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#!/usr/bin/env bash

# Copyright (C) 2011-2012 Nicolás Reynolds <fauno@parabola.nu>
# Copyright (C) 2012 Michał Masłowski <mtjm@mtjm.eu>
# Copyright (C) 2012 Joshua Ismael Haase Hernández (xihh) <hahj87@gmail.com>
# Copyright (C) 2014-2015, 2017 Luke Shumaker <lukeshu@sbcglobal.net>
#
# License: GNU GPLv3+
#
# 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 Affero 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/>.

. "$(librelib messages)"
. "$(librelib conf)"

main() {
	setup_traps

	# TODO: better option parsing
	TORUPATH=${T:-${TORUPATH}}
	VERBOSE=${V:-false}
	FORCE=${F:-false}

	load_files libretools
	check_vars libretools TORUPATH REPOS || exit 1
	load_files abs
	check_vars abs ABSROOT || exit 1

	if [ ! -w "$TORUPATH" ]; then
		error "Toru's path isn't writable. Please check $TORUPATH"
		exit 1
	fi

	lastsyncfile=${TORUPATH}/lastsync.paths
	pathfile=${TORUPATH}/paths.tch

	if [ ! -e "${pathfile}" ]; then
		tcamgr create "${pathfile}"
	fi

	# TODO: ability to use flags to pass in other directories to fullrepos

	# This loops over ${REPOS[@]} backward.  This is because early entries
	# in REPOS have higher precidence, but the way this is implemented,
	# the later entries have precedence, so we need to flip the order.
	fullrepos=()
	for (( i = ${#REPOS[@]}-1 ; i >= 0 ; i-- )); do
		$VERBOSE && msg "Processing [%s]" "${REPOS[$i]}"

		if [ -d "${ABSROOT}/${REPOS[$i]}" ]; then
			fullrepos+=("${ABSROOT}/${REPOS[$i]}")
		fi
	done

	# Find PKGBUILDs in ${fullrepos[@]}
	find_args=("${fullrepos[@]}" -mindepth 2 -maxdepth 3 -type f -name PKGBUILD)
	if ! $FORCE && [[ -e $lastsyncfile ]]; then
		# if lastfilesync exists, only look at things that have
		# changed since then (unless $FORCE is on)
		find_args+=(-newer "${lastsyncfile}")
	fi
	IFS=$'\n'
	pkgbuilds=($(find "${find_args[@]}"))

	# Add information from each of the PKGBUILDs to the toru cache.
	msg "Updating path cache"
	msg2 "%d PKGBUILDs to update" ${#pkgbuilds[@]}
	for _pkgbuild in "${pkgbuilds[@]}"; do
		# plain "$_pkgbuild"
		if ! load_PKGBUILD "${_pkgbuild}" >/dev/null 2>&1; then
			error "%q contains errors, skipping" "${_pkgbuild}"
			continue
		fi

		fullpath="$(dirname -- "${_pkgbuild}")"

		for _pkg in "${pkgbase}" "${pkgname[@]}" "${provides[@]}"; do
			$VERBOSE && msg2 '%s -> %s' "${_pkg}" "${fullpath}"
			tcamgr put "${pathfile}" "${_pkg%%[<>=]*}" "${fullpath}"
		done
	done

	date +%s > "${lastsyncfile}"
}

main "$@"