Bash best practices

the_best_ba.sh

#!/usr/bin/env bash

set -Eeuxo pipefail

set -o errexit
set -o nounset
set -o pipefail

trap "echo ERR trap fired!" ERR

if [[ "${TRACE-0}" == "1" ]]; then
    set -o xtrace
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")"

main() {
    echo do awesome stuff
}

main "$@"


# When you want to access a variable that may or may not have been set, use "${VARNAME-}" instead of "$VARNAME", and you’re good.

# Sources:
# https://sharats.me/posts/shell-script-best-practices/
# https://vaneyckt.io/posts/safer_bash_scripts_with_set_euxo_pipefail/
# https://betterdev.blog/minimal-safe-bash-script-template/
# https://ashishb.net/all/the-first-two-statements-of-your-bash-script-should-be/
# https://dev.to/bobbyiliev/the-only-bash-scripting-cheat-sheet-that-you-will-ever-need-55c7
#