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#!/usr/bin/python
# -*- coding: utf-8 -*-
#################################################################################
# LAYMAN TAR OVERLAY HANDLER
#################################################################################
# File: tar.py
#
# Handles tar overlays
#
# Copyright:
# (c) 2005 - 2008 Gunnar Wrobel
# Distributed under the terms of the GNU General Public License v2
#
# Author(s):
# Gunnar Wrobel <wrobel@gentoo.org>
#
''' Tar overlay support.'''
__version__ = "$Id: tar.py 310 2007-04-09 16:30:40Z wrobel $"
#===============================================================================
#
# Dependencies
#
#-------------------------------------------------------------------------------
import os, os.path, sys, urllib2, shutil
import xml.etree.ElementTree as ET # Python 2.5
from layman.utils import path, ensure_unicode
from layman.overlays.overlay import Overlay
#===============================================================================
#
# Class TarOverlay
#
#-------------------------------------------------------------------------------
class TarOverlay(Overlay):
''' Handles tar overlays.
A dummy tar handler that overwrites the __init__ method
so that we don't need to provide xml input:
>>> from layman.debug import OUT
>>> class DummyTar(TarOverlay):
... def __init__(self):
... self.name = 'dummy'
... here = os.path.dirname(os.path.realpath(__file__))
... self.src = 'file://' + here + '/../tests/testfiles/layman-test.tar.bz2'
... self.subpath = 'layman-test'
... self.quiet = False
... self.config = {'tar_command':'/bin/tar'}
>>> testdir = os.tmpnam()
>>> os.mkdir(testdir)
>>> a = DummyTar()
>>> OUT.color_off()
>>> a.add(testdir) #doctest: +ELLIPSIS
* Running command "/bin/tar -v -x -f...
>>> sorted(os.listdir(testdir + '/dummy'))
['app-admin', 'app-portage']
>>> shutil.rmtree(testdir)
'''
type = 'Tar'
type_key = 'tar'
def __init__(self, xml, config, ignore = 0, quiet = False):
Overlay.__init__(self, xml, config, ignore)
_subpath = xml.find('subpath')
if _subpath != None:
self.subpath = ensure_unicode(_subpath.text.strip())
elif 'subpath' in xml.attrib:
self.subpath = ensure_unicode(xml.attrib['subpath'])
else:
self.subpath = ''
_category = xml.find('category')
if _category != None:
self.category = ensure_unicode(_category.text.strip())
elif 'category' in xml.attrib:
self.category = ensure_unicode(xml.attrib['category'])
else:
self.category = ''
if self.subpath and self.category:
raise Exception('Cannot use "category" and "subpath" at the same time!')
def __eq__(self, other):
res = super(TarOverlay, self).__eq__(other) \
and self.subpath == other.subpath \
and self.category == other.category
return res
def __ne__(self, other):
return not self.__eq__(other)
# overrider
def to_xml(self):
repo = super(TarOverlay, self).to_xml()
if self.subpath:
_subpath = ET.Element('subpath')
_subpath.text = self.subpath
repo.append(_subpath)
if self.category:
_category = ET.Element('category')
_category.text = self.category
repo.append(_category)
return repo
def add(self, base, quiet = False):
'''Add overlay.'''
self.supported()
mdir = path([base, self.name])
if os.path.exists(mdir):
raise Exception('Directory ' + mdir + ' already exists. Will not ov'
'erwrite its contents!')
ext = '.noidea'
for i in [('tar.%s' % e) for e in ('bz2', 'gz', 'lzma', 'xz', 'Z')] \
+ ['tgz', 'tbz', 'taz', 'tlz', 'txz']:
candidate_ext = '.%s' % i
if self.src.endswith(candidate_ext):
ext = candidate_ext
break
try:
tar = urllib2.urlopen(self.src).read()
except Exception, error:
raise Exception('Failed to fetch the tar package from: '
+ self.src + '\nError was:' + str(error))
pkg = path([base, self.name + ext])
try:
out_file = open(pkg, 'w')
out_file.write(tar)
out_file.close()
except Exception, error:
raise Exception('Failed to store tar package in '
+ pkg + '\nError was:' + str(error))
if self.subpath:
target = path([base, 'tmp'])
else:
if self.category:
target = mdir + '/' + self.category
else:
target = mdir
os.makedirs(target)
result = self.cmd(self.command() + u' -v -x' + u' -f "' + pkg
+ u'" -C "' + target + u'"')
if self.subpath:
source = target + '/' + self.subpath
if os.path.exists(source):
try:
os.rename(source, mdir)
except Exception, error:
raise Exception('Failed to rename tar subdirectory ' +
source + ' to ' + mdir + '\nError was:'
+ str(error))
else:
raise Exception('Given subpath "' + source + '" does not exist '
' in the tar package!')
try:
shutil.rmtree(target)
except Exception, error:
raise Exception('Failed to remove unnecessary tar structure "'
+ target + '"\nError was:' + str(error))
os.unlink(pkg)
return result
def sync(self, base, quiet = False):
'''Sync overlay.'''
self.supported()
self.delete(base)
self.add(base)
def supported(self):
'''Overlay type supported?'''
return Overlay.supported(self, [(self.command(), 'tar', 'app-arch/tar'), ])
if __name__ == '__main__':
import doctest
# Ignore warnings here. We are just testing
from warnings import filterwarnings, resetwarnings
filterwarnings('ignore')
doctest.testmod(sys.modules[__name__])
resetwarnings()
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