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#!/bin/bash
# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Changes the channel on a Chrome OS image.
# Load common constants and variables.
. "$(dirname "$0")/common.sh"
set -e
if [ $# -ne 2 ]; then
cat <<EOF
Usage: $PROG <image.bin> <channel>
<image.bin>: Path to image.
<channel>: The new channel of the image.
EOF
exit 1
fi
main() {
local image=$1
local to=$2
local rootfs lsb
rootfs=$(make_temp_dir)
lsb="${rootfs}/etc/lsb-release"
mount_image_partition "${image}" 3 "${rootfs}"
# Get the current channel on the image.
local from=$(grep '^CHROMEOS_RELEASE_TRACK=' "${lsb}" | cut -d '=' -f 2)
from=${from%"-channel"}
echo "Current channel is '${from}'. Changing to '${to}'."
local sudo
if [[ ! -w ${lsb} ]] ; then
sudo="sudo"
fi
${sudo} sed -i "s/\b${from}\b/${to}/" "${lsb}" &&
echo "Channel change successful."
cat "${lsb}"
}
main "$@"
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