#!/bin/bash --posix
#
# Shell script for starting the Spark Shell REPL
# Options:
#    -m            Set MASTER to spark://$SPARK_MASTER_IP:$SPARK_MASTER_PORT
#    -c <cores>    Set the number of cores for REPL to use
#
FWDIR="`dirname $0`"

for o in "$@"; do
  if [ "$1" = "-m" -o "$1" = "--master" ]; then
    shift
    if [ -e "$FWDIR/conf/spark-env.sh" ]; then
      . "$FWDIR/conf/spark-env.sh"
    fi
    if [ -z "$MASTER" ]; then
      MASTER="spark://${SPARK_MASTER_IP}:${SPARK_MASTER_PORT}"
    fi
    export MASTER
  fi

  if [ "$1" = "-c" -o "$1" = "--cores" ]; then
    shift
    if [ -n "$1" ]; then
      OPTIONS="-Dspark.cores.max=$1"
      shift
    fi
  fi
done

# Copy restore-TTY-on-exit functions from Scala script so spark-shell exits properly even in
# binary distribution of Spark where Scala is not installed
exit_status=127
saved_stty=""

# restore stty settings (echo in particular)
function restoreSttySettings() {
  stty $saved_stty
  saved_stty=""
}

function onExit() {
  if [[ "$saved_stty" != "" ]]; then
    restoreSttySettings
  fi
  exit $exit_status
}

# to reenable echo if we are interrupted before completing.
trap onExit INT

# save terminal settings
saved_stty=$(stty -g 2>/dev/null)
# clear on error so we don't later try to restore them
if [[ ! $? ]]; then
  saved_stty=""
fi

$FWDIR/run $OPTIONS spark.repl.Main "$@"

# record the exit status lest it be overwritten:
# then reenable echo and propagate the code.
exit_status=$?
onExit