109 lines
3 KiB
Nix
109 lines
3 KiB
Nix
# Run automatic updates. Replaces system.autoUpgrade.
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{
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config,
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lib,
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pkgs,
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...
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}:
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let
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cfg = config.host.services.autoUpgrade;
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# List of packages to include in each service's $PATH
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pathPkgs = with pkgs; [
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# Courtesy of https://discourse.nixos.org/t/how-to-use-other-packages-binary-in-systemd-service-configuration/14363
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coreutils
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git
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gnutar
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gzip
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config.nix.package.out
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nh
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config.programs.ssh.package
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sudo
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xz.bin
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];
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in
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{
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options = {
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host.services.autoUpgrade = {
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enable = lib.mkOption {
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default = true;
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type = lib.types.bool;
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description = "Enables automatic system updates.";
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};
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pushUpdates = lib.mkEnableOption (
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lib.mdDoc "Updates the flake.lock file and pushes it back to the repo."
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);
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};
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};
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config = lib.mkMerge [
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(lib.mkIf cfg.enable {
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# Pull and apply updates.
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systemd.services."nixos-upgrade" = {
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serviceConfig = {
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Type = "oneshot";
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User = "root";
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};
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path = pathPkgs;
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script = ''
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cd ${config.secrets.nixConfigFolder}
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# Check if there are changes from Git.
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echo "Pulling latest version..."
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sudo -u aires git fetch
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sudo -u aires git diff --quiet --exit-code main origin/main || true
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# If we have changes (git diff returns 1), pull changes and run the update
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if [ $? -eq 1 ]; then
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echo "Updates found, running nixos-rebuild..."
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sudo -u aires git pull --recurse-submodules
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nh os switch
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else
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echo "No updates found. Exiting."
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fi
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'';
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};
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systemd.timers."nixos-upgrade-timer" = {
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wants = [ "network-online.target" ];
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after = [ "network-online.target" ];
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar = "daily";
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Persistent = "true";
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Unit = "nixos-upgrade.service";
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};
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};
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})
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(lib.mkIf cfg.pushUpdates {
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# Automatically update Flake configuration for other hosts to use
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systemd.services."nixos-upgrade-flake" = {
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serviceConfig = {
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Type = "oneshot";
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User = config.users.users.aires.name;
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};
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path = pathPkgs;
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# Git diffing strategy courtesy of https://stackoverflow.com/a/40255467
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script = ''
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set -eu
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cd ${config.secrets.nixConfigFolder}
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# Make sure we're up-to-date
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echo "Pulling the latest version..."
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git pull --recurse-submodules
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nix flake update --commit-lock-file
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git push
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'';
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};
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systemd.timers."nixos-upgrade-flake-timer" = {
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wants = [ "network-online.target" ];
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after = [ "network-online.target" ];
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar = "daily";
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Persistent = "true";
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Unit = "nixos-upgrade-flake.service";
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};
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};
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})
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];
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}
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