Bash script template

bash-template.sh

#!/bin/bash
set -eo pipefail
IFS=$'\n\t'

readonly LOG_FILE="/tmp/$(basename "$0").log"
info()    { echo "[INFO]    $*" | tee -a "$LOG_FILE" >&2 ; }
warning() { echo "[WARNING] $*" | tee -a "$LOG_FILE" >&2 ; }
error()   { echo "[ERROR]   $*" | tee -a "$LOG_FILE" >&2 ; }
fatal()   { echo "[FATAL]   $*" | tee -a "$LOG_FILE" >&2 ; exit 1 ; }

printUsage() {
    cat << EOF
Usage:
        ${0##*/} 

This is a script!

EOF
}

cleanup() {
    # Add any script cleanup code here.
    info "Done."
}

indent() {
    sed 's/^/          /'
}

OPTIND=1
while getopts ":a:b:" opt; do
    case $opt in
        a|--along) A=$OPTARG
           ;;
        b) B=$OPTARG
           ;;
        \?)
            error "Invalid option: -$OPTARG"
            exit 1
            ;;
    esac
done
shift "$((OPTIND-1))"

if [[ "${BASH_SOURCE[0]}" = "$0" ]]; then
    trap cleanup EXIT

    # Put the script here
fi