Convert a dnsmasq config file's DHCP entries into Mikrotik RouterOS format (v1)

dnsmasq2mikrotik.sh

#!/bin/bash

if [[ $# -lt 1 ]]; then
  echo "ERROR: Need a filename. The file should contain dnsmasq configuration"
  exit $#
fi

hosts=`cat $1 | grep dhcp-host | grep -v "#"`


#Set the field separator to new line
IFS=$'\n'

# Typical line:
# dhcp-host=00:11:22:33:44:55,hostname,10.240.0.100,15m[,optional-net-name]
REGEX="^dhcp-host=([a-f0-9:]+),([^,]+),([0-9.]+),([0-9]+[a-z]),?(\S*)?"

for host in $hosts
do
  # https://stackoverflow.com/questions/1891797/capturing-groups-from-a-grep-regex
  if [[ $host =~ $REGEX ]]
  then
    mac="${BASH_REMATCH[1]}"
    hostname="${BASH_REMATCH[2]}"
    ip="${BASH_REMATCH[3]}"
    ttl="${BASH_REMATCH[4]}"
    netname="${BASH_REMATCH[5]}"

    # output in mikrotik format; first, the static dhcp entry:
    echo /ip/dhcp-server/lease/add mac-address=${mac} comment=${hostname} address=${ip} lease-time=${ttl}

    # and then, a static DNS entry:
    echo /ip/dns/static/add name=${hostname} address=${ip} ttl=${ttl} 

  else
      echo "$host doesn't match" >&2 # this could get noisy if there are a lot of non-matching lines
  fi
done