flatcar-scripts/get_latest_image.sh
Mike Frysinger c17a493bcc setup DEFAULT_BOARD by default
Rather than forcing all consumers of DEFAULT_BOARD to remember to call
get_default_board, just do it for them automatically.

BUG=None
TEST=`cbuildbot {arm,amd64,x86}-generic-full` works
TEST=`./build_packages --help` shows correct default

Change-Id: I8d6ccb83babb2764a50692318eb9193c45fb3b39
Reviewed-on: https://gerrit.chromium.org/gerrit/17868
Reviewed-by: David James <davidjames@chromium.org>
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
2012-08-14 10:17:31 -07:00

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#!/bin/bash
# Copyright (c) 2009 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.
# Prints the path to the most recently built image to stdout.
SCRIPT_ROOT=$(dirname $(readlink -f "$0"))
. "${SCRIPT_ROOT}/common.sh" || exit 1
DEFINE_string board "$DEFAULT_BOARD" \
"The name of the board to check for images."
# Parse command line flags
FLAGS "$@" || exit 1
eval set -- "${FLAGS_ARGV}"
# Check on the board that they are trying to set up.
if [ -z "$FLAGS_board" ] ; then
die_notrace "Error: --board required."
fi
IMAGES_DIR="${DEFAULT_BUILD_ROOT}/images/${FLAGS_board}"
# If there are no images, error out since presumably the
# caller isn't doing this for fun.
if [[ ! -d ${IMAGES_DIR} ]] ; then
die_notrace \
"${IMAGES_DIR} does not exist; have you run ./build_image?"
fi
# Use latest link if it exists, otherwise most recently changed dir
if [ -L ${IMAGES_DIR}/latest ] ; then
if ! dst=$(readlink "${IMAGES_DIR}"/latest) ; then
die_notrace "Could not read ${IMAGES_DIR}/latest; have you run ./build_image?"
fi
DEFAULT_FROM="${IMAGES_DIR}/${dst}"
else
DEFAULT_FROM=$(ls -dt "$IMAGES_DIR"/*/ | head -1)
fi
echo $DEFAULT_FROM