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# drpm.py
# Delta RPM support
#
# Copyright (C) 2012-2016 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties 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, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
from __future__ import absolute_import
from __future__ import unicode_literals
from binascii import hexlify
from dnf.yum.misc import unlink_f
from dnf.i18n import _
import dnf.callback
import dnf.logging
import dnf.repo
import hawkey
import logging
import libdnf.repo
import os
APPLYDELTA = '/usr/bin/applydeltarpm'
logger = logging.getLogger("dnf")
class DeltaPayload(dnf.repo.PackagePayload):
def __init__(self, delta_info, delta, pkg, progress):
super(DeltaPayload, self).__init__(pkg, progress)
self.delta_info = delta_info
self.delta = delta
def __str__(self):
return os.path.basename(self.delta.location)
def _end_cb(self, cbdata, lr_status, msg):
super(DeltaPayload, self)._end_cb(cbdata, lr_status, msg)
if lr_status != libdnf.repo.PackageTargetCB.TransferStatus_ERROR:
self.delta_info.enqueue(self)
def _target_params(self):
delta = self.delta
ctype, csum = delta.chksum
ctype = hawkey.chksum_name(ctype)
chksum = hexlify(csum).decode()
ctype_code = libdnf.repo.PackageTarget.checksumType(ctype)
if ctype_code == libdnf.repo.PackageTarget.ChecksumType_UNKNOWN:
logger.warning(_("unsupported checksum type: %s"), ctype)
return {
'relative_url' : delta.location,
'checksum_type' : ctype_code,
'checksum' : chksum,
'expectedsize' : delta.downloadsize,
'base_url' : delta.baseurl,
}
@property
def download_size(self):
return self.delta.downloadsize
@property
def _full_size(self):
return self.pkg.downloadsize
def localPkg(self):
location = self.delta.location
return os.path.join(self.pkg.repo.pkgdir, os.path.basename(location))
class DeltaInfo(object):
def __init__(self, query, progress, deltarpm_percentage=None):
'''A delta lookup and rebuild context
query -- installed packages to use when looking up deltas
progress -- progress obj to display finished delta rebuilds
'''
self.deltarpm_installed = False
if os.access(APPLYDELTA, os.X_OK):
self.deltarpm_installed = True
try:
self.deltarpm_jobs = os.sysconf('SC_NPROCESSORS_ONLN')
except (TypeError, ValueError):
self.deltarpm_jobs = 4
if deltarpm_percentage is None:
self.deltarpm_percentage = dnf.conf.Conf().deltarpm_percentage
else:
self.deltarpm_percentage = deltarpm_percentage
self.query = query
self.progress = progress
self.queue = []
self.jobs = {}
self.err = {}
def delta_factory(self, po, progress):
'''Turn a po to Delta RPM po, if possible'''
if not self.deltarpm_installed:
# deltarpm is not installed
return None
if not po.repo.deltarpm or not self.deltarpm_percentage:
# drpm disabled
return None
if po._is_local_pkg():
# drpm disabled for local
return None
if os.path.exists(po.localPkg()):
# already there
return None
best = po._size * self.deltarpm_percentage / 100
best_delta = None
for ipo in self.query.filter(name=po.name, arch=po.arch):
delta = po.get_delta_from_evr(ipo.evr)
if delta and delta.downloadsize < best:
best = delta.downloadsize
best_delta = delta
if best_delta:
return DeltaPayload(self, best_delta, po, progress)
return None
def job_done(self, pid, code):
# handle a finished delta rebuild
logger.log(dnf.logging.SUBDEBUG, 'drpm: %d: return code: %d, %d', pid,
code >> 8, code & 0xff)
pload = self.jobs.pop(pid)
pkg = pload.pkg
if code != 0:
unlink_f(pload.pkg.localPkg())
self.err[pkg] = [_('Delta RPM rebuild failed')]
elif not pload.pkg.verifyLocalPkg():
self.err[pkg] = [_('Checksum of the delta-rebuilt RPM failed')]
else:
os.unlink(pload.localPkg())
self.progress.end(pload, dnf.callback.STATUS_DRPM, _('done'))
def start_job(self, pload):
# spawn a delta rebuild job
spawn_args = [APPLYDELTA, APPLYDELTA,
'-a', pload.pkg.arch,
pload.localPkg(), pload.pkg.localPkg()]
pid = os.spawnl(os.P_NOWAIT, *spawn_args)
logger.log(dnf.logging.SUBDEBUG, 'drpm: spawned %d: %s', pid,
' '.join(spawn_args[1:]))
self.jobs[pid] = pload
def enqueue(self, pload):
# process finished jobs, start new ones
while self.jobs:
pid, code = os.waitpid(-1, os.WNOHANG)
if not pid:
break
self.job_done(pid, code)
self.queue.append(pload)
while len(self.jobs) < self.deltarpm_jobs:
self.start_job(self.queue.pop(0))
if not self.queue:
break
def wait(self):
'''Wait until all jobs have finished'''
while self.jobs:
pid, code = os.wait()
self.job_done(pid, code)
if self.queue:
self.start_job(self.queue.pop(0))