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#!/usr/bin/env python3
# Copyright 2020 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""This script merges code coverage profiles from multiple steps.
This script is taken from the chromium build tools and is synced
manually on an as-needed basis:
https://source.chromium.org/chromium/chromium/src/+/master:testing/merge_scripts/code_coverage/merge_steps.py?q=merge_steps.py&ss=chromium
"""
import argparse
import os
import sys
import merge_lib as merger
def _merge_steps_argument_parser(*args, **kwargs):
parser = argparse.ArgumentParser(*args, **kwargs)
parser.add_argument('--input-dir', required=True, help=argparse.SUPPRESS)
parser.add_argument(
'--output-file', required=True, help='where to store the merged data')
parser.add_argument(
'--llvm-profdata', required=True, help='path to llvm-profdata executable')
parser.add_argument(
'--profdata-filename-pattern',
default='.*',
help='regex pattern of profdata filename to merge for current test type. '
'If not present, all profdata files will be merged.')
# TODO(crbug.com/1077304) - migrate this to sparse=False as default, and have
# --sparse to set sparse
parser.add_argument(
'--no-sparse',
action='store_false',
dest='sparse',
help='run llvm-profdata without the sparse flag.')
# TODO(crbug.com/1077304) - The intended behaviour is to default sparse to
# false. --no-sparse above was added as a workaround, and will be removed.
# This is being introduced now in support of the migration to intended
# behavior. Ordering of args matters here, as the default is set by the former
# (sparse defaults to False because of ordering. See merge_results unit tests
# for details)
parser.add_argument(
'--sparse',
action='store_true',
dest='sparse',
help='run llvm-profdata with the sparse flag.')
return parser
def main():
desc = "Merge profdata files in <--input-dir> into a single profdata."
parser = _merge_steps_argument_parser(description=desc)
params = parser.parse_args()
merger.merge_profiles(params.input_dir, params.output_file, '.profdata',
params.llvm_profdata, params.profdata_filename_pattern,
sparse=params.sparse)
if __name__ == '__main__':
sys.exit(main())
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