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  • Committer: Jelmer Vernooij
  • Date: 2019-01-01 21:08:01 UTC
  • mto: This revision was merged to the branch mainline in revision 7231.
  • Revision ID: jelmer@jelmer.uk-20190101210801-2dlsv7b1lvydmpkl
Fix tests.

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breezy/switch.py
 
1
# Copyright (C) 2007, 2009-2012 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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# 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,
 
25
    revision
 
26
    )
 
27
from .branch import Branch
 
28
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
    try:
 
54
        tree = control_dir.open_workingtree()
 
55
    except errors.NotBranchError as ex:
 
56
        # Lightweight checkout and branch is no longer there
 
57
        if not force or store_uncommitted:
 
58
            raise ex
 
59
        else:
 
60
            tree = None
 
61
    else:
 
62
        if store_uncommitted or tree.branch.get_bound_location():
 
63
            tree.lock_write()
 
64
        else:
 
65
            tree.lock_tree_write()
 
66
    try:
 
67
        if tree is not None:
 
68
            parent_ids = tree.get_parent_ids()
 
69
            if len(parent_ids) > 1:
 
70
                raise errors.BzrCommandError(
 
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                    gettext('Pending merges must be '
 
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                            'committed or reverted before using switch.'))
 
73
 
 
74
        if store_uncommitted:
 
75
            tree.store_uncommitted()
 
76
        if tree is None:
 
77
            source_repository = to_branch.repository
 
78
            base_revision_id = None
 
79
        else:
 
80
            source_repository = tree.branch.repository
 
81
            # Attempt to retrieve the base_revision_id now, since some
 
82
            # working tree formats (i.e. git) don't have their own
 
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            # last_revision but just use that of the currently active branch.
 
84
            base_revision_id = tree.last_revision()
 
85
    finally:
 
86
        if tree is not None:
 
87
            tree.unlock()
 
88
    with to_branch.lock_read():
 
89
        _set_branch_location(control_dir, to_branch, tree.branch if tree else None, force)
 
90
    tree = control_dir.open_workingtree()
 
91
    if store_uncommitted:
 
92
        tree.lock_write()
 
93
    else:
 
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        tree.lock_tree_write()
 
95
    try:
 
96
        if base_revision_id is None:
 
97
            # If we couldn't get to the tree's last_revision earlier, perhaps
 
98
            # we can now.
 
99
            base_revision_id = tree.last_revision()
 
100
        if revision_id is None:
 
101
            revision_id = to_branch.last_revision()
 
102
        if base_revision_id == revision_id:
 
103
            if not quiet:
 
104
                note(gettext("Tree is up to date at revision %d."),
 
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                     to_branch.revno())
 
106
        else:
 
107
            base_tree = source_repository.revision_tree(base_revision_id)
 
108
            target_tree = to_branch.repository.revision_tree(revision_id)
 
109
            merge.Merge3Merger(tree, tree, base_tree, target_tree)
 
110
            tree.set_last_revision(revision_id)
 
111
            if not quiet:
 
112
                note(gettext('Updated to revision %d.') % to_branch.revno())
 
113
        if store_uncommitted:
 
114
            tree.restore_uncommitted()
 
115
        _run_post_switch_hooks(control_dir, to_branch, force, revision_id)
 
116
    finally:
 
117
        tree.unlock()
 
118
 
 
119
 
 
120
def _set_branch_location(control, to_branch, current_branch, force=False):
 
121
    """Set location value of a branch reference.
 
122
 
 
123
    :param control: ControlDir of the checkout to change
 
124
    :param to_branch: branch that the checkout is to reference
 
125
    :param force: skip the check for local commits in a heavy checkout
 
126
    """
 
127
    branch_format = control.find_branch_format()
 
128
    if branch_format.get_reference(control) is not None:
 
129
        # Lightweight checkout: update the branch reference
 
130
        branch_format.set_reference(control, None, to_branch)
 
131
    else:
 
132
        b = current_branch
 
133
        bound_branch = b.get_bound_location()
 
134
        if bound_branch is not None:
 
135
            # Heavyweight checkout: check all local commits
 
136
            # have been pushed to the current bound branch then
 
137
            # synchronise the local branch with the new remote branch
 
138
            # and bind to it
 
139
            possible_transports = []
 
140
            try:
 
141
                if not force and _any_local_commits(b, possible_transports):
 
142
                    raise errors.BzrCommandError(gettext(
 
143
                        'Cannot switch as local commits found in the checkout. '
 
144
                        'Commit these to the bound branch or use --force to '
 
145
                        'throw them away.'))
 
146
            except errors.BoundBranchConnectionFailure as e:
 
147
                raise errors.BzrCommandError(gettext(
 
148
                    'Unable to connect to current master branch %(target)s: '
 
149
                    '%(error)s To switch anyway, use --force.') %
 
150
                    e.__dict__)
 
151
            b.lock_write()
 
152
            try:
 
153
                b.set_bound_location(None)
 
154
                b.pull(to_branch, overwrite=True,
 
155
                       possible_transports=possible_transports)
 
156
                b.set_bound_location(to_branch.base)
 
157
                b.set_parent(b.get_master_branch().get_parent())
 
158
            finally:
 
159
                b.unlock()
 
160
        else:
 
161
            # If this is a standalone tree and the new branch
 
162
            # is derived from this one, create a lightweight checkout.
 
163
            with b.lock_read():
 
164
                graph = b.repository.get_graph(to_branch.repository)
 
165
                if (b.controldir._format.colocated_branches and
 
166
                    (force or graph.is_ancestor(
 
167
                        b.last_revision(), to_branch.last_revision()))):
 
168
                    b.controldir.destroy_branch()
 
169
                    b.controldir.set_branch_reference(to_branch, name="")
 
170
                else:
 
171
                    raise errors.BzrCommandError(
 
172
                        gettext('Cannot switch a branch, only a checkout.'))
 
173
 
 
174
 
 
175
def _any_local_commits(this_branch, possible_transports):
 
176
    """Does this branch have any commits not in the master branch?"""
 
177
    last_rev = revision.ensure_null(this_branch.last_revision())
 
178
    if last_rev != revision.NULL_REVISION:
 
179
        other_branch = this_branch.get_master_branch(possible_transports)
 
180
        with this_branch.lock_read(), other_branch.lock_read():
 
181
            other_last_rev = other_branch.last_revision()
 
182
            graph = this_branch.repository.get_graph(
 
183
                other_branch.repository)
 
184
            if not graph.is_ancestor(last_rev, other_last_rev):
 
185
                return True
 
186
    return False