poormans live-reload, or whatever, over and over and over

run-every

#!/usr/bin/env bash

# This is a gist
# https://gist.github.com/ginkgomzd/050d1452709d5a7cddbd802e0c8087a3

run-every() {

  boldtxt=$(tput bold)
  normaltxt=$(tput sgr0)

  if [ "$#" -eq '0' ]; then
    cat << HELPTXT
${boldtxt}NAME${normaltxt}
  Run-Every - run a command indefinitely, sleeping after each run.

${boldtxt}SYNOPSIS${normaltxt}
  run-every <script> [<sleep-time>]

${boldtxt}DESCRIPTION${normaltxt}
  Executes a loop calling the passed argument and sleeping at the end of each loop.

  Default sleep-time is 5.
  See sleep man-page for time unit specifications (smhd). Default unit is seconds.

  Scripts needing sudo should use non-interactive (-n). Script will offer to authenticate
  before initiating looping.

${boldtxt}EXAMPLE${normaltxt}
  $> run-every ./my-sync-cmd 30s
HELPTXT
    return
  fi

  if [ ! -f $1 ]; then
    echo "Could not find: $1"
    return $?
  fi
  if [ ! -x $1 ]; then
    echo "Please grant execute permissions on: $1"
    return 1
  fi
  echo "Confirmed command: $1"
  echo "All command output will be surpressed."

  echo "It is recommended that scripts should run sudo non-interactive (-n)."
  echo "Would you like to authenticate to sudo? [Y/n]"
  read user
  if [ "$user" == 'Y' ]; then
     sudo pwd >/dev/null
  fi

  if [ -z $2 ]; then
    INTERVAL='5s'
  else
    INTERVAL=$2
  fi

  echo -n "Looping every $INTERVAL:"

  while :
  do
    "$1" >/dev/null
    echo -n .
    sleep $INTERVAL
  done
}

run-every $@