Filter list action

[LeonB]

It would be nice if borg list with an archive as positional parameter would also support some kind filtering support. Maybe something like #361 but for the list action.

My use case: I have some kind of webbased dashboard checking if the borg backups includes a mysql dump located in /var/backups/mysql/. I now do borg list /media/backups/borg/myserver::2016-01-19 | grep "var/backups/mysql" but it takes a while to run that command.

[ThomasWaldmann]

The --filter only filters the status char borg create emits.

For borg list, there is no status char, so you maybe rather need to pipe through grep to search for filenames. Internal filtering would not make that faster as it has to read through the metadata list in any case.