sugar-toolkit-gtk3/sugar/bundle/bundle.py

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# Copyright (C) 2007, Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
"""Sugar bundle file handler"""
import os
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import logging
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import StringIO
import zipfile
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class AlreadyInstalledException(Exception):
pass
class NotInstalledException(Exception):
pass
class InvalidPathException(Exception):
pass
class ZipExtractException(Exception):
pass
class RegistrationException(Exception):
pass
class MalformedBundleException(Exception):
pass
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class Bundle:
"""A Sugar activity, content module, etc.
The bundle itself may be either a zip file or a directory
hierarchy, with metadata about the bundle stored various files
inside it.
This is an abstract base class. See ActivityBundle and
ContentBundle for more details on those bundle types.
"""
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_zipped_extension = None
_unzipped_extension = None
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def __init__(self, path):
self._path = path
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self._zip_root_dir = None
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if os.path.isdir(self._path):
self._unpacked = True
else:
self._unpacked = False
self._check_zip_bundle()
# manifest = self._get_file(self._infodir + '/contents')
# if manifest is None:
# raise MalformedBundleException('No manifest file')
#
# signature = self._get_file(self._infodir + '/contents.sig')
# if signature is None:
# raise MalformedBundleException('No signature file')
def _check_zip_bundle(self):
zip_file = zipfile.ZipFile(self._path)
file_names = zip_file.namelist()
if len(file_names) == 0:
raise MalformedBundleException('Empty zip file')
if file_names[0] == 'mimetype':
del file_names[0]
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self._zip_root_dir = file_names[0].split('/')[0]
if self._unzipped_extension is not None:
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(name_, ext) = os.path.splitext(self._zip_root_dir)
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if ext != self._unzipped_extension:
raise MalformedBundleException(
'All files in the bundle must be inside a single ' +
'directory whose name ends with "%s"' %
self._unzipped_extension)
for file_name in file_names:
if not file_name.startswith(self._zip_root_dir):
raise MalformedBundleException(
'All files in the bundle must be inside a single ' +
'top-level directory')
def _get_file(self, filename):
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f = None
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if self._unpacked:
path = os.path.join(self._path, filename)
if os.path.isfile(path):
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f = open(path)
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else:
zip_file = zipfile.ZipFile(self._path)
path = os.path.join(self._zip_root_dir, filename)
try:
data = zip_file.read(path)
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f = StringIO.StringIO(data)
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except KeyError:
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logging.debug('%s not found.' % filename)
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zip_file.close()
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return f
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def get_path(self):
"""Get the bundle path."""
return self._path
def _unzip(self, install_dir):
if self._unpacked:
raise AlreadyInstalledException
if not os.path.isdir(install_dir):
os.mkdir(install_dir, 0775)
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# zipfile provides API that in theory would let us do this
# correctly by hand, but handling all the oddities of
# Windows/UNIX mappings, extension attributes, deprecated
# features, etc makes it impractical.
# FIXME: use manifest
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if os.spawnlp(os.P_WAIT, 'unzip', 'unzip', '-o', self._path,
'-x', 'mimetype', '-d', install_dir):
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raise ZipExtractException
def _zip(self, bundle_path):
if not self._unpacked:
raise NotInstalledException
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raise NotImplementedError
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def _uninstall(self, install_path):
if not os.path.isdir(install_path):
raise InvalidPathException
if self._unzipped_extension is not None:
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(name_, ext) = os.path.splitext(install_path)
if ext != self._unzipped_extension:
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raise InvalidPathException
for root, dirs, files in os.walk(install_path, topdown=False):
for name in files:
os.remove(os.path.join(root, name))
for name in dirs:
os.rmdir(os.path.join(root, name))
os.rmdir(install_path)