#!/bin/bash

# Copyright (c) 2012 NTT DOCOMO, INC. 
# Copyright 2013 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 -e

SCRIPTNAME=$(basename $0)
SCRIPT_HOME=$(dirname $0)
export _DIR=$(dirname $0)
export _LIB=${_DIR}/../lib
source $_LIB/die

function show_options () {
    echo "Options:"
    echo "    -m PATH -- Path to find lib/modules. Default /"
    echo "    -k VERSION -- Kernel version. Default $(uname -r)"
    echo "    -h -- This help"
    echo "    -o FILENAME -- Output file"
    echo "    -x -- turn on tracing"
    echo
    echo "ELEMENTS_PATH will allow you to specify multiple locations for the elements."
    exit 0
}

TEMP=$(getopt -o m:k:ho:x -n $SCRIPTNAME -- "$@")
if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi

# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"

while true ; do
    case "$1" in
        -m) export MODULE_ROOT=$2; shift 2 ;;
        -k) export KERNEL_VERSION=$2; shift 2 ;;
        -o) export IMAGE_NAME=$2; shift 2 ;;
        -h) show_options;;
        -x) shift; set -x;;
        --) shift ; break ;;
        *) echo "Internal error!" ; exit 1 ;;
    esac
done
for arg do IMAGE_ELEMENT="$IMAGE_ELEMENT $arg" ; done

source $_LIB/ramdisk-defaults
source $_LIB/common-functions
source $_LIB/ramdisk-functions

IMAGE_ELEMENT=$($SCRIPT_HOME/element-info --expand-dependencies $IMAGE_ELEMENT)

echo "Building element(s): ${IMAGE_ELEMENT}"

echo "Discovering binary dependencies"
ensure_binaries

INIT="$_DIR/../scripts/init"
FUNCTIONS_D="$_DIR/../scripts/d"

MODULE_DIR=$MODULE_ROOT/lib/modules/$KERNEL_VERSION
FIRMWARE_DIR=$MODULE_ROOT/lib/firmware

if [ ! -d "$MODULE_DIR" ]; then
	echo "ERROR: kernel module directory not found at $MODULE_DIR"
	exit 1
fi

LIB_UDEV=$LIB_UDEV_ROOT/lib/udev

if [ ! -d "$LIB_UDEV" ]; then
	echo "ERROR: udev directory not found at $LIB_UDEV"
	exit 1
fi

mk_build_dir
mkdir -p $TMP_BUILD_DIR/mnt
TMP_MOUNT_PATH=$TMP_BUILD_DIR/mnt

echo "working in $TMP_MOUNT_PATH"

create_base
populate_lib
populate_busybox
populate_init
populate_udev
finalise_image
save_image $IMAGE_NAME