Add support for GNU tar incremental backups

See discussion here. Not showing a merged view of the snapshots is one thing but I even have input/output errors when trying to descend into such a snapshot “folder”. That should not happen. Those snapshots would map surprisingly well to the FileVersionLayer! Except of course that they have different numbers. What even is that number? It does not seem to be a Unix time stamp?

[mxmlnkn]

now if i want to make an incremental backup i run this?: sudo tar -cvvp --listed-incremental=/media/dacorsa/HDext2TB/Backup-NanoKDE/backup-nvme0n1.snar --file=/media/dacorsa/HDext2TB/Backup-NanoKDE/backup-nvme0n12.tar --one-file-system --exclude={/backup-.tar,/dev/,/proc/,/sys/,/tmp/,/run/,/mnt/,/media/,/lost+found,/home//.cache,/home//.gvfs,/home//.local/share/Trash,/usr/src/linux-headers,/var/cache/apt/archives,/var/log} /

with this file name? backup-nvme0n12.tar

As far as I understood it, this is the usual workflow:

mkdir incremental-tests && cd "$_"

# Create data to back up
mkdir foo
echo hi > foo/bar

# Do a full backup (with support for an incremental backup at a later time)
tar --listed-incremental=backup.01.snar -c -f backup.01.tar foo

# Add new data to store in the incremental backup
echo world > foo/par

# Do the incremental backup
cp backup.01.snar backup.02.snar
tar --listed-incremental=backup.02.snar -c -f backup.02.tar foo

# backup.01.tar is now a full backup which contains foo/bar
# and the incremental backup backup.02.tar will only contain foo/par
tar tvvlf backup.02.tar

And in order to mount the latest state with ratarmount, you can make use of the union merge feature by simply specifying both archives:

ratarmount --gnu-incremental backup.01.tar backup.02.tar mountpoint

ok telegram

The link above and on the main page is an invite link: https://t.me/joinchat/FUdXxkXIv6c4Ib8bgaSxNg

[dacorsa]

perfect Max! :

ratarmount -o allow_other --gnu-incremental /media/dacorsa/HDext2TB/Backup-NanoKDE/backup-sda1.tar /mnt/backup/