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#! /usr/bin/env python
# -*- coding: utf-8 -*-
# COPYRIGHT NOTICE STARTS HERE
# Copyright 2019 © Samsung Electronics Co., Ltd.
#
# 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.
# COPYRIGHT NOTICE ENDS HERE
import progressbar
import concurrent.futures
from distutils.spawn import find_executable
progressbar.streams.wrap_stdout()
progressbar.streams.wrap_stderr()
def load_list(item_list):
"""
Parse list with items to be downloaded.
:param item_list: File with list of items (1 line per item)
:return: set of items from file
"""
with open(item_list, 'r') as f:
return {item for item in (line.strip() for line in f) if item}
def init_progress(items_name):
progress_widgets = ['Downloading {}: '.format(items_name),
progressbar.Bar(), ' ',
progressbar.Percentage(), ' ',
'(', progressbar.SimpleProgress(), ')']
progress = progressbar.ProgressBar(widgets=progress_widgets,
poll_rate=1.0,
redirect_stdout=True)
return progress
def start_progress(progress, target_count, skipping, log):
log_skipping(skipping, log)
log.info("Initializing download. Takes a while.")
progress.max_value = target_count
progress.start()
progress.update(len(skipping))
def log_skipping(skipping_iterable, logger):
for skipped in skipping_iterable:
logger.info('Skipping: {}'.format(skipped))
def run_concurrent(workers, progress, fn, iterable, *args):
with concurrent.futures.ThreadPoolExecutor(max_workers=workers) as executor:
futures = [executor.submit(fn, item, *args) for item in iterable]
error_count = 0
for future in concurrent.futures.as_completed(futures):
error = future.exception()
if error:
error_count += 1
progress.update()
else:
progress.update(progress.value +1)
return error_count
def finish_progress(progress, error_count, log):
progress.finish(dirty=error_count > 0)
log.info('Download ended. Elapsed time {}'.format(progress.data()['time_elapsed']))
def check_tool(name):
return find_executable(name)
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