[Bug 2124984] Re: build.info is not present on ubuntu-base and ubuntu-oci Jammy images

[Launchpad Bug Tracker]

** Merge proposal linked:
   https://code.launchpad.net/~allenab/livecd-rootfs/+git/livecd-rootfs/+merge/494138

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https://bugs.launchpad.net/bugs/2124984

Title:
  build.info is not present on ubuntu-base and ubuntu-oci Jammy images

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Jammy:
  Fix Committed

Bug description:
  [ Impact ]
  - Currently, every supported ubuntu-base and ubuntu-oci Ubuntu image since Noble contains the file /etc/cloud/build.info which provides information about the build_name and its corresponding serial. Ex:
      build_name: server
      serial: 20250821
  - This file provides crucial information about the image which is used by subsequent processes. For example:
      CPC test automation uses this to check if the image is a pro or FIPS image
  - Since this file was introduced in Noble, Jammy images do not contain this file
  - We would like to add this file into Jammy ubuntu-base and ubuntu-oci images to meet requirements for cloud images
  - The proposed plan involves changing the build file in livecd-rootfs to insert the /etc/cloud/build.info file at image build time

  [ Test Plan ]
  - Check if the current Jammy ubuntu-base and ubuntu-oci images contains the /etc/cloud/build.info file
  - With this change, all newly generated ubuntu-base and ubuntu-oci Ubuntu images should contain the above mentioned file
  - Check that the file contains the expected content

  [ Where problems could occur ]
  - If any of the user’s process involves creating a folder with a similar path, ex: if they have an automation which creates a folder cloud in /etc

  [ Other Info ]
  ~$ lsb_release -rd
  Description:    Ubuntu 22.04.5 LTS
  Release:        22.0

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