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Viewing changes to bzrlib/reconfigure.py

  • Committer: John Arbash Meinel
  • Date: 2007-11-16 23:53:17 UTC
  • mto: This revision was merged to the branch mainline in revision 3027.
  • Revision ID: john@arbash-meinel.com-20071116235317-uymqhilped1rloqy
Implement LRUCache.get() which acts like dict.get()
so that we can return a default if the key isn't present.

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bzrlib/reconfigure.py
1
 
# Copyright (C) 2007-2010 Canonical Ltd
 
1
# Copyright (C) 2007 Canonical Ltd
2
2
#
3
3
# This program is free software; you can redistribute it and/or modify
4
4
# it under the terms of the GNU General Public License as published by
12
12
#
13
13
# You should have received a copy of the GNU General Public License
14
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
 
"""Reconfigure a bzrdir into a new tree/branch/repository layout.
18
 
 
19
 
Various types of reconfiguration operation are available either by
20
 
constructing a class or using a factory method on Reconfigure.
21
 
"""
22
 
 
 
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"""
23
18
 
24
19
from bzrlib import (
25
20
    branch,
26
 
    bzrdir,
27
21
    errors,
28
 
    trace,
29
 
    ui,
30
 
    urlutils,
31
22
    )
32
23
 
33
 
 
34
 
# TODO: common base class for all reconfigure operations, making no
35
 
# assumptions about what kind of change will be done.
36
 
 
37
 
 
38
 
class ReconfigureStackedOn(object):
39
 
    """Reconfigures a branch to be stacked on another branch."""
40
 
 
41
 
    def apply(self, bzrdir, stacked_on_url):
42
 
        branch = bzrdir.open_branch()
43
 
        # it may be a path relative to the cwd or a url; the branch wants
44
 
        # a path relative to itself...
45
 
        on_url = urlutils.relative_url(branch.base,
46
 
            urlutils.normalize_url(stacked_on_url))
47
 
        branch.lock_write()
48
 
        try:
49
 
            branch.set_stacked_on_url(on_url)
50
 
            if not trace.is_quiet():
51
 
                ui.ui_factory.note(
52
 
                    "%s is now stacked on %s\n"
53
 
                    % (branch.base, branch.get_stacked_on_url()))
54
 
        finally:
55
 
            branch.unlock()
56
 
 
57
 
 
58
 
class ReconfigureUnstacked(object):
59
 
 
60
 
    def apply(self, bzrdir):
61
 
        branch = bzrdir.open_branch()
62
 
        branch.lock_write()
63
 
        try:
64
 
            branch.set_stacked_on_url(None)
65
 
            if not trace.is_quiet():
66
 
                ui.ui_factory.note(
67
 
                    "%s is now not stacked\n"
68
 
                    % (branch.base,))
69
 
        finally:
70
 
            branch.unlock()
71
 
 
72
 
 
73
24
class Reconfigure(object):
74
25
 
75
26
    def __init__(self, bzrdir, new_bound_location=None):
76
27
        self.bzrdir = bzrdir
77
28
        self.new_bound_location = new_bound_location
78
 
        self.local_repository = None
79
29
        try:
80
30
            self.repository = self.bzrdir.find_repository()
81
31
        except errors.NoRepositoryPresent:
82
32
            self.repository = None
83
 
            self.local_repository = None
84
 
        else:
85
 
            if (self.repository.user_url == self.bzrdir.user_url):
86
 
                self.local_repository = self.repository
87
 
            else:
88
 
                self.local_repository = None
89
33
        try:
90
34
            branch = self.bzrdir.open_branch()
91
 
            if branch.user_url == bzrdir.user_url:
 
35
            if branch.bzrdir.root_transport.base == bzrdir.root_transport.base:
92
36
                self.local_branch = branch
93
37
                self.referenced_branch = None
94
38
            else:
104
48
        self._unbind = False
105
49
        self._bind = False
106
50
        self._destroy_reference = False
107
 
        self._create_reference = False
108
 
        self._destroy_branch = False
109
51
        self._create_branch = False
110
52
        self._destroy_tree = False
111
53
        self._create_tree = False
112
54
        self._create_repository = False
113
 
        self._destroy_repository = False
114
 
        self._repository_trees = None
115
55
 
116
56
    @staticmethod
117
57
    def to_branch(bzrdir):
119
59
 
120
60
        :param bzrdir: The bzrdir to reconfigure
121
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
122
64
        """
123
65
        reconfiguration = Reconfigure(bzrdir)
124
66
        reconfiguration._plan_changes(want_tree=False, want_branch=True,
125
 
                                      want_bound=False, want_reference=False)
 
67
                                      want_bound=False)
126
68
        if not reconfiguration.changes_planned():
127
69
            raise errors.AlreadyBranch(bzrdir)
128
70
        return reconfiguration
133
75
 
134
76
        :param bzrdir: The bzrdir to reconfigure
135
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
136
80
        """
137
81
        reconfiguration = Reconfigure(bzrdir)
138
82
        reconfiguration._plan_changes(want_tree=True, want_branch=True,
139
 
                                      want_bound=False, want_reference=False)
 
83
                                      want_bound=False)
140
84
        if not reconfiguration.changes_planned():
141
85
            raise errors.AlreadyTree(bzrdir)
142
86
        return reconfiguration
148
92
        :param bzrdir: The bzrdir to reconfigure
149
93
        :param bound_location: The location the checkout should be bound to.
150
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
151
97
        """
152
98
        reconfiguration = Reconfigure(bzrdir, bound_location)
153
99
        reconfiguration._plan_changes(want_tree=True, want_branch=True,
154
 
                                      want_bound=True, want_reference=False)
 
100
                                      want_bound=True)
155
101
        if not reconfiguration.changes_planned():
156
102
            raise errors.AlreadyCheckout(bzrdir)
157
103
        return reconfiguration
158
104
 
159
 
    @classmethod
160
 
    def to_lightweight_checkout(klass, bzrdir, reference_location=None):
161
 
        """Make a Reconfiguration to convert bzrdir into a lightweight checkout
162
 
 
163
 
        :param bzrdir: The bzrdir to reconfigure
164
 
        :param bound_location: The location the checkout should be bound to.
165
 
        :raise errors.AlreadyLightweightCheckout: if bzrdir is already a
166
 
            lightweight checkout
167
 
        """
168
 
        reconfiguration = klass(bzrdir, reference_location)
169
 
        reconfiguration._plan_changes(want_tree=True, want_branch=False,
170
 
                                      want_bound=False, want_reference=True)
171
 
        if not reconfiguration.changes_planned():
172
 
            raise errors.AlreadyLightweightCheckout(bzrdir)
173
 
        return reconfiguration
174
 
 
175
 
    @classmethod
176
 
    def to_use_shared(klass, bzrdir):
177
 
        """Convert a standalone branch into a repository branch"""
178
 
        reconfiguration = klass(bzrdir)
179
 
        reconfiguration._set_use_shared(use_shared=True)
180
 
        if not reconfiguration.changes_planned():
181
 
            raise errors.AlreadyUsingShared(bzrdir)
182
 
        return reconfiguration
183
 
 
184
 
    @classmethod
185
 
    def to_standalone(klass, bzrdir):
186
 
        """Convert a repository branch into a standalone branch"""
187
 
        reconfiguration = klass(bzrdir)
188
 
        reconfiguration._set_use_shared(use_shared=False)
189
 
        if not reconfiguration.changes_planned():
190
 
            raise errors.AlreadyStandalone(bzrdir)
191
 
        return reconfiguration
192
 
 
193
 
    @classmethod
194
 
    def set_repository_trees(klass, bzrdir, with_trees):
195
 
        """Adjust a repository's working tree presence default"""
196
 
        reconfiguration = klass(bzrdir)
197
 
        if not reconfiguration.repository.is_shared():
198
 
            raise errors.ReconfigurationNotSupported(reconfiguration.bzrdir)
199
 
        if with_trees and reconfiguration.repository.make_working_trees():
200
 
            raise errors.AlreadyWithTrees(bzrdir)
201
 
        elif (not with_trees
202
 
              and not reconfiguration.repository.make_working_trees()):
203
 
            raise errors.AlreadyWithNoTrees(bzrdir)
204
 
        else:
205
 
            reconfiguration._repository_trees = with_trees
206
 
        return reconfiguration
207
 
 
208
 
    def _plan_changes(self, want_tree, want_branch, want_bound,
209
 
                      want_reference):
 
105
    def _plan_changes(self, want_tree, want_branch, want_bound):
210
106
        """Determine which changes are needed to assume the configuration"""
211
 
        if not want_branch and not want_reference:
212
 
            raise errors.ReconfigurationNotSupported(self.bzrdir)
213
 
        if want_branch and want_reference:
214
 
            raise errors.ReconfigurationNotSupported(self.bzrdir)
215
107
        if self.repository is None:
216
 
            if not want_reference:
217
 
                self._create_repository = True
218
 
        else:
219
 
            if want_reference and (
220
 
                self.repository.user_url == self.bzrdir.user_url):
221
 
                if not self.repository.is_shared():
222
 
                    self._destroy_repository = True
223
 
        if self.referenced_branch is None:
224
 
            if want_reference:
225
 
                self._create_reference = True
226
 
                if self.local_branch is not None:
227
 
                    self._destroy_branch = True
228
 
        else:
229
 
            if not want_reference:
230
 
                self._destroy_reference = True
 
108
            self._create_repository = True
231
109
        if self.local_branch is None:
232
110
            if want_branch is True:
233
 
                self._create_branch = True
234
 
                if want_bound:
235
 
                    self._bind = 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)
236
118
        else:
237
119
            if want_bound:
238
120
                if self.local_branch.get_bound_location() is None:
245
127
        if want_tree and self.tree is None:
246
128
            self._create_tree = True
247
129
 
248
 
    def _set_use_shared(self, use_shared=None):
249
 
        if use_shared is None:
250
 
            return
251
 
        if use_shared:
252
 
            if self.local_repository is not None:
253
 
                self._destroy_repository = True
254
 
        else:
255
 
            if self.local_repository is None:
256
 
                self._create_repository = True
257
 
 
258
130
    def changes_planned(self):
259
131
        """Return True if changes are planned, False otherwise"""
260
132
        return (self._unbind or self._bind or self._destroy_tree
261
133
                or self._create_tree or self._destroy_reference
262
 
                or self._create_branch or self._create_repository
263
 
                or self._create_reference or self._destroy_repository)
 
134
                or self._create_branch or self._create_repository)
264
135
 
265
136
    def _check(self):
266
137
        """Raise if reconfiguration would destroy local changes"""
267
 
        if self._destroy_tree and self.tree.has_changes():
 
138
        if self._destroy_tree:
 
139
            changes = self.tree.changes_from(self.tree.basis_tree())
 
140
            if changes.has_changed():
268
141
                raise errors.UncommittedChanges(self.tree)
269
 
        if self._create_reference and self.local_branch is not None:
270
 
            reference_branch = branch.Branch.open(self._select_bind_location())
271
 
            if (reference_branch.last_revision() !=
272
 
                self.local_branch.last_revision()):
273
 
                raise errors.UnsyncedBranches(self.bzrdir, reference_branch)
274
142
 
275
143
    def _select_bind_location(self):
276
 
        """Select a location to bind or create a reference to.
 
144
        """Select a location to bind to.
277
145
 
278
146
        Preference is:
279
147
        1. user specified location
280
148
        2. branch reference location (it's a kind of bind location)
281
 
        3. current bind location
282
 
        4. previous bind location (it was a good choice once)
283
 
        5. push location (it's writeable, so committable)
284
 
        6. parent location (it's pullable, so update-from-able)
 
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)
285
152
        """
286
153
        if self.new_bound_location is not None:
287
154
            return self.new_bound_location
288
155
        if self.local_branch is not None:
289
 
            bound = self.local_branch.get_bound_location()
290
 
            if bound is not None:
291
 
                return bound
292
156
            old_bound = self.local_branch.get_old_bound_location()
293
157
            if old_bound is not None:
294
158
                return old_bound
315
179
        if not force:
316
180
            self._check()
317
181
        if self._create_repository:
318
 
            if self.local_branch and not self._destroy_branch:
319
 
                old_repo = self.local_branch.repository
320
 
            elif self._create_branch and self.referenced_branch is not None:
321
 
                old_repo = self.referenced_branch.repository
322
 
            else:
323
 
                old_repo = None
324
 
            if old_repo is not None:
325
 
                repository_format = old_repo._format
326
 
            else:
327
 
                repository_format = None
328
 
            if repository_format is not None:
329
 
                repo = repository_format.initialize(self.bzrdir)
330
 
            else:
331
 
                repo = self.bzrdir.create_repository()
332
 
            if self.local_branch and not self._destroy_branch:
333
 
                repo.fetch(self.local_branch.repository,
334
 
                           self.local_branch.last_revision())
 
182
            repo = self.bzrdir.create_repository()
335
183
        else:
336
184
            repo = self.repository
337
 
        if self._create_branch and self.referenced_branch is not None:
 
185
        if self._create_branch:
338
186
            repo.fetch(self.referenced_branch.repository,
339
187
                       self.referenced_branch.last_revision())
340
 
        if self._create_reference:
341
 
            reference_branch = branch.Branch.open(self._select_bind_location())
342
 
        if self._destroy_repository:
343
 
            if self._create_reference:
344
 
                reference_branch.repository.fetch(self.repository)
345
 
            elif self.local_branch is not None and not self._destroy_branch:
346
 
                up = self.local_branch.user_transport.clone('..')
347
 
                up_bzrdir = bzrdir.BzrDir.open_containing_from_transport(up)[0]
348
 
                new_repo = up_bzrdir.find_repository()
349
 
                new_repo.fetch(self.repository)
350
 
        last_revision_info = None
351
188
        if self._destroy_reference:
352
 
            last_revision_info = self.referenced_branch.last_revision_info()
353
 
            self.bzrdir.destroy_branch()
354
 
        if self._destroy_branch:
355
 
            last_revision_info = self.local_branch.last_revision_info()
356
 
            if self._create_reference:
357
 
                self.local_branch.tags.merge_to(reference_branch.tags)
 
189
            reference_info = self.referenced_branch.last_revision_info()
358
190
            self.bzrdir.destroy_branch()
359
191
        if self._create_branch:
360
192
            local_branch = self.bzrdir.create_branch()
361
 
            if last_revision_info is not None:
362
 
                local_branch.set_last_revision_info(*last_revision_info)
363
 
            if self._destroy_reference:
364
 
                self.referenced_branch.tags.merge_to(local_branch.tags)
365
 
                self.referenced_branch.update_references(local_branch)
 
193
            local_branch.set_last_revision_info(*reference_info)
366
194
        else:
367
195
            local_branch = self.local_branch
368
 
        if self._create_reference:
369
 
            format = branch.BranchReferenceFormat().initialize(self.bzrdir,
370
 
                target_branch=reference_branch)
371
196
        if self._destroy_tree:
372
197
            self.bzrdir.destroy_workingtree()
373
198
        if self._create_tree:
377
202
        if self._bind:
378
203
            bind_location = self._select_bind_location()
379
204
            local_branch.bind(branch.Branch.open(bind_location))
380
 
        if self._destroy_repository:
381
 
            self.bzrdir.destroy_repository()
382
 
        if self._repository_trees is not None:
383
 
            repo.set_make_working_trees(self._repository_trees)