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#!/usr/bin/env python3
# SPDX-FileCopyrightText: Copyright 2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
# SPDX-License-Identifier: Apache-2.0
#
# Licensed 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 json
import sys
import hashlib
from argparse import ArgumentParser
from pathlib import Path
def get_md5sum_for_file(filepath: str) -> str:
"""
Function to calculate md5sum for contents of a given file.
Parameters:
----------
filepath (string): Path to the required file.
Returns:
-------
Hex digest represented as string.
"""
md5_sum = hashlib.md5()
with open(filepath, mode='rb') as f:
buf = f.read()
md5_sum.update(buf)
return md5_sum.hexdigest()
def check_update_resources_downloaded(
resource_downloaded_dir: str, set_up_script_path: str
):
"""
Function that check if the resources downloaded need to be refreshed.
Parameters:
----------
resource_downloaded_dir (string): Specifies the path to resources_downloaded folder.
set_up_script_path (string): Specifies the path to set_up_default_resources.py file.
"""
metadata_file_path = Path(resource_downloaded_dir) / "resources_downloaded_metadata.json"
if metadata_file_path.is_file():
with open(metadata_file_path) as metadata_json:
metadata_dict = json.load(metadata_json)
md5_key = 'set_up_script_md5sum'
set_up_script_md5sum_metadata = ''
if md5_key in metadata_dict.keys():
set_up_script_md5sum_metadata = metadata_dict["set_up_script_md5sum"]
set_up_script_md5sum_current = get_md5sum_for_file(set_up_script_path)
if set_up_script_md5sum_current == set_up_script_md5sum_metadata:
return 0
# Return code 1 if the resources need to be refreshed.
print('Error: hash mismatch!')
print(f'Metadata: {set_up_script_md5sum_metadata}')
print(f'Current : {set_up_script_md5sum_current}')
return 1
# Return error code 2 if the file doesn't exists.
print(f'Error: could not find {metadata_file_path}')
return 2
if __name__ == "__main__":
parser = ArgumentParser()
parser.add_argument(
"--resource_downloaded_dir",
help="Resources downloaded directory.",
type=str,
required=True)
parser.add_argument(
"--setup_script_path",
help="Path to set_up_default_resources.py.",
type=str,
required=True)
args = parser.parse_args()
# Check validity of script path.
if not Path(args.setup_script_path).is_file():
raise ValueError(f'Invalid script path: {args.setup_script_path}')
# Check the resources are downloaded as expected
status = check_update_resources_downloaded(
args.resource_downloaded_dir,
args.setup_script_path)
sys.exit(status)
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