Print last 200 lines of update_engine.log from failed update.

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 328 matching lines @@
     warn "Machine is in a bad state.  Rebooting it now."
     remote_reboot
   fi
 
   if [ -z "${FLAGS_update_url}" ]; then
     # Start local devserver if no update url specified.
     start_dev_server
   fi
 
   if [ ${FLAGS_update} -eq ${FLAGS_TRUE} ] && ! run_auto_update; then
+    warn "Dumping update_engine.log for debugging and/or bug reporting."
+    tail -n 200 "${FLAGS_update_log}" >&2
     die "Update was not successful."
   fi
 
   if [ ${FLAGS_update_stateful} -eq ${FLAGS_TRUE} ] && \
       ! run_stateful_update; then
     warn "Stateful update was not successful."
   fi
 
   remote_reboot
 
@@ skipping 13 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 $@