Linux shell/Skeletons
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Option based
#!/usr/bin/env bash set -o pipefail set -o nounset set -o errexit err_report() { echo "Exited with error on line $1" } trap 'err_report $LINENO' ERR IFS=$'\n\t' function print_help { echo "usage: $0 [options] <arg1>" echo "Bootstraps an instance into an EKS cluster" echo "" echo "-h,--help print this help" echo "--option1-max Sets max XX (default: true)" } POSITIONAL=() while [[ $# -gt 0 ]]; do key="$1" case $key in -h|--help) print_help exit 1 ;; --option1-max) OPTION1_MAX="$2" shift; shift ;; *) # unknown option POSITIONAL+=("$1") # save it in an array for later shift # past argument ;; esac done set +u set -- "${POSITIONAL[@]}" # restore positional parameters ARG1="$1" # positional argument 1 set -u # Defaults OPTION1_MAX="${OPTION1_MAX:-true}" # Functions function get_ready () { local ready="$1" } # Main true