#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		Usage:
		  deploy
		  deploy -h
	EOF
}

help() {
	cat <<-'EOF'


		Options:
		  -h, --help    show this message


		Do a blue/green deployment of the main service.  It makes sure
		that the new service is up and running before shutting down the
		old one.


		Examples:

		  Just do the deploy:

		    $ deploy
	EOF
}


for flag in "$@"; do
	case "$flag" in
		--)
			break
			;;
		--help)
			usage
			help
			exit
			;;
		*)
			;;
	esac
done

while getopts 'h' flag; do
	case "$flag" in
		h)
			usage
			help
			exit
			;;
		*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))


if [ "$(id -un)" != 'root' ]; then
	printf 'This script must be run as root.\n\n' >&2
	usage >&2
	exit 2
fi


echo FIXME