[Bug 1799773] Re: Accelerate the build: Drop unused checksum generation

[Robert C Jennings]

** Description changed:

  [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
+  * 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 
+  * 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
+  * 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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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:
  New
Status in livecd-rootfs source package in Bionic:
  New
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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