Machine-readable output of btrbk list

[Atemu]

I have a use-case where I need to determine the latest btrbk snapshot for some subvol.

I had to resort to parsing the raw format using a regex:

btrbk list --format=raw | rg "^.* snapshot_subvolume='(/.*?/snapshotnamehere\..*?)' .*$" --replace '$1' | tail -n 1

This would have been much simpler (not to mention more robust) if there was an option to output a standardised machine-readable format such as JSON.

[dkebler]

this is what I do. Does not make use of raw but btrbk custom format. Yes json would be nice.

btrbk_latest() {

local file=$(btrbk_conf $1)    
[[ ! $file ]] && echo unable to find conf file for ${1:-btrbk.conf} && return 1
shift

local latest=$(sudo btrbk -c $file list latest --format col:h:snapshot_subvolume | xargs -I % sh -c 'basename %' | sed '$!N; /^\(.*\)\n\1$/!P; D')
echo $latest

}