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# Copyright (C) 2008 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 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.tsort import (
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from bzrlib.versionedfile import (
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FulltextContentFactory,
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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.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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MAX_INV_CACHE_SIZE = 50 * 1024 * 1024
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def import_git_blob(texts, mapping, path, hexsha, base_inv, base_ie, parent_id,
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revision_id, parent_invs, shagitmap, lookup_object, executable, symlink):
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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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file_id = mapping.generate_file_id(path)
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# We just have to hope this is indeed utf-8:
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ie = cls(file_id, urlutils.basename(path).decode("utf-8"), parent_id)
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ie.executable = executable
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# See if this has changed at all
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base_sha = shagitmap.lookup_blob(file_id, base_ie.revision)
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if (base_sha == hexsha and base_ie.executable == ie.executable
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and base_ie.kind == ie.kind):
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# If nothing has changed since the base revision, we're done
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if base_sha == hexsha and base_ie.kind == ie.kind:
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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 = len(blob.data)
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ie.text_sha1 = osutils.sha_string(blob.data)
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# Check what revision we should store
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for pinv in parent_invs:
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if pinv.revision_id == base_inv.revision_id:
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if pie.text_sha1 == ie.text_sha1 and pie.executable == ie.executable and 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_keys.append((file_id, pie.revision))
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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 file_id is not None
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assert ie.revision is not None
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if ie.kind == 'symlink':
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texts.insert_record_stream([FulltextContentFactory((file_id, ie.revision), tuple(parent_keys), ie.text_sha1, data)])
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shamap = [(hexsha, "blob", (ie.file_id, ie.revision))]
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if base_ie is not None:
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old_path = base_inv.id2path(file_id)
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if base_ie.kind == "directory":
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invdelta.extend(remove_disappeared_children(old_path, base_ie.children, []))
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invdelta.append((old_path, path, file_id, ie))
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return (invdelta, shamap)
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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, hexsha, base_inv, base_ie,
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parent_id, revision_id, parent_invs, shagitmap, lookup_object):
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file_id = mapping.generate_file_id(path)
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ie = TreeReference(file_id, urlutils.basename(path.decode("utf-8")),
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ie.revision = revision_id
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if (base_ie.kind == ie.kind and
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base_ie.reference_revision == ie.reference_revision):
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ie.revision = base_ie.revision
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ie.reference_revision = mapping.revision_id_foreign_to_bzr(hexsha)
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texts.insert_record_stream([FulltextContentFactory((file_id, ie.revision), (), None, "")])
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invdelta = [(oldpath, path, file_id, ie)]
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return invdelta, {}, {}
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def remove_disappeared_children(path, base_children, existing_children):
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deletable = [(osutils.pathjoin(path, k), v) for k,v in base_children.iteritems() if k not in existing_children]
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(path, ie) = deletable.pop()
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ret.append((path, None, ie.file_id, None))
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if ie.kind == "directory":
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for name, child_ie in ie.children.iteritems():
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deletable.append((osutils.pathjoin(path, name), child_ie))
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def import_git_tree(texts, mapping, path, hexsha, base_inv, base_ie, parent_id,
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revision_id, parent_invs, shagitmap, lookup_object, 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
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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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file_id = mapping.generate_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, urlutils.basename(path.decode("utf-8")),
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# Newly appeared here
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ie.revision = revision_id
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texts.insert_record_stream([FulltextContentFactory((file_id, ie.revision), (), None, "")])
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invdelta.append((None, path, file_id, ie))
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# See if this has changed at all
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base_sha = shagitmap.lookup_tree(file_id, base_inv.revision_id)
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if base_sha == hexsha:
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# If nothing has changed since the base revision, we're done
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if base_ie.kind != "directory":
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ie.revision = revision_id
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texts.insert_record_stream([FulltextContentFactory((ie.file_id, ie.revision), (), None, "")])
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invdelta.append((base_inv.id2path(ie.file_id), path, ie.file_id, ie))
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if base_ie is not None and base_ie.kind == "directory":
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base_children = base_ie.children
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# Remember for next time
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existing_children = set()
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tree = lookup_object(hexsha)
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for mode, name, child_hexsha in tree.entries():
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basename = name.decode("utf-8")
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existing_children.add(basename)
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child_path = osutils.pathjoin(path, name)
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if stat.S_ISDIR(mode):
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subinvdelta, grandchildmodes, subshamap = import_git_tree(
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texts, mapping, child_path, child_hexsha, base_inv,
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base_children.get(basename), file_id, revision_id,
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parent_invs, shagitmap, lookup_object,
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allow_submodules=allow_submodules)
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invdelta.extend(subinvdelta)
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child_modes.update(grandchildmodes)
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shamap.extend(subshamap)
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elif S_ISGITLINK(mode): # submodule
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if not allow_submodules:
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raise SubmodulesRequireSubtrees()
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subinvdelta, grandchildmodes, subshamap = import_git_submodule(
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texts, mapping, child_path, child_hexsha, base_inv, base_children.get(basename),
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file_id, revision_id, parent_invs, shagitmap, lookup_object)
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invdelta.extend(subinvdelta)
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child_modes.update(grandchildmodes)
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shamap.extend(subshamap)
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subinvdelta, subshamap = import_git_blob(texts, mapping,
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child_path, child_hexsha, base_inv, base_children.get(basename), file_id,
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revision_id, parent_invs, shagitmap, lookup_object,
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mode_is_executable(mode), stat.S_ISLNK(mode))
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invdelta.extend(subinvdelta)
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shamap.extend(subshamap)
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if 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] = mode
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# Remove any children that have disappeared
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if base_ie is not None and base_ie.kind == "directory":
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invdelta.extend(remove_disappeared_children(base_inv.id2path(file_id),
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base_children, existing_children))
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shamap.append((hexsha, "tree", (file_id, revision_id)))
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return invdelta, child_modes, shamap
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def approx_inv_size(inv):
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# Very rough estimate, 1k per inventory entry
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return len(inv) * 1024
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def import_git_commit(repo, mapping, head, lookup_object,
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target_git_object_retriever, parent_invs_cache):
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o = lookup_object(head)
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rev = mapping.import_commit(o)
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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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for parent_id in rev.parent_ids:
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parent_invs.append(parent_invs_cache[parent_id])
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parent_inv = repo.get_inventory(parent_id)
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parent_invs.append(parent_inv)
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parent_invs_cache[parent_id] = parent_inv
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if parent_invs == []:
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base_inv = Inventory(root_id=None)
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base_inv = parent_invs[0]
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base_ie = base_inv.root
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inv_delta, unusual_modes, shamap = import_git_tree(repo.texts,
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mapping, "", o.tree, base_inv, base_ie, None, rev.revision_id,
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parent_invs, target_git_object_retriever._idmap, lookup_object,
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allow_submodules=getattr(repo._format, "supports_tree_reference", False))
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target_git_object_retriever._idmap.add_entries(shamap)
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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,
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parent_invs_cache[rev.revision_id] = inv
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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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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" % (unusual_modes, new_unusual_modes))
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objs = inventory_to_tree_and_blobs(inv, repo.texts, mapping, unusual_modes)
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for newsha1, newobj, path in objs:
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assert path is not None
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(oldmode, oldsha1) = tree_lookup_path(lookup_object, o.tree, path)
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if oldsha1 != newsha1:
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raise AssertionError("%r != %r in %s" % (oldsha1, newsha1, path))
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def import_git_objects(repo, mapping, object_iter, target_git_object_retriever,
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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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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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# TODO: a more (memory-)efficient implementation of this
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heads = list(set(heads))
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parent_invs_cache = lru_cache.LRUSizeCache(compute_size=approx_inv_size,
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max_size=MAX_INV_CACHE_SIZE)
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target_git_object_retriever.start_write_group() # FIXME: try/finally
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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 = object_iter[head]
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if isinstance(o, Commit):
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rev = mapping.import_commit(o)
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if repo.has_revision(rev.revision_id):
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squash_revision(repo, rev)
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graph.append((o.id, o.parents))
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target_git_object_retriever._idmap.add_entry(o.id, "commit",
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(rev.revision_id, o.tree))
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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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repo.start_write_group()
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for i, head in enumerate(revision_ids[offset:offset+batch_size]):
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pb.update("fetching revisions", offset+i, len(revision_ids))
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import_git_commit(repo, mapping, head, lookup_object,
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target_git_object_retriever,
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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.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 _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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def fetch(self, revision_id=None, pb=None, find_ghosts=False, mapping=None,
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self.fetch_refs(revision_id=revision_id, pb=pb, find_ghosts=find_ghosts,
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mapping=mapping, fetch_spec=fetch_spec)
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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 fetch_refs(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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interesting_heads = fetch_spec.heads
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interesting_heads = None
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def determine_wants(refs):
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if interesting_heads is None:
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ret = [sha for (ref, sha) in refs.iteritems() if not ref.endswith("^{}")]
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ret = [mapping.revision_id_bzr_to_foreign(revid)[0] for revid in interesting_heads if revid not in (None, NULL_REVISION)]
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return [rev for rev in ret if not self.target.has_revision(mapping.revision_id_foreign_to_bzr(rev))]
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pack_hint = self.fetch_objects(determine_wants, mapping, pb)[0]
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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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if interesting_heads is not None:
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present_interesting_heads = self.target.has_revisions(interesting_heads)
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missing_interesting_heads = set(interesting_heads) - present_interesting_heads
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if missing_interesting_heads:
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raise AssertionError("Missing interesting heads: %r" % missing_interesting_heads)
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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)
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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()
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parent_map = self.target.get_parent_map(all_revs)
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map(all_parents.update, parent_map.itervalues())
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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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report_git_progress(pb, text)
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store = BazaarObjectStore(self.target, mapping)
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self.target.lock_write()
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heads = self.get_target_heads()
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graph_walker = store.get_graph_walker(
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[store._lookup_revision_sha1(head) for head in heads])
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def record_determine_wants(heads):
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wants = determine_wants(heads)
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recorded_wants.extend(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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record_determine_wants, graph_walker,
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store.get_raw, progress)
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return import_git_objects(self.target, mapping,
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objects_iter, store, recorded_wants, pb, limit)
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def is_compatible(source, target):
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"""Be compatible with GitRepository."""
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# FIXME: Also check target uses VersionedFile
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return (isinstance(source, RemoteGitRepository) and
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target.supports_rich_root() and
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not isinstance(target, GitRepository))
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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):
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wants = determine_wants(self.source._git.get_refs())
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create_pb = pb = ui.ui_factory.nested_progress_bar()
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target_git_object_retriever = BazaarObjectStore(self.target, mapping)
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self.target.lock_write()
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return import_git_objects(self.target, mapping,
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self.source._git.object_store, target_git_object_retriever,
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def is_compatible(source, target):
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"""Be compatible with GitRepository."""
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# FIXME: Also check target uses VersionedFile
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return (isinstance(source, LocalGitRepository) and
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target.supports_rich_root() and
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not isinstance(target, GitRepository))
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class InterGitGitRepository(InterGitRepository):
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"""InterRepository that copies between Git repositories."""
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def fetch_objects(self, determine_wants, mapping, pb=None):
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trace.note("git: %s", text)
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graphwalker = self.target._git.get_graph_walker()
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if (isinstance(self.source, LocalGitRepository) and
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isinstance(self.target, LocalGitRepository)):
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return self.source._git.fetch(self.target._git, determine_wants,
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elif (isinstance(self.source, LocalGitRepository) and
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isinstance(self.target, RemoteGitRepository)):
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raise NotImplementedError
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elif (isinstance(self.source, RemoteGitRepository) and
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isinstance(self.target, LocalGitRepository)):
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f, commit = self.target._git.object_store.add_thin_pack()
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refs = self.source._git.fetch_pack(determine_wants,
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graphwalker, f.write, progress)
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def fetch_refs(self, revision_id=None, pb=None, find_ghosts=False,
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mapping=None, fetch_spec=None, branches=None):
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mapping = self.source.get_mapping()
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if revision_id is not None:
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args = [mapping.revision_id_bzr_to_foreign(revision_id)[0]]
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elif fetch_spec is not None:
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args = [mapping.revision_id_bzr_to_foreign(revid)[0] for revid in fetch_spec.heads]
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if branches is not None:
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determine_wants = lambda x: [x[y] for y in branches if not x[y] in r.object_store]
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elif fetch_spec is None and revision_id is None:
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determine_wants = r.object_store.determine_wants_all
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determine_wants = lambda x: [y for y in args if not y in r.object_store]
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return self.fetch_objects(determine_wants, mapping)[0]
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def is_compatible(source, target):
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"""Be compatible with GitRepository."""
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return (isinstance(source, GitRepository) and
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isinstance(target, GitRepository))
added
removed
fetch.py
