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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from bzrlib import osutils, ui, urlutils
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from bzrlib.errors import InvalidRevisionId
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from bzrlib.inventory import Inventory
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from bzrlib.repository import InterRepository
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from bzrlib.trace import info
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from bzrlib.tsort import topo_sort
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from bzrlib.plugins.git import git
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from dulwich.objects import (
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from dulwich.object_store import (
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from itertools import (
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from bzrlib.errors import (
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from bzrlib.inventory import (
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from bzrlib.repository import (
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from bzrlib.revision import (
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from bzrlib.revisiontree import (
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from bzrlib.tsort import (
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from bzrlib.versionedfile import (
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ChunkedContentFactory,
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from bzrlib.plugins.git.mapping import (
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from bzrlib.plugins.git.object_store import (
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from bzrlib.plugins.git.remote import (
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from bzrlib.plugins.git.repository import (
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from bzrlib.plugins.git.remote import RemoteGitRepository
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from dulwich.objects import Commit
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from cStringIO import StringIO
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class BzrFetchGraphWalker(object):
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def __init__(self, repository, mapping):
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self.repository = repository
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self.mapping = mapping
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self.heads = set(repository.all_revision_ids())
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revid = self.mapping.revision_id_foreign_to_bzr(sha)
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def remove(self, revid):
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self.heads.remove(revid)
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if revid in self.parents:
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for p in self.parents[revid]:
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ret = self.heads.pop()
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ps = self.repository.get_parent_map([ret])[ret]
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self.parents[ret] = ps
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self.heads.update([p for p in ps if not p in self.done])
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return self.mapping.revision_id_bzr_to_foreign(ret)
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except InvalidRevisionId:
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def import_git_blob(repo, mapping, path, blob, inv, parent_invs, executable):
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def import_git_blob(texts, mapping, path, name, (base_hexsha, hexsha),
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base_inv, parent_id, revision_id,
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parent_invs, lookup_object, (base_mode, mode), store_updater,
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"""Import a git blob object into a bzr repository.
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:param repo: bzr repository
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:param texts: VersionedFiles to add to
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:param path: Path in the tree
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:param blob: A git blob
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file_id = mapping.generate_file_id(path)
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text_revision = inv.revision_id
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repo.texts.add_lines((file_id, text_revision),
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[(file_id, p[file_id].revision) for p in parent_invs if file_id in p],
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osutils.split_lines(blob.data))
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ie = inv.add_path(path, "file", file_id)
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ie.revision = text_revision
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ie.text_size = len(blob.data)
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ie.text_sha1 = osutils.sha_string(blob.data)
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ie.executable = executable
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def import_git_tree(repo, mapping, path, tree, inv, parent_invs, lookup_object):
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:return: Inventory delta for this file
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if mapping.is_control_file(path):
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if base_hexsha == hexsha and base_mode == mode:
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# If nothing has changed since the base revision, we're done
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file_id = lookup_file_id(path)
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if stat.S_ISLNK(mode):
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ie = cls(file_id, name.decode("utf-8"), parent_id)
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ie.executable = mode_is_executable(mode)
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if base_hexsha == hexsha and mode_kind(base_mode) == mode_kind(mode):
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base_ie = base_inv[base_inv.path2id(path)]
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ie.text_size = base_ie.text_size
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ie.text_sha1 = base_ie.text_sha1
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ie.symlink_target = base_ie.symlink_target
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if ie.executable == base_ie.executable:
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ie.revision = base_ie.revision
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blob = lookup_object(hexsha)
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blob = lookup_object(hexsha)
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if ie.kind == "symlink":
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ie.symlink_target = blob.data
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ie.text_size = sum(imap(len, blob.chunked))
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ie.text_sha1 = osutils.sha_strings(blob.chunked)
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# Check what revision we should store
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for pinv in parent_invs:
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if (pie.text_sha1 == ie.text_sha1 and
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pie.executable == ie.executable and
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pie.symlink_target == ie.symlink_target):
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# found a revision in one of the parents to use
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ie.revision = pie.revision
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parent_key = (file_id, pie.revision)
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if not parent_key in parent_keys:
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parent_keys.append(parent_key)
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if ie.revision is None:
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# Need to store a new revision
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ie.revision = revision_id
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assert ie.revision is not None
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if ie.kind == 'symlink':
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chunks = blob.chunked
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texts.insert_record_stream([
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ChunkedContentFactory((file_id, ie.revision),
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tuple(parent_keys), ie.text_sha1, chunks)])
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if base_hexsha is not None:
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old_path = path.decode("utf-8") # Renames are not supported yet
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if stat.S_ISDIR(base_mode):
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invdelta.extend(remove_disappeared_children(base_inv, old_path,
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lookup_object(base_hexsha), [], lookup_object))
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new_path = path.decode("utf-8")
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invdelta.append((old_path, new_path, file_id, ie))
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if base_hexsha != hexsha:
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store_updater.add_object(blob, ie, path)
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class SubmodulesRequireSubtrees(BzrError):
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_fmt = """The repository you are fetching from contains submodules. To continue, upgrade your Bazaar repository to a format that supports nested trees, such as 'development-subtree'."""
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def import_git_submodule(texts, mapping, path, name, (base_hexsha, hexsha),
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base_inv, parent_id, revision_id, parent_invs, lookup_object,
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(base_mode, mode), store_updater, lookup_file_id):
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if base_hexsha == hexsha and base_mode == mode:
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file_id = lookup_file_id(path)
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ie = TreeReference(file_id, name.decode("utf-8"), parent_id)
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ie.revision = revision_id
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if base_hexsha is None:
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ie.reference_revision = mapping.revision_id_foreign_to_bzr(hexsha)
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texts.insert_record_stream([
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ChunkedContentFactory((file_id, ie.revision), (), None, [])])
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invdelta = [(oldpath, path, file_id, ie)]
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def remove_disappeared_children(base_inv, path, base_tree, existing_children,
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"""Generate an inventory delta for removed children.
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:param base_inv: Base inventory against which to generate the
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:param path: Path to process (unicode)
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:param base_tree: Git Tree base object
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:param existing_children: Children that still exist
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:param lookup_object: Lookup a git object by its SHA1
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:return: Inventory delta, as list
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assert type(path) is unicode
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for name, mode, hexsha in base_tree.iteritems():
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if name in existing_children:
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c_path = posixpath.join(path, name.decode("utf-8"))
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file_id = base_inv.path2id(c_path)
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assert file_id is not None
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ret.append((c_path, None, file_id, None))
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if stat.S_ISDIR(mode):
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ret.extend(remove_disappeared_children(
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base_inv, c_path, lookup_object(hexsha), [], lookup_object))
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def import_git_tree(texts, mapping, path, name, (base_hexsha, hexsha),
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base_inv, parent_id, revision_id, parent_invs,
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lookup_object, (base_mode, mode), store_updater,
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lookup_file_id, allow_submodules=False):
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"""Import a git tree object into a bzr repository.
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:param repo: A Bzr repository object
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:param path: Path in the tree
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:param texts: VersionedFiles object to add to
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:param path: Path in the tree (str)
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:param name: Name of the tree (str)
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:param tree: A git tree object
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:param inv: Inventory object
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:param base_inv: Base inventory against which to return inventory delta
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:return: Inventory delta for this subtree
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file_id = mapping.generate_file_id(path)
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text_revision = inv.revision_id
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repo.texts.add_lines((file_id, text_revision),
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[(file_id, p[file_id].revision) for p in parent_invs if file_id in p],
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ie = inv.add_path(path, "directory", file_id)
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ie.revision = text_revision
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for mode, name, hexsha in tree.entries():
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entry_kind = (mode & 0700000) / 0100000
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basename = name.decode("utf-8")
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child_path = urlutils.join(path, name)
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tree = lookup_object(hexsha)
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import_git_tree(repo, mapping, child_path, tree, inv, parent_invs, lookup_object)
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elif entry_kind == 1:
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blob = lookup_object(hexsha)
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fs_mode = mode & 0777
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import_git_blob(repo, mapping, child_path, blob, inv, parent_invs, bool(fs_mode & 0111))
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raise AssertionError("Unknown blob kind, perms=%r." % (mode,))
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def import_git_objects(repo, mapping, object_iter, pb=None):
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assert type(path) is str
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assert type(name) is str
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if base_hexsha == hexsha and base_mode == mode:
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# If nothing has changed since the base revision, we're done
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file_id = lookup_file_id(path)
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# We just have to hope this is indeed utf-8:
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ie = InventoryDirectory(file_id, name.decode("utf-8"), parent_id)
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tree = lookup_object(hexsha)
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if base_hexsha is None:
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old_path = None # Newly appeared here
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base_tree = lookup_object(base_hexsha)
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old_path = path.decode("utf-8") # Renames aren't supported yet
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new_path = path.decode("utf-8")
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if base_tree is None or type(base_tree) is not Tree:
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ie.revision = revision_id
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invdelta.append((old_path, new_path, ie.file_id, ie))
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texts.insert_record_stream([
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ChunkedContentFactory((ie.file_id, ie.revision), (), None, [])])
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# Remember for next time
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existing_children = set()
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for child_mode, name, child_hexsha in tree.entries():
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existing_children.add(name)
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child_path = posixpath.join(path, name)
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if type(base_tree) is Tree:
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child_base_mode, child_base_hexsha = base_tree[name]
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child_base_hexsha = None
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child_base_hexsha = None
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if stat.S_ISDIR(child_mode):
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subinvdelta, grandchildmodes = import_git_tree(texts, mapping,
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child_path, name, (child_base_hexsha, child_hexsha), base_inv,
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file_id, revision_id, parent_invs, lookup_object,
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(child_base_mode, child_mode), store_updater, lookup_file_id,
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allow_submodules=allow_submodules)
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elif S_ISGITLINK(child_mode): # submodule
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if not allow_submodules:
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raise SubmodulesRequireSubtrees()
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subinvdelta, grandchildmodes = import_git_submodule(texts, mapping,
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child_path, name, (child_base_hexsha, child_hexsha), base_inv,
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file_id, revision_id, parent_invs, lookup_object,
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(child_base_mode, child_mode), store_updater, lookup_file_id)
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subinvdelta = import_git_blob(texts, mapping, child_path, name,
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(child_base_hexsha, child_hexsha), base_inv, file_id,
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revision_id, parent_invs, lookup_object,
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(child_base_mode, child_mode), store_updater, lookup_file_id)
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child_modes.update(grandchildmodes)
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invdelta.extend(subinvdelta)
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if child_mode not in (stat.S_IFDIR, DEFAULT_FILE_MODE,
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stat.S_IFLNK, DEFAULT_FILE_MODE|0111):
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child_modes[child_path] = child_mode
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# Remove any children that have disappeared
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if base_tree is not None and type(base_tree) is Tree:
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invdelta.extend(remove_disappeared_children(base_inv, old_path,
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base_tree, existing_children, lookup_object))
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store_updater.add_object(tree, ie, path)
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return invdelta, child_modes
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def verify_commit_reconstruction(target_git_object_retriever, lookup_object,
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o, rev, ret_tree, parent_trees, mapping, unusual_modes):
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new_unusual_modes = mapping.export_unusual_file_modes(rev)
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if new_unusual_modes != unusual_modes:
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raise AssertionError("unusual modes don't match: %r != %r" % (
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unusual_modes, new_unusual_modes))
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# Verify that we can reconstruct the commit properly
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rec_o = target_git_object_retriever._reconstruct_commit(rev, o.tree, True)
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raise AssertionError("Reconstructed commit differs: %r != %r" % (
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for path, obj, ie in _tree_to_objects(ret_tree, parent_trees,
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target_git_object_retriever._cache.idmap, unusual_modes, mapping.BZR_DUMMY_FILE):
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old_obj_id = tree_lookup_path(lookup_object, o.tree, path)[1]
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if obj.id != old_obj_id:
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diff.append((path, lookup_object(old_obj_id), obj))
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for (path, old_obj, new_obj) in diff:
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while (old_obj.type_name == "tree" and
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new_obj.type_name == "tree" and
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sorted(old_obj) == sorted(new_obj)):
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if old_obj[name][0] != new_obj[name][0]:
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raise AssertionError("Modes for %s differ: %o != %o" %
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(path, old_obj[name][0], new_obj[name][0]))
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if old_obj[name][1] != new_obj[name][1]:
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# Found a differing child, delve deeper
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path = posixpath.join(path, name)
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old_obj = lookup_object(old_obj[name][1])
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new_obj = new_objs[path]
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raise AssertionError("objects differ for %s: %r != %r" % (path,
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def import_git_commit(repo, mapping, head, lookup_object,
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target_git_object_retriever, trees_cache):
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o = lookup_object(head)
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rev = mapping.import_commit(o,
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lambda x: target_git_object_retriever.lookup_git_sha(x)[1][0])
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# We have to do this here, since we have to walk the tree and
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# we need to make sure to import the blobs / trees with the right
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# path; this may involve adding them more than once.
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parent_trees = trees_cache.revision_trees(rev.parent_ids)
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if parent_trees == []:
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base_inv = Inventory(root_id=None)
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base_inv = parent_trees[0].inventory
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base_tree = lookup_object(o.parents[0]).tree
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base_mode = stat.S_IFDIR
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store_updater = target_git_object_retriever._get_updater(rev)
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store_updater.add_object(o, None, None)
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fileid_map = mapping.get_fileid_map(lookup_object, o.tree)
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inv_delta, unusual_modes = import_git_tree(repo.texts,
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mapping, "", "", (base_tree, o.tree), base_inv,
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None, rev.revision_id, [p.inventory for p in parent_trees],
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lookup_object, (base_mode, stat.S_IFDIR), store_updater,
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fileid_map.lookup_file_id,
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allow_submodules=getattr(repo._format, "supports_tree_reference", False))
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store_updater.finish()
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if unusual_modes != {}:
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for path, mode in unusual_modes.iteritems():
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warn_unusual_mode(rev.foreign_revid, path, mode)
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mapping.import_unusual_file_modes(rev, unusual_modes)
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basis_id = rev.parent_ids[0]
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basis_id = NULL_REVISION
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rev.inventory_sha1, inv = repo.add_inventory_by_delta(basis_id,
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inv_delta, rev.revision_id, rev.parent_ids, base_inv)
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ret_tree = RevisionTree(repo, inv, rev.revision_id)
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trees_cache.add(ret_tree)
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repo.add_revision(rev.revision_id, rev)
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if "verify" in debug.debug_flags:
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verify_commit_reconstruction(target_git_object_retriever,
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lookup_object, o, rev, ret_tree, parent_trees, mapping,
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def import_git_objects(repo, mapping, object_iter,
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target_git_object_retriever, heads, pb=None, limit=None):
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"""Import a set of git objects into a bzr repository.
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:param repo: Bazaar repository
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:param repo: Target Bazaar repository
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:param mapping: Mapping to use
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:param object_iter: Iterator over Git objects.
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:return: Tuple with pack hints and last imported revision id
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# TODO: a more (memory-)efficient implementation of this
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for i, o in enumerate(object_iter):
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pb.update("fetching objects", i)
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def lookup_object(sha):
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return object_iter[sha]
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return target_git_object_retriever[sha]
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heads = list(set(heads))
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trees_cache = LRUTreeCache(repo)
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# Find and convert commit objects
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for o in objects.itervalues():
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pb.update("finding revisions to fetch", len(graph), None)
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assert isinstance(head, str)
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o = lookup_object(head)
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if isinstance(o, Commit):
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rev = mapping.import_commit(o)
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root_trees[rev.revision_id] = objects[o.tree]
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revisions[rev.revision_id] = rev
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graph.append((rev.revision_id, rev.parent_ids))
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rev = mapping.import_commit(o, lambda x: None)
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if repo.has_revision(rev.revision_id):
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graph.append((o.id, o.parents))
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heads.extend([p for p in o.parents if p not in checked])
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elif isinstance(o, Tag):
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if o.object[1] not in checked:
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heads.append(o.object[1])
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trace.warning("Unable to import head object %r" % o)
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# Order the revisions
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# Create the inventory objects
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for i, revid in enumerate(topo_sort(graph)):
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pb.update("fetching revisions", i, len(graph))
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root_tree = root_trees[revid]
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rev = revisions[revid]
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# We have to do this here, since we have to walk the tree and
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# we need to make sure to import the blobs / trees with the riht
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# path; this may involve adding them more than once.
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inv.revision_id = rev.revision_id
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def lookup_object(sha):
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return reconstruct_git_object(repo, mapping, sha)
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parent_invs = [repo.get_inventory(r) for r in rev.parent_ids]
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import_git_tree(repo, mapping, "", root_tree, inv, parent_invs, lookup_object)
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repo.add_revision(rev.revision_id, rev, inv)
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def reconstruct_git_commit(repo, rev):
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raise NotImplementedError(self.reconstruct_git_commit)
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def reconstruct_git_object(repo, mapping, sha):
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revid = mapping.revision_id_foreign_to_bzr(sha)
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rev = repo.get_revision(revid)
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except NoSuchRevision:
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return reconstruct_git_commit(rev)
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raise KeyError("No such object %s" % sha)
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revision_ids = topo_sort(graph)
434
if limit is not None:
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revision_ids = revision_ids[:limit]
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for offset in range(0, len(revision_ids), batch_size):
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target_git_object_retriever.start_write_group()
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repo.start_write_group()
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for i, head in enumerate(
443
revision_ids[offset:offset+batch_size]):
445
pb.update("fetching revisions", offset+i,
447
import_git_commit(repo, mapping, head, lookup_object,
448
target_git_object_retriever, trees_cache)
451
repo.abort_write_group()
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hint = repo.commit_write_group()
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pack_hints.extend(hint)
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target_git_object_retriever.abort_write_group()
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target_git_object_retriever.commit_write_group()
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return pack_hints, last_imported
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class InterGitRepository(InterRepository):
189
_matching_repo_format = GitFormat()
467
_matching_repo_format = GitRepositoryFormat()
192
470
def _get_repo_format_to_test():
196
474
"""See InterRepository.copy_content."""
197
475
self.fetch(revision_id, pb, find_ghosts=False)
199
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
478
class InterGitNonGitRepository(InterGitRepository):
479
"""Base InterRepository that copies revisions from a Git into a non-Git
482
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
483
mapping=None, fetch_spec=None):
201
484
if mapping is None:
202
485
mapping = self.source.get_mapping()
486
if revision_id is not None:
487
interesting_heads = [revision_id]
488
elif fetch_spec is not None:
489
interesting_heads = fetch_spec.heads
491
interesting_heads = None
493
def determine_wants(refs):
495
if interesting_heads is None:
496
ret = [sha for (ref, sha) in refs.iteritems() if not ref.endswith("^{}")]
498
ret = [self.source.lookup_bzr_revision_id(revid)[0] for revid in interesting_heads if revid not in (None, NULL_REVISION)]
499
return [rev for rev in ret if not self.target.has_revision(self.source.lookup_foreign_revision_id(rev))]
500
(pack_hint, _) = self.fetch_objects(determine_wants, mapping, pb)
501
if pack_hint is not None and self.target._format.pack_compresses:
502
self.target.pack(hint=pack_hint)
506
_GIT_PROGRESS_RE = re.compile(r"(.*?): +(\d+)% \((\d+)/(\d+)\)")
507
def report_git_progress(pb, text):
508
text = text.rstrip("\r\n")
509
g = _GIT_PROGRESS_RE.match(text)
511
(text, pct, current, total) = g.groups()
512
pb.update(text, int(current), int(total))
514
pb.update(text, 0, 0)
517
class InterRemoteGitNonGitRepository(InterGitNonGitRepository):
518
"""InterRepository that copies revisions from a remote Git into a non-Git
521
def get_target_heads(self):
522
# FIXME: This should be more efficient
523
all_revs = self.target.all_revision_ids()
524
parent_map = self.target.get_parent_map(all_revs)
526
map(all_parents.update, parent_map.itervalues())
527
return set(all_revs) - all_parents
529
def fetch_objects(self, determine_wants, mapping, pb=None, limit=None):
203
530
def progress(text):
204
pb.note("git: %s", text)
205
def determine_wants(heads):
206
if revision_id is None:
209
ret = [mapping.revision_id_bzr_to_foreign(revision_id)]
210
return [rev for rev in ret if not self.target.has_revision(mapping.revision_id_foreign_to_bzr(rev))]
211
graph_walker = BzrFetchGraphWalker(self.target, mapping)
531
report_git_progress(pb, text)
532
store = BazaarObjectStore(self.target, mapping)
533
self.target.lock_write()
535
heads = self.get_target_heads()
536
graph_walker = store.get_graph_walker(
537
[store._lookup_revision_sha1(head) for head in heads])
540
def record_determine_wants(heads):
541
wants = determine_wants(heads)
542
recorded_wants.extend(wants)
547
create_pb = pb = ui.ui_factory.nested_progress_bar()
549
objects_iter = self.source.fetch_objects(record_determine_wants,
550
graph_walker, store.get_raw, progress)
551
return import_git_objects(self.target, mapping,
552
objects_iter, store, recorded_wants, pb, limit)
560
def is_compatible(source, target):
561
"""Be compatible with GitRepository."""
562
return (isinstance(source, RemoteGitRepository) and
563
target.supports_rich_root() and
564
not isinstance(target, GitRepository) and
565
target.texts is not None)
568
class InterLocalGitNonGitRepository(InterGitNonGitRepository):
569
"""InterRepository that copies revisions from a local Git into a non-Git
572
def fetch_objects(self, determine_wants, mapping, pb=None, limit=None):
575
wants = determine_wants(self.source._git.get_refs())
214
578
create_pb = pb = ui.ui_factory.nested_progress_bar()
579
target_git_object_retriever = BazaarObjectStore(self.target, mapping)
216
581
self.target.lock_write()
218
self.target.start_write_group()
220
import_git_objects(self.target, mapping,
221
iter(self.source.fetch_objects(determine_wants, graph_walker,
224
self.target.commit_write_group()
583
return import_git_objects(self.target, mapping,
584
self.source._git.object_store,
585
target_git_object_retriever, wants, pb, limit)
226
587
self.target.unlock()
added
removed
fetch.py
