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

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

Check if a command is available.

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

Arguments:
    command       Command to check

Returns 0 if command exists, 1 otherwise.

EOF
    exit 0
fi

[ -n "$1" ] && command -v "$1" || exit 1