func upgrade2To3(db *bolt.DB) error { fmt.Println("Upgrading v2 to v3...") tx, err := db.Begin(true) if err != nil { return err } defer tx.Rollback() fmt.Println("Upgrading bucket", string(logBucket)) lb := tx.Bucket(logBucket) c := lb.Cursor() for k, v := c.First(); k != nil; k, v = c.Next() { var delta proto.LogDelta err := delta.Unmarshal(v) if err != nil { return err } delta.Quad.Upgrade() data, err := delta.Marshal() if err != nil { return err } lb.Put(k, data) } if err := tx.Commit(); err != nil { return err } tx, err = db.Begin(true) if err != nil { return err } defer tx.Rollback() fmt.Println("Upgrading bucket", string(nodeBucket)) nb := tx.Bucket(nodeBucket) c = nb.Cursor() for k, v := c.First(); k != nil; k, v = c.Next() { var vd proto.NodeData err := vd.Unmarshal(v) if err != nil { return err } vd.Upgrade() data, err := vd.Marshal() if err != nil { return err } nb.Put(k, data) } if err := tx.Commit(); err != nil { return err } return nil }