#!/usr/bin/env bash

## Create a mirror of my home directory on each of my external drives.
##
## Usage: mirror
##
## Dependencies: GNU coreutils, GNU grep, GNU sed, rsync
##
## I like to have a mirror of my home directory on each of my external drives
## because my main backup script uses a whitelist of sources (to avoid unwanted
## files in my backups) and there's always a chance I'll fail to add something
## important to the whilelist.

set -euo pipefail
shopt -s inherit_errexit

die() { echo -e "$(basename "$0"): $1" >&2; exit 1; }

[[ " $* " =~ ' --help ' ]] && sed -n 's/^## *//p' "$0" && exit
(( UID != 0 )) || die 'do not run as root'