#!/bin/bash

is_empty () {
  _o=`rrdtool xport DEF:A=/var/lib/collectd/rrd/$(hostname -f)/$1:value:AVERAGE XPORT:A -s -1day -m10 | xmllint --xpath 'string(xport/data/row)' -`
  if [ $? != 0 ] ; then
    echo "Error. exiting."
    exit
  fi
  if  [ "$_o" == "0.0000000000e+00" -o "$_o" == "NaN" ] ;then
    echo "$1 is empty"
    return 1
  fi
  return 0
}

cd /var/lib/collectd/rrd/$(hostname -f)
rm -rf gauge-* derive-*

if [ ! -d statsd ] ; then
  echo "No statsd directory"
  exit
fi

for f in statsd/* ; do #gauge-bts.0* statsd/*msc.0* statsd/*vlr.0*; do
  echo "Checking $f"
  is_empty $f
  if [ $? == 1 ] ; then continue ; fi
  mkdir $(basename $f .rrd)
  cd $(basename $f .rrd)
  ln -s ../$f .
  cd ..
done