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# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 Robin Raymond
#
# 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 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/>
{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.mailserver;
preexecDefined = cfg.backup.cmdPreexec != null;
preexecWrapped = pkgs.writeScript "rsnapshot-preexec.sh" ''
#!${pkgs.stdenv.shell}
set -e
${cfg.backup.cmdPreexec}
'';
preexecString = optionalString preexecDefined "cmd_preexec ${preexecWrapped}";
postexecDefined = cfg.backup.cmdPostexec != null;
postexecWrapped = pkgs.writeScript "rsnapshot-postexec.sh" ''
#!${pkgs.stdenv.shell}
set -e
${cfg.backup.cmdPostexec}
'';
postexecString = optionalString postexecDefined "cmd_postexec ${postexecWrapped}";
in {
config = mkIf (cfg.enable && cfg.backup.enable) {
services.rsnapshot = {
enable = true;
cronIntervals = cfg.backup.cronIntervals;
# rsnapshot expects intervals shortest first, e.g. hourly first, then daily.
# tabs must separate all elements
extraConfig = ''
${preexecString}
${postexecString}
snapshot_root ${cfg.backup.snapshotRoot}/
retain hourly ${toString cfg.backup.retain.hourly}
retain daily ${toString cfg.backup.retain.daily}
retain weekly ${toString cfg.backup.retain.weekly}
backup ${cfg.mailDirectory}/ localhost/
'';
};
};
}
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