57 lines
1.7 KiB
Bash
57 lines
1.7 KiB
Bash
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#!/bin/bash
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thisyear=$(date +%Y)
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lastyear=$(date +%Y -d "last year")
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thismonth=$(date +%m)
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lastmonth=$(date +%m -d "last month")
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backupdir=${1}
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if ! [[ -d ${backupdir} ]]; then
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echo "Usage: ${0} <backup directory>"
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echo "Example: ${0} /opt/mariadb_backup/backups/"
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exit 1
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fi
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cd "${backupdir}"
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# We want to keep:
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# * one backup per year for a year that is not this
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# * one backup per month of this year that is not current month
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# * one backup per day of current month
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for year in $(ls -d 20*/ | sed 's_/$__'); do
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# If it is not this year
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if [[ "${year}" != "${thisyear}" ]]; then
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# We loop jan - nov
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for month in $(seq -w 1 11); do
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if [[ -d "${year}/${month}" ]]; then
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rm -r "${year}/${month}"
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fi
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done
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# If current month is january and we are dealing with last year we skip it
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if ! ([[ "${thismonth}" == "01" ]] && [[ "${year}" == "${lastyear}" ]]); then
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for day in $(seq -w 1 30); do
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if [[ -d "${year}/12/${day}" ]]; then
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rm -r "${year}/12/$day"
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fi
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done
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fi
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else
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# This means it is this year
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# so we loop each month of this year
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for month in $(ls -d ${year}/* | sed "s_${year}/__"); do
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nexttolastdayoflastmonth=$(date -d "${year}-${month}-01 + 1 month - 2 day" +"%d")
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# If it is not the current month, we delete all days except the last
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# unless it is january, because then we keep the days around untill february
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if [[ "${month}" != "${thismonth}" ]]; then
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for day in $(seq -w 1 ${nexttolastdayoflastmonth}); do
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if [[ -d "${year}/${month}/${day}" ]]; then
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rm -r "${year}/${month}/${day}/"
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fi
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done
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fi
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done
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fi
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done
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# Finally we remove any empty directories
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find "${backupdir}" -type d -empty -delete
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