feat: add toml config (#1899)

core/mapping/tomlunmarshaler.go

@@ -0,0 +1,29 @@
+package mapping
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+
+	"github.com/pelletier/go-toml/v2"
+)
+
+// UnmarshalTomlBytes unmarshals TOML bytes into the given v.
+func UnmarshalTomlBytes(content []byte, v interface{}) error {
+	return UnmarshalTomlReader(bytes.NewReader(content), v)
+}
+
+// UnmarshalTomlReader unmarshals TOML from the given io.Reader into the given v.
+func UnmarshalTomlReader(r io.Reader, v interface{}) error {
+	var val interface{}
+	if err := toml.NewDecoder(r).Decode(&val); err != nil {
+		return err
+	}
+
+	var buf bytes.Buffer
+	if err := json.NewEncoder(&buf).Encode(val); err != nil {
+		return err
+	}
+
+	return UnmarshalJsonReader(&buf, v)
+}