optarg.sh

#!/usr/bin/env bash

valid_phases=("pre" "controlplane" "postcontrolplane" "nodescaleup" "migrations" "metrics" "logging" "post")
function phase_is_valid () {
    for e in "${valid_phases[@]}"; do
        [[ "$e" == "$1" ]] && return 0;
    done
    return 1
}

function phase_is_valid_fixed () {
    for e in "${valid_phases[@]}"; do
        [[ "$e" == "$@" ]] && return 0;
    done
    return 1
}

OPTARG="pre controlplane"

echo "Testing $OPTARG"

phase_is_valid $OPTARG && echo "worked" || echo "failed"
phase_is_valid_fixed $OPTARG && echo "worked" || echo "failed"

OPTARG="pre"

echo "Testing $OPTARG"

phase_is_valid $OPTARG && echo "worked" || echo "failed"
phase_is_valid_fixed $OPTARG && echo "worked" || echo "failed"