Backup a Drupal site to Amazon S3 using Drush

drush-s3cmd.sh

# arg1 : bucket
# arg2 : project path
# arg3 : backup path
# arg4 : max s3  


# Switch to the docroot.
cd $2

# Backup the database.
/usr/bin/drush sql-dump --gzip --result-file=$3/database-`date +%F-%T`.sql

# Switch to the backups directory.
cd $3

# Store the recently created db's filename as a variable.
database=$(ls -t | head -n1)

# Upload to Amazon S3, using s3cmd (https://github.com/s3tools/s3cmd).
s3cmd put $database s3://$1/$database

# Delete databases older than 10 days.
find $3 -mtime +10 -type f -delete

# remove old files from s3 .. if arg4 is set
if [[ $4 != "" ]]
  then
  # clean up s3 backups 
  s3cmd ls s3://$1/ | while read -r line;
    do
      createDate=`echo $line|awk {'print $1" "$2'}`
      createDate=`date -d"$createDate" +%s`
      olderThan=`date -d"-$4" +%s`
      if [[ $createDate -lt $olderThan ]]
        then 
          fileName=`echo $line|awk {'print $4'}`
          if [[ $fileName != "" ]]
            then
              s3cmd del "$fileName"
              echo "Deleted $fileName"
          fi
      fi
    done;
fi