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#
# Client code for Update Agent
# Copyright (c) 1999-2002 Red Hat, Inc. Distributed under GPL.
#
# Adrian Likins <alikins@redhat.com>
# Some Edits by Seth Vidal <skvidal@phy.duke.edu>
#
# a couple of classes wrapping up transactions so that we
# can share transactions instead of creating new ones all over
#
from __future__ import absolute_import
from __future__ import unicode_literals
from dnf.i18n import _
import logging
import rpm
_logger = logging.getLogger('dnf')
read_ts = None
ts = None
# wrapper/proxy class for rpm.Transaction so we can
# instrument it, etc easily
class TransactionWrapper(object):
def __init__(self, root='/'):
self.ts = rpm.TransactionSet(root)
self._methods = ['check',
'order',
'addErase',
'addInstall',
'addReinstall',
'run',
'pgpImportPubkey',
'pgpPrtPkts',
'problems',
'setFlags',
'setVSFlags',
'setProbFilter',
'hdrFromFdno',
'next',
'clean']
self.tsflags = []
self.open = True
def __del__(self):
# Automatically close the rpm transaction when the reference is lost
self.close()
def close(self):
if self.open:
self.ts.closeDB()
self.ts = None
self.open = False
def dbMatch(self, *args, **kwds):
if 'patterns' in kwds:
patterns = kwds.pop('patterns')
else:
patterns = []
mi = self.ts.dbMatch(*args, **kwds)
for (tag, tp, pat) in patterns:
mi.pattern(tag, tp, pat)
return mi
def dbCookie(self):
# dbCookie() does not support lazy opening of rpm database.
# The following line opens the database if it is not already open.
if self.ts.openDB() != 0:
_logger.error(_('The openDB() function cannot open rpm database.'))
return ''
cookie = self.ts.dbCookie()
if not cookie:
_logger.error(_('The dbCookie() function did not return cookie of rpm database.'))
return ''
return cookie
def __getattr__(self, attr):
if attr in self._methods:
return self.getMethod(attr)
else:
raise AttributeError(attr)
def __iter__(self):
return self.ts
def getMethod(self, method):
# in theory, we can override this with
# profile/etc info
return getattr(self.ts, method)
# push/pop methods so we don't lose the previous
# set value, and we can potentially debug a bit
# easier
def pushVSFlags(self, flags):
self.tsflags.append(flags)
self.ts.setVSFlags(self.tsflags[-1])
def addTsFlag(self, flag):
curflags = self.ts.setFlags(0)
self.ts.setFlags(curflags | flag)
def getTsFlags(self):
curflags = self.ts.setFlags(0)
self.ts.setFlags(curflags)
return curflags
def isTsFlagSet(self, flag):
val = self.getTsFlags()
return bool(flag & val)
def setScriptFd(self, fd):
self.ts.scriptFd = fd.fileno()
def test(self, cb, conf={}):
"""tests the ts we've setup, takes a callback function and a conf dict
for flags and what not"""
origflags = self.getTsFlags()
self.addTsFlag(rpm.RPMTRANS_FLAG_TEST)
# FIXME GARBAGE - remove once this is reimplemented elsewhere
# KEEPING FOR API COMPLIANCE ONLY
if conf.get('diskspacecheck') == 0:
self.ts.setProbFilter(rpm.RPMPROB_FILTER_DISKSPACE)
tserrors = self.ts.run(cb.callback, '')
self.ts.setFlags(origflags)
reserrors = []
if tserrors is not None:
for (descr, (etype, mount, need)) in tserrors:
reserrors.append(descr)
if not reserrors:
reserrors.append(_('Errors occurred during test transaction.'))
return reserrors
def initReadOnlyTransaction(root='/'):
read_ts = TransactionWrapper(root=root)
read_ts.pushVSFlags((rpm._RPMVSF_NOSIGNATURES|rpm._RPMVSF_NODIGESTS))
return read_ts
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