Add simple update test to pfq.

image_to_live.sh

 #!/bin/bash
 
 # Copyright (c) 2009-2010 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.
 
 # Script to update an image onto a live running ChromiumOS instance.
 
 # Load common constants.  This should be the first executable line.
 # The path to common.sh should be relative to your script's location.
@@ skipping 245 matching lines @@
   local timeout=5
   # Let update engine receive call to ping the dev server.
   info "Devserver handling ping.  Check ${FLAGS_server_log} for more info."
   sleep ${timeout}
 
   # The devserver generates images when the update engine checks for updates.
   while [ $(get_update_var CURRENT_OP) = ${UPDATER_UPDATE_CHECK} ]; do
     echo -n "." && sleep ${timeout}
   done
 
-  info "Update generated.  Update engine downloading update."
+  info "Update generated.  Update engine preparing to start update."
+  while [ $(get_update_var CURRENT_OP) != ${UPDATER_DOWNLOADING} ]; do

[petkov, 2011/01/07 01:10:42]

you should catch UPDATER_IDLE in this loop otherwise you risk going into an
infinite loop under some error conditions

[petkov, 2011/01/07 01:15:09]

In fact, theoretically, if the update goes really fast, you may end up in
UPDATED_REBOOT_NEEDED state. So, just to be on the safe side, maybe check for
that too.

+    echo -n "." && sleep ${timeout}
+  done
+
+  info "Update engine downloading update."
   while [ $(get_update_var CURRENT_OP) = ${UPDATER_DOWNLOADING} ]; do
     echo "Download progress $(get_update_var PROGRESS)" && sleep ${timeout}
   done
 
-  info "Download complete."
+  info "Download complete.  Finalizing update."
 }
 
 
 function run_auto_update {
   # Truncate the update log so our log file is clean.
   truncate_update_log
 
   local update_args="$(get_update_args "$(get_devserver_url)")"
   info "Starting update using args ${update_args}"
 
@@ skipping 122 matching lines @@
     local release_description=$(echo ${REMOTE_OUT} | cut -d '=' -f 2)
     info "Update was successful and rebooted to $release_description"
   fi
 
   print_time_elapsed
 
   exit 0
 }
 
 main $@