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bootimg_pcbios: add help and usage comments

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Adds comments underneath class declaration
defining plugin usage and potential
optional variables to set.

(From OE-Core rev: 6a8c350f595255b6febfdbc5af668286ccb973df)

Signed-off-by: Vincent Davis Jr <vince@underview.tech>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Vincent Davis Jr 2025-08-14 00:25:51 -04:00 committed by Richard Purdie
parent a495fec1bf
commit c74dfd8f81
1 changed files with 42 additions and 1 deletions
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43
scripts/lib/wic/plugins/source/bootimg_pcbios.py
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@ -26,7 +26,48 @@ logger = logging.getLogger('wic')
class BootimgPcbiosPlugin(SourcePlugin):
"""
Create MBR boot partition and install syslinux on it.
Creates boot partition that is legacy BIOS firmare bootable with
MBR/MSDOS as partition table format. Plugin will install caller
selected bootloader directly to resulting wic image.
Supported Bootloaders:
* syslinux (default)
* grub
****************** Wic Plugin Depends/Vars ******************
WKS_FILE_DEPENDS = "grub-native grub"
WKS_FILE_DEPENDS = "syslinux-native syslinux"
# Optional variables
# GRUB_MKIMAGE_FORMAT_PC - Used to define target platform.
# GRUB_PREFIX_PATH - Used to define which directory
# grub config and modules are going
# to reside in.
GRUB_PREFIX_PATH = '/boot/grub2' # Default: /boot/grub
GRUB_MKIMAGE_FORMAT_PC = 'i386-pc' # Default: i386-pc
WICVARS:append = "\
GRUB_PREFIX_PATH \
GRUB_MKIMAGE_FORMAT_PC \
"
****************** Wic Plugin Depends/Vars ******************
**************** Example kickstart Legacy Bios Grub Boot ****************
part boot --label bios_boot --fstype ext4 --offset 1024 --fixed-size 78M
--source bootimg_pcbios --sourceparams="loader-bios=grub" --active
part roots --label rootfs --fstype ext4 --source rootfs --use-uuid
bootloader --ptable msdos --source bootimg_pcbios
**************** Example kickstart Legacy Bios Grub Boot ****************
*************** Example kickstart Legacy Bios Syslinux Boot ****************
part /boot --source bootimg_pcbios --sourceparams="loader-bios=syslinux"
--ondisk sda --label boot --fstype vfat --align 1024 --active
part roots --label rootfs --fstype ext4 --source rootfs --use-uuid
bootloader --ptable msdos --source bootimg_pcbios
"""
name = 'bootimg_pcbios'