grub2/99-grub-mkconfig.install

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#!/bin/bash
if ! [[ $KERNEL_INSTALL_MACHINE_ID ]]; then
exit 0
fi
# PV and PVH Xen DomU guests boot with pygrub that doesn't have BLS support,
# also Xen Dom0 use the menuentries from 20_linux_xen and not the ones from
# 10_linux. So BLS support needs to be disabled for both Xen Dom0 and DomU.
if [[ -e /sys/hypervisor/type ]] && grep -q "^xen$" /sys/hypervisor/type; then
RUN_MKCONFIG=true
DISABLE_BLS=true
fi
ARCH=$(uname -m)
# Older ppc64le OPAL firmware (petitboot version < 1.8.0) don't have BLS support
# so grub2-mkconfig has to be run to generate a config with menuentry commands.
if [[ $ARCH = "ppc64le" ]] && [ -d /sys/firmware/opal ]; then
petitboot_path="/sys/firmware/devicetree/base/ibm,firmware-versions/petitboot"
if test -e ${petitboot_path}; then
read -r -d '' petitboot_version < ${petitboot_path}
petitboot_version="$(echo ${petitboot_version//v})"
major_version="$(echo ${petitboot_version} | cut -d . -f1)"
minor_version="$(echo ${petitboot_version} | cut -d . -f2)"
if test -z ${petitboot_version} || test ${major_version} -lt 1 || \
test ${major_version} -eq 1 -a ${minor_version} -lt 8; then
RUN_MKCONFIG=true
fi
else
RUN_MKCONFIG=true
fi
fi
if [[ $DISABLE_BLS = "true" ]]; then
if grep -q '^GRUB_ENABLE_BLSCFG="*true"*\s*$' /etc/default/grub; then
sed -i 's/^GRUB_ENABLE_BLSCFG=.*/GRUB_ENABLE_BLSCFG=false/' /etc/default/grub
fi
fi
# A traditional grub configuration file needs to be generated only in the case when
# the bootloaders are not capable of populating a menu entry from the BLS fragments.
if [[ $RUN_MKCONFIG != "true" ]]; then
exit 0
fi
[[ -f /etc/default/grub ]] && . /etc/default/grub
COMMAND="$1"
case "$COMMAND" in
add|remove)
grub2-mkconfig --no-grubenv-update -o /boot/grub2/grub.cfg >& /dev/null
;;
*)
;;
esac