn(entry, iter.Key(), next) {
+			return false
+		}
+	}
+	return true
+}
+
+func (r mapReflect) Unstructured() interface{} {
+	result := make(map[string]interface{}, r.Length())
+	r.Iterate(func(s string, value Value) bool {
+		result[s] = value.Unstructured()
+		return true
+	})
+	return result
+}
+
+func (r mapReflect) Equals(m Map) bool {
+	return r.EqualsUsing(HeapAllocator, m)
+}
+
+func (r mapReflect) EqualsUsing(a Allocator, m Map) bool {
+	lhsLength := r.Length()
+	rhsLength := m.Length()
+	if lhsLength != rhsLength {
+		return false
+	}
+	if lhsLength == 0 {
+		return true
+	}
+	vr := a.allocValueReflect()
+	defer a.Free(vr)
+	entry := TypeReflectEntryOf(r.Value.Type().Elem())
+	return m.Iterate(func(key string, value Value) bool {
+		_, lhsVal, ok := r.get(key)
+		if !ok {
+			return false
+		}
+		return Equals(vr.mustReuse(lhsVal, entry, nil, nil), value)
+	})
+}
+
+func (r mapReflect) Zip(other Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	return r.ZipUsing(HeapAllocator, other, order, fn)
+}
+
+func (r mapReflect) ZipUsing(a Allocator, other Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	if otherMapReflect, ok := other.(*mapReflect); ok && order == Unordered {
+		return r.unorderedReflectZip(a, otherMapReflect, fn)
+	}
+	return defaultMapZip(a, &r, other, order, fn)
+}
+
+// unorderedReflectZip provides an optimized unordered zip for mapReflect types.
+func (r mapReflect) unorderedReflectZip(a Allocator, other *mapReflect, fn func(key string, lhs, rhs Value) bool) bool {
+	if r.Empty() && (other == nil || other.Empty()) {
+		return true
+	}
+
+	lhs := r.Value
+	lhsEntry := TypeReflectEntryOf(lhs.Type().Elem())
+
+	// map lookup via reflection is expensive enough that it is better to keep track of visited keys
+	visited := map[string]struct{}{}
+
+	vlhs, vrhs := a.allocValueReflect(), a.allocValueReflect()
+	defer a.Free(vlhs)
+	defer a.Free(vrhs)
+
+	if other != nil {
+		rhs := other.Value
+		rhsEntry := TypeReflectEntryOf(rhs.Type().Elem())
+		iter := rhs.MapRange()
+
+		for iter.Next() {
+			key := iter.Key()
+			keyString := key.String()
+			next := iter.Value()
+			if !next.IsValid() {
+				continue
+			}
+			rhsVal := vrhs.mustReuse(next, rhsEntry, &rhs, &key)
+			visited[keyString] = struct{}{}
+			var lhsVal Value
+			if _, v, ok := r.get(keyString); ok {
+				lhsVal = vlhs.mustReuse(v, lhsEntry, &lhs, &key)
+			}
+			if !fn(keyString, lhsVal, rhsVal) {
+				return false
+			}
+		}
+	}
+
+	iter := lhs.MapRange()
+	for iter.Next() {
+		key := iter.Key()
+		if _, ok := visited[key.String()]; ok {
+			continue
+		}
+		next := iter.Value()
+		if !next.IsValid() {
+			continue
+		}
+		if !fn(key.String(), vlhs.mustReuse(next, lhsEntry, &lhs, &key), nil) {
+			return false
+		}
+	}
+	return true
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/mapunstructured.go

@@ -0,0 +1,190 @@
+/*
+Copyright 2019 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 value
+
+type mapUnstructuredInterface map[interface{}]interface{}
+
+func (m mapUnstructuredInterface) Set(key string, val Value) {
+	m[key] = val.Unstructured()
+}
+
+func (m mapUnstructuredInterface) Get(key string) (Value, bool) {
+	return m.GetUsing(HeapAllocator, key)
+}
+
+func (m mapUnstructuredInterface) GetUsing(a Allocator, key string) (Value, bool) {
+	if v, ok := m[key]; !ok {
+		return nil, false
+	} else {
+		return a.allocValueUnstructured().reuse(v), true
+	}
+}
+
+func (m mapUnstructuredInterface) Has(key string) bool {
+	_, ok := m[key]
+	return ok
+}
+
+func (m mapUnstructuredInterface) Delete(key string) {
+	delete(m, key)
+}
+
+func (m mapUnstructuredInterface) Iterate(fn func(key string, value Value) bool) bool {
+	return m.IterateUsing(HeapAllocator, fn)
+}
+
+func (m mapUnstructuredInterface) IterateUsing(a Allocator, fn func(key string, value Value) bool) bool {
+	if len(m) == 0 {
+		return true
+	}
+	vv := a.allocValueUnstructured()
+	defer a.Free(vv)
+	for k, v := range m {
+		if ks, ok := k.(string); !ok {
+			continue
+		} else {
+			if !fn(ks, vv.reuse(v)) {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+func (m mapUnstructuredInterface) Length() int {
+	return len(m)
+}
+
+func (m mapUnstructuredInterface) Empty() bool {
+	return len(m) == 0
+}
+
+func (m mapUnstructuredInterface) Equals(other Map) bool {
+	return m.EqualsUsing(HeapAllocator, other)
+}
+
+func (m mapUnstructuredInterface) EqualsUsing(a Allocator, other Map) bool {
+	lhsLength := m.Length()
+	rhsLength := other.Length()
+	if lhsLength != rhsLength {
+		return false
+	}
+	if lhsLength == 0 {
+		return true
+	}
+	vv := a.allocValueUnstructured()
+	defer a.Free(vv)
+	return other.Iterate(func(key string, value Value) bool {
+		lhsVal, ok := m[key]
+		if !ok {
+			return false
+		}
+		return Equals(vv.reuse(lhsVal), value)
+	})
+}
+
+func (m mapUnstructuredInterface) Zip(other Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	return m.ZipUsing(HeapAllocator, other, order, fn)
+}
+
+func (m mapUnstructuredInterface) ZipUsing(a Allocator, other Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	return defaultMapZip(a, m, other, order, fn)
+}
+
+type mapUnstructuredString map[string]interface{}
+
+func (m mapUnstructuredString) Set(key string, val Value) {
+	m[key] = val.Unstructured()
+}
+
+func (m mapUnstructuredString) Get(key string) (Value, bool) {
+	return m.GetUsing(HeapAllocator, key)
+}
+func (m mapUnstructuredString) GetUsing(a Allocator, key string) (Value, bool) {
+	if v, ok := m[key]; !ok {
+		return nil, false
+	} else {
+		return a.allocValueUnstructured().reuse(v), true
+	}
+}
+
+func (m mapUnstructuredString) Has(key string) bool {
+	_, ok := m[key]
+	return ok
+}
+
+func (m mapUnstructuredString) Delete(key string) {
+	delete(m, key)
+}
+
+func (m mapUnstructuredString) Iterate(fn func(key string, value Value) bool) bool {
+	return m.IterateUsing(HeapAllocator, fn)
+}
+
+func (m mapUnstructuredString) IterateUsing(a Allocator, fn func(key string, value Value) bool) bool {
+	if len(m) == 0 {
+		return true
+	}
+	vv := a.allocValueUnstructured()
+	defer a.Free(vv)
+	for k, v := range m {
+		if !fn(k, vv.reuse(v)) {
+			return false
+		}
+	}
+	return true
+}
+
+func (m mapUnstructuredString) Length() int {
+	return len(m)
+}
+
+func (m mapUnstructuredString) Equals(other Map) bool {
+	return m.EqualsUsing(HeapAllocator, other)
+}
+
+func (m mapUnstructuredString) EqualsUsing(a Allocator, other Map) bool {
+	lhsLength := m.Length()
+	rhsLength := other.Length()
+	if lhsLength != rhsLength {
+		return false
+	}
+	if lhsLength == 0 {
+		return true
+	}
+	vv := a.allocValueUnstructured()
+	defer a.Free(vv)
+	return other.Iterate(func(key string, value Value) bool {
+		lhsVal, ok := m[key]
+		if !ok {
+			return false
+		}
+		return Equals(vv.reuse(lhsVal), value)
+	})
+}
+
+func (m mapUnstructuredString) Zip(other Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	return m.ZipUsing(HeapAllocator, other, order, fn)
+}
+
+func (m mapUnstructuredString) ZipUsing(a Allocator, other Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	return defaultMapZip(a, m, other, order, fn)
+}
+
+func (m mapUnstructuredString) Empty() bool {
+	return len(m) == 0
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/reflectcache.go

@@ -0,0 +1,463 @@
+/*
+Copyright 2020 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 value
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"sort"
+	"sync"
+	"sync/atomic"
+)
+
+// UnstructuredConverter defines how a type can be converted directly to unstructured.
+// Types that implement json.Marshaler may also optionally implement this interface to provide a more
+// direct and more efficient conversion. All types that choose to implement this interface must still
+// implement this same conversion via json.Marshaler.
+type UnstructuredConverter interface {
+	json.Marshaler // require that json.Marshaler is implemented
+
+	// ToUnstructured returns the unstructured representation.
+	ToUnstructured() interface{}
+}
+
+// TypeReflectCacheEntry keeps data gathered using reflection about how a type is converted to/from unstructured.
+type TypeReflectCacheEntry struct {
+	isJsonMarshaler        bool
+	ptrIsJsonMarshaler     bool
+	isJsonUnmarshaler      bool
+	ptrIsJsonUnmarshaler   bool
+	isStringConvertable    bool
+	ptrIsStringConvertable bool
+
+	structFields        map[string]*FieldCacheEntry
+	orderedStructFields []*FieldCacheEntry
+}
+
+// FieldCacheEntry keeps data gathered using reflection about how the field of a struct is converted to/from
+// unstructured.
+type FieldCacheEntry struct {
+	// JsonName returns the name of the field according to the json tags on the struct field.
+	JsonName string
+	// isOmitEmpty is true if the field has the json 'omitempty' tag.
+	isOmitEmpty bool
+	// fieldPath is a list of field indices (see FieldByIndex) to lookup the value of
+	// a field in a reflect.Value struct. The field indices in the list form a path used
+	// to traverse through intermediary 'inline' fields.
+	fieldPath [][]int
+
+	fieldType reflect.Type
+	TypeEntry *TypeReflectCacheEntry
+}
+
+func (f *FieldCacheEntry) CanOmit(fieldVal reflect.Value) bool {
+	return f.isOmitEmpty && (safeIsNil(fieldVal) || isZero(fieldVal))
+}
+
+// GetUsing returns the field identified by this FieldCacheEntry from the provided struct.
+func (f *FieldCacheEntry) GetFrom(structVal reflect.Value) reflect.Value {
+	// field might be nested within 'inline' structs
+	for _, elem := range f.fieldPath {
+		structVal = structVal.FieldByIndex(elem)
+	}
+	return structVal
+}
+
+var marshalerType = reflect.TypeOf(new(json.Marshaler)).Elem()
+var unmarshalerType = reflect.TypeOf(new(json.Unmarshaler)).Elem()
+var unstructuredConvertableType = reflect.TypeOf(new(UnstructuredConverter)).Elem()
+var defaultReflectCache = newReflectCache()
+
+// TypeReflectEntryOf returns the TypeReflectCacheEntry of the provided reflect.Type.
+func TypeReflectEntryOf(t reflect.Type) *TypeReflectCacheEntry {
+	cm := defaultReflectCache.get()
+	if record, ok := cm[t]; ok {
+		return record
+	}
+	updates := reflectCacheMap{}
+	result := typeReflectEntryOf(cm, t, updates)
+	if len(updates) > 0 {
+		defaultReflectCache.update(updates)
+	}
+	return result
+}
+
+// TypeReflectEntryOf returns all updates needed to add provided reflect.Type, and the types its fields transitively
+// depend on, to the cache.
+func typeReflectEntryOf(cm reflectCacheMap, t reflect.Type, updates reflectCacheMap) *TypeReflectCacheEntry {
+	if record, ok := cm[t]; ok {
+		return record
+	}
+	if record, ok := updates[t]; ok {
+		return record
+	}
+	typeEntry := &TypeReflectCacheEntry{
+		isJsonMarshaler:        t.Implements(marshalerType),
+		ptrIsJsonMarshaler:     reflect.PtrTo(t).Implements(marshalerType),
+		isJsonUnmarshaler:      reflect.PtrTo(t).Implements(unmarshalerType),
+		isStringConvertable:    t.Implements(unstructuredConvertableType),
+		ptrIsStringConvertable: reflect.PtrTo(t).Implements(unstructuredConvertableType),
+	}
+	if t.Kind() == reflect.Struct {
+		fieldEntries := map[string]*FieldCacheEntry{}
+		buildStructCacheEntry(t, fieldEntries, nil)
+		typeEntry.structFields = fieldEntries
+		sortedByJsonName := make([]*FieldCacheEntry, len(fieldEntries))
+		i := 0
+		for _, entry := range fieldEntries {
+			sortedByJsonName[i] = entry
+			i++
+		}
+		sort.Slice(sortedByJsonName, func(i, j int) bool {
+			return sortedByJsonName[i].JsonName < sortedByJsonName[j].JsonName
+		})
+		typeEntry.orderedStructFields = sortedByJsonName
+	}
+
+	// cyclic type references are allowed, so we must add the typeEntry to the updates map before resolving
+	// the field.typeEntry references, or creating them if they are not already in the cache
+	updates[t] = typeEntry
+
+	for _, field := range typeEntry.structFields {
+		if field.TypeEntry == nil {
+			field.TypeEntry = typeReflectEntryOf(cm, field.fieldType, updates)
+		}
+	}
+	return typeEntry
+}
+
+func buildStructCacheEntry(t reflect.Type, infos map[string]*FieldCacheEntry, fieldPath [][]int) {
+	for i := 0; i < t.NumField(); i++ {
+		field := t.Field(i)
+		jsonName, omit, isInline, isOmitempty := lookupJsonTags(field)
+		if omit {
+			continue
+		}
+		if isInline {
+			buildStructCacheEntry(field.Type, infos, append(fieldPath, field.Index))
+			continue
+		}
+		info := &FieldCacheEntry{JsonName: jsonName, isOmitEmpty: isOmitempty, fieldPath: append(fieldPath, field.Index), fieldType: field.Type}
+		infos[jsonName] = info
+	}
+}
+
+// Fields returns a map of JSON field name to FieldCacheEntry for structs, or nil for non-structs.
+func (e TypeReflectCacheEntry) Fields() map[string]*FieldCacheEntry {
+	return e.structFields
+}
+
+// Fields returns a map of JSON field name to FieldCacheEntry for structs, or nil for non-structs.
+func (e TypeReflectCacheEntry) OrderedFields() []*FieldCacheEntry {
+	return e.orderedStructFields
+}
+
+// CanConvertToUnstructured returns true if this TypeReflectCacheEntry can convert values of its type to unstructured.
+func (e TypeReflectCacheEntry) CanConvertToUnstructured() bool {
+	return e.isJsonMarshaler || e.ptrIsJsonMarshaler || e.isStringConvertable || e.ptrIsStringConvertable
+}
+
+// ToUnstructured converts the provided value to unstructured and returns it.
+func (e TypeReflectCacheEntry) ToUnstructured(sv reflect.Value) (interface{}, error) {
+	// This is based on https://github.com/kubernetes/kubernetes/blob/82c9e5c814eb7acc6cc0a090c057294d0667ad66/staging/src/k8s.io/apimachinery/pkg/runtime/converter.go#L505
+	// and is intended to replace it.
+
+	// Check if the object has a custom string converter and use it if available, since it is much more efficient
+	// than round tripping through json.
+	if converter, ok := e.getUnstructuredConverter(sv); ok {
+		return converter.ToUnstructured(), nil
+	}
+	// Check if the object has a custom JSON marshaller/unmarshaller.
+	if marshaler, ok := e.getJsonMarshaler(sv); ok {
+		if sv.Kind() == reflect.Ptr && sv.IsNil() {
+			// We're done - we don't need to store anything.
+			return nil, nil
+		}
+
+		data, err := marshaler.MarshalJSON()
+		if err != nil {
+			return nil, err
+		}
+		switch {
+		case len(data) == 0:
+			return nil, fmt.Errorf("error decoding from json: empty value")
+
+		case bytes.Equal(data, nullBytes):
+			// We're done - we don't need to store anything.
+			return nil, nil
+
+		case bytes.Equal(data, trueBytes):
+			return true, nil
+
+		case bytes.Equal(data, falseBytes):
+			return false, nil
+
+		case data[0] == '"':
+			var result string
+			err := unmarshal(data, &result)
+			if err != nil {
+				return nil, fmt.Errorf("error decoding string from json: %v", err)
+			}
+			return result, nil
+
+		case data[0] == '{':
+			result := make(map[string]interface{})
+			err := unmarshal(data, &result)
+			if err != nil {
+				return nil, fmt.Errorf("error decoding object from json: %v", err)
+			}
+			return result, nil
+
+		case data[0] == '[':
+			result := make([]interface{}, 0)
+			err := unmarshal(data, &result)
+			if err != nil {
+				return nil, fmt.Errorf("error decoding array from json: %v", err)
+			}
+			return result, nil
+
+		default:
+			var (
+				resultInt   int64
+				resultFloat float64
+				err         error
+			)
+			if err = unmarshal(data, &resultInt); err == nil {
+				return resultInt, nil
+			} else if err = unmarshal(data, &resultFloat); err == nil {
+				return resultFloat, nil
+			} else {
+				return nil, fmt.Errorf("error decoding number from json: %v", err)
+			}
+		}
+	}
+
+	return nil, fmt.Errorf("provided type cannot be converted: %v", sv.Type())
+}
+
+// CanConvertFromUnstructured returns true if this TypeReflectCacheEntry can convert objects of the type from unstructured.
+func (e TypeReflectCacheEntry) CanConvertFromUnstructured() bool {
+	return e.isJsonUnmarshaler
+}
+
+// FromUnstructured converts the provided source value from unstructured into the provided destination value.
+func (e TypeReflectCacheEntry) FromUnstructured(sv, dv reflect.Value) error {
+	// TODO: this could be made much more efficient using direct conversions like
+	// UnstructuredConverter.ToUnstructured provides.
+	st := dv.Type()
+	data, err := json.Marshal(sv.Interface())
+	if err != nil {
+		return fmt.Errorf("error encoding %s to json: %v", st.String(), err)
+	}
+	if unmarshaler, ok := e.getJsonUnmarshaler(dv); ok {
+		return unmarshaler.UnmarshalJSON(data)
+	}
+	return fmt.Errorf("unable to unmarshal %v into %v", sv.Type(), dv.Type())
+}
+
+var (
+	nullBytes  = []byte("null")
+	trueBytes  = []byte("true")
+	falseBytes = []byte("false")
+)
+
+func (e TypeReflectCacheEntry) getJsonMarshaler(v reflect.Value) (json.Marshaler, bool) {
+	if e.isJsonMarshaler {
+		return v.Interface().(json.Marshaler), true
+	}
+	if e.ptrIsJsonMarshaler {
+		// Check pointer receivers if v is not a pointer
+		if v.Kind() != reflect.Ptr && v.CanAddr() {
+			v = v.Addr()
+			return v.Interface().(json.Marshaler), true
+		}
+	}
+	return nil, false
+}
+
+func (e TypeReflectCacheEntry) getJsonUnmarshaler(v reflect.Value) (json.Unmarshaler, bool) {
+	if !e.isJsonUnmarshaler {
+		return nil, false
+	}
+	return v.Addr().Interface().(json.Unmarshaler), true
+}
+
+func (e TypeReflectCacheEntry) getUnstructuredConverter(v reflect.Value) (UnstructuredConverter, bool) {
+	if e.isStringConvertable {
+		return v.Interface().(UnstructuredConverter), true
+	}
+	if e.ptrIsStringConvertable {
+		// Check pointer receivers if v is not a pointer
+		if v.CanAddr() {
+			v = v.Addr()
+			return v.Interface().(UnstructuredConverter), true
+		}
+	}
+	return nil, false
+}
+
+type typeReflectCache struct {
+	// use an atomic and copy-on-write since there are a fixed (typically very small) number of structs compiled into any
+	// go program using this cache
+	value atomic.Value
+	// mu is held by writers when performing load/modify/store operations on the cache, readers do not need to hold a
+	// read-lock since the atomic value is always read-only
+	mu sync.Mutex
+}
+
+func newReflectCache() *typeReflectCache {
+	cache := &typeReflectCache{}
+	cache.value.Store(make(reflectCacheMap))
+	return cache
+}
+
+type reflectCacheMap map[reflect.Type]*TypeReflectCacheEntry
+
+// get returns the reflectCacheMap.
+func (c *typeReflectCache) get() reflectCacheMap {
+	return c.value.Load().(reflectCacheMap)
+}
+
+// update merges the provided updates into the cache.
+func (c *typeReflectCache) update(updates reflectCacheMap) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	currentCacheMap := c.value.Load().(reflectCacheMap)
+
+	hasNewEntries := false
+	for t := range updates {
+		if _, ok := currentCacheMap[t]; !ok {
+			hasNewEntries = true
+			break
+		}
+	}
+	if !hasNewEntries {
+		// Bail if the updates have been set while waiting for lock acquisition.
+		// This is safe since setting entries is idempotent.
+		return
+	}
+
+	newCacheMap := make(reflectCacheMap, len(currentCacheMap)+len(updates))
+	for k, v := range currentCacheMap {
+		newCacheMap[k] = v
+	}
+	for t, update := range updates {
+		newCacheMap[t] = update
+	}
+	c.value.Store(newCacheMap)
+}
+
+// Below json Unmarshal is fromk8s.io/apimachinery/pkg/util/json
+// to handle number conversions as expected by Kubernetes
+
+// limit recursive depth to prevent stack overflow errors
+const maxDepth = 10000
+
+// unmarshal unmarshals the given data
+// If v is a *map[string]interface{}, numbers are converted to int64 or float64
+func unmarshal(data []byte, v interface{}) error {
+	switch v := v.(type) {
+	case *map[string]interface{}:
+		// Build a decoder from the given data
+		decoder := json.NewDecoder(bytes.NewBuffer(data))
+		// Preserve numbers, rather than casting to float64 automatically
+		decoder.UseNumber()
+		// Run the decode
+		if err := decoder.Decode(v); err != nil {
+			return err
+		}
+		// If the decode succeeds, post-process the map to convert json.Number objects to int64 or float64
+		return convertMapNumbers(*v, 0)
+
+	case *[]interface{}:
+		// Build a decoder from the given data
+		decoder := json.NewDecoder(bytes.NewBuffer(data))
+		// Preserve numbers, rather than casting to float64 automatically
+		decoder.UseNumber()
+		// Run the decode
+		if err := decoder.Decode(v); err != nil {
+			return err
+		}
+		// If the decode succeeds, post-process the map to convert json.Number objects to int64 or float64
+		return convertSliceNumbers(*v, 0)
+
+	default:
+		return json.Unmarshal(data, v)
+	}
+}
+
+// convertMapNumbers traverses the map, converting any json.Number values to int64 or float64.
+// values which are map[string]interface{} or []interface{} are recursively visited
+func convertMapNumbers(m map[string]interface{}, depth int) error {
+	if depth > maxDepth {
+		return fmt.Errorf("exceeded max depth of %d", maxDepth)
+	}
+
+	var err error
+	for k, v := range m {
+		switch v := v.(type) {
+		case json.Number:
+			m[k], err = convertNumber(v)
+		case map[string]interface{}:
+			err = convertMapNumbers(v, depth+1)
+		case []interface{}:
+			err = convertSliceNumbers(v, depth+1)
+		}
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// convertSliceNumbers traverses the slice, converting any json.Number values to int64 or float64.
+// values which are map[string]interface{} or []interface{} are recursively visited
+func convertSliceNumbers(s []interface{}, depth int) error {
+	if depth > maxDepth {
+		return fmt.Errorf("exceeded max depth of %d", maxDepth)
+	}
+
+	var err error
+	for i, v := range s {
+		switch v := v.(type) {
+		case json.Number:
+			s[i], err = convertNumber(v)
+		case map[string]interface{}:
+			err = convertMapNumbers(v, depth+1)
+		case []interface{}:
+			err = convertSliceNumbers(v, depth+1)
+		}
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// convertNumber converts a json.Number to an int64 or float64, or returns an error
+func convertNumber(n json.Number) (interface{}, error) {
+	// Attempt to convert to an int64 first
+	if i, err := n.Int64(); err == nil {
+		return i, nil
+	}
+	// Return a float64 (default json.Decode() behavior)
+	// An overflow will return an error
+	return n.Float64()
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/scalar.go

@@ -0,0 +1,50 @@
+/*
+Copyright 2019 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 value
+
+// Compare compares floats. The result will be 0 if lhs==rhs, -1 if f <
+// rhs, and +1 if f > rhs.
+func FloatCompare(lhs, rhs float64) int {
+	if lhs > rhs {
+		return 1
+	} else if lhs < rhs {
+		return -1
+	}
+	return 0
+}
+
+// IntCompare compares integers. The result will be 0 if i==rhs, -1 if i <
+// rhs, and +1 if i > rhs.
+func IntCompare(lhs, rhs int64) int {
+	if lhs > rhs {
+		return 1
+	} else if lhs < rhs {
+		return -1
+	}
+	return 0
+}
+
+// Compare compares booleans. The result will be 0 if b==rhs, -1 if b <
+// rhs, and +1 if b > rhs.
+func BoolCompare(lhs, rhs bool) int {
+	if lhs == rhs {
+		return 0
+	} else if lhs == false {
+		return -1
+	}
+	return 1
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/structreflect.go

@@ -0,0 +1,208 @@
+/*
+Copyright 2019 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 value
+
+import (
+	"fmt"
+	"reflect"
+)
+
+type structReflect struct {
+	valueReflect
+}
+
+func (r structReflect) Length() int {
+	i := 0
+	eachStructField(r.Value, func(_ *TypeReflectCacheEntry, s string, value reflect.Value) bool {
+		i++
+		return true
+	})
+	return i
+}
+
+func (r structReflect) Empty() bool {
+	return eachStructField(r.Value, func(_ *TypeReflectCacheEntry, s string, value reflect.Value) bool {
+		return false // exit early if the struct is non-empty
+	})
+}
+
+func (r structReflect) Get(key string) (Value, bool) {
+	return r.GetUsing(HeapAllocator, key)
+}
+
+func (r structReflect) GetUsing(a Allocator, key string) (Value, bool) {
+	if val, ok := r.findJsonNameField(key); ok {
+		return a.allocValueReflect().mustReuse(val, nil, nil, nil), true
+	}
+	return nil, false
+}
+
+func (r structReflect) Has(key string) bool {
+	_, ok := r.findJsonNameField(key)
+	return ok
+}
+
+func (r structReflect) Set(key string, val Value) {
+	fieldEntry, ok := TypeReflectEntryOf(r.Value.Type()).Fields()[key]
+	if !ok {
+		panic(fmt.Sprintf("key %s may not be set on struct %T: field does not exist", key, r.Value.Interface()))
+	}
+	oldVal := fieldEntry.GetFrom(r.Value)
+	newVal := reflect.ValueOf(val.Unstructured())
+	r.update(fieldEntry, key, oldVal, newVal)
+}
+
+func (r structReflect) Delete(key string) {
+	fieldEntry, ok := TypeReflectEntryOf(r.Value.Type()).Fields()[key]
+	if !ok {
+		panic(fmt.Sprintf("key %s may not be deleted on struct %T: field does not exist", key, r.Value.Interface()))
+	}
+	oldVal := fieldEntry.GetFrom(r.Value)
+	if oldVal.Kind() != reflect.Ptr && !fieldEntry.isOmitEmpty {
+		panic(fmt.Sprintf("key %s may not be deleted on struct: %T: value is neither a pointer nor an omitempty field", key, r.Value.Interface()))
+	}
+	r.update(fieldEntry, key, oldVal, reflect.Zero(oldVal.Type()))
+}
+
+func (r structReflect) update(fieldEntry *FieldCacheEntry, key string, oldVal, newVal reflect.Value) {
+	if oldVal.CanSet() {
+		oldVal.Set(newVal)
+		return
+	}
+
+	// map items are not addressable, so if a struct is contained in a map, the only way to modify it is
+	// to write a replacement fieldEntry into the map.
+	if r.ParentMap != nil {
+		if r.ParentMapKey == nil {
+			panic("ParentMapKey must not be nil if ParentMap is not nil")
+		}
+		replacement := reflect.New(r.Value.Type()).Elem()
+		fieldEntry.GetFrom(replacement).Set(newVal)
+		r.ParentMap.SetMapIndex(*r.ParentMapKey, replacement)
+		return
+	}
+
+	// This should never happen since NewValueReflect ensures that the root object reflected on is a pointer and map
+	// item replacement is handled above.
+	panic(fmt.Sprintf("key %s may not be modified on struct: %T: struct is not settable", key, r.Value.Interface()))
+}
+
+func (r structReflect) Iterate(fn func(string, Value) bool) bool {
+	return r.IterateUsing(HeapAllocator, fn)
+}
+
+func (r structReflect) IterateUsing(a Allocator, fn func(string, Value) bool) bool {
+	vr := a.allocValueReflect()
+	defer a.Free(vr)
+	return eachStructField(r.Value, func(e *TypeReflectCacheEntry, s string, value reflect.Value) bool {
+		return fn(s, vr.mustReuse(value, e, nil, nil))
+	})
+}
+
+func eachStructField(structVal reflect.Value, fn func(*TypeReflectCacheEntry, string, reflect.Value) bool) bool {
+	for _, fieldCacheEntry := range TypeReflectEntryOf(structVal.Type()).OrderedFields() {
+		fieldVal := fieldCacheEntry.GetFrom(structVal)
+		if fieldCacheEntry.CanOmit(fieldVal) {
+			// omit it
+			continue
+		}
+		ok := fn(fieldCacheEntry.TypeEntry, fieldCacheEntry.JsonName, fieldVal)
+		if !ok {
+			return false
+		}
+	}
+	return true
+}
+
+func (r structReflect) Unstructured() interface{} {
+	// Use number of struct fields as a cheap way to rough estimate map size
+	result := make(map[string]interface{}, r.Value.NumField())
+	r.Iterate(func(s string, value Value) bool {
+		result[s] = value.Unstructured()
+		return true
+	})
+	return result
+}
+
+func (r structReflect) Equals(m Map) bool {
+	return r.EqualsUsing(HeapAllocator, m)
+}
+
+func (r structReflect) EqualsUsing(a Allocator, m Map) bool {
+	// MapEquals uses zip and is fairly efficient for structReflect
+	return MapEqualsUsing(a, &r, m)
+}
+
+func (r structReflect) findJsonNameFieldAndNotEmpty(jsonName string) (reflect.Value, bool) {
+	structCacheEntry, ok := TypeReflectEntryOf(r.Value.Type()).Fields()[jsonName]
+	if !ok {
+		return reflect.Value{}, false
+	}
+	fieldVal := structCacheEntry.GetFrom(r.Value)
+	return fieldVal, !structCacheEntry.CanOmit(fieldVal)
+}
+
+func (r structReflect) findJsonNameField(jsonName string) (val reflect.Value, ok bool) {
+	structCacheEntry, ok := TypeReflectEntryOf(r.Value.Type()).Fields()[jsonName]
+	if !ok {
+		return reflect.Value{}, false
+	}
+	fieldVal := structCacheEntry.GetFrom(r.Value)
+	return fieldVal, !structCacheEntry.CanOmit(fieldVal)
+}
+
+func (r structReflect) Zip(other Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	return r.ZipUsing(HeapAllocator, other, order, fn)
+}
+
+func (r structReflect) ZipUsing(a Allocator, other Map, order MapTraverseOrder, fn func(key string, lhs, rhs Value) bool) bool {
+	if otherStruct, ok := other.(*structReflect); ok && r.Value.Type() == otherStruct.Value.Type() {
+		lhsvr, rhsvr := a.allocValueReflect(), a.allocValueReflect()
+		defer a.Free(lhsvr)
+		defer a.Free(rhsvr)
+		return r.structZip(otherStruct, lhsvr, rhsvr, fn)
+	}
+	return defaultMapZip(a, &r, other, order, fn)
+}
+
+// structZip provides an optimized zip for structReflect types. The zip is always lexical key ordered since there is
+// no additional cost to ordering the zip for structured types.
+func (r structReflect) structZip(other *structReflect, lhsvr, rhsvr *valueReflect, fn func(key string, lhs, rhs Value) bool) bool {
+	lhsVal := r.Value
+	rhsVal := other.Value
+
+	for _, fieldCacheEntry := range TypeReflectEntryOf(lhsVal.Type()).OrderedFields() {
+		lhsFieldVal := fieldCacheEntry.GetFrom(lhsVal)
+		rhsFieldVal := fieldCacheEntry.GetFrom(rhsVal)
+		lhsOmit := fieldCacheEntry.CanOmit(lhsFieldVal)
+		rhsOmit := fieldCacheEntry.CanOmit(rhsFieldVal)
+		if lhsOmit && rhsOmit {
+			continue
+		}
+		var lhsVal, rhsVal Value
+		if !lhsOmit {
+			lhsVal = lhsvr.mustReuse(lhsFieldVal, fieldCacheEntry.TypeEntry, nil, nil)
+		}
+		if !rhsOmit {
+			rhsVal = rhsvr.mustReuse(rhsFieldVal, fieldCacheEntry.TypeEntry, nil, nil)
+		}
+		if !fn(fieldCacheEntry.JsonName, lhsVal, rhsVal) {
+			return false
+		}
+	}
+	return true
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/value.go

@@ -0,0 +1,347 @@
+/*
+Copyright 2018 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 value
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"strings"
+
+	jsoniter "github.com/json-iterator/go"
+	"gopkg.in/yaml.v2"
+)
+
+var (
+	readPool  = jsoniter.NewIterator(jsoniter.ConfigCompatibleWithStandardLibrary).Pool()
+	writePool = jsoniter.NewStream(jsoniter.ConfigCompatibleWithStandardLibrary, nil, 1024).Pool()
+)
+
+// A Value corresponds to an 'atom' in the schema. It should return true
+// for at least one of the IsXXX methods below, or the value is
+// considered "invalid"
+type Value interface {
+	// IsMap returns true if the Value is a Map, false otherwise.
+	IsMap() bool
+	// IsList returns true if the Value is a List, false otherwise.
+	IsList() bool
+	// IsBool returns true if the Value is a bool, false otherwise.
+	IsBool() bool
+	// IsInt returns true if the Value is a int64, false otherwise.
+	IsInt() bool
+	// IsFloat returns true if the Value is a float64, false
+	// otherwise.
+	IsFloat() bool
+	// IsString returns true if the Value is a string, false
+	// otherwise.
+	IsString() bool
+	// IsMap returns true if the Value is null, false otherwise.
+	IsNull() bool
+
+	// AsMap converts the Value into a Map (or panic if the type
+	// doesn't allow it).
+	AsMap() Map
+	// AsMapUsing uses the provided allocator and converts the Value
+	// into a Map (or panic if the type doesn't allow it).
+	AsMapUsing(Allocator) Map
+	// AsList converts the Value into a List (or panic if the type
+	// doesn't allow it).
+	AsList() List
+	// AsListUsing uses the provided allocator and converts the Value
+	// into a List (or panic if the type doesn't allow it).
+	AsListUsing(Allocator) List
+	// AsBool converts the Value into a bool (or panic if the type
+	// doesn't allow it).
+	AsBool() bool
+	// AsInt converts the Value into an int64 (or panic if the type
+	// doesn't allow it).
+	AsInt() int64
+	// AsFloat converts the Value into a float64 (or panic if the type
+	// doesn't allow it).
+	AsFloat() float64
+	// AsString converts the Value into a string (or panic if the type
+	// doesn't allow it).
+	AsString() string
+
+	// Unstructured converts the Value into an Unstructured interface{}.
+	Unstructured() interface{}
+}
+
+// FromJSON is a helper function for reading a JSON document.
+func FromJSON(input []byte) (Value, error) {
+	return FromJSONFast(input)
+}
+
+// FromJSONFast is a helper function for reading a JSON document.
+func FromJSONFast(input []byte) (Value, error) {
+	iter := readPool.BorrowIterator(input)
+	defer readPool.ReturnIterator(iter)
+	return ReadJSONIter(iter)
+}
+
+// ToJSON is a helper function for producing a JSon document.
+func ToJSON(v Value) ([]byte, error) {
+	buf := bytes.Buffer{}
+	stream := writePool.BorrowStream(&buf)
+	defer writePool.ReturnStream(stream)
+	WriteJSONStream(v, stream)
+	b := stream.Buffer()
+	err := stream.Flush()
+	// Help jsoniter manage its buffers--without this, the next
+	// use of the stream is likely to require an allocation. Look
+	// at the jsoniter stream code to understand why. They were probably
+	// optimizing for folks using the buffer directly.
+	stream.SetBuffer(b[:0])
+	return buf.Bytes(), err
+}
+
+// ReadJSONIter reads a Value from a JSON iterator.
+func ReadJSONIter(iter *jsoniter.Iterator) (Value, error) {
+	v := iter.Read()
+	if iter.Error != nil && iter.Error != io.EOF {
+		return nil, iter.Error
+	}
+	return NewValueInterface(v), nil
+}
+
+// WriteJSONStream writes a value into a JSON stream.
+func WriteJSONStream(v Value, stream *jsoniter.Stream) {
+	stream.WriteVal(v.Unstructured())
+}
+
+// ToYAML marshals a value as YAML.
+func ToYAML(v Value) ([]byte, error) {
+	return yaml.Marshal(v.Unstructured())
+}
+
+// Equals returns true iff the two values are equal.
+func Equals(lhs, rhs Value) bool {
+	return EqualsUsing(HeapAllocator, lhs, rhs)
+}
+
+// EqualsUsing uses the provided allocator and returns true iff the two values are equal.
+func EqualsUsing(a Allocator, lhs, rhs Value) bool {
+	if lhs.IsFloat() || rhs.IsFloat() {
+		var lf float64
+		if lhs.IsFloat() {
+			lf = lhs.AsFloat()
+		} else if lhs.IsInt() {
+			lf = float64(lhs.AsInt())
+		} else {
+			return false
+		}
+		var rf float64
+		if rhs.IsFloat() {
+			rf = rhs.AsFloat()
+		} else if rhs.IsInt() {
+			rf = float64(rhs.AsInt())
+		} else {
+			return false
+		}
+		return lf == rf
+	}
+	if lhs.IsInt() {
+		if rhs.IsInt() {
+			return lhs.AsInt() == rhs.AsInt()
+		}
+		return false
+	} else if rhs.IsInt() {
+		return false
+	}
+	if lhs.IsString() {
+		if rhs.IsString() {
+			return lhs.AsString() == rhs.AsString()
+		}
+		return false
+	} else if rhs.IsString() {
+		return false
+	}
+	if lhs.IsBool() {
+		if rhs.IsBool() {
+			return lhs.AsBool() == rhs.AsBool()
+		}
+		return false
+	} else if rhs.IsBool() {
+		return false
+	}
+	if lhs.IsList() {
+		if rhs.IsList() {
+			lhsList := lhs.AsListUsing(a)
+			defer a.Free(lhsList)
+			rhsList := rhs.AsListUsing(a)
+			defer a.Free(rhsList)
+			return lhsList.EqualsUsing(a, rhsList)
+		}
+		return false
+	} else if rhs.IsList() {
+		return false
+	}
+	if lhs.IsMap() {
+		if rhs.IsMap() {
+			lhsList := lhs.AsMapUsing(a)
+			defer a.Free(lhsList)
+			rhsList := rhs.AsMapUsing(a)
+			defer a.Free(rhsList)
+			return lhsList.EqualsUsing(a, rhsList)
+		}
+		return false
+	} else if rhs.IsMap() {
+		return false
+	}
+	if lhs.IsNull() {
+		if rhs.IsNull() {
+			return true
+		}
+		return false
+	} else if rhs.IsNull() {
+		return false
+	}
+	// No field is set, on either objects.
+	return true
+}
+
+// ToString returns a human-readable representation of the value.
+func ToString(v Value) string {
+	if v.IsNull() {
+		return "null"
+	}
+	switch {
+	case v.IsFloat():
+		return fmt.Sprintf("%v", v.AsFloat())
+	case v.IsInt():
+		return fmt.Sprintf("%v", v.AsInt())
+	case v.IsString():
+		return fmt.Sprintf("%q", v.AsString())
+	case v.IsBool():
+		return fmt.Sprintf("%v", v.AsBool())
+	case v.IsList():
+		strs := []string{}
+		list := v.AsList()
+		for i := 0; i < list.Length(); i++ {
+			strs = append(strs, ToString(list.At(i)))
+		}
+		return "[" + strings.Join(strs, ",") + "]"
+	case v.IsMap():
+		strs := []string{}
+		v.AsMap().Iterate(func(k string, v Value) bool {
+			strs = append(strs, fmt.Sprintf("%v=%v", k, ToString(v)))
+			return true
+		})
+		return strings.Join(strs, "")
+	}
+	// No field is set, on either objects.
+	return "{{undefined}}"
+}
+
+// Less provides a total ordering for Value (so that they can be sorted, even
+// if they are of different types).
+func Less(lhs, rhs Value) bool {
+	return Compare(lhs, rhs) == -1
+}
+
+// Compare provides a total ordering for Value (so that they can be
+// sorted, even if they are of different types). The result will be 0 if
+// v==rhs, -1 if v < rhs, and +1 if v > rhs.
+func Compare(lhs, rhs Value) int {
+	return CompareUsing(HeapAllocator, lhs, rhs)
+}
+
+// CompareUsing uses the provided allocator and provides a total
+// ordering for Value (so that they can be sorted, even if they
+// are of different types). The result will be 0 if v==rhs, -1
+// if v < rhs, and +1 if v > rhs.
+func CompareUsing(a Allocator, lhs, rhs Value) int {
+	if lhs.IsFloat() {
+		if !rhs.IsFloat() {
+			// Extra: compare floats and ints numerically.
+			if rhs.IsInt() {
+				return FloatCompare(lhs.AsFloat(), float64(rhs.AsInt()))
+			}
+			return -1
+		}
+		return FloatCompare(lhs.AsFloat(), rhs.AsFloat())
+	} else if rhs.IsFloat() {
+		// Extra: compare floats and ints numerically.
+		if lhs.IsInt() {
+			return FloatCompare(float64(lhs.AsInt()), rhs.AsFloat())
+		}
+		return 1
+	}
+
+	if lhs.IsInt() {
+		if !rhs.IsInt() {
+			return -1
+		}
+		return IntCompare(lhs.AsInt(), rhs.AsInt())
+	} else if rhs.IsInt() {
+		return 1
+	}
+
+	if lhs.IsString() {
+		if !rhs.IsString() {
+			return -1
+		}
+		return strings.Compare(lhs.AsString(), rhs.AsString())
+	} else if rhs.IsString() {
+		return 1
+	}
+
+	if lhs.IsBool() {
+		if !rhs.IsBool() {
+			return -1
+		}
+		return BoolCompare(lhs.AsBool(), rhs.AsBool())
+	} else if rhs.IsBool() {
+		return 1
+	}
+
+	if lhs.IsList() {
+		if !rhs.IsList() {
+			return -1
+		}
+		lhsList := lhs.AsListUsing(a)
+		defer a.Free(lhsList)
+		rhsList := rhs.AsListUsing(a)
+		defer a.Free(rhsList)
+		return ListCompareUsing(a, lhsList, rhsList)
+	} else if rhs.IsList() {
+		return 1
+	}
+	if lhs.IsMap() {
+		if !rhs.IsMap() {
+			return -1
+		}
+		lhsMap := lhs.AsMapUsing(a)
+		defer a.Free(lhsMap)
+		rhsMap := rhs.AsMapUsing(a)
+		defer a.Free(rhsMap)
+		return MapCompareUsing(a, lhsMap, rhsMap)
+	} else if rhs.IsMap() {
+		return 1
+	}
+	if lhs.IsNull() {
+		if !rhs.IsNull() {
+			return -1
+		}
+		return 0
+	} else if rhs.IsNull() {
+		return 1
+	}
+
+	// Invalid Value-- nothing is set.
+	return 0
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/valuereflect.go

@@ -0,0 +1,294 @@
+/*
+Copyright 2019 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 value
+
+import (
+	"encoding/base64"
+	"fmt"
+	"reflect"
+)
+
+// NewValueReflect creates a Value backed by an "interface{}" type,
+// typically an structured object in Kubernetes world that is uses reflection to expose.
+// The provided "interface{}" value must be a pointer so that the value can be modified via reflection.
+// The provided "interface{}" may contain structs and types that are converted to Values
+// by the jsonMarshaler interface.
+func NewValueReflect(value interface{}) (Value, error) {
+	if value == nil {
+		return NewValueInterface(nil), nil
+	}
+	v := reflect.ValueOf(value)
+	if v.Kind() != reflect.Ptr {
+		// The root value to reflect on must be a pointer so that map.Set() and map.Delete() operations are possible.
+		return nil, fmt.Errorf("value provided to NewValueReflect must be a pointer")
+	}
+	return wrapValueReflect(v, nil, nil)
+}
+
+// wrapValueReflect wraps the provide reflect.Value as a value. If parent in the data tree is a map, parentMap
+// and parentMapKey must be provided so that the returned value may be set and deleted.
+func wrapValueReflect(value reflect.Value, parentMap, parentMapKey *reflect.Value) (Value, error) {
+	val := HeapAllocator.allocValueReflect()
+	return val.reuse(value, nil, parentMap, parentMapKey)
+}
+
+// wrapValueReflect wraps the provide reflect.Value as a value, and panics if there is an error. If parent in the data
+// tree is a map, parentMap and parentMapKey must be provided so that the returned value may be set and deleted.
+func mustWrapValueReflect(value reflect.Value, parentMap, parentMapKey *reflect.Value) Value {
+	v, err := wrapValueReflect(value, parentMap, parentMapKey)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// the value interface doesn't care about the type for value.IsNull, so we can use a constant
+var nilType = reflect.TypeOf(&struct{}{})
+
+// reuse replaces the value of the valueReflect. If parent in the data tree is a map, parentMap and parentMapKey
+// must be provided so that the returned value may be set and deleted.
+func (r *valueReflect) reuse(value reflect.Value, cacheEntry *TypeReflectCacheEntry, parentMap, parentMapKey *reflect.Value) (Value, error) {
+	if cacheEntry == nil {
+		cacheEntry = TypeReflectEntryOf(value.Type())
+	}
+	if cacheEntry.CanConvertToUnstructured() {
+		u, err := cacheEntry.ToUnstructured(value)
+		if err != nil {
+			return nil, err
+		}
+		if u == nil {
+			value = reflect.Zero(nilType)
+		} else {
+			value = reflect.ValueOf(u)
+		}
+	}
+	r.Value = dereference(value)
+	r.ParentMap = parentMap
+	r.ParentMapKey = parentMapKey
+	r.kind = kind(r.Value)
+	return r, nil
+}
+
+// mustReuse replaces the value of the valueReflect and panics if there is an error. If parent in the data tree is a
+// map, parentMap and parentMapKey must be provided so that the returned value may be set and deleted.
+func (r *valueReflect) mustReuse(value reflect.Value, cacheEntry *TypeReflectCacheEntry, parentMap, parentMapKey *reflect.Value) Value {
+	v, err := r.reuse(value, cacheEntry, parentMap, parentMapKey)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+func dereference(val reflect.Value) reflect.Value {
+	kind := val.Kind()
+	if (kind == reflect.Interface || kind == reflect.Ptr) && !safeIsNil(val) {
+		return val.Elem()
+	}
+	return val
+}
+
+type valueReflect struct {
+	ParentMap    *reflect.Value
+	ParentMapKey *reflect.Value
+	Value        reflect.Value
+	kind         reflectType
+}
+
+func (r valueReflect) IsMap() bool {
+	return r.kind == mapType || r.kind == structMapType
+}
+
+func (r valueReflect) IsList() bool {
+	return r.kind == listType
+}
+
+func (r valueReflect) IsBool() bool {
+	return r.kind == boolType
+}
+
+func (r valueReflect) IsInt() bool {
+	return r.kind == intType || r.kind == uintType
+}
+
+func (r valueReflect) IsFloat() bool {
+	return r.kind == floatType
+}
+
+func (r valueReflect) IsString() bool {
+	return r.kind == stringType || r.kind == byteStringType
+}
+
+func (r valueReflect) IsNull() bool {
+	return r.kind == nullType
+}
+
+type reflectType = int
+
+const (
+	mapType = iota
+	structMapType
+	listType
+	intType
+	uintType
+	floatType
+	stringType
+	byteStringType
+	boolType
+	nullType
+)
+
+func kind(v reflect.Value) reflectType {
+	typ := v.Type()
+	rk := typ.Kind()
+	switch rk {
+	case reflect.Map:
+		if v.IsNil() {
+			return nullType
+		}
+		return mapType
+	case reflect.Struct:
+		return structMapType
+	case reflect.Int, reflect.Int64, reflect.Int32, reflect.Int16, reflect.Int8:
+		return intType
+	case reflect.Uint, reflect.Uint32, reflect.Uint16, reflect.Uint8:
+		// Uint64 deliberately excluded, see valueUnstructured.Int.
+		return uintType
+	case reflect.Float64, reflect.Float32:
+		return floatType
+	case reflect.String:
+		return stringType
+	case reflect.Bool:
+		return boolType
+	case reflect.Slice:
+		if v.IsNil() {
+			return nullType
+		}
+		elemKind := typ.Elem().Kind()
+		if elemKind == reflect.Uint8 {
+			return byteStringType
+		}
+		return listType
+	case reflect.Chan, reflect.Func, reflect.Ptr, reflect.UnsafePointer, reflect.Interface:
+		if v.IsNil() {
+			return nullType
+		}
+		panic(fmt.Sprintf("unsupported type: %v", v.Type()))
+	default:
+		panic(fmt.Sprintf("unsupported type: %v", v.Type()))
+	}
+}
+
+// TODO find a cleaner way to avoid panics from reflect.IsNil()
+func safeIsNil(v reflect.Value) bool {
+	k := v.Kind()
+	switch k {
+	case reflect.Chan, reflect.Func, reflect.Map, reflect.Ptr, reflect.UnsafePointer, reflect.Interface, reflect.Slice:
+		return v.IsNil()
+	}
+	return false
+}
+
+func (r valueReflect) AsMap() Map {
+	return r.AsMapUsing(HeapAllocator)
+}
+
+func (r valueReflect) AsMapUsing(a Allocator) Map {
+	switch r.kind {
+	case structMapType:
+		v := a.allocStructReflect()
+		v.valueReflect = r
+		return v
+	case mapType:
+		v := a.allocMapReflect()
+		v.valueReflect = r
+		return v
+	default:
+		panic("value is not a map or struct")
+	}
+}
+
+func (r valueReflect) AsList() List {
+	return r.AsListUsing(HeapAllocator)
+}
+
+func (r valueReflect) AsListUsing(a Allocator) List {
+	if r.IsList() {
+		v := a.allocListReflect()
+		v.Value = r.Value
+		return v
+	}
+	panic("value is not a list")
+}
+
+func (r valueReflect) AsBool() bool {
+	if r.IsBool() {
+		return r.Value.Bool()
+	}
+	panic("value is not a bool")
+}
+
+func (r valueReflect) AsInt() int64 {
+	if r.kind == intType {
+		return r.Value.Int()
+	}
+	if r.kind == uintType {
+		return int64(r.Value.Uint())
+	}
+
+	panic("value is not an int")
+}
+
+func (r valueReflect) AsFloat() float64 {
+	if r.IsFloat() {
+		return r.Value.Float()
+	}
+	panic("value is not a float")
+}
+
+func (r valueReflect) AsString() string {
+	switch r.kind {
+	case stringType:
+		return r.Value.String()
+	case byteStringType:
+		return base64.StdEncoding.EncodeToString(r.Value.Bytes())
+	}
+	panic("value is not a string")
+}
+
+func (r valueReflect) Unstructured() interface{} {
+	val := r.Value
+	switch {
+	case r.IsNull():
+		return nil
+	case val.Kind() == reflect.Struct:
+		return structReflect{r}.Unstructured()
+	case val.Kind() == reflect.Map:
+		return mapReflect{valueReflect: r}.Unstructured()
+	case r.IsList():
+		return listReflect{r.Value}.Unstructured()
+	case r.IsString():
+		return r.AsString()
+	case r.IsInt():
+		return r.AsInt()
+	case r.IsBool():
+		return r.AsBool()
+	case r.IsFloat():
+		return r.AsFloat()
+	default:
+		panic(fmt.Sprintf("value of type %s is not a supported by value reflector", val.Type()))
+	}
+}

vendor/sigs.k8s.io/structured-merge-diff/v4/value/valueunstructured.go

@@ -0,0 +1,178 @@
+/*
+Copyright 2018 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 value
+
+import (
+	"fmt"
+)
+
+// NewValueInterface creates a Value backed by an "interface{}" type,
+// typically an unstructured object in Kubernetes world.
+// interface{} must be one of: map[string]interface{}, map[interface{}]interface{}, []interface{}, int types, float types,
+// string or boolean. Nested interface{} must also be one of these types.
+func NewValueInterface(v interface{}) Value {
+	return Value(HeapAllocator.allocValueUnstructured().reuse(v))
+}
+
+type valueUnstructured struct {
+	Value interface{}
+}
+
+// reuse replaces the value of the valueUnstructured.
+func (vi *valueUnstructured) reuse(value interface{}) Value {
+	vi.Value = value
+	return vi
+}
+
+func (v valueUnstructured) IsMap() bool {
+	if _, ok := v.Value.(map[string]interface{}); ok {
+		return true
+	}
+	if _, ok := v.Value.(map[interface{}]interface{}); ok {
+		return true
+	}
+	return false
+}
+
+func (v valueUnstructured) AsMap() Map {
+	return v.AsMapUsing(HeapAllocator)
+}
+
+func (v valueUnstructured) AsMapUsing(_ Allocator) Map {
+	if v.Value == nil {
+		panic("invalid nil")
+	}
+	switch t := v.Value.(type) {
+	case map[string]interface{}:
+		return mapUnstructuredString(t)
+	case map[interface{}]interface{}:
+		return mapUnstructuredInterface(t)
+	}
+	panic(fmt.Errorf("not a map: %#v", v))
+}
+
+func (v valueUnstructured) IsList() bool {
+	if v.Value == nil {
+		return false
+	}
+	_, ok := v.Value.([]interface{})
+	return ok
+}
+
+func (v valueUnstructured) AsList() List {
+	return v.AsListUsing(HeapAllocator)
+}
+
+func (v valueUnstructured) AsListUsing(_ Allocator) List {
+	return listUnstructured(v.Value.([]interface{}))
+}
+
+func (v valueUnstructured) IsFloat() bool {
+	if v.Value == nil {
+		return false
+	} else if _, ok := v.Value.(float64); ok {
+		return true
+	} else if _, ok := v.Value.(float32); ok {
+		return true
+	}
+	return false
+}
+
+func (v valueUnstructured) AsFloat() float64 {
+	if f, ok := v.Value.(float32); ok {
+		return float64(f)
+	}
+	return v.Value.(float64)
+}
+
+func (v valueUnstructured) IsInt() bool {
+	if v.Value == nil {
+		return false
+	} else if _, ok := v.Value.(int); ok {
+		return true
+	} else if _, ok := v.Value.(int8); ok {
+		return true
+	} else if _, ok := v.Value.(int16); ok {
+		return true
+	} else if _, ok := v.Value.(int32); ok {
+		return true
+	} else if _, ok := v.Value.(int64); ok {
+		return true
+	} else if _, ok := v.Value.(uint); ok {
+		return true
+	} else if _, ok := v.Value.(uint8); ok {
+		return true
+	} else if _, ok := v.Value.(uint16); ok {
+		return true
+	} else if _, ok := v.Value.(uint32); ok {
+		return true
+	}
+	return false
+}
+
+func (v valueUnstructured) AsInt() int64 {
+	if i, ok := v.Value.(int); ok {
+		return int64(i)
+	} else if i, ok := v.Value.(int8); ok {
+		return int64(i)
+	} else if i, ok := v.Value.(int16); ok {
+		return int64(i)
+	} else if i, ok := v.Value.(int32); ok {
+		return int64(i)
+	} else if i, ok := v.Value.(uint); ok {
+		return int64(i)
+	} else if i, ok := v.Value.(uint8); ok {
+		return int64(i)
+	} else if i, ok := v.Value.(uint16); ok {
+		return int64(i)
+	} else if i, ok := v.Value.(uint32); ok {
+		return int64(i)
+	}
+	return v.Value.(int64)
+}
+
+func (v valueUnstructured) IsString() bool {
+	if v.Value == nil {
+		return false
+	}
+	_, ok := v.Value.(string)
+	return ok
+}
+
+func (v valueUnstructured) AsString() string {
+	return v.Value.(string)
+}
+
+func (v valueUnstructured) IsBool() bool {
+	if v.Value == nil {
+		return false
+	}
+	_, ok := v.Value.(bool)
+	return ok
+}
+
+func (v valueUnstructured) AsBool() bool {
+	return v.Value.(bool)
+}
+
+func (v valueUnstructured) IsNull() bool {
+	return v.Value == nil
+}
+
+func (v valueUnstructured) Unstructured() interface{} {
+	return v.Value
+}