add k8s client

vendor/k8s.io/apimachinery/pkg/conversion/cloner.go

@@ -0,0 +1,249 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package conversion
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// Cloner knows how to copy one type to another.
+type Cloner struct {
+	// Map from the type to a function which can do the deep copy.
+	deepCopyFuncs          map[reflect.Type]reflect.Value
+	generatedDeepCopyFuncs map[reflect.Type]func(in interface{}, out interface{}, c *Cloner) error
+}
+
+// NewCloner creates a new Cloner object.
+func NewCloner() *Cloner {
+	c := &Cloner{
+		deepCopyFuncs:          map[reflect.Type]reflect.Value{},
+		generatedDeepCopyFuncs: map[reflect.Type]func(in interface{}, out interface{}, c *Cloner) error{},
+	}
+	if err := c.RegisterDeepCopyFunc(byteSliceDeepCopy); err != nil {
+		// If one of the deep-copy functions is malformed, detect it immediately.
+		panic(err)
+	}
+	return c
+}
+
+// Prevent recursing into every byte...
+func byteSliceDeepCopy(in *[]byte, out *[]byte, c *Cloner) error {
+	if *in != nil {
+		*out = make([]byte, len(*in))
+		copy(*out, *in)
+	} else {
+		*out = nil
+	}
+	return nil
+}
+
+// Verifies whether a deep-copy function has a correct signature.
+func verifyDeepCopyFunctionSignature(ft reflect.Type) error {
+	if ft.Kind() != reflect.Func {
+		return fmt.Errorf("expected func, got: %v", ft)
+	}
+	if ft.NumIn() != 3 {
+		return fmt.Errorf("expected three 'in' params, got %v", ft)
+	}
+	if ft.NumOut() != 1 {
+		return fmt.Errorf("expected one 'out' param, got %v", ft)
+	}
+	if ft.In(0).Kind() != reflect.Ptr {
+		return fmt.Errorf("expected pointer arg for 'in' param 0, got: %v", ft)
+	}
+	if ft.In(1) != ft.In(0) {
+		return fmt.Errorf("expected 'in' param 0 the same as param 1, got: %v", ft)
+	}
+	var forClonerType Cloner
+	if expected := reflect.TypeOf(&forClonerType); ft.In(2) != expected {
+		return fmt.Errorf("expected '%v' arg for 'in' param 2, got: '%v'", expected, ft.In(2))
+	}
+	var forErrorType error
+	// This convolution is necessary, otherwise TypeOf picks up on the fact
+	// that forErrorType is nil
+	errorType := reflect.TypeOf(&forErrorType).Elem()
+	if ft.Out(0) != errorType {
+		return fmt.Errorf("expected error return, got: %v", ft)
+	}
+	return nil
+}
+
+// RegisterGeneratedDeepCopyFunc registers a copying func with the Cloner.
+// deepCopyFunc must take three parameters: a type input, a pointer to a
+// type output, and a pointer to Cloner. It should return an error.
+//
+// Example:
+// c.RegisterGeneratedDeepCopyFunc(
+//         func(in Pod, out *Pod, c *Cloner) error {
+//                 // deep copy logic...
+//                 return nil
+//          })
+func (c *Cloner) RegisterDeepCopyFunc(deepCopyFunc interface{}) error {
+	fv := reflect.ValueOf(deepCopyFunc)
+	ft := fv.Type()
+	if err := verifyDeepCopyFunctionSignature(ft); err != nil {
+		return err
+	}
+	c.deepCopyFuncs[ft.In(0)] = fv
+	return nil
+}
+
+// GeneratedDeepCopyFunc bundles an untyped generated deep-copy function of a type
+// with a reflection type object used as a key to lookup the deep-copy function.
+type GeneratedDeepCopyFunc struct {
+	Fn     func(in interface{}, out interface{}, c *Cloner) error
+	InType reflect.Type
+}
+
+// Similar to RegisterDeepCopyFunc, but registers deep copy function that were
+// automatically generated.
+func (c *Cloner) RegisterGeneratedDeepCopyFunc(fn GeneratedDeepCopyFunc) error {
+	c.generatedDeepCopyFuncs[fn.InType] = fn.Fn
+	return nil
+}
+
+// DeepCopy will perform a deep copy of a given object.
+func (c *Cloner) DeepCopy(in interface{}) (interface{}, error) {
+	// Can be invalid if we run DeepCopy(X) where X is a nil interface type.
+	// For example, we get an invalid value when someone tries to deep-copy
+	// a nil labels.Selector.
+	// This does not occur if X is nil and is a pointer to a concrete type.
+	if in == nil {
+		return nil, nil
+	}
+	inValue := reflect.ValueOf(in)
+	outValue, err := c.deepCopy(inValue)
+	if err != nil {
+		return nil, err
+	}
+	return outValue.Interface(), nil
+}
+
+func (c *Cloner) deepCopy(src reflect.Value) (reflect.Value, error) {
+	inType := src.Type()
+
+	switch src.Kind() {
+	case reflect.Interface, reflect.Ptr, reflect.Map, reflect.Slice:
+		if src.IsNil() {
+			return src, nil
+		}
+	}
+
+	if fv, ok := c.deepCopyFuncs[inType]; ok {
+		return c.customDeepCopy(src, fv)
+	}
+	if fv, ok := c.generatedDeepCopyFuncs[inType]; ok {
+		var outValue reflect.Value
+		outValue = reflect.New(inType.Elem())
+		err := fv(src.Interface(), outValue.Interface(), c)
+		return outValue, err
+	}
+	return c.defaultDeepCopy(src)
+}
+
+func (c *Cloner) customDeepCopy(src, fv reflect.Value) (reflect.Value, error) {
+	outValue := reflect.New(src.Type().Elem())
+	args := []reflect.Value{src, outValue, reflect.ValueOf(c)}
+	result := fv.Call(args)[0].Interface()
+	// This convolution is necessary because nil interfaces won't convert
+	// to error.
+	if result == nil {
+		return outValue, nil
+	}
+	return outValue, result.(error)
+}
+
+func (c *Cloner) defaultDeepCopy(src reflect.Value) (reflect.Value, error) {
+	switch src.Kind() {
+	case reflect.Chan, reflect.Func, reflect.UnsafePointer, reflect.Uintptr:
+		return src, fmt.Errorf("cannot deep copy kind: %s", src.Kind())
+	case reflect.Array:
+		dst := reflect.New(src.Type())
+		for i := 0; i < src.Len(); i++ {
+			copyVal, err := c.deepCopy(src.Index(i))
+			if err != nil {
+				return src, err
+			}
+			dst.Elem().Index(i).Set(copyVal)
+		}
+		return dst.Elem(), nil
+	case reflect.Interface:
+		if src.IsNil() {
+			return src, nil
+		}
+		return c.deepCopy(src.Elem())
+	case reflect.Map:
+		if src.IsNil() {
+			return src, nil
+		}
+		dst := reflect.MakeMap(src.Type())
+		for _, k := range src.MapKeys() {
+			copyVal, err := c.deepCopy(src.MapIndex(k))
+			if err != nil {
+				return src, err
+			}
+			dst.SetMapIndex(k, copyVal)
+		}
+		return dst, nil
+	case reflect.Ptr:
+		if src.IsNil() {
+			return src, nil
+		}
+		dst := reflect.New(src.Type().Elem())
+		copyVal, err := c.deepCopy(src.Elem())
+		if err != nil {
+			return src, err
+		}
+		dst.Elem().Set(copyVal)
+		return dst, nil
+	case reflect.Slice:
+		if src.IsNil() {
+			return src, nil
+		}
+		dst := reflect.MakeSlice(src.Type(), 0, src.Len())
+		for i := 0; i < src.Len(); i++ {
+			copyVal, err := c.deepCopy(src.Index(i))
+			if err != nil {
+				return src, err
+			}
+			dst = reflect.Append(dst, copyVal)
+		}
+		return dst, nil
+	case reflect.Struct:
+		dst := reflect.New(src.Type())
+		for i := 0; i < src.NumField(); i++ {
+			if !dst.Elem().Field(i).CanSet() {
+				// Can't set private fields. At this point, the
+				// best we can do is a shallow copy. For
+				// example, time.Time is a value type with
+				// private members that can be shallow copied.
+				return src, nil
+			}
+			copyVal, err := c.deepCopy(src.Field(i))
+			if err != nil {
+				return src, err
+			}
+			dst.Elem().Field(i).Set(copyVal)
+		}
+		return dst.Elem(), nil
+
+	default:
+		// Value types like numbers, booleans, and strings.
+		return src, nil
+	}
+}

vendor/k8s.io/apimachinery/pkg/conversion/converter.go

@@ -0,0 +1,898 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package conversion
+
+import (
+	"fmt"
+	"reflect"
+)
+
+type typePair struct {
+	source reflect.Type
+	dest   reflect.Type
+}
+
+type typeNamePair struct {
+	fieldType reflect.Type
+	fieldName string
+}
+
+// DebugLogger allows you to get debugging messages if necessary.
+type DebugLogger interface {
+	Logf(format string, args ...interface{})
+}
+
+type NameFunc func(t reflect.Type) string
+
+var DefaultNameFunc = func(t reflect.Type) string { return t.Name() }
+
+type GenericConversionFunc func(a, b interface{}, scope Scope) (bool, error)
+
+// Converter knows how to convert one type to another.
+type Converter struct {
+	// Map from the conversion pair to a function which can
+	// do the conversion.
+	conversionFuncs          ConversionFuncs
+	generatedConversionFuncs ConversionFuncs
+
+	// genericConversions are called during normal conversion to offer a "fast-path"
+	// that avoids all reflection. These methods are not called outside of the .Convert()
+	// method.
+	genericConversions []GenericConversionFunc
+
+	// Set of conversions that should be treated as a no-op
+	ignoredConversions map[typePair]struct{}
+
+	// This is a map from a source field type and name, to a list of destination
+	// field type and name.
+	structFieldDests map[typeNamePair][]typeNamePair
+
+	// Allows for the opposite lookup of structFieldDests. So that SourceFromDest
+	// copy flag also works. So this is a map of destination field name, to potential
+	// source field name and type to look for.
+	structFieldSources map[typeNamePair][]typeNamePair
+
+	// Map from an input type to a function which can apply a key name mapping
+	inputFieldMappingFuncs map[reflect.Type]FieldMappingFunc
+
+	// Map from an input type to a set of default conversion flags.
+	inputDefaultFlags map[reflect.Type]FieldMatchingFlags
+
+	// If non-nil, will be called to print helpful debugging info. Quite verbose.
+	Debug DebugLogger
+
+	// nameFunc is called to retrieve the name of a type; this name is used for the
+	// purpose of deciding whether two types match or not (i.e., will we attempt to
+	// do a conversion). The default returns the go type name.
+	nameFunc func(t reflect.Type) string
+}
+
+// NewConverter creates a new Converter object.
+func NewConverter(nameFn NameFunc) *Converter {
+	c := &Converter{
+		conversionFuncs:          NewConversionFuncs(),
+		generatedConversionFuncs: NewConversionFuncs(),
+		ignoredConversions:       make(map[typePair]struct{}),
+		nameFunc:                 nameFn,
+		structFieldDests:         make(map[typeNamePair][]typeNamePair),
+		structFieldSources:       make(map[typeNamePair][]typeNamePair),
+
+		inputFieldMappingFuncs: make(map[reflect.Type]FieldMappingFunc),
+		inputDefaultFlags:      make(map[reflect.Type]FieldMatchingFlags),
+	}
+	c.RegisterConversionFunc(Convert_Slice_byte_To_Slice_byte)
+	return c
+}
+
+// AddGenericConversionFunc adds a function that accepts the ConversionFunc call pattern
+// (for two conversion types) to the converter. These functions are checked first during
+// a normal conversion, but are otherwise not called. Use AddConversionFuncs when registering
+// typed conversions.
+func (c *Converter) AddGenericConversionFunc(fn GenericConversionFunc) {
+	c.genericConversions = append(c.genericConversions, fn)
+}
+
+// WithConversions returns a Converter that is a copy of c but with the additional
+// fns merged on top.
+func (c *Converter) WithConversions(fns ConversionFuncs) *Converter {
+	copied := *c
+	copied.conversionFuncs = c.conversionFuncs.Merge(fns)
+	return &copied
+}
+
+// DefaultMeta returns the conversion FieldMappingFunc and meta for a given type.
+func (c *Converter) DefaultMeta(t reflect.Type) (FieldMatchingFlags, *Meta) {
+	return c.inputDefaultFlags[t], &Meta{
+		KeyNameMapping: c.inputFieldMappingFuncs[t],
+	}
+}
+
+// Convert_Slice_byte_To_Slice_byte prevents recursing into every byte
+func Convert_Slice_byte_To_Slice_byte(in *[]byte, out *[]byte, s Scope) error {
+	if *in == nil {
+		*out = nil
+		return nil
+	}
+	*out = make([]byte, len(*in))
+	copy(*out, *in)
+	return nil
+}
+
+// Scope is passed to conversion funcs to allow them to continue an ongoing conversion.
+// If multiple converters exist in the system, Scope will allow you to use the correct one
+// from a conversion function--that is, the one your conversion function was called by.
+type Scope interface {
+	// Call Convert to convert sub-objects. Note that if you call it with your own exact
+	// parameters, you'll run out of stack space before anything useful happens.
+	Convert(src, dest interface{}, flags FieldMatchingFlags) error
+
+	// DefaultConvert performs the default conversion, without calling a conversion func
+	// on the current stack frame. This makes it safe to call from a conversion func.
+	DefaultConvert(src, dest interface{}, flags FieldMatchingFlags) error
+
+	// SrcTags and DestTags contain the struct tags that src and dest had, respectively.
+	// If the enclosing object was not a struct, then these will contain no tags, of course.
+	SrcTag() reflect.StructTag
+	DestTag() reflect.StructTag
+
+	// Flags returns the flags with which the conversion was started.
+	Flags() FieldMatchingFlags
+
+	// Meta returns any information originally passed to Convert.
+	Meta() *Meta
+}
+
+// FieldMappingFunc can convert an input field value into different values, depending on
+// the value of the source or destination struct tags.
+type FieldMappingFunc func(key string, sourceTag, destTag reflect.StructTag) (source string, dest string)
+
+func NewConversionFuncs() ConversionFuncs {
+	return ConversionFuncs{fns: make(map[typePair]reflect.Value)}
+}
+
+type ConversionFuncs struct {
+	fns map[typePair]reflect.Value
+}
+
+// Add adds the provided conversion functions to the lookup table - they must have the signature
+// `func(type1, type2, Scope) error`. Functions are added in the order passed and will override
+// previously registered pairs.
+func (c ConversionFuncs) Add(fns ...interface{}) error {
+	for _, fn := range fns {
+		fv := reflect.ValueOf(fn)
+		ft := fv.Type()
+		if err := verifyConversionFunctionSignature(ft); err != nil {
+			return err
+		}
+		c.fns[typePair{ft.In(0).Elem(), ft.In(1).Elem()}] = fv
+	}
+	return nil
+}
+
+// Merge returns a new ConversionFuncs that contains all conversions from
+// both other and c, with other conversions taking precedence.
+func (c ConversionFuncs) Merge(other ConversionFuncs) ConversionFuncs {
+	merged := NewConversionFuncs()
+	for k, v := range c.fns {
+		merged.fns[k] = v
+	}
+	for k, v := range other.fns {
+		merged.fns[k] = v
+	}
+	return merged
+}
+
+// Meta is supplied by Scheme, when it calls Convert.
+type Meta struct {
+	// KeyNameMapping is an optional function which may map the listed key (field name)
+	// into a source and destination value.
+	KeyNameMapping FieldMappingFunc
+	// Context is an optional field that callers may use to pass info to conversion functions.
+	Context interface{}
+}
+
+// scope contains information about an ongoing conversion.
+type scope struct {
+	converter *Converter
+	meta      *Meta
+	flags     FieldMatchingFlags
+
+	// srcStack & destStack are separate because they may not have a 1:1
+	// relationship.
+	srcStack  scopeStack
+	destStack scopeStack
+}
+
+type scopeStackElem struct {
+	tag   reflect.StructTag
+	value reflect.Value
+	key   string
+}
+
+type scopeStack []scopeStackElem
+
+func (s *scopeStack) pop() {
+	n := len(*s)
+	*s = (*s)[:n-1]
+}
+
+func (s *scopeStack) push(e scopeStackElem) {
+	*s = append(*s, e)
+}
+
+func (s *scopeStack) top() *scopeStackElem {
+	return &(*s)[len(*s)-1]
+}
+
+func (s scopeStack) describe() string {
+	desc := ""
+	if len(s) > 1 {
+		desc = "(" + s[1].value.Type().String() + ")"
+	}
+	for i, v := range s {
+		if i < 2 {
+			// First layer on stack is not real; second is handled specially above.
+			continue
+		}
+		if v.key == "" {
+			desc += fmt.Sprintf(".%v", v.value.Type())
+		} else {
+			desc += fmt.Sprintf(".%v", v.key)
+		}
+	}
+	return desc
+}
+
+// Formats src & dest as indices for printing.
+func (s *scope) setIndices(src, dest int) {
+	s.srcStack.top().key = fmt.Sprintf("[%v]", src)
+	s.destStack.top().key = fmt.Sprintf("[%v]", dest)
+}
+
+// Formats src & dest as map keys for printing.
+func (s *scope) setKeys(src, dest interface{}) {
+	s.srcStack.top().key = fmt.Sprintf(`["%v"]`, src)
+	s.destStack.top().key = fmt.Sprintf(`["%v"]`, dest)
+}
+
+// Convert continues a conversion.
+func (s *scope) Convert(src, dest interface{}, flags FieldMatchingFlags) error {
+	return s.converter.Convert(src, dest, flags, s.meta)
+}
+
+// DefaultConvert continues a conversion, performing a default conversion (no conversion func)
+// for the current stack frame.
+func (s *scope) DefaultConvert(src, dest interface{}, flags FieldMatchingFlags) error {
+	return s.converter.DefaultConvert(src, dest, flags, s.meta)
+}
+
+// SrcTag returns the tag of the struct containing the current source item, if any.
+func (s *scope) SrcTag() reflect.StructTag {
+	return s.srcStack.top().tag
+}
+
+// DestTag returns the tag of the struct containing the current dest item, if any.
+func (s *scope) DestTag() reflect.StructTag {
+	return s.destStack.top().tag
+}
+
+// Flags returns the flags with which the current conversion was started.
+func (s *scope) Flags() FieldMatchingFlags {
+	return s.flags
+}
+
+// Meta returns the meta object that was originally passed to Convert.
+func (s *scope) Meta() *Meta {
+	return s.meta
+}
+
+// describe prints the path to get to the current (source, dest) values.
+func (s *scope) describe() (src, dest string) {
+	return s.srcStack.describe(), s.destStack.describe()
+}
+
+// error makes an error that includes information about where we were in the objects
+// we were asked to convert.
+func (s *scope) errorf(message string, args ...interface{}) error {
+	srcPath, destPath := s.describe()
+	where := fmt.Sprintf("converting %v to %v: ", srcPath, destPath)
+	return fmt.Errorf(where+message, args...)
+}
+
+// Verifies whether a conversion function has a correct signature.
+func verifyConversionFunctionSignature(ft reflect.Type) error {
+	if ft.Kind() != reflect.Func {
+		return fmt.Errorf("expected func, got: %v", ft)
+	}
+	if ft.NumIn() != 3 {
+		return fmt.Errorf("expected three 'in' params, got: %v", ft)
+	}
+	if ft.NumOut() != 1 {
+		return fmt.Errorf("expected one 'out' param, got: %v", ft)
+	}
+	if ft.In(0).Kind() != reflect.Ptr {
+		return fmt.Errorf("expected pointer arg for 'in' param 0, got: %v", ft)
+	}
+	if ft.In(1).Kind() != reflect.Ptr {
+		return fmt.Errorf("expected pointer arg for 'in' param 1, got: %v", ft)
+	}
+	scopeType := Scope(nil)
+	if e, a := reflect.TypeOf(&scopeType).Elem(), ft.In(2); e != a {
+		return fmt.Errorf("expected '%v' arg for 'in' param 2, got '%v' (%v)", e, a, ft)
+	}
+	var forErrorType error
+	// This convolution is necessary, otherwise TypeOf picks up on the fact
+	// that forErrorType is nil.
+	errorType := reflect.TypeOf(&forErrorType).Elem()
+	if ft.Out(0) != errorType {
+		return fmt.Errorf("expected error return, got: %v", ft)
+	}
+	return nil
+}
+
+// RegisterConversionFunc registers a conversion func with the
+// Converter. conversionFunc must take three parameters: a pointer to the input
+// type, a pointer to the output type, and a conversion.Scope (which should be
+// used if recursive conversion calls are desired).  It must return an error.
+//
+// Example:
+// c.RegisterConversionFunc(
+//         func(in *Pod, out *v1.Pod, s Scope) error {
+//                 // conversion logic...
+//                 return nil
+//          })
+func (c *Converter) RegisterConversionFunc(conversionFunc interface{}) error {
+	return c.conversionFuncs.Add(conversionFunc)
+}
+
+// Similar to RegisterConversionFunc, but registers conversion function that were
+// automatically generated.
+func (c *Converter) RegisterGeneratedConversionFunc(conversionFunc interface{}) error {
+	return c.generatedConversionFuncs.Add(conversionFunc)
+}
+
+// RegisterIgnoredConversion registers a "no-op" for conversion, where any requested
+// conversion between from and to is ignored.
+func (c *Converter) RegisterIgnoredConversion(from, to interface{}) error {
+	typeFrom := reflect.TypeOf(from)
+	typeTo := reflect.TypeOf(to)
+	if reflect.TypeOf(from).Kind() != reflect.Ptr {
+		return fmt.Errorf("expected pointer arg for 'from' param 0, got: %v", typeFrom)
+	}
+	if typeTo.Kind() != reflect.Ptr {
+		return fmt.Errorf("expected pointer arg for 'to' param 1, got: %v", typeTo)
+	}
+	c.ignoredConversions[typePair{typeFrom.Elem(), typeTo.Elem()}] = struct{}{}
+	return nil
+}
+
+// IsConversionIgnored returns true if the specified objects should be dropped during
+// conversion.
+func (c *Converter) IsConversionIgnored(inType, outType reflect.Type) bool {
+	_, found := c.ignoredConversions[typePair{inType, outType}]
+	return found
+}
+
+func (c *Converter) HasConversionFunc(inType, outType reflect.Type) bool {
+	_, found := c.conversionFuncs.fns[typePair{inType, outType}]
+	return found
+}
+
+func (c *Converter) ConversionFuncValue(inType, outType reflect.Type) (reflect.Value, bool) {
+	value, found := c.conversionFuncs.fns[typePair{inType, outType}]
+	return value, found
+}
+
+// SetStructFieldCopy registers a correspondence. Whenever a struct field is encountered
+// which has a type and name matching srcFieldType and srcFieldName, it wil be copied
+// into the field in the destination struct matching destFieldType & Name, if such a
+// field exists.
+// May be called multiple times, even for the same source field & type--all applicable
+// copies will be performed.
+func (c *Converter) SetStructFieldCopy(srcFieldType interface{}, srcFieldName string, destFieldType interface{}, destFieldName string) error {
+	st := reflect.TypeOf(srcFieldType)
+	dt := reflect.TypeOf(destFieldType)
+	srcKey := typeNamePair{st, srcFieldName}
+	destKey := typeNamePair{dt, destFieldName}
+	c.structFieldDests[srcKey] = append(c.structFieldDests[srcKey], destKey)
+	c.structFieldSources[destKey] = append(c.structFieldSources[destKey], srcKey)
+	return nil
+}
+
+// RegisterInputDefaults registers a field name mapping function, used when converting
+// from maps to structs. Inputs to the conversion methods are checked for this type and a mapping
+// applied automatically if the input matches in. A set of default flags for the input conversion
+// may also be provided, which will be used when no explicit flags are requested.
+func (c *Converter) RegisterInputDefaults(in interface{}, fn FieldMappingFunc, defaultFlags FieldMatchingFlags) error {
+	fv := reflect.ValueOf(in)
+	ft := fv.Type()
+	if ft.Kind() != reflect.Ptr {
+		return fmt.Errorf("expected pointer 'in' argument, got: %v", ft)
+	}
+	c.inputFieldMappingFuncs[ft] = fn
+	c.inputDefaultFlags[ft] = defaultFlags
+	return nil
+}
+
+// FieldMatchingFlags contains a list of ways in which struct fields could be
+// copied. These constants may be | combined.
+type FieldMatchingFlags int
+
+const (
+	// Loop through destination fields, search for matching source
+	// field to copy it from. Source fields with no corresponding
+	// destination field will be ignored. If SourceToDest is
+	// specified, this flag is ignored. If neither is specified,
+	// or no flags are passed, this flag is the default.
+	DestFromSource FieldMatchingFlags = 0
+	// Loop through source fields, search for matching dest field
+	// to copy it into. Destination fields with no corresponding
+	// source field will be ignored.
+	SourceToDest FieldMatchingFlags = 1 << iota
+	// Don't treat it as an error if the corresponding source or
+	// dest field can't be found.
+	IgnoreMissingFields
+	// Don't require type names to match.
+	AllowDifferentFieldTypeNames
+)
+
+// IsSet returns true if the given flag or combination of flags is set.
+func (f FieldMatchingFlags) IsSet(flag FieldMatchingFlags) bool {
+	if flag == DestFromSource {
+		// The bit logic doesn't work on the default value.
+		return f&SourceToDest != SourceToDest
+	}
+	return f&flag == flag
+}
+
+// Convert will translate src to dest if it knows how. Both must be pointers.
+// If no conversion func is registered and the default copying mechanism
+// doesn't work on this type pair, an error will be returned.
+// Read the comments on the various FieldMatchingFlags constants to understand
+// what the 'flags' parameter does.
+// 'meta' is given to allow you to pass information to conversion functions,
+// it is not used by Convert() other than storing it in the scope.
+// Not safe for objects with cyclic references!
+func (c *Converter) Convert(src, dest interface{}, flags FieldMatchingFlags, meta *Meta) error {
+	if len(c.genericConversions) > 0 {
+		// TODO: avoid scope allocation
+		s := &scope{converter: c, flags: flags, meta: meta}
+		for _, fn := range c.genericConversions {
+			if ok, err := fn(src, dest, s); ok {
+				return err
+			}
+		}
+	}
+	return c.doConversion(src, dest, flags, meta, c.convert)
+}
+
+// DefaultConvert will translate src to dest if it knows how. Both must be pointers.
+// No conversion func is used. If the default copying mechanism
+// doesn't work on this type pair, an error will be returned.
+// Read the comments on the various FieldMatchingFlags constants to understand
+// what the 'flags' parameter does.
+// 'meta' is given to allow you to pass information to conversion functions,
+// it is not used by DefaultConvert() other than storing it in the scope.
+// Not safe for objects with cyclic references!
+func (c *Converter) DefaultConvert(src, dest interface{}, flags FieldMatchingFlags, meta *Meta) error {
+	return c.doConversion(src, dest, flags, meta, c.defaultConvert)
+}
+
+type conversionFunc func(sv, dv reflect.Value, scope *scope) error
+
+func (c *Converter) doConversion(src, dest interface{}, flags FieldMatchingFlags, meta *Meta, f conversionFunc) error {
+	dv, err := EnforcePtr(dest)
+	if err != nil {
+		return err
+	}
+	if !dv.CanAddr() && !dv.CanSet() {
+		return fmt.Errorf("can't write to dest")
+	}
+	sv, err := EnforcePtr(src)
+	if err != nil {
+		return err
+	}
+	s := &scope{
+		converter: c,
+		flags:     flags,
+		meta:      meta,
+	}
+	// Leave something on the stack, so that calls to struct tag getters never fail.
+	s.srcStack.push(scopeStackElem{})
+	s.destStack.push(scopeStackElem{})
+	return f(sv, dv, s)
+}
+
+// callCustom calls 'custom' with sv & dv. custom must be a conversion function.
+func (c *Converter) callCustom(sv, dv, custom reflect.Value, scope *scope) error {
+	if !sv.CanAddr() {
+		sv2 := reflect.New(sv.Type())
+		sv2.Elem().Set(sv)
+		sv = sv2
+	} else {
+		sv = sv.Addr()
+	}
+	if !dv.CanAddr() {
+		if !dv.CanSet() {
+			return scope.errorf("can't addr or set dest.")
+		}
+		dvOrig := dv
+		dv := reflect.New(dvOrig.Type())
+		defer func() { dvOrig.Set(dv) }()
+	} else {
+		dv = dv.Addr()
+	}
+	args := []reflect.Value{sv, dv, reflect.ValueOf(scope)}
+	ret := custom.Call(args)[0].Interface()
+	// This convolution is necessary because nil interfaces won't convert
+	// to errors.
+	if ret == nil {
+		return nil
+	}
+	return ret.(error)
+}
+
+// convert recursively copies sv into dv, calling an appropriate conversion function if
+// one is registered.
+func (c *Converter) convert(sv, dv reflect.Value, scope *scope) error {
+	dt, st := dv.Type(), sv.Type()
+	pair := typePair{st, dt}
+
+	// ignore conversions of this type
+	if _, ok := c.ignoredConversions[pair]; ok {
+		if c.Debug != nil {
+			c.Debug.Logf("Ignoring conversion of '%v' to '%v'", st, dt)
+		}
+		return nil
+	}
+
+	// Convert sv to dv.
+	if fv, ok := c.conversionFuncs.fns[pair]; ok {
+		if c.Debug != nil {
+			c.Debug.Logf("Calling custom conversion of '%v' to '%v'", st, dt)
+		}
+		return c.callCustom(sv, dv, fv, scope)
+	}
+	if fv, ok := c.generatedConversionFuncs.fns[pair]; ok {
+		if c.Debug != nil {
+			c.Debug.Logf("Calling generated conversion of '%v' to '%v'", st, dt)
+		}
+		return c.callCustom(sv, dv, fv, scope)
+	}
+
+	return c.defaultConvert(sv, dv, scope)
+}
+
+// defaultConvert recursively copies sv into dv. no conversion function is called
+// for the current stack frame (but conversion functions may be called for nested objects)
+func (c *Converter) defaultConvert(sv, dv reflect.Value, scope *scope) error {
+	dt, st := dv.Type(), sv.Type()
+
+	if !dv.CanSet() {
+		return scope.errorf("Cannot set dest. (Tried to deep copy something with unexported fields?)")
+	}
+
+	if !scope.flags.IsSet(AllowDifferentFieldTypeNames) && c.nameFunc(dt) != c.nameFunc(st) {
+		return scope.errorf(
+			"type names don't match (%v, %v), and no conversion 'func (%v, %v) error' registered.",
+			c.nameFunc(st), c.nameFunc(dt), st, dt)
+	}
+
+	switch st.Kind() {
+	case reflect.Map, reflect.Ptr, reflect.Slice, reflect.Interface, reflect.Struct:
+		// Don't copy these via assignment/conversion!
+	default:
+		// This should handle all simple types.
+		if st.AssignableTo(dt) {
+			dv.Set(sv)
+			return nil
+		}
+		if st.ConvertibleTo(dt) {
+			dv.Set(sv.Convert(dt))
+			return nil
+		}
+	}
+
+	if c.Debug != nil {
+		c.Debug.Logf("Trying to convert '%v' to '%v'", st, dt)
+	}
+
+	scope.srcStack.push(scopeStackElem{value: sv})
+	scope.destStack.push(scopeStackElem{value: dv})
+	defer scope.srcStack.pop()
+	defer scope.destStack.pop()
+
+	switch dv.Kind() {
+	case reflect.Struct:
+		return c.convertKV(toKVValue(sv), toKVValue(dv), scope)
+	case reflect.Slice:
+		if sv.IsNil() {
+			// Don't make a zero-length slice.
+			dv.Set(reflect.Zero(dt))
+			return nil
+		}
+		dv.Set(reflect.MakeSlice(dt, sv.Len(), sv.Cap()))
+		for i := 0; i < sv.Len(); i++ {
+			scope.setIndices(i, i)
+			if err := c.convert(sv.Index(i), dv.Index(i), scope); err != nil {
+				return err
+			}
+		}
+	case reflect.Ptr:
+		if sv.IsNil() {
+			// Don't copy a nil ptr!
+			dv.Set(reflect.Zero(dt))
+			return nil
+		}
+		dv.Set(reflect.New(dt.Elem()))
+		switch st.Kind() {
+		case reflect.Ptr, reflect.Interface:
+			return c.convert(sv.Elem(), dv.Elem(), scope)
+		default:
+			return c.convert(sv, dv.Elem(), scope)
+		}
+	case reflect.Map:
+		if sv.IsNil() {
+			// Don't copy a nil ptr!
+			dv.Set(reflect.Zero(dt))
+			return nil
+		}
+		dv.Set(reflect.MakeMap(dt))
+		for _, sk := range sv.MapKeys() {
+			dk := reflect.New(dt.Key()).Elem()
+			if err := c.convert(sk, dk, scope); err != nil {
+				return err
+			}
+			dkv := reflect.New(dt.Elem()).Elem()
+			scope.setKeys(sk.Interface(), dk.Interface())
+			// TODO:  sv.MapIndex(sk) may return a value with CanAddr() == false,
+			// because a map[string]struct{} does not allow a pointer reference.
+			// Calling a custom conversion function defined for the map value
+			// will panic. Example is PodInfo map[string]ContainerStatus.
+			if err := c.convert(sv.MapIndex(sk), dkv, scope); err != nil {
+				return err
+			}
+			dv.SetMapIndex(dk, dkv)
+		}
+	case reflect.Interface:
+		if sv.IsNil() {
+			// Don't copy a nil interface!
+			dv.Set(reflect.Zero(dt))
+			return nil
+		}
+		tmpdv := reflect.New(sv.Elem().Type()).Elem()
+		if err := c.convert(sv.Elem(), tmpdv, scope); err != nil {
+			return err
+		}
+		dv.Set(reflect.ValueOf(tmpdv.Interface()))
+		return nil
+	default:
+		return scope.errorf("couldn't copy '%v' into '%v'; didn't understand types", st, dt)
+	}
+	return nil
+}
+
+var stringType = reflect.TypeOf("")
+
+func toKVValue(v reflect.Value) kvValue {
+	switch v.Kind() {
+	case reflect.Struct:
+		return structAdaptor(v)
+	case reflect.Map:
+		if v.Type().Key().AssignableTo(stringType) {
+			return stringMapAdaptor(v)
+		}
+	}
+
+	return nil
+}
+
+// kvValue lets us write the same conversion logic to work with both maps
+// and structs. Only maps with string keys make sense for this.
+type kvValue interface {
+	// returns all keys, as a []string.
+	keys() []string
+	// Will just return "" for maps.
+	tagOf(key string) reflect.StructTag
+	// Will return the zero Value if the key doesn't exist.
+	value(key string) reflect.Value
+	// Maps require explicit setting-- will do nothing for structs.
+	// Returns false on failure.
+	confirmSet(key string, v reflect.Value) bool
+}
+
+type stringMapAdaptor reflect.Value
+
+func (a stringMapAdaptor) len() int {
+	return reflect.Value(a).Len()
+}
+
+func (a stringMapAdaptor) keys() []string {
+	v := reflect.Value(a)
+	keys := make([]string, v.Len())
+	for i, v := range v.MapKeys() {
+		if v.IsNil() {
+			continue
+		}
+		switch t := v.Interface().(type) {
+		case string:
+			keys[i] = t
+		}
+	}
+	return keys
+}
+
+func (a stringMapAdaptor) tagOf(key string) reflect.StructTag {
+	return ""
+}
+
+func (a stringMapAdaptor) value(key string) reflect.Value {
+	return reflect.Value(a).MapIndex(reflect.ValueOf(key))
+}
+
+func (a stringMapAdaptor) confirmSet(key string, v reflect.Value) bool {
+	return true
+}
+
+type structAdaptor reflect.Value
+
+func (a structAdaptor) len() int {
+	v := reflect.Value(a)
+	return v.Type().NumField()
+}
+
+func (a structAdaptor) keys() []string {
+	v := reflect.Value(a)
+	t := v.Type()
+	keys := make([]string, t.NumField())
+	for i := range keys {
+		keys[i] = t.Field(i).Name
+	}
+	return keys
+}
+
+func (a structAdaptor) tagOf(key string) reflect.StructTag {
+	v := reflect.Value(a)
+	field, ok := v.Type().FieldByName(key)
+	if ok {
+		return field.Tag
+	}
+	return ""
+}
+
+func (a structAdaptor) value(key string) reflect.Value {
+	v := reflect.Value(a)
+	return v.FieldByName(key)
+}
+
+func (a structAdaptor) confirmSet(key string, v reflect.Value) bool {
+	return true
+}
+
+// convertKV can convert things that consist of key/value pairs, like structs
+// and some maps.
+func (c *Converter) convertKV(skv, dkv kvValue, scope *scope) error {
+	if skv == nil || dkv == nil {
+		// TODO: add keys to stack to support really understandable error messages.
+		return fmt.Errorf("Unable to convert %#v to %#v", skv, dkv)
+	}
+
+	lister := dkv
+	if scope.flags.IsSet(SourceToDest) {
+		lister = skv
+	}
+
+	var mapping FieldMappingFunc
+	if scope.meta != nil && scope.meta.KeyNameMapping != nil {
+		mapping = scope.meta.KeyNameMapping
+	}
+
+	for _, key := range lister.keys() {
+		if found, err := c.checkField(key, skv, dkv, scope); found {
+			if err != nil {
+				return err
+			}
+			continue
+		}
+		stag := skv.tagOf(key)
+		dtag := dkv.tagOf(key)
+		skey := key
+		dkey := key
+		if mapping != nil {
+			skey, dkey = scope.meta.KeyNameMapping(key, stag, dtag)
+		}
+
+		df := dkv.value(dkey)
+		sf := skv.value(skey)
+		if !df.IsValid() || !sf.IsValid() {
+			switch {
+			case scope.flags.IsSet(IgnoreMissingFields):
+				// No error.
+			case scope.flags.IsSet(SourceToDest):
+				return scope.errorf("%v not present in dest", dkey)
+			default:
+				return scope.errorf("%v not present in src", skey)
+			}
+			continue
+		}
+		scope.srcStack.top().key = skey
+		scope.srcStack.top().tag = stag
+		scope.destStack.top().key = dkey
+		scope.destStack.top().tag = dtag
+		if err := c.convert(sf, df, scope); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// checkField returns true if the field name matches any of the struct
+// field copying rules. The error should be ignored if it returns false.
+func (c *Converter) checkField(fieldName string, skv, dkv kvValue, scope *scope) (bool, error) {
+	replacementMade := false
+	if scope.flags.IsSet(DestFromSource) {
+		df := dkv.value(fieldName)
+		if !df.IsValid() {
+			return false, nil
+		}
+		destKey := typeNamePair{df.Type(), fieldName}
+		// Check each of the potential source (type, name) pairs to see if they're
+		// present in sv.
+		for _, potentialSourceKey := range c.structFieldSources[destKey] {
+			sf := skv.value(potentialSourceKey.fieldName)
+			if !sf.IsValid() {
+				continue
+			}
+			if sf.Type() == potentialSourceKey.fieldType {
+				// Both the source's name and type matched, so copy.
+				scope.srcStack.top().key = potentialSourceKey.fieldName
+				scope.destStack.top().key = fieldName
+				if err := c.convert(sf, df, scope); err != nil {
+					return true, err
+				}
+				dkv.confirmSet(fieldName, df)
+				replacementMade = true
+			}
+		}
+		return replacementMade, nil
+	}
+
+	sf := skv.value(fieldName)
+	if !sf.IsValid() {
+		return false, nil
+	}
+	srcKey := typeNamePair{sf.Type(), fieldName}
+	// Check each of the potential dest (type, name) pairs to see if they're
+	// present in dv.
+	for _, potentialDestKey := range c.structFieldDests[srcKey] {
+		df := dkv.value(potentialDestKey.fieldName)
+		if !df.IsValid() {
+			continue
+		}
+		if df.Type() == potentialDestKey.fieldType {
+			// Both the dest's name and type matched, so copy.
+			scope.srcStack.top().key = fieldName
+			scope.destStack.top().key = potentialDestKey.fieldName
+			if err := c.convert(sf, df, scope); err != nil {
+				return true, err
+			}
+			dkv.confirmSet(potentialDestKey.fieldName, df)
+			replacementMade = true
+		}
+	}
+	return replacementMade, nil
+}

vendor/k8s.io/apimachinery/pkg/conversion/deep_equal.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2015 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 conversion
+
+import (
+	"k8s.io/apimachinery/third_party/forked/golang/reflect"
+)
+
+// The code for this type must be located in third_party, since it forks from
+// go std lib. But for convenience, we expose the type here, too.
+type Equalities struct {
+	reflect.Equalities
+}
+
+// For convenience, panics on errors
+func EqualitiesOrDie(funcs ...interface{}) Equalities {
+	e := Equalities{reflect.Equalities{}}
+	if err := e.AddFuncs(funcs...); err != nil {
+		panic(err)
+	}
+	return e
+}

vendor/k8s.io/apimachinery/pkg/conversion/doc.go

@@ -0,0 +1,24 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package conversion provides go object versioning.
+//
+// Specifically, conversion provides a way for you to define multiple versions
+// of the same object. You may write functions which implement conversion logic,
+// but for the fields which did not change, copying is automated. This makes it
+// easy to modify the structures you use in memory without affecting the format
+// you store on disk or respond to in your external API calls.
+package conversion // import "k8s.io/apimachinery/pkg/conversion"

vendor/k8s.io/apimachinery/pkg/conversion/helper.go

@@ -0,0 +1,39 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package conversion
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// EnforcePtr ensures that obj is a pointer of some sort. Returns a reflect.Value
+// of the dereferenced pointer, ensuring that it is settable/addressable.
+// Returns an error if this is not possible.
+func EnforcePtr(obj interface{}) (reflect.Value, error) {
+	v := reflect.ValueOf(obj)
+	if v.Kind() != reflect.Ptr {
+		if v.Kind() == reflect.Invalid {
+			return reflect.Value{}, fmt.Errorf("expected pointer, but got invalid kind")
+		}
+		return reflect.Value{}, fmt.Errorf("expected pointer, but got %v type", v.Type())
+	}
+	if v.IsNil() {
+		return reflect.Value{}, fmt.Errorf("expected pointer, but got nil")
+	}
+	return v.Elem(), nil
+}

vendor/k8s.io/apimachinery/pkg/conversion/queryparams/convert.go

@@ -0,0 +1,188 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package queryparams
+
+import (
+	"fmt"
+	"net/url"
+	"reflect"
+	"strings"
+)
+
+// Marshaler converts an object to a query parameter string representation
+type Marshaler interface {
+	MarshalQueryParameter() (string, error)
+}
+
+// Unmarshaler converts a string representation to an object
+type Unmarshaler interface {
+	UnmarshalQueryParameter(string) error
+}
+
+func jsonTag(field reflect.StructField) (string, bool) {
+	structTag := field.Tag.Get("json")
+	if len(structTag) == 0 {
+		return "", false
+	}
+	parts := strings.Split(structTag, ",")
+	tag := parts[0]
+	if tag == "-" {
+		tag = ""
+	}
+	omitempty := false
+	parts = parts[1:]
+	for _, part := range parts {
+		if part == "omitempty" {
+			omitempty = true
+			break
+		}
+	}
+	return tag, omitempty
+}
+
+func formatValue(value interface{}) string {
+	return fmt.Sprintf("%v", value)
+}
+
+func isPointerKind(kind reflect.Kind) bool {
+	return kind == reflect.Ptr
+}
+
+func isStructKind(kind reflect.Kind) bool {
+	return kind == reflect.Struct
+}
+
+func isValueKind(kind reflect.Kind) bool {
+	switch kind {
+	case reflect.String, reflect.Bool, reflect.Int, reflect.Int8, reflect.Int16,
+		reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8,
+		reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Float32,
+		reflect.Float64, reflect.Complex64, reflect.Complex128:
+		return true
+	default:
+		return false
+	}
+}
+
+func zeroValue(value reflect.Value) bool {
+	return reflect.DeepEqual(reflect.Zero(value.Type()).Interface(), value.Interface())
+}
+
+func customMarshalValue(value reflect.Value) (reflect.Value, bool) {
+	// Return unless we implement a custom query marshaler
+	if !value.CanInterface() {
+		return reflect.Value{}, false
+	}
+
+	marshaler, ok := value.Interface().(Marshaler)
+	if !ok {
+		return reflect.Value{}, false
+	}
+
+	// Don't invoke functions on nil pointers
+	// If the type implements MarshalQueryParameter, AND the tag is not omitempty, AND the value is a nil pointer, "" seems like a reasonable response
+	if isPointerKind(value.Kind()) && zeroValue(value) {
+		return reflect.ValueOf(""), true
+	}
+
+	// Get the custom marshalled value
+	v, err := marshaler.MarshalQueryParameter()
+	if err != nil {
+		return reflect.Value{}, false
+	}
+	return reflect.ValueOf(v), true
+}
+
+func addParam(values url.Values, tag string, omitempty bool, value reflect.Value) {
+	if omitempty && zeroValue(value) {
+		return
+	}
+	val := ""
+	iValue := fmt.Sprintf("%v", value.Interface())
+
+	if iValue != "<nil>" {
+		val = iValue
+	}
+	values.Add(tag, val)
+}
+
+func addListOfParams(values url.Values, tag string, omitempty bool, list reflect.Value) {
+	for i := 0; i < list.Len(); i++ {
+		addParam(values, tag, omitempty, list.Index(i))
+	}
+}
+
+// Convert takes an object and converts it to a url.Values object using JSON tags as
+// parameter names. Only top-level simple values, arrays, and slices are serialized.
+// Embedded structs, maps, etc. will not be serialized.
+func Convert(obj interface{}) (url.Values, error) {
+	result := url.Values{}
+	if obj == nil {
+		return result, nil
+	}
+	var sv reflect.Value
+	switch reflect.TypeOf(obj).Kind() {
+	case reflect.Ptr, reflect.Interface:
+		sv = reflect.ValueOf(obj).Elem()
+	default:
+		return nil, fmt.Errorf("expecting a pointer or interface")
+	}
+	st := sv.Type()
+	if !isStructKind(st.Kind()) {
+		return nil, fmt.Errorf("expecting a pointer to a struct")
+	}
+
+	// Check all object fields
+	convertStruct(result, st, sv)
+
+	return result, nil
+}
+
+func convertStruct(result url.Values, st reflect.Type, sv reflect.Value) {
+	for i := 0; i < st.NumField(); i++ {
+		field := sv.Field(i)
+		tag, omitempty := jsonTag(st.Field(i))
+		if len(tag) == 0 {
+			continue
+		}
+		ft := field.Type()
+
+		kind := ft.Kind()
+		if isPointerKind(kind) {
+			ft = ft.Elem()
+			kind = ft.Kind()
+			if !field.IsNil() {
+				field = reflect.Indirect(field)
+			}
+		}
+
+		switch {
+		case isValueKind(kind):
+			addParam(result, tag, omitempty, field)
+		case kind == reflect.Array || kind == reflect.Slice:
+			if isValueKind(ft.Elem().Kind()) {
+				addListOfParams(result, tag, omitempty, field)
+			}
+		case isStructKind(kind) && !(zeroValue(field) && omitempty):
+			if marshalValue, ok := customMarshalValue(field); ok {
+				addParam(result, tag, omitempty, marshalValue)
+			} else {
+				convertStruct(result, ft, field)
+			}
+		}
+	}
+}

vendor/k8s.io/apimachinery/pkg/conversion/queryparams/doc.go

@@ -0,0 +1,19 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package queryparams provides conversion from versioned
+// runtime objects to URL query values
+package queryparams // import "k8s.io/apimachinery/pkg/conversion/queryparams"

vendor/k8s.io/apimachinery/pkg/conversion/unstructured/converter.go

@@ -0,0 +1,738 @@
+/*
+Copyright 2017 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 unstructured
+
+import (
+	"bytes"
+	encodingjson "encoding/json"
+	"fmt"
+	"math"
+	"os"
+	"reflect"
+	"strconv"
+	"strings"
+	"sync"
+	"sync/atomic"
+
+	apiequality "k8s.io/apimachinery/pkg/api/equality"
+	"k8s.io/apimachinery/pkg/util/diff"
+	"k8s.io/apimachinery/pkg/util/json"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+
+	"github.com/golang/glog"
+)
+
+// Converter is an interface for converting between interface{}
+// and map[string]interface representation.
+type Converter interface {
+	ToUnstructured(obj interface{}) (map[string]interface{}, error)
+	FromUnstructured(u map[string]interface{}, obj interface{}) error
+}
+
+type structField struct {
+	structType reflect.Type
+	field      int
+}
+
+type fieldInfo struct {
+	name      string
+	nameValue reflect.Value
+	omitempty bool
+}
+
+type fieldsCacheMap map[structField]*fieldInfo
+
+type fieldsCache struct {
+	sync.Mutex
+	value atomic.Value
+}
+
+func newFieldsCache() *fieldsCache {
+	cache := &fieldsCache{}
+	cache.value.Store(make(fieldsCacheMap))
+	return cache
+}
+
+var (
+	marshalerType          = reflect.TypeOf(new(encodingjson.Marshaler)).Elem()
+	unmarshalerType        = reflect.TypeOf(new(encodingjson.Unmarshaler)).Elem()
+	mapStringInterfaceType = reflect.TypeOf(map[string]interface{}{})
+	stringType             = reflect.TypeOf(string(""))
+	int64Type              = reflect.TypeOf(int64(0))
+	uint64Type             = reflect.TypeOf(uint64(0))
+	float64Type            = reflect.TypeOf(float64(0))
+	boolType               = reflect.TypeOf(bool(false))
+	fieldCache             = newFieldsCache()
+	DefaultConverter       = NewConverter(parseBool(os.Getenv("KUBE_PATCH_CONVERSION_DETECTOR")))
+)
+
+func parseBool(key string) bool {
+	if len(key) == 0 {
+		return false
+	}
+	value, err := strconv.ParseBool(key)
+	if err != nil {
+		utilruntime.HandleError(fmt.Errorf("Couldn't parse '%s' as bool for unstructured mismatch detection", key))
+	}
+	return value
+}
+
+// ConverterImpl knows how to convert between interface{} and
+// Unstructured in both ways.
+type converterImpl struct {
+	// If true, we will be additionally running conversion via json
+	// to ensure that the result is true.
+	// This is supposed to be set only in tests.
+	mismatchDetection bool
+}
+
+func NewConverter(mismatchDetection bool) Converter {
+	return &converterImpl{
+		mismatchDetection: mismatchDetection,
+	}
+}
+
+func (c *converterImpl) FromUnstructured(u map[string]interface{}, obj interface{}) error {
+	t := reflect.TypeOf(obj)
+	value := reflect.ValueOf(obj)
+	if t.Kind() != reflect.Ptr || value.IsNil() {
+		return fmt.Errorf("FromUnstructured requires a non-nil pointer to an object, got %v", t)
+	}
+	err := fromUnstructured(reflect.ValueOf(u), value.Elem())
+	if c.mismatchDetection {
+		newObj := reflect.New(t.Elem()).Interface()
+		newErr := fromUnstructuredViaJSON(u, newObj)
+		if (err != nil) != (newErr != nil) {
+			glog.Fatalf("FromUnstructured unexpected error for %v: error: %v", u, err)
+		}
+		if err == nil && !apiequality.Semantic.DeepEqual(obj, newObj) {
+			glog.Fatalf("FromUnstructured mismatch for %#v, diff: %v", obj, diff.ObjectReflectDiff(obj, newObj))
+		}
+	}
+	return err
+}
+
+func fromUnstructuredViaJSON(u map[string]interface{}, obj interface{}) error {
+	data, err := json.Marshal(u)
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(data, obj)
+}
+
+func fromUnstructured(sv, dv reflect.Value) error {
+	sv = unwrapInterface(sv)
+	if !sv.IsValid() {
+		dv.Set(reflect.Zero(dv.Type()))
+		return nil
+	}
+	st, dt := sv.Type(), dv.Type()
+
+	switch dt.Kind() {
+	case reflect.Map, reflect.Slice, reflect.Ptr, reflect.Struct, reflect.Interface:
+		// Those require non-trivial conversion.
+	default:
+		// This should handle all simple types.
+		if st.AssignableTo(dt) {
+			dv.Set(sv)
+			return nil
+		}
+		// We cannot simply use "ConvertibleTo", as JSON doesn't support conversions
+		// between those four groups: bools, integers, floats and string. We need to
+		// do the same.
+		if st.ConvertibleTo(dt) {
+			switch st.Kind() {
+			case reflect.String:
+				switch dt.Kind() {
+				case reflect.String:
+					dv.Set(sv.Convert(dt))
+					return nil
+				}
+			case reflect.Bool:
+				switch dt.Kind() {
+				case reflect.Bool:
+					dv.Set(sv.Convert(dt))
+					return nil
+				}
+			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+				reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+				switch dt.Kind() {
+				case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+					reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+					dv.Set(sv.Convert(dt))
+					return nil
+				}
+			case reflect.Float32, reflect.Float64:
+				switch dt.Kind() {
+				case reflect.Float32, reflect.Float64:
+					dv.Set(sv.Convert(dt))
+					return nil
+				}
+				if sv.Float() == math.Trunc(sv.Float()) {
+					dv.Set(sv.Convert(dt))
+					return nil
+				}
+			}
+			return fmt.Errorf("cannot convert %s to %s", st.String(), dt.String())
+		}
+	}
+
+	// Check if the object has a custom JSON marshaller/unmarshaller.
+	if reflect.PtrTo(dt).Implements(unmarshalerType) {
+		data, err := json.Marshal(sv.Interface())
+		if err != nil {
+			return fmt.Errorf("error encoding %s to json: %v", st.String(), err)
+		}
+		unmarshaler := dv.Addr().Interface().(encodingjson.Unmarshaler)
+		return unmarshaler.UnmarshalJSON(data)
+	}
+
+	switch dt.Kind() {
+	case reflect.Map:
+		return mapFromUnstructured(sv, dv)
+	case reflect.Slice:
+		return sliceFromUnstructured(sv, dv)
+	case reflect.Ptr:
+		return pointerFromUnstructured(sv, dv)
+	case reflect.Struct:
+		return structFromUnstructured(sv, dv)
+	case reflect.Interface:
+		return interfaceFromUnstructured(sv, dv)
+	default:
+		return fmt.Errorf("unrecognized type: %v", dt.Kind())
+	}
+}
+
+func fieldInfoFromField(structType reflect.Type, field int) *fieldInfo {
+	fieldCacheMap := fieldCache.value.Load().(fieldsCacheMap)
+	if info, ok := fieldCacheMap[structField{structType, field}]; ok {
+		return info
+	}
+
+	// Cache miss - we need to compute the field name.
+	info := &fieldInfo{}
+	typeField := structType.Field(field)
+	jsonTag := typeField.Tag.Get("json")
+	if len(jsonTag) == 0 {
+		// Make the first character lowercase.
+		if typeField.Name == "" {
+			info.name = typeField.Name
+		} else {
+			info.name = strings.ToLower(typeField.Name[:1]) + typeField.Name[1:]
+		}
+	} else {
+		items := strings.Split(jsonTag, ",")
+		info.name = items[0]
+		for i := range items {
+			if items[i] == "omitempty" {
+				info.omitempty = true
+			}
+		}
+	}
+	info.nameValue = reflect.ValueOf(info.name)
+
+	fieldCache.Lock()
+	defer fieldCache.Unlock()
+	fieldCacheMap = fieldCache.value.Load().(fieldsCacheMap)
+	newFieldCacheMap := make(fieldsCacheMap)
+	for k, v := range fieldCacheMap {
+		newFieldCacheMap[k] = v
+	}
+	newFieldCacheMap[structField{structType, field}] = info
+	fieldCache.value.Store(newFieldCacheMap)
+	return info
+}
+
+func unwrapInterface(v reflect.Value) reflect.Value {
+	for v.Kind() == reflect.Interface {
+		v = v.Elem()
+	}
+	return v
+}
+
+func mapFromUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if st.Kind() != reflect.Map {
+		return fmt.Errorf("cannot restore map from %v", st.Kind())
+	}
+
+	if !st.Key().AssignableTo(dt.Key()) && !st.Key().ConvertibleTo(dt.Key()) {
+		return fmt.Errorf("cannot copy map with non-assignable keys: %v %v", st.Key(), dt.Key())
+	}
+
+	if sv.IsNil() {
+		dv.Set(reflect.Zero(dt))
+		return nil
+	}
+	dv.Set(reflect.MakeMap(dt))
+	for _, key := range sv.MapKeys() {
+		value := reflect.New(dt.Elem()).Elem()
+		if val := unwrapInterface(sv.MapIndex(key)); val.IsValid() {
+			if err := fromUnstructured(val, value); err != nil {
+				return err
+			}
+		} else {
+			value.Set(reflect.Zero(dt.Elem()))
+		}
+		if st.Key().AssignableTo(dt.Key()) {
+			dv.SetMapIndex(key, value)
+		} else {
+			dv.SetMapIndex(key.Convert(dt.Key()), value)
+		}
+	}
+	return nil
+}
+
+func sliceFromUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if st.Kind() == reflect.String && dt.Elem().Kind() == reflect.Uint8 {
+		// We store original []byte representation as string.
+		// This conversion is allowed, but we need to be careful about
+		// marshaling data appropriately.
+		if len(sv.Interface().(string)) > 0 {
+			marshalled, err := json.Marshal(sv.Interface())
+			if err != nil {
+				return fmt.Errorf("error encoding %s to json: %v", st, err)
+			}
+			// TODO: Is this Unmarshal needed?
+			var data []byte
+			err = json.Unmarshal(marshalled, &data)
+			if err != nil {
+				return fmt.Errorf("error decoding from json: %v", err)
+			}
+			dv.SetBytes(data)
+		} else {
+			dv.Set(reflect.Zero(dt))
+		}
+		return nil
+	}
+	if st.Kind() != reflect.Slice {
+		return fmt.Errorf("cannot restore slice from %v", st.Kind())
+	}
+
+	if sv.IsNil() {
+		dv.Set(reflect.Zero(dt))
+		return nil
+	}
+	dv.Set(reflect.MakeSlice(dt, sv.Len(), sv.Cap()))
+	for i := 0; i < sv.Len(); i++ {
+		if err := fromUnstructured(sv.Index(i), dv.Index(i)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func pointerFromUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+
+	if st.Kind() == reflect.Ptr && sv.IsNil() {
+		dv.Set(reflect.Zero(dt))
+		return nil
+	}
+	dv.Set(reflect.New(dt.Elem()))
+	switch st.Kind() {
+	case reflect.Ptr, reflect.Interface:
+		return fromUnstructured(sv.Elem(), dv.Elem())
+	default:
+		return fromUnstructured(sv, dv.Elem())
+	}
+}
+
+func structFromUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if st.Kind() != reflect.Map {
+		return fmt.Errorf("cannot restore struct from: %v", st.Kind())
+	}
+
+	for i := 0; i < dt.NumField(); i++ {
+		fieldInfo := fieldInfoFromField(dt, i)
+		fv := dv.Field(i)
+
+		if len(fieldInfo.name) == 0 {
+			// This field is inlined.
+			if err := fromUnstructured(sv, fv); err != nil {
+				return err
+			}
+		} else {
+			value := unwrapInterface(sv.MapIndex(fieldInfo.nameValue))
+			if value.IsValid() {
+				if err := fromUnstructured(value, fv); err != nil {
+					return err
+				}
+			} else {
+				fv.Set(reflect.Zero(fv.Type()))
+			}
+		}
+	}
+	return nil
+}
+
+func interfaceFromUnstructured(sv, dv reflect.Value) error {
+	// TODO: Is this conversion safe?
+	dv.Set(sv)
+	return nil
+}
+
+func (c *converterImpl) ToUnstructured(obj interface{}) (map[string]interface{}, error) {
+	t := reflect.TypeOf(obj)
+	value := reflect.ValueOf(obj)
+	if t.Kind() != reflect.Ptr || value.IsNil() {
+		return nil, fmt.Errorf("ToUnstructured requires a non-nil pointer to an object, got %v", t)
+	}
+	u := &map[string]interface{}{}
+	err := toUnstructured(value.Elem(), reflect.ValueOf(u).Elem())
+	if c.mismatchDetection {
+		newUnstr := &map[string]interface{}{}
+		newErr := toUnstructuredViaJSON(obj, newUnstr)
+		if (err != nil) != (newErr != nil) {
+			glog.Fatalf("ToUnstructured unexpected error for %v: error: %v", obj, err)
+		}
+		if err == nil && !apiequality.Semantic.DeepEqual(u, newUnstr) {
+			glog.Fatalf("ToUnstructured mismatch for %#v, diff: %v", u, diff.ObjectReflectDiff(u, newUnstr))
+		}
+	}
+	if err != nil {
+		return nil, err
+	}
+	return *u, nil
+}
+
+func toUnstructuredViaJSON(obj interface{}, u *map[string]interface{}) error {
+	data, err := json.Marshal(obj)
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(data, u)
+}
+
+var (
+	nullBytes  = []byte("null")
+	trueBytes  = []byte("true")
+	falseBytes = []byte("false")
+)
+
+func getMarshaler(v reflect.Value) (encodingjson.Marshaler, bool) {
+	// Check value receivers if v is not a pointer and pointer receivers if v is a pointer
+	if v.Type().Implements(marshalerType) {
+		return v.Interface().(encodingjson.Marshaler), true
+	}
+	// Check pointer receivers if v is not a pointer
+	if v.Kind() != reflect.Ptr && v.CanAddr() {
+		v = v.Addr()
+		if v.Type().Implements(marshalerType) {
+			return v.Interface().(encodingjson.Marshaler), true
+		}
+	}
+	return nil, false
+}
+
+func toUnstructured(sv, dv reflect.Value) error {
+	// Check if the object has a custom JSON marshaller/unmarshaller.
+	if marshaler, ok := getMarshaler(sv); ok {
+		if sv.Kind() == reflect.Ptr && sv.IsNil() {
+			// We're done - we don't need to store anything.
+			return nil
+		}
+
+		data, err := marshaler.MarshalJSON()
+		if err != nil {
+			return err
+		}
+		switch {
+		case len(data) == 0:
+			return fmt.Errorf("error decoding from json: empty value")
+
+		case bytes.Equal(data, nullBytes):
+			// We're done - we don't need to store anything.
+
+		case bytes.Equal(data, trueBytes):
+			dv.Set(reflect.ValueOf(true))
+
+		case bytes.Equal(data, falseBytes):
+			dv.Set(reflect.ValueOf(false))
+
+		case data[0] == '"':
+			var result string
+			err := json.Unmarshal(data, &result)
+			if err != nil {
+				return fmt.Errorf("error decoding string from json: %v", err)
+			}
+			dv.Set(reflect.ValueOf(result))
+
+		case data[0] == '{':
+			result := make(map[string]interface{})
+			err := json.Unmarshal(data, &result)
+			if err != nil {
+				return fmt.Errorf("error decoding object from json: %v", err)
+			}
+			dv.Set(reflect.ValueOf(result))
+
+		case data[0] == '[':
+			result := make([]interface{}, 0)
+			err := json.Unmarshal(data, &result)
+			if err != nil {
+				return fmt.Errorf("error decoding array from json: %v", err)
+			}
+			dv.Set(reflect.ValueOf(result))
+
+		default:
+			var (
+				resultInt   int64
+				resultFloat float64
+				err         error
+			)
+			if err = json.Unmarshal(data, &resultInt); err == nil {
+				dv.Set(reflect.ValueOf(resultInt))
+			} else if err = json.Unmarshal(data, &resultFloat); err == nil {
+				dv.Set(reflect.ValueOf(resultFloat))
+			} else {
+				return fmt.Errorf("error decoding number from json: %v", err)
+			}
+		}
+
+		return nil
+	}
+
+	st, dt := sv.Type(), dv.Type()
+	switch st.Kind() {
+	case reflect.String:
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(stringType))
+		}
+		dv.Set(reflect.ValueOf(sv.String()))
+		return nil
+	case reflect.Bool:
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(boolType))
+		}
+		dv.Set(reflect.ValueOf(sv.Bool()))
+		return nil
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(int64Type))
+		}
+		dv.Set(reflect.ValueOf(sv.Int()))
+		return nil
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(uint64Type))
+		}
+		dv.Set(reflect.ValueOf(sv.Uint()))
+		return nil
+	case reflect.Float32, reflect.Float64:
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(float64Type))
+		}
+		dv.Set(reflect.ValueOf(sv.Float()))
+		return nil
+	case reflect.Map:
+		return mapToUnstructured(sv, dv)
+	case reflect.Slice:
+		return sliceToUnstructured(sv, dv)
+	case reflect.Ptr:
+		return pointerToUnstructured(sv, dv)
+	case reflect.Struct:
+		return structToUnstructured(sv, dv)
+	case reflect.Interface:
+		return interfaceToUnstructured(sv, dv)
+	default:
+		return fmt.Errorf("unrecognized type: %v", st.Kind())
+	}
+}
+
+func mapToUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if sv.IsNil() {
+		dv.Set(reflect.Zero(dt))
+		return nil
+	}
+	if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+		if st.Key().Kind() == reflect.String {
+			switch st.Elem().Kind() {
+			// TODO It should be possible to reuse the slice for primitive types.
+			// However, it is panicing in the following form.
+			// case reflect.String, reflect.Bool,
+			// 	reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+			// 	reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+			// 	sv.Set(sv)
+			// 	return nil
+			default:
+				// We need to do a proper conversion.
+			}
+		}
+		dv.Set(reflect.MakeMap(mapStringInterfaceType))
+		dv = dv.Elem()
+		dt = dv.Type()
+	}
+	if dt.Kind() != reflect.Map {
+		return fmt.Errorf("cannot convert struct to: %v", dt.Kind())
+	}
+
+	if !st.Key().AssignableTo(dt.Key()) && !st.Key().ConvertibleTo(dt.Key()) {
+		return fmt.Errorf("cannot copy map with non-assignable keys: %v %v", st.Key(), dt.Key())
+	}
+
+	for _, key := range sv.MapKeys() {
+		value := reflect.New(dt.Elem()).Elem()
+		if err := toUnstructured(sv.MapIndex(key), value); err != nil {
+			return err
+		}
+		if st.Key().AssignableTo(dt.Key()) {
+			dv.SetMapIndex(key, value)
+		} else {
+			dv.SetMapIndex(key.Convert(dt.Key()), value)
+		}
+	}
+	return nil
+}
+
+func sliceToUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if sv.IsNil() {
+		dv.Set(reflect.Zero(dt))
+		return nil
+	}
+	if st.Elem().Kind() == reflect.Uint8 {
+		dv.Set(reflect.New(stringType))
+		data, err := json.Marshal(sv.Bytes())
+		if err != nil {
+			return err
+		}
+		var result string
+		if err = json.Unmarshal(data, &result); err != nil {
+			return err
+		}
+		dv.Set(reflect.ValueOf(result))
+		return nil
+	}
+	if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+		switch st.Elem().Kind() {
+		// TODO It should be possible to reuse the slice for primitive types.
+		// However, it is panicing in the following form.
+		// case reflect.String, reflect.Bool,
+		// 	reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+		// 	reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		// 	sv.Set(sv)
+		// 	return nil
+		default:
+			// We need to do a proper conversion.
+			dv.Set(reflect.MakeSlice(reflect.SliceOf(dt), sv.Len(), sv.Cap()))
+			dv = dv.Elem()
+			dt = dv.Type()
+		}
+	}
+	if dt.Kind() != reflect.Slice {
+		return fmt.Errorf("cannot convert slice to: %v", dt.Kind())
+	}
+	for i := 0; i < sv.Len(); i++ {
+		if err := toUnstructured(sv.Index(i), dv.Index(i)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func pointerToUnstructured(sv, dv reflect.Value) error {
+	if sv.IsNil() {
+		// We're done - we don't need to store anything.
+		return nil
+	}
+	return toUnstructured(sv.Elem(), dv)
+}
+
+func isZero(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Array, 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:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.Map, reflect.Slice:
+		// TODO: It seems that 0-len maps are ignored in it.
+		return v.IsNil() || v.Len() == 0
+	case reflect.Ptr, reflect.Interface:
+		return v.IsNil()
+	}
+	return false
+}
+
+func structToUnstructured(sv, dv reflect.Value) error {
+	st, dt := sv.Type(), dv.Type()
+	if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+		dv.Set(reflect.MakeMap(mapStringInterfaceType))
+		dv = dv.Elem()
+		dt = dv.Type()
+	}
+	if dt.Kind() != reflect.Map {
+		return fmt.Errorf("cannot convert struct to: %v", dt.Kind())
+	}
+	realMap := dv.Interface().(map[string]interface{})
+
+	for i := 0; i < st.NumField(); i++ {
+		fieldInfo := fieldInfoFromField(st, i)
+		fv := sv.Field(i)
+
+		if fieldInfo.name == "-" {
+			// This field should be skipped.
+			continue
+		}
+		if fieldInfo.omitempty && isZero(fv) {
+			// omitempty fields should be ignored.
+			continue
+		}
+		if len(fieldInfo.name) == 0 {
+			// This field is inlined.
+			if err := toUnstructured(fv, dv); err != nil {
+				return err
+			}
+			continue
+		}
+		switch fv.Type().Kind() {
+		case reflect.String:
+			realMap[fieldInfo.name] = fv.String()
+		case reflect.Bool:
+			realMap[fieldInfo.name] = fv.Bool()
+		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+			realMap[fieldInfo.name] = fv.Int()
+		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+			realMap[fieldInfo.name] = fv.Uint()
+		case reflect.Float32, reflect.Float64:
+			realMap[fieldInfo.name] = fv.Float()
+		default:
+			subv := reflect.New(dt.Elem()).Elem()
+			if err := toUnstructured(fv, subv); err != nil {
+				return err
+			}
+			dv.SetMapIndex(fieldInfo.nameValue, subv)
+		}
+	}
+	return nil
+}
+
+func interfaceToUnstructured(sv, dv reflect.Value) error {
+	if !sv.IsValid() || sv.IsNil() {
+		dv.Set(reflect.Zero(dv.Type()))
+		return nil
+	}
+	return toUnstructured(sv.Elem(), dv)
+}

vendor/k8s.io/apimachinery/pkg/conversion/unstructured/doc.go

@@ -0,0 +1,19 @@
+/*
+Copyright 2017 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 unstructured provides conversion from runtime objects
+// to map[string]interface{} representation.
+package unstructured // import "k8s.io/apimachinery/pkg/conversion/unstructured"