Verify that SCRIPTS_DIR exists in build_image.

build_image

 #!/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.
 
 # Script to build a bootable keyfob-based chromeos system image from within
 # a chromiumos setup. This assumes that all needed packages have been built into
 # the given target's root with binary packages turned on. This script will
 # build the Chrome OS image using only pre-built binary packages.
 
-# --- BEGIN COMMON.SH BOILERPLATE ---
 # Load common CrOS utilities.  Inside the chroot this file is installed in
 # /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
 # location.
 find_common_sh() {
-  local common_paths=(/usr/lib/crosutils $(dirname "$(readlink -f "$0")"))
+  local common_paths=(/usr/lib/crosutils $(dirname "$0"))
   local path
 
   SCRIPT_ROOT=
   for path in "${common_paths[@]}"; do
-    if [ -r "${path}/common.sh" ]; then
+    local common="${path}/common.sh"
+    if ([ -r "${common}" ] && . "${common}" && [ -d "${SCRIPTS_DIR}" ]); then
       SCRIPT_ROOT=${path}
       break
     fi
   done
 }
 
 find_common_sh
-. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
-# --- END COMMON.SH BOILERPLATE ---
+. "${SCRIPT_ROOT}/common.sh" || ! echo "Unable to load common.sh" || exit 1
 
 # Load functions and constants for chromeos-install
 [ -f /usr/lib/installer/chromeos-common.sh ] && \
   INSTALLER_ROOT=/usr/lib/installer || \
   INSTALLER_ROOT=$(dirname "$(readlink -f "$0")")
 
 . "${INSTALLER_ROOT}/chromeos-common.sh" || \
   die "Unable to load chromeos-common.sh"
 
 locate_gpt
@@ skipping 797 matching lines @@
   echo "Developer image created as ${DEVELOPER_IMAGE_NAME}"
 fi
 
 print_time_elapsed
 
 echo "To copy to USB keyfob, do something like:"
 echo "  ./image_to_usb.sh --from=${OUTSIDE_OUTPUT_DIR} --to=/dev/sdX"
 echo "To convert to VMWare image, INSIDE the chroot, do something like:"
 echo "  ./image_to_vm.sh --from=${OUTSIDE_OUTPUT_DIR} --board=${BOARD}"
 echo "from the scripts directory where you entered the chroot."