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nixos/restic: use optionalString/optionalAttrs where possible

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Jörg Thalheim 2020-01-30 17:07:21 +00:00
parent 1c9684abd6
commit 4fa2d4b5c3
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GPG key ID: 003F2096411B5F92
1 changed files with 15 additions and 26 deletions
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41
nixos/modules/services/backup/restic.nix
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@ -163,37 +163,19 @@ in
extraOptions = concatMapStrings (arg: " -o ${arg}") backup.extraOptions;
resticCmd = "${pkgs.restic}/bin/restic${extraOptions}";
filesFromTmpFile = "/run/restic-backups-${name}/includes";
preStartInit = if backup.initialize
then "${resticCmd} snapshots || ${resticCmd} init"
else "";
dynamicFilesFromScript = pkgs.writeScript "dynamicFilesFromScript" backup.dynamicFilesFrom;
preStartFiles = if backup.dynamicFilesFrom != null
then "${dynamicFilesFromScript} > ${filesFromTmpFile}"
else "";
preStartAttr = if (backup.initialize || backup.dynamicFilesFrom != null)
then {
preStart = ''
${preStartInit}
${preStartFiles}
'';
}
else {};
backupPaths = if (backup.dynamicFilesFrom == null)
then concatStringsSep " " backup.paths
else "--files-from ${filesFromTmpFile}";
pruneCmd = if (builtins.length backup.pruneOpts > 0)
then [ ( resticCmd + " forget --prune " +
(concatStringsSep " " backup.pruneOpts) )
( resticCmd + " check" ) ]
else [];
pruneCmd = optional (builtins.length backup.pruneOpts > 0) [
( resticCmd + " forget --prune " + (concatStringsSep " " backup.pruneOpts) )
( resticCmd + " check" )
];
in nameValuePair "restic-backups-${name}" ({
environment = {
RESTIC_PASSWORD_FILE = backup.passwordFile;
RESTIC_REPOSITORY = backup.repository;
};
path = with pkgs; [
openssh
];
path = [ pkgs.openssh ];
restartIfChanged = false;
serviceConfig = {
Type = "oneshot";
@ -203,9 +185,16 @@ in
} // optionalAttrs (backup.s3CredentialsFile != null) {
EnvironmentFile = backup.s3CredentialsFile;
};
}
// preStartAttr
// optionalAttrs (backup.dynamicFilesFrom != null) {
} // optionalAttrs (backup.initialize || backup.dynamicFilesFrom != null) {
preStart = ''
${optionalString (backup.initialize) ''
${resticCmd} snapshots || ${resticCmd} init
''}
${optionalString (backup.dynamicFilesFrom != null) ''
${pkgs.writeScript "dynamicFilesFromScript" backup.dynamicFilesFrom} > ${filesFromTmpFile}
''}
'';
} // optionalAttrs (backup.dynamicFilesFrom != null) {
postStart = ''
rm ${filesFromTmpFile}
'';