It would be great if the progress object would provide the information about the sourcePath and destinationPath.

One of my use cases requires copying folders with many files.
The information about which file is being copied would be very useful.

I took a quick look at the code and the internal library cp-file already provides the desired information.

Is there any reason not to add this information to the ProgressData object?

{
  sourcePath: string,         <--
  destinationPath: string,    <--
  completedFiles: number,
  totalFiles: number,
  completedSize: number,
  percent: number,
}