add a script to update my hosts

modules/common/default.nix

@@ -88,6 +88,21 @@ in
     HIGHLIGHT_STYLE = "solarized-light";
   };
 
+  security.sudo = {
+    enable = true;
+    extraRules = [
+      {
+        users = [ "andreas" ];
+        commands = [
+          {
+            command = "${pkgs.nixos-rebuild} -j auto switch";
+            options = [ "SETENV" "NOPASSWD" ];
+          }
+        ];
+      }
+    ];
+  };
+
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
   # on your system were taken. It‘s perfectly fine and recommended to leave

scripts/update_all_systems.xsh

@@ -0,0 +1,15 @@
+#!/usr/bin/env xonsh
+
+hosts = [
+ "grav",
+ "heimdall",
+ "nixos-test-vm",
+]
+
+for host in hosts:
+    fqdn = "{}.2li.local".format(host)
+    print(fqdn)
+    print("-" * len(fqdn))
+    ssh @(fqdn) 'cd .nixos && git pull && sudo rebuild'
+    print("")
+    print("")