Fabiano Fidêncio 4d835f6089 cache_components: Add the ability to cache the rootfs ...

This is the most complex part to cache, as the cached component can be
only used if:
* There were no changes in the agent
* There were no changes in the libs (used by the agent)
* There were no changes in the rootfs build scripts
* There is no change in the version of the following components:
  * attestation-agent (part of the rootfs)
  * gperf (used to build libseccomp)
  * libseccomp (used to build the agent)
  * pause image (part of the rootfs)
  * skopeo (part of the rootfs)
  * umoci (part of the rootfs)
  * rust (used to build the kata-containers and attestation agents)

We're relying on the last commit merged on places related to the rootfs
generation  and using that as the rootfs version and that should be good
enough for what we need.

Apart from everything already mentioned, we've also added the ability to
cache the `root_hash_vanilla.txt` and `root_hash_tdx.txt` files, as
those are needed for when building the shim-v2, in order to have
measured boot working there.

It's important to note that we've added the ability to cache *both*
files, and I've taken that path as the shim-v2 cache work (which will
come soon) relies on both files.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

2022-12-12 16:07:45 +01:00

..

osbuilder

CCv0: Merge main into CCv0 branch

2022-12-02 16:15:39 +00:00

packaging

cache_components: Add the ability to cache the rootfs

2022-12-12 16:07:45 +01:00