live-build doesn't work with multi-part initrds

[Adam Conrad]

[Impact]

Due to attempts to treat initrds as single compressed files (both for recompression, and in the lesser-used codepath for hunting through the initrd to find a file), multi-part initrds cause live-build to fail.

Proposed fix is to let initramfs-tools do the heavy lifting, by setting COMPRESS for generating initrds, and by using unmkinitramfs to unpack them and look around for stuff.

[Test Case]

A livefs build of a -proposed bionic image should generate a working initrd. To test this a new bionic build on cdimage should be started. The build should succeed and generate a working image.

[Regression Potential]

The initrds are empty right now so it can't get any worse than this.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

This bug was fixed in the package live-build - 3.0~a57-1ubuntu35

---------------
live-build (3.0~a57-1ubuntu35) cosmic; urgency=medium

  * ubuntu-initramfs-handling.patch: Use initramfs-tools to work with initrds,
    instead of trying to naively repack and unpack them blindly (LP: #1778811)

 -- Adam Conrad <email address hidden> Tue, 26 Jun 2018 16:36:32 -0600

[Łukasz Zemczak (sil2100)]

Hello Adam, or anyone else affected,

Accepted live-build into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/live-build/3.0~a57-1ubuntu34.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-bionic. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

[Łukasz Zemczak (sil2100)]

For xenial - I see the xenial SRU of live-build doesn't add the initramfs-tools dependency, is that not needed there? Or did that just slip through the cracks?

[Łukasz Zemczak (sil2100)]

Hello Adam, or anyone else affected,

Accepted live-build into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/live-build/3.0~a57-1ubuntu25.6 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-xenial to verification-done-xenial. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-xenial. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

[Launchpad Janitor (janitor)]

This bug was fixed in the package live-build - 3.0~a57-1ubuntu34.1

---------------
live-build (3.0~a57-1ubuntu34.1) bionic; urgency=medium

  * ubuntu-initramfs-handling.patch: Use initramfs-tools to work with initrds,
    instead of trying to naively repack and unpack them blindly (LP: #1778811)
  * debian/control: Need to depend on initramfs-tools which isn't in chroots.

 -- Adam Conrad <email address hidden> Tue, 26 Jun 2018 16:36:32 -0600

[Łukasz Zemczak (sil2100)]

Since the xenial builds seem to work correctly I'm actually marking this as verified.

[Łukasz Zemczak (sil2100)]

The verification of the Stable Release Update for live-build has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package live-build - 3.0~a57-1ubuntu25.6

---------------
live-build (3.0~a57-1ubuntu25.6) xenial; urgency=medium

  * ubuntu-initramfs-handling.patch: Use initramfs-tools to work with initrds,
    instead of trying to naively repack and unpack them blindly (LP: #1778811)

 -- Adam Conrad <email address hidden> Tue, 26 Jun 2018 16:36:32 -0600

[Łukasz Zemczak (sil2100)]

Hello Adam, or anyone else affected,

Accepted live-build into trusty-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/live-build/3.0~a57-1ubuntu11.5 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-trusty to verification-done-trusty. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-trusty. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Launchpad Janitor (janitor)]

This bug was fixed in the package live-build - 3.0~a57-1ubuntu11.5

---------------
live-build (3.0~a57-1ubuntu11.5) trusty; urgency=medium

  * Backport Adam's ubuntu-initramfs-handling.patch patch from xenial: Use
    initramfs-tools to work with initrds, instead of trying to naively repack
    and unpack them blindly (LP: #1778811)

 -- Łukasz 'sil2100' Zemczak <email address hidden> Mon, 04 Mar 2019 13:27:25 +0100