#!/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.
#

set -o pipefail
set -e

# This variable indicates which coverage executable to run to combine coverages
# and generate HTMLs, for example, 'coverage3' in Python 3.
COV_EXEC="${COV_EXEC:-coverage}"
FWDIR="$(cd "`dirname $0`"; pwd)"
pushd "$FWDIR" > /dev/null

# Ensure that coverage executable is installed.
if ! hash $COV_EXEC 2>/dev/null; then
  echo "Missing coverage executable in your path, skipping PySpark coverage"
  exit 1
fi

# Set up the directories for coverage results.
export COVERAGE_DIR="$FWDIR/test_coverage"
rm -fr "$COVERAGE_DIR/coverage_data"
rm -fr "$COVERAGE_DIR/htmlcov"
mkdir -p "$COVERAGE_DIR/coverage_data"

# Current directory are added in the python path so that it doesn't refer our built
# pyspark zip library first.
export PYTHONPATH="$FWDIR:$PYTHONPATH"
# Also, our sitecustomize.py and coverage_daemon.py are included in the path.
export PYTHONPATH="$COVERAGE_DIR:$PYTHONPATH"

# We use 'spark.python.daemon.module' configuration to insert the coverage supported workers.
export SPARK_CONF_DIR="$COVERAGE_DIR/conf"

# This environment variable enables the coverage.
export COVERAGE_PROCESS_START="$FWDIR/.coveragerc"

./run-tests "$@"

# Don't run coverage for the coverage command itself
unset COVERAGE_PROCESS_START

# Coverage could generate empty coverage data files. Remove it to get rid of warnings when combining.
find $COVERAGE_DIR/coverage_data -size 0 -print0 | xargs -0 rm
echo "Combining collected coverage data under $COVERAGE_DIR/coverage_data"
$COV_EXEC combine
echo "Reporting the coverage data at $COVERAGE_DIR/coverage_data/coverage"
$COV_EXEC report --include "pyspark/*"
echo "Generating HTML files for PySpark coverage under $COVERAGE_DIR/htmlcov"
$COV_EXEC html --ignore-errors --include "pyspark/*" --directory "$COVERAGE_DIR/htmlcov"

popd
