#!/usr/bin/env bash
# https://github.com/ralish/bash-script-template

#{{{ Bash settings
# shorthand: set -euo pipefail ...
# Only enable these shell behaviours if we're not being sourced
# Approach via: https://stackoverflow.com/a/28776166/8787985
if ! (return 0 2> /dev/null); then
    # A better class of script...
    set -o errexit      # Exit on most errors (see the manual)
    set -o nounset      # Disallow expansion of unset variables
    set -o pipefail     # Use last non-zero exit code in a pipeline
fi

# Enable errtrace or the error trap handler will not work as expected
set -o errtrace         # Ensure the error trap handler is inherited
#}}}

#{{{ Variables
IFS=$'\t\n'   # Split on newlines and tabs (but not on spaces)
script_name=$(basename "${0}")
script_dir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
readonly script_name script_dir
#}}}

if [[ "${TRACE-0}" == "1" ]]; then
    set -o xtrace
fi
# Enable xtrace if the DEBUG environment variable is set
#if [[ ${DEBUG-} =~ ^1|yes|true$ ]]; then
#    set -o xtrace       # Trace the execution of the script (debug)
#fi

if [[ "${1-}" =~ ^-*h(elp)?$ ]]; then
    echo 'Usage: ./script.sh arg-one arg-two

This is an awesome bash script to make your life better.

'
    exit
fi

cd "$(dirname "$0")"

# Helper functions
cleanup() {
  result=$?
  # Your cleanup code here
  exit ${result}
}
trap cleanup EXIT ERR

main() {
    echo do awesome stuff
}

main "$@"