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#!/bin/bash

# Copyright (C) 2012-2013 Luke Shumaker <lukeshu@sbcglobal.net>
#
# License: GNU GPLv2+
#
# 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/>.

# Here's the idea:
# We have two sources of abslibre:
#  - git    - does not include packages imported directly from Arch Linux
#  - rsync  - is read-only
# They should be identical, except for the mentioned differences.
#

status() {
	[[ -z $(git status -s .) ]]
}

download() {
	. $(librelib conf)
	load_files libretools
	check_vars libretools WORKDIR ABSLIBRERECV || return 1

	# Get the Parabola-added git repo
	libregit "$ABSLIBRERECV" master "$WORKDIR/abslibre" || return 1
	# This bit configures a 'pushUrl' to use ssh, leaves plain https for
	# 'url' (used for fetch).
	if [[ -n ${ABSLIBRESEND:-} ]]; then
		pushd "$WORKDIR/abslibre" >/dev/null
		local pushUrl="$(git config --get remote.origin.pushUrl)"
		if [[ $? != 0 ]]; then
			git config remote.origin.pushUrl "$ABSLIBRESEND";
		elif [[ $pushUrl != "$ABSLIBRESEND" ]]; then
			warning "A %s is configured for %s, but it doesn't match %s" pushUrl "$WORKDIR/abslibre" "$ABSLIBRESEND"
		fi
		popd >/dev/null
	fi

	# Get the everything-included tree
	abs
}

release() {
	local repo=$1
	local arch=$2

	. libremessages
	. $(librelib conf)
	load_files libretools
	check_vars libretools WORKDIR || return 1
	local lookupfile="${WORKDIR}/abslibre.xbs-lookup"

	read mode type sha1 file <<<"$(git ls-tree -d --full-tree HEAD "$(pwd)")"

	lock 9 "$lookupfile.lock" "Waiting for lock on %s" "$lookupfile"
	{
		sed "/^$repo $arch $pkgbase /d" < "$lookupfile"
		echo "$repo $arch $pkgbase $sha1 $path"
	} > "$lookupfile.$$"
	mv "$lookupfile.$$" "$lookupfile"
	lock_close 9
}

unrelease() {
	local pkgbase=$1
	local repo=$2
	local arch=$3

	. libremessages
	. $(librelib conf)
	load_files libretools
	check_vars libretools WORKDIR || return 1
	local lookupfile="${WORKDIR}/abslibre.xbs-lookup"

	lock 9 "$lookupfile.lock" "Waiting for lock on %s" "$lookupfile"
	sed -i "/^$repo $arch $pkgbase /d" "$lookupfile"
	lock_close 9
}

move() {
	local repo_from=$1
	local repo_to=$2
	local pkgbase=$3

	. libremessages
	. $(librelib conf)
	load_files libretools
	check_vars libretools WORKDIR || return 1
	local lookupfile="${WORKDIR}/abslibre.xbs-lookup"

	lock 9 "$lookupfile.lock" "Waiting for lock on %s" "$lookupfile"
	sed -ri "s/^${repo_from} (\S+) $pkgbase /${repo_to} \1 $pkgbase/" "$lookupfile"
	# TODO
	lock_close 9
	return 1
}

releasepath() {
	local pkgbase=$1
	local repo=$2
	local arch=$3

	local r=0
	. $(librelib conf)
	load_files libretools
	check_vars libretools WORKDIR || r=$?
	load_files abs
	check_vars abs ABSROOT || r=$?

	local abstree
	local dir
	for abstree in "$WORKDIR/abslibre" "$ABSROOT"; do
		dir="$abstree/$repo/$pkgbase"
		if [[ -f "$dir/PKGBUILD" ]]; then
			printf '%s\n' "$dir"
			return 0
		fi
	done
	return 1
}

case "$1" in
	status|download|release|unrelease|move|releasepath) "$@";;
	*) exit 127;;
esac