Sample NPM Run Script File for Watching

watch.sh

#!/bin/bash

function ctrl_c() {
  for process in "${PROCESSES[@]}"; do
    local pid=$(get_pid $process)

    if [ ! -z $pid ]; then
      kill $pid
    fi
  done

  exit 0
}

function get_pid() {
  local process=$@
  ps aux | grep "$process" | grep -v grep | awk '{ print $2 }'
}

function runner() {
  local cmd=$@
  local pid=$(get_pid $cmd)

  if [ -z $pid ]; then
    $cmd &
  fi

  PROCESSES+=("$cmd")
}

function main() {
  rm -rf dist
  npm run levels
  runner "node ./node_modules/livereload/bin/livereload.js ."
  runner "python -m SimpleHTTPServer"
  ./node_modules/rollup/bin/rollup -w -c tools/rollup-config.js
}

PROCESSES=()
trap ctrl_c INT
main