UC22 armhf Raspi images are failing to build

[William Wilson]

[Impact]

 * With the current version of snapd vendored in ubuntu-image,
   UC22 armhf+raspi image builds fail with the following error:

```
   mv: cannot stat '/tmp/ubuntu-image-824a59fe-574a-4d00-8669-f16d22bbe23e/unpack/system-seed/systems/20220422/kernel/dtbs/broadcom/*': No such file or directory
```

[Test Plan]

 * Download the Raspberry Pi UC22 armhf edge model assertion

 * Run the command: `ubuntu-image snap <path/to/model/assertion>`

 * Observe the error listed above

 * Install ubuntu-image from jammy-proposed

 * Run the same `ubuntu-image` command again

 * Observe an image is successfully created

[Where problems could occur]

 * This will be solved by vendoring a newer version of snapd.
   Any undetected bugs in snapd could cause regressions here.

[Steve Langasek (vorlon)]

Hello William, or anyone else affected,

Accepted ubuntu-image into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ubuntu-image/2.2+22.04ubuntu3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[William Wilson (jawn-smith)]

The verification has passed for jammy:

```
jawn-smith@desktop:~/utils/raspberry-pi-scripts$ apt-cache policy ubuntu-image
ubuntu-image:
  Installed: 2.2+22.04ubuntu2
  Candidate: 2.2+22.04ubuntu3
  Version table:
     2.2+22.04ubuntu3 500
        500 http://us.archive.ubuntu.com/ubuntu jammy-proposed/main amd64 Packages
 *** 2.2+22.04ubuntu2 500
        500 http://us.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
        100 /var/lib/dpkg/status
jawn-smith@desktop:~/utils/raspberry-pi-scripts$ ubuntu-image snap ubuntu-core-22-armhf+raspi.model-assertion
WARNING: proceeding to download snaps ignoring validations, this default will change in the future. For now use --validation=enforce for validations to be taken into account, pass instead --validation=ignore to preserve current behavior going forward
Fetching snapd
Fetching pi-kernel
Fetching core22
Fetching pi
Error: Error preparing image: cannot extract recovery system kernel assets: cannot move RPi dtbs to /tmp/ubuntu-image-42adc97c-e0a0-49db-aea6-641a7b06a2a3/unpack/system-seed/systems/20220425/kernel:
mv: cannot stat '/tmp/ubuntu-image-42adc97c-e0a0-49db-aea6-641a7b06a2a3/unpack/system-seed/systems/20220425/kernel/dtbs/broadcom/*': No such file or directory

jawn-smith@desktop:~/utils/raspberry-pi-scripts$ sudo apt install ubuntu-image
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  gir1.2-gnomebluetooth-1.0 libicu67 libpython3.9 libpython3.9-minimal libpython3.9-stdlib
Use 'sudo apt autoremove' to remove them.
The following packages will be upgraded:
  ubuntu-image
1 upgraded, 0 newly installed, 0 to remove and 44 not upgraded.
Need to get 4,286 kB of archives.
After this operation, 69.6 kB of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com/ubuntu jammy-proposed/main amd64 ubuntu-image amd64 2.2+22.04ubuntu3 [4,286 kB]
Fetched 4,286 kB in 1s (7,926 kB/s)
The system does not support apt-btrfs-snapshot
Requesting to save current system state
Successfully saved as "autozsys_e186h6"
(Reading database ... 547206 files and directories currently installed.)
Preparing to unpack .../ubuntu-image_2.2+22.04ubuntu3_amd64.deb ...
Unpacking ubuntu-image (2.2+22.04ubuntu3) over (2.2+22.04ubuntu2) ...
Setting up ubuntu-image (2.2+22.04ubuntu3) ...
Processing triggers for man-db (2.10.2-1) ...
ZSys is adding automatic system snapshot to GRUB menu
jawn-smith@desktop:~/utils/raspberry-pi-scripts$ ubuntu-image snap ubuntu-core-22-armhf+raspi.model-assertion
WARNING: proceeding to download snaps ignoring validations, this default will change in the future. For now use --validation=enforce for validations to be taken into account, pass instead --validation=ignore to preserve current behavior going forward
Fetching snapd
Fetching pi-kernel
Fetching core22
Fetching pi
jawn-smith@desktop:~/utils/raspberry-pi-scripts$ echo $?
0
jawn-smith@desktop:~/utils/raspberry-pi-scripts$ ls pi.img
pi.img
```

[Launchpad Janitor (janitor)]

This bug was fixed in the package ubuntu-image - 2.2+22.04ubuntu3

---------------
ubuntu-image (2.2+22.04ubuntu3) jammy; urgency=medium

  [ William 'jawn-smith' Wilson ]
  * Add lintian overrides for test files

  [ Maciej Borzecki ]
  * Pull in a newer snapd version and load snaps from all modes (LP: #1969979)

 -- William 'jawn-smith' Wilson <email address hidden> Wed, 13 Apr 2022 16:28:11 -0500

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for ubuntu-image has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.