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#!/bin/bash -euE

#   Copyright (c) 2012-2013 Pacman Development Team <pacman-dev@archlinux.org>
#   Copyright (c) 2012-2013 Luke Shumaker <lukeshu@sbcglobal.net>
#
#   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 2 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/>.

. libremessages
. $(librelib conf.sh)

cmd=${0##*/}
usage() {
	echo "Usage: $cmd [-h]"
	echo 'Downloads or updates the PBS tree.'
	echo ''
	echo 'Options:'
	echo '  -h            Show this message'
}

load_configuration() {
	r=0

	load_files libretools
	check_vars libretools WORKDIR || r=$?

	load_files pbs
	check_vars pbs PBSGIT || r=$?

	if [[ $r -gt 0 ]]; then
		return $r
	fi
}

# Downloads/updates git based on $dir, $repo, and $ref
# Mostly taken from makepkg
download_git() {
	if [[ ! -d "$dir/.git" ]] ; then
		msg2 "$(gettext "Cloning %s %s repo...")" "${repo}" "git"
		if ! git clone "$repo" "$dir"; then
			error "$(gettext "Failure while downloading %s %s repo")" "${repo}" "git"
			plain "$(gettext "Aborting...")"
			exit 1
		fi
	else
		cd "$dir"
		# Make sure we are fetching the right repo
		if [[ "$repo" != "$(git config --get remote.origin.url)"  ]] ; then
			error "$(gettext "%s is not a clone of %s")" "$dir" "$repo"
			plain "$(gettext "Aborting...")"
			exit 1
		fi
		msg2 "$(gettext "Updating %s %s repo...")" "${repo}" "git"
		if ! git pull origin "$ref"; then
			# only warn on failure to allow offline builds
			warning "$(gettext "Failure while updating %s %s repo")" "${repo}" "git"
		fi
	fi
}

main() {
	while getopts 'h' arg; do
		case $arg in
			h) usage; return 0;;
			*) usage >&2; return 1;;
		esac
	done
	if [[ $# -gt 0 ]]; then
		usage >&2
		return 1
	fi

	load_configuration

	mkdir -p "$WORKDIR"
	(
		dir="$WORKDIR/pbs"
		repo="$PBSGIT"
		ref="master"
		download_git
	)
	cd "$WORKDIR/pbs"
	git submodule init
	git submodule update
}

main "$@"