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#!/usr/bin/python
#
# 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
#
import rpm
import miscutils
read_ts = None
ts = None
# wrapper/proxy class for rpm.Transaction so we can
# instrument it, etc easily
class TransactionWrapper:
def __init__(self, root='/'):
self.ts = rpm.TransactionSet(root)
self._methods = ['check',
'order',
'addErase',
'addInstall',
'run',
'pgpImportPubkey',
'pgpPrtPkts',
'problems',
'setFlags',
'setVSFlags',
'setProbFilter',
'hdrFromFdno',
'next',
'clean',
'_verifySigs']
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 __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 dont lose the previous
# set value, and we can potentiall debug a bit
# easier
def pushVSFlags(self, flags):
self.tsflags.append(flags)
self.ts.setVSFlags(self.tsflags[-1])
def popVSFlags(self):
del self.tsflags[-1]
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 addProblemFilter(self, filt):
# curfilter = self.ts.setProbFilter(0)
# self.ts.setProbFilter(cutfilter | filt)
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 elsehwere
# KEEPING FOR API COMPLIANCE ONLY
if conf.get('diskspacecheck') == 0:
self.ts.setProbFilter(rpm.RPMPROB_FILTER_DISKSPACE|
rpm.RPMPROB_FILTER_DISKNODES)
tserrors = self.ts.run(cb.callback, '')
self.ts.setFlags(origflags)
if tserrors is None:
return []
if not tserrors:
return ['Unknown error during transaction test in RPM']
reserrors = []
for (descr, (etype, mount, need)) in tserrors:
reserrors.append(descr)
return reserrors
def returnLeafNodes(self, headers=False):
"""returns a list of package tuples (n,a,e,v,r) that are not required by
any other package on the system
If headers is True then it will return a list of (header, index) tuples
"""
req = {}
orphan = []
mi = self.dbMatch()
if mi is None: # this is REALLY unlikely but let's just say it for the moment
return orphan
# prebuild the req dict
for h in mi:
if h['name'] == 'gpg-pubkey':
continue
if not h[rpm.RPMTAG_REQUIRENAME]:
continue
tup = miscutils.pkgTupleFromHeader(h)
for r in h[rpm.RPMTAG_REQUIRENAME]:
if r not in req:
req[r] = set()
req[r].add(tup)
mi = self.dbMatch()
if mi is None:
return orphan
def _return_all_provides(hdr):
""" Return all the provides, via yield. """
# These are done one by one, so that we get lazy loading
for prov in hdr[rpm.RPMTAG_PROVIDES]:
yield prov
for prov in hdr[rpm.RPMTAG_FILENAMES]:
yield prov
for h in mi:
if h['name'] == 'gpg-pubkey':
continue
preq = 0
tup = miscutils.pkgTupleFromHeader(h)
for p in _return_all_provides(h):
if p in req:
# Don't count a package that provides its require
s = req[p]
if len(s) > 1 or tup not in s:
preq = preq + 1
break
if preq == 0:
if headers:
orphan.append((h, mi.instance()))
else:
orphan.append(tup)
return orphan
def initReadOnlyTransaction(root='/'):
read_ts = TransactionWrapper(root=root)
read_ts.pushVSFlags((rpm._RPMVSF_NOSIGNATURES|rpm._RPMVSF_NODIGESTS))
return read_ts