`watch` with diff/logging

dwatch

#!/usr/bin/env bash

LAST_OUTPUT=""

echo > dwatch.log

while true ; do
  result="$(monit summary)"

  if [ "${result}" != "${LAST_OUTPUT}" ] ; then
    compare=$(diff <(echo "${LAST_OUTPUT}") <(echo "${result}"))
    message="
$(date)

${compare}
"

    echo "${message}
$(cat dwatch.log)" > dwatch.log

    clear
    echo "${result}

Last change...
${message}
"

    LAST_OUTPUT="${result}"
  fi

  sleep 1
done