#!/bin/bash
#
# Copyright 2014 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

set -eux
set -o pipefail

source $_LIB/img-functions

function cleanup_old_kernel_initrd()
{
    KERNEL_VERSION=${KERNEL#vmlinuz-}
    if [ -n "${BOOTDIR}" ] ; then
        for file in `ls $BOOTDIR/vmlinuz-* | grep -v $KERNEL_VERSION | grep -v debug`
        do
            echo "Removing unnecessary kernels and ramdisk images from image."
            file=$(basename $file)
            rm -Rvf $BOOTDIR/*${file#vmlinuz-}*
        done
    fi
}

# Dig up the initrd and kernel.
select_boot_kernel_initrd $TARGET_ROOT
BOOTDIR=$TARGET_ROOT/boot

# Select_boot_kernel has support for redhat/debian/openSuSE
# openSuSE has a built-in logic to delete old kernels
# Hence cleanup_old_kernel will be used only for redhat and debian derived distros.
if [ -f $TARGET_ROOT/etc/redhat-release -o -f $TARGET_ROOT/etc/debian_version ] ; then
    cleanup_old_kernel_initrd
fi