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# Copyright (C) 2008-2010 Jelmer Vernooij <jelmer@samba.org>
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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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 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 InventoryRevisionTree
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except ImportError: # bzr < 2.4
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from bzrlib.revisiontree import RevisionTree as InventoryRevisionTree
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from bzrlib.testament 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.refs import extract_tags
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from bzrlib.plugins.git.remote import (
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from bzrlib.plugins.git.repository import (
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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 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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: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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if ie.kind == "file":
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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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if ie.kind == "symlink":
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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. "
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"To continue, upgrade your Bazaar repository to a format that "
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"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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"""Import a git submodule."""
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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 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 base_inv: Base inventory against which to return inventory delta
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:return: Inventory delta for this subtree
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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 name, child_mode, child_hexsha in tree.iteritems():
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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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if not mapping.is_special_file(name):
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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, verifiers):
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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,
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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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# Note that this uses mapping.revision_id_foreign_to_bzr. If the parents
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# were bzr roundtripped revisions they would be specified in the
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rev, roundtrip_revid, verifiers = mapping.import_commit(
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o, mapping.revision_id_foreign_to_bzr)
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if roundtrip_revid is not None:
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original_revid = rev.revision_id
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rev.revision_id = roundtrip_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 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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tree_supplement = 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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tree_supplement.lookup_file_id,
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allow_submodules=getattr(repo._format, "supports_tree_reference",
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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 = InventoryRevisionTree(repo, inv, rev.revision_id)
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if verifiers and roundtrip_revid is not None:
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if getattr(StrictTestament3, "from_revision_tree", None):
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testament = StrictTestament3(rev, ret_tree)
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testament = StrictTestament3(rev, inv)
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calculated_verifiers = { "testament3-sha1": testament.as_sha1() }
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if calculated_verifiers != verifiers:
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trace.mutter("Testament SHA1 %r for %r did not match %r.",
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calculated_verifiers["testament3-sha1"],
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rev.revision_id, verifiers["testament3-sha1"])
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rev.revision_id = original_revid
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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 = InventoryRevisionTree(repo, inv, rev.revision_id)
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calculated_verifiers = {}
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store_updater.add_object(o, calculated_verifiers, None)
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store_updater.finish()
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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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unusual_modes, verifiers)
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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: 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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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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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, roundtrip_revid, verifiers = mapping.import_commit(o,
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mapping.revision_id_foreign_to_bzr)
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if (repo.has_revision(rev.revision_id) or
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(roundtrip_revid and repo.has_revision(roundtrip_revid))):
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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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revision_ids = topo_sort(graph)
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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(
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revision_ids[offset:offset+batch_size]):
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pb.update("fetching revisions", offset+i,
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import_git_commit(repo, mapping, head, lookup_object,
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target_git_object_retriever, trees_cache)
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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):
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_matching_repo_format = GitRepositoryFormat()
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def _target_has_shas(self, shas):
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raise NotImplementedError(self._target_has_shas)
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def get_determine_wants_heads(self, wants, include_tags=False):
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def determine_wants(refs):
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potential = set(wants)
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[v[1] or v[0] for v in extract_tags(refs).itervalues()])
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return list(potential - self._target_has_shas(potential))
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return determine_wants
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def determine_wants_all(self, refs):
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potential = set([sha for (ref, sha) in refs.iteritems() if not
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ref.endswith("^{}")])
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return list(potential - self._target_has_shas(potential))
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def _get_repo_format_to_test():
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def copy_content(self, revision_id=None, pb=None):
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"""See InterRepository.copy_content."""
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self.fetch(revision_id, pb, find_ghosts=False)
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class InterGitNonGitRepository(InterGitRepository):
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"""Base InterRepository that copies revisions from a Git into a non-Git
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def _target_has_shas(self, shas):
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revids = [self.source.lookup_foreign_revision_id(sha) for sha in shas]
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return self.target.has_revisions(revids)
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def get_determine_wants_revids(self, revids, include_tags=False):
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for revid in set(revids):
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git_sha, mapping = self.source.lookup_bzr_revision_id(revid)
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return self.get_determine_wants_heads(wants,
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include_tags=include_tags)
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def fetch_objects(self, determine_wants, mapping, pb=None, limit=None):
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"""Fetch objects from a remote server.
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:param determine_wants: determine_wants callback
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:param mapping: BzrGitMapping to use
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:param pb: Optional progress bar
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:param limit: Maximum number of commits to import.
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:return: Tuple with pack hint, last imported revision id and remote refs
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raise NotImplementedError(self.fetch_objects)
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def fetch(self, revision_id=None, pb=None, find_ghosts=False,
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mapping=None, fetch_spec=None):
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mapping = self.source.get_mapping()
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if revision_id is not None:
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interesting_heads = [revision_id]
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elif fetch_spec is not None:
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recipe = fetch_spec.get_recipe()
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if recipe[0] in ("search", "proxy-search"):
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interesting_heads = recipe[1]
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raise AssertionError("Unsupported search result type %s" %
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interesting_heads = None
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if interesting_heads is not None:
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determine_wants = self.get_determine_wants_revids(
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interesting_heads, include_tags=False)
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determine_wants = self.determine_wants_all
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(pack_hint, _, remote_refs) = self.fetch_objects(determine_wants,
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if pack_hint is not None and self.target._format.pack_compresses:
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self.target.pack(hint=pack_hint)
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assert isinstance(remote_refs, dict)
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_GIT_PROGRESS_RE = re.compile(r"(.*?): +(\d+)% \((\d+)/(\d+)\)")
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def report_git_progress(pb, text):
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text = text.rstrip("\r\n")
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g = _GIT_PROGRESS_RE.match(text)
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(text, pct, current, total) = g.groups()
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pb.update(text, int(current), int(total))
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pb.update(text, 0, 0)
604
class DetermineWantsRecorder(object):
606
def __init__(self, actual):
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self.remote_refs = {}
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def __call__(self, refs):
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self.remote_refs = refs
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self.wants = self.actual(refs)
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class InterRemoteGitNonGitRepository(InterGitNonGitRepository):
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"""InterRepository that copies revisions from a remote Git into a non-Git
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def get_target_heads(self):
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# FIXME: This should be more efficient
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all_revs = self.target.all_revision_ids()
624
parent_map = self.target.get_parent_map(all_revs)
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map(all_parents.update, parent_map.itervalues())
627
return set(all_revs) - all_parents
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def fetch_objects(self, determine_wants, mapping, pb=None, limit=None):
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"""See `InterGitNonGitRepository`."""
632
report_git_progress(pb, text)
633
store = BazaarObjectStore(self.target, mapping)
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heads = self.get_target_heads()
637
graph_walker = store.get_graph_walker(
638
[store._lookup_revision_sha1(head) for head in heads])
639
wants_recorder = DetermineWantsRecorder(determine_wants)
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create_pb = pb = ui.ui_factory.nested_progress_bar()
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objects_iter = self.source.fetch_objects(
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wants_recorder, graph_walker, store.get_raw,
648
trace.mutter("Importing %d new revisions",
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len(wants_recorder.wants))
650
(pack_hint, last_rev) = import_git_objects(self.target,
651
mapping, objects_iter, store, wants_recorder.wants, pb,
653
return (pack_hint, last_rev, wants_recorder.remote_refs)
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def is_compatible(source, target):
662
"""Be compatible with GitRepository."""
663
if not isinstance(source, RemoteGitRepository):
665
if not target.supports_rich_root():
667
if isinstance(target, GitRepository):
669
if not getattr(target._format, "supports_full_versioned_files", True):
674
class InterLocalGitNonGitRepository(InterGitNonGitRepository):
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"""InterRepository that copies revisions from a local Git into a non-Git
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def fetch_objects(self, determine_wants, mapping, pb=None, limit=None):
679
"""See `InterGitNonGitRepository`."""
680
remote_refs = self.source._git.get_refs()
681
wants = determine_wants(remote_refs)
684
create_pb = pb = ui.ui_factory.nested_progress_bar()
685
target_git_object_retriever = BazaarObjectStore(self.target, mapping)
687
target_git_object_retriever.lock_write()
689
(pack_hint, last_rev) = import_git_objects(self.target,
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mapping, self.source._git.object_store,
691
target_git_object_retriever, wants, pb, limit)
692
return (pack_hint, last_rev, remote_refs)
694
target_git_object_retriever.unlock()
700
def is_compatible(source, target):
701
"""Be compatible with GitRepository."""
702
if not isinstance(source, LocalGitRepository):
704
if not target.supports_rich_root():
706
if isinstance(target, GitRepository):
708
if not getattr(target._format, "supports_full_versioned_files", True):
713
class InterGitGitRepository(InterGitRepository):
714
"""InterRepository that copies between Git repositories."""
716
def fetch_objects(self, determine_wants, mapping, pb=None):
718
trace.note("git: %s", text)
719
graphwalker = self.target._git.get_graph_walker()
720
if (isinstance(self.source, LocalGitRepository) and
721
isinstance(self.target, LocalGitRepository)):
722
refs = self.source._git.fetch(self.target._git, determine_wants,
724
return (None, None, refs)
725
elif (isinstance(self.source, LocalGitRepository) and
726
isinstance(self.target, RemoteGitRepository)):
727
raise NotImplementedError
728
elif (isinstance(self.source, RemoteGitRepository) and
729
isinstance(self.target, LocalGitRepository)):
730
f, commit = self.target._git.object_store.add_thin_pack()
732
refs = self.source.bzrdir.root_transport.fetch_pack(
733
determine_wants, graphwalker, f.write, progress)
735
return (None, None, refs)
742
def _target_has_shas(self, shas):
743
return set([sha for sha in shas if self.target._git.object_store])
745
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
746
mapping=None, fetch_spec=None, branches=None):
748
mapping = self.source.get_mapping()
750
if revision_id is not None:
751
args = [self.source.lookup_bzr_revision_id(revision_id)[0]]
752
elif fetch_spec is not None:
753
recipe = fetch_spec.get_recipe()
754
if recipe[0] in ("search", "proxy-search"):
757
raise AssertionError(
758
"Unsupported search result type %s" % recipe[0])
759
args = [mapping.revision_id_bzr_to_foreign(revid)[0] for revid in
761
if branches is not None:
762
determine_wants = lambda x: [x[y] for y in branches if not x[y] in r.object_store and x[y] != ZERO_SHA]
763
elif fetch_spec is None and revision_id is None:
764
determine_wants = self.determine_wants_all
766
determine_wants = lambda x: [y for y in args if not y in r.object_store and y != ZERO_SHA]
767
wants_recorder = DetermineWantsRecorder(determine_wants)
768
self.fetch_objects(wants_recorder, mapping)
769
return wants_recorder.remote_refs
772
def is_compatible(source, target):
773
"""Be compatible with GitRepository."""
774
return (isinstance(source, GitRepository) and
775
isinstance(target, GitRepository))
777
def get_determine_wants_revids(self, revids, include_tags=False):
779
for revid in set(revids):
780
git_sha, mapping = self.source.lookup_bzr_revision_id(revid)
782
return self.get_determine_wants_heads(wants,
783
include_tags=include_tags)
added
removed
fetch.py
