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nixpkgs/modules/services/misc/nix-gc.nix
Nicolas Pierron f4a6f9e84b * Add options to handle automatic calls to the garbage collector.
These options avoid manual references to pkgs.nixUnstable which might be
  changed with environment.nix option.

svn path=/nixos/trunk/; revision=18798
2009-12-04 12:50:44 +00:00

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Nix

{ config, pkgs, ... }:
with pkgs.lib;
let
nix = config.environment.nix;
cfg = config.nix.gc;
in
{
###### interface
options = {
nix.gc = {
automatic = mkOption {
default = false;
example = true;
description = "
Automatically run the garbage collector at specified dates.
";
};
dates = mkOption {
default = "15 03 * * *";
description = "
Run the garbage collector at specified dates to avoid full
hard-drives.
";
};
options = mkOption {
default = "";
example = "--max-freed $((64 * 1024**3))";
description = "
Options given to <filename>nix-collect-garbage</filename> when the
garbage collector is run automatically.
";
};
};
};
###### implementation
config = mkIf cfg.automatic {
services.cron.systemCronJobs = [
"${cfg.dates} root ${nix}/bin/nix-collect-garbage ${cfg.options} > /var/log/gc.log 2>&1"
];
};
}