mount_disk_image function expects root partition to be at number 1. But
some images require the root partition to be at other some other number.
For example, EKS Anywhere images for bare metal are used with Tinkerbell
deployment with a default configuration that expects the root device to
be found at /dev/sda2. The knowledge of the root device path is needed
to modify certain files in the root filesystem (e.g. cloud-init configs)
for the machine to join Kubernetes cluster control plane.
The partition number can be changed in the hook by "sgidsk --transpose".
Allow the hook to use mount_disk_image with custom root partition number
by making it an optional third parameter that defaults to 1.
This makes the hook ok to use cross-flavor.
We could also move glib-compile-schemas to a separate hook, to ensure we never
silently fail because glib-compile-schemas is broken/missing.
When the files we're creating in the live layer have static content, ship
them in live-build/ubuntu/includes.chroot.minimal.standard.live instead of
generating them from live-build/ubuntu/hooks/020-ubuntu-live.chroot_early.
Also fixes the fact that
live-build/ubuntu/hooks/020-ubuntu-live.chroot_early was incorrectly writing
to /root in the previous upload instead of /usr.
Somewhere along the line, we started trying to add packages to the live
environment of flavor "preinstalled" images. But:
- we don't build preinstalled images for any flavors
- the preinstalled images for projects like cloud images and wsl are
explicitly excepted from this code
- the only desktop project we do produce preinstalled images for, Ubuntu
on Raspberry Pi, uses ubuntu-image for building so this code is never
reached
ppc64el still uses /boot/vmlinux so we need to determine the boot file name as non ppc64el use /boot/vmlinuz. This
is then used to determine the kernel major minor version installed so that the correct apparmor features can be used
during snap preseeding. This preseeding was failing for ppc64el for the mantic 6.5 kernel as the /boot/vmlinuz
being checked did not exist.
