File: //lib/python3/dist-packages/breezy/reconfigure.py
# Copyright (C) 2007-2010 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 controldir into a new tree/branch/repository layout.
Various types of reconfiguration operation are available either by
constructing a class or using a factory method on Reconfigure.
"""
from __future__ import absolute_import
from . import (
branch,
controldir,
errors,
trace,
ui,
urlutils,
)
from .i18n import gettext
# TODO: common base class for all reconfigure operations, making no
# assumptions about what kind of change will be done.
class BzrDirError(errors.BzrError):
def __init__(self, controldir):
display_url = urlutils.unescape_for_display(controldir.user_url,
'ascii')
errors.BzrError.__init__(self, controldir=controldir,
display_url=display_url)
class NoBindLocation(BzrDirError):
_fmt = "No location could be found to bind to at %(display_url)s."
class UnsyncedBranches(BzrDirError):
_fmt = ("'%(display_url)s' is not in sync with %(target_url)s. See"
" brz help sync-for-reconfigure.")
def __init__(self, controldir, target_branch):
errors.BzrError.__init__(self, controldir)
from . import urlutils
self.target_url = urlutils.unescape_for_display(target_branch.base,
'ascii')
class AlreadyBranch(BzrDirError):
_fmt = "'%(display_url)s' is already a branch."
class AlreadyTree(BzrDirError):
_fmt = "'%(display_url)s' is already a tree."
class AlreadyCheckout(BzrDirError):
_fmt = "'%(display_url)s' is already a checkout."
class AlreadyLightweightCheckout(BzrDirError):
_fmt = "'%(display_url)s' is already a lightweight checkout."
class AlreadyUsingShared(BzrDirError):
_fmt = "'%(display_url)s' is already using a shared repository."
class AlreadyStandalone(BzrDirError):
_fmt = "'%(display_url)s' is already standalone."
class AlreadyWithTrees(BzrDirError):
_fmt = ("Shared repository '%(display_url)s' already creates "
"working trees.")
class AlreadyWithNoTrees(BzrDirError):
_fmt = ("Shared repository '%(display_url)s' already doesn't create "
"working trees.")
class ReconfigurationNotSupported(BzrDirError):
_fmt = "Requested reconfiguration of '%(display_url)s' is not supported."
class ReconfigureStackedOn(object):
"""Reconfigures a branch to be stacked on another branch."""
def apply(self, controldir, stacked_on_url):
branch = controldir.open_branch()
# it may be a path relative to the cwd or a url; the branch wants
# a path relative to itself...
on_url = urlutils.relative_url(branch.base,
urlutils.normalize_url(stacked_on_url))
with branch.lock_write():
branch.set_stacked_on_url(on_url)
if not trace.is_quiet():
ui.ui_factory.note(gettext(
"{0} is now stacked on {1}\n").format(
branch.base, branch.get_stacked_on_url()))
class ReconfigureUnstacked(object):
def apply(self, controldir):
branch = controldir.open_branch()
with branch.lock_write():
branch.set_stacked_on_url(None)
if not trace.is_quiet():
ui.ui_factory.note(gettext(
"%s is now not stacked\n")
% (branch.base,))
class Reconfigure(object):
def __init__(self, controldir, new_bound_location=None):
self.controldir = controldir
self.new_bound_location = new_bound_location
self.local_repository = None
try:
self.repository = self.controldir.find_repository()
except errors.NoRepositoryPresent:
self.repository = None
self.local_repository = None
else:
if (self.repository.user_url == self.controldir.user_url):
self.local_repository = self.repository
else:
self.local_repository = None
try:
branch = self.controldir.open_branch()
if branch.user_url == controldir.user_url:
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 = controldir.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(controldir):
"""Return a Reconfiguration to convert this controldir into a branch
:param controldir: The controldir to reconfigure
:raise AlreadyBranch: if controldir is already a branch
"""
reconfiguration = Reconfigure(controldir)
reconfiguration._plan_changes(want_tree=False, want_branch=True,
want_bound=False, want_reference=False)
if not reconfiguration.changes_planned():
raise AlreadyBranch(controldir)
return reconfiguration
@staticmethod
def to_tree(controldir):
"""Return a Reconfiguration to convert this controldir into a tree
:param controldir: The controldir to reconfigure
:raise AlreadyTree: if controldir is already a tree
"""
reconfiguration = Reconfigure(controldir)
reconfiguration._plan_changes(want_tree=True, want_branch=True,
want_bound=False, want_reference=False)
if not reconfiguration.changes_planned():
raise AlreadyTree(controldir)
return reconfiguration
@staticmethod
def to_checkout(controldir, bound_location=None):
"""Return a Reconfiguration to convert this controldir into a checkout
:param controldir: The controldir to reconfigure
:param bound_location: The location the checkout should be bound to.
:raise AlreadyCheckout: if controldir is already a checkout
"""
reconfiguration = Reconfigure(controldir, bound_location)
reconfiguration._plan_changes(want_tree=True, want_branch=True,
want_bound=True, want_reference=False)
if not reconfiguration.changes_planned():
raise AlreadyCheckout(controldir)
return reconfiguration
@classmethod
def to_lightweight_checkout(klass, controldir, reference_location=None):
"""Make a Reconfiguration to convert controldir into a lightweight checkout
:param controldir: The controldir to reconfigure
:param bound_location: The location the checkout should be bound to.
:raise AlreadyLightweightCheckout: if controldir is already a
lightweight checkout
"""
reconfiguration = klass(controldir, reference_location)
reconfiguration._plan_changes(want_tree=True, want_branch=False,
want_bound=False, want_reference=True)
if not reconfiguration.changes_planned():
raise AlreadyLightweightCheckout(controldir)
return reconfiguration
@classmethod
def to_use_shared(klass, controldir):
"""Convert a standalone branch into a repository branch"""
reconfiguration = klass(controldir)
reconfiguration._set_use_shared(use_shared=True)
if not reconfiguration.changes_planned():
raise AlreadyUsingShared(controldir)
return reconfiguration
@classmethod
def to_standalone(klass, controldir):
"""Convert a repository branch into a standalone branch"""
reconfiguration = klass(controldir)
reconfiguration._set_use_shared(use_shared=False)
if not reconfiguration.changes_planned():
raise AlreadyStandalone(controldir)
return reconfiguration
@classmethod
def set_repository_trees(klass, controldir, with_trees):
"""Adjust a repository's working tree presence default"""
reconfiguration = klass(controldir)
if not reconfiguration.repository.is_shared():
raise ReconfigurationNotSupported(reconfiguration.controldir)
if with_trees and reconfiguration.repository.make_working_trees():
raise AlreadyWithTrees(controldir)
elif (not with_trees and
not reconfiguration.repository.make_working_trees()):
raise AlreadyWithNoTrees(controldir)
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 ReconfigurationNotSupported(self.controldir)
if want_branch and want_reference:
raise ReconfigurationNotSupported(self.controldir)
if self.repository is None:
if not want_reference:
self._create_repository = True
else:
if want_reference and (
self.repository.user_url == self.controldir.user_url):
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 and self.tree.has_changes():
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 UnsyncedBranches(self.controldir, 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 NoBindLocation(self.controldir)
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 NoBindLocation: if no bind location was specified and
none could be autodetected.
"""
if not force:
self._check()
if self._create_repository:
if self.local_branch and not self._destroy_branch:
old_repo = self.local_branch.repository
elif self._create_branch and self.referenced_branch is not None:
old_repo = self.referenced_branch.repository
else:
old_repo = None
if old_repo is not None:
repository_format = old_repo._format
else:
repository_format = None
if repository_format is not None:
repo = repository_format.initialize(self.controldir)
else:
repo = self.controldir.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.user_transport.clone('..')
up_controldir = controldir.ControlDir.open_containing_from_transport(
up)[0]
new_repo = up_controldir.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.controldir.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.controldir.destroy_branch()
if self._create_branch:
local_branch = self.controldir.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)
self.referenced_branch.update_references(local_branch)
else:
local_branch = self.local_branch
if self._create_reference:
self.controldir.set_branch_reference(reference_branch)
if self._destroy_tree:
self.controldir.destroy_workingtree()
if self._create_tree:
self.controldir.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.controldir.destroy_repository()
if self._repository_trees is not None:
repo.set_make_working_trees(self._repository_trees)