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# IVLE - Informatics Virtual Learning Environment
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# Copyright (C) 2008 The University of Melbourne
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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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# 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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# 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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# Module: Subversion utilities
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# Author: William Grant
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def create_auth_svn_client_autopass(username, save_credentials=False):
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"""Create a new pysvn client which is set up to automatically authenticate
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with the supplied user. The user's Subversion password is automatically
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looked up in the database.
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(Requires database access -- can't be used inside the jail.)
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@param username: IVLE/Subversion username.
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@param save_credentials: Save the user's credentials. Should be False when
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# Note: Must do this inside the function, since this file may be used in
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# the jail, and importing ivle.database crashes in the jail.
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from ivle.config import Config
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from ivle.database import User
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store = ivle.database.get_store(Config())
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user = store.find(User, User.login==unicode(username)).one()
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return create_auth_svn_client(username, user.svn_pass, save_credentials)
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def create_auth_svn_client(username, password, save_credentials=True):
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"""Create a new pysvn client which is set up to automatically authenticate
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with the supplied credentials.
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@param username: IVLE/Subversion username.
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@param password: Subversion password.
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@param save_credentials: Save the user's credentials. Should be False when
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username = str(username)
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password = str(password)
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def get_login(_realm, existing_login, _may_save):
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"""Callback function used by pysvn for authentication.
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realm, existing_login, _may_save: The 3 arguments passed by pysvn to
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The following has been determined empirically, not from docs:
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existing_login will be the name of the user who owns the process on
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the first attempt, "" on subsequent attempts. We use this fact.
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# Only provide credentials on the _first_ attempt.
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# If we're being asked again, then it means the credentials failed for
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# some reason and we should just fail. (This is not desirable, but it's
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# better than being asked an infinite number of times).
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return (existing_login != "", username, password, save_credentials)
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svnclient = pysvn.Client()
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svnclient.callback_get_login = get_login
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def revision_from_string(r_str):
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return pysvn.Revision( pysvn.opt_revision_kind.head )
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elif r_str == "WORKING":
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return pysvn.Revision( pysvn.opt_revision_kind.working )
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return pysvn.Revision( pysvn.opt_revision_kind.base )
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return pysvn.Revision( pysvn.opt_revision_kind.number, r)
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def revision_exists(client, path, revision):
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client.list(path, revision=revision)
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except pysvn.ClientError:
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def revision_is_dir(client, path, revision):
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"""Returns True if the given path+revision is a directory.
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@raises a pysvn.ClientError if it does not exist.
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# XXX I *think* the first element of the list is the requested object, and
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# subsequent items are its possible children (so ignore them).
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list_object, _ = client.list(path, revision=revision)[0]
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# list_object is a PySvnList object
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return list_object.kind == pysvn.node_kind.dir
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class PysvnListStatWrapper:
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'''Wrap a pysvn listing object to look somewhat like a result of
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def __init__(self, pysvn_list):
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self.pysvn_list = pysvn_list
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def __getattr__(self, name):
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if name == 'st_mode':
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# Special magic needed.
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if self.pysvn_list.kind == pysvn.node_kind.dir:
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return getattr(self.pysvn_list,
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except AttributeError, KeyError:
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raise AttributeError, name