url http://botan.randombit.net/download.html
version_link 'Botan-[0-9]+[.][0-9]*[02468]([.][0-9]+)?[.](tbz|tbz2|tar[.]bz2)$'
ensure_version
ensure_hash
do_overwrite(){
  set_var_value hash $CURRENT_HASH
  set_var_value baseVersion ${CURRENT_VERSION%.*}
  set_var_value revision ${CURRENT_VERSION##*.}
}