68 lines
2 KiB
Nix
68 lines
2 KiB
Nix
# nixos-mailserver: a simple mail server
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# Copyright (C) 2016-2018 Robin Raymond
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>
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{
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config,
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pkgs,
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lib,
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...
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}:
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let
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inherit (lib)
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optionalString
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mkIf
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;
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cfg = config.mailserver;
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preexecDefined = cfg.backup.cmdPreexec != null;
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preexecWrapped = pkgs.writeScript "rsnapshot-preexec.sh" ''
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#!${pkgs.stdenv.shell}
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set -e
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${cfg.backup.cmdPreexec}
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'';
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preexecString = optionalString preexecDefined "cmd_preexec ${preexecWrapped}";
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postexecDefined = cfg.backup.cmdPostexec != null;
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postexecWrapped = pkgs.writeScript "rsnapshot-postexec.sh" ''
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#!${pkgs.stdenv.shell}
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set -e
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${cfg.backup.cmdPostexec}
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'';
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postexecString = optionalString postexecDefined "cmd_postexec ${postexecWrapped}";
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in
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{
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config = mkIf (cfg.enable && cfg.backup.enable) {
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services.rsnapshot = {
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enable = true;
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cronIntervals = cfg.backup.cronIntervals;
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# rsnapshot expects intervals shortest first, e.g. hourly first, then daily.
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# tabs must separate all elements
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extraConfig = ''
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${preexecString}
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${postexecString}
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snapshot_root ${cfg.backup.snapshotRoot}/
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retain hourly ${toString cfg.backup.retain.hourly}
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retain daily ${toString cfg.backup.retain.daily}
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retain weekly ${toString cfg.backup.retain.weekly}
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backup ${cfg.mailDirectory}/ localhost/
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'';
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};
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};
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}
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