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# Copyright (C) 2009-2016 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""Getting information out of a qfile."""
import pickle
from mailman import public
from mailman.core.i18n import _
from mailman.interfaces.command import ICLISubCommand
from mailman.utilities.interact import interact
from pprint import PrettyPrinter
from zope.interface import implementer
# This is deliberately called 'm' for use with --interactive.
m = []
@public
@implementer(ICLISubCommand)
class QFile:
"""Get information out of a queue file."""
name = 'qfile'
def add(self, parser, command_parser):
"""See `ICLISubCommand`."""
self.parser = parser
command_parser.add_argument(
'-n', '--noprint',
dest='doprint', default=True, action='store_false',
help=_("""\
Don't attempt to pretty print the object. This is useful if there
is some problem with the object and you just want to get an
unpickled representation. Useful with 'bin/dumpdb -i <file>'. In
that case, the list of unpickled objects will be left in a
variable called 'm'."""))
command_parser.add_argument(
'-i', '--interactive',
default=False, action='store_true',
help=_("""\
Start an interactive Python session, with a variable called 'm'
containing the list of unpickled objects."""))
command_parser.add_argument(
'qfile', metavar='FILENAME', nargs=1,
help=_('The queue file to dump.'))
def process(self, args):
"""See `ICLISubCommand`."""
printer = PrettyPrinter(indent=4)
assert len(args.qfile) == 1, 'Wrong number of positional arguments'
with open(args.qfile[0], 'rb') as fp:
while True:
try:
m.append(pickle.load(fp))
except EOFError:
break
if args.doprint:
print(_('[----- start pickle -----]'))
for i, obj in enumerate(m):
count = i + 1
print(_('<----- start object $count ----->'))
if isinstance(obj, (bytes, str)):
print(obj)
else:
printer.pprint(obj)
print(_('[----- end pickle -----]'))
count = len(m) # noqa: F841
banner = _("The variable 'm' contains $count objects")
if args.interactive:
interact(banner=banner)
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