feat: add buildthis bud command

bud/buildthis.bash

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+attr="$FLAKEROOT#$HOST"
+if [ -x /run/wrappers/bin/sudo ]; then
+    export PATH=/run/wrappers/bin:$PATH
+    sudo nixos-rebuild --flake "$attr" "${@:2}"
+else
+    nixos-rebuild --flake "$attr" "${@:2}"
+fi

bud/default.nix

@@ -6,5 +6,12 @@
       help = "Copy the desired template to DEST";
       script = ./get.bash;
     };
+
+    buildthis = {
+      writer = budUtils.writeBashWithPaths [ nixUnstable nixos-rebuild git coreutils mercurial ];
+      synopsis = "buildthis (switch|boot|test)";
+      help = "Shortcut for nixos-rebuild using the current hostname";
+      script = ./buildthis.bash;
+    };
   };
 }