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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.locate;
in {
###### interface
options = {
services.locate = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
If enabled, NixOS will periodically update the database of
files used by the <command>locate</command> command.
'';
};
period = mkOption {
type = types.str;
default = "15 02 * * *";
description = ''
This option defines (in the format used by cron) when the
locate database is updated.
The default is to update at 02:15 at night every day.
'';
};
extraFlags = mkOption {
type = types.listOf types.str;
default = [ ];
description = ''
Extra flags to append to <command>updatedb</command>.
'';
};
output = mkOption {
type = types.path;
default = /var/cache/locatedb;
description = ''
The database file to build.
'';
};
localuser = mkOption {
type = types.str;
default = "nobody";
description = ''
The user to search non-network directories as, using
<command>su</command>.
'';
};
};
};
###### implementation
config = {
systemd.services.update-locatedb =
{ description = "Update Locate Database";
path = [ pkgs.su ];
script =
''
mkdir -m 0755 -p $(dirname ${toString cfg.output})
exec updatedb \
--localuser=${cfg.localuser} \
--output=${toString cfg.output} ${concatStringsSep " " cfg.extraFlags}
'';
serviceConfig.Nice = 19;
serviceConfig.IOSchedulingClass = "idle";
};
services.cron.systemCronJobs = optional config.services.locate.enable
"${config.services.locate.period} root ${config.systemd.package}/bin/systemctl start update-locatedb.service";
};
}
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