Right now, most build containers use root.  Archlinux, Fedora and Yocto set up
a regular user called `user`.

For those containers, trying to containerize as root fails, because
CONTAINER_UID0=1 does nothing, whereas CONTAINER_UID0=0 forces the user away
from root.

To make CONTAINER_UID0=1 work reliably, force to root if requested.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Anthony PERARD <anthony.perard@vates.tech>
CC: Juergen Gross <jgross@suse.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
CC: Jan Beulich <JBeulich@suse.com>
CC: Stefano Stabellini <sstabellini@kernel.org>
CC: Julien Grall <julien@xen.org>
CC: Oleksii Kurochko <oleksii.kurochko@gmail.com>
CC: Shawn Anastasio <sanastasio@raptorengineering.com>
---
 automation/scripts/containerize | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/automation/scripts/containerize b/automation/scripts/containerize
index acdef1b54813..03bc4837350c 100755
--- a/automation/scripts/containerize
+++ b/automation/scripts/containerize
@@ -51,7 +51,7 @@ esac
 
 # Use this variable to control whether root should be used
 case "_${CONTAINER_UID0}" in
-    _1)   userarg= ;;
+    _1)   userarg="-u 0" ;;
     _0|_) userarg="-u $(id -u) $userns_podman" ;;
 esac
 
-- 
2.39.2