nixos-config/modules/nix/autoupdater.nix
Charlotte 🦝 Delenk 98b7aa02da
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Hydra nixosConfigurations.container-default-x86_64-linux Hydra build #22945 of nixos-config:pr618:nixosConfigurations.container-default-x86_64-linux
Hydra nixosConfigurations.container-default-aarch64-linux Hydra build #22943 of nixos-config:pr618:nixosConfigurations.container-default-aarch64-linux
Hydra nixosConfigurations.container-default-riscv64-linux Hydra build #22944 of nixos-config:pr618:nixosConfigurations.container-default-riscv64-linux
Hydra checks.x86_64-linux.containers-default Hydra build #22942 of nixos-config:pr618:checks.x86_64-linux.containers-default
Hydra nixosConfigurations.not522 Hydra build #22946 of nixos-config:pr618:nixosConfigurations.not522
Hydra nixosConfigurations.not522-installer Hydra build #22947 of nixos-config:pr618:nixosConfigurations.not522-installer
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2024-11-02 13:45:42 +01:00

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Nix

{
config,
pkgs,
lib,
...
}: let
cfg = config.nix.auto-update;
in
with lib; {
options.nix.auto-update = {
enable = mkEnableOption "enable automatic updates";
reboot = mkEnableOption "Reboot if kernel change";
hydraServer = mkOption {
type = types.str;
description = "Location of hydra server";
default = "https://hydra.chir.rs";
};
project = mkOption {
type = types.str;
description = "Project name to use";
default = "nixos-config";
};
jobset = mkOption {
type = types.str;
description = "Jobset name to use";
default = "pr618";
};
job = mkOption {
type = types.str;
description = "Job name to use";
default = "nixosConfigurations.${config.networking.hostName}";
};
};
config.nix.auto-update.enable = mkDefault config.nix.enable;
config.nix.auto-update.reboot = mkDefault true;
config.systemd.services.nixos-upgrade = mkIf config.nix.enable {
description = "NixOS Upgrade";
restartIfChanged = false;
unitConfig.X-StopOnRemoval = false;
wants = ["network-online.target"];
after = ["network-online.target"];
serviceConfig.Type = "oneshot";
script = ''
#!${pkgs.bash}/bin/bash
set -euxo pipefail
build=$(${pkgs.curl}/bin/curl -H "accept: application/json" -G ${cfg.hydraServer}/api/latestbuilds -d "nr=10" -d "project=${cfg.project}" -d "jobset=${cfg.jobset}" -d "job=${cfg.job}" | ${pkgs.jq}/bin/jq -r '[.[]|select(.buildstatus==0)][0].id')
doc=$(${pkgs.curl}/bin/curl -H "accept: application/json" ${config.nix.auto-update.hydraServer}/build/$build)
drvname=$(echo $doc | ${pkgs.jq}/bin/jq -r '.drvpath')
output=$(${pkgs.nix}/bin/nix-store -r $drvname)
${pkgs.nix}/bin/nix-env -p /nix/var/nix/profiles/system --set $output
${
if config.nix.auto-update.reboot
then ''
$output/bin/switch-to-configuration boot
booted="$(${pkgs.coreutils}/bin/readlink /run/booted-system/{initrd,kernel,kernel-modules})"
built="$(${pkgs.coreutils}/bin/readlink $output/{initrd,kernel,kernel-modules})"
if [ "$booted" = "$built" ]; then
$output/bin/switch-to-configuration switch
else
${pkgs.systemd}/bin/shutdown -r +1
fi
exit
''
else ''
$output/bin/switch-to-configuration switch
''
}
'';
};
config.systemd.timers.nixos-upgrade = {
enable = config.nix.auto-update.enable;
description = "Automatically update nixos";
requires = ["nixos-upgrade.service"];
wants = ["network-online.target"];
after = ["network-online.target"];
wantedBy = ["multi-user.target"];
timerConfig = {
OnUnitActiveSec = "30min";
RandomizedDelaySec = "1h";
};
};
config.assertions = [
{
assertion = config.nix.auto-update.enable -> config.nix.enable;
message = "Auto updating will only work when nix itself is enabled.";
}
];
}