vendor dependencies

vendor/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/internal/conflict.go

@@ -0,0 +1,82 @@
+/*
+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 internal
+
+import (
+	"encoding/json"
+	"fmt"
+	"sort"
+	"strings"
+	"time"
+
+	"k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"sigs.k8s.io/structured-merge-diff/fieldpath"
+	"sigs.k8s.io/structured-merge-diff/merge"
+)
+
+// NewConflictError returns an error including details on the requests apply conflicts
+func NewConflictError(conflicts merge.Conflicts) *errors.StatusError {
+	causes := []metav1.StatusCause{}
+	for _, conflict := range conflicts {
+		causes = append(causes, metav1.StatusCause{
+			Type:    metav1.CauseTypeFieldManagerConflict,
+			Message: fmt.Sprintf("conflict with %v", printManager(conflict.Manager)),
+			Field:   conflict.Path.String(),
+		})
+	}
+	return errors.NewApplyConflict(causes, getConflictMessage(conflicts))
+}
+
+func getConflictMessage(conflicts merge.Conflicts) string {
+	if len(conflicts) == 1 {
+		return fmt.Sprintf("Apply failed with 1 conflict: conflict with %v: %v", printManager(conflicts[0].Manager), conflicts[0].Path)
+	}
+
+	m := map[string][]fieldpath.Path{}
+	for _, conflict := range conflicts {
+		m[conflict.Manager] = append(m[conflict.Manager], conflict.Path)
+	}
+
+	uniqueManagers := []string{}
+	for manager := range m {
+		uniqueManagers = append(uniqueManagers, manager)
+	}
+
+	// Print conflicts by sorted managers.
+	sort.Strings(uniqueManagers)
+
+	messages := []string{}
+	for _, manager := range uniqueManagers {
+		messages = append(messages, fmt.Sprintf("conflicts with %v:", printManager(manager)))
+		for _, path := range m[manager] {
+			messages = append(messages, fmt.Sprintf("- %v", path))
+		}
+	}
+	return fmt.Sprintf("Apply failed with %d conflicts: %s", len(conflicts), strings.Join(messages, "\n"))
+}
+
+func printManager(manager string) string {
+	encodedManager := &metav1.ManagedFieldsEntry{}
+	if err := json.Unmarshal([]byte(manager), encodedManager); err != nil {
+		return fmt.Sprintf("%q", manager)
+	}
+	if encodedManager.Operation == metav1.ManagedFieldsOperationUpdate {
+		return fmt.Sprintf("%q using %v at %v", encodedManager.Manager, encodedManager.APIVersion, encodedManager.Time.UTC().Format(time.RFC3339))
+	}
+	return fmt.Sprintf("%q", encodedManager.Manager)
+}

vendor/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/internal/fields.go

@@ -0,0 +1,95 @@
+/*
+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 internal
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"sigs.k8s.io/structured-merge-diff/fieldpath"
+)
+
+func newFields() metav1.Fields {
+	return metav1.Fields{Map: map[string]metav1.Fields{}}
+}
+
+func fieldsSet(f metav1.Fields, path fieldpath.Path, set *fieldpath.Set) error {
+	if len(f.Map) == 0 {
+		set.Insert(path)
+	}
+	for k := range f.Map {
+		if k == "." {
+			set.Insert(path)
+			continue
+		}
+		pe, err := NewPathElement(k)
+		if err != nil {
+			return err
+		}
+		path = append(path, pe)
+		err = fieldsSet(f.Map[k], path, set)
+		if err != nil {
+			return err
+		}
+		path = path[:len(path)-1]
+	}
+	return nil
+}
+
+// FieldsToSet creates a set paths from an input trie of fields
+func FieldsToSet(f metav1.Fields) (fieldpath.Set, error) {
+	set := fieldpath.Set{}
+	return set, fieldsSet(f, fieldpath.Path{}, &set)
+}
+
+func removeUselessDots(f metav1.Fields) metav1.Fields {
+	if _, ok := f.Map["."]; ok && len(f.Map) == 1 {
+		delete(f.Map, ".")
+		return f
+	}
+	for k, tf := range f.Map {
+		f.Map[k] = removeUselessDots(tf)
+	}
+	return f
+}
+
+// SetToFields creates a trie of fields from an input set of paths
+func SetToFields(s fieldpath.Set) (metav1.Fields, error) {
+	var err error
+	f := newFields()
+	s.Iterate(func(path fieldpath.Path) {
+		if err != nil {
+			return
+		}
+		tf := f
+		for _, pe := range path {
+			var str string
+			str, err = PathElementString(pe)
+			if err != nil {
+				break
+			}
+			if _, ok := tf.Map[str]; ok {
+				tf = tf.Map[str]
+			} else {
+				tf.Map[str] = newFields()
+				tf = tf.Map[str]
+			}
+		}
+		tf.Map["."] = newFields()
+	})
+	f = removeUselessDots(f)
+	return f, err
+}

vendor/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/internal/gvkparser.go

@@ -0,0 +1,120 @@
+/*
+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 internal
+
+import (
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/kube-openapi/pkg/schemaconv"
+	"k8s.io/kube-openapi/pkg/util/proto"
+	"sigs.k8s.io/structured-merge-diff/typed"
+)
+
+// groupVersionKindExtensionKey is the key used to lookup the
+// GroupVersionKind value for an object definition from the
+// definition's "extensions" map.
+const groupVersionKindExtensionKey = "x-kubernetes-group-version-kind"
+
+type gvkParser struct {
+	gvks   map[schema.GroupVersionKind]string
+	parser typed.Parser
+}
+
+func (p *gvkParser) Type(gvk schema.GroupVersionKind) typed.ParseableType {
+	typeName, ok := p.gvks[gvk]
+	if !ok {
+		return nil
+	}
+	return p.parser.Type(typeName)
+}
+
+func newGVKParser(models proto.Models) (*gvkParser, error) {
+	typeSchema, err := schemaconv.ToSchema(models)
+	if err != nil {
+		return nil, fmt.Errorf("failed to convert models to schema: %v", err)
+	}
+	parser := gvkParser{
+		gvks: map[schema.GroupVersionKind]string{},
+	}
+	parser.parser = typed.Parser{Schema: *typeSchema}
+	for _, modelName := range models.ListModels() {
+		model := models.LookupModel(modelName)
+		if model == nil {
+			panic(fmt.Sprintf("ListModels returns a model that can't be looked-up for: %v", modelName))
+		}
+		gvkList := parseGroupVersionKind(model)
+		for _, gvk := range gvkList {
+			if len(gvk.Kind) > 0 {
+				_, ok := parser.gvks[gvk]
+				if ok {
+					return nil, fmt.Errorf("duplicate entry for %v", gvk)
+				}
+				parser.gvks[gvk] = modelName
+			}
+		}
+	}
+	return &parser, nil
+}
+
+// Get and parse GroupVersionKind from the extension. Returns empty if it doesn't have one.
+func parseGroupVersionKind(s proto.Schema) []schema.GroupVersionKind {
+	extensions := s.GetExtensions()
+
+	gvkListResult := []schema.GroupVersionKind{}
+
+	// Get the extensions
+	gvkExtension, ok := extensions[groupVersionKindExtensionKey]
+	if !ok {
+		return []schema.GroupVersionKind{}
+	}
+
+	// gvk extension must be a list of at least 1 element.
+	gvkList, ok := gvkExtension.([]interface{})
+	if !ok {
+		return []schema.GroupVersionKind{}
+	}
+
+	for _, gvk := range gvkList {
+		// gvk extension list must be a map with group, version, and
+		// kind fields
+		gvkMap, ok := gvk.(map[interface{}]interface{})
+		if !ok {
+			continue
+		}
+		group, ok := gvkMap["group"].(string)
+		if !ok {
+			continue
+		}
+		version, ok := gvkMap["version"].(string)
+		if !ok {
+			continue
+		}
+		kind, ok := gvkMap["kind"].(string)
+		if !ok {
+			continue
+		}
+
+		gvkListResult = append(gvkListResult, schema.GroupVersionKind{
+			Group:   group,
+			Version: version,
+			Kind:    kind,
+		})
+	}
+
+	return gvkListResult
+}

vendor/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/internal/managedfields.go

@@ -0,0 +1,202 @@
+/*
+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 internal
+
+import (
+	"encoding/json"
+	"fmt"
+	"sort"
+	"time"
+
+	"k8s.io/apimachinery/pkg/api/meta"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"sigs.k8s.io/structured-merge-diff/fieldpath"
+)
+
+// RemoveObjectManagedFields removes the ManagedFields from the object
+// before we merge so that it doesn't appear in the ManagedFields
+// recursively.
+func RemoveObjectManagedFields(obj runtime.Object) {
+	accessor, err := meta.Accessor(obj)
+	if err != nil {
+		panic(fmt.Sprintf("couldn't get accessor: %v", err))
+	}
+	accessor.SetManagedFields(nil)
+}
+
+// DecodeObjectManagedFields extracts and converts the objects ManagedFields into a fieldpath.ManagedFields.
+func DecodeObjectManagedFields(from runtime.Object) (fieldpath.ManagedFields, error) {
+	if from == nil {
+		return make(map[string]*fieldpath.VersionedSet), nil
+	}
+	accessor, err := meta.Accessor(from)
+	if err != nil {
+		panic(fmt.Sprintf("couldn't get accessor: %v", err))
+	}
+
+	managed, err := decodeManagedFields(accessor.GetManagedFields())
+	if err != nil {
+		return nil, fmt.Errorf("failed to convert managed fields from API: %v", err)
+	}
+	return managed, err
+}
+
+// EncodeObjectManagedFields converts and stores the fieldpathManagedFields into the objects ManagedFields
+func EncodeObjectManagedFields(obj runtime.Object, fields fieldpath.ManagedFields) error {
+	accessor, err := meta.Accessor(obj)
+	if err != nil {
+		panic(fmt.Sprintf("couldn't get accessor: %v", err))
+	}
+
+	managed, err := encodeManagedFields(fields)
+	if err != nil {
+		return fmt.Errorf("failed to convert back managed fields to API: %v", err)
+	}
+	accessor.SetManagedFields(managed)
+
+	return nil
+}
+
+// decodeManagedFields converts ManagedFields from the wire format (api format)
+// to the format used by sigs.k8s.io/structured-merge-diff
+func decodeManagedFields(encodedManagedFields []metav1.ManagedFieldsEntry) (managedFields fieldpath.ManagedFields, err error) {
+	managedFields = make(map[string]*fieldpath.VersionedSet, len(encodedManagedFields))
+	for _, encodedVersionedSet := range encodedManagedFields {
+		manager, err := BuildManagerIdentifier(&encodedVersionedSet)
+		if err != nil {
+			return nil, fmt.Errorf("error decoding manager from %v: %v", encodedVersionedSet, err)
+		}
+		managedFields[manager], err = decodeVersionedSet(&encodedVersionedSet)
+		if err != nil {
+			return nil, fmt.Errorf("error decoding versioned set from %v: %v", encodedVersionedSet, err)
+		}
+	}
+	return managedFields, nil
+}
+
+// BuildManagerIdentifier creates a manager identifier string from a ManagedFieldsEntry
+func BuildManagerIdentifier(encodedManager *metav1.ManagedFieldsEntry) (manager string, err error) {
+	encodedManagerCopy := *encodedManager
+
+	// Never include the fields in the manager identifier
+	encodedManagerCopy.Fields = nil
+
+	// For appliers, don't include the APIVersion or Time in the manager identifier,
+	// so it will always have the same manager identifier each time it applied.
+	if encodedManager.Operation == metav1.ManagedFieldsOperationApply {
+		encodedManagerCopy.APIVersion = ""
+		encodedManagerCopy.Time = nil
+	}
+
+	// Use the remaining fields to build the manager identifier
+	b, err := json.Marshal(&encodedManagerCopy)
+	if err != nil {
+		return "", fmt.Errorf("error marshalling manager identifier: %v", err)
+	}
+
+	return string(b), nil
+}
+
+func decodeVersionedSet(encodedVersionedSet *metav1.ManagedFieldsEntry) (versionedSet *fieldpath.VersionedSet, err error) {
+	versionedSet = &fieldpath.VersionedSet{}
+	versionedSet.APIVersion = fieldpath.APIVersion(encodedVersionedSet.APIVersion)
+	if encodedVersionedSet.Operation == metav1.ManagedFieldsOperationApply {
+		versionedSet.Applied = true
+	}
+
+	fields := metav1.Fields{}
+	if encodedVersionedSet.Fields != nil {
+		fields = *encodedVersionedSet.Fields
+	}
+	set, err := FieldsToSet(fields)
+	if err != nil {
+		return nil, fmt.Errorf("error decoding set: %v", err)
+	}
+	versionedSet.Set = &set
+	return versionedSet, nil
+}
+
+// encodeManagedFields converts ManagedFields from the the format used by
+// sigs.k8s.io/structured-merge-diff to the the wire format (api format)
+func encodeManagedFields(managedFields fieldpath.ManagedFields) (encodedManagedFields []metav1.ManagedFieldsEntry, err error) {
+	// Sort the keys so a predictable order will be used.
+	managers := []string{}
+	for manager := range managedFields {
+		managers = append(managers, manager)
+	}
+	sort.Strings(managers)
+
+	encodedManagedFields = []metav1.ManagedFieldsEntry{}
+	for _, manager := range managers {
+		versionedSet := managedFields[manager]
+		v, err := encodeManagerVersionedSet(manager, versionedSet)
+		if err != nil {
+			return nil, fmt.Errorf("error encoding versioned set for %v: %v", manager, err)
+		}
+		encodedManagedFields = append(encodedManagedFields, *v)
+	}
+	return sortEncodedManagedFields(encodedManagedFields)
+}
+
+func sortEncodedManagedFields(encodedManagedFields []metav1.ManagedFieldsEntry) (sortedManagedFields []metav1.ManagedFieldsEntry, err error) {
+	sort.Slice(encodedManagedFields, func(i, j int) bool {
+		p, q := encodedManagedFields[i], encodedManagedFields[j]
+
+		if p.Operation != q.Operation {
+			return p.Operation < q.Operation
+		}
+
+		ntime := &metav1.Time{Time: time.Time{}}
+		if p.Time == nil {
+			p.Time = ntime
+		}
+		if q.Time == nil {
+			q.Time = ntime
+		}
+		if !p.Time.Equal(q.Time) {
+			return p.Time.Before(q.Time)
+		}
+
+		return p.Manager < q.Manager
+	})
+
+	return encodedManagedFields, nil
+}
+
+func encodeManagerVersionedSet(manager string, versionedSet *fieldpath.VersionedSet) (encodedVersionedSet *metav1.ManagedFieldsEntry, err error) {
+	encodedVersionedSet = &metav1.ManagedFieldsEntry{}
+
+	// Get as many fields as we can from the manager identifier
+	err = json.Unmarshal([]byte(manager), encodedVersionedSet)
+	if err != nil {
+		return nil, fmt.Errorf("error unmarshalling manager identifier %v: %v", manager, err)
+	}
+
+	// Get the APIVersion, Operation, and Fields from the VersionedSet
+	encodedVersionedSet.APIVersion = string(versionedSet.APIVersion)
+	if versionedSet.Applied {
+		encodedVersionedSet.Operation = metav1.ManagedFieldsOperationApply
+	}
+	fields, err := SetToFields(*versionedSet.Set)
+	if err != nil {
+		return nil, fmt.Errorf("error encoding set: %v", err)
+	}
+	encodedVersionedSet.Fields = &fields
+
+	return encodedVersionedSet, nil
+}

vendor/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/internal/pathelement.go

@@ -0,0 +1,140 @@
+/*
+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 internal
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"sigs.k8s.io/structured-merge-diff/fieldpath"
+	"sigs.k8s.io/structured-merge-diff/value"
+)
+
+const (
+	// Field indicates that the content of this path element is a field's name
+	Field = "f"
+
+	// Value indicates that the content of this path element is a field's value
+	Value = "v"
+
+	// Index indicates that the content of this path element is an index in an array
+	Index = "i"
+
+	// Key indicates that the content of this path element is a key value map
+	Key = "k"
+
+	// Separator separates the type of a path element from the contents
+	Separator = ":"
+)
+
+// NewPathElement parses a serialized path element
+func NewPathElement(s string) (fieldpath.PathElement, error) {
+	split := strings.SplitN(s, Separator, 2)
+	if len(split) < 2 {
+		return fieldpath.PathElement{}, fmt.Errorf("missing colon: %v", s)
+	}
+	switch split[0] {
+	case Field:
+		return fieldpath.PathElement{
+			FieldName: &split[1],
+		}, nil
+	case Value:
+		val, err := value.FromJSON([]byte(split[1]))
+		if err != nil {
+			return fieldpath.PathElement{}, err
+		}
+		return fieldpath.PathElement{
+			Value: &val,
+		}, nil
+	case Index:
+		i, err := strconv.Atoi(split[1])
+		if err != nil {
+			return fieldpath.PathElement{}, err
+		}
+		return fieldpath.PathElement{
+			Index: &i,
+		}, nil
+	case Key:
+		kv := map[string]json.RawMessage{}
+		err := json.Unmarshal([]byte(split[1]), &kv)
+		if err != nil {
+			return fieldpath.PathElement{}, err
+		}
+		fields := []value.Field{}
+		for k, v := range kv {
+			b, err := json.Marshal(v)
+			if err != nil {
+				return fieldpath.PathElement{}, err
+			}
+			val, err := value.FromJSON(b)
+			if err != nil {
+				return fieldpath.PathElement{}, err
+			}
+
+			fields = append(fields, value.Field{
+				Name:  k,
+				Value: val,
+			})
+		}
+		return fieldpath.PathElement{
+			Key: fields,
+		}, nil
+	default:
+		// Ignore unknown key types
+		return fieldpath.PathElement{}, nil
+	}
+}
+
+// PathElementString serializes a path element
+func PathElementString(pe fieldpath.PathElement) (string, error) {
+	switch {
+	case pe.FieldName != nil:
+		return Field + Separator + *pe.FieldName, nil
+	case len(pe.Key) > 0:
+		kv := map[string]json.RawMessage{}
+		for _, k := range pe.Key {
+			b, err := k.Value.ToJSON()
+			if err != nil {
+				return "", err
+			}
+			m := json.RawMessage{}
+			err = json.Unmarshal(b, &m)
+			if err != nil {
+				return "", err
+			}
+			kv[k.Name] = m
+		}
+		b, err := json.Marshal(kv)
+		if err != nil {
+			return "", err
+		}
+		return Key + ":" + string(b), nil
+	case pe.Value != nil:
+		b, err := pe.Value.ToJSON()
+		if err != nil {
+			return "", err
+		}
+		return Value + ":" + string(b), nil
+	case pe.Index != nil:
+		return Index + ":" + strconv.Itoa(*pe.Index), nil
+	default:
+		return "", errors.New("Invalid type of path element")
+	}
+}

vendor/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/internal/typeconverter.go

@@ -0,0 +1,127 @@
+/*
+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 internal
+
+import (
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/kube-openapi/pkg/util/proto"
+	"sigs.k8s.io/structured-merge-diff/typed"
+	"sigs.k8s.io/structured-merge-diff/value"
+	"sigs.k8s.io/yaml"
+)
+
+// TypeConverter allows you to convert from runtime.Object to
+// typed.TypedValue and the other way around.
+type TypeConverter interface {
+	ObjectToTyped(runtime.Object) (typed.TypedValue, error)
+	YAMLToTyped([]byte) (typed.TypedValue, error)
+	TypedToObject(typed.TypedValue) (runtime.Object, error)
+}
+
+// DeducedTypeConverter is a TypeConverter for CRDs that don't have a
+// schema. It does implement the same interface though (and create the
+// same types of objects), so that everything can still work the same.
+// CRDs are merged with all their fields being "atomic" (lists
+// included).
+//
+// Note that this is not going to be sufficient for converting to/from
+// CRDs that have a schema defined (we don't support that schema yet).
+// TODO(jennybuckley): Use the schema provided by a CRD if it exists.
+type DeducedTypeConverter struct{}
+
+var _ TypeConverter = DeducedTypeConverter{}
+
+// ObjectToTyped converts an object into a TypedValue with a "deduced type".
+func (DeducedTypeConverter) ObjectToTyped(obj runtime.Object) (typed.TypedValue, error) {
+	u, err := runtime.DefaultUnstructuredConverter.ToUnstructured(obj)
+	if err != nil {
+		return nil, err
+	}
+	return typed.DeducedParseableType{}.FromUnstructured(u)
+}
+
+// YAMLToTyped parses a yaml object into a TypedValue with a "deduced type".
+func (DeducedTypeConverter) YAMLToTyped(from []byte) (typed.TypedValue, error) {
+	return typed.DeducedParseableType{}.FromYAML(typed.YAMLObject(from))
+}
+
+// TypedToObject transforms the typed value into a runtime.Object. That
+// is not specific to deduced type.
+func (DeducedTypeConverter) TypedToObject(value typed.TypedValue) (runtime.Object, error) {
+	return valueToObject(value.AsValue())
+}
+
+type typeConverter struct {
+	parser *gvkParser
+}
+
+var _ TypeConverter = &typeConverter{}
+
+// NewTypeConverter builds a TypeConverter from a proto.Models. This
+// will automatically find the proper version of the object, and the
+// corresponding schema information.
+func NewTypeConverter(models proto.Models) (TypeConverter, error) {
+	parser, err := newGVKParser(models)
+	if err != nil {
+		return nil, err
+	}
+	return &typeConverter{parser: parser}, nil
+}
+
+func (c *typeConverter) ObjectToTyped(obj runtime.Object) (typed.TypedValue, error) {
+	u, err := runtime.DefaultUnstructuredConverter.ToUnstructured(obj)
+	if err != nil {
+		return nil, err
+	}
+	gvk := obj.GetObjectKind().GroupVersionKind()
+	t := c.parser.Type(gvk)
+	if t == nil {
+		return nil, fmt.Errorf("no corresponding type for %v", gvk)
+	}
+	return t.FromUnstructured(u)
+}
+
+func (c *typeConverter) YAMLToTyped(from []byte) (typed.TypedValue, error) {
+	unstructured := &unstructured.Unstructured{Object: map[string]interface{}{}}
+
+	if err := yaml.Unmarshal(from, &unstructured.Object); err != nil {
+		return nil, fmt.Errorf("error decoding YAML: %v", err)
+	}
+
+	gvk := unstructured.GetObjectKind().GroupVersionKind()
+	t := c.parser.Type(gvk)
+	if t == nil {
+		return nil, fmt.Errorf("no corresponding type for %v", gvk)
+	}
+	return t.FromYAML(typed.YAMLObject(string(from)))
+}
+
+func (c *typeConverter) TypedToObject(value typed.TypedValue) (runtime.Object, error) {
+	return valueToObject(value.AsValue())
+}
+
+func valueToObject(value *value.Value) (runtime.Object, error) {
+	vu := value.ToUnstructured(false)
+	u, ok := vu.(map[string]interface{})
+	if !ok {
+		return nil, fmt.Errorf("failed to convert typed to unstructured: want map, got %T", vu)
+	}
+	return &unstructured.Unstructured{Object: u}, nil
+}

vendor/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/internal/versionconverter.go

@@ -0,0 +1,101 @@
+/*
+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 internal
+
+import (
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"sigs.k8s.io/structured-merge-diff/fieldpath"
+	"sigs.k8s.io/structured-merge-diff/merge"
+	"sigs.k8s.io/structured-merge-diff/typed"
+)
+
+// versionConverter is an implementation of
+// sigs.k8s.io/structured-merge-diff/merge.Converter
+type versionConverter struct {
+	typeConverter   TypeConverter
+	objectConvertor runtime.ObjectConvertor
+	hubGetter       func(from schema.GroupVersion) schema.GroupVersion
+}
+
+var _ merge.Converter = &versionConverter{}
+
+// NewVersionConverter builds a VersionConverter from a TypeConverter and an ObjectConvertor.
+func NewVersionConverter(t TypeConverter, o runtime.ObjectConvertor, h schema.GroupVersion) merge.Converter {
+	return &versionConverter{
+		typeConverter:   t,
+		objectConvertor: o,
+		hubGetter: func(from schema.GroupVersion) schema.GroupVersion {
+			return schema.GroupVersion{
+				Group:   from.Group,
+				Version: h.Version,
+			}
+		},
+	}
+}
+
+// NewCRDVersionConverter builds a VersionConverter for CRDs from a TypeConverter and an ObjectConvertor.
+func NewCRDVersionConverter(t TypeConverter, o runtime.ObjectConvertor, h schema.GroupVersion) merge.Converter {
+	return &versionConverter{
+		typeConverter:   t,
+		objectConvertor: o,
+		hubGetter: func(from schema.GroupVersion) schema.GroupVersion {
+			return h
+		},
+	}
+}
+
+// Convert implements sigs.k8s.io/structured-merge-diff/merge.Converter
+func (v *versionConverter) Convert(object typed.TypedValue, version fieldpath.APIVersion) (typed.TypedValue, error) {
+	// Convert the smd typed value to a kubernetes object.
+	objectToConvert, err := v.typeConverter.TypedToObject(object)
+	if err != nil {
+		return object, err
+	}
+
+	// Parse the target groupVersion.
+	groupVersion, err := schema.ParseGroupVersion(string(version))
+	if err != nil {
+		return object, err
+	}
+
+	// If attempting to convert to the same version as we already have, just return it.
+	fromVersion := objectToConvert.GetObjectKind().GroupVersionKind().GroupVersion()
+	if fromVersion == groupVersion {
+		return object, nil
+	}
+
+	// Convert to internal
+	internalObject, err := v.objectConvertor.ConvertToVersion(objectToConvert, v.hubGetter(fromVersion))
+	if err != nil {
+		return object, err
+	}
+
+	// Convert the object into the target version
+	convertedObject, err := v.objectConvertor.ConvertToVersion(internalObject, groupVersion)
+	if err != nil {
+		return object, err
+	}
+
+	// Convert the object back to a smd typed value and return it.
+	return v.typeConverter.ObjectToTyped(convertedObject)
+}
+
+// IsMissingVersionError
+func (v *versionConverter) IsMissingVersionError(err error) bool {
+	return runtime.IsNotRegisteredError(err)
+}