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branch.py
1
1
# Copyright (C) 2007 Canonical Ltd
 
2
# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>
2
3
#
3
4
# This program is free software; you can redistribute it and/or modify
4
5
# it under the terms of the GNU General Public License as published by
16
17
 
17
18
"""An adapter between a Git Branch and a Bazaar Branch"""
18
19
 
 
20
from dulwich.objects import (
 
21
    Commit,
 
22
    Tag,
 
23
    )
 
24
 
19
25
from bzrlib import (
20
26
    branch,
 
27
    bzrdir,
21
28
    config,
 
29
    errors,
22
30
    repository,
23
31
    revision,
24
32
    tag,
25
 
    )
26
 
from bzrlib.decorators import needs_read_lock
27
 
from bzrlib.trace import mutter
28
 
 
29
 
from bzrlib.plugins.git.foreign import ForeignBranch
30
 
from bzrlib.plugins.git.errors import LightWeightCheckoutsNotSupported
31
 
 
32
 
from dulwich.objects import (
33
 
        Commit,
34
 
        Tag,
35
 
        )
36
 
 
37
 
class GitTagDict(tag.BasicTags):
 
33
    transport,
 
34
    )
 
35
from bzrlib.decorators import (
 
36
    needs_read_lock,
 
37
    )
 
38
from bzrlib.trace import (
 
39
    is_quiet,
 
40
    mutter,
 
41
    )
 
42
 
 
43
from bzrlib.plugins.git import (
 
44
    get_rich_root_format,
 
45
    )
 
46
from bzrlib.plugins.git.config import (
 
47
    GitBranchConfig,
 
48
    )
 
49
from bzrlib.plugins.git.errors import (
 
50
    NoPushSupport,
 
51
    NoSuchRef,
 
52
    )
 
53
 
 
54
from bzrlib.foreign import ForeignBranch
 
55
 
 
56
 
 
57
def extract_tags(refs, mapping):
 
58
    ret = {}
 
59
    for k,v in refs.iteritems():
 
60
        if k.startswith("refs/tags/") and not k.endswith("^{}"):
 
61
            v = refs.get(k+"^{}", v)
 
62
            ret[k[len("refs/tags/"):]] = mapping.revision_id_foreign_to_bzr(v)
 
63
    return ret
 
64
 
 
65
 
 
66
class GitPullResult(branch.PullResult):
 
67
 
 
68
    def _lookup_revno(self, revid):
 
69
        assert isinstance(revid, str), "was %r" % revid
 
70
        # Try in source branch first, it'll be faster
 
71
        return self.target_branch.revision_id_to_revno(revid)
 
72
 
 
73
    @property
 
74
    def old_revno(self):
 
75
        return self._lookup_revno(self.old_revid)
 
76
 
 
77
    @property
 
78
    def new_revno(self):
 
79
        return self._lookup_revno(self.new_revid)
 
80
 
 
81
 
 
82
class LocalGitTagDict(tag.BasicTags):
 
83
    """Dictionary with tags in a local repository."""
38
84
 
39
85
    def __init__(self, branch):
40
86
        self.branch = branch
42
88
 
43
89
    def get_tag_dict(self):
44
90
        ret = {}
45
 
        for k,v in self.repository._git.tags.iteritems():
 
91
        for k,v in self.repository._git.refs.as_dict("refs/tags").iteritems():
46
92
            obj = self.repository._git.get_object(v)
47
93
            while isinstance(obj, Tag):
48
94
                v = obj.object[1]
49
95
                obj = self.repository._git.get_object(v)
50
96
            if not isinstance(obj, Commit):
51
 
                mutter("Tag %s points at object %r that is not a commit, ignoring", k, obj)
 
97
                mutter("Tag %s points at object %r that is not a commit, "
 
98
                       "ignoring", k, obj)
52
99
                continue
53
100
            ret[k] = self.branch.mapping.revision_id_foreign_to_bzr(v)
54
101
        return ret
55
102
 
56
103
    def set_tag(self, name, revid):
57
 
        self.repository._git.tags[name] = revid
58
 
 
59
 
 
60
 
class GitBranchConfig(config.BranchConfig):
61
 
    """BranchConfig that uses locations.conf in place of branch.conf"""
62
 
 
63
 
    def __init__(self, branch):
64
 
        config.BranchConfig.__init__(self, branch)
65
 
        # do not provide a BranchDataConfig
66
 
        self.option_sources = self.option_sources[0], self.option_sources[2]
67
 
 
68
 
    def set_user_option(self, name, value, store=config.STORE_BRANCH, warn_masked=False):
69
 
        """Force local to True"""
70
 
        config.BranchConfig.set_user_option(self, name, value, store=config.STORE_LOCATION, warn_masked=warn_masked)
 
104
        self.repository._git.refs["refs/tags/%s" % name], _ = \
 
105
            self.branch.mapping.revision_id_bzr_to_foreign(revid)
 
106
 
 
107
 
 
108
class DictTagDict(LocalGitTagDict):
 
109
 
 
110
 
 
111
    def __init__(self, branch, tags):
 
112
        super(DictTagDict, self).__init__(branch)
 
113
        self._tags = tags
 
114
 
 
115
    def get_tag_dict(self):
 
116
        return self._tags
 
117
 
71
118
 
72
119
 
73
120
class GitBranchFormat(branch.BranchFormat):
78
125
    def supports_tags(self):
79
126
        return True
80
127
 
 
128
    def make_tags(self, branch):
 
129
        if getattr(branch.repository, "get_refs", None) is not None:
 
130
            from bzrlib.plugins.git.remote import RemoteGitTagDict
 
131
            return RemoteGitTagDict(branch)
 
132
        else:
 
133
            return LocalGitTagDict(branch)
 
134
 
81
135
 
82
136
class GitBranch(ForeignBranch):
83
137
    """An adapter to git repositories for bzr Branch objects."""
84
138
 
85
 
    def __init__(self, bzrdir, repository, name, head, lockfiles):
 
139
    def __init__(self, bzrdir, repository, name, lockfiles, tagsdict=None):
86
140
        self.repository = repository
87
 
        super(GitBranch, self).__init__(repository.get_mapping())
 
141
        self._format = GitBranchFormat()
88
142
        self.control_files = lockfiles
89
143
        self.bzrdir = bzrdir
 
144
        super(GitBranch, self).__init__(repository.get_mapping())
 
145
        if tagsdict is not None:
 
146
            self.tags = DictTagDict(self, tagsdict)
90
147
        self.name = name
91
 
        self.head = head
 
148
        self._head = None
92
149
        self.base = bzrdir.transport.base
93
 
        self._format = GitBranchFormat()
94
 
 
95
 
    def dpull(self, source, stop_revision=None):
96
 
        if stop_revision is None:
97
 
            stop_revision = source.last_revision()
98
 
        # FIXME: Check for diverged branches
99
 
        revidmap = self.repository.dfetch(source.repository, stop_revision)
100
 
        self.head, self.mapping = self.mapping.revision_id_bzr_to_foreign(revidmap[stop_revision])
101
 
        return revidmap
 
150
 
 
151
    def _get_checkout_format(self):
 
152
        """Return the most suitable metadir for a checkout of this branch.
 
153
        Weaves are used if this branch's repository uses weaves.
 
154
        """
 
155
        return get_rich_root_format()
 
156
 
 
157
    def get_child_submit_format(self):
 
158
        """Return the preferred format of submissions to this branch."""
 
159
        ret = self.get_config().get_user_option("child_submit_format")
 
160
        if ret is not None:
 
161
            return ret
 
162
        return "git"
 
163
 
 
164
    def _get_nick(self, local=False, possible_master_transports=None):
 
165
        """Find the nick name for this branch.
 
166
 
 
167
        :return: Branch nick
 
168
        """
 
169
        return self.name
 
170
 
 
171
    def _set_nick(self, nick):
 
172
        raise NotImplementedError
 
173
 
 
174
    nick = property(_get_nick, _set_nick)
 
175
 
 
176
    def __repr__(self):
 
177
        return "%s(%r, %r)" % (self.__class__.__name__, self.repository.base, self.name)
 
178
 
 
179
    def generate_revision_history(self, revid, old_revid=None):
 
180
        # FIXME: Check that old_revid is in the ancestry of revid
 
181
        newhead, self.mapping = self.mapping.revision_id_bzr_to_foreign(revid)
 
182
        self._set_head(newhead)
102
183
 
103
184
    def lock_write(self):
104
185
        self.control_files.lock_write()
109
190
 
110
191
    def get_parent(self):
111
192
        """See Branch.get_parent()."""
 
193
        # FIXME: Set "origin" url from .git/config ?
112
194
        return None
113
195
 
114
196
    def set_parent(self, url):
 
197
        # FIXME: Set "origin" url in .git/config ?
115
198
        pass
116
199
 
117
200
    def lock_read(self):
118
201
        self.control_files.lock_read()
119
202
 
 
203
    def is_locked(self):
 
204
        return self.control_files.is_locked()
 
205
 
120
206
    def unlock(self):
121
207
        self.control_files.unlock()
122
208
 
123
209
    def get_physical_lock_status(self):
124
210
        return False
125
211
 
126
 
 
127
 
class LocalGitBranch(GitBranch):
128
 
 
129
212
    @needs_read_lock
130
213
    def last_revision(self):
131
214
        # perhaps should escape this ?
133
216
            return revision.NULL_REVISION
134
217
        return self.mapping.revision_id_foreign_to_bzr(self.head)
135
218
 
136
 
    def create_checkout(self, to_location, revision_id=None, 
137
 
                        lightweight=False, accelerator_tree=None, hardlink=False):
 
219
    def _basic_push(self, target, overwrite=False, stop_revision=None):
 
220
        return branch.InterBranch.get(self, target)._basic_push(
 
221
            overwrite, stop_revision)
 
222
 
 
223
 
 
224
class LocalGitBranch(GitBranch):
 
225
    """A local Git branch."""
 
226
 
 
227
    def create_checkout(self, to_location, revision_id=None, lightweight=False,
 
228
        accelerator_tree=None, hardlink=False):
138
229
        if lightweight:
139
 
            raise LightWeightCheckoutsNotSupported()
140
 
        return self._create_heavyweight_checkout(to_location, revision_id, hardlink)
 
230
            t = transport.get_transport(to_location)
 
231
            t.ensure_base()
 
232
            format = self._get_checkout_format()
 
233
            checkout = format.initialize_on_transport(t)
 
234
            from_branch = branch.BranchReferenceFormat().initialize(checkout, 
 
235
                self)
 
236
            tree = checkout.create_workingtree(revision_id,
 
237
                from_branch=from_branch, hardlink=hardlink)
 
238
            return tree
 
239
        else:
 
240
            return self._create_heavyweight_checkout(to_location, revision_id,
 
241
            hardlink)
141
242
 
142
243
    def _create_heavyweight_checkout(self, to_location, revision_id=None, 
143
244
                                     hardlink=False):
148
249
        :param hardlink: Whether to hardlink
149
250
        :return: WorkingTree object of checkout.
150
251
        """
151
 
        checkout_branch = BzrDir.create_branch_convenience(
 
252
        checkout_branch = bzrdir.BzrDir.create_branch_convenience(
152
253
            to_location, force_new_tree=False, format=get_rich_root_format())
153
254
        checkout = checkout_branch.bzrdir
154
255
        checkout_branch.bind(self)
157
258
        checkout_branch.pull(self, stop_revision=revision_id)
158
259
        return checkout.create_workingtree(revision_id, hardlink=hardlink)
159
260
 
160
 
    def _make_tags(self):
161
 
        return GitTagDict(self)
162
 
 
163
261
    def _gen_revision_history(self):
164
262
        if self.head is None:
165
263
            return []
166
 
        ret = list(self.repository.iter_reverse_revision_history(self.last_revision()))
 
264
        ret = list(self.repository.iter_reverse_revision_history(
 
265
            self.last_revision()))
167
266
        ret.reverse()
168
267
        return ret
169
268
 
 
269
    def _get_head(self):
 
270
        try:
 
271
            return self.repository._git.ref(self.name)
 
272
        except KeyError:
 
273
            return None
 
274
 
 
275
    def set_last_revision_info(self, revno, revid):
 
276
        self.set_last_revision(revid)
 
277
 
 
278
    def set_last_revision(self, revid):
 
279
        (newhead, self.mapping) = self.mapping.revision_id_bzr_to_foreign(
 
280
                revid)
 
281
        self.head = newhead
 
282
 
 
283
    def _set_head(self, value):
 
284
        self._head = value
 
285
        self.repository._git.refs[self.name] = self._head
 
286
        self._clear_cached_state()
 
287
 
 
288
    head = property(_get_head, _set_head)
 
289
 
170
290
    def get_config(self):
171
291
        return GitBranchConfig(self)
172
292
 
183
303
    def supports_tags(self):
184
304
        return True
185
305
 
186
 
    def sprout(self, to_bzrdir, revision_id=None):
187
 
        """See Branch.sprout()."""
188
 
        result = to_bzrdir.create_branch()
189
 
        self.copy_content_into(result, revision_id=revision_id)
190
 
        result.set_parent(self.bzrdir.root_transport.base)
191
 
        return result
192
 
 
193
 
 
194
 
class InterGitGenericBranch(branch.InterBranch):
 
306
 
 
307
class GitBranchPullResult(branch.PullResult):
 
308
 
 
309
    def report(self, to_file):
 
310
        if not is_quiet():
 
311
            if self.old_revid == self.new_revid:
 
312
                to_file.write('No revisions to pull.\n')
 
313
            else:
 
314
                to_file.write('Now on revision %d (git sha: %s).\n' % 
 
315
                        (self.new_revno, self.new_git_head))
 
316
        self._show_tag_conficts(to_file)
 
317
 
 
318
 
 
319
class GitBranchPushResult(branch.BranchPushResult):
 
320
 
 
321
    def _lookup_revno(self, revid):
 
322
        assert isinstance(revid, str), "was %r" % revid
 
323
        # Try in source branch first, it'll be faster
 
324
        try:
 
325
            return self.source_branch.revision_id_to_revno(revid)
 
326
        except errors.NoSuchRevision:
 
327
            # FIXME: Check using graph.find_distance_to_null() ?
 
328
            return self.target_branch.revision_id_to_revno(revid)
 
329
 
 
330
    @property
 
331
    def old_revno(self):
 
332
        return self._lookup_revno(self.old_revid)
 
333
 
 
334
    @property
 
335
    def new_revno(self):
 
336
        return self._lookup_revno(self.new_revid)
 
337
 
 
338
 
 
339
class InterFromGitBranch(branch.GenericInterBranch):
 
340
    """InterBranch implementation that pulls from Git into bzr."""
195
341
 
196
342
    @classmethod
197
343
    def is_compatible(self, source, target):
198
 
        return isinstance(source, GitBranch)
 
344
        return (isinstance(source, GitBranch) and 
 
345
                not isinstance(target, GitBranch))
199
346
 
200
347
    def update_revisions(self, stop_revision=None, overwrite=False,
201
348
        graph=None):
202
349
        """See InterBranch.update_revisions()."""
203
 
        # TODO: stop_revision, overwrite
204
 
        interrepo = repository.InterRepository.get(self.source.repository, self.target.repository)
 
350
        interrepo = repository.InterRepository.get(self.source.repository, 
 
351
            self.target.repository)
 
352
        self._head = None
205
353
        self._last_revid = None
206
354
        def determine_wants(heads):
207
355
            if not self.source.name in heads:
208
 
                raise BzrError("No such remote branch '%s', found: %r" % (
209
 
                    self.source.name, heads.keys()))
210
 
            head = heads[self.source.name]
211
 
            self._last_revid = self.source.mapping.revision_id_foreign_to_bzr(head)
 
356
                raise NoSuchRef(self.source.name, heads.keys())
 
357
            if stop_revision is not None:
 
358
                self._last_revid = stop_revision
 
359
                self._head, mapping = self.source.repository.lookup_git_revid(
 
360
                    stop_revision)
 
361
            else:
 
362
                self._head = heads[self.source.name]
 
363
                self._last_revid = \
 
364
                    self.source.mapping.revision_id_foreign_to_bzr(self._head)
212
365
            if self.target.repository.has_revision(self._last_revid):
213
366
                return []
214
 
            return [head]
 
367
            return [self._head]
215
368
        interrepo.fetch_objects(determine_wants, self.source.mapping)
216
 
        self.target.generate_revision_history(self._last_revid)
217
 
 
218
 
 
219
 
branch.InterBranch.register_optimiser(InterGitGenericBranch)
 
369
        if overwrite:
 
370
            prev_last_revid = None
 
371
        else:
 
372
            prev_last_revid = self.target.last_revision()
 
373
        self.target.generate_revision_history(self._last_revid, prev_last_revid)
 
374
 
 
375
    def pull(self, overwrite=False, stop_revision=None,
 
376
             possible_transports=None, _hook_master=None, run_hooks=True,
 
377
             _override_hook_target=None, local=False):
 
378
        """See Branch.pull.
 
379
 
 
380
        :param _hook_master: Private parameter - set the branch to
 
381
            be supplied as the master to pull hooks.
 
382
        :param run_hooks: Private parameter - if false, this branch
 
383
            is being called because it's the master of the primary branch,
 
384
            so it should not run its hooks.
 
385
        :param _override_hook_target: Private parameter - set the branch to be
 
386
            supplied as the target_branch to pull hooks.
 
387
        """
 
388
        # This type of branch can't be bound.
 
389
        if local:
 
390
            raise errors.LocalRequiresBoundBranch()
 
391
        result = GitBranchPullResult()
 
392
        result.source_branch = self.source
 
393
        if _override_hook_target is None:
 
394
            result.target_branch = self.target
 
395
        else:
 
396
            result.target_branch = _override_hook_target
 
397
        self.source.lock_read()
 
398
        try:
 
399
            # We assume that during 'pull' the target repository is closer than
 
400
            # the source one.
 
401
            graph = self.target.repository.get_graph(self.source.repository)
 
402
            result.old_revno, result.old_revid = \
 
403
                self.target.last_revision_info()
 
404
            self.update_revisions(stop_revision, overwrite=overwrite, 
 
405
                graph=graph)
 
406
            result.new_git_head = self._head
 
407
            result.tag_conflicts = self.source.tags.merge_to(self.target.tags,
 
408
                overwrite)
 
409
            result.new_revno, result.new_revid = self.target.last_revision_info()
 
410
            if _hook_master:
 
411
                result.master_branch = _hook_master
 
412
                result.local_branch = result.target_branch
 
413
            else:
 
414
                result.master_branch = result.target_branch
 
415
                result.local_branch = None
 
416
            if run_hooks:
 
417
                for hook in branch.Branch.hooks['post_pull']:
 
418
                    hook(result)
 
419
        finally:
 
420
            self.source.unlock()
 
421
        return result
 
422
 
 
423
    def _basic_push(self, overwrite=False, stop_revision=None):
 
424
        result = branch.BranchPushResult()
 
425
        result.source_branch = self.source
 
426
        result.target_branch = self.target
 
427
        graph = self.target.repository.get_graph(self.source.repository)
 
428
        result.old_revno, result.old_revid = self.target.last_revision_info()
 
429
        self.update_revisions(stop_revision, overwrite=overwrite, 
 
430
            graph=graph)
 
431
        result.new_git_head = self._head
 
432
        result.tag_conflicts = self.source.tags.merge_to(self.target.tags,
 
433
            overwrite)
 
434
        result.new_revno, result.new_revid = self.target.last_revision_info()
 
435
        return result
 
436
 
 
437
 
 
438
class InterGitBranch(branch.GenericInterBranch):
 
439
    """InterBranch implementation that pulls between Git branches."""
 
440
 
 
441
 
 
442
class InterGitLocalRemoteBranch(InterGitBranch):
 
443
    """InterBranch that copies from a local to a remote git branch."""
 
444
 
 
445
    @classmethod
 
446
    def is_compatible(self, source, target):
 
447
        from bzrlib.plugins.git.remote import RemoteGitBranch
 
448
        return (isinstance(source, LocalGitBranch) and 
 
449
                isinstance(target, RemoteGitBranch))
 
450
 
 
451
    def _basic_push(self, overwrite=False, stop_revision=None):
 
452
        result = GitBranchPushResult()
 
453
        result.source_branch = self.source
 
454
        result.target_branch = self.target
 
455
        if stop_revision is None:
 
456
            stop_revision = self.source.last_revision()
 
457
        # FIXME: Check for diverged branches
 
458
        def get_changed_refs(old_refs):
 
459
            result.old_revid = self.target.mapping.revision_id_foreign_to_bzr(old_refs.get("refs/heads/master", "0" * 40))
 
460
            refs = { "refs/heads/master": self.source.repository.lookup_git_revid(stop_revision)[0] }
 
461
            result.new_revid = stop_revision
 
462
            for name, sha in self.source.repository._git.refs.as_dict("refs/tags").iteritems():
 
463
                refs["refs/tags/%s" % name] = sha
 
464
            return refs
 
465
        self.target.repository.send_pack(get_changed_refs, 
 
466
                self.source.repository._git.object_store.generate_pack_contents)
 
467
        return result
 
468
 
 
469
 
 
470
class InterGitRemoteLocalBranch(InterGitBranch):
 
471
    """InterBranch that copies from a remote to a local git branch."""
 
472
 
 
473
    @classmethod
 
474
    def is_compatible(self, source, target):
 
475
        from bzrlib.plugins.git.remote import RemoteGitBranch
 
476
        return (isinstance(source, RemoteGitBranch) and 
 
477
                isinstance(target, LocalGitBranch))
 
478
 
 
479
    def _basic_push(self, overwrite=False, stop_revision=None):
 
480
        result = branch.BranchPushResult()
 
481
        result.source_branch = self.source
 
482
        result.target_branch = self.target
 
483
        result.old_revid = self.target.last_revision()
 
484
        refs, stop_revision = self.update_refs(stop_revision)
 
485
        self.target.generate_revision_history(stop_revision, result.old_revid)
 
486
        self.update_tags(refs)
 
487
        result.new_revid = self.target.last_revision()
 
488
        return result
 
489
 
 
490
    def update_tags(self, refs):
 
491
        for name, revid in extract_tags(refs, self.target.mapping).iteritems():
 
492
            self.target.tags.set_tag(name, revid)
 
493
 
 
494
    def update_refs(self, stop_revision=None):
 
495
        interrepo = repository.InterRepository.get(self.source.repository, 
 
496
            self.target.repository)
 
497
        if stop_revision is None:
 
498
            refs = interrepo.fetch_refs(branches=["HEAD"])
 
499
            stop_revision = self.target.mapping.revision_id_foreign_to_bzr(refs["HEAD"])
 
500
        else:
 
501
            refs = interrepo.fetch_refs(revision_id=stop_revision)
 
502
        return refs, stop_revision
 
503
 
 
504
    def pull(self, stop_revision=None, overwrite=False, 
 
505
        possible_transports=None, local=False):
 
506
        # This type of branch can't be bound.
 
507
        if local:
 
508
            raise errors.LocalRequiresBoundBranch()
 
509
        result = GitPullResult()
 
510
        result.source_branch = self.source
 
511
        result.target_branch = self.target
 
512
        result.old_revid = self.target.last_revision()
 
513
        refs, stop_revision = self.update_refs(stop_revision)
 
514
        self.target.generate_revision_history(stop_revision, result.old_revid)
 
515
        self.update_tags(refs)
 
516
        result.new_revid = self.target.last_revision()
 
517
        return result
 
518
 
 
519
    
 
520
class InterToGitBranch(branch.InterBranch):
 
521
    """InterBranch implementation that pulls from Git into bzr."""
 
522
 
 
523
    @classmethod
 
524
    def is_compatible(self, source, target):
 
525
        return (not isinstance(source, GitBranch) and 
 
526
                isinstance(target, GitBranch))
 
527
 
 
528
    def update_revisions(self, *args, **kwargs):
 
529
        raise NoPushSupport()
 
530
 
 
531
    def push(self, overwrite=True, stop_revision=None, 
 
532
             _override_hook_source_branch=None):
 
533
        raise NoPushSupport()
 
534
 
 
535
    def lossy_push(self, stop_revision=None):
 
536
        result = GitBranchPushResult()
 
537
        result.source_branch = self.source
 
538
        result.target_branch = self.target
 
539
        try:
 
540
            result.old_revid = self.target.last_revision()
 
541
        except NoSuchRef:
 
542
            result.old_revid = revision.NULL_REVISION
 
543
        if stop_revision is None:
 
544
            stop_revision = self.source.last_revision()
 
545
        # FIXME: Check for diverged branches
 
546
        refs = { "refs/heads/master": stop_revision }
 
547
        for name, revid in self.source.tags.get_tag_dict().iteritems():
 
548
            if self.source.repository.has_revision(revid):
 
549
                refs["refs/tags/%s" % name] = revid
 
550
        revidmap, new_refs = self.target.repository.dfetch_refs(
 
551
            self.source.repository, refs)
 
552
        if revidmap != {}:
 
553
            self.target.generate_revision_history(revidmap[stop_revision])
 
554
            result.new_revid = revidmap[stop_revision]
 
555
        else:
 
556
            result.new_revid = result.old_revid
 
557
        result.revidmap = revidmap
 
558
        return result
 
559
 
 
560
 
 
561
branch.InterBranch.register_optimiser(InterGitRemoteLocalBranch)
 
562
branch.InterBranch.register_optimiser(InterFromGitBranch)
 
563
branch.InterBranch.register_optimiser(InterToGitBranch)
 
564
branch.InterBranch.register_optimiser(InterGitLocalRemoteBranch)