Merge pull request #241949 from R-VdP/nixos_test_busybox

nixos/test-driver: use the short form argument to base64 for busybox compatibility.

nixos/lib/test-driver/test_driver/machine.py

···
         # While sh is bash on NixOS, this is not the case for every distro.
         # We explicitly call bash here to allow for the driver to boot other distros as well.
         out_command = (
-            f"{timeout_str} bash -c {shlex.quote(command)} | (base64 --wrap 0; echo)\n"
+            f"{timeout_str} bash -c {shlex.quote(command)} | (base64 -w 0; echo)\n"
         )
 
         assert self.shell

nixos/tests/all-tests.nix

···
     extra-python-packages = handleTest ./nixos-test-driver/extra-python-packages.nix {};
     lib-extend = handleTestOn [ "x86_64-linux" "aarch64-linux" ] ./nixos-test-driver/lib-extend.nix {};
     node-name = runTest ./nixos-test-driver/node-name.nix;
+    busybox = runTest ./nixos-test-driver/busybox.nix;
   };
 
   # NixOS vm tests and non-vm unit tests

nixos/tests/nixos-test-driver/busybox.nix

···
+{
+  name = "Test that basic tests work when busybox is installed";
+
+  nodes = {
+    machine = ({ pkgs, ... }: {
+      environment.systemPackages = [
+        pkgs.busybox
+      ];
+    });
+  };
+
+  testScript = ''
+    start_all()
+    machine.wait_for_unit("multi-user.target")
+  '';
+}