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64056add0d
kata-deploy now unpacks individual component tarballs itself, so the
final `kata-static.tar.zst` no longer needs to be a merged filesystem
payload. Merging everything has two downsides for that flow:
- It pulls in everything kept on disk under build/, which previously
forced us to also drop agent/busybox/coco-guest-components/nydus
from the build set to keep them out of the final tarball.
- The merged tarball duplicates content kata-deploy will repack on
its own anyway.
Add a `passthrough` mode to kata-deploy-merge-builds.sh that, instead
of untarring each `kata-static-*.tar.zst` into a single filesystem
tree, copies the selected component tarballs into the final tarball
as-is. The existing `merge` mode remains the default to preserve the
non-kata-deploy install paths (e.g. `make install-tarball`).
Wire `nvgpu-tarball` to the new mode via `FINAL_TARBALL_MERGE_MODE=
passthrough`, paired with the existing `FINAL_TARBALL_INPUTS`
allowlist. This lets us keep agent/busybox/coco as build prereqs of
the GPU rootfs while shipping a final tarball that only contains the
NVIDIA-relevant components.
Signed-off-by: Fabiano Fidêncio <ffidencio@nvidia.com>