File: //kunden/proc/self/root/lib/python3/dist-packages/breezy/git/repository.py
# Copyright (C) 2008-2018 Jelmer Vernooij <jelmer@jelmer.uk>
# Copyright (C) 2007 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""An adapter between a Git Repository and a Bazaar Branch"""
from __future__ import absolute_import
from .. import (
check,
errors,
graph as _mod_graph,
lock,
repository,
revision as _mod_revision,
trace,
transactions,
ui,
)
from ..decorators import only_raises
from ..foreign import (
ForeignRepository,
)
from ..sixish import (
viewitems,
viewvalues,
)
from .commit import (
GitCommitBuilder,
)
from .filegraph import (
GitFileLastChangeScanner,
GitFileParentProvider,
)
from .mapping import (
default_mapping,
foreign_vcs_git,
mapping_registry,
)
from .tree import (
GitRevisionTree,
)
from dulwich.errors import (
NotCommitError,
)
from dulwich.objects import (
Commit,
ZERO_SHA,
)
from dulwich.object_store import (
tree_lookup_path,
)
class GitCheck(check.Check):
def __init__(self, repository, check_repo=True):
self.repository = repository
self.check_repo = check_repo
self.checked_rev_cnt = 0
self.object_count = None
self.problems = []
def check(self, callback_refs=None, check_repo=True):
if callback_refs is None:
callback_refs = {}
with self.repository.lock_read(), \
ui.ui_factory.nested_progress_bar() as self.progress:
shas = set(self.repository._git.object_store)
self.object_count = len(shas)
# TODO(jelmer): Check more things
for i, sha in enumerate(shas):
self.progress.update('checking objects', i, self.object_count)
o = self.repository._git.object_store[sha]
try:
o.check()
except Exception as e:
self.problems.append((sha, e))
def _report_repo_results(self, verbose):
trace.note('checked repository {0} format {1}'.format(
self.repository.user_url,
self.repository._format))
trace.note('%6d objects', self.object_count)
for sha, problem in self.problems:
trace.note('%s: %s', sha, problem)
def report_results(self, verbose):
if self.check_repo:
self._report_repo_results(verbose)
_optimisers_loaded = False
def lazy_load_optimisers():
global _optimisers_loaded
if _optimisers_loaded:
return
from . import interrepo
for optimiser in [interrepo.InterRemoteGitNonGitRepository,
interrepo.InterLocalGitNonGitRepository,
interrepo.InterLocalGitLocalGitRepository,
interrepo.InterRemoteGitLocalGitRepository,
interrepo.InterToLocalGitRepository,
interrepo.InterToRemoteGitRepository,
]:
repository.InterRepository.register_optimiser(optimiser)
_optimisers_loaded = True
class GitRepository(ForeignRepository):
"""An adapter to git repositories for bzr."""
_serializer = None
vcs = foreign_vcs_git
chk_bytes = None
def __init__(self, gitdir):
self._transport = gitdir.root_transport
super(GitRepository, self).__init__(GitRepositoryFormat(),
gitdir, control_files=None)
self.base = gitdir.root_transport.base
lazy_load_optimisers()
self._lock_mode = None
self._lock_count = 0
def add_fallback_repository(self, basis_url):
raise errors.UnstackableRepositoryFormat(self._format,
self.control_transport.base)
def is_shared(self):
return False
def get_physical_lock_status(self):
return False
def lock_write(self):
"""See Branch.lock_write()."""
if self._lock_mode:
if self._lock_mode != 'w':
raise errors.ReadOnlyError(self)
self._lock_count += 1
else:
self._lock_mode = 'w'
self._lock_count = 1
self._transaction = transactions.WriteTransaction()
return repository.RepositoryWriteLockResult(self.unlock, None)
def break_lock(self):
raise NotImplementedError(self.break_lock)
def dont_leave_lock_in_place(self):
raise NotImplementedError(self.dont_leave_lock_in_place)
def leave_lock_in_place(self):
raise NotImplementedError(self.leave_lock_in_place)
def lock_read(self):
if self._lock_mode:
if self._lock_mode not in ('r', 'w'):
raise AssertionError
self._lock_count += 1
else:
self._lock_mode = 'r'
self._lock_count = 1
self._transaction = transactions.ReadOnlyTransaction()
return lock.LogicalLockResult(self.unlock)
@only_raises(errors.LockNotHeld, errors.LockBroken)
def unlock(self):
if self._lock_count == 0:
raise errors.LockNotHeld(self)
if self._lock_count == 1 and self._lock_mode == 'w':
if self._write_group is not None:
self.abort_write_group()
self._lock_count -= 1
self._lock_mode = None
raise errors.BzrError(
'Must end write groups before releasing write locks.')
self._lock_count -= 1
if self._lock_count == 0:
self._lock_mode = None
transaction = self._transaction
self._transaction = None
transaction.finish()
def is_write_locked(self):
return (self._lock_mode == 'w')
def is_locked(self):
return (self._lock_mode is not None)
def get_transaction(self):
"""See Repository.get_transaction()."""
if self._transaction is None:
return transactions.PassThroughTransaction()
else:
return self._transaction
def reconcile(self, other=None, thorough=False):
"""Reconcile this repository."""
from ..reconcile import ReconcileResult
ret = ReconcileResult()
ret.aborted = False
return ret
def supports_rich_root(self):
return True
def get_mapping(self):
return default_mapping
def make_working_trees(self):
return not self._git.get_config().get_boolean(("core", ), "bare")
def revision_graph_can_have_wrong_parents(self):
return False
def add_signature_text(self, revid, signature):
raise errors.UnsupportedOperation(self.add_signature_text, self)
def sign_revision(self, revision_id, gpg_strategy):
raise errors.UnsupportedOperation(self.add_signature_text, self)
class LocalGitRepository(GitRepository):
"""Git repository on the file system."""
def __init__(self, gitdir):
GitRepository.__init__(self, gitdir)
self._git = gitdir._git
self._file_change_scanner = GitFileLastChangeScanner(self)
self._transaction = None
def get_commit_builder(self, branch, parents, config, timestamp=None,
timezone=None, committer=None, revprops=None,
revision_id=None, lossy=False):
"""Obtain a CommitBuilder for this repository.
:param branch: Branch to commit to.
:param parents: Revision ids of the parents of the new revision.
:param config: Configuration to use.
:param timestamp: Optional timestamp recorded for commit.
:param timezone: Optional timezone for timestamp.
:param committer: Optional committer to set for commit.
:param revprops: Optional dictionary of revision properties.
:param revision_id: Optional revision id.
:param lossy: Whether to discard data that can not be natively
represented, when pushing to a foreign VCS
"""
builder = GitCommitBuilder(
self, parents, config, timestamp, timezone, committer, revprops,
revision_id, lossy)
self.start_write_group()
return builder
def get_file_graph(self):
return _mod_graph.Graph(GitFileParentProvider(
self._file_change_scanner))
def iter_files_bytes(self, desired_files):
"""Iterate through file versions.
Files will not necessarily be returned in the order they occur in
desired_files. No specific order is guaranteed.
Yields pairs of identifier, bytes_iterator. identifier is an opaque
value supplied by the caller as part of desired_files. It should
uniquely identify the file version in the caller's context. (Examples:
an index number or a TreeTransform trans_id.)
bytes_iterator is an iterable of bytestrings for the file. The
kind of iterable and length of the bytestrings are unspecified, but for
this implementation, it is a list of bytes produced by
VersionedFile.get_record_stream().
:param desired_files: a list of (file_id, revision_id, identifier)
triples
"""
per_revision = {}
for (file_id, revision_id, identifier) in desired_files:
per_revision.setdefault(revision_id, []).append(
(file_id, identifier))
for revid, files in viewitems(per_revision):
try:
(commit_id, mapping) = self.lookup_bzr_revision_id(revid)
except errors.NoSuchRevision:
raise errors.RevisionNotPresent(revid, self)
try:
commit = self._git.object_store[commit_id]
except KeyError:
raise errors.RevisionNotPresent(revid, self)
root_tree = commit.tree
for fileid, identifier in files:
try:
path = mapping.parse_file_id(fileid)
except ValueError:
raise errors.RevisionNotPresent((fileid, revid), self)
try:
obj = tree_lookup_path(
self._git.object_store.__getitem__, root_tree,
path.encode('utf-8'))
if isinstance(obj, tuple):
(mode, item_id) = obj
obj = self._git.object_store[item_id]
except KeyError:
raise errors.RevisionNotPresent((fileid, revid), self)
else:
if obj.type_name == b"tree":
yield (identifier, [])
elif obj.type_name == b"blob":
yield (identifier, obj.chunked)
else:
raise AssertionError("file text resolved to %r" % obj)
def gather_stats(self, revid=None, committers=None):
"""See Repository.gather_stats()."""
result = super(LocalGitRepository, self).gather_stats(
revid, committers)
revs = []
for sha in self._git.object_store:
o = self._git.object_store[sha]
if o.type_name == b"commit":
revs.append(o.id)
result['revisions'] = len(revs)
return result
def _iter_revision_ids(self):
mapping = self.get_mapping()
for sha in self._git.object_store:
o = self._git.object_store[sha]
if not isinstance(o, Commit):
continue
revid = mapping.revision_id_foreign_to_bzr(o.id)
yield o.id, revid
def all_revision_ids(self):
ret = set()
for git_sha, revid in self._iter_revision_ids():
ret.add(revid)
return list(ret)
def _get_parents(self, revid, no_alternates=False):
if type(revid) != bytes:
raise ValueError
try:
(hexsha, mapping) = self.lookup_bzr_revision_id(revid)
except errors.NoSuchRevision:
return None
# FIXME: Honor no_alternates setting
try:
commit = self._git.object_store[hexsha]
except KeyError:
return None
ret = []
for p in commit.parents:
try:
ret.append(self.lookup_foreign_revision_id(p, mapping))
except KeyError:
ret.append(mapping.revision_id_foreign_to_bzr(p))
return ret
def _get_parent_map_no_fallbacks(self, revids):
return self.get_parent_map(revids, no_alternates=True)
def get_parent_map(self, revids, no_alternates=False):
parent_map = {}
for revision_id in revids:
parents = self._get_parents(
revision_id, no_alternates=no_alternates)
if revision_id == _mod_revision.NULL_REVISION:
parent_map[revision_id] = ()
continue
if parents is None:
continue
if len(parents) == 0:
parents = [_mod_revision.NULL_REVISION]
parent_map[revision_id] = tuple(parents)
return parent_map
def get_known_graph_ancestry(self, revision_ids):
"""Return the known graph for a set of revision ids and their ancestors.
"""
pending = set(revision_ids)
parent_map = {}
while pending:
this_parent_map = {}
for revid in pending:
if revid == _mod_revision.NULL_REVISION:
continue
parents = self._get_parents(revid)
if parents is not None:
this_parent_map[revid] = parents
parent_map.update(this_parent_map)
pending = set()
for values in viewvalues(this_parent_map):
pending.update(values)
pending = pending.difference(parent_map)
return _mod_graph.KnownGraph(parent_map)
def get_signature_text(self, revision_id):
git_commit_id, mapping = self.lookup_bzr_revision_id(revision_id)
try:
commit = self._git.object_store[git_commit_id]
except KeyError:
raise errors.NoSuchRevision(self, revision_id)
if commit.gpgsig is None:
raise errors.NoSuchRevision(self, revision_id)
return commit.gpgsig
def check(self, revision_ids=None, callback_refs=None, check_repo=True):
result = GitCheck(self, check_repo=check_repo)
result.check(callback_refs)
return result
def pack(self, hint=None, clean_obsolete_packs=False):
self._git.object_store.pack_loose_objects()
def lookup_foreign_revision_id(self, foreign_revid, mapping=None):
"""Lookup a revision id.
:param foreign_revid: Foreign revision id to look up
:param mapping: Mapping to use (use default mapping if not specified)
:raise KeyError: If foreign revision was not found
:return: bzr revision id
"""
if not isinstance(foreign_revid, bytes):
raise TypeError(foreign_revid)
if mapping is None:
mapping = self.get_mapping()
if foreign_revid == ZERO_SHA:
return _mod_revision.NULL_REVISION
commit = self._git.object_store.peel_sha(foreign_revid)
if not isinstance(commit, Commit):
raise NotCommitError(commit.id)
revid = mapping.get_revision_id(commit)
# FIXME: check testament before doing this?
return revid
def has_signature_for_revision_id(self, revision_id):
"""Check whether a GPG signature is present for this revision.
This is never the case for Git repositories.
"""
try:
self.get_signature_text(revision_id)
except errors.NoSuchRevision:
return False
else:
return True
def verify_revision_signature(self, revision_id, gpg_strategy):
"""Verify the signature on a revision.
:param revision_id: the revision to verify
:gpg_strategy: the GPGStrategy object to used
:return: gpg.SIGNATURE_VALID or a failed SIGNATURE_ value
"""
from breezy import gpg
with self.lock_read():
git_commit_id, mapping = self.lookup_bzr_revision_id(revision_id)
try:
commit = self._git.object_store[git_commit_id]
except KeyError:
raise errors.NoSuchRevision(self, revision_id)
if commit.gpgsig is None:
return gpg.SIGNATURE_NOT_SIGNED, None
without_sig = Commit.from_string(commit.as_raw_string())
without_sig.gpgsig = None
(result, key, plain_text) = gpg_strategy.verify(
without_sig.as_raw_string(), commit.gpgsig)
return (result, key)
def lookup_bzr_revision_id(self, bzr_revid, mapping=None):
"""Lookup a bzr revision id in a Git repository.
:param bzr_revid: Bazaar revision id
:param mapping: Optional mapping to use
:return: Tuple with git commit id, mapping that was used and supplement
details
"""
try:
(git_sha, mapping) = mapping_registry.revision_id_bzr_to_foreign(
bzr_revid)
except errors.InvalidRevisionId:
raise errors.NoSuchRevision(self, bzr_revid)
else:
return (git_sha, mapping)
def get_revision(self, revision_id):
if not isinstance(revision_id, bytes):
raise errors.InvalidRevisionId(revision_id, self)
git_commit_id, mapping = self.lookup_bzr_revision_id(revision_id)
try:
commit = self._git.object_store[git_commit_id]
except KeyError:
raise errors.NoSuchRevision(self, revision_id)
revision, roundtrip_revid, verifiers = mapping.import_commit(
commit, self.lookup_foreign_revision_id, strict=False)
if revision is None:
raise AssertionError
# FIXME: check verifiers ?
if roundtrip_revid:
revision.revision_id = roundtrip_revid
return revision
def has_revision(self, revision_id):
"""See Repository.has_revision."""
if revision_id == _mod_revision.NULL_REVISION:
return True
try:
git_commit_id, mapping = self.lookup_bzr_revision_id(revision_id)
except errors.NoSuchRevision:
return False
return (git_commit_id in self._git)
def has_revisions(self, revision_ids):
"""See Repository.has_revisions."""
return set(filter(self.has_revision, revision_ids))
def iter_revisions(self, revision_ids):
"""See Repository.get_revisions."""
for revid in revision_ids:
try:
rev = self.get_revision(revid)
except errors.NoSuchRevision:
rev = None
yield (revid, rev)
def revision_trees(self, revids):
"""See Repository.revision_trees."""
for revid in revids:
yield self.revision_tree(revid)
def revision_tree(self, revision_id):
"""See Repository.revision_tree."""
if revision_id is None:
raise ValueError('invalid revision id %s' % revision_id)
return GitRevisionTree(self, revision_id)
def get_deltas_for_revisions(self, revisions, specific_fileids=None):
"""Produce a generator of revision deltas.
Note that the input is a sequence of REVISIONS, not revision_ids.
Trees will be held in memory until the generator exits.
Each delta is relative to the revision's lefthand predecessor.
:param specific_fileids: if not None, the result is filtered
so that only those file-ids, their parents and their
children are included.
"""
# Get the revision-ids of interest
required_trees = set()
for revision in revisions:
required_trees.add(revision.revision_id)
required_trees.update(revision.parent_ids[:1])
trees = dict((t.get_revision_id(), t) for
t in self.revision_trees(required_trees))
# Calculate the deltas
for revision in revisions:
if not revision.parent_ids:
old_tree = self.revision_tree(_mod_revision.NULL_REVISION)
else:
old_tree = trees[revision.parent_ids[0]]
new_tree = trees[revision.revision_id]
if specific_fileids is not None:
specific_files = [new_tree.id2path(
fid) for fid in specific_fileids]
else:
specific_files = None
yield new_tree.changes_from(
old_tree, specific_files=specific_files)
def set_make_working_trees(self, trees):
raise errors.UnsupportedOperation(self.set_make_working_trees, self)
def fetch_objects(self, determine_wants, graph_walker, resolve_ext_ref,
progress=None, limit=None):
return self._git.fetch_objects(determine_wants, graph_walker, progress,
limit=limit)
class GitRepositoryFormat(repository.RepositoryFormat):
"""Git repository format."""
supports_versioned_directories = False
supports_tree_reference = True
rich_root_data = True
supports_leaving_lock = False
fast_deltas = True
supports_funky_characters = True
supports_external_lookups = False
supports_full_versioned_files = False
supports_revision_signatures = False
supports_nesting_repositories = False
revision_graph_can_have_wrong_parents = False
supports_unreferenced_revisions = True
supports_setting_revision_ids = False
supports_storing_branch_nick = False
supports_overriding_transport = False
supports_custom_revision_properties = False
records_per_file_revision = False
@property
def _matchingcontroldir(self):
from .dir import LocalGitControlDirFormat
return LocalGitControlDirFormat()
def get_format_description(self):
return "Git Repository"
def initialize(self, controldir, shared=False, _internal=False):
from .dir import GitDir
if not isinstance(controldir, GitDir):
raise errors.UninitializableFormat(self)
return controldir.open_repository()
def check_conversion_target(self, target_repo_format):
return target_repo_format.rich_root_data
def get_foreign_tests_repository_factory(self):
from .tests.test_repository import (
ForeignTestsRepositoryFactory,
)
return ForeignTestsRepositoryFactory()
def network_name(self):
return b"git"
def get_extra_interrepo_test_combinations():
from ..bzr.groupcompress_repo import RepositoryFormat2a
from . import interrepo
return [
(interrepo.InterLocalGitNonGitRepository,
GitRepositoryFormat(), RepositoryFormat2a()),
(interrepo.InterLocalGitLocalGitRepository,
GitRepositoryFormat(), GitRepositoryFormat()),
(interrepo.InterToLocalGitRepository,
RepositoryFormat2a(), GitRepositoryFormat()),
]