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# Copyright (c) 2011, SmartFile <btimby@smartfile.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the organization nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import time
from libarchive import is_archive, Entry, SeekableArchive
from tarfile import DEFAULT_FORMAT, USTAR_FORMAT, GNU_FORMAT, PAX_FORMAT, ENCODING
from tarfile import REGTYPE, AREGTYPE, LNKTYPE, SYMTYPE, DIRTYPE, FIFOTYPE, CONTTYPE, CHRTYPE, BLKTYPE, GNUTYPE_SPARSE
FORMAT_CONVERSION = {
USTAR_FORMAT: 'tar',
GNU_FORMAT: 'gnu',
PAX_FORMAT: 'pax',
}
def is_tarfile(filename):
return is_archive(filename, formats=('tar', 'gnu', 'pax'))
def open(**kwargs):
return TarFile(**kwargs)
class TarInfo(Entry):
def __init__(self, name):
super(TarInfo, self).__init__(pathname=name)
fromtarfile = Entry.from_archive
def get_name(self):
return self.pathname
def set_name(self, value):
self.pathname = value
name = property(get_name, set_name)
@property
def get_type(self):
for attr, type in (
('isdir', DIRTYPE), ('isfile', REGTYPE), ('issym', SYMTYPE),
('isfifo', FIFOTYPE), ('ischr', CHRTYPE), ('isblk', BLKTYPE),
):
if getattr(self, attr)():
return type
def _get_missing(self):
raise NotImplemented()
def _set_missing(self, value):
raise NotImplemented()
pax_headers = property(_get_missing, _set_missing)
class TarFile(SeekableArchive):
def __init__(self, name=None, mode='r', fileobj=None, format=DEFAULT_FORMAT, tarinfo=TarInfo, encoding=ENCODING):
if name:
f = name
elif fileobj:
f = fileobj
try:
format = FORMAT_CONVERSON.get(format)
except KeyError:
raise Exception('Invalid tar format: %s' % format)
super(TarFile, self).__init__(f, mode=mode, format=format, entry_class=tarinfo, encoding=encoding)
getmember = SeekableArchive.getentry
list = SeekableArchive.printlist
extract = SeekableArchive.readpath
extractfile = SeekableArchive.readstream
def getmembers(self):
return list(self)
def getnames(self):
return list(self.iterpaths)
def next(self):
pass # TODO: how to do this?
def extract(self, member, path=None):
if path is None:
path = os.getcwd()
if isinstance(member, basestring):
f = os.path.join(path, member)
else:
f = os.path.join(path, member.pathname)
return self.readpath(member, f)
def add(self, name, arcname, recursive=True, exclude=None, filter=None):
pass # TODO: implement this.
def addfile(tarinfo, fileobj):
return self.writepath(fileobj, tarinfo)
def gettarinfo(name=None, arcname=None, fileobj=None):
if name:
f = name
elif fileobj:
f = fileobj
entry = self.entry_class.from_file(f)
if arcname:
entry.pathname = arcname
return entry
def _get_missing(self):
raise NotImplemented()
def _set_missing(self, value):
raise NotImplemented()
pax_headers = property(_get_missing, _set_missing)
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