# 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.
import abc
from contextlib import contextmanager
import logging
import os.path
import shutil
import tempfile
from project.boost.directory import BoostDir
class Archive:
def __init__(self, version, path):
self.version = version
self.path = path
@property
def dir_name(self):
return self.version.dir_name
def unpack(self, dest_dir):
path = os.path.join(dest_dir, self.dir_name)
if os.path.exists(path):
raise RuntimeError(f'Boost directory already exists: {path}')
logging.info('Unpacking Boost to: %s', path)
shutil.unpack_archive(self.path, dest_dir)
return BoostDir(path)
class ArchiveStorage(abc.ABC):
@abc.abstractmethod
def get_archive(self, version):
pass
@contextmanager
@abc.abstractmethod
def write_archive(self, version, contents):
pass
class PermanentStorage(ArchiveStorage):
def __init__(self, cache_dir):
self._dir = cache_dir
def _archive_path(self, version):
return os.path.join(self._dir, version.archive_name)
def get_archive(self, version):
path = self._archive_path(version)
if os.path.exists(path):
return path
return None
@contextmanager
def write_archive(self, version, contents):
path = self._archive_path(version)
logging.info('Writing Boost archive: %s', path)
if os.path.exists(path):
raise RuntimeError(f'cannot download Boost, file already exists: {path}')
with open(path, mode='w+b') as dest:
dest.write(contents)
yield path
class TemporaryStorage(ArchiveStorage):
def __init__(self, temp_dir):
self._dir = temp_dir
def get_archive(self, version):
return None
@contextmanager
def write_archive(self, version, contents):
with tempfile.NamedTemporaryFile(prefix=f'boost_{version}_', suffix=version.archive_ext,
dir=self._dir, delete=False) as dest:
path = dest.name
logging.info('Writing Boost archive: %s', path)
dest.write(contents)
try:
yield path
finally:
logging.info('Removing temporary Boost archive: %s', path)
os.remove(path)
