Current File : //lib/python3.6/site-packages/up2date_client/transaction.py
#
# Client code for Update Agent
# Copyright (c) 1999--2016 Red Hat, Inc. Distributed under GPLv2.
#
# Adrian Likins <alikins@redhat.com
#
#
# a couple of classes wrapping up transactions so that we
# can share transactions instead of creating new ones all over
#
import rpm
read_ts = None
ts = None
# ************* NOTE: ************#
# for the sake of clarity, the names "added/removed" as used here
# are indicative of what happened when the original transaction was
# ran. Aka, if you "up2date foobar" and it updates foobar-1-0 with
# foobar-2-0, you added foobar-2-0 and removed foobar-1-0
#
# The reason I mention this explicitly is the trouble of describing
# what happens when you rollback the transaction, which is basically
# the opposite, and leads to plenty of confusion
#
class TransactionData:
# simple data structure designed to transport info
# about rpm transactions around
def __init__(self):
self.data = {}
# a list of tuples of pkg info, and mode ('e', 'i', 'u')
# the pkgInfo is tuple of [name, version, release, epoch, arch]
# size is never used directly for this, it's here as a place holder
# arch is optional, if the server specifies it, go with what
# removed packages only need [n,v,r,e,arch]
self.data['packages'] = []
# list of flags to set for the transaction
self.data['flags'] = []
self.data['vsflags'] = []
self.data['probFilterFlags'] = []
def display(self):
out = ""
removed = []
installed = []
updated = []
misc = []
for (pkgInfo, mode) in self.data['packages']:
if mode == 'u':
updated.append(pkgInfo)
elif mode == 'i':
installed.append(pkgInfo)
elif mode == 'e':
removed.append(pkgInfo)
else:
misc.append(pkgInfo)
for pkgInfo in removed:
out = out + "\t\t[e] %s-%s-%s:%s\n" % (pkgInfo[0], pkgInfo[1], pkgInfo[2], pkgInfo[3])
for pkgInfo in installed:
out = out + "\t\t[i] %s-%s-%s:%s\n" % (pkgInfo[0], pkgInfo[1], pkgInfo[2], pkgInfo[3])
for pkgInfo in updated:
out = out + "\t\t[u] %s-%s-%s:%s\n" % (pkgInfo[0], pkgInfo[1], pkgInfo[2], pkgInfo[3])
for pkgInfo in misc:
out = out + "\t\t[%s] %s-%s-%s:%s\n" % (pkgInfo[5], pkgInfo[0], pkgInfo[1],
pkgInfo[2], pkgInfo[3])
return out
# wrapper/proxy class for rpm.Transaction so we can
# instrument it, etc easily
class Up2dateTransaction:
def __init__(self):
self.ts = rpm.TransactionSet()
self._methods = ['dbMatch',
'check',
'order',
'addErase',
'addInstall',
'run',
'IDTXload',
'IDTXglob',
'rollback',
'pgpImportPubkey',
'pgpPrtPkts',
'Debug',
'setFlags',
'setVSFlags',
'setProbFilter',
'hdrFromFdno']
self.tsflags = []
def __getattr__(self, attr):
if attr in self._methods:
return self.getMethod(attr)
else:
raise AttributeError(attr)
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 initReadOnlyTransaction():
global read_ts
if read_ts == None:
read_ts = Up2dateTransaction()
# FIXME: replace with macro defination
read_ts.pushVSFlags(-1)
return read_ts
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