initial commit

utils/bento.nix

@@ -0,0 +1,53 @@
+{
+  lib,
+  pkgs,
+  ...
+}: let
+  timer = "*:0/15";
+in {
+  systemd.services.bento-upgrade = {
+    enable = true;
+    startAt = lib.mkDefault "${timer}";
+    path = with pkgs; [openssh git nixos-rebuild nix gzip];
+    serviceConfig.Type = "oneshot";
+    script = ''
+      cd /var/bento
+      /bin/sh update.sh
+    '';
+    restartIfChanged = false;
+  };
+
+  systemd.services.bento-reboot = {
+    # this is disabled by default
+    # to avoid wrong expectations from users
+    enable = false;
+    startAt = "04:00";
+    path = with pkgs; [coreutils systemd];
+    serviceConfig.Type = "oneshot";
+    script = ''
+      booted="$(readlink /run/booted-system/{initrd,kernel,kernel-modules})"
+      built="$(readlink /nix/var/nix/profiles/system/{initrd,kernel,kernel-modules})"
+      if [ ! "$booted" = "$built" ]
+      then
+          systemctl kexec || systemctl reboot
+      fi
+    '';
+  };
+
+
+  systemd.sockets.listen-update = {
+    enable = true;
+    wantedBy = ["sockets.target"];
+    requires = ["network.target"];
+    listenStreams = ["51337"];
+    socketConfig.Accept = "yes";
+  };
+
+  systemd.services."listen-update@" = {
+    path = with pkgs; [systemd];
+    enable = true;
+    serviceConfig.StandardInput = "socket";
+    serviceConfig.ExecStart = "${pkgs.systemd.out}/bin/systemctl start bento-upgrade.service";
+    serviceConfig.ExecStartPost = "${pkgs.systemd.out}/bin/journalctl -f --no-pager -u bento-upgrade.service";
+  };
+}