1 files changed, 466 insertions, 0 deletions

diff --git a/vendor/gopkg.in/yaml.v2/yaml.go b/vendor/gopkg.in/yaml.v2/yaml.go
new file mode 100644
index 0000000..89650e2
--- /dev/null
+++ b/vendor/gopkg.in/yaml.v2/yaml.go
@@ -0,0 +1,466 @@
+// Package yaml implements YAML support for the Go language.
+//
+// Source code and other details for the project are available at GitHub:
+//
+//   https://github.com/go-yaml/yaml
+//
+package yaml
+
+import (
+        "errors"
+        "fmt"
+        "io"
+        "reflect"
+        "strings"
+        "sync"
+)
+
+// MapSlice encodes and decodes as a YAML map.
+// The order of keys is preserved when encoding and decoding.
+type MapSlice []MapItem
+
+// MapItem is an item in a MapSlice.
+type MapItem struct {
+        Key, Value interface{}
+}
+
+// The Unmarshaler interface may be implemented by types to customize their
+// behavior when being unmarshaled from a YAML document. The UnmarshalYAML
+// method receives a function that may be called to unmarshal the original
+// YAML value into a field or variable. It is safe to call the unmarshal
+// function parameter more than once if necessary.
+type Unmarshaler interface {
+        UnmarshalYAML(unmarshal func(interface{}) error) error
+}
+
+// The Marshaler interface may be implemented by types to customize their
+// behavior when being marshaled into a YAML document. The returned value
+// is marshaled in place of the original value implementing Marshaler.
+//
+// If an error is returned by MarshalYAML, the marshaling procedure stops
+// and returns with the provided error.
+type Marshaler interface {
+        MarshalYAML() (interface{}, error)
+}
+
+// Unmarshal decodes the first document found within the in byte slice
+// and assigns decoded values into the out value.
+//
+// Maps and pointers (to a struct, string, int, etc) are accepted as out
+// values. If an internal pointer within a struct is not initialized,
+// the yaml package will initialize it if necessary for unmarshalling
+// the provided data. The out parameter must not be nil.
+//
+// The type of the decoded values should be compatible with the respective
+// values in out. If one or more values cannot be decoded due to a type
+// mismatches, decoding continues partially until the end of the YAML
+// content, and a *yaml.TypeError is returned with details for all
+// missed values.
+//
+// Struct fields are only unmarshalled if they are exported (have an
+// upper case first letter), and are unmarshalled using the field name
+// lowercased as the default key. Custom keys may be defined via the
+// "yaml" name in the field tag: the content preceding the first comma
+// is used as the key, and the following comma-separated options are
+// used to tweak the marshalling process (see Marshal).
+// Conflicting names result in a runtime error.
+//
+// For example:
+//
+//     type T struct {
+//         F int `yaml:"a,omitempty"`
+//         B int
+//     }
+//     var t T
+//     yaml.Unmarshal([]byte("a: 1\nb: 2"), &t)
+//
+// See the documentation of Marshal for the format of tags and a list of
+// supported tag options.
+//
+func Unmarshal(in []byte, out interface{}) (err error) {
+        return unmarshal(in, out, false)
+}
+
+// UnmarshalStrict is like Unmarshal except that any fields that are found
+// in the data that do not have corresponding struct members, or mapping
+// keys that are duplicates, will result in
+// an error.
+func UnmarshalStrict(in []byte, out interface{}) (err error) {
+        return unmarshal(in, out, true)
+}
+
+// A Decoder reads and decodes YAML values from an input stream.
+type Decoder struct {
+        strict bool
+        parser *parser
+}
+
+// NewDecoder returns a new decoder that reads from r.
+//
+// The decoder introduces its own buffering and may read
+// data from r beyond the YAML values requested.
+func NewDecoder(r io.Reader) *Decoder {
+        return &Decoder{
+                parser: newParserFromReader(r),
+        }
+}
+
+// SetStrict sets whether strict decoding behaviour is enabled when
+// decoding items in the data (see UnmarshalStrict). By default, decoding is not strict.
+func (dec *Decoder) SetStrict(strict bool) {
+        dec.strict = strict
+}
+
+// Decode reads the next YAML-encoded value from its input
+// and stores it in the value pointed to by v.
+//
+// See the documentation for Unmarshal for details about the
+// conversion of YAML into a Go value.
+func (dec *Decoder) Decode(v interface{}) (err error) {
+        d := newDecoder(dec.strict)
+        defer handleErr(&err)
+        node := dec.parser.parse()
+        if node == nil {
+                return io.EOF
+        }
+        out := reflect.ValueOf(v)
+        if out.Kind() == reflect.Ptr && !out.IsNil() {
+                out = out.Elem()
+        }
+        d.unmarshal(node, out)
+        if len(d.terrors) > 0 {
+                return &TypeError{d.terrors}
+        }
+        return nil
+}
+
+func unmarshal(in []byte, out interface{}, strict bool) (err error) {
+        defer handleErr(&err)
+        d := newDecoder(strict)
+        p := newParser(in)
+        defer p.destroy()
+        node := p.parse()
+        if node != nil {
+                v := reflect.ValueOf(out)
+                if v.Kind() == reflect.Ptr && !v.IsNil() {
+                        v = v.Elem()
+                }
+                d.unmarshal(node, v)
+        }
+        if len(d.terrors) > 0 {
+                return &TypeError{d.terrors}
+        }
+        return nil
+}
+
+// Marshal serializes the value provided into a YAML document. The structure
+// of the generated document will reflect the structure of the value itself.
+// Maps and pointers (to struct, string, int, etc) are accepted as the in value.
+//
+// Struct fields are only marshalled if they are exported (have an upper case
+// first letter), and are marshalled using the field name lowercased as the
+// default key. Custom keys may be defined via the "yaml" name in the field
+// tag: the content preceding the first comma is used as the key, and the
+// following comma-separated options are used to tweak the marshalling process.
+// Conflicting names result in a runtime error.
+//
+// The field tag format accepted is:
+//
+//     `(...) yaml:"[<key>][,<flag1>[,<flag2>]]" (...)`
+//
+// The following flags are currently supported:
+//
+//     omitempty    Only include the field if it's not set to the zero
+//                  value for the type or to empty slices or maps.
+//                  Zero valued structs will be omitted if all their public
+//                  fields are zero, unless they implement an IsZero
+//                  method (see the IsZeroer interface type), in which
+//                  case the field will be included if that method returns true.
+//
+//     flow         Marshal using a flow style (useful for structs,
+//                  sequences and maps).
+//
+//     inline       Inline the field, which must be a struct or a map,
+//                  causing all of its fields or keys to be processed as if
+//                  they were part of the outer struct. For maps, keys must
+//                  not conflict with the yaml keys of other struct fields.
+//
+// In addition, if the key is "-", the field is ignored.
+//
+// For example:
+//
+//     type T struct {
+//         F int `yaml:"a,omitempty"`
+//         B int
+//     }
+//     yaml.Marshal(&T{B: 2}) // Returns "b: 2\n"
+//     yaml.Marshal(&T{F: 1}} // Returns "a: 1\nb: 0\n"
+//
+func Marshal(in interface{}) (out []byte, err error) {
+        defer handleErr(&err)
+        e := newEncoder()
+        defer e.destroy()
+        e.marshalDoc("", reflect.ValueOf(in))
+        e.finish()
+        out = e.out
+        return
+}
+
+// An Encoder writes YAML values to an output stream.
+type Encoder struct {
+        encoder *encoder
+}
+
+// NewEncoder returns a new encoder that writes to w.
+// The Encoder should be closed after use to flush all data
+// to w.
+func NewEncoder(w io.Writer) *Encoder {
+        return &Encoder{
+                encoder: newEncoderWithWriter(w),
+        }
+}
+
+// Encode writes the YAML encoding of v to the stream.
+// If multiple items are encoded to the stream, the
+// second and subsequent document will be preceded
+// with a "---" document separator, but the first will not.
+//
+// See the documentation for Marshal for details about the conversion of Go
+// values to YAML.
+func (e *Encoder) Encode(v interface{}) (err error) {
+        defer handleErr(&err)
+        e.encoder.marshalDoc("", reflect.ValueOf(v))
+        return nil
+}
+
+// Close closes the encoder by writing any remaining data.
+// It does not write a stream terminating string "...".
+func (e *Encoder) Close() (err error) {
+        defer handleErr(&err)
+        e.encoder.finish()
+        return nil
+}
+
+func handleErr(err *error) {
+        if v := recover(); v != nil {
+                if e, ok := v.(yamlError); ok {
+                        *err = e.err
+                } else {
+                        panic(v)
+                }
+        }
+}
+
+type yamlError struct {
+        err error
+}
+
+func fail(err error) {
+        panic(yamlError{err})
+}
+
+func failf(format string, args ...interface{}) {
+        panic(yamlError{fmt.Errorf("yaml: "+format, args...)})
+}
+
+// A TypeError is returned by Unmarshal when one or more fields in
+// the YAML document cannot be properly decoded into the requested
+// types. When this error is returned, the value is still
+// unmarshaled partially.
+type TypeError struct {
+        Errors []string
+}
+
+func (e *TypeError) Error() string {
+        return fmt.Sprintf("yaml: unmarshal errors:\n  %s", strings.Join(e.Errors, "\n  "))
+}
+
+// --------------------------------------------------------------------------
+// Maintain a mapping of keys to structure field indexes
+
+// The code in this section was copied from mgo/bson.
+
+// structInfo holds details for the serialization of fields of
+// a given struct.
+type structInfo struct {
+        FieldsMap  map[string]fieldInfo
+        FieldsList []fieldInfo
+
+        // InlineMap is the number of the field in the struct that
+        // contains an ,inline map, or -1 if there's none.
+        InlineMap int
+}
+
+type fieldInfo struct {
+        Key       string
+        Num       int
+        OmitEmpty bool
+        Flow      bool
+        // Id holds the unique field identifier, so we can cheaply
+        // check for field duplicates without maintaining an extra map.
+        Id int
+
+        // Inline holds the field index if the field is part of an inlined struct.
+        Inline []int
+}
+
+var structMap = make(map[reflect.Type]*structInfo)
+var fieldMapMutex sync.RWMutex
+
+func getStructInfo(st reflect.Type) (*structInfo, error) {
+        fieldMapMutex.RLock()
+        sinfo, found := structMap[st]
+        fieldMapMutex.RUnlock()
+        if found {
+                return sinfo, nil
+        }
+
+        n := st.NumField()
+        fieldsMap := make(map[string]fieldInfo)
+        fieldsList := make([]fieldInfo, 0, n)
+        inlineMap := -1
+        for i := 0; i != n; i++ {
+                field := st.Field(i)
+                if field.PkgPath != "" && !field.Anonymous {
+                        continue // Private field
+                }
+
+                info := fieldInfo{Num: i}
+
+                tag := field.Tag.Get("yaml")
+                if tag == "" && strings.Index(string(field.Tag), ":") < 0 {
+                        tag = string(field.Tag)
+                }
+                if tag == "-" {
+                        continue
+                }
+
+                inline := false
+                fields := strings.Split(tag, ",")
+                if len(fields) > 1 {
+                        for _, flag := range fields[1:] {
+                                switch flag {
+                                case "omitempty":
+                                        info.OmitEmpty = true
+                                case "flow":
+                                        info.Flow = true
+                                case "inline":
+                                        inline = true
+                                default:
+                                        return nil, errors.New(fmt.Sprintf("Unsupported flag %q in tag %q of type %s", flag, tag, st))
+                                }
+                        }
+                        tag = fields[0]
+                }
+
+                if inline {
+                        switch field.Type.Kind() {
+                        case reflect.Map:
+                                if inlineMap >= 0 {
+                                        return nil, errors.New("Multiple ,inline maps in struct " + st.String())
+                                }
+                                if field.Type.Key() != reflect.TypeOf("") {
+                                        return nil, errors.New("Option ,inline needs a map with string keys in struct " + st.String())
+                                }
+                                inlineMap = info.Num
+                        case reflect.Struct:
+                                sinfo, err := getStructInfo(field.Type)
+                                if err != nil {
+                                        return nil, err
+                                }
+                                for _, finfo := range sinfo.FieldsList {
+                                        if _, found := fieldsMap[finfo.Key]; found {
+                                                msg := "Duplicated key '" + finfo.Key + "' in struct " + st.String()
+                                                return nil, errors.New(msg)
+                                        }
+                                        if finfo.Inline == nil {
+                                                finfo.Inline = []int{i, finfo.Num}
+                                        } else {
+                                                finfo.Inline = append([]int{i}, finfo.Inline...)
+                                        }
+                                        finfo.Id = len(fieldsList)
+                                        fieldsMap[finfo.Key] = finfo
+                                        fieldsList = append(fieldsList, finfo)
+                                }
+                        default:
+                                //return nil, errors.New("Option ,inline needs a struct value or map field")
+                                return nil, errors.New("Option ,inline needs a struct value field")
+                        }
+                        continue
+                }
+
+                if tag != "" {
+                        info.Key = tag
+                } else {
+                        info.Key = strings.ToLower(field.Name)
+                }
+
+                if _, found = fieldsMap[info.Key]; found {
+                        msg := "Duplicated key '" + info.Key + "' in struct " + st.String()
+                        return nil, errors.New(msg)
+                }
+
+                info.Id = len(fieldsList)
+                fieldsList = append(fieldsList, info)
+                fieldsMap[info.Key] = info
+        }
+
+        sinfo = &structInfo{
+                FieldsMap:  fieldsMap,
+                FieldsList: fieldsList,
+                InlineMap:  inlineMap,
+        }
+
+        fieldMapMutex.Lock()
+        structMap[st] = sinfo
+        fieldMapMutex.Unlock()
+        return sinfo, nil
+}
+
+// IsZeroer is used to check whether an object is zero to
+// determine whether it should be omitted when marshaling
+// with the omitempty flag. One notable implementation
+// is time.Time.
+type IsZeroer interface {
+        IsZero() bool
+}
+
+func isZero(v reflect.Value) bool {
+        kind := v.Kind()
+        if z, ok := v.Interface().(IsZeroer); ok {
+                if (kind == reflect.Ptr || kind == reflect.Interface) && v.IsNil() {
+                        return true
+                }
+                return z.IsZero()
+        }
+        switch kind {
+        case reflect.String:
+                return len(v.String()) == 0
+        case reflect.Interface, reflect.Ptr:
+                return v.IsNil()
+        case reflect.Slice:
+                return v.Len() == 0
+        case reflect.Map:
+                return v.Len() == 0
+        case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+                return v.Int() == 0
+        case reflect.Float32, reflect.Float64:
+                return v.Float() == 0
+        case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+                return v.Uint() == 0
+        case reflect.Bool:
+                return !v.Bool()
+        case reflect.Struct:
+                vt := v.Type()
+                for i := v.NumField() - 1; i >= 0; i-- {
+                        if vt.Field(i).PkgPath != "" {
+                                continue // Private field
+                        }
+                        if !isZero(v.Field(i)) {
+                                return false
+                        }
+                }
+                return true
+        }
+        return false
+}