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#!/bin/bash
set -e
# source folder to back up, don't forget to add trailing slash
: ${BACKUPSOURCE:="/home/jodersky/"}
# backup root folder, i.e. the one that will contain all backups in separate sub-folders
: ${BACKUPCAPSULE:="/mnt/backup/backup/"}
#destination folder to back up to
destination="$BACKUPCAPSULE"/$(date +%Y-%m-%d_%H-%M-%S)
#symbolic link to latest backup (if any)
latest="$BACKUPCAPSULE/latest"
# rsync options
roptions=(
-a
-P
--copy-unsafe-links
--delete
--delete-excluded
--filter=": .rsyncignore"
)
# settings that are passed through arguments
init=0; # initialise new backup
dryrun=0; # perform a simulated run, don't backup any files
# process arguments
while [ $# -gt 0 ]
do
if [ "$1" = "--init" ]; then
init=1
elif [ "$1" = "-n" ]; then
dryrun=1
else
echo "invalid argument: $1"
exit 1
fi
shift
done
if [ $init -eq 0 ]; then
roptions+=(--link-dest="$latest")
fi
if [ $dryrun -eq 1 ]; then
roptions+=(-n)
roptions+=(-vv)
fi
rsync "${roptions[@]}" "$BACKUPSOURCE" "$destination"
if [ $dryrun -eq 0 ]; then
rm -f $latest
ln -s "$destination" "$latest"
fi
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