Google Scripts Safety Pattern

/*
 * @name Google Scripts Safety Pattern
 *
 * @author Bas Baudoin
 *
 * @version v1 2022-09-24
 *
 * @instructions
 *  - add your logic to master() instead of main()
 *  - add your logs to msg() instead of console.log()
 *  - add your (custom) error messages to err()
 *  - messages, errors and execution errors will be automatically emailed
 *  - enter email address in config variable
 *  - set sendMessages true if you want to receive update mails, errs always be sent
 */

const config = {
  email: 'bas@example.com',
  sendMessages: false,
}

function master() {
  // add your script logic here
}

// --- start safety logic ---
let msgs = []
let errs = []

function main() {
  try {
    master()
  } catch(e) {
    err(`Main catch: ${e}`)
  }
  handleMessages()
}

function handleMessages() {
  const accountName = AdsApp.currentAccount().getName()
  const errBody = errs.join('\n- ')
  const errSubject = `Errors in script: ${accountName}`
  console.log(`⏩ Sending error mail to ${config.email}`)
  MailApp.sendEmail(config.email, errSubject, errBody)
  
  if (!config.sendMessages || msgs.length === 0) return console.log('⏩ Skipping sending msgs')
  const msgBody = msgs.join('\n- ')
  const msgSubject = `Script updates: ${accountName}`
  console.log(`⏩ Sending update message mail to ${config.email}`)
  MailApp.sendEmail(config.email, msgSubject, msgBody)
}

function err(errMsg) {
  console.log('❌', errMsg)
  errs.push(errMsg)
}

function msg(msg) {
  console.log('⏩', msg)
  msgs.push(msg)
}
// --- end safety logic ---