Allow specifying an alternate config file URL on the commandline.

user_tools/linux/recovery.sh

 #!/bin/sh
 #
 # 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.
 #
 # This attempts to guide linux users through the process of putting a recovery
 # image onto a removeable USB drive.
 #
 # We may not need root privileges if we have the right permissions.
 #
 set -eu
 
 ##############################################################################
 # Configuration goes here
 
 # Where should we do our work? Use 'WORKDIR=' to make a temporary directory,
 # but using a persistent location may let us resume interrupted downloads or
 # run again without needing to download a second time.
 WORKDIR=/tmp/tmp.crosrec
 
-# Where do we look for the config file?
-CONFIGURL='http://www.chromium.org/some/random/place.cfg'
+# Where do we look for the config file? Note that we can override this by just
+# specifying the config file URL on the command line.
+CONFIGURL="${1:-http://www.chromium.org/some/random/place.cfg}"
 
 # What version is this script? It must match the 'recovery_tool_version=' value
 # in the config file that we'll download.
 MYVERSION='1.0'
 
 
 ##############################################################################
 # Some temporary filenames
 debug='debug.log'
 tmpfile='tmp.txt'
@@ skipping 700 matching lines @@
   ufatal "Unable to write the image."
 sync
 
 echo "
 
 Done. Remove the USB drive and insert it in your Chrome OS netbook.
 
 "
 
 exit 0