Updating ghodss/yaml and gopkg.in/yaml.v2 to latest version

Change-Id: I1f1a10b68a2d3e796724c6ac26f0ed3260153588

vendor/github.com/ghodss/yaml/.travis.yml

@@ -1,7 +1,8 @@
 language: go
 go:
-  - 1.3
-  - 1.4
+  - "1.3"
+  - "1.4"
+  - "1.10"
 script:
   - go test
   - go build

vendor/github.com/ghodss/yaml/BUILD

@@ -5,6 +5,7 @@ go_library(
     srcs = [
         "fields.go",
         "yaml.go",
+        "yaml_go110.go",
     ],
     importmap = "k8s.io/kubernetes/vendor/github.com/ghodss/yaml",
     importpath = "github.com/ghodss/yaml",

vendor/github.com/ghodss/yaml/README.md

@@ -4,13 +4,13 @@
 
 ## Introduction
 
-A wrapper around [go-yaml](https://github.com/go-yaml/yaml) designed to enable a better way of handling YAML when marshaling to and from structs. 
+A wrapper around [go-yaml](https://github.com/go-yaml/yaml) designed to enable a better way of handling YAML when marshaling to and from structs.
 
 In short, this library first converts YAML to JSON using go-yaml and then uses `json.Marshal` and `json.Unmarshal` to convert to or from the struct. This means that it effectively reuses the JSON struct tags as well as the custom JSON methods `MarshalJSON` and `UnmarshalJSON` unlike go-yaml. For a detailed overview of the rationale behind this method, [see this blog post](http://ghodss.com/2014/the-right-way-to-handle-yaml-in-golang/).
 
 ## Compatibility
 
-This package uses [go-yaml v2](https://github.com/go-yaml/yaml) and therefore supports [everything go-yaml supports](https://github.com/go-yaml/yaml#compatibility).
+This package uses [go-yaml](https://github.com/go-yaml/yaml) and therefore supports [everything go-yaml supports](https://github.com/go-yaml/yaml#compatibility).
 
 ## Caveats
 
@@ -44,6 +44,8 @@ import "github.com/ghodss/yaml"
 Usage is very similar to the JSON library:
 
 ```go
+package main
+
 import (
 	"fmt"
 
@@ -51,8 +53,8 @@ import (
 )
 
 type Person struct {
-	Name string `json:"name"`  // Affects YAML field names too.
-	Age int `json:"name"`
+	Name string `json:"name"` // Affects YAML field names too.
+	Age  int    `json:"age"`
 }
 
 func main() {
@@ -65,13 +67,13 @@ func main() {
 	}
 	fmt.Println(string(y))
 	/* Output:
-	name: John
 	age: 30
+	name: John
 	*/
 
 	// Unmarshal the YAML back into a Person struct.
 	var p2 Person
-	err := yaml.Unmarshal(y, &p2)
+	err = yaml.Unmarshal(y, &p2)
 	if err != nil {
 		fmt.Printf("err: %v\n", err)
 		return
@@ -86,11 +88,14 @@ func main() {
 `yaml.YAMLToJSON` and `yaml.JSONToYAML` methods are also available:
 
 ```go
+package main
+
 import (
 	"fmt"
 
 	"github.com/ghodss/yaml"
 )
+
 func main() {
 	j := []byte(`{"name": "John", "age": 30}`)
 	y, err := yaml.JSONToYAML(j)

vendor/github.com/ghodss/yaml/fields.go

@@ -45,7 +45,11 @@ func indirect(v reflect.Value, decodingNull bool) (json.Unmarshaler, encoding.Te
 			break
 		}
 		if v.IsNil() {
-			v.Set(reflect.New(v.Type().Elem()))
+			if v.CanSet() {
+				v.Set(reflect.New(v.Type().Elem()))
+			} else {
+				v = reflect.New(v.Type().Elem())
+			}
 		}
 		if v.Type().NumMethod() > 0 {
 			if u, ok := v.Interface().(json.Unmarshaler); ok {

vendor/github.com/ghodss/yaml/yaml.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"io"
 	"reflect"
 	"strconv"
 
@@ -15,26 +16,30 @@ import (
 func Marshal(o interface{}) ([]byte, error) {
 	j, err := json.Marshal(o)
 	if err != nil {
-		return nil, fmt.Errorf("error marshaling into JSON: ", err)
+		return nil, fmt.Errorf("error marshaling into JSON: %v", err)
 	}
 
 	y, err := JSONToYAML(j)
 	if err != nil {
-		return nil, fmt.Errorf("error converting JSON to YAML: ", err)
+		return nil, fmt.Errorf("error converting JSON to YAML: %v", err)
 	}
 
 	return y, nil
 }
 
-// Converts YAML to JSON then uses JSON to unmarshal into an object.
-func Unmarshal(y []byte, o interface{}) error {
+// JSONOpt is a decoding option for decoding from JSON format.
+type JSONOpt func(*json.Decoder) *json.Decoder
+
+// Unmarshal converts YAML to JSON then uses JSON to unmarshal into an object,
+// optionally configuring the behavior of the JSON unmarshal.
+func Unmarshal(y []byte, o interface{}, opts ...JSONOpt) error {
 	vo := reflect.ValueOf(o)
-	j, err := yamlToJSON(y, &vo)
+	j, err := yamlToJSON(y, &vo, yaml.Unmarshal)
 	if err != nil {
 		return fmt.Errorf("error converting YAML to JSON: %v", err)
 	}
 
-	err = json.Unmarshal(j, o)
+	err = jsonUnmarshal(bytes.NewReader(j), o, opts...)
 	if err != nil {
 		return fmt.Errorf("error unmarshaling JSON: %v", err)
 	}
@@ -42,13 +47,28 @@ func Unmarshal(y []byte, o interface{}) error {
 	return nil
 }
 
+// jsonUnmarshal unmarshals the JSON byte stream from the given reader into the
+// object, optionally applying decoder options prior to decoding.  We are not
+// using json.Unmarshal directly as we want the chance to pass in non-default
+// options.
+func jsonUnmarshal(r io.Reader, o interface{}, opts ...JSONOpt) error {
+	d := json.NewDecoder(r)
+	for _, opt := range opts {
+		d = opt(d)
+	}
+	if err := d.Decode(&o); err != nil {
+		return fmt.Errorf("while decoding JSON: %v", err)
+	}
+	return nil
+}
+
 // Convert JSON to YAML.
 func JSONToYAML(j []byte) ([]byte, error) {
 	// Convert the JSON to an object.
 	var jsonObj interface{}
 	// We are using yaml.Unmarshal here (instead of json.Unmarshal) because the
 	// Go JSON library doesn't try to pick the right number type (int, float,
-	// etc.) when unmarshling to interface{}, it just picks float64
+	// etc.) when unmarshalling to interface{}, it just picks float64
 	// universally. go-yaml does go through the effort of picking the right
 	// number type, so we can preserve number type throughout this process.
 	err := yaml.Unmarshal(j, &jsonObj)
@@ -60,8 +80,8 @@ func JSONToYAML(j []byte) ([]byte, error) {
 	return yaml.Marshal(jsonObj)
 }
 
-// Convert YAML to JSON. Since JSON is a subset of YAML, passing JSON through
-// this method should be a no-op.
+// YAMLToJSON converts YAML to JSON. Since JSON is a subset of YAML,
+// passing JSON through this method should be a no-op.
 //
 // Things YAML can do that are not supported by JSON:
 // * In YAML you can have binary and null keys in your maps. These are invalid
@@ -70,14 +90,22 @@ func JSONToYAML(j []byte) ([]byte, error) {
 //   use binary data with this library, encode the data as base64 as usual but do
 //   not use the !!binary tag in your YAML. This will ensure the original base64
 //   encoded data makes it all the way through to the JSON.
+//
+// For strict decoding of YAML, use YAMLToJSONStrict.
 func YAMLToJSON(y []byte) ([]byte, error) {
-	return yamlToJSON(y, nil)
+	return yamlToJSON(y, nil, yaml.Unmarshal)
 }
 
-func yamlToJSON(y []byte, jsonTarget *reflect.Value) ([]byte, error) {
+// YAMLToJSONStrict is like YAMLToJSON but enables strict YAML decoding,
+// returning an error on any duplicate field names.
+func YAMLToJSONStrict(y []byte) ([]byte, error) {
+	return yamlToJSON(y, nil, yaml.UnmarshalStrict)
+}
+
+func yamlToJSON(y []byte, jsonTarget *reflect.Value, yamlUnmarshal func([]byte, interface{}) error) ([]byte, error) {
 	// Convert the YAML to an object.
 	var yamlObj interface{}
-	err := yaml.Unmarshal(y, &yamlObj)
+	err := yamlUnmarshal(y, &yamlObj)
 	if err != nil {
 		return nil, err
 	}

vendor/github.com/ghodss/yaml/yaml_go110.go

@@ -0,0 +1,14 @@
+// This file contains changes that are only compatible with go 1.10 and onwards.
+
+// +build go1.10
+
+package yaml
+
+import "encoding/json"
+
+// DisallowUnknownFields configures the JSON decoder to error out if unknown
+// fields come along, instead of dropping them by default.
+func DisallowUnknownFields(d *json.Decoder) *json.Decoder {
+	d.DisallowUnknownFields()
+	return d
+}