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#!/usr/bin/env bash
#
# source - functions acting on the source host.
#
# Copyright 2015 - 2019 Einhard Leichtfuß
#
# This file is part of rsync-backup.
#
# rsync-backup is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# rsync-backup 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 Affero General Public License
# along with rsync-backup. If not, see <https://www.gnu.org/licenses/>.
#
# Set up a new local mirror file tree on the source.
#
# requires: assert_is_dir, create_dir, replace_symlink,
# $src_path, $src_mirror_reldir,
# $RSYNC, ${rsync_args[@]}, ${filter_args[@]},
# $DATEFMT,
#
function src_prepare
{
local mirrors_dir="${src_path}/${src_mirror_reldir}"
local old_mirror="${mirrors_dir}/old"
local new_mirror="${mirrors_dir}/new"
local tmp_mirror="${mirrors_dir}/tmp"
local bakdate
assert_is_dir "$src_path" || return $?
message 'Create mirror of the source tree...'
if [[ ! -d "$mirrors_dir" ]]
then
create_dir "$mirrors_dir" || return $?
create_dir "$tmp_mirror" || return $?
ln -s 'none' "$old_mirror" || return $RET_ERROR
else
replace_symlink "$new_mirror" "$old_mirror" || return $?
create_dir "$tmp_mirror" || return $?
fi
"$RSYNC" \
--exclude="/${src_mirror_reldir}/***" \
"${rsync_args[@]}" \
"${filter_args[@]}" \
--link-dest="$src_path" \
"${src_path}/" "$tmp_mirror" || return $RET_ERROR
bakdate=`date +"$DATEFMT"`
mv "$tmp_mirror" "${mirrors_dir}/${bakdate}" || return $RET_ERROR
ln -s "$bakdate" "$new_mirror" || return $RET_ERROR
message 'Finished creating mirror of the source tree.'
return $RET_SUCCESS
}
# vi: ft=bash ts=2 sw=2 noet
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