func progressBarForReader(out io.Writer, r io.Reader, l int64) (*pb.ProgressBar, io.Reader) {
// setup bar reader
// TODO: get total length of files
bar := pb.New64(l).SetUnits(pb.U_BYTES)
bar.Output = out
// the progress bar lib doesn't give us a way to get the width of the output,
// so as a hack we just use a callback to measure the output, then git rid of it
bar.Callback = func(line string) {
terminalWidth := len(line)
bar.Callback = nil
log.Infof("terminal width: %v\n", terminalWidth)
}
barR := bar.NewProxyReader(r)
return bar, &clearlineReader{barR, out}
}
return
}
silent, _, err := req.Option(silentOptionName).Bool()
if err != nil {
res.SetError(u.ErrCast(), cmds.ErrNormal)
return
}
if !quiet && !silent {
progress = true
}
var bar *pb.ProgressBar
if progress {
bar = pb.New64(0).SetUnits(pb.U_BYTES)
bar.ManualUpdate = true
bar.ShowTimeLeft = false
bar.ShowPercent = false
bar.Output = res.Stderr()
bar.Start()
}
var sizeChan chan int64
s, found := req.Values()["size"]
if found {
sizeChan = s.(chan int64)
}
lastFile := ""
var totalProgress, prevFiles, lastBytes int64