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restic: allow prune without backup

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fixes #97820
This commit is contained in:
Matt McHenry 2021-03-19 20:14:43 -04:00 • committed by Cole Helbling
parent ef2ac47659
commit 13bee29b9b
2 changed files with 14 additions and 5 deletions
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13
nixos/modules/services/backup/restic.nix
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@ -93,10 +93,12 @@ in
};
paths = mkOption {
type = types.listOf types.str;
default = [];
type = types.nullOr (types.listOf types.str);
default = null;
description = ''
Which paths to backup.
Which paths to backup. If null or an empty array, no
backup command will be run. This can be used to create a
prune-only job.
'';
example = [
"/var/lib/postgresql"
@ -217,7 +219,7 @@ in
resticCmd = "${pkgs.restic}/bin/restic${extraOptions}";
filesFromTmpFile = "/run/restic-backups-${name}/includes";
backupPaths = if (backup.dynamicFilesFrom == null)
then concatStringsSep " " backup.paths
then if (backup.paths != null) then concatStringsSep " " backup.paths else ""
else "--files-from ${filesFromTmpFile}";
pruneCmd = optionals (builtins.length backup.pruneOpts > 0) [
( resticCmd + " forget --prune " + (concatStringsSep " " backup.pruneOpts) )
@ -243,7 +245,8 @@ in
restartIfChanged = false;
serviceConfig = {
Type = "oneshot";
ExecStart = [ "${resticCmd} backup --cache-dir=%C/restic-backups-${name} ${concatStringsSep " " backup.extraBackupArgs} ${backupPaths}" ] ++ pruneCmd;
ExecStart = (optionals (backupPaths != "") [ "${resticCmd} backup --cache-dir=%C/restic-backups-${name} ${concatStringsSep " " backup.extraBackupArgs} ${backupPaths}" ])
++ pruneCmd;
User = backup.user;
RuntimeDirectory = "restic-backups-${name}";
CacheDirectory = "restic-backups-${name}";