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Viewing changes to breezy/git/branch.py

  • Committer: Breezy landing bot
  • Author(s): Jelmer Vernooij
  • Date: 2018-11-16 18:59:44 UTC
  • mfrom: (7143.15.15 more-cleanups)
  • Revision ID: breezy.the.bot@gmail.com-20181116185944-biefv1sub37qfybm
Sprinkle some PEP8iness.

Merged from https://code.launchpad.net/~jelmer/brz/more-cleanups/+merge/358611

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Lines of Context:
breezy/git/branch.py
 
1
# Copyright (C) 2007,2012 Canonical Ltd
 
2
# Copyright (C) 2009-2018 Jelmer Vernooij <jelmer@jelmer.uk>
 
3
#
 
4
# This program is free software; you can redistribute it and/or modify
 
5
# it under the terms of the GNU General Public License as published by
 
6
# the Free Software Foundation; either version 2 of the License, or
 
7
# (at your option) any later version.
 
8
#
 
9
# This program is distributed in the hope that it will be useful,
 
10
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
11
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
12
# GNU General Public License for more details.
 
13
#
 
14
# You should have received a copy of the GNU General Public License
 
15
# along with this program; if not, write to the Free Software
 
16
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
17
 
 
18
"""An adapter between a Git Branch and a Bazaar Branch"""
 
19
 
 
20
from __future__ import absolute_import
 
21
 
 
22
from io import BytesIO
 
23
from collections import defaultdict
 
24
 
 
25
from dulwich.objects import (
 
26
    NotCommitError,
 
27
    ZERO_SHA,
 
28
    )
 
29
from dulwich.repo import check_ref_format
 
30
 
 
31
from .. import (
 
32
    branch,
 
33
    config,
 
34
    controldir,
 
35
    errors,
 
36
    lock,
 
37
    repository as _mod_repository,
 
38
    revision,
 
39
    tag,
 
40
    trace,
 
41
    transport,
 
42
    urlutils,
 
43
    )
 
44
from ..foreign import ForeignBranch
 
45
from ..revision import (
 
46
    NULL_REVISION,
 
47
    )
 
48
from ..sixish import (
 
49
    text_type,
 
50
    viewitems,
 
51
    )
 
52
from ..trace import (
 
53
    is_quiet,
 
54
    mutter,
 
55
    warning,
 
56
    )
 
57
 
 
58
from .config import (
 
59
    GitBranchConfig,
 
60
    GitBranchStack,
 
61
    )
 
62
from .errors import (
 
63
    NoPushSupport,
 
64
    )
 
65
from .push import (
 
66
    remote_divergence,
 
67
    )
 
68
from .refs import (
 
69
    branch_name_to_ref,
 
70
    is_tag,
 
71
    ref_to_branch_name,
 
72
    ref_to_tag_name,
 
73
    remote_refs_dict_to_tag_refs,
 
74
    tag_name_to_ref,
 
75
    )
 
76
from .unpeel_map import (
 
77
    UnpeelMap,
 
78
    )
 
79
from .urls import git_url_to_bzr_url
 
80
 
 
81
 
 
82
class GitPullResult(branch.PullResult):
 
83
    """Result of a pull from a Git branch."""
 
84
 
 
85
    def _lookup_revno(self, revid):
 
86
        if not isinstance(revid, bytes):
 
87
            raise TypeError(revid)
 
88
        # Try in source branch first, it'll be faster
 
89
        with self.target_branch.lock_read():
 
90
            return self.target_branch.revision_id_to_revno(revid)
 
91
 
 
92
    @property
 
93
    def old_revno(self):
 
94
        return self._lookup_revno(self.old_revid)
 
95
 
 
96
    @property
 
97
    def new_revno(self):
 
98
        return self._lookup_revno(self.new_revid)
 
99
 
 
100
 
 
101
class GitTags(tag.BasicTags):
 
102
    """Ref-based tag dictionary."""
 
103
 
 
104
    def __init__(self, branch):
 
105
        self.branch = branch
 
106
        self.repository = branch.repository
 
107
 
 
108
    def _merge_to_remote_git(self, target_repo, source_tag_refs,
 
109
                             overwrite=False):
 
110
        updates = {}
 
111
        conflicts = []
 
112
 
 
113
        def get_changed_refs(old_refs):
 
114
            ret = dict(old_refs)
 
115
            for ref_name, tag_name, peeled, unpeeled in (
 
116
                    source_tag_refs.iteritems()):
 
117
                if old_refs.get(ref_name) == unpeeled:
 
118
                    pass
 
119
                elif overwrite or ref_name not in old_refs:
 
120
                    ret[ref_name] = unpeeled
 
121
                    updates[tag_name] = target_repo.lookup_foreign_revision_id(
 
122
                        peeled)
 
123
                else:
 
124
                    conflicts.append(
 
125
                        (tag_name,
 
126
                         self.repository.lookup_foreign_revision_id(peeled),
 
127
                         target_repo.lookup_foreign_revision_id(
 
128
                             old_refs[ref_name])))
 
129
            return ret
 
130
        target_repo.controldir.send_pack(
 
131
            get_changed_refs, lambda have, want: [])
 
132
        return updates, conflicts
 
133
 
 
134
    def _merge_to_local_git(self, target_repo, source_tag_refs,
 
135
                            overwrite=False):
 
136
        conflicts = []
 
137
        updates = {}
 
138
        for ref_name, tag_name, peeled, unpeeled in source_tag_refs:
 
139
            if target_repo._git.refs.get(ref_name) == unpeeled:
 
140
                pass
 
141
            elif overwrite or ref_name not in target_repo._git.refs:
 
142
                target_repo._git.refs[ref_name] = unpeeled or peeled
 
143
                try:
 
144
                    updates[tag_name] = (
 
145
                        self.repository.lookup_foreign_revision_id(peeled))
 
146
                except KeyError:
 
147
                    trace.warning('%s does not point to a valid object',
 
148
                                  tag_name)
 
149
                    continue
 
150
            else:
 
151
                try:
 
152
                    source_revid = self.repository.lookup_foreign_revision_id(
 
153
                        peeled)
 
154
                    target_revid = target_repo.lookup_foreign_revision_id(
 
155
                        target_repo._git.refs[ref_name])
 
156
                except KeyError:
 
157
                    trace.warning('%s does not point to a valid object',
 
158
                                  ref_name)
 
159
                    continue
 
160
                conflicts.append((tag_name, source_revid, target_revid))
 
161
        return updates, conflicts
 
162
 
 
163
    def _merge_to_git(self, to_tags, source_tag_refs, overwrite=False):
 
164
        target_repo = to_tags.repository
 
165
        if self.repository.has_same_location(target_repo):
 
166
            return {}, []
 
167
        try:
 
168
            if getattr(target_repo, "_git", None):
 
169
                return self._merge_to_local_git(
 
170
                    target_repo, source_tag_refs, overwrite)
 
171
            else:
 
172
                return self._merge_to_remote_git(
 
173
                    target_repo, source_tag_refs, overwrite)
 
174
        finally:
 
175
            to_tags.branch._tag_refs = None
 
176
 
 
177
    def _merge_to_non_git(self, to_tags, source_tag_refs, overwrite=False):
 
178
        unpeeled_map = defaultdict(set)
 
179
        conflicts = []
 
180
        updates = {}
 
181
        result = dict(to_tags.get_tag_dict())
 
182
        for ref_name, tag_name, peeled, unpeeled in source_tag_refs:
 
183
            if unpeeled is not None:
 
184
                unpeeled_map[peeled].add(unpeeled)
 
185
            try:
 
186
                bzr_revid = self.branch.lookup_foreign_revision_id(peeled)
 
187
            except NotCommitError:
 
188
                continue
 
189
            if result.get(tag_name) == bzr_revid:
 
190
                pass
 
191
            elif tag_name not in result or overwrite:
 
192
                result[tag_name] = bzr_revid
 
193
                updates[tag_name] = bzr_revid
 
194
            else:
 
195
                conflicts.append((tag_name, bzr_revid, result[tag_name]))
 
196
        to_tags._set_tag_dict(result)
 
197
        if len(unpeeled_map) > 0:
 
198
            map_file = UnpeelMap.from_repository(to_tags.branch.repository)
 
199
            map_file.update(unpeeled_map)
 
200
            map_file.save_in_repository(to_tags.branch.repository)
 
201
        return updates, conflicts
 
202
 
 
203
    def merge_to(self, to_tags, overwrite=False, ignore_master=False,
 
204
                 source_tag_refs=None):
 
205
        """See Tags.merge_to."""
 
206
        if source_tag_refs is None:
 
207
            source_tag_refs = self.branch.get_tag_refs()
 
208
        if self == to_tags:
 
209
            return {}, []
 
210
        if isinstance(to_tags, GitTags):
 
211
            return self._merge_to_git(to_tags, source_tag_refs,
 
212
                                      overwrite=overwrite)
 
213
        else:
 
214
            if ignore_master:
 
215
                master = None
 
216
            else:
 
217
                master = to_tags.branch.get_master_branch()
 
218
            if master is not None:
 
219
                master.lock_write()
 
220
            try:
 
221
                updates, conflicts = self._merge_to_non_git(
 
222
                    to_tags, source_tag_refs, overwrite=overwrite)
 
223
                if master is not None:
 
224
                    extra_updates, extra_conflicts = self.merge_to(
 
225
                        master.tags, overwrite=overwrite,
 
226
                        source_tag_refs=source_tag_refs,
 
227
                        ignore_master=ignore_master)
 
228
                    updates.update(extra_updates)
 
229
                    conflicts += extra_conflicts
 
230
                return updates, conflicts
 
231
            finally:
 
232
                if master is not None:
 
233
                    master.unlock()
 
234
 
 
235
    def get_tag_dict(self):
 
236
        ret = {}
 
237
        for (ref_name, tag_name, peeled, unpeeled) in (
 
238
                self.branch.get_tag_refs()):
 
239
            try:
 
240
                bzr_revid = self.branch.lookup_foreign_revision_id(peeled)
 
241
            except NotCommitError:
 
242
                continue
 
243
            else:
 
244
                ret[tag_name] = bzr_revid
 
245
        return ret
 
246
 
 
247
 
 
248
class LocalGitTagDict(GitTags):
 
249
    """Dictionary with tags in a local repository."""
 
250
 
 
251
    def __init__(self, branch):
 
252
        super(LocalGitTagDict, self).__init__(branch)
 
253
        self.refs = self.repository.controldir._git.refs
 
254
 
 
255
    def _set_tag_dict(self, to_dict):
 
256
        extra = set(self.refs.allkeys())
 
257
        for k, revid in viewitems(to_dict):
 
258
            name = tag_name_to_ref(k)
 
259
            if name in extra:
 
260
                extra.remove(name)
 
261
            self.set_tag(k, revid)
 
262
        for name in extra:
 
263
            if is_tag(name):
 
264
                del self.repository._git[name]
 
265
 
 
266
    def set_tag(self, name, revid):
 
267
        try:
 
268
            git_sha, mapping = self.branch.lookup_bzr_revision_id(revid)
 
269
        except errors.NoSuchRevision:
 
270
            raise errors.GhostTagsNotSupported(self)
 
271
        self.refs[tag_name_to_ref(name)] = git_sha
 
272
        self.branch._tag_refs = None
 
273
 
 
274
    def delete_tag(self, name):
 
275
        ref = tag_name_to_ref(name)
 
276
        if ref not in self.refs:
 
277
            raise errors.NoSuchTag(name)
 
278
        del self.refs[ref]
 
279
        self.branch._tag_refs = None
 
280
 
 
281
 
 
282
class GitBranchFormat(branch.BranchFormat):
 
283
 
 
284
    def network_name(self):
 
285
        return b"git"
 
286
 
 
287
    def supports_tags(self):
 
288
        return True
 
289
 
 
290
    def supports_leaving_lock(self):
 
291
        return False
 
292
 
 
293
    def supports_tags_referencing_ghosts(self):
 
294
        return False
 
295
 
 
296
    def tags_are_versioned(self):
 
297
        return False
 
298
 
 
299
    def get_foreign_tests_branch_factory(self):
 
300
        from .tests.test_branch import ForeignTestsBranchFactory
 
301
        return ForeignTestsBranchFactory()
 
302
 
 
303
    def make_tags(self, branch):
 
304
        try:
 
305
            return branch.tags
 
306
        except AttributeError:
 
307
            pass
 
308
        if getattr(branch.repository, "_git", None) is None:
 
309
            from .remote import RemoteGitTagDict
 
310
            return RemoteGitTagDict(branch)
 
311
        else:
 
312
            return LocalGitTagDict(branch)
 
313
 
 
314
    def initialize(self, a_controldir, name=None, repository=None,
 
315
                   append_revisions_only=None):
 
316
        raise NotImplementedError(self.initialize)
 
317
 
 
318
    def get_reference(self, controldir, name=None):
 
319
        return controldir.get_branch_reference(name=name)
 
320
 
 
321
    def set_reference(self, controldir, name, target):
 
322
        return controldir.set_branch_reference(target, name)
 
323
 
 
324
 
 
325
class LocalGitBranchFormat(GitBranchFormat):
 
326
 
 
327
    def get_format_description(self):
 
328
        return 'Local Git Branch'
 
329
 
 
330
    @property
 
331
    def _matchingcontroldir(self):
 
332
        from .dir import LocalGitControlDirFormat
 
333
        return LocalGitControlDirFormat()
 
334
 
 
335
    def initialize(self, a_controldir, name=None, repository=None,
 
336
                   append_revisions_only=None):
 
337
        from .dir import LocalGitDir
 
338
        if not isinstance(a_controldir, LocalGitDir):
 
339
            raise errors.IncompatibleFormat(self, a_controldir._format)
 
340
        return a_controldir.create_branch(
 
341
            repository=repository, name=name,
 
342
            append_revisions_only=append_revisions_only)
 
343
 
 
344
 
 
345
class GitBranch(ForeignBranch):
 
346
    """An adapter to git repositories for bzr Branch objects."""
 
347
 
 
348
    @property
 
349
    def control_transport(self):
 
350
        return self._control_transport
 
351
 
 
352
    @property
 
353
    def user_transport(self):
 
354
        return self._user_transport
 
355
 
 
356
    def __init__(self, controldir, repository, ref, format):
 
357
        self.repository = repository
 
358
        self._format = format
 
359
        self.controldir = controldir
 
360
        self._lock_mode = None
 
361
        self._lock_count = 0
 
362
        super(GitBranch, self).__init__(repository.get_mapping())
 
363
        self.ref = ref
 
364
        self._head = None
 
365
        self._user_transport = controldir.user_transport.clone('.')
 
366
        self._control_transport = controldir.control_transport.clone('.')
 
367
        self._tag_refs = None
 
368
        params = {}
 
369
        try:
 
370
            self.name = ref_to_branch_name(ref)
 
371
        except ValueError:
 
372
            self.name = None
 
373
            if self.ref is not None:
 
374
                params = {"ref": urlutils.escape(self.ref)}
 
375
        else:
 
376
            if self.name != "":
 
377
                params = {"branch": urlutils.escape(self.name)}
 
378
        for k, v in params.items():
 
379
            self._user_transport.set_segment_parameter(k, v)
 
380
            self._control_transport.set_segment_parameter(k, v)
 
381
        self.base = controldir.user_transport.base
 
382
 
 
383
    def _get_checkout_format(self, lightweight=False):
 
384
        """Return the most suitable metadir for a checkout of this branch.
 
385
        Weaves are used if this branch's repository uses weaves.
 
386
        """
 
387
        if lightweight:
 
388
            return controldir.format_registry.make_controldir("git")
 
389
        else:
 
390
            return controldir.format_registry.make_controldir("default")
 
391
 
 
392
    def get_child_submit_format(self):
 
393
        """Return the preferred format of submissions to this branch."""
 
394
        ret = self.get_config_stack().get("child_submit_format")
 
395
        if ret is not None:
 
396
            return ret
 
397
        return "git"
 
398
 
 
399
    def get_config(self):
 
400
        return GitBranchConfig(self)
 
401
 
 
402
    def get_config_stack(self):
 
403
        return GitBranchStack(self)
 
404
 
 
405
    def _get_nick(self, local=False, possible_master_transports=None):
 
406
        """Find the nick name for this branch.
 
407
 
 
408
        :return: Branch nick
 
409
        """
 
410
        if getattr(self.repository, '_git', None):
 
411
            cs = self.repository._git.get_config_stack()
 
412
            try:
 
413
                return cs.get((b"branch", self.name.encode('utf-8')),
 
414
                               b"nick").decode("utf-8")
 
415
            except KeyError:
 
416
                pass
 
417
        return self.name or u"HEAD"
 
418
 
 
419
    def _set_nick(self, nick):
 
420
        cf = self.repository._git.get_config()
 
421
        cf.set((b"branch", self.name.encode('utf-8')),
 
422
               b"nick", nick.encode("utf-8"))
 
423
        f = BytesIO()
 
424
        cf.write_to_file(f)
 
425
        self.repository._git._put_named_file('config', f.getvalue())
 
426
 
 
427
    nick = property(_get_nick, _set_nick)
 
428
 
 
429
    def __repr__(self):
 
430
        return "<%s(%r, %r)>" % (self.__class__.__name__, self.repository.base,
 
431
                                 self.name)
 
432
 
 
433
    def generate_revision_history(self, revid, last_rev=None,
 
434
                                  other_branch=None):
 
435
        if last_rev is not None:
 
436
            graph = self.repository.get_graph()
 
437
            if not graph.is_ancestor(last_rev, revid):
 
438
                # our previous tip is not merged into stop_revision
 
439
                raise errors.DivergedBranches(self, other_branch)
 
440
 
 
441
        self.set_last_revision(revid)
 
442
 
 
443
    def lock_write(self, token=None):
 
444
        if token is not None:
 
445
            raise errors.TokenLockingNotSupported(self)
 
446
        if self._lock_mode:
 
447
            if self._lock_mode == 'r':
 
448
                raise errors.ReadOnlyError(self)
 
449
            self._lock_count += 1
 
450
        else:
 
451
            self._lock_ref()
 
452
            self._lock_mode = 'w'
 
453
            self._lock_count = 1
 
454
        self.repository.lock_write()
 
455
        return lock.LogicalLockResult(self.unlock)
 
456
 
 
457
    def leave_lock_in_place(self):
 
458
        raise NotImplementedError(self.leave_lock_in_place)
 
459
 
 
460
    def dont_leave_lock_in_place(self):
 
461
        raise NotImplementedError(self.dont_leave_lock_in_place)
 
462
 
 
463
    def get_stacked_on_url(self):
 
464
        # Git doesn't do stacking (yet...)
 
465
        raise branch.UnstackableBranchFormat(self._format, self.base)
 
466
 
 
467
    def _get_parent_location(self):
 
468
        """See Branch.get_parent()."""
 
469
        # FIXME: Set "origin" url from .git/config ?
 
470
        cs = self.repository._git.get_config_stack()
 
471
        try:
 
472
            location = cs.get((b"remote", b'origin'), b"url")
 
473
        except KeyError:
 
474
            return None
 
475
 
 
476
        params = {}
 
477
        try:
 
478
            ref = cs.get((b"remote", b"origin"), b"merge")
 
479
        except KeyError:
 
480
            pass
 
481
        else:
 
482
            if ref != b'HEAD':
 
483
                try:
 
484
                    params['branch'] = urlutils.escape(ref_to_branch_name(ref))
 
485
                except ValueError:
 
486
                    params['ref'] = urlutils.quote_from_bytes(ref)
 
487
 
 
488
        url = git_url_to_bzr_url(location.decode('utf-8'))
 
489
        return urlutils.join_segment_parameters(url, params)
 
490
 
 
491
    def set_parent(self, location):
 
492
        # FIXME: Set "origin" url in .git/config ?
 
493
        cs = self.repository._git.get_config()
 
494
        this_url = urlutils.split_segment_parameters(self.user_url)[0]
 
495
        target_url, target_params = urlutils.split_segment_parameters(location)
 
496
        location = urlutils.relative_url(this_url, target_url)
 
497
        cs.set((b"remote", b"origin"), b"url", location)
 
498
        if 'branch' in target_params:
 
499
            cs.set((b"remote", b"origin"), b"merge",
 
500
                   branch_name_to_ref(target_params['branch']))
 
501
        elif 'ref' in target_params:
 
502
            cs.set((b"remote", b"origin"), b"merge",
 
503
                   target_params['ref'])
 
504
        else:
 
505
            # TODO(jelmer): Maybe unset rather than setting to HEAD?
 
506
            cs.set((b"remote", b"origin"), b"merge", 'HEAD')
 
507
        f = BytesIO()
 
508
        cs.write_to_file(f)
 
509
        self.repository._git._put_named_file('config', f.getvalue())
 
510
 
 
511
    def break_lock(self):
 
512
        raise NotImplementedError(self.break_lock)
 
513
 
 
514
    def lock_read(self):
 
515
        if self._lock_mode:
 
516
            if self._lock_mode not in ('r', 'w'):
 
517
                raise ValueError(self._lock_mode)
 
518
            self._lock_count += 1
 
519
        else:
 
520
            self._lock_mode = 'r'
 
521
            self._lock_count = 1
 
522
        self.repository.lock_read()
 
523
        return lock.LogicalLockResult(self.unlock)
 
524
 
 
525
    def peek_lock_mode(self):
 
526
        return self._lock_mode
 
527
 
 
528
    def is_locked(self):
 
529
        return (self._lock_mode is not None)
 
530
 
 
531
    def _lock_ref(self):
 
532
        pass
 
533
 
 
534
    def _unlock_ref(self):
 
535
        pass
 
536
 
 
537
    def unlock(self):
 
538
        """See Branch.unlock()."""
 
539
        if self._lock_count == 0:
 
540
            raise errors.LockNotHeld(self)
 
541
        try:
 
542
            self._lock_count -= 1
 
543
            if self._lock_count == 0:
 
544
                if self._lock_mode == 'w':
 
545
                    self._unlock_ref()
 
546
                self._lock_mode = None
 
547
                self._clear_cached_state()
 
548
        finally:
 
549
            self.repository.unlock()
 
550
 
 
551
    def get_physical_lock_status(self):
 
552
        return False
 
553
 
 
554
    def last_revision(self):
 
555
        with self.lock_read():
 
556
            # perhaps should escape this ?
 
557
            if self.head is None:
 
558
                return revision.NULL_REVISION
 
559
            return self.lookup_foreign_revision_id(self.head)
 
560
 
 
561
    def _basic_push(self, target, overwrite=False, stop_revision=None):
 
562
        return branch.InterBranch.get(self, target)._basic_push(
 
563
            overwrite, stop_revision)
 
564
 
 
565
    def lookup_foreign_revision_id(self, foreign_revid):
 
566
        try:
 
567
            return self.repository.lookup_foreign_revision_id(foreign_revid,
 
568
                                                              self.mapping)
 
569
        except KeyError:
 
570
            # Let's try..
 
571
            return self.mapping.revision_id_foreign_to_bzr(foreign_revid)
 
572
 
 
573
    def lookup_bzr_revision_id(self, revid):
 
574
        return self.repository.lookup_bzr_revision_id(
 
575
            revid, mapping=self.mapping)
 
576
 
 
577
    def get_unshelver(self, tree):
 
578
        raise errors.StoringUncommittedNotSupported(self)
 
579
 
 
580
    def _clear_cached_state(self):
 
581
        super(GitBranch, self)._clear_cached_state()
 
582
        self._tag_refs = None
 
583
 
 
584
    def _iter_tag_refs(self, refs):
 
585
        """Iterate over the tag refs.
 
586
 
 
587
        :param refs: Refs dictionary (name -> git sha1)
 
588
        :return: iterator over (ref_name, tag_name, peeled_sha1, unpeeled_sha1)
 
589
        """
 
590
        raise NotImplementedError(self._iter_tag_refs)
 
591
 
 
592
    def get_tag_refs(self):
 
593
        with self.lock_read():
 
594
            if self._tag_refs is None:
 
595
                self._tag_refs = list(self._iter_tag_refs())
 
596
            return self._tag_refs
 
597
 
 
598
 
 
599
class LocalGitBranch(GitBranch):
 
600
    """A local Git branch."""
 
601
 
 
602
    def __init__(self, controldir, repository, ref):
 
603
        super(LocalGitBranch, self).__init__(controldir, repository, ref,
 
604
                                             LocalGitBranchFormat())
 
605
 
 
606
    def create_checkout(self, to_location, revision_id=None, lightweight=False,
 
607
                        accelerator_tree=None, hardlink=False):
 
608
        t = transport.get_transport(to_location)
 
609
        t.ensure_base()
 
610
        format = self._get_checkout_format(lightweight=lightweight)
 
611
        checkout = format.initialize_on_transport(t)
 
612
        if lightweight:
 
613
            from_branch = checkout.set_branch_reference(target_branch=self)
 
614
        else:
 
615
            policy = checkout.determine_repository_policy()
 
616
            policy.acquire_repository()
 
617
            checkout_branch = checkout.create_branch()
 
618
            checkout_branch.bind(self)
 
619
            checkout_branch.pull(self, stop_revision=revision_id)
 
620
            from_branch = None
 
621
        return checkout.create_workingtree(
 
622
            revision_id, from_branch=from_branch, hardlink=hardlink)
 
623
 
 
624
    def _lock_ref(self):
 
625
        self._ref_lock = self.repository._git.refs.lock_ref(self.ref)
 
626
 
 
627
    def _unlock_ref(self):
 
628
        self._ref_lock.unlock()
 
629
 
 
630
    def break_lock(self):
 
631
        self.repository._git.refs.unlock_ref(self.ref)
 
632
 
 
633
    def fetch(self, from_branch, last_revision=None, limit=None):
 
634
        return branch.InterBranch.get(from_branch, self).fetch(
 
635
            stop_revision=last_revision, limit=limit)
 
636
 
 
637
    def _gen_revision_history(self):
 
638
        if self.head is None:
 
639
            return []
 
640
        last_revid = self.last_revision()
 
641
        graph = self.repository.get_graph()
 
642
        try:
 
643
            ret = list(graph.iter_lefthand_ancestry(
 
644
                last_revid, (revision.NULL_REVISION, )))
 
645
        except errors.RevisionNotPresent as e:
 
646
            raise errors.GhostRevisionsHaveNoRevno(last_revid, e.revision_id)
 
647
        ret.reverse()
 
648
        return ret
 
649
 
 
650
    def _get_head(self):
 
651
        try:
 
652
            return self.repository._git.refs[self.ref]
 
653
        except KeyError:
 
654
            return None
 
655
 
 
656
    def _read_last_revision_info(self):
 
657
        last_revid = self.last_revision()
 
658
        graph = self.repository.get_graph()
 
659
        try:
 
660
            revno = graph.find_distance_to_null(
 
661
                last_revid, [(revision.NULL_REVISION, 0)])
 
662
        except errors.GhostRevisionsHaveNoRevno:
 
663
            revno = None
 
664
        return revno, last_revid
 
665
 
 
666
    def set_last_revision_info(self, revno, revision_id):
 
667
        self.set_last_revision(revision_id)
 
668
        self._last_revision_info_cache = revno, revision_id
 
669
 
 
670
    def set_last_revision(self, revid):
 
671
        if not revid or not isinstance(revid, bytes):
 
672
            raise errors.InvalidRevisionId(revision_id=revid, branch=self)
 
673
        if revid == NULL_REVISION:
 
674
            newhead = None
 
675
        else:
 
676
            (newhead, self.mapping) = self.repository.lookup_bzr_revision_id(
 
677
                revid)
 
678
            if self.mapping is None:
 
679
                raise AssertionError
 
680
        self._set_head(newhead)
 
681
 
 
682
    def _set_head(self, value):
 
683
        if value == ZERO_SHA:
 
684
            raise ValueError(value)
 
685
        self._head = value
 
686
        if value is None:
 
687
            del self.repository._git.refs[self.ref]
 
688
        else:
 
689
            self.repository._git.refs[self.ref] = self._head
 
690
        self._clear_cached_state()
 
691
 
 
692
    head = property(_get_head, _set_head)
 
693
 
 
694
    def get_push_location(self):
 
695
        """See Branch.get_push_location."""
 
696
        push_loc = self.get_config_stack().get('push_location')
 
697
        return push_loc
 
698
 
 
699
    def set_push_location(self, location):
 
700
        """See Branch.set_push_location."""
 
701
        self.get_config().set_user_option('push_location', location,
 
702
                                          store=config.STORE_LOCATION)
 
703
 
 
704
    def supports_tags(self):
 
705
        return True
 
706
 
 
707
    def store_uncommitted(self, creator):
 
708
        raise errors.StoringUncommittedNotSupported(self)
 
709
 
 
710
    def _iter_tag_refs(self):
 
711
        """Iterate over the tag refs.
 
712
 
 
713
        :param refs: Refs dictionary (name -> git sha1)
 
714
        :return: iterator over (ref_name, tag_name, peeled_sha1, unpeeled_sha1)
 
715
        """
 
716
        refs = self.repository._git.refs
 
717
        for ref_name, unpeeled in viewitems(refs.as_dict()):
 
718
            try:
 
719
                tag_name = ref_to_tag_name(ref_name)
 
720
            except (ValueError, UnicodeDecodeError):
 
721
                continue
 
722
            peeled = refs.get_peeled(ref_name)
 
723
            if peeled is None:
 
724
                peeled = unpeeled
 
725
            if not isinstance(tag_name, text_type):
 
726
                raise TypeError(tag_name)
 
727
            yield (ref_name, tag_name, peeled, unpeeled)
 
728
 
 
729
    def create_memorytree(self):
 
730
        from .memorytree import GitMemoryTree
 
731
        return GitMemoryTree(self, self.repository._git.object_store,
 
732
                             self.head)
 
733
 
 
734
    def reference_parent(self, path, file_id=None, possible_transports=None):
 
735
        """Return the parent branch for a tree-reference file_id
 
736
 
 
737
        :param path: The path of the file_id in the tree
 
738
        :param file_id: Optional file_id of the tree reference
 
739
        :return: A branch associated with the file_id
 
740
        """
 
741
        # FIXME should provide multiple branches, based on config
 
742
        url = urlutils.join(self.user_url, path)
 
743
        return branch.Branch.open(
 
744
            url,
 
745
            possible_transports=possible_transports)
 
746
 
 
747
 
 
748
def _quick_lookup_revno(local_branch, remote_branch, revid):
 
749
    if not isinstance(revid, bytes):
 
750
        raise TypeError(revid)
 
751
    # Try in source branch first, it'll be faster
 
752
    with local_branch.lock_read():
 
753
        try:
 
754
            return local_branch.revision_id_to_revno(revid)
 
755
        except errors.NoSuchRevision:
 
756
            graph = local_branch.repository.get_graph()
 
757
            try:
 
758
                return graph.find_distance_to_null(
 
759
                    revid, [(revision.NULL_REVISION, 0)])
 
760
            except errors.GhostRevisionsHaveNoRevno:
 
761
                # FIXME: Check using graph.find_distance_to_null() ?
 
762
                with remote_branch.lock_read():
 
763
                    return remote_branch.revision_id_to_revno(revid)
 
764
 
 
765
 
 
766
class GitBranchPullResult(branch.PullResult):
 
767
 
 
768
    def __init__(self):
 
769
        super(GitBranchPullResult, self).__init__()
 
770
        self.new_git_head = None
 
771
        self._old_revno = None
 
772
        self._new_revno = None
 
773
 
 
774
    def report(self, to_file):
 
775
        if not is_quiet():
 
776
            if self.old_revid == self.new_revid:
 
777
                to_file.write('No revisions to pull.\n')
 
778
            elif self.new_git_head is not None:
 
779
                to_file.write('Now on revision %d (git sha: %s).\n' %
 
780
                              (self.new_revno, self.new_git_head))
 
781
            else:
 
782
                to_file.write('Now on revision %d.\n' % (self.new_revno,))
 
783
        self._show_tag_conficts(to_file)
 
784
 
 
785
    def _lookup_revno(self, revid):
 
786
        return _quick_lookup_revno(self.target_branch, self.source_branch,
 
787
                                   revid)
 
788
 
 
789
    def _get_old_revno(self):
 
790
        if self._old_revno is not None:
 
791
            return self._old_revno
 
792
        return self._lookup_revno(self.old_revid)
 
793
 
 
794
    def _set_old_revno(self, revno):
 
795
        self._old_revno = revno
 
796
 
 
797
    old_revno = property(_get_old_revno, _set_old_revno)
 
798
 
 
799
    def _get_new_revno(self):
 
800
        if self._new_revno is not None:
 
801
            return self._new_revno
 
802
        return self._lookup_revno(self.new_revid)
 
803
 
 
804
    def _set_new_revno(self, revno):
 
805
        self._new_revno = revno
 
806
 
 
807
    new_revno = property(_get_new_revno, _set_new_revno)
 
808
 
 
809
 
 
810
class GitBranchPushResult(branch.BranchPushResult):
 
811
 
 
812
    def _lookup_revno(self, revid):
 
813
        return _quick_lookup_revno(self.source_branch, self.target_branch,
 
814
                                   revid)
 
815
 
 
816
    @property
 
817
    def old_revno(self):
 
818
        return self._lookup_revno(self.old_revid)
 
819
 
 
820
    @property
 
821
    def new_revno(self):
 
822
        new_original_revno = getattr(self, "new_original_revno", None)
 
823
        if new_original_revno:
 
824
            return new_original_revno
 
825
        if getattr(self, "new_original_revid", None) is not None:
 
826
            return self._lookup_revno(self.new_original_revid)
 
827
        return self._lookup_revno(self.new_revid)
 
828
 
 
829
 
 
830
class InterFromGitBranch(branch.GenericInterBranch):
 
831
    """InterBranch implementation that pulls from Git into bzr."""
 
832
 
 
833
    @staticmethod
 
834
    def _get_branch_formats_to_test():
 
835
        try:
 
836
            default_format = branch.format_registry.get_default()
 
837
        except AttributeError:
 
838
            default_format = branch.BranchFormat._default_format
 
839
        from .remote import RemoteGitBranchFormat
 
840
        return [
 
841
            (RemoteGitBranchFormat(), default_format),
 
842
            (LocalGitBranchFormat(), default_format)]
 
843
 
 
844
    @classmethod
 
845
    def _get_interrepo(self, source, target):
 
846
        return _mod_repository.InterRepository.get(
 
847
            source.repository, target.repository)
 
848
 
 
849
    @classmethod
 
850
    def is_compatible(cls, source, target):
 
851
        if not isinstance(source, GitBranch):
 
852
            return False
 
853
        if isinstance(target, GitBranch):
 
854
            # InterLocalGitRemoteGitBranch or InterToGitBranch should be used
 
855
            return False
 
856
        if (getattr(cls._get_interrepo(source, target), "fetch_objects", None)
 
857
                is None):
 
858
            # fetch_objects is necessary for this to work
 
859
            return False
 
860
        return True
 
861
 
 
862
    def fetch(self, stop_revision=None, fetch_tags=None, limit=None):
 
863
        self.fetch_objects(stop_revision, fetch_tags=fetch_tags, limit=limit)
 
864
 
 
865
    def fetch_objects(self, stop_revision, fetch_tags, limit=None):
 
866
        interrepo = self._get_interrepo(self.source, self.target)
 
867
        if fetch_tags is None:
 
868
            c = self.source.get_config_stack()
 
869
            fetch_tags = c.get('branch.fetch_tags')
 
870
 
 
871
        def determine_wants(heads):
 
872
            if stop_revision is None:
 
873
                try:
 
874
                    head = heads[self.source.ref]
 
875
                except KeyError:
 
876
                    self._last_revid = revision.NULL_REVISION
 
877
                else:
 
878
                    self._last_revid = self.source.lookup_foreign_revision_id(
 
879
                        head)
 
880
            else:
 
881
                self._last_revid = stop_revision
 
882
            real = interrepo.get_determine_wants_revids(
 
883
                [self._last_revid], include_tags=fetch_tags)
 
884
            return real(heads)
 
885
        pack_hint, head, refs = interrepo.fetch_objects(
 
886
            determine_wants, self.source.mapping, limit=limit)
 
887
        if (pack_hint is not None and
 
888
                self.target.repository._format.pack_compresses):
 
889
            self.target.repository.pack(hint=pack_hint)
 
890
        return head, refs
 
891
 
 
892
    def _update_revisions(self, stop_revision=None, overwrite=False):
 
893
        head, refs = self.fetch_objects(stop_revision, fetch_tags=None)
 
894
        if overwrite:
 
895
            prev_last_revid = None
 
896
        else:
 
897
            prev_last_revid = self.target.last_revision()
 
898
        self.target.generate_revision_history(
 
899
            self._last_revid, last_rev=prev_last_revid,
 
900
            other_branch=self.source)
 
901
        return head, refs
 
902
 
 
903
    def _basic_pull(self, stop_revision, overwrite, run_hooks,
 
904
                    _override_hook_target, _hook_master):
 
905
        if overwrite is True:
 
906
            overwrite = set(["history", "tags"])
 
907
        elif not overwrite:
 
908
            overwrite = set()
 
909
        result = GitBranchPullResult()
 
910
        result.source_branch = self.source
 
911
        if _override_hook_target is None:
 
912
            result.target_branch = self.target
 
913
        else:
 
914
            result.target_branch = _override_hook_target
 
915
        with self.target.lock_write(), self.source.lock_read():
 
916
            # We assume that during 'pull' the target repository is closer than
 
917
            # the source one.
 
918
            (result.old_revno, result.old_revid) = \
 
919
                self.target.last_revision_info()
 
920
            result.new_git_head, remote_refs = self._update_revisions(
 
921
                stop_revision, overwrite=("history" in overwrite))
 
922
            tags_ret = self.source.tags.merge_to(
 
923
                self.target.tags, ("tags" in overwrite), ignore_master=True)
 
924
            if isinstance(tags_ret, tuple):
 
925
                result.tag_updates, result.tag_conflicts = tags_ret
 
926
            else:
 
927
                result.tag_conflicts = tags_ret
 
928
            (result.new_revno, result.new_revid) = \
 
929
                self.target.last_revision_info()
 
930
            if _hook_master:
 
931
                result.master_branch = _hook_master
 
932
                result.local_branch = result.target_branch
 
933
            else:
 
934
                result.master_branch = result.target_branch
 
935
                result.local_branch = None
 
936
            if run_hooks:
 
937
                for hook in branch.Branch.hooks['post_pull']:
 
938
                    hook(result)
 
939
            return result
 
940
 
 
941
    def pull(self, overwrite=False, stop_revision=None,
 
942
             possible_transports=None, _hook_master=None, run_hooks=True,
 
943
             _override_hook_target=None, local=False):
 
944
        """See Branch.pull.
 
945
 
 
946
        :param _hook_master: Private parameter - set the branch to
 
947
            be supplied as the master to pull hooks.
 
948
        :param run_hooks: Private parameter - if false, this branch
 
949
            is being called because it's the master of the primary branch,
 
950
            so it should not run its hooks.
 
951
        :param _override_hook_target: Private parameter - set the branch to be
 
952
            supplied as the target_branch to pull hooks.
 
953
        """
 
954
        # This type of branch can't be bound.
 
955
        bound_location = self.target.get_bound_location()
 
956
        if local and not bound_location:
 
957
            raise errors.LocalRequiresBoundBranch()
 
958
        master_branch = None
 
959
        source_is_master = False
 
960
        self.source.lock_read()
 
961
        if bound_location:
 
962
            # bound_location comes from a config file, some care has to be
 
963
            # taken to relate it to source.user_url
 
964
            normalized = urlutils.normalize_url(bound_location)
 
965
            try:
 
966
                relpath = self.source.user_transport.relpath(normalized)
 
967
                source_is_master = (relpath == '')
 
968
            except (errors.PathNotChild, urlutils.InvalidURL):
 
969
                source_is_master = False
 
970
        if not local and bound_location and not source_is_master:
 
971
            # not pulling from master, so we need to update master.
 
972
            master_branch = self.target.get_master_branch(possible_transports)
 
973
            master_branch.lock_write()
 
974
        try:
 
975
            try:
 
976
                if master_branch:
 
977
                    # pull from source into master.
 
978
                    master_branch.pull(self.source, overwrite, stop_revision,
 
979
                                       run_hooks=False)
 
980
                result = self._basic_pull(stop_revision, overwrite, run_hooks,
 
981
                                          _override_hook_target,
 
982
                                          _hook_master=master_branch)
 
983
            finally:
 
984
                self.source.unlock()
 
985
        finally:
 
986
            if master_branch:
 
987
                master_branch.unlock()
 
988
        return result
 
989
 
 
990
    def _basic_push(self, overwrite, stop_revision):
 
991
        if overwrite is True:
 
992
            overwrite = set(["history", "tags"])
 
993
        elif not overwrite:
 
994
            overwrite = set()
 
995
        result = branch.BranchPushResult()
 
996
        result.source_branch = self.source
 
997
        result.target_branch = self.target
 
998
        result.old_revno, result.old_revid = self.target.last_revision_info()
 
999
        result.new_git_head, remote_refs = self._update_revisions(
 
1000
            stop_revision, overwrite=("history" in overwrite))
 
1001
        tags_ret = self.source.tags.merge_to(
 
1002
            self.target.tags, "tags" in overwrite, ignore_master=True)
 
1003
        (result.tag_updates, result.tag_conflicts) = tags_ret
 
1004
        result.new_revno, result.new_revid = self.target.last_revision_info()
 
1005
        return result
 
1006
 
 
1007
 
 
1008
class InterGitBranch(branch.GenericInterBranch):
 
1009
    """InterBranch implementation that pulls between Git branches."""
 
1010
 
 
1011
    def fetch(self, stop_revision=None, fetch_tags=None, limit=None):
 
1012
        raise NotImplementedError(self.fetch)
 
1013
 
 
1014
 
 
1015
class InterLocalGitRemoteGitBranch(InterGitBranch):
 
1016
    """InterBranch that copies from a local to a remote git branch."""
 
1017
 
 
1018
    @staticmethod
 
1019
    def _get_branch_formats_to_test():
 
1020
        from .remote import RemoteGitBranchFormat
 
1021
        return [
 
1022
            (LocalGitBranchFormat(), RemoteGitBranchFormat())]
 
1023
 
 
1024
    @classmethod
 
1025
    def is_compatible(self, source, target):
 
1026
        from .remote import RemoteGitBranch
 
1027
        return (isinstance(source, LocalGitBranch) and
 
1028
                isinstance(target, RemoteGitBranch))
 
1029
 
 
1030
    def _basic_push(self, overwrite, stop_revision):
 
1031
        result = GitBranchPushResult()
 
1032
        result.source_branch = self.source
 
1033
        result.target_branch = self.target
 
1034
        if stop_revision is None:
 
1035
            stop_revision = self.source.last_revision()
 
1036
 
 
1037
        def get_changed_refs(old_refs):
 
1038
            old_ref = old_refs.get(self.target.ref, None)
 
1039
            if old_ref is None:
 
1040
                result.old_revid = revision.NULL_REVISION
 
1041
            else:
 
1042
                result.old_revid = self.target.lookup_foreign_revision_id(
 
1043
                    old_ref)
 
1044
            new_ref = self.source.repository.lookup_bzr_revision_id(
 
1045
                stop_revision)[0]
 
1046
            if not overwrite:
 
1047
                if remote_divergence(
 
1048
                        old_ref, new_ref,
 
1049
                        self.source.repository._git.object_store):
 
1050
                    raise errors.DivergedBranches(self.source, self.target)
 
1051
            refs = {self.target.ref: new_ref}
 
1052
            result.new_revid = stop_revision
 
1053
            for name, sha in viewitems(
 
1054
                    self.source.repository._git.refs.as_dict(b"refs/tags")):
 
1055
                refs[tag_name_to_ref(name)] = sha
 
1056
            return refs
 
1057
        self.target.repository.send_pack(
 
1058
            get_changed_refs,
 
1059
            self.source.repository._git.object_store.generate_pack_data)
 
1060
        return result
 
1061
 
 
1062
 
 
1063
class InterGitLocalGitBranch(InterGitBranch):
 
1064
    """InterBranch that copies from a remote to a local git branch."""
 
1065
 
 
1066
    @staticmethod
 
1067
    def _get_branch_formats_to_test():
 
1068
        from .remote import RemoteGitBranchFormat
 
1069
        return [
 
1070
            (RemoteGitBranchFormat(), LocalGitBranchFormat()),
 
1071
            (LocalGitBranchFormat(), LocalGitBranchFormat())]
 
1072
 
 
1073
    @classmethod
 
1074
    def is_compatible(self, source, target):
 
1075
        return (isinstance(source, GitBranch) and
 
1076
                isinstance(target, LocalGitBranch))
 
1077
 
 
1078
    def fetch(self, stop_revision=None, fetch_tags=None, limit=None):
 
1079
        interrepo = _mod_repository.InterRepository.get(self.source.repository,
 
1080
                                                        self.target.repository)
 
1081
        if stop_revision is None:
 
1082
            stop_revision = self.source.last_revision()
 
1083
        determine_wants = interrepo.get_determine_wants_revids(
 
1084
            [stop_revision], include_tags=fetch_tags)
 
1085
        interrepo.fetch_objects(determine_wants, limit=limit)
 
1086
 
 
1087
    def _basic_push(self, overwrite=False, stop_revision=None):
 
1088
        if overwrite is True:
 
1089
            overwrite = set(["history", "tags"])
 
1090
        elif not overwrite:
 
1091
            overwrite = set()
 
1092
        result = GitBranchPushResult()
 
1093
        result.source_branch = self.source
 
1094
        result.target_branch = self.target
 
1095
        result.old_revid = self.target.last_revision()
 
1096
        refs, stop_revision = self.update_refs(stop_revision)
 
1097
        self.target.generate_revision_history(
 
1098
            stop_revision,
 
1099
            (result.old_revid if ("history" not in overwrite) else None),
 
1100
            other_branch=self.source)
 
1101
        tags_ret = self.source.tags.merge_to(
 
1102
            self.target.tags,
 
1103
            source_tag_refs=remote_refs_dict_to_tag_refs(refs),
 
1104
            overwrite=("tags" in overwrite))
 
1105
        if isinstance(tags_ret, tuple):
 
1106
            (result.tag_updates, result.tag_conflicts) = tags_ret
 
1107
        else:
 
1108
            result.tag_conflicts = tags_ret
 
1109
        result.new_revid = self.target.last_revision()
 
1110
        return result
 
1111
 
 
1112
    def update_refs(self, stop_revision=None):
 
1113
        interrepo = _mod_repository.InterRepository.get(
 
1114
            self.source.repository, self.target.repository)
 
1115
        c = self.source.get_config_stack()
 
1116
        fetch_tags = c.get('branch.fetch_tags')
 
1117
 
 
1118
        if stop_revision is None:
 
1119
            refs = interrepo.fetch(branches=[self.source.ref], include_tags=fetch_tags)
 
1120
            try:
 
1121
                head = refs[self.source.ref]
 
1122
            except KeyError:
 
1123
                stop_revision = revision.NULL_REVISION
 
1124
            else:
 
1125
                stop_revision = self.target.lookup_foreign_revision_id(head)
 
1126
        else:
 
1127
            refs = interrepo.fetch(
 
1128
                revision_id=stop_revision, include_tags=fetch_tags)
 
1129
        return refs, stop_revision
 
1130
 
 
1131
    def pull(self, stop_revision=None, overwrite=False,
 
1132
             possible_transports=None, run_hooks=True, local=False):
 
1133
        # This type of branch can't be bound.
 
1134
        if local:
 
1135
            raise errors.LocalRequiresBoundBranch()
 
1136
        if overwrite is True:
 
1137
            overwrite = set(["history", "tags"])
 
1138
        elif not overwrite:
 
1139
            overwrite = set()
 
1140
 
 
1141
        result = GitPullResult()
 
1142
        result.source_branch = self.source
 
1143
        result.target_branch = self.target
 
1144
        with self.target.lock_write(), self.source.lock_read():
 
1145
            result.old_revid = self.target.last_revision()
 
1146
            refs, stop_revision = self.update_refs(stop_revision)
 
1147
            self.target.generate_revision_history(
 
1148
                stop_revision,
 
1149
                (result.old_revid if ("history" not in overwrite) else None),
 
1150
                other_branch=self.source)
 
1151
            tags_ret = self.source.tags.merge_to(
 
1152
                self.target.tags, overwrite=("tags" in overwrite),
 
1153
                source_tag_refs=remote_refs_dict_to_tag_refs(refs))
 
1154
            if isinstance(tags_ret, tuple):
 
1155
                (result.tag_updates, result.tag_conflicts) = tags_ret
 
1156
            else:
 
1157
                result.tag_conflicts = tags_ret
 
1158
            result.new_revid = self.target.last_revision()
 
1159
            result.local_branch = None
 
1160
            result.master_branch = result.target_branch
 
1161
            if run_hooks:
 
1162
                for hook in branch.Branch.hooks['post_pull']:
 
1163
                    hook(result)
 
1164
        return result
 
1165
 
 
1166
 
 
1167
class InterToGitBranch(branch.GenericInterBranch):
 
1168
    """InterBranch implementation that pulls into a Git branch."""
 
1169
 
 
1170
    def __init__(self, source, target):
 
1171
        super(InterToGitBranch, self).__init__(source, target)
 
1172
        self.interrepo = _mod_repository.InterRepository.get(source.repository,
 
1173
                                                             target.repository)
 
1174
 
 
1175
    @staticmethod
 
1176
    def _get_branch_formats_to_test():
 
1177
        try:
 
1178
            default_format = branch.format_registry.get_default()
 
1179
        except AttributeError:
 
1180
            default_format = branch.BranchFormat._default_format
 
1181
        from .remote import RemoteGitBranchFormat
 
1182
        return [
 
1183
            (default_format, LocalGitBranchFormat()),
 
1184
            (default_format, RemoteGitBranchFormat())]
 
1185
 
 
1186
    @classmethod
 
1187
    def is_compatible(self, source, target):
 
1188
        return (not isinstance(source, GitBranch) and
 
1189
                isinstance(target, GitBranch))
 
1190
 
 
1191
    def _get_new_refs(self, stop_revision=None, fetch_tags=None):
 
1192
        if not self.source.is_locked():
 
1193
            raise errors.ObjectNotLocked(self.source)
 
1194
        if stop_revision is None:
 
1195
            (stop_revno, stop_revision) = self.source.last_revision_info()
 
1196
        else:
 
1197
            stop_revno = self.source.revision_id_to_revno(stop_revision)
 
1198
        if not isinstance(stop_revision, bytes):
 
1199
            raise TypeError(stop_revision)
 
1200
        main_ref = self.target.ref
 
1201
        refs = {main_ref: (None, stop_revision)}
 
1202
        if fetch_tags is None:
 
1203
            c = self.source.get_config_stack()
 
1204
            fetch_tags = c.get('branch.fetch_tags')
 
1205
        for name, revid in viewitems(self.source.tags.get_tag_dict()):
 
1206
            if self.source.repository.has_revision(revid):
 
1207
                ref = tag_name_to_ref(name)
 
1208
                if not check_ref_format(ref):
 
1209
                    warning("skipping tag with invalid characters %s (%s)",
 
1210
                            name, ref)
 
1211
                    continue
 
1212
                if fetch_tags:
 
1213
                    # FIXME: Skip tags that are not in the ancestry
 
1214
                    refs[ref] = (None, revid)
 
1215
        return refs, main_ref, (stop_revno, stop_revision)
 
1216
 
 
1217
    def _update_refs(self, result, old_refs, new_refs, overwrite):
 
1218
        mutter("updating refs. old refs: %r, new refs: %r",
 
1219
               old_refs, new_refs)
 
1220
        result.tag_updates = {}
 
1221
        result.tag_conflicts = []
 
1222
        ret = dict(old_refs)
 
1223
 
 
1224
        def ref_equals(refs, ref, git_sha, revid):
 
1225
            try:
 
1226
                value = refs[ref]
 
1227
            except KeyError:
 
1228
                return False
 
1229
            if (value[0] is not None and
 
1230
                git_sha is not None and
 
1231
                    value[0] == git_sha):
 
1232
                return True
 
1233
            if (value[1] is not None and
 
1234
                revid is not None and
 
1235
                    value[1] == revid):
 
1236
                return True
 
1237
            # FIXME: If one side only has the git sha available and the other
 
1238
            # only has the bzr revid, then this will cause us to show a tag as
 
1239
            # updated that hasn't actually been updated.
 
1240
            return False
 
1241
        # FIXME: Check for diverged branches
 
1242
        for ref, (git_sha, revid) in viewitems(new_refs):
 
1243
            if ref_equals(ret, ref, git_sha, revid):
 
1244
                # Already up to date
 
1245
                if git_sha is None:
 
1246
                    git_sha = old_refs[ref][0]
 
1247
                if revid is None:
 
1248
                    revid = old_refs[ref][1]
 
1249
                ret[ref] = new_refs[ref] = (git_sha, revid)
 
1250
            elif ref not in ret or overwrite:
 
1251
                try:
 
1252
                    tag_name = ref_to_tag_name(ref)
 
1253
                except ValueError:
 
1254
                    pass
 
1255
                else:
 
1256
                    result.tag_updates[tag_name] = revid
 
1257
                ret[ref] = (git_sha, revid)
 
1258
            else:
 
1259
                # FIXME: Check diverged
 
1260
                diverged = False
 
1261
                if diverged:
 
1262
                    try:
 
1263
                        name = ref_to_tag_name(ref)
 
1264
                    except ValueError:
 
1265
                        pass
 
1266
                    else:
 
1267
                        result.tag_conflicts.append(
 
1268
                            (name, revid, ret[name][1]))
 
1269
                else:
 
1270
                    ret[ref] = (git_sha, revid)
 
1271
        return ret
 
1272
 
 
1273
    def fetch(self, stop_revision=None, fetch_tags=None, lossy=False,
 
1274
              limit=None):
 
1275
        if stop_revision is None:
 
1276
            stop_revision = self.source.last_revision()
 
1277
        ret = []
 
1278
        if fetch_tags:
 
1279
            for k, v in viewitems(self.source.tags.get_tag_dict()):
 
1280
                ret.append((None, v))
 
1281
        ret.append((None, stop_revision))
 
1282
        try:
 
1283
            self.interrepo.fetch_objects(ret, lossy=lossy, limit=limit)
 
1284
        except NoPushSupport:
 
1285
            raise errors.NoRoundtrippingSupport(self.source, self.target)
 
1286
 
 
1287
    def pull(self, overwrite=False, stop_revision=None, local=False,
 
1288
             possible_transports=None, run_hooks=True):
 
1289
        result = GitBranchPullResult()
 
1290
        result.source_branch = self.source
 
1291
        result.target_branch = self.target
 
1292
        with self.source.lock_read(), self.target.lock_write():
 
1293
            new_refs, main_ref, stop_revinfo = self._get_new_refs(
 
1294
                stop_revision)
 
1295
 
 
1296
            def update_refs(old_refs):
 
1297
                return self._update_refs(result, old_refs, new_refs, overwrite)
 
1298
            try:
 
1299
                result.revidmap, old_refs, new_refs = (
 
1300
                    self.interrepo.fetch_refs(update_refs, lossy=False))
 
1301
            except NoPushSupport:
 
1302
                raise errors.NoRoundtrippingSupport(self.source, self.target)
 
1303
            (old_sha1, result.old_revid) = old_refs.get(
 
1304
                main_ref, (ZERO_SHA, NULL_REVISION))
 
1305
            if result.old_revid is None:
 
1306
                result.old_revid = self.target.lookup_foreign_revision_id(
 
1307
                    old_sha1)
 
1308
            result.new_revid = new_refs[main_ref][1]
 
1309
            result.local_branch = None
 
1310
            result.master_branch = self.target
 
1311
            if run_hooks:
 
1312
                for hook in branch.Branch.hooks['post_pull']:
 
1313
                    hook(result)
 
1314
        return result
 
1315
 
 
1316
    def push(self, overwrite=False, stop_revision=None, lossy=False,
 
1317
             _override_hook_source_branch=None):
 
1318
        result = GitBranchPushResult()
 
1319
        result.source_branch = self.source
 
1320
        result.target_branch = self.target
 
1321
        result.local_branch = None
 
1322
        result.master_branch = result.target_branch
 
1323
        with self.source.lock_read(), self.target.lock_write():
 
1324
            new_refs, main_ref, stop_revinfo = self._get_new_refs(
 
1325
                stop_revision)
 
1326
 
 
1327
            def update_refs(old_refs):
 
1328
                return self._update_refs(result, old_refs, new_refs, overwrite)
 
1329
            try:
 
1330
                result.revidmap, old_refs, new_refs = (
 
1331
                    self.interrepo.fetch_refs(
 
1332
                        update_refs, lossy=lossy, overwrite=overwrite))
 
1333
            except NoPushSupport:
 
1334
                raise errors.NoRoundtrippingSupport(self.source, self.target)
 
1335
            (old_sha1, result.old_revid) = old_refs.get(
 
1336
                main_ref, (ZERO_SHA, NULL_REVISION))
 
1337
            if result.old_revid is None:
 
1338
                result.old_revid = self.target.lookup_foreign_revision_id(
 
1339
                    old_sha1)
 
1340
            result.new_revid = new_refs[main_ref][1]
 
1341
            (result.new_original_revno,
 
1342
                result.new_original_revid) = stop_revinfo
 
1343
            for hook in branch.Branch.hooks['post_push']:
 
1344
                hook(result)
 
1345
        return result
 
1346
 
 
1347
 
 
1348
branch.InterBranch.register_optimiser(InterGitLocalGitBranch)
 
1349
branch.InterBranch.register_optimiser(InterFromGitBranch)
 
1350
branch.InterBranch.register_optimiser(InterToGitBranch)
 
1351
branch.InterBranch.register_optimiser(InterLocalGitRemoteGitBranch)