Boilerplate bash script

run.sh

#!/usr/bin/env bash
set -euo pipefail
IFS=$'\n\t'

#/ Usage:       
#/ Description: 
#/ Examples:    
#/ Options:     
#/   --help: Display this help message
usage() { grep '^#/' "$0" | cut -c4- ; exit 0 ; }
expr "$*" : ".*--help" > /dev/null && usage

echoerr() { printf "%s\n" "$*" >&2 ; }
info()    { echoerr "[INFO]    $*" ; }
warning() { echoerr "[WARNING] $*" ; }
error()   { echoerr "[ERROR]   $*" ; }
fatal()   { echoerr "[FATAL]   $*" ; exit 1 ; }

cleanup() {
  # Remove temporary files
  # Restart services
  info "... cleaned up"
}

if [[ "${BASH_SOURCE[0]}" = "$0" ]]; then
  trap cleanup EXIT
  # Script goes here
  info "starting script ..."
fi

Adapted from https://dev.to/thiht/shell-scripts-matter