- stdout, stderr, err := wkr.executor.Execute(nil, cmd, nil)
+ var stdin io.Reader
+ if prices := wkr.instance.PriceHistory(wkr.instType); len(prices) > 0 {
+ j, _ := json.Marshal(prices)
+ stdin = bytes.NewReader(j)
+ }
+ stdout, stderr, err := wkr.executor.Execute(nil, cmd, stdin)