# -*- coding: utf-8 -*-

# Copyright (C) 2007 Daniel Holth <dholth@fastmail.fm>

# This is a stripped-down version of the original bzr-svn transport.py,

# Copyright (C) 2006 Jelmer Vernooij <jelmer@samba.org>

# 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, see <http://www.gnu.org/licenses/>.

from __future__ import absolute_import

import svn.client

import svn.core

import svn.ra

Pool = svn.core.Pool

SubversionException = svn.core.SubversionException

# Some older versions of the Python bindings need to be

# explicitly initialized. But what we want to do probably

# won't work worth a darn against those libraries anyway!

svn.ra.initialize()

svn_config = svn.core.svn_config_get_config(None)

def _create_auth_baton(pool):

    """Create a Subversion authentication baton. """

    import svn.client

    # Give the client context baton a suite of authentication

    # providers.h

    providers = [

        svn.client.get_simple_provider(pool),

        svn.client.get_username_provider(pool),

        svn.client.get_ssl_client_cert_file_provider(pool),

        svn.client.get_ssl_client_cert_pw_file_provider(pool),

        svn.client.get_ssl_server_trust_file_provider(pool),

        ]

    # Platform-dependent authentication methods

    getprovider = getattr(svn.core, 'svn_auth_get_platform_specific_provider',

                          None)

    if getprovider:

        # Available in svn >= 1.6

        for name in ('gnome_keyring', 'keychain', 'kwallet', 'windows'):

            for type in ('simple', 'ssl_client_cert_pw', 'ssl_server_trust'):

                p = getprovider(name, type, pool)

                if p:

                    providers.append(p)

    else:

        if util.safehasattr(svn.client, 'get_windows_simple_provider'):

            providers.append(svn.client.get_windows_simple_provider(pool))

    return svn.core.svn_auth_open(providers, pool)

class NotBranchError(SubversionException):

    pass

class SvnRaTransport(object):

    """

    Open an ra connection to a Subversion repository.

    """

    def __init__(self, url="", ra=None):

        self.pool = Pool()

        self.svn_url = url

        self.username = ''

        self.password = ''

        # Only Subversion 1.4 has reparent()

        if ra is None or not util.safehasattr(svn.ra, 'reparent'):

            self.client = svn.client.create_context(self.pool)

            ab = _create_auth_baton(self.pool)

            if False:

                svn.core.svn_auth_set_parameter(

                    ab, svn.core.SVN_AUTH_PARAM_DEFAULT_USERNAME, self.username)

                svn.core.svn_auth_set_parameter(

                    ab, svn.core.SVN_AUTH_PARAM_DEFAULT_PASSWORD, self.password)

            self.client.auth_baton = ab

            self.client.config = svn_config

            try:

                self.ra = svn.client.open_ra_session(

                    self.svn_url,

                    self.client, self.pool)

            except SubversionException as xxx_todo_changeme:

                (inst, num) = xxx_todo_changeme.args

                if num in (svn.core.SVN_ERR_RA_ILLEGAL_URL,

                           svn.core.SVN_ERR_RA_LOCAL_REPOS_OPEN_FAILED,

                           svn.core.SVN_ERR_BAD_URL):

                    raise NotBranchError(url)

                raise

        else:

            self.ra = ra

            svn.ra.reparent(self.ra, self.svn_url.encode('utf8'))

    class Reporter(object):

        def __init__(self, reporter_data):

            self._reporter, self._baton = reporter_data

        def set_path(self, path, revnum, start_empty, lock_token, pool=None):

            svn.ra.reporter2_invoke_set_path(self._reporter, self._baton,

                        path, revnum, start_empty, lock_token, pool)

        def delete_path(self, path, pool=None):

            svn.ra.reporter2_invoke_delete_path(self._reporter, self._baton,

                    path, pool)

        def link_path(self, path, url, revision, start_empty, lock_token,

                      pool=None):

            svn.ra.reporter2_invoke_link_path(self._reporter, self._baton,

                    path, url, revision, start_empty, lock_token,

                    pool)

        def finish_report(self, pool=None):

            svn.ra.reporter2_invoke_finish_report(self._reporter,

                    self._baton, pool)

        def abort_report(self, pool=None):

            svn.ra.reporter2_invoke_abort_report(self._reporter,

                    self._baton, pool)

    def do_update(self, revnum, path, *args, **kwargs):

        return self.Reporter(svn.ra.do_update(self.ra, revnum, path,

                                              *args, **kwargs))