index.js

// entrypoint for execution
var CronJob = require('cron').CronJob;

const handler = require('./lib/handler')

module.exports.handler = handler

// remove quotes around cron schedule
var cronSchedule = process.env.CRON_SCHEDULE.replace(/["']+/g, '')

console.log("Starting backup service on cron schedule: " + cronSchedule)

const job = new CronJob(cronSchedule, function(){
  console.log('Running cron task at ' + new Date())
  // run the backup script
  handler(null, null, function(){})
}, null, true, 'America/Los_Angeles')

process.on('SIGINT', function(){
  job.stop()
  process.exit(0)
})

// run without event or context for execution outside of lambda environment
//handler(null,null,function(){})