#!/bin/sh
set -e

dups="$(sed 's/\\$//' < icons.mk | sed '/^\s*\(#.*\|\)$/d' | sed 1d | tr -d '\t ' | sort | uniq -d)"

if test -n "$dups"; then
	printf 'The following files have been listed in icons.mk multiple times:\n%s\n' "$dups" >&2
	exit 1
fi