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  • Committer: Jelmer Vernooij
  • Date: 2020-06-23 01:02:30 UTC
  • mfrom: (7490.40.27 work)
  • mto: This revision was merged to the branch mainline in revision 7517.
  • Revision ID: jelmer@jelmer.uk-20200623010230-62nnywznmb76h6ut
Merge lp:brz/3.1.

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breezy/git/dir.py
1
1
# Copyright (C) 2007 Canonical Ltd
2
 
# Copyright (C) 2010 Jelmer Vernooij
 
2
# Copyright (C) 2010-2018 Jelmer Vernooij
3
3
#
4
4
# This program is free software; you can redistribute it and/or modify
5
5
# it under the terms of the GNU General Public License as published by
13
13
#
14
14
# You should have received a copy of the GNU General Public License
15
15
# along with this program; if not, write to the Free Software
16
 
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
16
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
17
 
18
18
"""An adapter between a Git control dir and a Bazaar ControlDir."""
19
19
 
20
 
from bzrlib import (
21
 
    errors as bzr_errors,
22
 
    lockable_files,
 
20
import contextlib
 
21
 
 
22
from .. import (
 
23
    branch as _mod_branch,
 
24
    errors as brz_errors,
 
25
    trace,
 
26
    osutils,
23
27
    urlutils,
24
 
    version_info as bzrlib_version,
25
 
    )
26
 
 
27
 
LockWarner = getattr(lockable_files, "_LockWarner", None)
28
 
 
29
 
from bzrlib.plugins.git import (
30
 
    BareLocalGitControlDirFormat,
31
 
    LocalGitControlDirFormat,
32
 
    )
33
 
try:
34
 
    from bzrlib.controldir import (
35
 
        ControlDir,
36
 
        format_registry,
37
 
        )
38
 
except ImportError:
39
 
    # bzr < 2.3
40
 
    from bzrlib.bzrdir import (
41
 
        BzrDir,
42
 
        format_registry,
43
 
        )
44
 
    ControlDir = BzrDir
45
 
 
46
 
 
47
 
class GitLock(object):
48
 
    """A lock that thunks through to Git."""
49
 
 
50
 
    def lock_write(self, token=None):
51
 
        pass
52
 
 
53
 
    def lock_read(self):
54
 
        pass
55
 
 
56
 
    def unlock(self):
57
 
        pass
58
 
 
59
 
    def peek(self):
60
 
        pass
61
 
 
62
 
    def validate_token(self, token):
63
 
        pass
64
 
 
65
 
    def break_lock(self):
66
 
        pass
67
 
 
68
 
 
69
 
class GitLockableFiles(lockable_files.LockableFiles):
70
 
    """Git specific lockable files abstraction."""
71
 
 
72
 
    def __init__(self, transport, lock):
73
 
        self._lock = lock
74
 
        self._transaction = None
75
 
        self._lock_mode = None
76
 
        self._transport = transport
77
 
        if LockWarner is None:
78
 
            # Bzr 1.13
79
 
            self._lock_count = 0
80
 
        else:
81
 
            self._lock_warner = LockWarner(repr(self))
 
28
    )
 
29
from ..transport import (
 
30
    do_catching_redirections,
 
31
    get_transport_from_path,
 
32
    )
 
33
 
 
34
from ..controldir import (
 
35
    BranchReferenceLoop,
 
36
    ControlDir,
 
37
    ControlDirFormat,
 
38
    format_registry,
 
39
    RepositoryAcquisitionPolicy,
 
40
    )
 
41
 
 
42
from .push import (
 
43
    GitPushResult,
 
44
    )
 
45
from .transportgit import (
 
46
    OBJECTDIR,
 
47
    TransportObjectStore,
 
48
    )
82
49
 
83
50
 
84
51
class GitDirConfig(object):
87
54
        return None
88
55
 
89
56
    def set_default_stack_on(self, value):
90
 
        raise bzr_errors.BzrError("Cannot set configuration")
 
57
        raise brz_errors.BzrError("Cannot set configuration")
 
58
 
 
59
 
 
60
class GitControlDirFormat(ControlDirFormat):
 
61
 
 
62
    colocated_branches = True
 
63
    fixed_components = True
 
64
 
 
65
    def __eq__(self, other):
 
66
        return type(self) == type(other)
 
67
 
 
68
    def is_supported(self):
 
69
        return True
 
70
 
 
71
    def network_name(self):
 
72
        return b"git"
 
73
 
 
74
 
 
75
class UseExistingRepository(RepositoryAcquisitionPolicy):
 
76
    """A policy of reusing an existing repository"""
 
77
 
 
78
    def __init__(self, repository, stack_on=None, stack_on_pwd=None,
 
79
                 require_stacking=False):
 
80
        """Constructor.
 
81
 
 
82
        :param repository: The repository to use.
 
83
        :param stack_on: A location to stack on
 
84
        :param stack_on_pwd: If stack_on is relative, the location it is
 
85
            relative to.
 
86
        """
 
87
        super(UseExistingRepository, self).__init__(
 
88
            stack_on, stack_on_pwd, require_stacking)
 
89
        self._repository = repository
 
90
 
 
91
    def acquire_repository(self, make_working_trees=None, shared=False,
 
92
                           possible_transports=None):
 
93
        """Implementation of RepositoryAcquisitionPolicy.acquire_repository
 
94
 
 
95
        Returns an existing repository to use.
 
96
        """
 
97
        return self._repository, False
91
98
 
92
99
 
93
100
class GitDir(ControlDir):
100
107
        return False
101
108
 
102
109
    def break_lock(self):
103
 
        pass
 
110
        # There are no global locks, so nothing to break.
 
111
        raise NotImplementedError(self.break_lock)
104
112
 
105
113
    def cloning_metadir(self, stacked=False):
106
 
        return format_registry.make_bzrdir("default")
107
 
 
108
 
    def _branch_name_to_ref(self, name):
109
 
        raise NotImplementedError(self._branch_name_to_ref)
110
 
 
111
 
    if bzrlib_version >= (2, 2):
112
 
        def open_branch(self, name=None, unsupported=False, 
113
 
            ignore_fallbacks=None):
114
 
            return self._open_branch(name=name,
115
 
                ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
116
 
    else:
117
 
        def open_branch(self, ignore_fallbacks=None, unsupported=False):
118
 
            return self._open_branch(name=None,
119
 
                ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
 
114
        return format_registry.make_controldir("git")
 
115
 
 
116
    def checkout_metadir(self, stacked=False):
 
117
        return format_registry.make_controldir("git")
 
118
 
 
119
    def _get_selected_ref(self, branch, ref=None):
 
120
        if ref is not None and branch is not None:
 
121
            raise brz_errors.BzrError("can't specify both ref and branch")
 
122
        if ref is not None:
 
123
            return ref
 
124
        if branch is not None:
 
125
            from .refs import branch_name_to_ref
 
126
            return branch_name_to_ref(branch)
 
127
        segment_parameters = getattr(
 
128
            self.user_transport, "get_segment_parameters", lambda: {})()
 
129
        ref = segment_parameters.get("ref")
 
130
        if ref is not None:
 
131
            return urlutils.unquote_to_bytes(ref)
 
132
        if branch is None and getattr(self, "_get_selected_branch", False):
 
133
            branch = self._get_selected_branch()
 
134
            if branch is not None:
 
135
                from .refs import branch_name_to_ref
 
136
                return branch_name_to_ref(branch)
 
137
        return b"HEAD"
120
138
 
121
139
    def get_config(self):
122
140
        return GitDirConfig()
123
141
 
 
142
    def _available_backup_name(self, base):
 
143
        return osutils.available_backup_name(base, self.root_transport.has)
 
144
 
 
145
    def sprout(self, url, revision_id=None, force_new_repo=False,
 
146
               recurse='down', possible_transports=None,
 
147
               accelerator_tree=None, hardlink=False, stacked=False,
 
148
               source_branch=None, create_tree_if_local=True):
 
149
        from ..repository import InterRepository
 
150
        from ..transport.local import LocalTransport
 
151
        from ..transport import get_transport
 
152
        target_transport = get_transport(url, possible_transports)
 
153
        target_transport.ensure_base()
 
154
        cloning_format = self.cloning_metadir()
 
155
        # Create/update the result branch
 
156
        try:
 
157
            result = ControlDir.open_from_transport(target_transport)
 
158
        except brz_errors.NotBranchError:
 
159
            result = cloning_format.initialize_on_transport(target_transport)
 
160
        source_branch = self.open_branch()
 
161
        source_repository = self.find_repository()
 
162
        try:
 
163
            result_repo = result.find_repository()
 
164
        except brz_errors.NoRepositoryPresent:
 
165
            result_repo = result.create_repository()
 
166
        if stacked:
 
167
            raise _mod_branch.UnstackableBranchFormat(
 
168
                self._format, self.user_url)
 
169
        interrepo = InterRepository.get(source_repository, result_repo)
 
170
 
 
171
        if revision_id is not None:
 
172
            determine_wants = interrepo.get_determine_wants_revids(
 
173
                [revision_id], include_tags=True)
 
174
        else:
 
175
            determine_wants = interrepo.determine_wants_all
 
176
        interrepo.fetch_objects(determine_wants=determine_wants,
 
177
                                mapping=source_branch.mapping)
 
178
        result_branch = source_branch.sprout(
 
179
            result, revision_id=revision_id, repository=result_repo)
 
180
        if (create_tree_if_local and
 
181
            result.open_branch(name="").name == result_branch.name and
 
182
            isinstance(target_transport, LocalTransport) and
 
183
                (result_repo is None or result_repo.make_working_trees())):
 
184
            wt = result.create_workingtree(
 
185
                accelerator_tree=accelerator_tree,
 
186
                hardlink=hardlink, from_branch=result_branch)
 
187
        else:
 
188
            wt = None
 
189
        if recurse == 'down':
 
190
            with contextlib.ExitStack() as stack:
 
191
                basis = None
 
192
                if wt is not None:
 
193
                    basis = wt.basis_tree()
 
194
                elif result_branch is not None:
 
195
                    basis = result_branch.basis_tree()
 
196
                elif source_branch is not None:
 
197
                    basis = source_branch.basis_tree()
 
198
                if basis is not None:
 
199
                    stack.enter_context(basis.lock_read())
 
200
                    subtrees = basis.iter_references()
 
201
                else:
 
202
                    subtrees = []
 
203
                for path in subtrees:
 
204
                    target = urlutils.join(url, urlutils.escape(path))
 
205
                    sublocation = wt.reference_parent(
 
206
                        path, possible_transports=possible_transports)
 
207
                    if sublocation is None:
 
208
                        trace.warning(
 
209
                            'Ignoring nested tree %s, parent location unknown.',
 
210
                            path)
 
211
                        continue
 
212
                    sublocation.controldir.sprout(
 
213
                        target, basis.get_reference_revision(path),
 
214
                        force_new_repo=force_new_repo, recurse=recurse,
 
215
                        stacked=stacked)
 
216
        return result
 
217
 
 
218
    def clone_on_transport(self, transport, revision_id=None,
 
219
                           force_new_repo=False, preserve_stacking=False,
 
220
                           stacked_on=None, create_prefix=False,
 
221
                           use_existing_dir=True, no_tree=False,
 
222
                           tag_selector=None):
 
223
        """See ControlDir.clone_on_transport."""
 
224
        from ..repository import InterRepository
 
225
        from .mapping import default_mapping
 
226
        from ..transport.local import LocalTransport
 
227
        if stacked_on is not None:
 
228
            raise _mod_branch.UnstackableBranchFormat(
 
229
                self._format, self.user_url)
 
230
        if no_tree:
 
231
            format = BareLocalGitControlDirFormat()
 
232
        else:
 
233
            format = LocalGitControlDirFormat()
 
234
        (target_repo, target_controldir, stacking,
 
235
         repo_policy) = format.initialize_on_transport_ex(
 
236
            transport, use_existing_dir=use_existing_dir,
 
237
            create_prefix=create_prefix,
 
238
            force_new_repo=force_new_repo)
 
239
        target_repo = target_controldir.find_repository()
 
240
        target_git_repo = target_repo._git
 
241
        source_repo = self.find_repository()
 
242
        interrepo = InterRepository.get(source_repo, target_repo)
 
243
        if revision_id is not None:
 
244
            determine_wants = interrepo.get_determine_wants_revids(
 
245
                [revision_id], include_tags=True, tag_selector=tag_selector)
 
246
        else:
 
247
            determine_wants = interrepo.determine_wants_all
 
248
        (pack_hint, _, refs) = interrepo.fetch_objects(determine_wants,
 
249
                                                       mapping=default_mapping)
 
250
        for name, val in refs.items():
 
251
            target_git_repo.refs[name] = val
 
252
        result_dir = LocalGitDir(transport, target_git_repo, format)
 
253
        if revision_id is not None:
 
254
            result_dir.open_branch().set_last_revision(revision_id)
 
255
        if not no_tree and isinstance(result_dir.root_transport, LocalTransport):
 
256
            if result_dir.open_repository().make_working_trees():
 
257
                try:
 
258
                    local_wt = self.open_workingtree()
 
259
                except brz_errors.NoWorkingTree:
 
260
                    pass
 
261
                except brz_errors.NotLocalUrl:
 
262
                    result_dir.create_workingtree(revision_id=revision_id)
 
263
                else:
 
264
                    local_wt.clone(result_dir, revision_id=revision_id)
 
265
 
 
266
        return result_dir
 
267
 
 
268
    def find_repository(self):
 
269
        """Find the repository that should be used.
 
270
 
 
271
        This does not require a branch as we use it to find the repo for
 
272
        new branches as well as to hook existing branches up to their
 
273
        repository.
 
274
        """
 
275
        return self._gitrepository_class(self._find_commondir())
 
276
 
 
277
    def get_refs_container(self):
 
278
        """Retrieve the refs container.
 
279
        """
 
280
        raise NotImplementedError(self.get_refs_container)
 
281
 
 
282
    def determine_repository_policy(self, force_new_repo=False, stack_on=None,
 
283
                                    stack_on_pwd=None, require_stacking=False):
 
284
        """Return an object representing a policy to use.
 
285
 
 
286
        This controls whether a new repository is created, and the format of
 
287
        that repository, or some existing shared repository used instead.
 
288
 
 
289
        If stack_on is supplied, will not seek a containing shared repo.
 
290
 
 
291
        :param force_new_repo: If True, require a new repository to be created.
 
292
        :param stack_on: If supplied, the location to stack on.  If not
 
293
            supplied, a default_stack_on location may be used.
 
294
        :param stack_on_pwd: If stack_on is relative, the location it is
 
295
            relative to.
 
296
        """
 
297
        return UseExistingRepository(self.find_repository())
 
298
 
 
299
    def branch_names(self):
 
300
        from .refs import ref_to_branch_name
 
301
        ret = []
 
302
        for ref in self.get_refs_container().keys():
 
303
            try:
 
304
                branch_name = ref_to_branch_name(ref)
 
305
            except UnicodeDecodeError:
 
306
                trace.warning("Ignoring branch %r with unicode error ref", ref)
 
307
                continue
 
308
            except ValueError:
 
309
                continue
 
310
            ret.append(branch_name)
 
311
        return ret
 
312
 
 
313
    def get_branches(self):
 
314
        from .refs import ref_to_branch_name
 
315
        ret = {}
 
316
        for ref in self.get_refs_container().keys():
 
317
            try:
 
318
                branch_name = ref_to_branch_name(ref)
 
319
            except UnicodeDecodeError:
 
320
                trace.warning("Ignoring branch %r with unicode error ref", ref)
 
321
                continue
 
322
            except ValueError:
 
323
                continue
 
324
            ret[branch_name] = self.open_branch(ref=ref)
 
325
        return ret
 
326
 
 
327
    def list_branches(self):
 
328
        return list(self.get_branches().values())
 
329
 
 
330
    def push_branch(self, source, revision_id=None, overwrite=False,
 
331
                    remember=False, create_prefix=False, lossy=False,
 
332
                    name=None, tag_selector=None):
 
333
        """Push the source branch into this ControlDir."""
 
334
        push_result = GitPushResult()
 
335
        push_result.workingtree_updated = None
 
336
        push_result.master_branch = None
 
337
        push_result.source_branch = source
 
338
        push_result.stacked_on = None
 
339
        from .branch import GitBranch
 
340
        if isinstance(source, GitBranch) and lossy:
 
341
            raise brz_errors.LossyPushToSameVCS(source.controldir, self)
 
342
        target = self.open_branch(name, nascent_ok=True)
 
343
        push_result.branch_push_result = source.push(
 
344
            target, overwrite=overwrite, stop_revision=revision_id,
 
345
            lossy=lossy, tag_selector=tag_selector)
 
346
        push_result.new_revid = push_result.branch_push_result.new_revid
 
347
        push_result.old_revid = push_result.branch_push_result.old_revid
 
348
        try:
 
349
            wt = self.open_workingtree()
 
350
        except brz_errors.NoWorkingTree:
 
351
            push_result.workingtree_updated = None
 
352
        else:
 
353
            if self.open_branch(name="").name == target.name:
 
354
                wt._update_git_tree(
 
355
                    old_revision=push_result.old_revid,
 
356
                    new_revision=push_result.new_revid)
 
357
                push_result.workingtree_updated = True
 
358
            else:
 
359
                push_result.workingtree_updated = False
 
360
        push_result.target_branch = target
 
361
        if source.get_push_location() is None or remember:
 
362
            source.set_push_location(push_result.target_branch.base)
 
363
        return push_result
 
364
 
 
365
 
 
366
class LocalGitControlDirFormat(GitControlDirFormat):
 
367
    """The .git directory control format."""
 
368
 
 
369
    bare = False
 
370
 
 
371
    @classmethod
 
372
    def _known_formats(self):
 
373
        return set([LocalGitControlDirFormat()])
 
374
 
 
375
    @property
 
376
    def repository_format(self):
 
377
        from .repository import GitRepositoryFormat
 
378
        return GitRepositoryFormat()
 
379
 
 
380
    @property
 
381
    def workingtree_format(self):
 
382
        from .workingtree import GitWorkingTreeFormat
 
383
        return GitWorkingTreeFormat()
 
384
 
 
385
    def get_branch_format(self):
 
386
        from .branch import LocalGitBranchFormat
 
387
        return LocalGitBranchFormat()
 
388
 
 
389
    def open(self, transport, _found=None):
 
390
        """Open this directory.
 
391
 
 
392
        """
 
393
        from .transportgit import TransportRepo
 
394
 
 
395
        def _open(transport):
 
396
            try:
 
397
                return TransportRepo(transport, self.bare,
 
398
                                     refs_text=getattr(self, "_refs_text", None))
 
399
            except ValueError as e:
 
400
                if e.args == ('Expected file to start with \'gitdir: \'', ):
 
401
                    raise brz_errors.NotBranchError(path=transport.base)
 
402
                raise
 
403
 
 
404
        def redirected(transport, e, redirection_notice):
 
405
            trace.note(redirection_notice)
 
406
            return transport._redirected_to(e.source, e.target)
 
407
        gitrepo = do_catching_redirections(_open, transport, redirected)
 
408
        if not _found and not gitrepo._controltransport.has('objects'):
 
409
            raise brz_errors.NotBranchError(path=transport.base)
 
410
        return LocalGitDir(transport, gitrepo, self)
 
411
 
 
412
    def get_format_description(self):
 
413
        return "Local Git Repository"
 
414
 
 
415
    def initialize_on_transport(self, transport):
 
416
        from .transportgit import TransportRepo
 
417
        git_repo = TransportRepo.init(transport, bare=self.bare)
 
418
        return LocalGitDir(transport, git_repo, self)
 
419
 
 
420
    def initialize_on_transport_ex(self, transport, use_existing_dir=False,
 
421
                                   create_prefix=False, force_new_repo=False,
 
422
                                   stacked_on=None,
 
423
                                   stack_on_pwd=None, repo_format_name=None,
 
424
                                   make_working_trees=None,
 
425
                                   shared_repo=False, vfs_only=False):
 
426
        if shared_repo:
 
427
            raise brz_errors.SharedRepositoriesUnsupported(self)
 
428
 
 
429
        def make_directory(transport):
 
430
            transport.mkdir('.')
 
431
            return transport
 
432
 
 
433
        def redirected(transport, e, redirection_notice):
 
434
            trace.note(redirection_notice)
 
435
            return transport._redirected_to(e.source, e.target)
 
436
        try:
 
437
            transport = do_catching_redirections(
 
438
                make_directory, transport, redirected)
 
439
        except brz_errors.FileExists:
 
440
            if not use_existing_dir:
 
441
                raise
 
442
        except brz_errors.NoSuchFile:
 
443
            if not create_prefix:
 
444
                raise
 
445
            transport.create_prefix()
 
446
        controldir = self.initialize_on_transport(transport)
 
447
        if repo_format_name:
 
448
            result_repo = controldir.find_repository()
 
449
            repository_policy = UseExistingRepository(result_repo)
 
450
            result_repo.lock_write()
 
451
        else:
 
452
            result_repo = None
 
453
            repository_policy = None
 
454
        return (result_repo, controldir, False,
 
455
                repository_policy)
 
456
 
 
457
    def is_supported(self):
 
458
        return True
 
459
 
 
460
    def supports_transport(self, transport):
 
461
        try:
 
462
            external_url = transport.external_url()
 
463
        except brz_errors.InProcessTransport:
 
464
            raise brz_errors.NotBranchError(path=transport.base)
 
465
        return external_url.startswith("file:")
 
466
 
 
467
    def is_control_filename(self, filename):
 
468
        return (filename == '.git'
 
469
                or filename.startswith('.git/')
 
470
                or filename.startswith('.git\\'))
 
471
 
 
472
 
 
473
class BareLocalGitControlDirFormat(LocalGitControlDirFormat):
 
474
 
 
475
    bare = True
 
476
    supports_workingtrees = False
 
477
 
 
478
    def get_format_description(self):
 
479
        return "Local Git Repository (bare)"
 
480
 
 
481
    def is_control_filename(self, filename):
 
482
        return False
 
483
 
124
484
 
125
485
class LocalGitDir(GitDir):
126
486
    """An adapter to the '.git' dir used by git."""
127
487
 
128
488
    def _get_gitrepository_class(self):
129
 
        from bzrlib.plugins.git.repository import LocalGitRepository
 
489
        from .repository import LocalGitRepository
130
490
        return LocalGitRepository
131
491
 
 
492
    def __repr__(self):
 
493
        return "<%s at %r>" % (
 
494
            self.__class__.__name__, self.root_transport.base)
 
495
 
132
496
    _gitrepository_class = property(_get_gitrepository_class)
133
497
 
134
498
    @property
137
501
 
138
502
    @property
139
503
    def control_transport(self):
140
 
        return self.transport
 
504
        return self._git._controltransport
141
505
 
142
 
    def __init__(self, transport, lockfiles, gitrepo, format):
 
506
    def __init__(self, transport, gitrepo, format):
143
507
        self._format = format
144
508
        self.root_transport = transport
145
509
        self._mode_check_done = False
148
512
            self.transport = transport
149
513
        else:
150
514
            self.transport = transport.clone('.git')
151
 
        self._lockfiles = lockfiles
152
515
        self._mode_check_done = None
153
516
 
154
 
    def _branch_name_to_ref(self, name):
155
 
        from bzrlib.plugins.git.refs import branch_name_to_ref
156
 
        ref = branch_name_to_ref(name, None)
157
 
        if ref == "HEAD":
158
 
            from dulwich.repo import SYMREF
159
 
            refcontents = self._git.refs.read_ref(ref)
160
 
            if refcontents.startswith(SYMREF):
161
 
                ref = refcontents[len(SYMREF):]
162
 
        return ref
163
 
 
164
 
    def is_control_filename(self, filename):
165
 
        return filename == '.git' or filename.startswith('.git/')
 
517
    def _get_symref(self, ref):
 
518
        ref_chain, unused_sha = self._git.refs.follow(ref)
 
519
        if len(ref_chain) == 1:
 
520
            return None
 
521
        return ref_chain[1]
 
522
 
 
523
    def set_branch_reference(self, target_branch, name=None):
 
524
        ref = self._get_selected_ref(name)
 
525
        target_transport = target_branch.controldir.control_transport
 
526
        if self.control_transport.base == target_transport.base:
 
527
            if ref == target_branch.ref:
 
528
                raise BranchReferenceLoop(target_branch)
 
529
            self._git.refs.set_symbolic_ref(ref, target_branch.ref)
 
530
        else:
 
531
            try:
 
532
                target_path = (
 
533
                    target_branch.controldir.control_transport.local_abspath(
 
534
                        '.'))
 
535
            except brz_errors.NotLocalUrl:
 
536
                raise brz_errors.IncompatibleFormat(
 
537
                    target_branch._format, self._format)
 
538
            # TODO(jelmer): Do some consistency checking across branches..
 
539
            self.control_transport.put_bytes(
 
540
                'commondir', target_path.encode('utf-8'))
 
541
            # TODO(jelmer): Urgh, avoid mucking about with internals.
 
542
            self._git._commontransport = (
 
543
                target_branch.repository._git._commontransport.clone())
 
544
            self._git.object_store = TransportObjectStore(
 
545
                self._git._commontransport.clone(OBJECTDIR))
 
546
            self._git.refs.transport = self._git._commontransport
 
547
            target_ref_chain, unused_sha = (
 
548
                target_branch.controldir._git.refs.follow(target_branch.ref))
 
549
            for target_ref in target_ref_chain:
 
550
                if target_ref == b'HEAD':
 
551
                    continue
 
552
                break
 
553
            else:
 
554
                # Can't create a reference to something that is not a in a repository.
 
555
                raise brz_errors.IncompatibleFormat(
 
556
                    self.set_branch_reference, self)
 
557
            self._git.refs.set_symbolic_ref(ref, target_ref)
 
558
 
 
559
    def get_branch_reference(self, name=None):
 
560
        ref = self._get_selected_ref(name)
 
561
        target_ref = self._get_symref(ref)
 
562
        if target_ref is not None:
 
563
            from .refs import ref_to_branch_name
 
564
            try:
 
565
                branch_name = ref_to_branch_name(target_ref)
 
566
            except ValueError:
 
567
                params = {'ref': urlutils.quote(
 
568
                    target_ref.decode('utf-8'), '')}
 
569
            else:
 
570
                if branch_name != '':
 
571
                    params = {'branch': urlutils.quote(branch_name, '')}
 
572
                else:
 
573
                    params = {}
 
574
            try:
 
575
                commondir = self.control_transport.get_bytes('commondir')
 
576
            except brz_errors.NoSuchFile:
 
577
                base_url = self.user_url.rstrip('/')
 
578
            else:
 
579
                base_url = urlutils.local_path_to_url(
 
580
                    commondir.decode(osutils._fs_enc)).rstrip('/.git/') + '/'
 
581
            return urlutils.join_segment_parameters(base_url, params)
 
582
        return None
 
583
 
 
584
    def find_branch_format(self, name=None):
 
585
        from .branch import (
 
586
            LocalGitBranchFormat,
 
587
            )
 
588
        return LocalGitBranchFormat()
166
589
 
167
590
    def get_branch_transport(self, branch_format, name=None):
168
591
        if branch_format is None:
169
592
            return self.transport
170
593
        if isinstance(branch_format, LocalGitControlDirFormat):
171
594
            return self.transport
172
 
        raise bzr_errors.IncompatibleFormat(branch_format, self._format)
 
595
        raise brz_errors.IncompatibleFormat(branch_format, self._format)
173
596
 
174
597
    def get_repository_transport(self, format):
175
598
        if format is None:
176
599
            return self.transport
177
600
        if isinstance(format, LocalGitControlDirFormat):
178
601
            return self.transport
179
 
        raise bzr_errors.IncompatibleFormat(format, self._format)
 
602
        raise brz_errors.IncompatibleFormat(format, self._format)
180
603
 
181
604
    def get_workingtree_transport(self, format):
182
605
        if format is None:
183
606
            return self.transport
184
607
        if isinstance(format, LocalGitControlDirFormat):
185
608
            return self.transport
186
 
        raise bzr_errors.IncompatibleFormat(format, self._format)
 
609
        raise brz_errors.IncompatibleFormat(format, self._format)
187
610
 
188
 
    def _open_branch(self, name=None, ignore_fallbacks=None, unsupported=False):
 
611
    def open_branch(self, name=None, unsupported=False, ignore_fallbacks=None,
 
612
                    ref=None, possible_transports=None, nascent_ok=False):
189
613
        """'create' a branch for this dir."""
190
 
        repo = self.open_repository()
191
 
        from bzrlib.plugins.git.branch import LocalGitBranch
192
 
        return LocalGitBranch(self, repo, self._branch_name_to_ref(name),
193
 
            self._lockfiles)
 
614
        repo = self.find_repository()
 
615
        from .branch import LocalGitBranch
 
616
        ref = self._get_selected_ref(name, ref)
 
617
        if not nascent_ok and ref not in self._git.refs:
 
618
            raise brz_errors.NotBranchError(
 
619
                self.root_transport.base, controldir=self)
 
620
        ref_chain, unused_sha = self._git.refs.follow(ref)
 
621
        if ref_chain[-1] == b'HEAD':
 
622
            controldir = self
 
623
        else:
 
624
            controldir = self._find_commondir()
 
625
        return LocalGitBranch(controldir, repo, ref_chain[-1])
194
626
 
195
627
    def destroy_branch(self, name=None):
196
 
        refname = self._branch_name_to_ref(name)
197
 
        if not refname in self._git.refs:
198
 
            raise bzr_errors.NotBranchError(self.root_transport.base,
199
 
                    bzrdir=self)
200
 
        del self._git.refs[refname]
 
628
        refname = self._get_selected_ref(name)
 
629
        if refname == b'HEAD':
 
630
            # HEAD can't be removed
 
631
            raise brz_errors.UnsupportedOperation(
 
632
                self.destroy_branch, self)
 
633
        try:
 
634
            del self._git.refs[refname]
 
635
        except KeyError:
 
636
            raise brz_errors.NotBranchError(
 
637
                self.root_transport.base, controldir=self)
201
638
 
202
639
    def destroy_repository(self):
203
 
        raise bzr_errors.UnsupportedOperation(self.destroy_repository, self)
 
640
        raise brz_errors.UnsupportedOperation(self.destroy_repository, self)
204
641
 
205
642
    def destroy_workingtree(self):
206
 
        raise bzr_errors.UnsupportedOperation(self.destroy_workingtree, self)
 
643
        raise brz_errors.UnsupportedOperation(self.destroy_workingtree, self)
 
644
 
 
645
    def destroy_workingtree_metadata(self):
 
646
        raise brz_errors.UnsupportedOperation(
 
647
            self.destroy_workingtree_metadata, self)
207
648
 
208
649
    def needs_format_conversion(self, format=None):
209
650
        return not isinstance(self._format, format.__class__)
210
651
 
211
 
    def list_branches(self):
212
 
        ret = []
213
 
        for name in self._git.get_refs():
214
 
            if name.startswith("refs/heads/"):
215
 
                ret.append(self.open_branch(name=name))
216
 
        return ret
217
 
 
218
 
    def open_repository(self, shared=False):
 
652
    def open_repository(self):
219
653
        """'open' a repository for this dir."""
220
 
        return self._gitrepository_class(self, self._lockfiles)
221
 
 
222
 
    def open_workingtree(self, recommend_upgrade=True):
 
654
        if self.control_transport.has('commondir'):
 
655
            raise brz_errors.NoRepositoryPresent(self)
 
656
        return self._gitrepository_class(self)
 
657
 
 
658
    def has_workingtree(self):
 
659
        return not self._git.bare
 
660
 
 
661
    def open_workingtree(self, recommend_upgrade=True, unsupported=False):
223
662
        if not self._git.bare:
224
 
            from dulwich.errors import NoIndexPresent
225
 
            repo = self.open_repository()
226
 
            try:
227
 
                index = repo._git.open_index()
228
 
            except NoIndexPresent:
229
 
                pass
230
 
            else:
231
 
                from bzrlib.plugins.git.workingtree import GitWorkingTree
232
 
                try:
233
 
                    branch = self.open_branch()
234
 
                except bzr_errors.NotBranchError:
235
 
                    pass
236
 
                else:
237
 
                    return GitWorkingTree(self, repo, branch, index)
 
663
            repo = self.find_repository()
 
664
            from .workingtree import GitWorkingTree
 
665
            branch = self.open_branch(ref=b'HEAD', nascent_ok=True)
 
666
            return GitWorkingTree(self, repo, branch)
238
667
        loc = urlutils.unescape_for_display(self.root_transport.base, 'ascii')
239
 
        raise bzr_errors.NoWorkingTree(loc)
 
668
        raise brz_errors.NoWorkingTree(loc)
240
669
 
241
670
    def create_repository(self, shared=False):
242
 
        return self.open_repository()
 
671
        from .repository import GitRepositoryFormat
 
672
        if shared:
 
673
            raise brz_errors.IncompatibleFormat(
 
674
                GitRepositoryFormat(), self._format)
 
675
        return self.find_repository()
243
676
 
244
 
    def create_branch(self, name=None):
245
 
        refname = self._branch_name_to_ref(name)
246
 
        from dulwich.protocol import ZERO_SHA
247
 
        self._git.refs[refname or "HEAD"] = ZERO_SHA
248
 
        return self.open_branch(name)
 
677
    def create_branch(self, name=None, repository=None,
 
678
                      append_revisions_only=None, ref=None):
 
679
        refname = self._get_selected_ref(name, ref)
 
680
        if refname != b'HEAD' and refname in self._git.refs:
 
681
            raise brz_errors.AlreadyBranchError(self.user_url)
 
682
        repo = self.open_repository()
 
683
        if refname in self._git.refs:
 
684
            ref_chain, unused_sha = self._git.refs.follow(
 
685
                self._get_selected_ref(None))
 
686
            if ref_chain[0] == b'HEAD':
 
687
                refname = ref_chain[1]
 
688
        from .branch import LocalGitBranch
 
689
        branch = LocalGitBranch(self, repo, refname)
 
690
        if append_revisions_only:
 
691
            branch.set_append_revisions_only(append_revisions_only)
 
692
        return branch
249
693
 
250
694
    def backup_bzrdir(self):
251
 
        if self._git.bare:
 
695
        if not self._git.bare:
252
696
            self.root_transport.copy_tree(".git", ".git.backup")
253
697
            return (self.root_transport.abspath(".git"),
254
698
                    self.root_transport.abspath(".git.backup"))
255
699
        else:
256
 
            raise bzr_errors.BzrError("Unable to backup bare repositories")
 
700
            basename = urlutils.basename(self.root_transport.base)
 
701
            parent = self.root_transport.clone('..')
 
702
            parent.copy_tree(basename, basename + ".backup")
257
703
 
258
704
    def create_workingtree(self, revision_id=None, from_branch=None,
259
 
        accelerator_tree=None, hardlink=False):
 
705
                           accelerator_tree=None, hardlink=False):
260
706
        if self._git.bare:
261
 
            raise bzr_errors.BzrError("Can't create working tree in a bare repo")
262
 
        from dulwich.index import write_index
263
 
        from dulwich.pack import SHA1Writer
264
 
        f = open(self.transport.local_abspath("index"), 'w+')
265
 
        try:
266
 
            f = SHA1Writer(f)
267
 
            write_index(f, [])
268
 
        finally:
269
 
            f.close()
270
 
        return self.open_workingtree()
271
 
 
272
 
    def find_repository(self):
273
 
        """Find the repository that should be used.
274
 
 
275
 
        This does not require a branch as we use it to find the repo for
276
 
        new branches as well as to hook existing branches up to their
277
 
        repository.
278
 
        """
279
 
        return self.open_repository()
 
707
            raise brz_errors.UnsupportedOperation(
 
708
                self.create_workingtree, self)
 
709
        if from_branch is None:
 
710
            from_branch = self.open_branch(nascent_ok=True)
 
711
        if revision_id is None:
 
712
            revision_id = from_branch.last_revision()
 
713
        repo = self.find_repository()
 
714
        from .workingtree import GitWorkingTree
 
715
        wt = GitWorkingTree(self, repo, from_branch)
 
716
        wt.set_last_revision(revision_id)
 
717
        wt._build_checkout_with_index()
 
718
        return wt
 
719
 
 
720
    def _find_or_create_repository(self, force_new_repo=None):
 
721
        return self.create_repository(shared=False)
280
722
 
281
723
    def _find_creation_modes(self):
282
724
        """Determine the appropriate modes for files and directories.
291
733
        self._mode_check_done = True
292
734
        try:
293
735
            st = self.transport.stat('.')
294
 
        except TransportNotPossible:
 
736
        except brz_errors.TransportNotPossible:
295
737
            self._dir_mode = None
296
738
            self._file_mode = None
297
739
        else:
299
741
            # directories and files are read-write for this user. This is
300
742
            # mostly a workaround for filesystems which lie about being able to
301
743
            # write to a directory (cygwin & win32)
302
 
            if (st.st_mode & 07777 == 00000):
 
744
            if (st.st_mode & 0o7777 == 0o0000):
303
745
                # FTP allows stat but does not return dir/file modes
304
746
                self._dir_mode = None
305
747
                self._file_mode = None
306
748
            else:
307
 
                self._dir_mode = (st.st_mode & 07777) | 00700
 
749
                self._dir_mode = (st.st_mode & 0o7777) | 0o0700
308
750
                # Remove the sticky and execute bits for files
309
 
                self._file_mode = self._dir_mode & ~07111
 
751
                self._file_mode = self._dir_mode & ~0o7111
310
752
 
311
753
    def _get_file_mode(self):
312
754
        """Return Unix mode for newly created files, or None.
322
764
            self._find_creation_modes()
323
765
        return self._dir_mode
324
766
 
325
 
 
 
767
    def get_refs_container(self):
 
768
        return self._git.refs
 
769
 
 
770
    def get_peeled(self, ref):
 
771
        return self._git.get_peeled(ref)
 
772
 
 
773
    def _find_commondir(self):
 
774
        try:
 
775
            commondir = self.control_transport.get_bytes('commondir')
 
776
        except brz_errors.NoSuchFile:
 
777
            return self
 
778
        else:
 
779
            commondir = commondir.rstrip(b'/.git/').decode(osutils._fs_enc)
 
780
            return ControlDir.open_from_transport(
 
781
                get_transport_from_path(commondir))