Catching and throwing errors in bash

bash_trap_example.sh

#!/usr/bin/env bash

###### ERROR TRAP - DONT WRITE OTHER COMMANDS BEFORE THIS  ############
set -eEx
function HANDLE_ERROR() {
  echo "SCRIPT FAILED"
  echo "FAILED AT: $(caller)"
  # Do any other commands here
  exit 1
}

# Install trap
trap 'HANDLE_ERROR' ERR
########################## ERROR TRAP #################################

do_something() {
  # Throw err example:
  if myCmdFails then HANDLE_ERROR fi
}

do_something_else() {
  myOtherCmd
  # if this cmd fails, trap will catch it automatically
}