#!/bin/sh -e
#
# Runs update-initramfs(8) to create/update an initramfs for specified
# version (if the pkg that is triggering it) or for the currently
# installed kernel otherwise.
#
# Arguments:	$1 = action [run/targets]
#		$2 = target [post-install]
#		$3 = pkgname
#		$4 = version
#
ACTION="$1"
TARGET="$2"
PKGNAME="$3"
VERSION="$4"

update_initramfs=usr/sbin/update-initramfs

case "$ACTION" in
targets)
	echo "post-install"
	;;
run)
	[ ! -x ${update_initramfs} ] && exit 0
	[ "$TARGET" != "post-install" ] && exit 1

	initramfs_args="update-initramfs"

	if [ "$PKGNAME" = "kernel" ]; then
		if [ ! -f var/lib/initramfs-tools/${VERSION} ]; then
			# Create new initramfs
			initramfs_args="-c -k ${VERSION}"
		else
			# Update existing initramfs
			initramfs_args="-u -k ${VERSION}"
		fi
	else
		# Update initramfs for all kernels
		initramfs_args="-u -k all"
	fi

	if [ ! -e /proc/filesystems ]; then
		mount -t proc proc /proc
		proc_mounted=1
	fi

	if [ ! -e /sys/kernel/vmcoreinfo ]; then
		mount -t sysfs sysfs /sys
		sys_mounted=1
	fi

	${update_initramfs} ${initramfs_args}

	if [ -n "$proc_mounted" ]; then
		umount /proc
	fi
	if [ -n "$sys_mounted" ]; then
		umount /sys
	fi
	;;
*)
	exit 1
	;;
esac

exit 0