feat(secrets): allow diffing stringData sections of secrets as well as data sections

Author: philomory

diff/diff.go

@@ -2,6 +2,7 @@ package diff
 
 import (
 	"bytes"
+	"encoding/base64"
 	"fmt"
 	"io"
 	"math"
@@ -180,6 +181,15 @@ func redactSecrets(old, new *manifest.MappingResult) {
 		}
 	}
 	if new != nil {
+		if newSecret.Data == nil {
+			newSecret.Data = make(map[string][]byte, len(newSecret.StringData))
+		}
+		for k, v := range newSecret.StringData {
+			data := []byte(v)
+			dst := make([]byte, base64.StdEncoding.EncodedLen(len(data)))
+			base64.StdEncoding.Encode(dst, data)
+			newSecret.Data[k] = dst
+		}
 		newSecret.StringData = make(map[string]string, len(newSecret.Data))
 		for k, v := range newSecret.Data {
 			if old != nil && bytes.Equal(v, oldSecret.Data[k]) {