[Bug 1778811] [NEW] live-build doesn't work with multi-part initrds

[Adam Conrad]

Public bug reported:

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.

** Affects: live-build (Ubuntu)
     Importance: Undecided
         Status: Confirmed

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https://bugs.launchpad.net/bugs/1778811

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

Status in live-build package in Ubuntu:
  Confirmed

Bug description:
  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.

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