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# IVLE - Informatics Virtual Learning Environment
# Copyright (C) 2008 The University of Melbourne
#
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# Module: Subversion utilities
# Author: William Grant
# Date: 16/07/2008
import stat
import pysvn
def create_auth_svn_client_autopass(username, save_credentials=False):
"""Create a new pysvn client which is set up to automatically authenticate
with the supplied user. The user's Subversion password is automatically
looked up in the database.
(Requires database access -- can't be used inside the jail.)
@param username: IVLE/Subversion username.
@param save_credentials: Save the user's credentials. Should be False when
outside the jail.
"""
# Note: Must do this inside the function, since this file may be used in
# the jail, and importing ivle.database crashes in the jail.
from ivle.config import Config
import ivle.database
from ivle.database import User
store = ivle.database.get_store(Config())
user = store.find(User, User.login==unicode(username)).one()
return create_auth_svn_client(username, user.svn_pass, save_credentials)
def create_auth_svn_client(username, password, save_credentials=True):
"""Create a new pysvn client which is set up to automatically authenticate
with the supplied credentials.
@param username: IVLE/Subversion username.
@param password: Subversion password.
@param save_credentials: Save the user's credentials. Should be False when
outside the jail.
"""
username = str(username)
password = str(password)
def get_login(_realm, existing_login, _may_save):
"""Callback function used by pysvn for authentication.
realm, existing_login, _may_save: The 3 arguments passed by pysvn to
callback_get_login.
The following has been determined empirically, not from docs:
existing_login will be the name of the user who owns the process on
the first attempt, "" on subsequent attempts. We use this fact.
"""
# Only provide credentials on the _first_ attempt.
# If we're being asked again, then it means the credentials failed for
# some reason and we should just fail. (This is not desirable, but it's
# better than being asked an infinite number of times).
return (existing_login != "", username, password, save_credentials)
svnclient = pysvn.Client()
svnclient.callback_get_login = get_login
return svnclient
def revision_from_string(r_str):
if r_str is None:
pass
elif r_str == "HEAD":
return pysvn.Revision( pysvn.opt_revision_kind.head )
elif r_str == "WORKING":
return pysvn.Revision( pysvn.opt_revision_kind.working )
elif r_str == "BASE":
return pysvn.Revision( pysvn.opt_revision_kind.base )
else:
# Is it a number?
try:
r = int(r_str)
return pysvn.Revision( pysvn.opt_revision_kind.number, r)
except:
pass
return None
def revision_exists(client, path, revision):
try:
client.list(path, revision=revision)
return True
except pysvn.ClientError:
return False
def revision_is_dir(client, path, revision):
"""Returns True if the given path+revision is a directory.
@raises a pysvn.ClientError if it does not exist.
"""
# XXX I *think* the first element of the list is the requested object, and
# subsequent items are its possible children (so ignore them).
list_object, _ = client.list(path, revision=revision)[0]
# list_object is a PySvnList object
return list_object.kind == pysvn.node_kind.dir
class PysvnListStatWrapper:
'''Wrap a pysvn listing object to look somewhat like a result of
os.stat.
'''
def __init__(self, pysvn_list):
self.pysvn_list = pysvn_list
def __getattr__(self, name):
try:
if name == 'st_mode':
# Special magic needed.
if self.pysvn_list.kind == pysvn.node_kind.dir:
return stat.S_IFDIR
else:
return stat.S_IFREG
return value
return getattr(self.pysvn_list,
{'st_mtime': 'time',
'st_size': 'size',
}[name])
except AttributeError, KeyError:
raise AttributeError, name
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