diff options
Diffstat (limited to 'vendor/sigs.k8s.io/yaml/yaml.go')
| -rw-r--r-- | vendor/sigs.k8s.io/yaml/yaml.go | 380 |
1 files changed, 0 insertions, 380 deletions
diff --git a/vendor/sigs.k8s.io/yaml/yaml.go b/vendor/sigs.k8s.io/yaml/yaml.go deleted file mode 100644 index efbc535d4..000000000 --- a/vendor/sigs.k8s.io/yaml/yaml.go +++ /dev/null @@ -1,380 +0,0 @@ -package yaml - -import ( - "bytes" - "encoding/json" - "fmt" - "io" - "reflect" - "strconv" - - "gopkg.in/yaml.v2" -) - -// Marshal marshals the object into JSON then converts JSON to YAML and returns the -// YAML. -func Marshal(o interface{}) ([]byte, error) { - j, err := json.Marshal(o) - if err != nil { - 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: %v", err) - } - - return y, nil -} - -// 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 { - return yamlUnmarshal(y, o, false, opts...) -} - -// UnmarshalStrict strictly converts YAML to JSON then uses JSON to unmarshal -// into an object, optionally configuring the behavior of the JSON unmarshal. -func UnmarshalStrict(y []byte, o interface{}, opts ...JSONOpt) error { - return yamlUnmarshal(y, o, true, append(opts, DisallowUnknownFields)...) -} - -// yamlUnmarshal unmarshals the given YAML byte stream into the given interface, -// optionally performing the unmarshalling strictly -func yamlUnmarshal(y []byte, o interface{}, strict bool, opts ...JSONOpt) error { - vo := reflect.ValueOf(o) - unmarshalFn := yaml.Unmarshal - if strict { - unmarshalFn = yaml.UnmarshalStrict - } - j, err := yamlToJSON(y, &vo, unmarshalFn) - if err != nil { - return fmt.Errorf("error converting YAML to JSON: %v", err) - } - - err = jsonUnmarshal(bytes.NewReader(j), o, opts...) - if err != nil { - return fmt.Errorf("error unmarshaling JSON: %v", err) - } - - 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 -} - -// JSONToYAML Converts 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 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) - if err != nil { - return nil, err - } - - // Marshal this object into YAML. - return yaml.Marshal(jsonObj) -} - -// 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 -// in JSON. (int and float keys are converted to strings.) -// * Binary data in YAML with the !!binary tag is not supported. If you want to -// 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, yaml.Unmarshal) -} - -// 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 := yamlUnmarshal(y, &yamlObj) - if err != nil { - return nil, err - } - - // YAML objects are not completely compatible with JSON objects (e.g. you - // can have non-string keys in YAML). So, convert the YAML-compatible object - // to a JSON-compatible object, failing with an error if irrecoverable - // incompatibilties happen along the way. - jsonObj, err := convertToJSONableObject(yamlObj, jsonTarget) - if err != nil { - return nil, err - } - - // Convert this object to JSON and return the data. - return json.Marshal(jsonObj) -} - -func convertToJSONableObject(yamlObj interface{}, jsonTarget *reflect.Value) (interface{}, error) { - var err error - - // Resolve jsonTarget to a concrete value (i.e. not a pointer or an - // interface). We pass decodingNull as false because we're not actually - // decoding into the value, we're just checking if the ultimate target is a - // string. - if jsonTarget != nil { - ju, tu, pv := indirect(*jsonTarget, false) - // We have a JSON or Text Umarshaler at this level, so we can't be trying - // to decode into a string. - if ju != nil || tu != nil { - jsonTarget = nil - } else { - jsonTarget = &pv - } - } - - // If yamlObj is a number or a boolean, check if jsonTarget is a string - - // if so, coerce. Else return normal. - // If yamlObj is a map or array, find the field that each key is - // unmarshaling to, and when you recurse pass the reflect.Value for that - // field back into this function. - switch typedYAMLObj := yamlObj.(type) { - case map[interface{}]interface{}: - // JSON does not support arbitrary keys in a map, so we must convert - // these keys to strings. - // - // From my reading of go-yaml v2 (specifically the resolve function), - // keys can only have the types string, int, int64, float64, binary - // (unsupported), or null (unsupported). - strMap := make(map[string]interface{}) - for k, v := range typedYAMLObj { - // Resolve the key to a string first. - var keyString string - switch typedKey := k.(type) { - case string: - keyString = typedKey - case int: - keyString = strconv.Itoa(typedKey) - case int64: - // go-yaml will only return an int64 as a key if the system - // architecture is 32-bit and the key's value is between 32-bit - // and 64-bit. Otherwise the key type will simply be int. - keyString = strconv.FormatInt(typedKey, 10) - case float64: - // Stolen from go-yaml to use the same conversion to string as - // the go-yaml library uses to convert float to string when - // Marshaling. - s := strconv.FormatFloat(typedKey, 'g', -1, 32) - switch s { - case "+Inf": - s = ".inf" - case "-Inf": - s = "-.inf" - case "NaN": - s = ".nan" - } - keyString = s - case bool: - if typedKey { - keyString = "true" - } else { - keyString = "false" - } - default: - return nil, fmt.Errorf("Unsupported map key of type: %s, key: %+#v, value: %+#v", - reflect.TypeOf(k), k, v) - } - - // jsonTarget should be a struct or a map. If it's a struct, find - // the field it's going to map to and pass its reflect.Value. If - // it's a map, find the element type of the map and pass the - // reflect.Value created from that type. If it's neither, just pass - // nil - JSON conversion will error for us if it's a real issue. - if jsonTarget != nil { - t := *jsonTarget - if t.Kind() == reflect.Struct { - keyBytes := []byte(keyString) - // Find the field that the JSON library would use. - var f *field - fields := cachedTypeFields(t.Type()) - for i := range fields { - ff := &fields[i] - if bytes.Equal(ff.nameBytes, keyBytes) { - f = ff - break - } - // Do case-insensitive comparison. - if f == nil && ff.equalFold(ff.nameBytes, keyBytes) { - f = ff - } - } - if f != nil { - // Find the reflect.Value of the most preferential - // struct field. - jtf := t.Field(f.index[0]) - strMap[keyString], err = convertToJSONableObject(v, &jtf) - if err != nil { - return nil, err - } - continue - } - } else if t.Kind() == reflect.Map { - // Create a zero value of the map's element type to use as - // the JSON target. - jtv := reflect.Zero(t.Type().Elem()) - strMap[keyString], err = convertToJSONableObject(v, &jtv) - if err != nil { - return nil, err - } - continue - } - } - strMap[keyString], err = convertToJSONableObject(v, nil) - if err != nil { - return nil, err - } - } - return strMap, nil - case []interface{}: - // We need to recurse into arrays in case there are any - // map[interface{}]interface{}'s inside and to convert any - // numbers to strings. - - // If jsonTarget is a slice (which it really should be), find the - // thing it's going to map to. If it's not a slice, just pass nil - // - JSON conversion will error for us if it's a real issue. - var jsonSliceElemValue *reflect.Value - if jsonTarget != nil { - t := *jsonTarget - if t.Kind() == reflect.Slice { - // By default slices point to nil, but we need a reflect.Value - // pointing to a value of the slice type, so we create one here. - ev := reflect.Indirect(reflect.New(t.Type().Elem())) - jsonSliceElemValue = &ev - } - } - - // Make and use a new array. - arr := make([]interface{}, len(typedYAMLObj)) - for i, v := range typedYAMLObj { - arr[i], err = convertToJSONableObject(v, jsonSliceElemValue) - if err != nil { - return nil, err - } - } - return arr, nil - default: - // If the target type is a string and the YAML type is a number, - // convert the YAML type to a string. - if jsonTarget != nil && (*jsonTarget).Kind() == reflect.String { - // Based on my reading of go-yaml, it may return int, int64, - // float64, or uint64. - var s string - switch typedVal := typedYAMLObj.(type) { - case int: - s = strconv.FormatInt(int64(typedVal), 10) - case int64: - s = strconv.FormatInt(typedVal, 10) - case float64: - s = strconv.FormatFloat(typedVal, 'g', -1, 32) - case uint64: - s = strconv.FormatUint(typedVal, 10) - case bool: - if typedVal { - s = "true" - } else { - s = "false" - } - } - if len(s) > 0 { - yamlObj = interface{}(s) - } - } - return yamlObj, nil - } -} - -// JSONObjectToYAMLObject converts an in-memory JSON object into a YAML in-memory MapSlice, -// without going through a byte representation. A nil or empty map[string]interface{} input is -// converted to an empty map, i.e. yaml.MapSlice(nil). -// -// interface{} slices stay interface{} slices. map[string]interface{} becomes yaml.MapSlice. -// -// int64 and float64 are down casted following the logic of github.com/go-yaml/yaml: -// - float64s are down-casted as far as possible without data-loss to int, int64, uint64. -// - int64s are down-casted to int if possible without data-loss. -// -// Big int/int64/uint64 do not lose precision as in the json-yaml roundtripping case. -// -// string, bool and any other types are unchanged. -func JSONObjectToYAMLObject(j map[string]interface{}) yaml.MapSlice { - if len(j) == 0 { - return nil - } - ret := make(yaml.MapSlice, 0, len(j)) - for k, v := range j { - ret = append(ret, yaml.MapItem{Key: k, Value: jsonToYAMLValue(v)}) - } - return ret -} - -func jsonToYAMLValue(j interface{}) interface{} { - switch j := j.(type) { - case map[string]interface{}: - if j == nil { - return interface{}(nil) - } - return JSONObjectToYAMLObject(j) - case []interface{}: - if j == nil { - return interface{}(nil) - } - ret := make([]interface{}, len(j)) - for i := range j { - ret[i] = jsonToYAMLValue(j[i]) - } - return ret - case float64: - // replicate the logic in https://github.com/go-yaml/yaml/blob/51d6538a90f86fe93ac480b35f37b2be17fef232/resolve.go#L151 - if i64 := int64(j); j == float64(i64) { - if i := int(i64); i64 == int64(i) { - return i - } - return i64 - } - if ui64 := uint64(j); j == float64(ui64) { - return ui64 - } - return j - case int64: - if i := int(j); j == int64(i) { - return i - } - return j - } - return j -} |