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  • Committer: Martin
  • Date: 2018-11-16 19:10:17 UTC
  • mto: This revision was merged to the branch mainline in revision 7177.
  • Revision ID: gzlist@googlemail.com-20181116191017-kyedz1qck0ovon3h
Remove lazy_regexp reset in bt.test_source

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breezy/switch.py
 
1
# Copyright (C) 2007, 2009-2012 Canonical Ltd.
 
2
#
 
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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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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
11
# GNU General Public License for more details.
 
12
#
 
13
# You should have received a copy of the GNU General Public License
 
14
# along with this program; if not, write to the Free Software
 
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
16
 
 
17
from __future__ import absolute_import
 
18
 
 
19
# Original author: David Allouche
 
20
 
 
21
from . import (
 
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    errors,
 
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    lock,
 
24
    merge,
 
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    revision
 
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    )
 
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from .branch import Branch
 
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from .i18n import gettext
 
29
from .trace import note
 
30
 
 
31
 
 
32
def _run_post_switch_hooks(control_dir, to_branch, force, revision_id):
 
33
    from .branch import SwitchHookParams
 
34
    hooks = Branch.hooks['post_switch']
 
35
    if not hooks:
 
36
        return
 
37
    params = SwitchHookParams(control_dir, to_branch, force, revision_id)
 
38
    for hook in hooks:
 
39
        hook(params)
 
40
 
 
41
 
 
42
def switch(control_dir, to_branch, force=False, quiet=False, revision_id=None,
 
43
           store_uncommitted=False):
 
44
    """Switch the branch associated with a checkout.
 
45
 
 
46
    :param control_dir: ControlDir of the checkout to change
 
47
    :param to_branch: branch that the checkout is to reference
 
48
    :param force: skip the check for local commits in a heavy checkout
 
49
    :param revision_id: revision ID to switch to.
 
50
    :param store_uncommitted: If True, store uncommitted changes in the
 
51
        branch.
 
52
    """
 
53
    _check_pending_merges(control_dir, force)
 
54
    try:
 
55
        source_repository = control_dir.open_branch().repository
 
56
    except errors.NotBranchError:
 
57
        source_repository = to_branch.repository
 
58
    if store_uncommitted:
 
59
        with lock.write_locked(control_dir.open_workingtree()) as tree:
 
60
            tree.store_uncommitted()
 
61
    with to_branch.lock_read():
 
62
        _set_branch_location(control_dir, to_branch, force)
 
63
    tree = control_dir.open_workingtree()
 
64
    _update(tree, source_repository, quiet, revision_id, store_uncommitted)
 
65
    _run_post_switch_hooks(control_dir, to_branch, force, revision_id)
 
66
 
 
67
 
 
68
def _check_pending_merges(control, force=False):
 
69
    """Check that there are no outstanding pending merges before switching.
 
70
 
 
71
    :param control: ControlDir of the branch to check
 
72
    """
 
73
    try:
 
74
        tree = control.open_workingtree()
 
75
    except errors.NotBranchError as ex:
 
76
        # Lightweight checkout and branch is no longer there
 
77
        if force:
 
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            return
 
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        else:
 
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            raise ex
 
81
    # XXX: Should the tree be locked for get_parent_ids?
 
82
    existing_pending_merges = tree.get_parent_ids()[1:]
 
83
    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.'))
 
86
 
 
87
 
 
88
def _set_branch_location(control, to_branch, force=False):
 
89
    """Set location value of a branch reference.
 
90
 
 
91
    :param control: ControlDir of the checkout to change
 
92
    :param to_branch: branch that the checkout is to reference
 
93
    :param force: skip the check for local commits in a heavy checkout
 
94
    """
 
95
    branch_format = control.find_branch_format()
 
96
    if branch_format.get_reference(control) is not None:
 
97
        # Lightweight checkout: update the branch reference
 
98
        branch_format.set_reference(control, None, to_branch)
 
99
    else:
 
100
        b = control.open_branch()
 
101
        bound_branch = b.get_bound_location()
 
102
        if bound_branch is not None:
 
103
            # Heavyweight checkout: check all local commits
 
104
            # have been pushed to the current bound branch then
 
105
            # synchronise the local branch with the new remote branch
 
106
            # and bind to it
 
107
            possible_transports = []
 
108
            try:
 
109
                if not force and _any_local_commits(b, possible_transports):
 
110
                    raise errors.BzrCommandError(gettext(
 
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                        'Cannot switch as local commits found in the checkout. '
 
112
                        'Commit these to the bound branch or use --force to '
 
113
                        'throw them away.'))
 
114
            except errors.BoundBranchConnectionFailure as e:
 
115
                raise errors.BzrCommandError(gettext(
 
116
                    'Unable to connect to current master branch %(target)s: '
 
117
                    '%(error)s To switch anyway, use --force.') %
 
118
                    e.__dict__)
 
119
            b.lock_write()
 
120
            try:
 
121
                b.set_bound_location(None)
 
122
                b.pull(to_branch, overwrite=True,
 
123
                       possible_transports=possible_transports)
 
124
                b.set_bound_location(to_branch.base)
 
125
                b.set_parent(b.get_master_branch().get_parent())
 
126
            finally:
 
127
                b.unlock()
 
128
        else:
 
129
            # If this is a standalone tree and the new branch
 
130
            # is derived from this one, create a lightweight checkout.
 
131
            with b.lock_read():
 
132
                graph = b.repository.get_graph(to_branch.repository)
 
133
                if (b.controldir._format.colocated_branches and
 
134
                    (force or graph.is_ancestor(
 
135
                        b.last_revision(), to_branch.last_revision()))):
 
136
                    b.controldir.destroy_branch()
 
137
                    b.controldir.set_branch_reference(to_branch, name="")
 
138
                else:
 
139
                    raise errors.BzrCommandError(
 
140
                        gettext('Cannot switch a branch, only a checkout.'))
 
141
 
 
142
 
 
143
def _any_local_commits(this_branch, possible_transports):
 
144
    """Does this branch have any commits not in the master branch?"""
 
145
    last_rev = revision.ensure_null(this_branch.last_revision())
 
146
    if last_rev != revision.NULL_REVISION:
 
147
        other_branch = this_branch.get_master_branch(possible_transports)
 
148
        with this_branch.lock_read(), other_branch.lock_read():
 
149
            other_last_rev = other_branch.last_revision()
 
150
            graph = this_branch.repository.get_graph(
 
151
                other_branch.repository)
 
152
            if not graph.is_ancestor(last_rev, other_last_rev):
 
153
                return True
 
154
    return False
 
155
 
 
156
 
 
157
def _update(tree, source_repository, quiet=False, revision_id=None,
 
158
            restore_uncommitted=False):
 
159
    """Update a working tree to the latest revision of its branch.
 
160
 
 
161
    :param tree: the working tree
 
162
    :param source_repository: repository holding the revisions
 
163
    :param restore_uncommitted: restore any uncommitted changes in the branch.
 
164
    """
 
165
    if restore_uncommitted:
 
166
        tree.lock_write()
 
167
    else:
 
168
        tree.lock_tree_write()
 
169
    try:
 
170
        to_branch = tree.branch
 
171
        if revision_id is None:
 
172
            revision_id = to_branch.last_revision()
 
173
        if tree.last_revision() == revision_id:
 
174
            if not quiet:
 
175
                note(gettext("Tree is up to date at revision %d."),
 
176
                     to_branch.revno())
 
177
        else:
 
178
            base_tree = source_repository.revision_tree(tree.last_revision())
 
179
            merge.Merge3Merger(tree, tree, base_tree,
 
180
                               to_branch.repository.revision_tree(revision_id))
 
181
            tree.set_last_revision(to_branch.last_revision())
 
182
            if not quiet:
 
183
                note(gettext('Updated to revision %d.') % to_branch.revno())
 
184
        if restore_uncommitted:
 
185
            tree.restore_uncommitted()
 
186
    finally:
 
187
        tree.unlock()