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# Copyright (C) 2010-2012 Aleksey Lim
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
import shutil
from os.path import join, exists, dirname
from sugar_network.toolkit.spec import Spec
class BundleError(Exception):
pass
class Bundle(object):
def __init__(self, bundle, mime_type=None):
self._rootdir = False
if mime_type is None:
mime_type = _detect_mime_type(bundle) or ''
if mime_type == 'application/zip':
import zipfile
self._bundle = zipfile.ZipFile(bundle)
self._do_get_names = self._bundle.namelist
self._do_extractfile = self._bundle.open
self._do_extract = self._bundle.extract
self._do_getmember = self._bundle.getinfo
self._cast_info = _ZipInfo
elif mime_type.split('/')[-1].endswith('-tar'):
import tarfile
self._bundle = tarfile.open(bundle)
self._do_get_names = self._bundle.getnames
self._do_extractfile = self._bundle.extractfile
self._do_extract = self._bundle.extract
self._do_getmember = self._bundle.getmember
self._cast_info = lambda x: x
else:
raise BundleError('Unsupported bundle type for "%s" file, '
'it can be either tar or zip.' % bundle)
def __enter__(self):
return self
def __exit__(self, exc_type, exc_value, traceback):
self._bundle.close()
self._bundle = None
def get_names(self):
return self._do_get_names()
def extract(self, name, dst_path):
return self._do_extract(name, dst_path)
def extractfile(self, name):
return self._do_extractfile(name)
def extractall(self, dst_root, members=None, prefix=None):
if not prefix:
self._bundle.extractall(path=dst_root, members=members)
return
try:
prefix = prefix.strip(os.sep) + os.sep
for arcname in self.get_names():
dst_path = arcname.lstrip(os.sep)
if dst_path.startswith(prefix):
dst_path = dst_path[len(prefix):]
dst_path = join(dst_root, dst_path)
if dst_path.endswith(os.sep):
os.makedirs(dst_path)
else:
if not exists(dirname(dst_path)):
os.makedirs(dirname(dst_path))
with file(dst_path, 'wb') as dst:
shutil.copyfileobj(self.extractfile(arcname), dst)
except Exception:
if exists(dst_root):
shutil.rmtree(dst_root)
raise
def getmember(self, name):
return self._cast_info(self._do_getmember(name))
@property
def rootdir(self):
if self._rootdir is not False:
return self._rootdir
self._rootdir = None
for arcname in self.get_names():
parts = arcname.split(os.sep)
if len(parts) > 1:
if self._rootdir is None:
self._rootdir = parts[0]
elif parts[0] != self._rootdir:
self._rootdir = None
break
return self._rootdir
def get_spec(self):
if self.rootdir:
specs = (join(self.rootdir, 'sweets.recipe'),
join(self.rootdir, 'activity', 'activity.info'))
else:
specs = ('sweets.recipe', join('activity', 'activity.info'))
for arcname in self.get_names():
if arcname in specs:
f = self.extractfile(arcname)
try:
return Spec(f)
finally:
f.close()
def _detect_mime_type(filename):
if filename.endswith('.xo'):
return 'application/zip'
if filename.endswith('.zip'):
return 'application/zip'
if filename.endswith('.tar.bz2'):
return 'application/x-bzip-compressed-tar'
if filename.endswith('.tar.gz'):
return 'application/x-compressed-tar'
if filename.endswith('.tar.lzma'):
return 'application/x-lzma-compressed-tar'
if filename.endswith('.tar.xz'):
return 'application/x-xz-compressed-tar'
if filename.endswith('.tbz'):
return 'application/x-bzip-compressed-tar'
if filename.endswith('.tgz'):
return 'application/x-compressed-tar'
if filename.endswith('.tlz'):
return 'application/x-lzma-compressed-tar'
if filename.endswith('.txz'):
return 'application/x-xz-compressed-tar'
if filename.endswith('.tar'):
return 'application/x-tar'
class _ZipInfo(object):
def __init__(self, info):
self._info = info
@property
def name(self):
return self._info.filename
@property
def size(self):
return self._info.file_size
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