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Viewing changes to bzrlib/switch.py

  • Committer: John Arbash Meinel
  • Author(s): Mark Hammond
  • Date: 2008-09-09 17:02:21 UTC
  • mto: This revision was merged to the branch mainline in revision 3697.
  • Revision ID: john@arbash-meinel.com-20080909170221-svim3jw2mrz0amp3
An updated transparent icon for bzr.

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bzrlib/switch.py
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# Copyright (C) 2007, 2009-2012 Canonical Ltd.
 
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# Copyright (C) 2006, 2007 Canonical Ltd.
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#
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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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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from __future__ import absolute_import
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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# Original author: David Allouche
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from bzrlib import (
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    errors,
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    lock,
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    merge,
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    revision
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    )
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from bzrlib.branch import Branch
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from bzrlib.i18n import gettext
 
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from bzrlib import errors, merge, revision
 
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from bzrlib.branch import Branch, BranchFormat, BranchReferenceFormat
 
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from bzrlib.bzrdir import BzrDir
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from bzrlib.trace import note
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31
 
def _run_post_switch_hooks(control_dir, to_branch, force, revision_id):
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    from bzrlib.branch import SwitchHookParams
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    hooks = Branch.hooks['post_switch']
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    if not hooks:
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        return
36
 
    params = SwitchHookParams(control_dir, to_branch, force, revision_id)
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    for hook in hooks:
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        hook(params)
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40
 
def switch(control_dir, to_branch, force=False, quiet=False, revision_id=None,
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           store_uncommitted=False):
 
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def switch(control_dir, to_branch, force=False):
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    """Switch the branch associated with a checkout.
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44
 
    :param control_dir: ControlDir of the checkout to change
 
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    :param control_dir: BzrDir of the checkout to change
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    :param to_branch: branch that the checkout is to reference
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    :param force: skip the check for local commits in a heavy checkout
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    :param revision_id: revision ID to switch to.
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    :param store_uncommitted: If True, store uncommitted changes in the
49
 
        branch.
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    """
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    _check_pending_merges(control_dir, force)
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    try:
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        source_repository = control_dir.open_branch().repository
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    except errors.NotBranchError:
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        source_repository = to_branch.repository
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    if store_uncommitted:
57
 
        with lock.write_locked(control_dir.open_workingtree()) as tree:
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            tree.store_uncommitted()
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    to_branch.lock_read()
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    try:
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        _set_branch_location(control_dir, to_branch, force)
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    finally:
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        to_branch.unlock()
 
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    _set_branch_location(control_dir, to_branch, force)
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    tree = control_dir.open_workingtree()
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    _update(tree, source_repository, quiet, revision_id, store_uncommitted)
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    _run_post_switch_hooks(control_dir, to_branch, force, revision_id)
 
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    _update(tree, source_repository)
 
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def _check_pending_merges(control, force=False):
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    """Check that there are no outstanding pending merges before switching.
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71
 
    :param control: ControlDir of the branch to check
 
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    :param control: BzrDir of the branch to check
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    """
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    try:
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        tree = control.open_workingtree()
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    # XXX: Should the tree be locked for get_parent_ids?
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    existing_pending_merges = tree.get_parent_ids()[1:]
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    if len(existing_pending_merges) > 0:
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        raise errors.BzrCommandError(gettext('Pending merges must be '
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            'committed or reverted before using switch.'))
 
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        raise errors.BzrCommandError('Pending merges must be '
 
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            'committed or reverted before using switch.')
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def _set_branch_location(control, to_branch, force=False):
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    """Set location value of a branch reference.
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    :param control: ControlDir of the checkout to change
 
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    :param control: BzrDir of the checkout to change
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    :param to_branch: branch that the checkout is to reference
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    :param force: skip the check for local commits in a heavy checkout
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    """
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    branch_format = control.find_branch_format()
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    if branch_format.get_reference(control) is not None:
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        # Lightweight checkout: update the branch reference
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        branch_format.set_reference(control, None, to_branch)
 
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        branch_format.set_reference(control, to_branch)
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    else:
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        b = control.open_branch()
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        bound_branch = b.get_bound_location()
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            # synchronise the local branch with the new remote branch
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            # and bind to it
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            possible_transports = []
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            try:
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                if not force and _any_local_commits(b, possible_transports):
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                    raise errors.BzrCommandError(gettext(
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                        'Cannot switch as local commits found in the checkout. '
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                        'Commit these to the bound branch or use --force to '
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                        'throw them away.'))
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            except errors.BoundBranchConnectionFailure, e:
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                raise errors.BzrCommandError(gettext(
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                        'Unable to connect to current master branch %(target)s: '
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                        '%(error)s To switch anyway, use --force.') %
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                        e.__dict__)
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            b.lock_write()
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            try:
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                b.set_bound_location(None)
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                b.pull(to_branch, overwrite=True,
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                       possible_transports=possible_transports)
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                b.set_bound_location(to_branch.base)
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                b.set_parent(b.get_master_branch().get_parent())
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            finally:
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                b.unlock()
 
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            if not force and _any_local_commits(b, possible_transports):
 
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                raise errors.BzrCommandError(
 
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                    'Cannot switch as local commits found in the checkout. '
 
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                    'Commit these to the bound branch or use --force to '
 
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                    'throw them away.')
 
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            b.set_bound_location(None)
 
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            b.pull(to_branch, overwrite=True,
 
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                possible_transports=possible_transports)
 
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            b.set_bound_location(to_branch.base)
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        else:
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            # If this is a standalone tree and the new branch
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            # is derived from this one, create a lightweight checkout.
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            b.lock_read()
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            try:
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                graph = b.repository.get_graph(to_branch.repository)
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                if (b.bzrdir._format.colocated_branches and
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                     (force or graph.is_ancestor(b.last_revision(),
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                        to_branch.last_revision()))):
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                    b.bzrdir.destroy_branch()
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                    b.bzrdir.set_branch_reference(to_branch, name="")
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                else:
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                    raise errors.BzrCommandError(gettext('Cannot switch a branch, '
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                        'only a checkout.'))
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            finally:
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                b.unlock()
 
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            raise errors.BzrCommandError('Cannot switch a branch, '
 
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                'only a checkout.')
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145
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146
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def _any_local_commits(this_branch, possible_transports):
162
112
    return False
163
113
 
164
114
 
165
 
def _update(tree, source_repository, quiet=False, revision_id=None,
166
 
            restore_uncommitted=False):
 
115
def _update(tree, source_repository):
167
116
    """Update a working tree to the latest revision of its branch.
168
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169
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    :param tree: the working tree
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    :param source_repository: repository holding the revisions
171
 
    :param restore_uncommitted: restore any uncommitted changes in the branch.
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120
    """
173
 
    if restore_uncommitted:
174
 
        tree.lock_write()
175
 
    else:
176
 
        tree.lock_tree_write()
 
121
    tree.lock_tree_write()
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122
    try:
178
123
        to_branch = tree.branch
179
 
        if revision_id is None:
180
 
            revision_id = to_branch.last_revision()
181
 
        if tree.last_revision() == revision_id:
182
 
            if not quiet:
183
 
                note(gettext("Tree is up to date at revision %d."), to_branch.revno())
184
 
        else:
185
 
            base_tree = source_repository.revision_tree(tree.last_revision())
186
 
            merge.Merge3Merger(tree, tree, base_tree,
187
 
                               to_branch.repository.revision_tree(revision_id))
188
 
            tree.set_last_revision(to_branch.last_revision())
189
 
            if not quiet:
190
 
                note(gettext('Updated to revision %d.') % to_branch.revno())
191
 
        if restore_uncommitted:
192
 
            tree.restore_uncommitted()
 
124
        if tree.last_revision() == to_branch.last_revision():
 
125
            note("Tree is up to date at revision %d.", to_branch.revno())
 
126
            return
 
127
        base_tree = source_repository.revision_tree(tree.last_revision())
 
128
        merge.Merge3Merger(tree, tree, base_tree, to_branch.basis_tree())
 
129
        tree.set_last_revision(to_branch.last_revision())
 
130
        note('Updated to revision %d.' % to_branch.revno())
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131
    finally:
194
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        tree.unlock()