« back to all changes in this revision
Viewing changes to bzrlib/reconfigure.py
- browse files at revision 2826
- compare with another revision
- download diff
- download tarball
- view history from revision 2826
- Committer: Canonical.com Patch Queue Manager
- Date: 2007-09-17 14:29:23 UTC
- mfrom: (2796.2.18 bzr.reconfigure)
- Revision ID: pqm@pqm.ubuntu.com-20070917142923-f06edfgw1d0cvj4w
Add reconfigure command
- files added:
- bzrlib/reconfigure.py
- files modified:
- NEWS
added
removed
bzrlib/reconfigure.py
1
# Copyright (C) 2007 Canonical Ltd
2
#
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
7
#
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16
17
"""Reconfigure a bzrdir into a new tree/branch/repository layout"""
18
19
from bzrlib import (
20
branch,
21
errors,
22
)
23
24
class Reconfigure(object):
25
26
def __init__(self, bzrdir, new_bound_location=None):
27
self.bzrdir = bzrdir
28
self.new_bound_location = new_bound_location
29
try:
30
self.repository = self.bzrdir.find_repository()
31
except errors.NoRepositoryPresent:
32
self.repository = None
33
try:
34
branch = self.bzrdir.open_branch()
35
if branch.bzrdir.root_transport.base == bzrdir.root_transport.base:
36
self.local_branch = branch
37
self.referenced_branch = None
38
else:
39
self.local_branch = None
40
self.referenced_branch = branch
41
except errors.NotBranchError:
42
self.local_branch = None
43
self.referenced_branch = None
44
try:
45
self.tree = bzrdir.open_workingtree()
46
except errors.NoWorkingTree:
47
self.tree = None
48
self._unbind = False
49
self._bind = False
50
self._destroy_reference = False
51
self._create_branch = False
52
self._destroy_tree = False
53
self._create_tree = False
54
self._create_repository = False
55
56
@staticmethod
57
def to_branch(bzrdir):
58
"""Return a Reconfiguration to convert this bzrdir into a branch
59
60
:param bzrdir: The bzrdir to reconfigure
61
:raise errors.AlreadyBranch: if bzrdir is already a branch
62
:raise errors.ReconfigurationNotSupported: if bzrdir does not contain
63
a branch or branch reference
64
"""
65
reconfiguration = Reconfigure(bzrdir)
66
reconfiguration._plan_changes(want_tree=False, want_branch=True,
67
want_bound=False)
68
if not reconfiguration.changes_planned():
69
raise errors.AlreadyBranch(bzrdir)
70
return reconfiguration
71
72
@staticmethod
73
def to_tree(bzrdir):
74
"""Return a Reconfiguration to convert this bzrdir into a tree
75
76
:param bzrdir: The bzrdir to reconfigure
77
:raise errors.AlreadyTree: if bzrdir is already a tree
78
:raise errors.ReconfigurationNotSupported: if bzrdir does not contain
79
a branch or branch reference
80
"""
81
reconfiguration = Reconfigure(bzrdir)
82
reconfiguration._plan_changes(want_tree=True, want_branch=True,
83
want_bound=False)
84
if not reconfiguration.changes_planned():
85
raise errors.AlreadyTree(bzrdir)
86
return reconfiguration
87
88
@staticmethod
89
def to_checkout(bzrdir, bound_location=None):
90
"""Return a Reconfiguration to convert this bzrdir into a checkout
91
92
:param bzrdir: The bzrdir to reconfigure
93
:param bound_location: The location the checkout should be bound to.
94
:raise errors.AlreadyCheckout: if bzrdir is already a checkout
95
:raise errors.ReconfigurationNotSupported: if bzrdir does not contain
96
a branch or branch reference
97
"""
98
reconfiguration = Reconfigure(bzrdir, bound_location)
99
reconfiguration._plan_changes(want_tree=True, want_branch=True,
100
want_bound=True)
101
if not reconfiguration.changes_planned():
102
raise errors.AlreadyCheckout(bzrdir)
103
return reconfiguration
104
105
def _plan_changes(self, want_tree, want_branch, want_bound):
106
"""Determine which changes are needed to assume the configuration"""
107
if self.repository is None:
108
self._create_repository = True
109
if self.local_branch is None:
110
if want_branch is True:
111
if self.referenced_branch is not None:
112
self._destroy_reference = True
113
self._create_branch = True
114
if want_bound:
115
self._bind = True
116
else:
117
raise errors.ReconfigurationNotSupported(self.bzrdir)
118
else:
119
if want_bound:
120
if self.local_branch.get_bound_location() is None:
121
self._bind = True
122
else:
123
if self.local_branch.get_bound_location() is not None:
124
self._unbind = True
125
if not want_tree and self.tree is not None:
126
self._destroy_tree = True
127
if want_tree and self.tree is None:
128
self._create_tree = True
129
130
def changes_planned(self):
131
"""Return True if changes are planned, False otherwise"""
132
return (self._unbind or self._bind or self._destroy_tree
133
or self._create_tree or self._destroy_reference
134
or self._create_branch or self._create_repository)
135
136
def _check(self):
137
"""Raise if reconfiguration would destroy local changes"""
138
if self._destroy_tree:
139
changes = self.tree.changes_from(self.tree.basis_tree())
140
if changes.has_changed():
141
raise errors.UncommittedChanges(self.tree)
142
143
def _select_bind_location(self):
144
"""Select a location to bind to.
145
146
Preference is:
147
1. user specified location
148
2. branch reference location (it's a kind of bind location)
149
3. previous bind location (it was a good choice once)
150
4. push location (it's writeable, so committable)
151
5. parent location (it's pullable, so update-from-able)
152
"""
153
if self.new_bound_location is not None:
154
return self.new_bound_location
155
if self.local_branch is not None:
156
old_bound = self.local_branch.get_old_bound_location()
157
if old_bound is not None:
158
return old_bound
159
push_location = self.local_branch.get_push_location()
160
if push_location is not None:
161
return push_location
162
parent = self.local_branch.get_parent()
163
if parent is not None:
164
return parent
165
elif self.referenced_branch is not None:
166
return self.referenced_branch.base
167
raise errors.NoBindLocation(self.bzrdir)
168
169
def apply(self, force=False):
170
"""Apply the reconfiguration
171
172
:param force: If true, the reconfiguration is applied even if it will
173
destroy local changes.
174
:raise errors.UncommittedChanges: if the local tree is to be destroyed
175
but contains uncommitted changes.
176
:raise errors.NoBindLocation: if no bind location was specified and
177
none could be autodetected.
178
"""
179
if not force:
180
self._check()
181
if self._create_repository:
182
repo = self.bzrdir.create_repository()
183
else:
184
repo = self.repository
185
if self._create_branch:
186
repo.fetch(self.referenced_branch.repository,
187
self.referenced_branch.last_revision())
188
if self._destroy_reference:
189
reference_info = self.referenced_branch.last_revision_info()
190
self.bzrdir.destroy_branch()
191
if self._create_branch:
192
local_branch = self.bzrdir.create_branch()
193
local_branch.set_last_revision_info(*reference_info)
194
else:
195
local_branch = self.local_branch
196
if self._destroy_tree:
197
self.bzrdir.destroy_workingtree()
198
if self._create_tree:
199
self.bzrdir.create_workingtree()
200
if self._unbind:
201
self.local_branch.unbind()
202
if self._bind:
203
bind_location = self._select_bind_location()
204
local_branch.bind(branch.Branch.open(bind_location))
Loggerhead is a web-based interface for Breezy
Version: 2.0.1