add a script for remote updates

scripts/remote_switch.xsh

@@ -0,0 +1,19 @@
+#!/usr/bin/env xonsh
+
+hosts = [
+ "grav",
+ "heimdall",
+ "nixos-test-vm",
+]
+
+rsa_key = "~/.nixos/secrets/ssh_keys/ansible/ansible.key"
+$NIX_SSHOPTS="-t -i " + rsa_key
+
+for host in hosts:
+    fqdn = "{}.2li.local".format(host)
+    print(fqdn)
+    print("-" * len(fqdn))
+    nixos-rebuild switch --use-remote-sudo --build-host localhost --target-host @(fqdn) --flake @(".#" + host)
+    #echo @(fqdn) @(".#" + host)
+    print("")
+    print("")