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nixpkgs/nixos/modules/services/backup/rsnapshot.nix
pennae 2e751c0772 treewide: automatically md-convert option descriptions
the conversion procedure is simple:

 - find all things that look like options, ie calls to either `mkOption`
   or `lib.mkOption` that take an attrset. remember the attrset as the
   option
 - for all options, find a `description` attribute who's value is not a
   call to `mdDoc` or `lib.mdDoc`
 - textually convert the entire value of the attribute to MD with a few
   simple regexes (the set from mdize-module.sh)
 - if the change produced a change in the manual output, discard
 - if the change kept the manual unchanged, add some text to the
   description to make sure we've actually found an option. if the
   manual changes this time, keep the converted description

this procedure converts 80% of nixos options to markdown. around 2000
options remain to be inspected, but most of those fail the "does not
change the manual output check": currently the MD conversion process
does not faithfully convert docbook tags like <code> and <package>, so
any option using such tags will not be converted at all.
2022-07-30 15:16:34 +02:00

76 lines
2.2 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.rsnapshot;
cfgfile = pkgs.writeText "rsnapshot.conf" ''
config_version 1.2
cmd_cp ${pkgs.coreutils}/bin/cp
cmd_rm ${pkgs.coreutils}/bin/rm
cmd_rsync ${pkgs.rsync}/bin/rsync
cmd_ssh ${pkgs.openssh}/bin/ssh
cmd_logger ${pkgs.inetutils}/bin/logger
cmd_du ${pkgs.coreutils}/bin/du
cmd_rsnapshot_diff ${pkgs.rsnapshot}/bin/rsnapshot-diff
lockfile /run/rsnapshot.pid
link_dest 1
${cfg.extraConfig}
'';
in
{
options = {
services.rsnapshot = {
enable = mkEnableOption "rsnapshot backups";
enableManualRsnapshot = mkOption {
description = lib.mdDoc "Whether to enable manual usage of the rsnapshot command with this module.";
default = true;
type = types.bool;
};
extraConfig = mkOption {
default = "";
example = ''
retains hourly 24
retain daily 365
backup /home/ localhost/
'';
type = types.lines;
description = lib.mdDoc ''
rsnapshot configuration option in addition to the defaults from
rsnapshot and this module.
Note that tabs are required to separate option arguments, and
directory names require trailing slashes.
The "extra" in the option name might be a little misleading right
now, as it is required to get a functional configuration.
'';
};
cronIntervals = mkOption {
default = {};
example = { hourly = "0 * * * *"; daily = "50 21 * * *"; };
type = types.attrsOf types.str;
description = lib.mdDoc ''
Periodicity at which intervals should be run by cron.
Note that the intervals also have to exist in configuration
as retain options.
'';
};
};
};
config = mkIf cfg.enable (mkMerge [
{
services.cron.systemCronJobs =
mapAttrsToList (interval: time: "${time} root ${pkgs.rsnapshot}/bin/rsnapshot -c ${cfgfile} ${interval}") cfg.cronIntervals;
}
(mkIf cfg.enableManualRsnapshot {
environment.systemPackages = [ pkgs.rsnapshot ];
environment.etc."rsnapshot.conf".source = cfgfile;
})
]);
}