[Merge] ~toabctl/livecd-rootfs:jammy-fix-snap-validate-seed into livecd-rootfs:ubuntu/jammy

[Thomas Bechtold]

> > > you mean having a full feature directory copy for each supported kernel
> > > version in livecd-rootfs? and then just bindmount that?
> >
> > That is indeed what I was thinking. Yes, each (major) kernel of the series
> if
> > they have feature sets different from the generic kernel. Those feature dirs
> > are fairly straightforward to maintain and shouldn't.
> >
> > There shouldn't be many of those and it makes more sense to me than what
> > commit bd1690bd16c70f9631 does.
> 
> I think Simon's approach is probably a safer bet -- each kernel should have
> it's own full directory structure. I'd even go so far as to say "generic"
> should be a bare directory and we should enforce every kernel major.min to
> have a directory.

if we don't have a default feature directory, we need to rewrite the installed kernel version detection. the current symlink approach won't work with /boot being vfat because there will be no symlink. but we could use dpkg maybe?

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https://code.launchpad.net/~toabctl/livecd-rootfs/+git/livecd-rootfs-1/+merge/445180
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