Script for backing up folders using rsync with recycle bin folder and delayed deletion of deleted files.

rsync_awdd.sh

#!/bin/bash

# Rsync archive with delaying deletion
# Sample command: rsync_awdd.sh -s /home/kaspim -d /mnt/backup/home/kaspim -t /mnt/backup/trash/kaspim -a 90

while [ ! $# -eq 0 ]
do
  case $1 in
    --help | -h)
      echo "rsync_awdd.sh"
      echo "  -s,  --source       Backup source folder"
      echo "  -d,  --destination  Backup destination folder"
      echo "  -t,  --trash        Trash folder for deleted files"
      echo "  -a,  --archive      Number of days to keep deleted files"
      echo "  -l,  --log          Log file"
      exit
      ;;
    --source | -s)
      shift
      source=$(realpath -s $1)
      shift
      ;;
    --destination | -d)
      shift
      destination=$(realpath -s $1)
      shift
      ;;
    --trash | -t)
      shift
      trash=$(realpath -s $1)
      shift
      ;;
    --archive | -a)
      shift
      archive=$1
      shift
      ;;
    --log | -l)
      shift
      log=$1
      shift
      ;;
  esac
done

if [[ ! -d ${source} ]]; then
  echo "Source folder does not exist." | tee -a ${log:-"backup.log"}
  exit
fi

if [[ ! -d ${destination} ]]; then
  echo "Destination folder does not exist." | tee -a ${log:-"backup.log"}
  exit
fi

if [[ ! -d ${trash} ]]; then
  echo "Trash folder does not exist." | tee -a ${log:-"backup.log"}
  exit
fi

if [[ ${trash} == *${source}* || ${trash} == *${destination}* ]]; then
  echo "Trash folder cannot be part of the source or destination folders." | tee -a ${log:-"backup.log"}
  exit
fi

rsync -avr "${source}/" "${destination}/" | tee -a ${log:-"backup.log"}

while read i; do
  if [[ ! -z ${i} ]]; then
    path=$(dirname "${trash}/${i}")
    mkdir -p "${path}"
    if [[ ! -d "${path}" ]]; then
      echo "Failed to create directory structure \"${path}\" in trash folder. The script was stopped to prevent data loss." | tee -a ${log:-"backup.log"}
      exit
    fi
    mv -f "${destination}/${i}" "${trash}/${i}" | tee -a ${log:-"backup.log"}
    touch "${trash}/${i}" | tee -a ${log:-"backup.log"}
  fi
done <<< $(rsync -avr --delete --dry-run "${source}/" "${destination}/" | grep deleting | cut -d " " -f2-)

find "${trash}/"* -mtime +${archive:-30} -type f -delete
find "${trash}/"* -type d -empty -delete