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# Copyright 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
from io import BytesIO
import posixpath
from zipfile import ZipFile
from compiled_file_system import SingleFile
class DirectoryZipper(object):
'''Creates zip files of whole directories.
'''
def __init__(self, compiled_fs_factory, file_system):
self._file_system = file_system
self._zip_cache = compiled_fs_factory.Create(file_system,
self._MakeZipFile,
DirectoryZipper)
# NOTE: It's ok to specify SingleFile here even though this method reads
# multiple files. All files are underneath |base_dir|. If any file changes its
# stat will change, so the stat of |base_dir| will also change.
@SingleFile
def _MakeZipFile(self, base_dir, files):
base_dir = base_dir.strip('/')
zip_bytes = BytesIO()
with ZipFile(zip_bytes, mode='w') as zip_file:
futures_with_name = [
(file_name,
self._file_system.ReadSingle(posixpath.join(base_dir, file_name)))
for file_name in files]
for file_name, future in futures_with_name:
file_contents = future.Get()
if isinstance(file_contents, unicode):
# Data is sometimes already cached as unicode.
file_contents = file_contents.encode('utf8')
# We want e.g. basic.zip to expand to basic/manifest.json etc, not
# chrome/common/extensions/.../basic/manifest.json, so only use the
# end of the path component when writing into the zip file.
dir_name = posixpath.basename(base_dir)
zip_file.writestr(posixpath.join(dir_name, file_name), file_contents)
return zip_bytes.getvalue()
def Zip(self, path):
'''Creates a new zip file from the recursive contents of |path| as returned
by |_zip_cache|.
Paths within the zip file will be relative to and include the last
component of |path|, such that when zipping foo/bar containing baf.txt and
qux.txt will return a zip file which unzips to bar/baz.txt and bar/qux.txt.
'''
return self._zip_cache.GetFromFileListing(path)
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