1
# Copyright (C) 2007 Canonical Ltd
2
# Copyright (C) 2010-2018 Jelmer Vernooij
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.
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.
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
18
"""An adapter between a Git control dir and a Bazaar ControlDir."""
20
from __future__ import absolute_import
23
branch as _mod_branch,
29
from ..sixish import (
33
from ..transport import (
34
do_catching_redirections,
35
get_transport_from_path,
38
from ..controldir import (
43
RepositoryAcquisitionPolicy,
49
from .transportgit import (
55
class GitDirConfig(object):
57
def get_default_stack_on(self):
60
def set_default_stack_on(self, value):
61
raise brz_errors.BzrError("Cannot set configuration")
64
class GitControlDirFormat(ControlDirFormat):
66
colocated_branches = True
67
fixed_components = True
69
def __eq__(self, other):
70
return type(self) == type(other)
72
def is_supported(self):
75
def network_name(self):
79
class UseExistingRepository(RepositoryAcquisitionPolicy):
80
"""A policy of reusing an existing repository"""
82
def __init__(self, repository, stack_on=None, stack_on_pwd=None,
83
require_stacking=False):
86
:param repository: The repository to use.
87
:param stack_on: A location to stack on
88
:param stack_on_pwd: If stack_on is relative, the location it is
91
super(UseExistingRepository, self).__init__(
92
stack_on, stack_on_pwd, require_stacking)
93
self._repository = repository
95
def acquire_repository(self, make_working_trees=None, shared=False,
96
possible_transports=None):
97
"""Implementation of RepositoryAcquisitionPolicy.acquire_repository
99
Returns an existing repository to use.
101
return self._repository, False
104
class GitDir(ControlDir):
105
"""An adapter to the '.git' dir used by git."""
107
def is_supported(self):
110
def can_convert_format(self):
113
def break_lock(self):
114
# There are no global locks, so nothing to break.
115
raise NotImplementedError(self.break_lock)
117
def cloning_metadir(self, stacked=False):
118
return format_registry.make_controldir("git")
120
def checkout_metadir(self, stacked=False):
121
return format_registry.make_controldir("git")
123
def _get_selected_ref(self, branch, ref=None):
124
if ref is not None and branch is not None:
125
raise brz_errors.BzrError("can't specify both ref and branch")
128
if branch is not None:
129
from .refs import branch_name_to_ref
130
return branch_name_to_ref(branch)
131
segment_parameters = getattr(
132
self.user_transport, "get_segment_parameters", lambda: {})()
133
ref = segment_parameters.get("ref")
135
return urlutils.unquote_to_bytes(ref)
136
if branch is None and getattr(self, "_get_selected_branch", False):
137
branch = self._get_selected_branch()
138
if branch is not None:
139
from .refs import branch_name_to_ref
140
return branch_name_to_ref(branch)
143
def get_config(self):
144
return GitDirConfig()
146
def _available_backup_name(self, base):
147
return osutils.available_backup_name(base, self.root_transport.has)
149
def sprout(self, url, revision_id=None, force_new_repo=False,
150
recurse='down', possible_transports=None,
151
accelerator_tree=None, hardlink=False, stacked=False,
152
source_branch=None, create_tree_if_local=True):
153
from ..repository import InterRepository
154
from ..transport.local import LocalTransport
155
from ..transport import get_transport
156
target_transport = get_transport(url, possible_transports)
157
target_transport.ensure_base()
158
cloning_format = self.cloning_metadir()
159
# Create/update the result branch
161
result = ControlDir.open_from_transport(target_transport)
162
except brz_errors.NotBranchError:
163
result = cloning_format.initialize_on_transport(target_transport)
164
source_branch = self.open_branch()
165
source_repository = self.find_repository()
167
result_repo = result.find_repository()
168
except brz_errors.NoRepositoryPresent:
169
result_repo = result.create_repository()
171
raise _mod_branch.UnstackableBranchFormat(
172
self._format, self.user_url)
173
interrepo = InterRepository.get(source_repository, result_repo)
175
if revision_id is not None:
176
determine_wants = interrepo.get_determine_wants_revids(
177
[revision_id], include_tags=True)
179
determine_wants = interrepo.determine_wants_all
180
interrepo.fetch_objects(determine_wants=determine_wants,
181
mapping=source_branch.mapping)
182
result_branch = source_branch.sprout(
183
result, revision_id=revision_id, repository=result_repo)
184
if (create_tree_if_local and
185
result.open_branch(name="").name == result_branch.name and
186
isinstance(target_transport, LocalTransport) and
187
(result_repo is None or result_repo.make_working_trees())):
188
result.create_workingtree(
189
accelerator_tree=accelerator_tree,
190
hardlink=hardlink, from_branch=result_branch)
193
def clone_on_transport(self, transport, revision_id=None,
194
force_new_repo=False, preserve_stacking=False,
195
stacked_on=None, create_prefix=False,
196
use_existing_dir=True, no_tree=False):
197
"""See ControlDir.clone_on_transport."""
198
from ..repository import InterRepository
199
from .mapping import default_mapping
200
if stacked_on is not None:
201
raise _mod_branch.UnstackableBranchFormat(
202
self._format, self.user_url)
204
format = BareLocalGitControlDirFormat()
206
format = LocalGitControlDirFormat()
207
(target_repo, target_controldir, stacking,
208
repo_policy) = format.initialize_on_transport_ex(
209
transport, use_existing_dir=use_existing_dir,
210
create_prefix=create_prefix,
211
force_new_repo=force_new_repo)
212
target_repo = target_controldir.find_repository()
213
target_git_repo = target_repo._git
214
source_repo = self.find_repository()
215
interrepo = InterRepository.get(source_repo, target_repo)
216
if revision_id is not None:
217
determine_wants = interrepo.get_determine_wants_revids(
218
[revision_id], include_tags=True)
220
determine_wants = interrepo.determine_wants_all
221
(pack_hint, _, refs) = interrepo.fetch_objects(determine_wants,
222
mapping=default_mapping)
223
for name, val in viewitems(refs):
224
target_git_repo.refs[name] = val
225
result_dir = self.__class__(transport, target_git_repo, format)
226
if revision_id is not None:
227
result_dir.open_branch().set_last_revision(revision_id)
229
# Cheaper to check if the target is not local, than to try making
231
result_dir.root_transport.local_abspath('.')
232
if result_dir.open_repository().make_working_trees():
233
self.open_workingtree().clone(
234
result_dir, revision_id=revision_id)
235
except (brz_errors.NoWorkingTree, brz_errors.NotLocalUrl):
240
def find_repository(self):
241
"""Find the repository that should be used.
243
This does not require a branch as we use it to find the repo for
244
new branches as well as to hook existing branches up to their
247
return self._gitrepository_class(self._find_commondir())
249
def get_refs_container(self):
250
"""Retrieve the refs container.
252
raise NotImplementedError(self.get_refs_container)
254
def determine_repository_policy(self, force_new_repo=False, stack_on=None,
255
stack_on_pwd=None, require_stacking=False):
256
"""Return an object representing a policy to use.
258
This controls whether a new repository is created, and the format of
259
that repository, or some existing shared repository used instead.
261
If stack_on is supplied, will not seek a containing shared repo.
263
:param force_new_repo: If True, require a new repository to be created.
264
:param stack_on: If supplied, the location to stack on. If not
265
supplied, a default_stack_on location may be used.
266
:param stack_on_pwd: If stack_on is relative, the location it is
269
return UseExistingRepository(self.find_repository())
271
def get_branches(self):
272
from .refs import ref_to_branch_name
274
for ref in self.get_refs_container().keys():
276
branch_name = ref_to_branch_name(ref)
277
except UnicodeDecodeError:
278
trace.warning("Ignoring branch %r with unicode error ref", ref)
282
ret[branch_name] = self.open_branch(ref=ref)
285
def list_branches(self):
286
return list(self.get_branches().values())
288
def push_branch(self, source, revision_id=None, overwrite=False,
289
remember=False, create_prefix=False, lossy=False,
291
"""Push the source branch into this ControlDir."""
292
push_result = GitPushResult()
293
push_result.workingtree_updated = None
294
push_result.master_branch = None
295
push_result.source_branch = source
296
push_result.stacked_on = None
297
from .branch import GitBranch
298
if isinstance(source, GitBranch) and lossy:
299
raise brz_errors.LossyPushToSameVCS(source.controldir, self)
300
target = self.open_branch(name, nascent_ok=True)
301
push_result.branch_push_result = source.push(
302
target, overwrite=overwrite, stop_revision=revision_id,
304
push_result.new_revid = push_result.branch_push_result.new_revid
305
push_result.old_revid = push_result.branch_push_result.old_revid
307
wt = self.open_workingtree()
308
except brz_errors.NoWorkingTree:
309
push_result.workingtree_updated = None
311
if self.open_branch(name="").name == target.name:
313
old_revision=push_result.old_revid,
314
new_revision=push_result.new_revid)
315
push_result.workingtree_updated = True
317
push_result.workingtree_updated = False
318
push_result.target_branch = target
319
if source.get_push_location() is None or remember:
320
source.set_push_location(push_result.target_branch.base)
324
class LocalGitControlDirFormat(GitControlDirFormat):
325
"""The .git directory control format."""
330
def _known_formats(self):
331
return set([LocalGitControlDirFormat()])
334
def repository_format(self):
335
from .repository import GitRepositoryFormat
336
return GitRepositoryFormat()
339
def workingtree_format(self):
340
from .workingtree import GitWorkingTreeFormat
341
return GitWorkingTreeFormat()
343
def get_branch_format(self):
344
from .branch import LocalGitBranchFormat
345
return LocalGitBranchFormat()
347
def open(self, transport, _found=None):
348
"""Open this directory.
351
from .transportgit import TransportRepo
353
def _open(transport):
354
return TransportRepo(transport, self.bare,
355
refs_text=getattr(self, "_refs_text", None))
357
def redirected(transport, e, redirection_notice):
358
trace.note(redirection_notice)
359
return transport._redirected_to(e.source, e.target)
360
gitrepo = do_catching_redirections(_open, transport, redirected)
361
if not gitrepo._controltransport.has('HEAD'):
362
raise brz_errors.NotBranchError(path=transport.base)
363
return LocalGitDir(transport, gitrepo, self)
365
def get_format_description(self):
366
return "Local Git Repository"
368
def initialize_on_transport(self, transport):
369
from .transportgit import TransportRepo
370
git_repo = TransportRepo.init(transport, bare=self.bare)
371
return LocalGitDir(transport, git_repo, self)
373
def initialize_on_transport_ex(self, transport, use_existing_dir=False,
374
create_prefix=False, force_new_repo=False,
376
stack_on_pwd=None, repo_format_name=None,
377
make_working_trees=None,
378
shared_repo=False, vfs_only=False):
379
def make_directory(transport):
383
def redirected(transport, e, redirection_notice):
384
trace.note(redirection_notice)
385
return transport._redirected_to(e.source, e.target)
387
transport = do_catching_redirections(
388
make_directory, transport, redirected)
389
except brz_errors.FileExists:
390
if not use_existing_dir:
392
except brz_errors.NoSuchFile:
393
if not create_prefix:
395
transport.create_prefix()
396
controldir = self.initialize_on_transport(transport)
398
result_repo = controldir.find_repository()
399
repository_policy = UseExistingRepository(result_repo)
400
result_repo.lock_write()
403
repository_policy = None
404
return (result_repo, controldir, False,
407
def is_supported(self):
410
def supports_transport(self, transport):
412
external_url = transport.external_url()
413
except brz_errors.InProcessTransport:
414
raise brz_errors.NotBranchError(path=transport.base)
415
return external_url.startswith("file:")
417
def is_control_filename(self, filename):
418
return (filename == '.git'
419
or filename.startswith('.git/')
420
or filename.startswith('.git\\'))
423
class BareLocalGitControlDirFormat(LocalGitControlDirFormat):
426
supports_workingtrees = False
428
def get_format_description(self):
429
return "Local Git Repository (bare)"
431
def is_control_filename(self, filename):
435
class LocalGitDir(GitDir):
436
"""An adapter to the '.git' dir used by git."""
438
def _get_gitrepository_class(self):
439
from .repository import LocalGitRepository
440
return LocalGitRepository
443
return "<%s at %r>" % (
444
self.__class__.__name__, self.root_transport.base)
446
_gitrepository_class = property(_get_gitrepository_class)
449
def user_transport(self):
450
return self.root_transport
453
def control_transport(self):
454
return self._git._controltransport
456
def __init__(self, transport, gitrepo, format):
457
self._format = format
458
self.root_transport = transport
459
self._mode_check_done = False
462
self.transport = transport
464
self.transport = transport.clone('.git')
465
self._mode_check_done = None
467
def _get_symref(self, ref):
468
ref_chain, unused_sha = self._git.refs.follow(ref)
469
if len(ref_chain) == 1:
473
def set_branch_reference(self, target_branch, name=None):
474
ref = self._get_selected_ref(name)
475
target_transport = target_branch.controldir.control_transport
476
if self.control_transport.base == target_transport.base:
477
if ref == target_branch.ref:
478
raise BranchReferenceLoop(target_branch)
479
self._git.refs.set_symbolic_ref(ref, target_branch.ref)
483
target_branch.controldir.control_transport.local_abspath(
485
except brz_errors.NotLocalUrl:
486
raise brz_errors.IncompatibleFormat(
487
target_branch._format, self._format)
488
# TODO(jelmer): Do some consistency checking across branches..
489
self.control_transport.put_bytes(
490
'commondir', target_path.encode('utf-8'))
491
# TODO(jelmer): Urgh, avoid mucking about with internals.
492
self._git._commontransport = (
493
target_branch.repository._git._commontransport.clone())
494
self._git.object_store = TransportObjectStore(
495
self._git._commontransport.clone(OBJECTDIR))
496
self._git.refs.transport = self._git._commontransport
497
target_ref_chain, unused_sha = (
498
target_branch.controldir._git.refs.follow(target_branch.ref))
499
for target_ref in target_ref_chain:
500
if target_ref == b'HEAD':
504
# Can't create a reference to something that is not a in a repository.
505
raise brz_errors.IncompatibleFormat(
506
self.set_branch_reference, self)
507
self._git.refs.set_symbolic_ref(ref, target_ref)
509
def get_branch_reference(self, name=None):
510
ref = self._get_selected_ref(name)
511
target_ref = self._get_symref(ref)
512
if target_ref is not None:
513
from .refs import ref_to_branch_name
515
branch_name = ref_to_branch_name(target_ref)
517
params = {'ref': urlutils.quote(
518
target_ref.decode('utf-8'), '')}
520
if branch_name != '':
521
params = {'branch': urlutils.quote(branch_name, '')}
525
commondir = self.control_transport.get_bytes('commondir')
526
except brz_errors.NoSuchFile:
527
base_url = self.user_url.rstrip('/')
529
base_url = urlutils.local_path_to_url(
530
commondir.decode(osutils._fs_enc)).rstrip('/.git/') + '/'
532
params = {k: v.encode('utf-8') for (k, v) in viewitems(params)}
533
return urlutils.join_segment_parameters(base_url, params)
536
def find_branch_format(self, name=None):
537
from .branch import (
538
LocalGitBranchFormat,
540
return LocalGitBranchFormat()
542
def get_branch_transport(self, branch_format, name=None):
543
if branch_format is None:
544
return self.transport
545
if isinstance(branch_format, LocalGitControlDirFormat):
546
return self.transport
547
raise brz_errors.IncompatibleFormat(branch_format, self._format)
549
def get_repository_transport(self, format):
551
return self.transport
552
if isinstance(format, LocalGitControlDirFormat):
553
return self.transport
554
raise brz_errors.IncompatibleFormat(format, self._format)
556
def get_workingtree_transport(self, format):
558
return self.transport
559
if isinstance(format, LocalGitControlDirFormat):
560
return self.transport
561
raise brz_errors.IncompatibleFormat(format, self._format)
563
def open_branch(self, name=None, unsupported=False, ignore_fallbacks=None,
564
ref=None, possible_transports=None, nascent_ok=False):
565
"""'create' a branch for this dir."""
566
repo = self.find_repository()
567
from .branch import LocalGitBranch
568
ref = self._get_selected_ref(name, ref)
569
if not nascent_ok and ref not in self._git.refs:
570
raise brz_errors.NotBranchError(
571
self.root_transport.base, controldir=self)
572
ref_chain, unused_sha = self._git.refs.follow(ref)
573
if ref_chain[-1] == b'HEAD':
576
controldir = self._find_commondir()
577
return LocalGitBranch(controldir, repo, ref_chain[-1])
579
def destroy_branch(self, name=None):
580
refname = self._get_selected_ref(name)
581
if refname == b'HEAD':
582
# HEAD can't be removed
583
raise brz_errors.UnsupportedOperation(
584
self.destroy_branch, self)
586
del self._git.refs[refname]
588
raise brz_errors.NotBranchError(
589
self.root_transport.base, controldir=self)
591
def destroy_repository(self):
592
raise brz_errors.UnsupportedOperation(self.destroy_repository, self)
594
def destroy_workingtree(self):
595
raise brz_errors.UnsupportedOperation(self.destroy_workingtree, self)
597
def destroy_workingtree_metadata(self):
598
raise brz_errors.UnsupportedOperation(
599
self.destroy_workingtree_metadata, self)
601
def needs_format_conversion(self, format=None):
602
return not isinstance(self._format, format.__class__)
604
def open_repository(self):
605
"""'open' a repository for this dir."""
606
if self.control_transport.has('commondir'):
607
raise brz_errors.NoRepositoryPresent(self)
608
return self._gitrepository_class(self)
610
def has_workingtree(self):
611
return not self._git.bare
613
def open_workingtree(self, recommend_upgrade=True, unsupported=False):
614
if not self._git.bare:
615
repo = self.find_repository()
616
from .workingtree import GitWorkingTree
617
branch = self.open_branch(ref=b'HEAD', nascent_ok=True)
618
return GitWorkingTree(self, repo, branch)
619
loc = urlutils.unescape_for_display(self.root_transport.base, 'ascii')
620
raise brz_errors.NoWorkingTree(loc)
622
def create_repository(self, shared=False):
623
from .repository import GitRepositoryFormat
625
raise brz_errors.IncompatibleFormat(
626
GitRepositoryFormat(), self._format)
627
return self.find_repository()
629
def create_branch(self, name=None, repository=None,
630
append_revisions_only=None, ref=None):
631
refname = self._get_selected_ref(name, ref)
632
if refname != b'HEAD' and refname in self._git.refs:
633
raise brz_errors.AlreadyBranchError(self.user_url)
634
repo = self.open_repository()
635
if refname in self._git.refs:
636
ref_chain, unused_sha = self._git.refs.follow(
637
self._get_selected_ref(None))
638
if ref_chain[0] == b'HEAD':
639
refname = ref_chain[1]
640
from .branch import LocalGitBranch
641
branch = LocalGitBranch(self, repo, refname)
642
if append_revisions_only:
643
branch.set_append_revisions_only(append_revisions_only)
646
def backup_bzrdir(self):
647
if not self._git.bare:
648
self.root_transport.copy_tree(".git", ".git.backup")
649
return (self.root_transport.abspath(".git"),
650
self.root_transport.abspath(".git.backup"))
652
basename = urlutils.basename(self.root_transport.base)
653
parent = self.root_transport.clone('..')
654
parent.copy_tree(basename, basename + ".backup")
656
def create_workingtree(self, revision_id=None, from_branch=None,
657
accelerator_tree=None, hardlink=False):
659
raise brz_errors.UnsupportedOperation(
660
self.create_workingtree, self)
661
if from_branch is None:
662
from_branch = self.open_branch(nascent_ok=True)
663
if revision_id is None:
664
revision_id = from_branch.last_revision()
665
repo = self.find_repository()
666
from .workingtree import GitWorkingTree
667
wt = GitWorkingTree(self, repo, from_branch)
668
wt.set_last_revision(revision_id)
669
wt._build_checkout_with_index()
672
def _find_or_create_repository(self, force_new_repo=None):
673
return self.create_repository(shared=False)
675
def _find_creation_modes(self):
676
"""Determine the appropriate modes for files and directories.
678
They're always set to be consistent with the base directory,
679
assuming that this transport allows setting modes.
681
# TODO: Do we need or want an option (maybe a config setting) to turn
682
# this off or override it for particular locations? -- mbp 20080512
683
if self._mode_check_done:
685
self._mode_check_done = True
687
st = self.transport.stat('.')
688
except brz_errors.TransportNotPossible:
689
self._dir_mode = None
690
self._file_mode = None
692
# Check the directory mode, but also make sure the created
693
# directories and files are read-write for this user. This is
694
# mostly a workaround for filesystems which lie about being able to
695
# write to a directory (cygwin & win32)
696
if (st.st_mode & 0o7777 == 0o0000):
697
# FTP allows stat but does not return dir/file modes
698
self._dir_mode = None
699
self._file_mode = None
701
self._dir_mode = (st.st_mode & 0o7777) | 0o0700
702
# Remove the sticky and execute bits for files
703
self._file_mode = self._dir_mode & ~0o7111
705
def _get_file_mode(self):
706
"""Return Unix mode for newly created files, or None.
708
if not self._mode_check_done:
709
self._find_creation_modes()
710
return self._file_mode
712
def _get_dir_mode(self):
713
"""Return Unix mode for newly created directories, or None.
715
if not self._mode_check_done:
716
self._find_creation_modes()
717
return self._dir_mode
719
def get_refs_container(self):
720
return self._git.refs
722
def get_peeled(self, ref):
723
return self._git.get_peeled(ref)
725
def _find_commondir(self):
727
commondir = self.control_transport.get_bytes('commondir')
728
except brz_errors.NoSuchFile:
731
commondir = commondir.rstrip(b'/.git/').decode(osutils._fs_enc)
732
return ControlDir.open_from_transport(
733
get_transport_from_path(commondir))