#!/bin/bash
#
# Delete files older than some time
#

usage()
{
cat << EOF

usage $0 options

OPTIONS
  -p path
  -n name regex
  -u unit of time

Example: ./clean-backups.sh -p /Users/foo/websites/backup/files -n '*.sql.gz' -u 30d

-n : True if the last component of the pathname being examined matches pattern

-u : Possible units of time:
 s       second
 m       minute (60 seconds)
 h       hour (60 minutes)
 d       day (24 hours)
 w       week (7 days)
 Any number of units may be combined in one argument, for example, "1h30m".

EOF
}

path=''
unitoftime=''
regex='*.sql.gz'

if [ $# -eq 0 ];
then
  usage
  exit 1
fi

while getopts "hp:n:u:" opt
do
  case $opt in
  h)
    usage
    exit 1
    ;;
  p)
    echo "Path : $OPTARG"
    path=$OPTARG
    ;;
  n)
    echo "Name Regex : $OPTARG"
    regex=$OPTARG
    ;;
  u)
    echo "Unit of Time : $OPTARG"
    unitoftime=$OPTARG
    ;;
  \?)
    echo "Invalid option: $OPTARG" >&2
    usage
    exit 1
    ;;
  :)
    echo "Option -$OPTARG requires an argument." >&2
    usage
    exit 1
    ;;
  esac
done

if [ ! -z $path ] && [ ! -z $regex ] && [ ! -z $unitoftime ];
then
  if [ ! -d $path ]
  then
    echo "Directory Not Found!!!"
    exit 1
  fi
  log=$(date +"%d-%m-%Y-%H-%M-%S")_backup_files_deleted.log;
  echo "find ${path} -type f -name ${regex} -Btime +${unitoftime}"
  find ${path} -type f -name ${regex} -Btime +${unitoftime} > $path/$log
  find ${path} -type f -name ${regex} -Btime +${unitoftime} -exec rm {} \;
  echo "Cleaned the backups..!"
  exit 0
fi