bash exit cleanup function

gistfile1.txt

#!/usr/bin/env bash

# bash exit cleanup snippet

# By default, the shell will continue on errors (sometimes to your detriment) 
# To learn about exit status, visit http://tldp.org/LDP/abs/html/exit-status.html
# To learn about the set builtin, visit https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html
# To learn about traps, visit http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_12_02.html

# We use set -e to exit immediately if a command exits with a non-zero status.
# Note: this only checks the last command in a pipeline (see below examples).


### BEGIN CODE SNIPPET
set -e

function exit_cleanup () {
echo "running the exit cleanup function"
exit 1
}

trap 'exit_cleanup' ERR
### END CODE SNIPPET


# Assuming 'zecho' doesn't exist, experiment with this until you understand
echo "success command"
zecho "failed command with forced 0 status" || true     #continue because true exits code 0

echo "success command with forced 1 status" || false    #stop (when using set -e) because false exits code 1
zecho "failed command"

echo "got to the end of the script"