[Bug 1337538] Re: arm64/xgene-uboot lacks u-boot-tools

[dann frazier]

The relationship between these is as follows.

flash-kernel requires u-boot-tools on certain platforms.  This is
detected at d-i installtime by flash-kernel-installer like so:

dannf at mustang:~$ export FK_DIR="/usr/share/flash-kernel"
dannf at mustang:~$ . $FK_DIR/functions
dannf at mustang:~$ machine="$(get_cpuinfo_hardware)"
dannf at mustang:~$ echo $machine
APM X-Gene Mustang board
dannf at mustang:~$ get_machine_field "$machine" "Required-Packages"
u-boot-tools
dannf at mustang:~$

Presumably this is because arm platforms have historically been
embedded, so it made sense to make this a dynamic decision vs. a hard
package dependency to avoid installing unnecessary packages where
possible. That's just a guess though.

flash-kernel installs an initramfs-hook that causes flash-kernel to be
executed when the initramfs is regenerated. If the platform requires u
-boot-tools, it expected u-boot-tools to be there. Now, it could be
argued that flash-kernel's initramfs-tools hook shouldn't exit with an
error in this situation (due to a missing but undeclared dependency),
and perhaps instead print a large warning to the console - that's an
easy enough fix. But I don't know of a good way to make a
non-d-i-installer know what packages d-i would install on a target
platform w/o some higher level redesign.

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https://bugs.launchpad.net/bugs/1337538

Title:
  arm64/xgene-uboot lacks u-boot-tools

Status in Maas image builders:
  Confirmed
Status in “flash-kernel” package in Ubuntu:
  New

Bug description:
  Just filing this bug here as I didn't know where else to file it. But
  long story short, the maas ephemeral image for arm64/xgene-uboot lacks
  u-boot-tools. This needs to be available in the image.

  'u-boot-tools'

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