[ PARENT ]

EDIT :: transaction.py

# # 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 rpm 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 __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 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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