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[Launchpad Bug Tracker <1799773@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package livecd-rootfs - 2.408.41

---------------
livecd-rootfs (2.408.41) xenial; urgency=medium

  * Disable checksum generation (LP: #1799773)

livecd-rootfs (2.408.40) xenial; urgency=medium

  [ Cody Shepherd ]
  * Increasing modularity in relocation of /etc/resolv.conf to enable users
    of live-build/functions to manipulate /etc/resolv.conf in a more
    granular and future-proof way.  LP: #1801134.

livecd-rootfs (2.408.39) xenial; urgency=medium

  * Backport support for building ubuntu-core images with ubuntu-image (using
    IMAGEFORMAT=ubuntu-image).
  * Decide what model assertion series to fetch depending on the suite. Use 16
    for xenial and 18 for other series (bionic+). This enables core18 image
    builds (LP: #1799736).

 -- Robert C Jennings <robert.jennings@xxxxxxxxxxxxx>  Fri, 16 Nov 2018
08:37:57 -0800

** Changed in: livecd-rootfs (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1799773

Title:
  Accelerate the build: Drop unused checksum generation

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Xenial:
  Fix Released
Status in livecd-rootfs source package in Bionic:
  Fix Released
Status in livecd-rootfs source package in Cosmic:
  Fix Released

Bug description:
  [Impact]

   * Image builds take time
   * Some of the time is spent computing checksums
   * Those checksums are never used
   * Time and energy is wasted
   * build/(md5|sha256)sum.txt is not used by livecd-rootfs and not exposed by launchpad-buildd

  [Test Case]

   * Build images
   * Disable checksums
   * Build images
   * Ensure image deliverables are unchanged

  [Regression Potential]

   * Someone was using the checksums outside of launchpad-buildd; because launchpad-buildd doesn't present those artifacts
   * The checksums are included beside the squashfs in live-build ISOs but none of our projects use live-build to build ISOs.

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