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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 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)"
setup_traps

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

. "$(librelib conf)"
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]}"

	# ABSROOT has trailing slash
	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}"