#!/bin/sh

## variables
# distant server
dist_srv='1.1.1.1'
# local directory for backups if distant srv is dead
local_bck='file:///backups'
# will the backup be local only ? (default no [0])
is_local=0
# distant directory for backups
dist_bck='\\srv-services\backup\'
# protocol for sending
srv_proto='smb'
# username if mandated
srv_user=''
# password if mandated
srv_passwd=''
HOME=$HOME


## some tests before
# (apt-get install|yum install|emerge|...) duplicity
if !(which duplicity); then
  echo 'Please install duplicity package'
  exit 1
fi
# is the distant server alive ?
if (ping -c2 -w3 $dist_srv); then
  echo 'WARNING! distant server seems to be down or unavalaible!'
  echo 'LOCAL backups only'
  echo
  is_local=1
fi

## choose correct URL for backup
#declare -i is_local
if [ $is_local -eq 0 ]; then
  case $srv_proto in
    smb)
      # for smb, we have to mount the share - duplicity doesn't seems to support it for now.
      mount -t cifs -o username=${srv_user},password=${srv_passwd} //${dist_srv}/${dist_bck} /home/backups
      url=${local_bck}
      duplicity ${HOME} ${url}
      ;;
    *)
      echo 'TO BE IMPLEMENTED'
      ;;
  esac
else
  # local backup
  rsync -r -n -t -v --progress --existing -z "$HOME" "$local_bck"
fi