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# 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 2 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 Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Copyright 2005 Duke University
# Copyright 2007 Jonathan Dieter
import os
from yum import misc
from yum import Errors
from yum import types
from urlgrabber.grabber import URLGrabError
import deltarpm
def verifyDelta(fo, po, conduit, raiseError):
"""verifies the deltarpm is what we expect it to be
raiseError = defaults to 0 - if 1 then will raise
a URLGrabError if the file does not check out.
otherwise it returns false for a failure, true for success"""
if type(fo) is types.InstanceType:
fo = fo.filename
try:
verifyChecksum(fo, po.returnSimple('deltachecksumtype'), po.returnSimple('deltachecksum'))
except:
if raiseError:
raise URLGrabError(-1, 'Package does not match intended download')
else:
return False
return True
def verifyChecksum(filename, checksumType, csum):
"""Verify the checksum of the file versus the
provided checksum"""
try:
filesum = misc.checksum(checksumType, filename)
except Errors.MiscError, e:
raise URLGrabError(-3, 'Could not perform checksum')
if filesum != csum:
raise URLGrabError(-1, 'Package does not match checksum')
return 0
def downloadPkgs(conduit, pkglist):
"""download list of package objects handed to you, return errors"""
opts, commands = conduit.getCmdLine()
errors = {}
def adderror(po, msg):
errors.setdefault(po, []).append(msg)
# Check whether drpm is already downloaded
repo_cached = False
remote_pkgs = []
rebuild_pkgs = []
for po in conduit.getDownloadPackages():
if hasattr(po, 'has_drpm') and po.has_drpm:
po.to.pkgtup = po.to.realpkgtup
local = po.returnSimple('deltalocalpath')
if os.path.exists(local):
cursize = os.stat(local)[6]
totsize = long(po.returnSimple('deltasize'))
try:
verifyChecksum(local, po.returnSimple('deltachecksumtype'), po.returnSimple('deltachecksum'))
except:
if po.repo.p_repo.cache:
repo_cached = True
adderror(po, 'package fails checksum but caching is '
'enabled for %s' % po.repo.p_repo.id)
if cursize >= totsize: # otherwise keep it around for regetting
os.unlink(local)
else:
# Deltarpm is local and good, let's put it in the rebuild list
conduit.info(5, "using local copy of deltarpm for %s" % po)
rebuild_pkgs.append(po)
continue
remote_pkgs.append(po)
# Download deltarpms
i = 0
for po in remote_pkgs:
i += 1
checkfunc = (verifyDelta, (po, conduit, 1), {})
cache = po.repo.p_repo.http_caching != 'none'
dirstat = os.statvfs(po.repo.deltasdir)
if (dirstat.f_bavail * dirstat.f_bsize) <= long(po.size):
adderror(po, 'Insufficient space in download directory %s '
'to download' % po.repo.deltasdir)
continue
po.simple['reallocalpath'] = po.localpath
po.localpath = po.returnSimple('deltalocalpath')
po.simple['realrelativepath'] = po.returnSimple('relativepath')
po.simple['relativepath'] = po.returnSimple('deltarelativepath')
try:
text = '(%s/%s): %s' % (i, len(remote_pkgs), os.path.basename(po.returnSimple('deltarelativepath')))
deltalocal = po.repo.p_repo.getPackage(po, checkfunc=checkfunc, text=text, cache=cache)
except Errors.RepoError, e:
adderror(po, str(e))
else:
rebuild_pkgs.append(po)
po.simple['deltalocalpath'] = deltalocal
if errors.has_key(po):
del errors[po]
po.simple['relativepath'] = po.returnSimple('realrelativepath')
po.localpath = po.returnSimple('reallocalpath')
if po.simple.has_key('realpackagesize'):
po.simple['packagesize'] = po.returnSimple('realpackagesize')
del po.simple['realpackagesize']
del po.simple['realrelativepath']
del po.simple['reallocalpath']
# Rebuild rpms from downloaded deltarpms
for po in rebuild_pkgs:
deltalocal = po.returnSimple('deltalocalpath')
drpm = deltarpm.DeltaRpmWrapper(conduit)
try:
conduit.info(2, "Building %s from %s" % (os.path.basename(po.localpath), os.path.basename(deltalocal)))
drpm.apply(po.localpath, deltalocal)
except:
conduit.info(2, "Error rebuilding rpm from %s! Will download full package." % os.path.basename(deltalocal))
try:
os.unlink(po.localpath)
except:
pass
else:
# Set package type to local, so yum doesn't try to download it later
# po.pkgtype = "local" # If we set this, we can't auto-install public keys
# and yum is smart enough to detect the full rpm and
# not redownload it.
# Check to see whether or not we should keep the drpms
# FIXME: Is there any way to see whether or not a Boolean option was not set?
if conduit.confBool('main', 'neverkeepdeltas'):
delete = True
elif conduit.confBool('main', 'keepdeltas'):
delete = False
elif conduit.getConf().keepcache != 0:
delete = False
else:
delete = True
if delete:
try:
os.unlink(deltalocal)
except:
pass
return errors
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