#!/usr/bin/env bash
set -uo pipefail

if [[ "$1" == "-h" || "$1" == "--help" ]]; then
    cat <<EOF
Usage: $(basename "$0") [-h] <command>

Retry a command until it succeeds.

Options:
    -h, --help    Show this help message

Arguments:
    command       Command to repeatedly execute

EOF
    exit 0
fi

"$@"
while [[ "$?" -ne 0 ]]; do
    sleep 0.5
    "$@"
done