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"""Map from Git sha's to Bazaar objects."""
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from bzrlib.errors import NoSuchRevision
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from bzrlib.plugins.git.mapping import (
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inventory_to_tree_and_blobs,
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from bzrlib.plugins.git.shamap import GitShaMap
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from dulwich.objects import (
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class GitObjectConverter(object):
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from dulwich.object_store import (
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from bzrlib.revision import (
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from bzrlib.plugins.git.mapping import (
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extract_unusual_modes,
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from bzrlib.plugins.git.shamap import (
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from_repository as idmap_from_repository,
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def get_object_store(repo, mapping=None):
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git = getattr(repo, "_git", None)
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return git.object_store
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return BazaarObjectStore(repo, mapping)
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class BazaarObjectStore(BaseObjectStore):
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"""A Git-style object store backed onto a Bazaar repository."""
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def __init__(self, repository, mapping=None):
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self.repository = repository
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if mapping is None:
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self.mapping = self.repository.get_mapping()
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self.mapping = default_mapping
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self.mapping = mapping
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self._idmap = GitShaMap(self.repository._transport)
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self._idmap = idmap_from_repository(repository)
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self.start_write_group = self._idmap.start_write_group
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self.abort_write_group = self._idmap.abort_write_group
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self.commit_write_group = self._idmap.commit_write_group
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def _update_sha_map(self):
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all_revids = self.repository.all_revision_ids()
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def _update_sha_map(self, stop_revision=None):
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graph = self.repository.get_graph()
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present_revids = set(self._idmap.revids())
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pb = ui.ui_factory.nested_progress_bar()
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if stop_revision is None:
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heads = graph.heads(self.repository.all_revision_ids())
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heads = set([stop_revision])
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missing_revids = self._idmap.missing_revisions(heads)
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parents = graph.get_parent_map(heads)
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for p in parents.values():
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todo.update([x for x in p if x not in missing_revids])
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heads = self._idmap.missing_revisions(todo)
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missing_revids.update(heads)
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if NULL_REVISION in missing_revids:
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missing_revids.remove(NULL_REVISION)
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missing_revids = self.repository.has_revisions(missing_revids)
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if not missing_revids:
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self.start_write_group()
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for i, revid in enumerate(graph.iter_topo_order(all_revids)):
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if revid in present_revids:
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pb.update("updating git map", i, len(all_revids))
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self._update_sha_map_revision(revid)
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pb = ui.ui_factory.nested_progress_bar()
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for i, revid in enumerate(graph.iter_topo_order(missing_revids)):
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trace.mutter('processing %r', revid)
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pb.update("updating git map", i, len(missing_revids))
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self._update_sha_map_revision(revid)
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self.abort_write_group()
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self.commit_write_group()
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self._update_sha_map()
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return iter(self._idmap.sha1s())
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def _revision_to_commit(self, rev, tree_sha):
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def parent_lookup(revid):
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return self._lookup_revision_sha1(revid)
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except errors.NoSuchRevision:
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trace.warning("Ignoring ghost parent %s", revid)
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return self.mapping.export_commit(rev, tree_sha, parent_lookup)
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def _update_sha_map_revision(self, revid):
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inv = self.repository.get_inventory(revid)
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objects = inventory_to_tree_and_blobs(self.repository, self.mapping, revid)
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for sha, o, path in objects:
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ie = inv[inv.path2id(path)]
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if ie.kind in ("file", "symlink"):
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self._idmap.add_entry(sha, "blob", (ie.file_id, ie.revision))
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rev = self.repository.get_revision(revid)
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unusual_modes = extract_unusual_modes(rev)
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tree_sha = self._get_ie_sha1(inv.root, inv, unusual_modes)
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commit_obj = self._revision_to_commit(rev, tree_sha)
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foreign_revid, mapping = mapping_registry.parse_revision_id(revid)
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except errors.InvalidRevisionId:
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if foreign_revid != commit_obj.id:
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if not "fix-shamap" in debug.debug_flags:
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raise AssertionError("recreated git commit had different sha1: expected %s, got %s" % (foreign_revid, commit_obj.id))
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self._idmap.add_entry(commit_obj.id, "commit", (revid, tree_sha))
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def _check_expected_sha(self, expected_sha, object):
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if expected_sha is None:
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if len(expected_sha) == 40:
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if expected_sha != object.sha().hexdigest():
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raise AssertionError("Invalid sha for %r: %s" % (object, expected_sha))
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elif len(expected_sha) == 20:
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if expected_sha != object.sha().digest():
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raise AssertionError("Invalid sha for %r: %s" % (object, sha_to_hex(expected_sha)))
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raise AssertionError("Unknown length %d for %r" % (len(expected_sha), expected_sha))
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def _get_ie_object(self, entry, inv, unusual_modes):
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if entry.kind == "directory":
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return self._get_tree(entry.file_id, inv.revision_id, inv,
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elif entry.kind == "symlink":
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return self._get_blob_for_symlink(entry.symlink_target)
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elif entry.kind == "file":
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return self._get_blob_for_file(entry.file_id, entry.revision)
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raise AssertionError("unknown entry kind '%s'" % entry.kind)
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def _get_ie_object_or_sha1(self, entry, inv, unusual_modes):
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invshamap = self._idmap.get_inventory_sha_map(inv.revision_id)
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if entry.kind == "directory":
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return invshamap.lookup_tree(entry.file_id), None
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except (KeyError, NotImplementedError):
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ret = self._get_ie_object(entry, inv, unusual_modes)
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self._idmap.add_entry(hexsha, "tree",
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(entry.file_id, inv.revision_id))
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elif entry.kind in ("file", "symlink"):
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return invshamap.lookup_blob(entry.file_id, entry.revision), None
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ret = self._get_ie_object(entry, inv, unusual_modes)
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self._idmap.add_entry(ret.id, "blob", (entry.file_id,
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raise AssertionError("unknown entry kind '%s'" % entry.kind)
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def _get_ie_sha1(self, entry, inv, unusual_modes):
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return self._get_ie_object_or_sha1(entry, inv, unusual_modes)[0]
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def _get_blob_for_symlink(self, symlink_target, expected_sha=None):
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"""Return a Git Blob object for symlink.
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:param symlink_target: target of symlink.
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if type(symlink_target) == unicode:
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symlink_target = symlink_target.encode('utf-8')
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blob._text = symlink_target
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self._check_expected_sha(expected_sha, blob)
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def _get_blob_for_file(self, fileid, revision, expected_sha=None):
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"""Return a Git Blob object from a fileid and revision stored in bzr.
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:param fileid: File id of the text
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:param revision: Revision of the text
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chunks = self.repository.iter_files_bytes([(fileid, revision, None)]).next()[1]
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blob._text = "".join(chunks)
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self._check_expected_sha(expected_sha, blob)
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def _get_blob(self, fileid, revision, expected_sha=None):
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"""Return a Git Blob object from a fileid and revision stored in bzr.
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:param fileid: File id of the text
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:param revision: Revision of the text
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inv = self.repository.get_inventory(revision)
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if entry.kind == 'file':
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return self._get_blob_for_file(entry.file_id, entry.revision,
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expected_sha=expected_sha)
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elif entry.kind == 'symlink':
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return self._get_blob_for_symlink(entry.symlink_target,
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expected_sha=expected_sha)
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def _get_tree(self, fileid, revid, inv, unusual_modes, expected_sha=None):
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"""Return a Git Tree object from a file id and a revision stored in bzr.
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:param fileid: fileid in the tree.
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:param revision: Revision of the tree.
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tree = directory_to_tree(inv[fileid],
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lambda ie: self._get_ie_sha1(ie, inv, unusual_modes),
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self._check_expected_sha(expected_sha, tree)
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def _get_commit(self, rev, tree_sha, expected_sha=None):
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commit = self._revision_to_commit(rev, tree_sha)
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self._check_expected_sha(expected_sha, commit)
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def get_parents(self, sha):
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"""Retrieve the parents of a Git commit by SHA1.
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:param sha: SHA1 of the commit
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:raises: KeyError, NotCommitError
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return self[sha].parents
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def _lookup_revision_sha1(self, revid):
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"""Return the SHA1 matching a Bazaar revision."""
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if revid == NULL_REVISION:
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return self._idmap.lookup_commit(revid)
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return mapping_registry.parse_revision_id(revid)[0]
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except errors.InvalidRevisionId:
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self._update_sha_map(revid)
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return self._idmap.lookup_commit(revid)
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def get_raw(self, sha):
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"""Get the raw representation of a Git object by SHA1.
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:param sha: SHA1 of the git object
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return (obj.type, obj.as_raw_string())
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def __contains__(self, sha):
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# See if sha is in map
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(type, type_data) = self._lookup_git_sha(sha)
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return self.repository.has_revision(type_data[0])
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return self.repository.texts.has_version(type_data)
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return self.repository.has_revision(type_data[1])
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self._idmap.add_entry(sha, "tree", (ie.file_id, ie.revision))
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rev = self.repository.get_revision(revid)
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commit_obj = revision_to_commit(rev, tree_sha, self._idmap._parent_lookup)
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self._idmap.add_entry(commit_obj.sha().hexdigest(), "commit", (revid, tree_sha))
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def _get_blob(self, fileid, revision):
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text = self.repository.texts.get_record_stream([(fileid, revision)], "unordered", True).next().get_bytes_as("fulltext")
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def _get_tree(self, fileid, revid):
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raise NotImplementedError(self._get_tree)
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def _get_commit(self, revid, tree_sha):
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rev = self.repository.get_revision(revid)
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return revision_to_commit(rev, tree_sha, self._idmap._parent_lookup)
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def __getitem__(self, sha):
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raise AssertionError("Unknown object type '%s'" % type)
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def _lookup_git_sha(self, sha):
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# See if sha is in map
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(type, type_data) = self._idmap.lookup_git_sha(sha)
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return self._idmap.lookup_git_sha(sha)
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# if not, see if there are any unconverted revisions and add them
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# if not, see if there are any unconverted revisions and add them
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# to the map, search for sha in map again
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self._update_sha_map()
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(type, type_data) = self._idmap.lookup_git_sha(sha)
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return self._idmap.lookup_git_sha(sha)
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def __getitem__(self, sha):
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(type, type_data) = self._lookup_git_sha(sha)
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# convert object to git object
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if type == "commit":
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return self._get_commit(*type_data)
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rev = self.repository.get_revision(type_data[0])
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except errors.NoSuchRevision:
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trace.mutter('entry for %s %s in shamap: %r, but not found in repository', type, sha, type_data)
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return self._get_commit(rev, type_data[1], expected_sha=sha)
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elif type == "blob":
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return self._get_blob(*type_data)
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return self._get_blob(type_data[0], type_data[1], expected_sha=sha)
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elif type == "tree":
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return self._get_tree(*type_data)
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inv = self.repository.get_inventory(type_data[1])
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rev = self.repository.get_revision(type_data[1])
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except errors.NoSuchRevision:
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trace.mutter('entry for %s %s in shamap: %r, but not found in repository', type, sha, type_data)
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unusual_modes = extract_unusual_modes(rev)
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return self._get_tree(type_data[0], type_data[1], inv,
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unusual_modes, expected_sha=sha)
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except errors.NoSuchRevision:
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raise AssertionError("Unknown object type '%s'" % type)