Script to remove old backup files made with duplicity

backup-duplicity-remove.sh

#!/bin/bash
#
# Script to remove old backup files made with duplicity.
#
# See the `duplicity` home page for more information:
# http://duplicity.nongnu.org
#
# Author: (2014) Mariano Ruiz <[email protected]>
#

# List of source folders to backup.
# Each path must be quoted, and separated each other
# with a white space
FOLDERS=("$HOME/Desktop" "$HOME/Documents" "$HOME/Music")

# Destination folder (can be a remote address).
# The protocol must be specified, even it's a
# local path. Supported protocols:
# file:// (local), ftp://, sftp:// and scp://
# See: http://duplicity.nongnu.org
DESTINATION="file:///backup"

# Time after backups are deleted
TIME_LIMIT="15D"

# Duplicity command line options
DUPLICITY_OPTS="remove-older-than $TIME_LIMIT --force"

# Log file
LOG="$HOME/backup-duplicity.log"

# Date format printed into the log
DATE_FORMAT="+%Y-%m-%d %T"

echo "`date "$DATE_FORMAT"` INFO  : Starting to remove old system backup files ... " 2>&1 | tee -a $LOG

T_START=$(date +%s)  # To calculate the process time
EXIT_CODE=0
for f in "${FOLDERS[@]}"; do
	BASE_NAME=`basename "$f"`
	FULL_NAME="$DESTINATION/$BASE_NAME"
	echo "`date "$DATE_FORMAT"` INFO  : Removing old backups ($TIME_LIMIT) of '$BASE_NAME'" 2>&1 | tee -a $LOG
	duplicity $1 $DUPLICITY_OPTS "$FULL_NAME" 2>&1 | tee -a $LOG
	EXIT_CODE=$(( (${PIPESTATUS[0]}) + ($EXIT_CODE) ))
done
T_DIFF=$(( $(date +%s) - $T_START ))

if [ "$EXIT_CODE" != "0" ]; then
	echo "`date "$DATE_FORMAT"` ERROR : ... Removing old system backup files done with errors (elapsed time `date -u -d @"$T_DIFF" +'%-Hh %-Mm %-Ss'`). Check the log above." 2>&1 | tee -a $LOG
	exit -1
fi

echo "`date "$DATE_FORMAT"` INFO  : ... Removing old system backup files done in `date -u -d @"$T_DIFF" +'%-Hh %-Mm %-Ss'`." 2>&1 | tee -a $LOG
exit 0