607 lines
24 KiB
Python
607 lines
24 KiB
Python
# Copyright (C) 2003-2016 John Goerzen & contributors
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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from subprocess import Popen, PIPE
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from threading import Event
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import os
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import time
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from sys import exc_info
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import traceback
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import six
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from offlineimap import mbnames, CustomConfig, OfflineImapError
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from offlineimap import globals
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from offlineimap.repository import Repository
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from offlineimap.ui import getglobalui
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from offlineimap.threadutil import InstanceLimitedThread
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FOLDER_NAMESPACE = 'LIMITED_FOLDER_'
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try:
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import fcntl
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except:
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pass # ok if this fails, we can do without
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# FIXME: spaghetti code alert!
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def getaccountlist(customconfig):
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# Account names in a list.
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return customconfig.getsectionlist('Account')
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# FIXME: spaghetti code alert!
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def AccountListGenerator(customconfig):
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"""Returns a list of instanciated Account class, one per account name."""
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return [Account(customconfig, accountname)
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for accountname in getaccountlist(customconfig)]
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# FIXME: spaghetti code alert!
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def AccountHashGenerator(customconfig):
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"""Returns a dict of instanciated Account class with the account name as
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key."""
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retval = {}
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for item in AccountListGenerator(customconfig):
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retval[item.getname()] = item
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return retval
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class Account(CustomConfig.ConfigHelperMixin):
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"""Represents an account (ie. 2 repositories) to sync.
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Most of the time you will actually want to use the derived
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:class:`accounts.SyncableAccount` which contains all functions used
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for syncing an account."""
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# Signal gets set when we should stop looping.
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abort_soon_signal = Event()
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# Signal gets set on CTRL-C/SIGTERM.
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abort_NOW_signal = Event()
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def __init__(self, config, name):
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"""
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:param config: Representing the offlineimap configuration file.
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:type config: :class:`offlineimap.CustomConfig.CustomConfigParser`
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:param name: A (str) string denoting the name of the Account
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as configured.
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"""
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self.config = config
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self.name = name
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self.metadatadir = config.getmetadatadir()
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self.localeval = config.getlocaleval()
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# current :mod:`offlineimap.ui`, can be used for logging:
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self.ui = getglobalui()
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self.refreshperiod = self.getconffloat('autorefresh', 0.0)
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# should we run in "dry-run" mode?
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self.dryrun = self.config.getboolean('general', 'dry-run')
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self.quicknum = 0
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if self.refreshperiod == 0.0:
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self.refreshperiod = None
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def getlocaleval(self):
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return self.localeval
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# Interface from CustomConfig.ConfigHelperMixin
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def getconfig(self):
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return self.config
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def getname(self):
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return self.name
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def __str__(self):
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return self.name
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def getaccountmeta(self):
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return os.path.join(self.metadatadir, 'Account-' + self.name)
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# Interface from CustomConfig.ConfigHelperMixin
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def getsection(self):
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return 'Account ' + self.getname()
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@classmethod
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def set_abort_event(cls, config, signum):
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"""Set skip sleep/abort event for all accounts.
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If we want to skip a current (or the next) sleep, or if we want
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to abort an autorefresh loop, the main thread can use
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set_abort_event() to send the corresponding signal. Signum = 1
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implies that we want all accounts to abort or skip the current
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or next sleep phase. Signum = 2 will end the autorefresh loop,
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ie all accounts will return after they finished a sync. signum=3
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means, abort NOW, e.g. on SIGINT or SIGTERM.
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This is a class method, it will send the signal to all accounts.
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"""
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if signum == 1:
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# resync signal, set config option for all accounts
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for acctsection in getaccountlist(config):
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config.set('Account ' + acctsection, "skipsleep", '1')
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elif signum == 2:
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# don't autorefresh anymore
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cls.abort_soon_signal.set()
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elif signum == 3:
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# abort ASAP
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cls.abort_NOW_signal.set()
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def get_abort_event(self):
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"""Checks if an abort signal had been sent.
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If the 'skipsleep' config option for this account had been set,
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with `set_abort_event(config, 1)` it will get cleared in this
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function. Ie, we will only skip one sleep and not all.
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:returns: True, if the main thread had called
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:meth:`set_abort_event` earlier, otherwise 'False'.
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"""
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skipsleep = self.getconfboolean("skipsleep", 0)
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if skipsleep:
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self.config.set(self.getsection(), "skipsleep", '0')
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return skipsleep or Account.abort_soon_signal.is_set() or \
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Account.abort_NOW_signal.is_set()
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def _sleeper(self):
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"""Sleep if the account is set to autorefresh.
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:returns: 0:timeout expired, 1: canceled the timer,
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2:request to abort the program,
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100: if configured to not sleep at all.
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"""
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if not self.refreshperiod:
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return 100
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kaobjs = []
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if hasattr(self, 'localrepos'):
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kaobjs.append(self.localrepos)
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if hasattr(self, 'remoterepos'):
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kaobjs.append(self.remoterepos)
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for item in kaobjs:
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item.startkeepalive()
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refreshperiod = int(self.refreshperiod * 60)
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sleepresult = self.ui.sleep(refreshperiod, self)
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# Cancel keepalive
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for item in kaobjs:
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item.stopkeepalive()
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if sleepresult:
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if Account.abort_soon_signal.is_set() or \
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Account.abort_NOW_signal.is_set():
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return 2
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self.quicknum = 0
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return 1
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return 0
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def serverdiagnostics(self):
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"""Output diagnostics for all involved repositories."""
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remote_repo = Repository(self, 'remote')
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local_repo = Repository(self, 'local')
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#status_repo = Repository(self, 'status')
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self.ui.serverdiagnostics(remote_repo, 'Remote')
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self.ui.serverdiagnostics(local_repo, 'Local')
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#self.ui.serverdiagnostics(statusrepos, 'Status')
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class SyncableAccount(Account):
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"""A syncable email account connecting 2 repositories.
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Derives from :class:`accounts.Account` but contains the additional
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functions :meth:`syncrunner`, :meth:`sync`, :meth:`syncfolders`,
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used for syncing.
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In multi-threaded mode, one instance of this object is run per "account"
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thread."""
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def __init__(self, *args, **kwargs):
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Account.__init__(self, *args, **kwargs)
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self._lockfd = None
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self._lockfilepath = os.path.join(
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self.config.getmetadatadir(), "%s.lock"% self)
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def __lock(self):
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"""Lock the account, throwing an exception if it is locked already."""
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self._lockfd = open(self._lockfilepath, 'w')
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try:
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fcntl.lockf(self._lockfd, fcntl.LOCK_EX|fcntl.LOCK_NB)
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except NameError:
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#fcntl not available (Windows), disable file locking... :(
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pass
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except IOError:
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self._lockfd.close()
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six.reraise(OfflineImapError("Could not lock account %s. Is another "
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"instance using this account?"% self,
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OfflineImapError.ERROR.REPO), None, exc_info()[2])
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def _unlock(self):
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"""Unlock the account, deleting the lock file"""
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#If we own the lock file, delete it
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if self._lockfd and not self._lockfd.closed:
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self._lockfd.close()
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try:
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os.unlink(self._lockfilepath)
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except OSError:
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pass # Failed to delete for some reason.
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def syncrunner(self):
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"""The target for both single and multi-threaded modes."""
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self.ui.registerthread(self)
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try:
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accountmetadata = self.getaccountmeta()
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if not os.path.exists(accountmetadata):
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os.mkdir(accountmetadata, 0o700)
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self.remoterepos = Repository(self, 'remote')
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self.localrepos = Repository(self, 'local')
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self.statusrepos = Repository(self, 'status')
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except OfflineImapError as e:
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self.ui.error(e, exc_info()[2])
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if e.severity >= OfflineImapError.ERROR.CRITICAL:
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raise
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return
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# Loop account sync if needed (bail out after 3 failures)
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looping = 3
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while looping:
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self.ui.acct(self)
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try:
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self.__lock()
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self.__sync()
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except (KeyboardInterrupt, SystemExit):
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raise
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except OfflineImapError as e:
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# Stop looping and bubble up Exception if needed.
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if e.severity >= OfflineImapError.ERROR.REPO:
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if looping:
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looping -= 1
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if e.severity >= OfflineImapError.ERROR.CRITICAL:
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raise
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self.ui.error(e, exc_info()[2])
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except Exception as e:
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self.ui.error(e, exc_info()[2], msg=
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"While attempting to sync account '%s'"% self)
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else:
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# after success sync, reset the looping counter to 3
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if self.refreshperiod:
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looping = 3
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finally:
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self.ui.acctdone(self)
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self._unlock()
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if looping and self._sleeper() >= 2:
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looping = 0
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def get_local_folder(self, remotefolder):
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"""Return the corresponding local folder for a given remotefolder."""
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return self.localrepos.getfolder(
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remotefolder.getvisiblename().
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replace(self.remoterepos.getsep(), self.localrepos.getsep()))
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def __sync(self):
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"""Synchronize the account once, then return.
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Assumes that `self.remoterepos`, `self.localrepos`, and
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`self.statusrepos` has already been populated, so it should only
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be called from the :meth:`syncrunner` function."""
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folderthreads = []
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hook = self.getconf('presynchook', '')
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self.callhook(hook)
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quickconfig = self.getconfint('quick', 0)
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if quickconfig < 0:
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quick = True
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elif quickconfig > 0:
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if self.quicknum == 0 or self.quicknum > quickconfig:
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self.quicknum = 1
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quick = False
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else:
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self.quicknum = self.quicknum + 1
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quick = True
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else:
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quick = False
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try:
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remoterepos = self.remoterepos
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localrepos = self.localrepos
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statusrepos = self.statusrepos
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# init repos with list of folders, so we have them (and the
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# folder delimiter etc)
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remoterepos.getfolders()
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localrepos.getfolders()
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remoterepos.sync_folder_structure(localrepos, statusrepos)
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# replicate the folderstructure between REMOTE to LOCAL
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if not localrepos.getconfboolean('readonly', False):
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self.ui.syncfolders(remoterepos, localrepos)
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# iterate through all folders on the remote repo and sync
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for remotefolder in remoterepos.getfolders():
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# check for CTRL-C or SIGTERM
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if Account.abort_NOW_signal.is_set(): break
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if not remotefolder.sync_this:
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self.ui.debug('', "Not syncing filtered folder '%s'"
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"[%s]"% (remotefolder, remoterepos))
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continue # Ignore filtered folder
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localfolder = self.get_local_folder(remotefolder)
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if not localfolder.sync_this:
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self.ui.debug('', "Not syncing filtered folder '%s'"
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"[%s]"% (localfolder, localfolder.repository))
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continue # Ignore filtered folder
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if not globals.options.singlethreading:
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thread = InstanceLimitedThread(
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limitNamespace = "%s%s"% (
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FOLDER_NAMESPACE, self.remoterepos.getname()),
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target = syncfolder,
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name = "Folder %s [acc: %s]"% (
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remotefolder.getexplainedname(), self),
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args = (self, remotefolder, quick)
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)
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thread.start()
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folderthreads.append(thread)
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else:
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syncfolder(self, remotefolder, quick)
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# wait for all threads to finish
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for thr in folderthreads:
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thr.join()
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mbnames.writeIntermediateFile(self.name) # Write out mailbox names.
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localrepos.forgetfolders()
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remoterepos.forgetfolders()
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except:
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#error while syncing. Drop all connections that we have, they
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#might be bogus by now (e.g. after suspend)
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localrepos.dropconnections()
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remoterepos.dropconnections()
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raise
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else:
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# sync went fine. Hold or drop depending on config
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localrepos.holdordropconnections()
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remoterepos.holdordropconnections()
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hook = self.getconf('postsynchook', '')
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self.callhook(hook)
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def callhook(self, cmd):
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# check for CTRL-C or SIGTERM and run postsynchook
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if Account.abort_NOW_signal.is_set():
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return
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if not cmd:
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return
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try:
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self.ui.callhook("Calling hook: " + cmd)
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if self.dryrun: # don't if we are in dry-run mode
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return
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p = Popen(cmd, shell=True,
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stdin=PIPE, stdout=PIPE, stderr=PIPE,
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close_fds=True)
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r = p.communicate()
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self.ui.callhook("Hook stdout: %s\nHook stderr:%s\n"% r)
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self.ui.callhook("Hook return code: %d"% p.returncode)
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except (KeyboardInterrupt, SystemExit):
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raise
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except Exception as e:
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self.ui.error(e, exc_info()[2], msg="Calling hook")
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def syncfolder(account, remotefolder, quick):
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"""Synchronizes given remote folder for the specified account.
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Filtered folders on the remote side will not invoke this function."""
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def check_uid_validity(localfolder, remotefolder, statusfolder):
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# If either the local or the status folder has messages and
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# there is a UID validity problem, warn and abort. If there are
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# no messages, UW IMAPd loses UIDVALIDITY. But we don't really
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# need it if both local folders are empty. So, in that case,
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# just save it off.
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if localfolder.getmessagecount() > 0 or statusfolder.getmessagecount() > 0:
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if not localfolder.check_uidvalidity():
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ui.validityproblem(localfolder)
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localfolder.repository.restore_atime()
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return
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if not remotefolder.check_uidvalidity():
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ui.validityproblem(remotefolder)
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localrepos.restore_atime()
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return
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else:
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# Both folders empty, just save new UIDVALIDITY
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localfolder.save_uidvalidity()
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remotefolder.save_uidvalidity()
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def save_min_uid(folder, min_uid):
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uidfile = folder.get_min_uid_file()
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fd = open(uidfile, 'wt')
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fd.write(str(min_uid) + "\n")
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fd.close()
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def cachemessagelists_upto_date(localfolder, remotefolder, date):
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""" Returns messages with uid > min(uids of messages newer than date)."""
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localfolder.cachemessagelist(min_date=date)
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check_uid_validity(localfolder, remotefolder, statusfolder)
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# local messagelist had date restriction applied already. Restrict
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# sync to messages with UIDs >= min_uid from this list.
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#
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# local messagelist might contain new messages (with uid's < 0).
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positive_uids = [uid for uid in localfolder.getmessageuidlist() if uid > 0]
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if len(positive_uids) > 0:
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remotefolder.cachemessagelist(min_uid=min(positive_uids))
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else:
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# No messages with UID > 0 in range in localfolder.
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# date restriction was applied with respect to local dates but
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# remote folder timezone might be different from local, so be
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# safe and make sure the range isn't bigger than in local.
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remotefolder.cachemessagelist(
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min_date=time.gmtime(time.mktime(date) + 24*60*60))
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def cachemessagelists_startdate(new, partial, date):
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""" Retrieve messagelists when startdate has been set for
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the folder 'partial'.
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Idea: suppose you want to clone the messages after date in one
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account (partial) to a new one (new). If new is empty, then copy
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messages in partial newer than date to new, and keep track of the
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min uid. On subsequent syncs, sync all the messages in new against
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those after that min uid in partial. This is a partial replacement
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for maxage in the IMAP-IMAP sync case, where maxage doesn't work:
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the UIDs of the messages in localfolder might not be in the same
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order as those of corresponding messages in remotefolder, so if L in
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local corresponds to R in remote, the ranges [L, ...] and [R, ...]
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might not correspond. But, if we're cloning a folder into a new one,
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[min_uid, ...] does correspond to [1, ...].
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This is just for IMAP-IMAP. For Maildir-IMAP, use maxage instead.
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"""
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new.cachemessagelist()
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min_uid = partial.retrieve_min_uid()
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if min_uid == None: # min_uid file didn't exist
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if len(new.getmessageuidlist()) > 0:
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raise OfflineImapError("To use startdate on Repository %s, "
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"Repository %s must be empty"%
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(partial.repository.name, new.repository.name),
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OfflineImapError.ERROR.MESSAGE)
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else:
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partial.cachemessagelist(min_date=date)
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# messagelist.keys() instead of getuidmessagelist() because in
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# the UID mapped case we want the actual local UIDs, not their
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# remote counterparts
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positive_uids = [uid for uid in list(partial.messagelist.keys()) if uid > 0]
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if len(positive_uids) > 0:
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min_uid = min(positive_uids)
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else:
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min_uid = 1
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save_min_uid(partial, min_uid)
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else:
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partial.cachemessagelist(min_uid=min_uid)
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remoterepos = account.remoterepos
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localrepos = account.localrepos
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statusrepos = account.statusrepos
|
|
|
|
ui = getglobalui()
|
|
ui.registerthread(account)
|
|
try:
|
|
# Load local folder.
|
|
localfolder = account.get_local_folder(remotefolder)
|
|
|
|
# Add the folder to the mbnames mailboxes.
|
|
mbnames.add(account.name, localrepos.getlocalroot(),
|
|
localfolder.getname())
|
|
|
|
# Load status folder.
|
|
statusfolder = statusrepos.getfolder(remotefolder.getvisiblename().
|
|
replace(remoterepos.getsep(), statusrepos.getsep()))
|
|
statusfolder.openfiles()
|
|
|
|
if localfolder.get_uidvalidity() == None:
|
|
# This is a new folder, so delete the status cache to be
|
|
# sure we don't have a conflict.
|
|
# TODO: This does not work. We always return a value, need
|
|
# to rework this...
|
|
statusfolder.deletemessagelist()
|
|
|
|
statusfolder.cachemessagelist()
|
|
|
|
|
|
# Load local folder.
|
|
ui.syncingfolder(remoterepos, remotefolder, localrepos, localfolder)
|
|
|
|
# Retrieve messagelists, taking into account age-restriction
|
|
# options
|
|
maxage = localfolder.getmaxage()
|
|
localstart = localfolder.getstartdate()
|
|
remotestart = remotefolder.getstartdate()
|
|
if (maxage != None) + (localstart != None) + (remotestart != None) > 1:
|
|
six.reraise(OfflineImapError("You can set at most one of the "
|
|
"following: maxage, startdate (for the local folder), "
|
|
"startdate (for the remote folder)",
|
|
OfflineImapError.ERROR.REPO), None, exc_info()[2])
|
|
if (maxage != None or localstart or remotestart) and quick:
|
|
# IMAP quickchanged isn't compatible with options that
|
|
# involve restricting the messagelist, since the "quick"
|
|
# check can only retrieve a full list of UIDs in the folder.
|
|
ui.warn("Quick syncs (-q) not supported in conjunction "
|
|
"with maxage or startdate; ignoring -q.")
|
|
if maxage != None:
|
|
cachemessagelists_upto_date(localfolder, remotefolder, maxage)
|
|
elif localstart != None:
|
|
cachemessagelists_startdate(remotefolder, localfolder,
|
|
localstart)
|
|
check_uid_validity(localfolder, remotefolder, statusfolder)
|
|
elif remotestart != None:
|
|
cachemessagelists_startdate(localfolder, remotefolder,
|
|
remotestart)
|
|
check_uid_validity(localfolder, remotefolder, statusfolder)
|
|
else:
|
|
localfolder.cachemessagelist()
|
|
if quick:
|
|
if (not localfolder.quickchanged(statusfolder) and
|
|
not remotefolder.quickchanged(statusfolder)):
|
|
ui.skippingfolder(remotefolder)
|
|
localrepos.restore_atime()
|
|
return
|
|
check_uid_validity(localfolder, remotefolder, statusfolder)
|
|
remotefolder.cachemessagelist()
|
|
|
|
# Synchronize remote changes.
|
|
if not localrepos.getconfboolean('readonly', False):
|
|
ui.syncingmessages(remoterepos, remotefolder, localrepos, localfolder)
|
|
remotefolder.syncmessagesto(localfolder, statusfolder)
|
|
else:
|
|
ui.debug('', "Not syncing to read-only repository '%s'"%
|
|
localrepos.getname())
|
|
|
|
# Synchronize local changes.
|
|
if not remoterepos.getconfboolean('readonly', False):
|
|
ui.syncingmessages(localrepos, localfolder, remoterepos, remotefolder)
|
|
localfolder.syncmessagesto(remotefolder, statusfolder)
|
|
else:
|
|
ui.debug('', "Not syncing to read-only repository '%s'"%
|
|
remoterepos.getname())
|
|
|
|
statusfolder.save()
|
|
localrepos.restore_atime()
|
|
except (KeyboardInterrupt, SystemExit):
|
|
raise
|
|
except OfflineImapError as e:
|
|
# bubble up severe Errors, skip folder otherwise
|
|
if e.severity > OfflineImapError.ERROR.FOLDER:
|
|
raise
|
|
else:
|
|
ui.error(e, exc_info()[2], msg = "Aborting sync, folder '%s' "
|
|
"[acc: '%s']" % (localfolder, account))
|
|
except Exception as e:
|
|
ui.error(e, msg = "ERROR in syncfolder for %s folder %s: %s"%
|
|
(account, remotefolder.getvisiblename(), traceback.format_exc()))
|
|
finally:
|
|
for folder in ["statusfolder", "localfolder", "remotefolder"]:
|
|
if folder in locals():
|
|
locals()[folder].dropmessagelistcache()
|
|
statusfolder.closefiles()
|