diff options
| -rw-r--r-- | README.md | 2 | ||||
| -rw-r--r-- | rsync_tmbackup.sh | 32 |
2 files changed, 32 insertions, 2 deletions
@@ -42,8 +42,6 @@ An optional exclude file can be provided as a third parameter. It should be comp * Check if there's enough space in the destination before doing the backup. Also automatically delete old backups. -* Manage the backups in a way similar to Time Machine - hourly backups for the past 24 hours; daily backups for the past month; weekly backups for the previous months. - # LICENSE [MIT](http://opensource.org/licenses/MIT) diff --git a/rsync_tmbackup.sh b/rsync_tmbackup.sh index 2364deb..100ce9f 100644 --- a/rsync_tmbackup.sh +++ b/rsync_tmbackup.sh @@ -31,6 +31,10 @@ trap 'fn_terminate_script' SIGINT # Source and destination information # ----------------------------------------------------------------------------- +fn_parse_date() { + date -d "${1:0:10} ${1:11:2}:${1:13:2}:${1:15:2}" +%s +} + SRC_FOLDER=${1%/} DEST_FOLDER=${2%/} EXCLUSION_FILE=$3 @@ -82,6 +86,8 @@ DEST=$DEST_FOLDER/$NOW LAST_TIME=$(ls -1 -- "$DEST_FOLDER" | grep "$BACKUP_FOLDER_PATTERN" | tail -n 1) PREVIOUS_DEST=$DEST_FOLDER/$LAST_TIME INPROGRESS_FILE=$DEST_FOLDER/backup.inprogress +KEEP_ALL_DATE=$(date -d '-1 day' +%s) +KEEP_DAILIES_DATE=$(date -d '-1 month' +%s) # ----------------------------------------------------------------------------- # Create profile folder if it doesn't exist @@ -141,6 +147,32 @@ while [ "1" ]; do fi # ----------------------------------------------------------------------------- + # Purge certain old backups before beginning new backup. + # ----------------------------------------------------------------------------- + + for date in $(ls -1 -- "$DEST_FOLDER" | grep "$BACKUP_FOLDER_PATTERN" | sort -r); do + stamp=$(fn_parse_date $date) + + # Skip if failed to parse date... + [ -n "$stamp" ] || continue + + if [ $stamp -ge $KEEP_ALL_DATE ]; then + true + + elif [ $stamp -ge $KEEP_DAILIES_DATE ]; then + # Delete all but the most recent of each day. + [ ${date:8:2} -eq ${prev:8:2} ] && echo rm -rf $DEST_FOLDER/$date + + else + # Delete all but the most recent of each month. + [ ${date:5:2} -eq ${prev:5:2} ] && echo rm -rf $DEST_FOLDER/$date + fi + + prev=$date + done + + + # ----------------------------------------------------------------------------- # Start backup # ----------------------------------------------------------------------------- |