[Bug 1981432] [NEW] [SRU] Backport label-ft plugin to 22.04

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Alfonso Sanchez-Beato (alfonsosanchezbeato):

[Impact]

 * This is a request to backport changes in kinetic plymouth package
   to 0.9.5+git20211018-1ubuntu4 to jammy. That version contains a new
   plugin named label-ft, which was introduced to replace the label
   plugin in Ubuntu Core systems. The difference with the label plugin
   is that it pulls much less dependencies (LP: #1976352), which allows
   a much smaller initramfs. This change should not affect classic systems.

[Test Plan]

 * The test plan consists on creating a UC image using this package and
make sure that label.so and cairo/pango dependencies are not pulled,
while we still have a splash screen.

 * For classic, the test plan is to refresh plymouth and make sure that
   it still uses label.so and its dependencies, and still the splash
   works.

[Where problems could occur]

 * The change introduces a new package named plymouth-label-ft with the
label-ft.so plugin. This package will not be installed on classic by
default, and it is the main change proposed. The rest of the plymouth
code changes use label-ft.so as a fallback if label.so is not present.
This is just a few lines of code, and still uses label.so by default, so
the potential risk of breaking the splash should be small. If something
goes wrong, we could be without splash and without a user friendly way
of unlocking disks if using FDE.

[Other Info]

 * Change should be relevant for UC only

** Affects: plymouth (Ubuntu)
     Importance: Undecided
         Status: New

-- 
[SRU] Backport label-ft plugin to 22.04
https://bugs.launchpad.net/bugs/1981432
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