feat(ttl): added ttl support in dump/restore

cmd/dump.go

@@ -16,6 +16,7 @@ type dumpEntry struct {
 	Value     string `json:"value"`
 	Encoding  string `json:"encoding,omitempty"`
 	Secret    bool   `json:"secret,omitempty"`
+	ExpiresAt *int64 `json:"expires_at,omitempty"`
 }
 
 var dumpCmd = &cobra.Command{
@@ -76,11 +77,16 @@ func dump(cmd *cobra.Command, args []string) error {
 				if isSecret && !includeSecret {
 					continue
 				}
+				expiresAt := item.ExpiresAt()
 				if err := item.Value(func(v []byte) error {
 					entry := dumpEntry{
 						Key:    string(key),
 						Secret: isSecret,
 					}
+					if expiresAt > 0 {
+						ts := int64(expiresAt)
+						entry.ExpiresAt = &ts
+					}
 					switch mode {
 					case "base64":
 						encodeBase64(&entry, v)

cmd/restore.go

@@ -81,6 +81,12 @@ func restore(cmd *cobra.Command, args []string) error {
 		}
 
 		writeEntry := badger.NewEntry([]byte(entry.Key), value).WithMeta(entryMeta)
+		if entry.ExpiresAt != nil {
+			if *entry.ExpiresAt < 0 {
+				return fmt.Errorf("line %d: expires_at must be >= 0", lineNo)
+			}
+			writeEntry.ExpiresAt = uint64(*entry.ExpiresAt)
+		}
 
 		if err := wb.SetEntry(writeEntry); err != nil {
 			return fmt.Errorf("line %d: %w", lineNo, err)