Add nix-output-monitor

Use nix-output-monitor for things like my rebuilds

home/modules/baseline/xonsh_footer.xsh

@@ -1,6 +1,6 @@
-# vim: set ft=python :
+# vim: set ft=xonsh :
 
-from tempfile import NamedTemporaryFile
+from tempfile import NamedTemporaryFile, TemporaryDirectory
 
 def bw_unlock():
     """Unlocks the BitWarden CLI and adds the resulting session code to the
@@ -59,10 +59,18 @@ aliases['aws_creds'] = _aws_creds
 
 def _rebuild(args):
     system = uname()
+    hostname = system.nodename
     if system.sysname == 'Darwin':
         darwin-rebuild --flake ~/.config/darwin switch
     else:
-        sudo nixos-rebuild switch
+        with TemporaryDirectory() as td:
+            pushd @(td)
+            import platform
+            nom build f"/etc/nixos#nixosConfigurations.{hostname}.config.build.toplevel"
+            if g`result`:
+                nvd diff /run/current-system result
+                sudo result/bin/switch-to-configuration switch
+            popd
 aliases['rebuild'] = _rebuild
 
 def _yaml2json(args, stdin=None, stdout=None):

modules/baseline.nix

@@ -93,6 +93,7 @@ in
     iperf
     killall
     nano
+    nix-output-monitor
     pciutils
     pwgen
     unzip