#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		Usage:
		  r COMMAND...
		  r -h
	EOF
}

help() {
	cat <<-'EOF'


		Options:
		  -h, --help    show this message

		  COMMAND       the command to be executed


		Execute the given command, with a proper login environment
		loaded.


		Examples:

		  Run a backup via SSH:

		    $ ssh euandre.org r backup -q cron
	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 [ -z "${1:-}" ]; then
	printf 'Missing COMMAND.\n\n' >&2
	usage >&2
	exit 2
fi


set +eu
# shellcheck source=/dev/null
. /etc/rc
set -eu

exec "$@"