Why is this resolution so complicated? Why not put this new functionality into the regular "xtrabackup" SST script instead of into a new one? Why require this sst-special-dirs variable? I don't understand why it would not be desirable for the default behavior of the normal xtrabackup SST script to support innodb_log_group_home_dir, innodb_data_home_dir, et cetera.
Why is this resolution so complicated? Why not put this new functionality into the regular "xtrabackup" SST script instead of into a new one? Why require this sst-special-dirs variable? I don't understand why it would not be desirable for the default behavior of the normal xtrabackup SST script to support innodb_ log_group_ home_dir, innodb_ data_home_ dir, et cetera.