#!/usr/bin/env bash

# Figure out where the Scala framework is installed
FWDIR="$(cd `dirname $0`; pwd)"

# Export this as SPARK_HOME
export SPARK_HOME="$FWDIR"

# Exit if the user hasn't compiled Spark
if [ ! -e "$SPARK_HOME/repl/target" ]; then
  echo "Failed to find Spark classes in $SPARK_HOME/repl/target" >&2
  echo "You need to compile Spark before running this program" >&2
  exit 1
fi

# Load environment variables from conf/spark-env.sh, if it exists
if [ -e $FWDIR/conf/spark-env.sh ] ; then
  . $FWDIR/conf/spark-env.sh
fi

# Figure out which Python executable to use
if [ -z "$PYSPARK_PYTHON" ] ; then
  PYSPARK_PYTHON="python"
fi
export PYSPARK_PYTHON

# Add the PySpark classes to the Python path:
export PYTHONPATH=$SPARK_HOME/python/:$PYTHONPATH

# Load the PySpark shell.py script when ./pyspark is used interactively:
export OLD_PYTHONSTARTUP=$PYTHONSTARTUP
export PYTHONSTARTUP=$FWDIR/python/pyspark/shell.py

# Launch with `scala` by default:
if [[ "$SPARK_LAUNCH_WITH_SCALA" != "0" ]] ; then
    export SPARK_LAUNCH_WITH_SCALA=1
fi

if [[ "$IPYTHON" = "1" ]] ; then
    export PYSPARK_PYTHON="ipython"
    exec "$PYSPARK_PYTHON" -i -c "%run $PYTHONSTARTUP"
else
    exec "$PYSPARK_PYTHON" "$@"
fi