# 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.

# Library for setting up remote access and running remote commands.

DEFAULT_PRIVATE_KEY="$SRC_ROOT/platform/testing/testing_rsa"

DEFINE_string remote "" "remote hostname/IP of running Chromium OS instance"
DEFINE_string private_key "$DEFAULT_PRIVATE_KEY" \
  "Private key of root account on remote host"

function remote_sh() {
  # Disable strict host checking so that we don't prompt the user when
  # the host key file is removed and just go ahead and add it.
  REMOTE_OUT=$(ssh -o StrictHostKeyChecking=no -o \
    UserKnownHostsFile=$TMP_KNOWN_HOSTS root@$FLAGS_remote "$@")
  return ${PIPESTATUS[0]}
}

function remote_sh_allow_changed_host_key() {
  rm -f $TMP_KNOWN_HOSTS
  remote_sh "$@"
}

function set_up_remote_access() {
  if [ -z "$SSH_AGENT_PID" ]; then
    eval `ssh-agent`
  fi
  cp $FLAGS_private_key $TMP_PRIVATE_KEY
  chmod 0400 $TMP_PRIVATE_KEY
  ssh-add $TMP_PRIVATE_KEY

  # Verify the client is reachable before continuing
  echo "Initiating first contact with remote host"
  remote_sh "true"
  echo "Connection OK"
}

function remote_access_init() {
  TMP_PRIVATE_KEY=$TMP/private_key
  TMP_KNOWN_HOSTS=$TMP/known_hosts
  if [ -z "$FLAGS_remote" ]; then
    echo "Please specify --remote=<IP-or-hostname> of the Chromium OS instance"
    exit 1
  fi
  set_up_remote_access
}