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# Copyright (C) 2006, 2007 Canonical Ltd
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# TODO: At some point, handle upgrades by just passing the whole request
# across to run on the server.
from urlparse import urlparse
from bzrlib import branch, errors, repository
from bzrlib.branch import BranchReferenceFormat
from bzrlib.bzrdir import BzrDir, BzrDirFormat, RemoteBzrDirFormat
from bzrlib.revision import NULL_REVISION
from bzrlib.smart import client, vfs
from bzrlib.urlutils import unescape
# Note: RemoteBzrDirFormat is in bzrdir.py
class RemoteBzrDir(BzrDir):
"""Control directory on a remote server, accessed by HPSS."""
def __init__(self, transport, _client=None):
"""Construct a RemoteBzrDir.
:param _client: Private parameter for testing. Disables probing and the
use of a real bzrdir.
"""
BzrDir.__init__(self, transport, RemoteBzrDirFormat())
if _client is not None:
self.client = _client
return
self.client = transport.get_smart_client()
# this object holds a delegated bzrdir that uses file-level operations
# to talk to the other side
# XXX: We should go into find_format, but not allow it to find
# RemoteBzrDirFormat and make sure it finds the real underlying format.
# THIS IS A COMPLETE AND UTTER LIE.
# XXX: XXX: XXX: must be removed before merging to mainline
# SMART_SERVER_MERGE_BLOCKER
default_format = BzrDirFormat.get_default_format()
self._real_bzrdir = default_format.open(transport, _found=True)
smartclient = client.SmartClient(self.client)
path = self._path_for_remote_call(smartclient)
#self._real_bzrdir._format.probe_transport(transport)
response = smartclient.call('probe_dont_use', path)
if response == ('no',):
raise errors.NotBranchError(path=transport.base)
def create_repository(self, shared=False):
return RemoteRepository(
self, self._real_bzrdir.create_repository(shared=shared))
def create_branch(self):
real_branch = self._real_bzrdir.create_branch()
real_repository = real_branch.repository
remote_repository = RemoteRepository(self, real_repository)
return RemoteBranch(self, remote_repository, real_branch)
def create_workingtree(self, revision_id=None):
real_workingtree = self._real_bzrdir.create_workingtree(revision_id=revision_id)
return RemoteWorkingTree(self, real_workingtree)
def open_branch(self, _unsupported=False):
assert _unsupported == False, 'unsupported flag support not implemented yet.'
smartclient = client.SmartClient(self.client)
path = self._path_for_remote_call(smartclient)
response = smartclient.call('BzrDir.open_branch', path)
assert response[0] == 'ok', 'unexpected response code %s' % (response,)
if response[0] != 'ok':
# this should probably be a regular translate no ?
raise errors.NotBranchError(path=self.root_transport.base)
if response[1] == '':
# branch at this location.
if vfs.vfs_enabled():
# if the VFS is enabled, create a local object using the VFS.
real_branch = self._real_bzrdir.open_branch(unsupported=_unsupported)
# This branch accessed through the smart server, so wrap the
# file-level objects.
real_repository = real_branch.repository
remote_repository = RemoteRepository(self, real_repository)
return RemoteBranch(self, remote_repository, real_branch)
else:
# otherwise just create a proxy for the branch.
return RemoteBranch(self, self.find_repository())
else:
# a branch reference, use the existing BranchReference logic.
format = BranchReferenceFormat()
return format.open(self, _found=True, location=response[1])
def open_repository(self):
smartclient = client.SmartClient(self.client)
path = self._path_for_remote_call(smartclient)
response = smartclient.call('BzrDir.find_repository', path)
assert response[0] in ('ok', 'norepository'), \
'unexpected response code %s' % (response,)
if response[0] == 'norepository':
raise errors.NoRepositoryPresent(self)
if response[1] == '':
if vfs.vfs_enabled():
return RemoteRepository(self, self._real_bzrdir.open_repository())
else:
return RemoteRepository(self)
else:
raise errors.NoRepositoryPresent(self)
def open_workingtree(self):
return RemoteWorkingTree(self, self._real_bzrdir.open_workingtree())
def _path_for_remote_call(self, client):
"""Return the path to be used for this bzrdir in a remote call."""
return client.remote_path_from_transport(self.root_transport)
def get_branch_transport(self, branch_format):
return self._real_bzrdir.get_branch_transport(branch_format)
def get_repository_transport(self, repository_format):
return self._real_bzrdir.get_repository_transport(repository_format)
def get_workingtree_transport(self, workingtree_format):
return self._real_bzrdir.get_workingtree_transport(workingtree_format)
def can_convert_format(self):
"""Upgrading of remote bzrdirs is not supported yet."""
return False
def needs_format_conversion(self, format=None):
"""Upgrading of remote bzrdirs is not supported yet."""
return False
class RemoteRepositoryFormat(repository.RepositoryFormat):
"""Format for repositories accessed over rpc.
Instances of this repository are represented by RemoteRepository
instances.
"""
_matchingbzrdir = RemoteBzrDirFormat
def initialize(self, a_bzrdir, shared=False):
assert isinstance(a_bzrdir, RemoteBzrDir)
return a_bzrdir.create_repository(shared=shared)
def open(self, a_bzrdir):
assert isinstance(a_bzrdir, RemoteBzrDir)
return a_bzrdir.open_repository()
def get_format_description(self):
return 'bzr remote repository'
def __eq__(self, other):
return self.__class__ == other.__class__
rich_root_data = False
class RemoteRepository(object):
"""Repository accessed over rpc.
For the moment everything is delegated to IO-like operations over
the transport.
"""
def __init__(self, remote_bzrdir, real_repository=None):
"""Create a RemoteRepository instance.
:param remote_bzrdir: The bzrdir hosting this repository.
:param real_repository: If not None, a local implementation of the
repository logic for the repository, usually accessing the data
via the VFS.
"""
if real_repository:
self._real_repository = real_repository
self.bzrdir = remote_bzrdir
self._client = client.SmartClient(self.bzrdir.client)
self._format = RemoteRepositoryFormat()
def has_revision(self, revision_id):
"""See Repository.has_revision()."""
path = self.bzrdir._path_for_remote_call(self._client)
response = self._client.call('Repository.has_revision', path, revision_id.encode('utf8'))
assert response[0] in ('ok', 'no'), 'unexpected response code %s' % (response,)
return response[0] == 'ok'
class RemoteBranchFormat(branch.BranchFormat):
def open(self, a_bzrdir):
assert isinstance(a_bzrdir, RemoteBzrDir)
return a_bzrdir.open_branch()
def initialize(self, a_bzrdir):
assert isinstance(a_bzrdir, RemoteBzrDir)
return a_bzrdir.create_branch()
class RemoteBranch(branch.Branch):
"""Branch stored on a server accessed by HPSS RPC.
At the moment most operations are mapped down to simple file operations.
"""
def __init__(self, remote_bzrdir, remote_repository, real_branch=None,
_client=None):
"""Create a RemoteBranch instance.
:param real_branch: An optional local implementation of the branch
format, usually accessing the data via the VFS.
:param _client: Private parameter for testing.
"""
self.bzrdir = remote_bzrdir
if _client is not None:
self._client = _client
else:
self._client = client.SmartClient(self.bzrdir.client)
self.repository = remote_repository
if real_branch is not None:
self._real_branch = real_branch
self._format = RemoteBranchFormat()
self.base = self.bzrdir.root_transport.base
def lock_read(self):
return self._real_branch.lock_read()
def lock_write(self):
return self._real_branch.lock_write()
def unlock(self):
return self._real_branch.unlock()
def break_lock(self):
return self._real_branch.break_lock()
def last_revision_info(self):
"""See Branch.last_revision_info()."""
path = self.bzrdir._path_for_remote_call(self._client)
response = self._client.call('Branch.last_revision_info', path)
assert response[0] == 'ok', 'unexpected response code %s' % (response,)
revno = int(response[1])
last_revision = response[2].decode('utf8')
if last_revision == '':
last_revision = NULL_REVISION
return (revno, last_revision)
def revision_history(self):
"""See Branch.revision_history()."""
# XXX: TODO: this does not cache the revision history for the duration
# of a lock, which is a bug - see the code for regular branches
# for details.
path = self.bzrdir._path_for_remote_call(self._client)
response = self._client.call2('Branch.revision_history', path)
assert response[0][0] == 'ok', 'unexpected response code %s' % (response[0],)
result = response[1].read_body_bytes().decode('utf8').split('\x00')
if result == ['']:
return []
return result
def set_revision_history(self, rev_history):
return self._real_branch.set_revision_history(rev_history)
def get_parent(self):
return self._real_branch.get_parent()
def set_parent(self, url):
return self._real_branch.set_parent(url)
class RemoteWorkingTree(object):
def __init__(self, remote_bzrdir, real_workingtree):
self.real_workingtree = real_workingtree
self.bzrdir = remote_bzrdir
def __getattr__(self, name):
# XXX: temporary way to lazily delegate everything to the real
# workingtree
return getattr(self.real_workingtree, name)
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