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# Copyright (C) 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Reconfigure a bzrdir into a new tree/branch/repository layout"""
from bzrlib import (
branch,
bzrdir,
errors,
)
class Reconfigure(object):
def __init__(self, bzrdir, new_bound_location=None):
self.bzrdir = bzrdir
self.new_bound_location = new_bound_location
try:
self.repository = self.bzrdir.find_repository()
except errors.NoRepositoryPresent:
self.repository = None
else:
if (self.repository.bzrdir.root_transport.base ==
self.bzrdir.root_transport.base):
self.local_repository = self.repository
else:
self.local_repository = None
try:
branch = self.bzrdir.open_branch()
if branch.bzrdir.root_transport.base == bzrdir.root_transport.base:
self.local_branch = branch
self.referenced_branch = None
else:
self.local_branch = None
self.referenced_branch = branch
except errors.NotBranchError:
self.local_branch = None
self.referenced_branch = None
try:
self.tree = bzrdir.open_workingtree()
except errors.NoWorkingTree:
self.tree = None
self._unbind = False
self._bind = False
self._destroy_reference = False
self._create_reference = False
self._destroy_branch = False
self._create_branch = False
self._destroy_tree = False
self._create_tree = False
self._create_repository = False
self._destroy_repository = False
self._repository_trees = None
@staticmethod
def to_branch(bzrdir):
"""Return a Reconfiguration to convert this bzrdir into a branch
:param bzrdir: The bzrdir to reconfigure
:raise errors.AlreadyBranch: if bzrdir is already a branch
"""
reconfiguration = Reconfigure(bzrdir)
reconfiguration._plan_changes(want_tree=False, want_branch=True,
want_bound=False, want_reference=False)
if not reconfiguration.changes_planned():
raise errors.AlreadyBranch(bzrdir)
return reconfiguration
@staticmethod
def to_tree(bzrdir):
"""Return a Reconfiguration to convert this bzrdir into a tree
:param bzrdir: The bzrdir to reconfigure
:raise errors.AlreadyTree: if bzrdir is already a tree
"""
reconfiguration = Reconfigure(bzrdir)
reconfiguration._plan_changes(want_tree=True, want_branch=True,
want_bound=False, want_reference=False)
if not reconfiguration.changes_planned():
raise errors.AlreadyTree(bzrdir)
return reconfiguration
@staticmethod
def to_checkout(bzrdir, bound_location=None):
"""Return a Reconfiguration to convert this bzrdir into a checkout
:param bzrdir: The bzrdir to reconfigure
:param bound_location: The location the checkout should be bound to.
:raise errors.AlreadyCheckout: if bzrdir is already a checkout
"""
reconfiguration = Reconfigure(bzrdir, bound_location)
reconfiguration._plan_changes(want_tree=True, want_branch=True,
want_bound=True, want_reference=False)
if not reconfiguration.changes_planned():
raise errors.AlreadyCheckout(bzrdir)
return reconfiguration
@classmethod
def to_lightweight_checkout(klass, bzrdir, reference_location=None):
"""Make a Reconfiguration to convert bzrdir into a lightweight checkout
:param bzrdir: The bzrdir to reconfigure
:param bound_location: The location the checkout should be bound to.
:raise errors.AlreadyLightweightCheckout: if bzrdir is already a
lightweight checkout
"""
reconfiguration = klass(bzrdir, reference_location)
reconfiguration._plan_changes(want_tree=True, want_branch=False,
want_bound=False, want_reference=True)
if not reconfiguration.changes_planned():
raise errors.AlreadyLightweightCheckout(bzrdir)
return reconfiguration
@classmethod
def to_use_shared(klass, bzrdir):
"""Convert a standalone branch into a repository branch"""
reconfiguration = klass(bzrdir)
reconfiguration._set_use_shared(use_shared=True)
if not reconfiguration.changes_planned():
raise errors.AlreadyUsingShared(bzrdir)
return reconfiguration
@classmethod
def to_standalone(klass, bzrdir):
"""Convert a repository branch into a standalone branch"""
reconfiguration = klass(bzrdir)
reconfiguration._set_use_shared(use_shared=False)
if not reconfiguration.changes_planned():
raise errors.AlreadyStandalone(bzrdir)
return reconfiguration
@classmethod
def set_repository_trees(klass, bzrdir, with_trees):
"""Adjust a repository's working tree presence default"""
reconfiguration = klass(bzrdir)
if not reconfiguration.repository.is_shared():
raise errors.ReconfigurationNotSupported(reconfiguration.bzrdir)
if with_trees and reconfiguration.repository.make_working_trees():
raise errors.AlreadyWithTrees(bzrdir)
elif (not with_trees
and not reconfiguration.repository.make_working_trees()):
raise errors.AlreadyWithNoTrees(bzrdir)
else:
reconfiguration._repository_trees = with_trees
return reconfiguration
def _plan_changes(self, want_tree, want_branch, want_bound,
want_reference):
"""Determine which changes are needed to assume the configuration"""
if not want_branch and not want_reference:
raise errors.ReconfigurationNotSupported(self.bzrdir)
if want_branch and want_reference:
raise errors.ReconfigurationNotSupported(self.bzrdir)
if self.repository is None:
if not want_reference:
self._create_repository = True
else:
if want_reference and (self.repository.bzrdir.root_transport.base
== self.bzrdir.root_transport.base):
if not self.repository.is_shared():
self._destroy_repository = True
if self.referenced_branch is None:
if want_reference:
self._create_reference = True
if self.local_branch is not None:
self._destroy_branch = True
else:
if not want_reference:
self._destroy_reference = True
if self.local_branch is None:
if want_branch is True:
self._create_branch = True
if want_bound:
self._bind = True
else:
if want_bound:
if self.local_branch.get_bound_location() is None:
self._bind = True
else:
if self.local_branch.get_bound_location() is not None:
self._unbind = True
if not want_tree and self.tree is not None:
self._destroy_tree = True
if want_tree and self.tree is None:
self._create_tree = True
def _set_use_shared(self, use_shared=None):
if use_shared is None:
return
if use_shared:
if self.local_repository is not None:
self._destroy_repository = True
else:
if self.local_repository is None:
self._create_repository = True
def changes_planned(self):
"""Return True if changes are planned, False otherwise"""
return (self._unbind or self._bind or self._destroy_tree
or self._create_tree or self._destroy_reference
or self._create_branch or self._create_repository
or self._create_reference or self._destroy_repository)
def _check(self):
"""Raise if reconfiguration would destroy local changes"""
if self._destroy_tree:
changes = self.tree.changes_from(self.tree.basis_tree())
if changes.has_changed():
raise errors.UncommittedChanges(self.tree)
if self._create_reference and self.local_branch is not None:
reference_branch = branch.Branch.open(self._select_bind_location())
if (reference_branch.last_revision() !=
self.local_branch.last_revision()):
raise errors.UnsyncedBranches(self.bzrdir, reference_branch)
def _select_bind_location(self):
"""Select a location to bind or create a reference to.
Preference is:
1. user specified location
2. branch reference location (it's a kind of bind location)
3. current bind location
4. previous bind location (it was a good choice once)
5. push location (it's writeable, so committable)
6. parent location (it's pullable, so update-from-able)
"""
if self.new_bound_location is not None:
return self.new_bound_location
if self.local_branch is not None:
bound = self.local_branch.get_bound_location()
if bound is not None:
return bound
old_bound = self.local_branch.get_old_bound_location()
if old_bound is not None:
return old_bound
push_location = self.local_branch.get_push_location()
if push_location is not None:
return push_location
parent = self.local_branch.get_parent()
if parent is not None:
return parent
elif self.referenced_branch is not None:
return self.referenced_branch.base
raise errors.NoBindLocation(self.bzrdir)
def apply(self, force=False):
"""Apply the reconfiguration
:param force: If true, the reconfiguration is applied even if it will
destroy local changes.
:raise errors.UncommittedChanges: if the local tree is to be destroyed
but contains uncommitted changes.
:raise errors.NoBindLocation: if no bind location was specified and
none could be autodetected.
"""
if not force:
self._check()
if self._create_repository:
repo = self.bzrdir.create_repository()
if self.local_branch and not self._destroy_branch:
repo.fetch(self.local_branch.repository,
self.local_branch.last_revision())
else:
repo = self.repository
if self._create_branch and self.referenced_branch is not None:
repo.fetch(self.referenced_branch.repository,
self.referenced_branch.last_revision())
if self._create_reference:
reference_branch = branch.Branch.open(self._select_bind_location())
if self._destroy_repository:
if self._create_reference:
reference_branch.repository.fetch(self.repository)
elif self.local_branch is not None and not self._destroy_branch:
up = self.local_branch.bzrdir.root_transport.clone('..')
up_bzrdir = bzrdir.BzrDir.open_containing_from_transport(up)[0]
new_repo = up_bzrdir.find_repository()
new_repo.fetch(self.repository)
last_revision_info = None
if self._destroy_reference:
last_revision_info = self.referenced_branch.last_revision_info()
self.bzrdir.destroy_branch()
if self._destroy_branch:
last_revision_info = self.local_branch.last_revision_info()
if self._create_reference:
self.local_branch.tags.merge_to(reference_branch.tags)
self.bzrdir.destroy_branch()
if self._create_branch:
local_branch = self.bzrdir.create_branch()
if last_revision_info is not None:
local_branch.set_last_revision_info(*last_revision_info)
if self._destroy_reference:
self.referenced_branch.tags.merge_to(local_branch.tags)
else:
local_branch = self.local_branch
if self._create_reference:
format = branch.BranchReferenceFormat().initialize(self.bzrdir,
reference_branch)
if self._destroy_tree:
self.bzrdir.destroy_workingtree()
if self._create_tree:
self.bzrdir.create_workingtree()
if self._unbind:
self.local_branch.unbind()
if self._bind:
bind_location = self._select_bind_location()
local_branch.bind(branch.Branch.open(bind_location))
if self._destroy_repository:
self.bzrdir.destroy_repository()
if self._repository_trees is not None:
repo.set_make_working_trees(self._repository_trees)
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