#!/bin/sh

type=$1
args=

secret_key=1234ABCD
bucket=yourbucketname

cd_dev=ATA:1,0,0
cd_mnt=/mnt/cdrom
image_dir=/path/to/backup_image
iso_file=/path/to/backup.iso

case "$type" in
  full)
    args="-b $bucket --full"
    ;;
  inc | incremental)
    args="-b $bucket --incremental_from_full"
    ;;
  cd)
    mkdir -p $image_dir || exit 1
    args="-d $image_dir --full"
    ;;
  *)
    echo "Usage $0 {full|inc|cd}"
    exit 1
    ;;
esac

function fail() {
  echo "process exited with $?" >&2
  exit 1
}

./backup.rb $args -n bok -g $secret_key \
  --exclude '/path/to/exclude/*' \
  --exclude '/another/path/to/exclude/*' \
  --exclude '/file/to/exclude' \
  /etc \
  /usr/local \
  /var/backups \
  /var/lib/dpkg \
  /home \
  /root \
  /var/spool/cron \
  /boot/grub || fail

if [[ "$type" == 'cd' ]]; then
  gpg --export-secret-key $secret_key >$image_dir/key || fail
  gpg_file=$image_dir/backup_*.tar.gpg
  md5sum=$(md5sum $gpg_file | tee $gpg_file.md5 | awk '{ print $1 }')
  mkisofs -r -l -J -o $iso_file $image_dir || fail
  rm $image_dir/*

  echo "Generated a $(ls -lh $iso_file | awk '{print $5}') image."
  echo "Insert a CD-RW disk and press Enter."
  read foo
  cdrecord -v -tao -dev=$cd_dev speed=4 blank=fast $iso_file || fail
  rm $iso_file

  echo "Checking md5sum of file on CD..."
  mount $cd_mnt || fail
  new_md5sum=$(md5sum $cd_mnt/backup_*.tar.gpg | awk '{ print $1 }')
  if test "$new_md5sum" != "$md5sum"; then
    echo "md5sums don't match (wanted "$md5sum"; got "$new_md5sum")!"
    fail
  fi
  umount $cd_mnt || fail

  echo "All done!"
  eject
fi