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|
{ config, lib, pkgs, ... }:
with lib;
let cfg = config.system.autoUpgrade; in
{
options = {
system.autoUpgrade = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to periodically upgrade NixOS to the latest
version. If enabled, a systemd timer will run
<literal>nixos-rebuild switch --upgrade</literal> once a
day.
'';
};
channel = mkOption {
type = types.nullOr types.str;
default = null;
example = https://nixos.org/channels/nixos-14.12-small;
description = ''
The URI of the NixOS channel to use for automatic
upgrades. By default, this is the channel set using
<command>nix-channel</command> (run <literal>nix-channel
--list</literal> to see the current value).
'';
};
flags = mkOption {
type = types.listOf types.str;
default = [];
example = [ "-I" "stuff=/home/alice/nixos-stuff" "--option" "extra-binary-caches" "http://my-cache.example.org/" ];
description = ''
Any additional flags passed to <command>nixos-rebuild</command>.
'';
};
};
};
config = {
system.autoUpgrade.flags =
[ "--no-build-output" ]
++ (if cfg.channel == null
then [ "--upgrade" ]
else [ "-I" "nixpkgs=${cfg.channel}/nixexprs.tar.xz" ]);
systemd.services.nixos-upgrade = {
description = "NixOS Upgrade";
restartIfChanged = false;
unitConfig.X-StopOnRemoval = false;
serviceConfig.Type = "oneshot";
environment = config.nix.envVars //
{ inherit (config.environment.sessionVariables) NIX_PATH SSL_CERT_FILE;
HOME = "/root";
};
path = [ pkgs.gnutar pkgs.xz config.nix.package ];
script = ''
${config.system.build.nixos-rebuild}/bin/nixos-rebuild test ${toString cfg.flags}
'';
startAt = mkIf cfg.enable "04:40";
};
};
}
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