#!/bin/bash
# Copyright (c) 2011, Piotr Karbowski <piotr.karbowski@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification, are
# permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice, this
#   list of conditions and the following disclaimer in the documentation and/or other
#   materials provided with the distribution.
# * Neither the name of the Piotr Karbowski nor the names of its contributors may be
#   used to endorse or promote products derived from this software without specific
#   prior written permission.


baseurl='http://grsecurity.net'

curl_args='--ipv4 -s'

basename="${0##*/}"
scriptpath="$(readlink -f $0)"
workdir="${scriptpath%/${basename}}"

cd "${workdir}" || exit 1

if [ -f "${workdir}/lock" ]; then exit 2; fi
touch "${workdir}/lock"

while read line; do

	if [[ "${line}" =~ grsecurity-[0-9\.\-]+\.patch$ ]]; then
		grsecurity_files+=( "${line##*/}" )

	fi

	if [[ "${line}" =~ gradm-[0-9\.\-]+\.tar\.gz$ ]]; then
		gradm_files+=( "${line##*/}" )
	fi

done < <(curl ${curl_args} "${baseurl}/test.php" | awk -v RS='"' '!(--p){print}/href=$/{p=1}' )

# grsecurity patches.
for item in "${grsecurity_files[@]}"; do
	if ! [ -f "test/${item}" ]; then
		printf 'Downloading %s ...\n' "${item}"
		curl ${curl_args} "${baseurl}/test/${item}" > "${workdir}/test/${item}"
		printf 'Downloading %s ...\n' "${item}.sig"
		curl ${curl_args} "${baseurl}/test/${item}.sig" > "${workdir}/test/${item}.sig"
		new_grsecurity_patches+=( "${item}" )
	fi
done; unset item

date="$(date '+%d-%m-%Y %H:%M')"

# If array have at least one element.
if [ "${#new_grsecurity_patches[@]}" -gt '0' ]; then
	printf 'Downloading changelog-test.txt ...\n'
	curl ${curl_args} "${baseurl}/changelog-test.txt" > "${workdir}/test/changelog-test.txt"
	git add "${workdir}/test/" && git commit "${workdir}/test/" -m \
		"$(printf 'grsec-scrape autocommit. %s new patch(es).\n\n' "${#new_grsecurity_patches[@]}"; printf 'New patch: %s\n' "${new_grsecurity_patches[@]}" )"
	git push
fi

rm "${workdir}/lock"