#!/usr/bin/env bash

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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.
#

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

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

SCALA_VERSION=2.10

# Exit if the user hasn't compiled Spark
if [ ! -f "$FWDIR/RELEASE" ]; then
  # Exit if the user hasn't compiled Spark
  ls "$FWDIR"/assembly/target/scala-$SCALA_VERSION/spark-assembly*hadoop*.jar >& /dev/null
  if [[ $? != 0 ]]; then
    echo "Failed to find Spark assembly in $FWDIR/assembly/target" >&2
    echo "You need to build Spark with sbt/sbt assembly before running this program" >&2
    exit 1
  fi
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

if [ -n "$IPYTHON_OPTS" ]; then
  IPYTHON=1
fi

if [[ "$IPYTHON" = "1" ]] ; then
  exec ipython $IPYTHON_OPTS
else
  exec "$PYSPARK_PYTHON" "$@"
fi