#!/bin/bash
################################################################################
#    HPCC SYSTEMS software Copyright (C) 2012 HPCC Systems®.
#
#    Licensed under the Apache License, Version 2.0 (the "License");
#    you may not use this file except in compliance with the License.
#    You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS,
#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#    See the License for the specific language governing permissions and
#    limitations under the License.
################################################################################
#
# Uusage: hpcc-push.sh -s <source> -t <target> -n  <number_concurrent> -x
#
# This is acomplished with a standard scp command with the use of the
# runtime users id_rsa file.

###<REPLACE>###

source  ${INSTALL_DIR}/etc/init.d/hpcc_common
source  ${INSTALL_DIR}/etc/init.d/init-functions
source  ${INSTALL_DIR}/etc/init.d/export-path


usage() {
    echo ""
    echo "usage: hpcc-push.sh -s <source> -t <target> -n  <concurrent> -x"
    echo "   -n:  when specified, denotes the number of concurrent executions threads."
    echo "        The default is 5."
    echo "   -s:  source file or directory."
    echo "   -t:  target file or directory."
    echo "   -x:  when specified, this option excludes execution on the current host."
    echo ""

    exit 1

}
createScriptFile() {

   cat > $SCRIPT_FILE <<SCRIPTFILE
#~/bin/bash
IP=\$1

if ping -c 1 -w 5 -n \$IP > /dev/null 2>&1; then
    echo "\$IP: Host is alive."
    CAN_SSH="\`ssh -i $home/$user/.ssh/id_rsa -o BatchMode=yes -o LogLevel=QUIET -o StrictHostKeyChecking=no $user@\$IP exit > /dev/null 2>&1; echo \$?\`"
    if [ "\$CAN_SSH" -eq 255 ]; then
       echo "\$IP: Cannot SSH to host.";
    else
       echo "\$IP: Copying $source to $target on \$IP";
       SCP=\$(scp -r -i $home/$user/.ssh/id_rsa $source $user@\$IP:$target; echo \$?)
       if [ "\$SCP" -eq 0 ]; then
          echo "\$IP: Success";
       else
          echo "\$IP: Failure";
          exit 1
       fi
    fi
else
    echo "\$IP: Cannot Ping host? (Host Alive?)"
    exit 1
fi
SCRIPTFILE

chmod +x ${SCRIPT_FILE}
}


############################################
#
# MAIN
#
############################################
cluster_tools_init

if [ "$(whoami)" != "root" ] && [ "$(whoami)" != "${user}" ]; then
   echo ""
   echo "The script must run as root, $user or sudo."
   echo ""
   exit 1
fi


source=
target=
exclude=0
OPTION="-e ${CONFIG_DIR}/${ENV_CONF_FILE} -s ${SECTION:-DEFAULT}"


TEMP=`/usr/bin/getopt -o n:s:t:hx --long help,conrrent:,source:,target:,exclude -n 'hpcc-push' -- "$@"`
if [ $? != 0 ] ; then echo "Failure to parse commandline." >&2 ; end 1 ; fi
eval set -- "$TEMP"
while true ; do
    case "$1" in
        -n|--concurrent) 
            if [ -n "$2" ] && [[ $2 =~ ^[0-9]+$ ]]
            then
               [ $2 -gt 0 ] &&  $OPTION="${OPTION:+"$OPTION "}-n $2"
            fi
            shift 2 ;;
        -s|--source) source="$2"
            shift 2 ;;
        -t|--target) target="$2"
            shift 2 ;;
        -x|--exclude) OPTION="${OPTION:+"$OPTION "}-x"
            exclude=1
            shift ;;
        -h|--help) usage
            shift ;;
        --) shift ; break ;;
        *) usage ;;
    esac
done


if [ -z "$source"  ] || [ -z "$target" ]; then
   usage
fi


SCRIPT_FILE=~/hpcc-push_$$
createScriptFile

python_expected_version=3.4
is_python_installed ${python_expected_version}
if [ $? -eq 0 ]
then
   eval ${INSTALL_DIR}/sbin/cluster_script.py -f ${SCRIPT_FILE} $OPTION
else
   echo ""
   echo "Cannot detect python version ${python_expected_version}+. Will run on the cluster hosts sequentially."
   echo ""
   run_cluster ${SCRIPT_FILE} ${exclude}
fi

rm -rf ${SCRIPT_FILE}