Feature request: Progress meter

[Futureknows]

A progress indicator would really be a useful. Progress bar with speed and percentage is optimal, but even just bytes written would be helpful for large backups.

[stewartadam]

Thanks for the suggestion - note that fwbackups is in maintenance mode so I will not be adding this for the time being, but would accept a PR if someone wishes to contribute it.

A more precise progress bar was tested during development, however it increased backup time (and marginally, CPU and memory usage during backup) as a progress bar requires a scan of the backup source dir trees before the backup starts, and also must then buffering the stdout output stream to parse the current file from tar/rsync. In tests with many small files in particular, this proved to slow the backup considerably.

Something like in the C++ branch where fwbackups doesn't resort to shell commands to run the backups would be more practical and also give us visibility into # of bytes copied.