schnutibox/vendor/github.com/bufbuild/buf/internal/pkg/encoding/encoding.go
Marvin Steadfast ae35d9ab41
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uses buf for compiling proto files and implements the server service
2021-05-05 11:14:17 +02:00

165 lines
4.8 KiB
Go

// Copyright 2020-2021 Buf Technologies, Inc.
//
// 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 encoding provides encoding utilities.
package encoding
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"go.uber.org/multierr"
"gopkg.in/yaml.v3"
)
// UnmarshalJSONStrict unmarshals the data as JSON, returning a user error on failure.
//
// If the data length is 0, this is a no-op.
func UnmarshalJSONStrict(data []byte, v interface{}) error {
if len(data) == 0 {
return nil
}
jsonDecoder := json.NewDecoder(bytes.NewReader(data))
jsonDecoder.DisallowUnknownFields()
if err := jsonDecoder.Decode(v); err != nil {
return fmt.Errorf("could not unmarshal as JSON: %v", err)
}
return nil
}
// UnmarshalYAMLStrict unmarshals the data as YAML, returning a user error on failure.
//
// If the data length is 0, this is a no-op.
func UnmarshalYAMLStrict(data []byte, v interface{}) error {
if len(data) == 0 {
return nil
}
yamlDecoder := NewYAMLDecoderStrict(bytes.NewReader(data))
if err := yamlDecoder.Decode(v); err != nil {
return fmt.Errorf("could not unmarshal as YAML: %v", err)
}
return nil
}
// UnmarshalJSONOrYAMLStrict unmarshals the data as JSON or YAML in order, returning
// a user error with both errors on failure.
//
// If the data length is 0, this is a no-op.
func UnmarshalJSONOrYAMLStrict(data []byte, v interface{}) error {
if len(data) == 0 {
return nil
}
if jsonErr := UnmarshalJSONStrict(data, v); jsonErr != nil {
if yamlErr := UnmarshalYAMLStrict(data, v); yamlErr != nil {
return errors.New(jsonErr.Error() + "\n" + yamlErr.Error())
}
}
return nil
}
// UnmarshalJSONNonStrict unmarshals the data as JSON, returning a user error on failure.
//
// If the data length is 0, this is a no-op.
func UnmarshalJSONNonStrict(data []byte, v interface{}) error {
if len(data) == 0 {
return nil
}
jsonDecoder := json.NewDecoder(bytes.NewReader(data))
if err := jsonDecoder.Decode(v); err != nil {
return fmt.Errorf("could not unmarshal as JSON: %v", err)
}
return nil
}
// UnmarshalYAMLNonStrict unmarshals the data as YAML, returning a user error on failure.
//
// If the data length is 0, this is a no-op.
func UnmarshalYAMLNonStrict(data []byte, v interface{}) error {
if len(data) == 0 {
return nil
}
yamlDecoder := NewYAMLDecoderNonStrict(bytes.NewReader(data))
if err := yamlDecoder.Decode(v); err != nil {
return fmt.Errorf("could not unmarshal as YAML: %v", err)
}
return nil
}
// UnmarshalJSONOrYAMLNonStrict unmarshals the data as JSON or YAML in order, returning
// a user error with both errors on failure.
//
// If the data length is 0, this is a no-op.
func UnmarshalJSONOrYAMLNonStrict(data []byte, v interface{}) error {
if len(data) == 0 {
return nil
}
if jsonErr := UnmarshalJSONNonStrict(data, v); jsonErr != nil {
if yamlErr := UnmarshalYAMLNonStrict(data, v); yamlErr != nil {
return multierr.Append(jsonErr, yamlErr)
}
}
return nil
}
// GetJSONStringOrStringValue returns the JSON string for the RawMessage if the
// RawMessage is a string, and the raw value as a string otherwise.
//
// If the RawMessage is empty, this returns "".
func GetJSONStringOrStringValue(rawMessage json.RawMessage) string {
if len(rawMessage) == 0 {
return ""
}
var s string
if err := json.Unmarshal(rawMessage, &s); err == nil {
return s
}
return string(rawMessage)
}
// MarshalYAML marshals the given value into YAML.
func MarshalYAML(v interface{}) (_ []byte, retErr error) {
buffer := bytes.NewBuffer(nil)
yamlEncoder := NewYAMLEncoder(buffer)
defer func() {
retErr = multierr.Append(retErr, yamlEncoder.Close())
}()
if err := yamlEncoder.Encode(v); err != nil {
return nil, err
}
return buffer.Bytes(), nil
}
// NewYAMLEncoder creates a new YAML encoder reader from the Writer.
// The encoder must be closed after use.
func NewYAMLEncoder(writer io.Writer) *yaml.Encoder {
yamlEncoder := yaml.NewEncoder(writer)
yamlEncoder.SetIndent(2)
return yamlEncoder
}
// NewYAMLDecoderStrict creates a new YAML decoder from the reader.
func NewYAMLDecoderStrict(reader io.Reader) *yaml.Decoder {
yamlDecoder := yaml.NewDecoder(reader)
yamlDecoder.KnownFields(true)
return yamlDecoder
}
// NewYAMLDecoderNonStrict creates a new YAML decoder from the reader.
func NewYAMLDecoderNonStrict(reader io.Reader) *yaml.Decoder {
return yaml.NewDecoder(reader)
}