#!/bin/bash
# Updater-ng configuration lists generating script
# (C) 2018-2020 CZ.NIC, z.s.p.o.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
set -e

src_dir="$(dirname "$(readlink -f "$0")")"
. "$src_dir/helpers/common.sh"
. "$src_dir/helpers/generate_common.sh"

output_path=
sign_key=
while [ $# -gt 0 ]; do
	case "$1" in
		-h|--help)
			echo "This script generates updater-ng configuration lists from Turris OS build repository."
			echo "Usage: $0 [OPTION]... [OUTPUT_PATH]"
			echo
			echo "Options:"
			echo "  --help, -h"
			echo "    Prints this help text."
			echo "  --sign KEY"
			echo "    Sign lists with given KEY and usign utility"
			echo "  --debug"
			echo "    Run this script in debug mode"
			exit
			;;
		--sign)
			shift
			sign_key="$1"
			;;
		--debug)
			set -x
			;;
		*)
			if [ -z "$output_path" ]; then
				output_path="$1"
			else
				echo "Unknown option: $1"
				exit 1
			fi
			;;
	esac
	shift
done
[ -n "$output_path" ] || output_path="generated_lists"

[ -d "$src_dir/lists" -a -f "$src_dir/feeds.conf" ] || \
	die "This script has to be in the same direstory as feeds.conf and lists directory."

rm -rf "$output_path"
mkdir -p "$output_path"

"$src_dir/helpers/turris-version.sh" version > "$output_path/turris-version"
( cd "$src_dir" && git rev-parse HEAD > "$output_path/git-hash" )

lists_dir="$src_dir/lists"
m4args=( "--include=$lists_dir" "-D_INCLUDE_=$lists_dir/" "-D_FEEDS_=$src_dir/feeds.conf" )
m4args+=( "-D_TURRIS_OS_VERSION_=$("${0%/*}/helpers/turris-version.sh" version)" )

find "$lists_dir" -name '*.lua.m4' -print0 | while read -r -d '' f; do
	output="$output_path/${f##$lists_dir/}"
	mkdir -p "${output%/*}"
	m4 "${m4args[@]}" "$f" > "${output%.m4}"
done
find "$lists_dir" -name '*.lua' -print0 | while read -r -d '' f; do
	output="$output_path/${f##$lists_dir/}"
	mkdir -p "${output%/*}"
	cp "$f" "${output}"
done

if [ -n "$sign_key" ]; then
	get_usign
	find "$output_path" -name '*.lua' -print0 | while read -r -d '' f; do
		"$USIGN" -S -m "$f" -s "$sign_key"
	done
fi