Fixed regression when using UsrOnly during initial install

Several distributions call `run_workspace_command()` during installation and
this now requires the root directory that gets bind mounted in to exist. The
created directory will be removed anyway since it exists under a temporary
workspace.

As an example, the documentation removal when installing a Debian derivative
will fail without this change.

diff --git a/mkosi/__init__.py b/mkosi/__init__.py
index 3a9625de40b8b20b1e91ae5293a7cb67adb92cd1..9881099bf448eae1ae9257b9a1d66a21d05a9be8 100644 (file)
--- a/mkosi/__init__.py
+++ b/mkosi/__init__.py
@@ -1841,7 +1841,7 @@ def prepare_tree(args: MkosiArgs, root: Path, do_run_build_script: bool, cached:
             root.joinpath("etc/kernel/entry-token").write_text(f"{args.machine_id}\n")
             root.joinpath("etc/kernel/install.conf").write_text("layout=bls\n")
 
-        if do_run_build_script or args.ssh:
+        if do_run_build_script or args.ssh or args.usr_only:
             root_home(args, root).mkdir(mode=0o750)
 
         if args.ssh and not do_run_build_script: