/usr/share/pyshared/bzrlib/switch.py is in python-bzrlib 2.6.0~bzr6526-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | # Copyright (C) 2007, 2009-2012 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
from __future__ import absolute_import
# Original author: David Allouche
from bzrlib import errors, merge, revision
from bzrlib.branch import Branch
from bzrlib.i18n import gettext
from bzrlib.trace import note
def _run_post_switch_hooks(control_dir, to_branch, force, revision_id):
from bzrlib.branch import SwitchHookParams
hooks = Branch.hooks['post_switch']
if not hooks:
return
params = SwitchHookParams(control_dir, to_branch, force, revision_id)
for hook in hooks:
hook(params)
def switch(control_dir, to_branch, force=False, quiet=False, revision_id=None):
"""Switch the branch associated with a checkout.
:param control_dir: ControlDir of the checkout to change
:param to_branch: branch that the checkout is to reference
:param force: skip the check for local commits in a heavy checkout
:param revision_id: revision ID to switch to.
"""
_check_pending_merges(control_dir, force)
try:
source_repository = control_dir.open_branch().repository
except errors.NotBranchError:
source_repository = to_branch.repository
to_branch.lock_read()
try:
_set_branch_location(control_dir, to_branch, force)
finally:
to_branch.unlock()
tree = control_dir.open_workingtree()
_update(tree, source_repository, quiet, revision_id)
_run_post_switch_hooks(control_dir, to_branch, force, revision_id)
def _check_pending_merges(control, force=False):
"""Check that there are no outstanding pending merges before switching.
:param control: ControlDir of the branch to check
"""
try:
tree = control.open_workingtree()
except errors.NotBranchError, ex:
# Lightweight checkout and branch is no longer there
if force:
return
else:
raise ex
# XXX: Should the tree be locked for get_parent_ids?
existing_pending_merges = tree.get_parent_ids()[1:]
if len(existing_pending_merges) > 0:
raise errors.BzrCommandError(gettext('Pending merges must be '
'committed or reverted before using switch.'))
def _set_branch_location(control, to_branch, force=False):
"""Set location value of a branch reference.
:param control: ControlDir of the checkout to change
:param to_branch: branch that the checkout is to reference
:param force: skip the check for local commits in a heavy checkout
"""
branch_format = control.find_branch_format()
if branch_format.get_reference(control) is not None:
# Lightweight checkout: update the branch reference
branch_format.set_reference(control, None, to_branch)
else:
b = control.open_branch()
bound_branch = b.get_bound_location()
if bound_branch is not None:
# Heavyweight checkout: check all local commits
# have been pushed to the current bound branch then
# synchronise the local branch with the new remote branch
# and bind to it
possible_transports = []
try:
if not force and _any_local_commits(b, possible_transports):
raise errors.BzrCommandError(gettext(
'Cannot switch as local commits found in the checkout. '
'Commit these to the bound branch or use --force to '
'throw them away.'))
except errors.BoundBranchConnectionFailure, e:
raise errors.BzrCommandError(gettext(
'Unable to connect to current master branch %(target)s: '
'%(error)s To switch anyway, use --force.') %
e.__dict__)
b.lock_write()
try:
b.set_bound_location(None)
b.pull(to_branch, overwrite=True,
possible_transports=possible_transports)
b.set_bound_location(to_branch.base)
b.set_parent(b.get_master_branch().get_parent())
finally:
b.unlock()
else:
# If this is a standalone tree and the new branch
# is derived from this one, create a lightweight checkout.
b.lock_read()
try:
graph = b.repository.get_graph(to_branch.repository)
if (b.bzrdir._format.colocated_branches and
(force or graph.is_ancestor(b.last_revision(),
to_branch.last_revision()))):
b.bzrdir.destroy_branch()
b.bzrdir.set_branch_reference(to_branch, name="")
else:
raise errors.BzrCommandError(gettext('Cannot switch a branch, '
'only a checkout.'))
finally:
b.unlock()
def _any_local_commits(this_branch, possible_transports):
"""Does this branch have any commits not in the master branch?"""
last_rev = revision.ensure_null(this_branch.last_revision())
if last_rev != revision.NULL_REVISION:
other_branch = this_branch.get_master_branch(possible_transports)
this_branch.lock_read()
other_branch.lock_read()
try:
other_last_rev = other_branch.last_revision()
graph = this_branch.repository.get_graph(
other_branch.repository)
if not graph.is_ancestor(last_rev, other_last_rev):
return True
finally:
other_branch.unlock()
this_branch.unlock()
return False
def _update(tree, source_repository, quiet=False, revision_id=None):
"""Update a working tree to the latest revision of its branch.
:param tree: the working tree
:param source_repository: repository holding the revisions
"""
tree.lock_tree_write()
try:
to_branch = tree.branch
if revision_id is None:
revision_id = to_branch.last_revision()
if tree.last_revision() == revision_id:
if not quiet:
note(gettext("Tree is up to date at revision %d."), to_branch.revno())
return
base_tree = source_repository.revision_tree(tree.last_revision())
merge.Merge3Merger(tree, tree, base_tree, to_branch.repository.revision_tree(revision_id))
tree.set_last_revision(to_branch.last_revision())
if not quiet:
note(gettext('Updated to revision %d.') % to_branch.revno())
finally:
tree.unlock()
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