python/test_coverage/coverage_daemon.py

#
# 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.
#

import os
import imp


# This is a hack to always refer the main code rather than built zip.
main_code_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
daemon = imp.load_source("daemon", "%s/pyspark/daemon.py" % main_code_dir)

if "COVERAGE_PROCESS_START" in os.environ:
    worker = imp.load_source("worker", "%s/pyspark/worker.py" % main_code_dir)

    def _cov_wrapped(*args, **kwargs):
        import coverage
        cov = coverage.coverage(
            config_file=os.environ["COVERAGE_PROCESS_START"])
        cov.start()
        try:
            worker.main(*args, **kwargs)
        finally:
            cov.stop()
            cov.save()
    daemon.worker_main = _cov_wrapped
else:
    raise RuntimeError("COVERAGE_PROCESS_START environment variable is not set, exiting.")


if __name__ == '__main__':
    daemon.manager()