[Bug 1864426] Re: [SRU][live-build] can not customize the mkisoimage option

[hugh chao]

tried to build the oem image with this version and below config

ISOHYBRID_OPTIONS="--uefi"
GENISOIMAGE_OPTIONS_EXTRA="-eltorito-alt-boot -efi-boot boot/grub/efi.img -no-emul-boot -joliet-long"

there are two partitions in the images and can boot from the usb sticker
correctly.

** Tags removed: verification-needed-focal
** Tags added: verification-done-focal

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https://bugs.launchpad.net/bugs/1864426

Title:
  [SRU][live-build] can not customize the mkisoimage option

Status in OEM Priority Project:
  Fix Committed
Status in OEM Priority Project focal series:
  Fix Committed
Status in live-build package in Ubuntu:
  Fix Released
Status in live-build source package in Focal:
  Fix Committed

Bug description:
  [Impact]

  Although live build has been used in both oem and foundation team, but
  the main different is that:

  --Foundation--
  Only for squashfs, cd-image will be used after that, the iso image created by live build will not be used directly.

  --OEM--
  Oem team uses live build in whole process which includes several binary hooks, and the final image created by live build will be used directly.

  So the problem is that currently the iso image which created by live build doesn't support uefi boot,
  so when we build a support uefi bootable image, the mkisoimage needs extra options.

  [Test Case]
  With below options in any live build config (oem team put it in <config>/common), an uefi bootable image can be built.

  ISOHYBRID_OPTIONS="--uefi"
  GENISOIMAGE_OPTIONS_EXTRA="-eltorito-alt-boot -efi-boot boot/grub/efi.img -no-emul-boot -joliet-long"

  [Regression Potential]
  Low, oem team has been using this patch for years (from 2012),
  we haven't found any potential regression.

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