Tiny bit of clean up and follow new script naming convention.

cros_download_latest_image

 #!/bin/bash
 
-# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
+# Copyright (c) 2010 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.
 
 # Downloads the latest buildbot image and prints the path to it.
-# This only works internally at Google.
+# This script only works if you have access to buildbot images.
 
 # Load common constants.  This should be the first executable line.
 # The path to common.sh should be relative to your script's location.
 . "$(dirname "$0")/common.sh"
 
 get_default_board
 
 DEFINE_string board "$DEFAULT_BOARD" \
   "The name of the board to check for images."
 DEFINE_boolean incremental "${FLAGS_FALSE}" "Download incremental build"
 
-# Parse command line flags
+# 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
-  echo "Error: --board required."
-  exit 1
+  die "Error: --board required."
 fi
 
 IMAGES_DIR="${DEFAULT_BUILD_ROOT}/images/${FLAGS_board}"
 
 if [ $FLAGS_board = x86-generic ]; then
   if [ "$FLAGS_incremental" -eq "$FLAGS_TRUE" ]; then
     URL_PREFIX="http://codg174.jail.google.com/archive/x86-generic-inc"
   else
     URL_PREFIX="http://codg163.jail.google.com/archive/x86-generic-rel"
   fi
 else
-  echo "Unrecognized board: $FLAGS_board" >&2
-  exit 1
+  die "Unrecognized board: $FLAGS_board" >&2

[davidjames, 2010/06/22 21:20:54]

No need for >&2 here anymore, since you're using "die"

 fi
 
 LATEST_BUILD=$(curl -s $URL_PREFIX/LATEST)
 LATEST_IMAGE_DIR="$IMAGES_DIR/$LATEST_BUILD"
 if [ ! -e $LATEST_IMAGE_DIR/chromiumos_base_image.bin ]; then
   mkdir -p $LATEST_IMAGE_DIR
   curl $URL_PREFIX/$LATEST_BUILD/image.zip -o $LATEST_IMAGE_DIR/image.zip \
       || die "Could not download image.zip"
   ( cd $LATEST_IMAGE_DIR && unzip -qo image.zip ) \
       || die "Could not unzip image.zip"
 fi
 
 echo $LATEST_IMAGE_DIR
 exit 0