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# Copyright (C) 2006-2010 Canonical Ltd
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# Copyright (C) 2006, 2007, 2008, 2009 Canonical Ltd
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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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repository as _mod_repository,
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revision as _mod_revision,
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from bzrlib.branch import BranchReferenceFormat, BranchWriteLockResult
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from bzrlib.branch import BranchReferenceFormat
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from bzrlib.bzrdir import BzrDir, RemoteBzrDirFormat
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from bzrlib.decorators import needs_read_lock, needs_write_lock, only_raises
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from bzrlib.decorators import needs_read_lock, needs_write_lock
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from bzrlib.errors import (
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SmartProtocolError,
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from bzrlib.lockable_files import LockableFiles
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from bzrlib.smart import client, vfs, repository as smart_repo
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from bzrlib.revision import ensure_null, NULL_REVISION
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from bzrlib.repository import RepositoryWriteLockResult
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from bzrlib.trace import mutter, note, warning
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class RemoteBzrDir(BzrDir, _RpcHelper):
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"""Control directory on a remote server, accessed via bzr:// or similar."""
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def __init__(self, transport, format, _client=None, _force_probe=False):
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def __init__(self, transport, format, _client=None):
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"""Construct a RemoteBzrDir.
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:param _client: Private parameter for testing. Disables probing and the
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# this object holds a delegated bzrdir that uses file-level operations
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# to talk to the other side
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self._real_bzrdir = None
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self._has_working_tree = None
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# 1-shot cache for the call pattern 'create_branch; open_branch' - see
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# create_branch for details.
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self._next_open_branch_result = None
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self._client = client._SmartClient(medium)
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self._client = _client
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return '%s(%r)' % (self.__class__.__name__, self._client)
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def _probe_bzrdir(self):
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medium = self._client._medium
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path = self._path_for_remote_call(self._client)
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if medium._is_remote_before((2, 1)):
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self._rpc_open_2_1(path)
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except errors.UnknownSmartMethod:
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medium._remember_remote_is_before((2, 1))
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def _rpc_open_2_1(self, path):
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response = self._call('BzrDir.open_2.1', path)
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if response == ('no',):
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raise errors.NotBranchError(path=self.root_transport.base)
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elif response[0] == 'yes':
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if response[1] == 'yes':
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self._has_working_tree = True
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elif response[1] == 'no':
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self._has_working_tree = False
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raise errors.UnexpectedSmartServerResponse(response)
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raise errors.UnexpectedSmartServerResponse(response)
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def _rpc_open(self, path):
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response = self._call('BzrDir.open', path)
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if response not in [('yes',), ('no',)]:
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raise errors.UnexpectedSmartServerResponse(response)
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if response == ('no',):
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raise errors.NotBranchError(path=self.root_transport.base)
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raise errors.NotBranchError(path=transport.base)
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def _ensure_real(self):
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"""Ensure that there is a _real_bzrdir set.
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Used before calls to self._real_bzrdir.
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if not self._real_bzrdir:
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if 'hpssvfs' in debug.debug_flags:
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warning('VFS BzrDir access triggered\n%s',
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''.join(traceback.format_stack()))
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self._real_bzrdir = BzrDir.open_from_transport(
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self.root_transport, _server_formats=False)
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self._format._network_name = \
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self._ensure_real()
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self._real_bzrdir.destroy_repository()
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def create_branch(self, name=None):
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def create_branch(self):
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# as per meta1 formats - just delegate to the format object which may
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# be parameterised.
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real_branch = self._format.get_branch_format().initialize(self,
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real_branch = self._format.get_branch_format().initialize(self)
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if not isinstance(real_branch, RemoteBranch):
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result = RemoteBranch(self, self.find_repository(), real_branch,
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result = RemoteBranch(self, self.find_repository(), real_branch)
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result = real_branch
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# BzrDir.clone_on_transport() uses the result of create_branch but does
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self._next_open_branch_result = result
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def destroy_branch(self, name=None):
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def destroy_branch(self):
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"""See BzrDir.destroy_branch"""
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self._ensure_real()
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self._real_bzrdir.destroy_branch(name=name)
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self._real_bzrdir.destroy_branch()
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self._next_open_branch_result = None
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def create_workingtree(self, revision_id=None, from_branch=None):
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def _get_branch_reference(self):
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path = self._path_for_remote_call(self._client)
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medium = self._client._medium
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('BzrDir.open_branchV3', (2, 1)),
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('BzrDir.open_branchV2', (1, 13)),
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('BzrDir.open_branch', None),
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for verb, required_version in candidate_calls:
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if required_version and medium._is_remote_before(required_version):
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if not medium._is_remote_before((1, 13)):
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response = self._call(verb, path)
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response = self._call('BzrDir.open_branchV2', path)
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if response[0] not in ('ref', 'branch'):
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raise errors.UnexpectedSmartServerResponse(response)
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except errors.UnknownSmartMethod:
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if required_version is None:
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medium._remember_remote_is_before(required_version)
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if verb == 'BzrDir.open_branch':
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if response[0] != 'ok':
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raise errors.UnexpectedSmartServerResponse(response)
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if response[1] != '':
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return ('ref', response[1])
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return ('branch', '')
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if response[0] not in ('ref', 'branch'):
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medium._remember_remote_is_before((1, 13))
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response = self._call('BzrDir.open_branch', path)
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if response[0] != 'ok':
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raise errors.UnexpectedSmartServerResponse(response)
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if response[1] != '':
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return ('ref', response[1])
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return ('branch', '')
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def _get_tree_branch(self):
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"""See BzrDir._get_tree_branch()."""
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return None, self.open_branch()
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def open_branch(self, name=None, unsupported=False,
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ignore_fallbacks=False):
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def open_branch(self, _unsupported=False, ignore_fallbacks=False):
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raise NotImplementedError('unsupported flag support not implemented yet.')
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if self._next_open_branch_result is not None:
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# See create_branch for details.
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if response[0] == 'ref':
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# a branch reference, use the existing BranchReference logic.
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format = BranchReferenceFormat()
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return format.open(self, name=name, _found=True,
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location=response[1], ignore_fallbacks=ignore_fallbacks)
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return format.open(self, _found=True, location=response[1],
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ignore_fallbacks=ignore_fallbacks)
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branch_format_name = response[1]
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if not branch_format_name:
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branch_format_name = None
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format = RemoteBranchFormat(network_name=branch_format_name)
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return RemoteBranch(self, self.find_repository(), format=format,
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setup_stacking=not ignore_fallbacks, name=name)
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setup_stacking=not ignore_fallbacks)
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def _open_repo_v1(self, path):
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verb = 'BzrDir.find_repository'
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raise errors.NoRepositoryPresent(self)
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def has_workingtree(self):
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if self._has_working_tree is None:
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self._has_working_tree = self._real_bzrdir.has_workingtree()
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return self._has_working_tree
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def open_workingtree(self, recommend_upgrade=True):
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if self.has_workingtree():
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if self._real_bzrdir.has_workingtree():
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raise errors.NotLocalUrl(self.root_transport)
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raise errors.NoWorkingTree(self.root_transport.base)
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"""Return the path to be used for this bzrdir in a remote call."""
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return client.remote_path_from_transport(self.root_transport)
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def get_branch_transport(self, branch_format, name=None):
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def get_branch_transport(self, branch_format):
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self._ensure_real()
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return self._real_bzrdir.get_branch_transport(branch_format, name=name)
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return self._real_bzrdir.get_branch_transport(branch_format)
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def get_repository_transport(self, repository_format):
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self._ensure_real()
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return self._custom_format._fetch_reconcile
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def get_format_description(self):
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return 'Remote: ' + self._custom_format.get_format_description()
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return 'bzr remote repository'
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def __eq__(self, other):
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return self.__class__ is other.__class__
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def check_conversion_target(self, target_format):
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if self.rich_root_data and not target_format.rich_root_data:
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raise errors.BadConversionTarget(
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'Does not support rich root data.', target_format)
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if (self.supports_tree_reference and
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not getattr(target_format, 'supports_tree_reference', False)):
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raise errors.BadConversionTarget(
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'Does not support nested trees', target_format)
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def network_name(self):
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if self._network_name:
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return self._network_name
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return self._custom_format._serializer
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class RemoteRepository(_RpcHelper, lock._RelockDebugMixin,
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bzrdir.ControlComponent):
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class RemoteRepository(_RpcHelper):
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"""Repository accessed over rpc.
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For the moment most operations are performed using local transport-backed
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# Additional places to query for data.
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self._fallback_repositories = []
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def user_transport(self):
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return self.bzrdir.user_transport
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def control_transport(self):
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# XXX: Normally you shouldn't directly get at the remote repository
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# transport, but I'm not sure it's worth making this method
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# optional -- mbp 2010-04-21
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return self.bzrdir.get_repository_transport(None)
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def __str__(self):
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return "%s(%s)" % (self.__class__.__name__, self.base)
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parents_provider = self._make_parents_provider(other_repository)
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return graph.Graph(parents_provider)
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def get_known_graph_ancestry(self, revision_ids):
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"""Return the known graph for a set of revision ids and their ancestors.
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st = static_tuple.StaticTuple
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revision_keys = [st(r_id).intern() for r_id in revision_ids]
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known_graph = self.revisions.get_known_graph_ancestry(revision_keys)
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return graph.GraphThunkIdsToKeys(known_graph)
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def gather_stats(self, revid=None, committers=None):
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"""See Repository.gather_stats()."""
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path = self.bzrdir._path_for_remote_call(self._client)
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def is_write_locked(self):
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return self._lock_mode == 'w'
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def _warn_if_deprecated(self, branch=None):
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# If we have a real repository, the check will be done there, if we
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# don't the check will be done remotely.
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def lock_read(self):
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"""Lock the repository for read operations.
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:return: An object with an unlock method which will release the lock
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# wrong eventually - want a local lock cache context
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if not self._lock_mode:
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self._note_lock('r')
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self._lock_mode = 'r'
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self._lock_count = 1
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self._unstacked_provider.enable_cache(cache_misses=True)
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# state, so always add a lock here. If a caller passes us a locked
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# repository, they are responsible for unlocking it later.
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repository.lock_read()
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self._check_fallback_repository(repository)
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self._fallback_repositories.append(repository)
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# If self._real_repository was parameterised already (e.g. because a
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# _real_branch had its get_stacked_on_url method called), then the
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# repository to be added may already be in the _real_repositories list.
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if self._real_repository is not None:
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fallback_locations = [repo.user_url for repo in
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fallback_locations = [repo.bzrdir.root_transport.base for repo in
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self._real_repository._fallback_repositories]
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if repository.user_url not in fallback_locations:
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if repository.bzrdir.root_transport.base not in fallback_locations:
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self._real_repository.add_fallback_repository(repository)
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def _check_fallback_repository(self, repository):
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"""Check that this repository can fallback to repository safely.
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Raise an error if not.
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:param repository: A repository to fallback to.
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return _mod_repository.InterRepository._assert_same_model(
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def add_inventory(self, revid, inv, parents):
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self._ensure_real()
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return self._real_repository.add_inventory(revid, inv, parents)
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def add_inventory_by_delta(self, basis_revision_id, delta, new_revision_id,
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parents, basis_inv=None, propagate_caches=False):
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self._ensure_real()
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return self._real_repository.add_inventory_by_delta(basis_revision_id,
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delta, new_revision_id, parents, basis_inv=basis_inv,
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propagate_caches=propagate_caches)
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delta, new_revision_id, parents)
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def add_revision(self, rev_id, rev, inv=None, config=None):
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self._ensure_real()
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self._ensure_real()
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return self._real_repository.get_inventory(revision_id)
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def iter_inventories(self, revision_ids, ordering=None):
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def iter_inventories(self, revision_ids, ordering='unordered'):
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self._ensure_real()
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return self._real_repository.iter_inventories(revision_ids, ordering)
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return self._real_repository.get_signature_text(revision_id)
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@needs_read_lock
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def _get_inventory_xml(self, revision_id):
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return self._real_repository._get_inventory_xml(revision_id)
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def get_inventory_xml(self, revision_id):
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return self._real_repository.get_inventory_xml(revision_id)
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def deserialise_inventory(self, revision_id, xml):
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return self._real_repository.deserialise_inventory(revision_id, xml)
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def reconcile(self, other=None, thorough=False):
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self._ensure_real()
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return self._real_repository.inventories
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@needs_write_lock
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def pack(self, hint=None, clean_obsolete_packs=False):
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def pack(self, hint=None):
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"""Compress the data within the repository.
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This is not currently implemented within the smart server.
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self._ensure_real()
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return self._real_repository.pack(hint=hint, clean_obsolete_packs=clean_obsolete_packs)
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return self._real_repository.pack(hint=hint)
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def revisions(self):
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def insert_stream(self, stream, src_format, resume_tokens):
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target = self.target_repo
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target._unstacked_provider.missing_keys.clear()
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candidate_calls = [('Repository.insert_stream_1.19', (1, 19))]
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candidate_calls = [('Repository.insert_stream_1.18', (1, 18))]
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if target._lock_token:
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candidate_calls.append(('Repository.insert_stream_locked', (1, 14)))
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lock_args = (target._lock_token or '',)
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return self._insert_real(stream, src_format, resume_tokens)
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self._last_inv_record = None
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self._last_substream = None
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if required_version < (1, 19):
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if required_version < (1, 18):
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# Remote side doesn't support inventory deltas. Wrap the stream to
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# make sure we don't send any. If the stream contains inventory
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# deltas we'll interrupt the smart insert_stream request and
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# The stream included an inventory-delta record, but the remote
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# side isn't new enough to support them. So we need to send the
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# rest of the stream via VFS.
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self.target_repo.refresh_data()
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return self._resume_stream_with_vfs(response, src_format)
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if response[0][0] == 'missing-basis':
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tokens, missing_keys = bencode.bdecode_as_tuple(response[0][1])
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source = repo._get_source(self.to_format)
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if isinstance(source, RemoteStreamSource):
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source = repo._real_repository._get_source(self.to_format)
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return repository.StreamSource.get_stream(source, search)
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return source.get_stream(search)
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def _get_stream(self, repo, search):
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search_bytes = repo._serialise_search_result(search)
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args = (path, self.to_format.network_name())
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candidate_verbs = [
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('Repository.get_stream_1.19', (1, 19)),
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('Repository.get_stream_1.18', (1, 18)),
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('Repository.get_stream', (1, 13))]
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found_verb = False
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for verb, version in candidate_verbs:
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:param search: The overall search to satisfy with streams.
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:param sources: A list of Repository objects to query.
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self.from_serialiser = self.from_repository._format._serializer
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self.serialiser = self.to_format._serializer
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self.seen_revs = set()
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self.referenced_revs = set()
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# If there are heads in the search, or the key count is > 0, we are not
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def missing_parents_rev_handler(self, substream):
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for content in substream:
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revision_bytes = content.get_bytes_as('fulltext')
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revision = self.from_serialiser.read_revision_from_string(
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revision = self.serialiser.read_revision_from_string(revision_bytes)
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self.seen_revs.add(content.key[-1])
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self.referenced_revs.update(revision.parent_ids)
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self._network_name)
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def get_format_description(self):
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return 'Remote: ' + self._custom_format.get_format_description()
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return 'Remote BZR Branch'
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def network_name(self):
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return self._network_name
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def open(self, a_bzrdir, name=None, ignore_fallbacks=False):
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return a_bzrdir.open_branch(name=name,
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ignore_fallbacks=ignore_fallbacks)
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def open(self, a_bzrdir, ignore_fallbacks=False):
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return a_bzrdir.open_branch(ignore_fallbacks=ignore_fallbacks)
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def _vfs_initialize(self, a_bzrdir, name):
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def _vfs_initialize(self, a_bzrdir):
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# Initialisation when using a local bzrdir object, or a non-vfs init
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# method is not available on the server.
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# self._custom_format is always set - the start of initialize ensures
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if isinstance(a_bzrdir, RemoteBzrDir):
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a_bzrdir._ensure_real()
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result = self._custom_format.initialize(a_bzrdir._real_bzrdir,
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result = self._custom_format.initialize(a_bzrdir._real_bzrdir)
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# We assume the bzrdir is parameterised; it may not be.
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result = self._custom_format.initialize(a_bzrdir, name)
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result = self._custom_format.initialize(a_bzrdir)
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if (isinstance(a_bzrdir, RemoteBzrDir) and
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not isinstance(result, RemoteBranch)):
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result = RemoteBranch(a_bzrdir, a_bzrdir.find_repository(), result,
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result = RemoteBranch(a_bzrdir, a_bzrdir.find_repository(), result)
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def initialize(self, a_bzrdir, name=None):
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def initialize(self, a_bzrdir):
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# 1) get the network name to use.
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if self._custom_format:
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network_name = self._custom_format.network_name()
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network_name = reference_format.network_name()
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# Being asked to create on a non RemoteBzrDir:
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if not isinstance(a_bzrdir, RemoteBzrDir):
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return self._vfs_initialize(a_bzrdir, name=name)
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return self._vfs_initialize(a_bzrdir)
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medium = a_bzrdir._client._medium
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if medium._is_remote_before((1, 13)):
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return self._vfs_initialize(a_bzrdir, name=name)
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return self._vfs_initialize(a_bzrdir)
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# Creating on a remote bzr dir.
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# 2) try direct creation via RPC
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path = a_bzrdir._path_for_remote_call(a_bzrdir._client)
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if name is not None:
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# XXX JRV20100304: Support creating colocated branches
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raise errors.NoColocatedBranchSupport(self)
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verb = 'BzrDir.create_branch'
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response = a_bzrdir._call(verb, path, network_name)
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except errors.UnknownSmartMethod:
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# Fallback - use vfs methods
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medium._remember_remote_is_before((1, 13))
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return self._vfs_initialize(a_bzrdir, name=name)
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return self._vfs_initialize(a_bzrdir)
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if response[0] != 'ok':
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raise errors.UnexpectedSmartServerResponse(response)
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# Turn the response into a RemoteRepository object.
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a_bzrdir._client)
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remote_repo = RemoteRepository(repo_bzrdir, repo_format)
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remote_branch = RemoteBranch(a_bzrdir, remote_repo,
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format=format, setup_stacking=False, name=name)
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format=format, setup_stacking=False)
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# XXX: We know this is a new branch, so it must have revno 0, revid
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# NULL_REVISION. Creating the branch locked would make this be unable
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# to be wrong; here its simply very unlikely to be wrong. RBC 20090225
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return self._custom_format.supports_set_append_revisions_only()
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class RemoteBranch(branch.Branch, _RpcHelper, lock._RelockDebugMixin):
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class RemoteBranch(branch.Branch, _RpcHelper):
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"""Branch stored on a server accessed by HPSS RPC.
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At the moment most operations are mapped down to simple file operations.
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def __init__(self, remote_bzrdir, remote_repository, real_branch=None,
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_client=None, format=None, setup_stacking=True, name=None):
2057
_client=None, format=None, setup_stacking=True):
2167
2058
"""Create a RemoteBranch instance.
2169
2060
:param real_branch: An optional local implementation of the branch
2175
2066
:param setup_stacking: If True make an RPC call to determine the
2176
2067
stacked (or not) status of the branch. If False assume the branch
2177
2068
is not stacked.
2178
:param name: Colocated branch name
2180
2070
# We intentionally don't call the parent class's __init__, because it
2181
2071
# will try to assign to self.tags, which is a property in this subclass.
2200
2090
self._real_branch = None
2201
2091
# Fill out expected attributes of branch for bzrlib API users.
2202
2092
self._clear_cached_state()
2203
# TODO: deprecate self.base in favor of user_url
2204
self.base = self.bzrdir.user_url
2093
self.base = self.bzrdir.root_transport.base
2206
2094
self._control_files = None
2207
2095
self._lock_mode = None
2208
2096
self._lock_token = None
2219
2107
self._real_branch._format.network_name()
2221
2109
self._format = format
2222
# when we do _ensure_real we may need to pass ignore_fallbacks to the
2223
# branch.open_branch method.
2224
self._real_ignore_fallbacks = not setup_stacking
2225
2110
if not self._format._network_name:
2226
2111
# Did not get from open_branchV2 - old server.
2227
2112
self._ensure_real()
2272
2157
raise AssertionError('smart server vfs must be enabled '
2273
2158
'to use vfs implementation')
2274
2159
self.bzrdir._ensure_real()
2275
self._real_branch = self.bzrdir._real_bzrdir.open_branch(
2276
ignore_fallbacks=self._real_ignore_fallbacks, name=self._name)
2160
self._real_branch = self.bzrdir._real_bzrdir.open_branch()
2277
2161
if self.repository._real_repository is None:
2278
2162
# Give the remote repository the matching real repo.
2279
2163
real_repo = self._real_branch.repository
2383
2267
medium = self._client._medium
2384
2268
if medium._is_remote_before((1, 18)):
2385
2269
self._vfs_set_tags_bytes(bytes)
2389
2272
self._remote_path(), self._lock_token, self._repo_lock_token)
2394
2277
self._vfs_set_tags_bytes(bytes)
2396
2279
def lock_read(self):
2397
"""Lock the branch for read operations.
2399
:return: An object with an unlock method which will release the lock
2402
2280
self.repository.lock_read()
2403
2281
if not self._lock_mode:
2404
self._note_lock('r')
2405
2282
self._lock_mode = 'r'
2406
2283
self._lock_count = 1
2407
2284
if self._real_branch is not None:
2408
2285
self._real_branch.lock_read()
2410
2287
self._lock_count += 1
2413
2289
def _remote_lock_write(self, token):
2414
2290
if token is None:
2415
2291
branch_token = repo_token = ''
2417
2293
branch_token = token
2418
repo_token = self.repository.lock_write().repository_token
2294
repo_token = self.repository.lock_write()
2419
2295
self.repository.unlock()
2420
2296
err_context = {'token': token}
2421
2297
response = self._call(
2458
2333
self._lock_count += 1
2459
2334
# Re-lock the repository too.
2460
2335
self.repository.lock_write(self._repo_lock_token)
2461
return BranchWriteLockResult(self.unlock, self._lock_token or None)
2336
return self._lock_token or None
2463
2338
def _unlock(self, branch_token, repo_token):
2464
2339
err_context = {'token': str((branch_token, repo_token))}
2886
2759
'Missing key %r in context %r', key_err.args[0], context)
2889
if err.error_verb == 'IncompatibleRepositories':
2890
raise errors.IncompatibleRepositories(err.error_args[0],
2891
err.error_args[1], err.error_args[2])
2892
elif err.error_verb == 'NoSuchRevision':
2762
if err.error_verb == 'NoSuchRevision':
2893
2763
raise NoSuchRevision(find('branch'), err.error_args[0])
2894
2764
elif err.error_verb == 'nosuchrevision':
2895
2765
raise NoSuchRevision(find('repository'), err.error_args[0])
2896
elif err.error_verb == 'nobranch':
2897
if len(err.error_args) >= 1:
2898
extra = err.error_args[0]
2901
raise errors.NotBranchError(path=find('bzrdir').root_transport.base,
2766
elif err.error_tuple == ('nobranch',):
2767
raise errors.NotBranchError(path=find('bzrdir').root_transport.base)
2903
2768
elif err.error_verb == 'norepository':
2904
2769
raise errors.NoRepositoryPresent(find('bzrdir'))
2905
2770
elif err.error_verb == 'LockContention':
added
removed
bzrlib/remote.py
