Create a rangeset out of a list of integer (used within clustershell, slurm.conf, ...).

create_rangeset.sh

function create_rangeset {
   # consumes a list of integers and creates a rangeset
   ####
   # $ create_rangeset 0 1 2  5 6 {10..50}
   # 0-2,5-6,10-50

   RSET=""
   CNT="-1"
   PREV_CNT="-1"
   for INT in $*;do
      if [ ${CNT} -ne ${INT} ];then
         if [ ${CNT} -eq -1 ];then
             CNT=0
         fi
         if [ "X${RSET}" != "X" ];then
             RSET="${RSET}-${PREV_CNT},"
         fi
         CNT=${INT}
         RSET="${RSET}${CNT}"
      fi
      PREV_CNT=${CNT}
      CNT=$(echo "${CNT} + 1"|bc)
   done
   RSET="${RSET}-${PREV_CNT}"
   echo ${RSET}
}