#!/bin/bash

# Copies a test tarball overlay into the Android boot image ramdisk

set -ex

if [ $# -lt 2 ]; then
	echo "Usage: $0 <boot_file> <overlay_test_file>"
	exit 1
fi

boot_file=$1
overlay_file=$2

abootimg -x $boot_file
mkdir -p ramdisk
tar -xvzf $overlay_file -C ramdisk
cd ramdisk
overlay_file=$(basename $2 .tar.gz).cpio
find . | cpio -ov -H newc > ../$overlay_file
cd ../
gzip $overlay_file
overlay_file=$overlay_file.gz
overlayed_initrd=initrd.img+$overlay_file
cat initrd.img $overlay_file > $overlayed_initrd

image_size=`du -b $boot_file | cut -f 1`
overlay_size=`gzip -l $overlay_file | tail -1 | awk '{print $2}'`
final_size=$(( $overlay_size + $image_size ))
abootimg -u $boot_file -r $overlayed_initrd -c "bootsize=$final_size"