`snapper list` with "#" "Date" "Type" "Pre #" "Cleanup" "Changes" "Used Space" "Description"

slistc.sh

#!/usr/bin/env bash
set -euo pipefail

if sudo btrfs quota status / | grep -q 'Inconsistent:.*yes'; then
    echo "qgroup data inconsistent -> running rescan" >&2
    sudo btrfs quota rescan -w /
fi

sudo btrfs qgroup show -reF /
echo # Leerzeile

config="${1:-root}"

columns="%-4s %-21s %-8s %-7s %-10s %7s %11s  %s\n"
printf "$columns" "#" "Date" "Type" "Pre #" "Cleanup" "Changes" "Used Space" "Description"
printf "$columns" "----" "---------------------" "--------" "-------" "----------" "-------" "-----------" "-----------"

printf "(working ...)"

prev=""

while IFS=, read -r number date type pre_number cleanup used_space description; do
    [[ -z "${number:-}" ]] && continue

    changes=""
    if [[ -n "$prev" ]]; then
        changes="$(sudo snapper -c "$config" status "${prev}..${number}" | wc -l)"
    fi

    [[ "$changes" == "0" ]] && { prev="$number"; continue; }
    # Der erste Snapshot (ohne prev) wird weiterhin ausgegeben, da changes dann leer ist.

    printf "\r\033[K$columns" \
        "$number" \
        "$date" \
        "$type" \
        "$pre_number" \
        "$cleanup" \
        "$changes" \
        "$used_space" \
        "$description"

    prev="$number"
done < <(
    sudo snapper --iso --csvout -c "$config" list \
        --columns number,date,type,pre-number,cleanup,used-space,description |
    tail -n +2
)