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

[Daniel van Vugt]

Shouldn't we keep using bug 1976352 for this? It's exactly the same
change.

** Tags added: jammy

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Title:
  [SRU] Backport label-ft plugin to 22.04

Status in plymouth package in Ubuntu:
  New

Bug description:
  [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

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