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Update the locate database using a systemd service

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This makes it easier to update the database manually ("systemctl start
update-locatedb").

Also, use modern module syntax.
This commit is contained in:
Eelco Dolstra 2013-08-14 02:58:55 +02:00
parent fc2fc63f4c
commit ce866184c6
1 changed files with 50 additions and 48 deletions
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98
modules/misc/locate.nix
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@ -1,60 +1,62 @@
{pkgs, config, ...}:
{ config, pkgs, ... }:
with pkgs.lib;
###### interface
let
inherit (pkgs.lib) mkOption;
options = {
services = {
locate = {
enable = mkOption {
default = false;
example = true;
description = ''
If enabled, NixOS will periodically update the database of
files used by the <command>locate</command> command.
'';
};
period = mkOption {
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.
'';
};
};
};
};
in
###### implementation
let
locatedb = "/var/cache/locatedb";
updatedbCmd =
"${config.services.locate.period} root " +
"mkdir -m 0755 -p $(dirname ${locatedb}) && " +
"nice -n 19 ${pkgs.utillinux}/bin/ionice -c 3 " +
"updatedb --localuser=nobody --output=${locatedb} > /var/log/updatedb 2>&1";
in
{
require = [
# ../../upstart-jobs/cron.nix # config.services.cron
options
];
services = {
cron = {
systemCronJobs =
pkgs.lib.optional
config.services.locate.enable
updatedbCmd;
###### interface
options = {
services.locate = {
enable = mkOption {
default = false;
example = true;
description = ''
If enabled, NixOS will periodically update the database of
files used by the <command>locate</command> command.
'';
};
period = mkOption {
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.
'';
};
};
};
###### implementation
config = {
systemd.services.update-locatedb =
{ description = "Update Locate Database";
path = [ pkgs.su ];
script =
''
mkdir -m 0755 -p $(dirname ${locatedb})
exec updatedb --localuser=nobody --output=${locatedb}
'';
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";
};
}