102 lines
2.8 KiB
Nix
102 lines
2.8 KiB
Nix
{ config, lib, ... }:
|
|
|
|
let
|
|
cfg = config.nix.gc;
|
|
in
|
|
|
|
{
|
|
|
|
###### interface
|
|
|
|
options = {
|
|
|
|
nix.gc = {
|
|
|
|
automatic = lib.mkOption {
|
|
default = false;
|
|
type = lib.types.bool;
|
|
description = lib.mdDoc "Automatically run the garbage collector at a specific time.";
|
|
};
|
|
|
|
dates = lib.mkOption {
|
|
type = lib.types.singleLineStr;
|
|
default = "03:15";
|
|
example = "weekly";
|
|
description = lib.mdDoc ''
|
|
How often or when garbage collection is performed. For most desktop and server systems
|
|
a sufficient garbage collection is once a week.
|
|
|
|
The format is described in
|
|
{manpage}`systemd.time(7)`.
|
|
'';
|
|
};
|
|
|
|
randomizedDelaySec = lib.mkOption {
|
|
default = "0";
|
|
type = lib.types.singleLineStr;
|
|
example = "45min";
|
|
description = lib.mdDoc ''
|
|
Add a randomized delay before each garbage collection.
|
|
The delay will be chosen between zero and this value.
|
|
This value must be a time span in the format specified by
|
|
{manpage}`systemd.time(7)`
|
|
'';
|
|
};
|
|
|
|
persistent = lib.mkOption {
|
|
default = true;
|
|
type = lib.types.bool;
|
|
example = false;
|
|
description = lib.mdDoc ''
|
|
Takes a boolean argument. If true, the time when the service
|
|
unit was last triggered is stored on disk. When the timer is
|
|
activated, the service unit is triggered immediately if it
|
|
would have been triggered at least once during the time when
|
|
the timer was inactive. Such triggering is nonetheless
|
|
subject to the delay imposed by RandomizedDelaySec=. This is
|
|
useful to catch up on missed runs of the service when the
|
|
system was powered down.
|
|
'';
|
|
};
|
|
|
|
options = lib.mkOption {
|
|
default = "";
|
|
example = "--max-freed $((64 * 1024**3))";
|
|
type = lib.types.singleLineStr;
|
|
description = lib.mdDoc ''
|
|
Options given to [`nix-collect-garbage`](https://nixos.org/manual/nix/stable/command-ref/nix-collect-garbage) when the garbage collector is run automatically.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
};
|
|
|
|
|
|
###### implementation
|
|
|
|
config = {
|
|
assertions = [
|
|
{
|
|
assertion = cfg.automatic -> config.nix.enable;
|
|
message = ''nix.gc.automatic requires nix.enable'';
|
|
}
|
|
];
|
|
|
|
systemd.services.nix-gc = lib.mkIf config.nix.enable {
|
|
description = "Nix Garbage Collector";
|
|
script = "exec ${config.nix.package.out}/bin/nix-collect-garbage ${cfg.options}";
|
|
serviceConfig.Type = "oneshot";
|
|
startAt = lib.optional cfg.automatic cfg.dates;
|
|
};
|
|
|
|
systemd.timers.nix-gc = lib.mkIf cfg.automatic {
|
|
timerConfig = {
|
|
RandomizedDelaySec = cfg.randomizedDelaySec;
|
|
Persistent = cfg.persistent;
|
|
};
|
|
};
|
|
|
|
};
|
|
|
|
}
|