blob: 16ea0c17a650cb6f31a6793c51965c81fa0b52e3 [file] [log] [blame]
# Copyright 2021 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Utilities for working with code coverage files."""
import json
import logging
import os
from chromite.lib import osutils
def GetLlvmJsonCoverageDataIfValid(path_to_file: str):
"""Gets the content of a file if it matches the llvm coverage json format.
path_to_file: The path of the file to read.
The file contents if they match the llvm json structure, otherwise None.
# Only coverage.json files matter for llvm json coverage.
if os.path.basename(path_to_file) != 'coverage.json':
return None
# Make sure the file exists.
if not os.path.isfile(path_to_file):
return None
# Attempt to parse as json. It's fine for this to fail,
# it means we can't manipulate it rather than an actual error.
data = json.loads(osutils.ReadFile(path_to_file))
# Validate the file structure is:
# { data: [...], type: "..", version: "..." }.
if 'data' not in data or 'type' not in data or 'version' not in data:
return None
if data['type'] != 'llvm.coverage.json.export':
return None
return data
except Exception as e:
logging.warning('GetLlvmJsonCoverageDataIfValid failed %s', e)
return None