feat: accept camelcase for config keys (#2651)

* feat: accept camelcase for config keys

* chore: refactor

* chore: refactor

* chore: add more tests

* chore: refactor

* fix: map elements of array

core/mapping/yamlunmarshaler.go

@@ -1,101 +1,27 @@
 package mapping
 
 import (
-	"encoding/json"
-	"errors"
 	"io"
 
-	"gopkg.in/yaml.v2"
-)
-
-// To make .json & .yaml consistent, we just use json as the tag key.
-const yamlTagKey = "json"
-
-var (
-	// ErrUnsupportedType is an error that indicates the config format is not supported.
-	ErrUnsupportedType = errors.New("only map-like configs are supported")
-
-	yamlUnmarshaler = NewUnmarshaler(yamlTagKey)
+	"github.com/zeromicro/go-zero/internal/encoding"
 )
 
 // UnmarshalYamlBytes unmarshals content into v.
-func UnmarshalYamlBytes(content []byte, v interface{}) error {
-	return unmarshalYamlBytes(content, v, yamlUnmarshaler)
+func UnmarshalYamlBytes(content []byte, v interface{}, opts ...UnmarshalOption) error {
+	b, err := encoding.YamlToJson(content)
+	if err != nil {
+		return err
+	}
+
+	return UnmarshalJsonBytes(b, v, opts...)
 }
 
 // UnmarshalYamlReader unmarshals content from reader into v.
-func UnmarshalYamlReader(reader io.Reader, v interface{}) error {
-	return unmarshalYamlReader(reader, v, yamlUnmarshaler)
-}
-
-func cleanupInterfaceMap(in map[interface{}]interface{}) map[string]interface{} {
-	res := make(map[string]interface{})
-	for k, v := range in {
-		res[Repr(k)] = cleanupMapValue(v)
-	}
-	return res
-}
-
-func cleanupInterfaceNumber(in interface{}) json.Number {
-	return json.Number(Repr(in))
-}
-
-func cleanupInterfaceSlice(in []interface{}) []interface{} {
-	res := make([]interface{}, len(in))
-	for i, v := range in {
-		res[i] = cleanupMapValue(v)
-	}
-	return res
-}
-
-func cleanupMapValue(v interface{}) interface{} {
-	switch v := v.(type) {
-	case []interface{}:
-		return cleanupInterfaceSlice(v)
-	case map[interface{}]interface{}:
-		return cleanupInterfaceMap(v)
-	case bool, string:
-		return v
-	case int, uint, int8, uint8, int16, uint16, int32, uint32, int64, uint64, float32, float64:
-		return cleanupInterfaceNumber(v)
-	default:
-		return Repr(v)
-	}
-}
-
-func unmarshal(unmarshaler *Unmarshaler, o, v interface{}) error {
-	if m, ok := o.(map[string]interface{}); ok {
-		return unmarshaler.Unmarshal(m, v)
-	}
-
-	return ErrUnsupportedType
-}
-
-func unmarshalYamlBytes(content []byte, v interface{}, unmarshaler *Unmarshaler) error {
-	var o interface{}
-	if err := yamlUnmarshal(content, &o); err != nil {
+func UnmarshalYamlReader(reader io.Reader, v interface{}, opts ...UnmarshalOption) error {
+	b, err := io.ReadAll(reader)
+	if err != nil {
 		return err
 	}
 
-	return unmarshal(unmarshaler, o, v)
-}
-
-func unmarshalYamlReader(reader io.Reader, v interface{}, unmarshaler *Unmarshaler) error {
-	var res interface{}
-	if err := yaml.NewDecoder(reader).Decode(&res); err != nil {
-		return err
-	}
-
-	return unmarshal(unmarshaler, cleanupMapValue(res), v)
-}
-
-// yamlUnmarshal YAML to map[string]interface{} instead of map[interface{}]interface{}.
-func yamlUnmarshal(in []byte, out interface{}) error {
-	var res interface{}
-	if err := yaml.Unmarshal(in, &res); err != nil {
-		return err
-	}
-
-	*out.(*interface{}) = cleanupMapValue(res)
-	return nil
+	return UnmarshalYamlBytes(b, v, opts...)
 }