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# Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
# This file is part of the "cmake-common" project.
# For details, see https://github.com/egor-tensin/cmake-common.
# Distributed under the MIT License.
R'''Download & bootstrap Boost.
This script downloads and bootstraps a Boost distribution. It's main utility
is that it's supposed to be cross-platform.
Usage examples:
$ python -m project.boost.download 1.71.0
...
$ python -m project.boost.download --unpack ~/workspace/third-party/ 1.65.0
...
'''
import argparse
from contextlib import contextmanager
import logging
import sys
import urllib.request
from project.boost.archive import Archive, PermanentStorage, TemporaryStorage
from project.boost.version import Version
from project.utils import normalize_path, retry, setup_logging
@retry(urllib.request.URLError)
def _download_try_url_retry(url):
with urllib.request.urlopen(url, timeout=20) as request:
return request.read()
def _download_try_url(url):
logging.info('Trying URL: %s', url)
try:
return _download_try_url_retry(url)
except urllib.request.URLError as e:
logging.error("Couldn't download from this mirror, an error occured:")
logging.exception(e)
@contextmanager
def _download_try_all_urls(version, storage):
urls = version.get_download_urls()
for url in urls:
reply = _download_try_url(url)
if reply is None:
continue
with storage.write_archive(version, reply) as path:
yield path
return
raise RuntimeError("Couldn't download Boost from any of the mirrors")
@contextmanager
def _download_if_necessary(version, storage):
path = storage.get_archive(version)
if path is not None:
logging.info('Using existing Boost archive: %s', path)
yield path
return
with _download_try_all_urls(version, storage) as path:
yield path
class DownloadParameters:
def __init__(self, version, unpack_dir='.', cache_dir=None):
self.version = version
self.unpack_dir = normalize_path(unpack_dir)
self.storage = TemporaryStorage(unpack_dir)
if cache_dir is not None:
cache_dir = normalize_path(cache_dir)
self.storage = PermanentStorage(cache_dir)
@staticmethod
def from_args(args):
return DownloadParameters(**vars(args))
def download(params):
with _download_if_necessary(params.version, params.storage) as path:
archive = Archive(params.version, path)
boost_dir = archive.unpack(params.unpack_dir)
boost_dir.bootstrap()
def _parse_args(argv=None):
if argv is None:
argv = sys.argv[1:]
logging.info('Command line arguments: %s', argv)
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument('--unpack', metavar='DIR', dest='unpack_dir',
type=normalize_path, default='.',
help='directory to unpack the archive to')
parser.add_argument('--cache', metavar='DIR', dest='cache_dir',
type=normalize_path,
help='download directory (temporary file unless specified)')
parser.add_argument('version', metavar='VERSION',
type=Version.from_string,
help='Boost version (in the MAJOR.MINOR.PATCH format)')
return parser.parse_args(argv)
def _main(argv=None):
with setup_logging():
download(DownloadParameters.from_args(_parse_args(argv)))
if __name__ == '__main__':
_main()
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