xsrrd2dat

#!/bin/sh -e

rrd_dir="$1"
dat_dir="$2"
[ -z "${dat_dir}" ] && dat_dir="$1"

rrddump="rrddump"

function die() {
  echo $1
  exit $2
}

rrd_dir_rel="var/xapi/blobs/rrds"

dat_dir=${dat_dir/--help*}
dat_dir=${dat_dir/-h*}
: ${dat_dir:?"
usage: $0 [rrd_dir] <dat_dir>
where:
- dat_dir is the location where the .dat files will be written to
- rrd_dir is the location where the rrd files will be read from
  if rrd_dir is not provided, it will try the following default locations:
  #1) xenserver's default location at /${rrd_dir_rel}
  #2) relative path at ./${rrd_dir_rel}"
}

[ ! -d "${dat_dir}" ] && die "dat_dir not a directory: ${dat_dir}" 1
: ${rrd_dir:="/${rrd_dir_rel}"}
[ ! -d "${rrd_dir}" ] && rrd_dir="${rrd_dir_rel}"
[ ! -d "${rrd_dir}" ] && die "rrd_dir not a directory: ${rrd_dir}" 2

mkdir -p "${dat_dir}"
rgzs="$(ls -x ${rrd_dir}/*.gz | grep -v deadbeef | grep -v 00000000)"
for rgz in ${rgzs}
do
  echo "rgz=${rgz}"
  tmp="$(tempfile)"
  zcat "${rgz}" > "${tmp}"
  base=$(basename "${rgz%%.gz}")
  rgz_dir="${dat_dir}/dat-${base}"
  echo "${rgz_dir}"
  mkdir -p "${rgz_dir}"
  (cd "${rgz_dir}" && "${rrddump}" "${tmp}")
done