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# Copyright (C) 2008, 2009 Canonical Ltd
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Repository formats using CHK inventories and groupcompress compression."""
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revision as _mod_revision,
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from bzrlib.btree_index import (
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from bzrlib.groupcompress import (
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GroupCompressVersionedFiles,
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from bzrlib.repofmt.pack_repo import (
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PackRootCommitBuilder,
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RepositoryPackCollection,
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class GCPack(NewPack):
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def __init__(self, pack_collection, upload_suffix='', file_mode=None):
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"""Create a NewPack instance.
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:param pack_collection: A PackCollection into which this is being
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:param upload_suffix: An optional suffix to be given to any temporary
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files created during the pack creation. e.g '.autopack'
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:param file_mode: An optional file mode to create the new files with.
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# replaced from NewPack to:
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# - change inventory reference list length to 1
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# - change texts reference lists to 1
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# TODO: patch this to be parameterised
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# The relative locations of the packs are constrained, but all are
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# passed in because the caller has them, so as to avoid object churn.
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index_builder_class = pack_collection._index_builder_class
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if pack_collection.chk_index is not None:
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chk_index = index_builder_class(reference_lists=0)
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# Revisions: parents list, no text compression.
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index_builder_class(reference_lists=1),
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# Inventory: We want to map compression only, but currently the
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# knit code hasn't been updated enough to understand that, so we
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# have a regular 2-list index giving parents and compression
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index_builder_class(reference_lists=1),
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# Texts: per file graph, for all fileids - so one reference list
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# and two elements in the key tuple.
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index_builder_class(reference_lists=1, key_elements=2),
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# Signatures: Just blobs to store, no compression, no parents
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index_builder_class(reference_lists=0),
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# CHK based storage - just blobs, no compression or parents.
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self._pack_collection = pack_collection
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# When we make readonly indices, we need this.
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self.index_class = pack_collection._index_class
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# where should the new pack be opened
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self.upload_transport = pack_collection._upload_transport
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# where are indices written out to
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self.index_transport = pack_collection._index_transport
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# where is the pack renamed to when it is finished?
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self.pack_transport = pack_collection._pack_transport
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# What file mode to upload the pack and indices with.
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self._file_mode = file_mode
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# tracks the content written to the .pack file.
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self._hash = osutils.md5()
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# a four-tuple with the length in bytes of the indices, once the pack
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# is finalised. (rev, inv, text, sigs)
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self.index_sizes = None
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# How much data to cache when writing packs. Note that this is not
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# synchronised with reads, because it's not in the transport layer, so
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# is not safe unless the client knows it won't be reading from the pack
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self._cache_limit = 0
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# the temporary pack file name.
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self.random_name = osutils.rand_chars(20) + upload_suffix
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# when was this pack started ?
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self.start_time = time.time()
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# open an output stream for the data added to the pack.
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self.write_stream = self.upload_transport.open_write_stream(
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self.random_name, mode=self._file_mode)
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if 'pack' in debug.debug_flags:
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trace.mutter('%s: create_pack: pack stream open: %s%s t+%6.3fs',
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time.ctime(), self.upload_transport.base, self.random_name,
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time.time() - self.start_time)
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# A list of byte sequences to be written to the new pack, and the
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# aggregate size of them. Stored as a list rather than separate
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# variables so that the _write_data closure below can update them.
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self._buffer = [[], 0]
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# create a callable for adding data
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# robertc says- this is a closure rather than a method on the object
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# so that the variables are locals, and faster than accessing object
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def _write_data(bytes, flush=False, _buffer=self._buffer,
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_write=self.write_stream.write, _update=self._hash.update):
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_buffer[0].append(bytes)
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_buffer[1] += len(bytes)
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if _buffer[1] > self._cache_limit or flush:
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bytes = ''.join(_buffer[0])
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# expose this on self, for the occasion when clients want to add data.
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self._write_data = _write_data
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# a pack writer object to serialise pack records.
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self._writer = pack.ContainerWriter(self._write_data)
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# what state is the pack in? (open, finished, aborted)
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# no name until we finish writing the content
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def _check_references(self):
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"""Make sure our external references are present.
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Packs are allowed to have deltas whose base is not in the pack, but it
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must be present somewhere in this collection. It is not allowed to
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have deltas based on a fallback repository.
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(See <https://bugs.launchpad.net/bzr/+bug/288751>)
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# Groupcompress packs don't have any external references, arguably CHK
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# pages have external references, but we cannot 'cheaply' determine
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# them without actually walking all of the chk pages.
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class ResumedGCPack(ResumedPack):
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def _check_references(self):
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"""Make sure our external compression parents are present."""
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# See GCPack._check_references for why this is empty
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def _get_external_refs(self, index):
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# GC repositories don't have compression parents external to a given
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class GCCHKPacker(Packer):
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"""This class understand what it takes to collect a GCCHK repo."""
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def __init__(self, pack_collection, packs, suffix, revision_ids=None,
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super(GCCHKPacker, self).__init__(pack_collection, packs, suffix,
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revision_ids=revision_ids,
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reload_func=reload_func)
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self._pack_collection = pack_collection
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# ATM, We only support this for GCCHK repositories
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if pack_collection.chk_index is None:
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raise AssertionError('pack_collection.chk_index should not be None')
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self._gather_text_refs = False
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self._chk_id_roots = []
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self._chk_p_id_roots = []
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self._text_refs = None
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# set by .pack() if self.revision_ids is not None
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self.revision_keys = None
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def _get_progress_stream(self, source_vf, keys, message, pb):
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substream = source_vf.get_record_stream(keys, 'groupcompress', True)
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for idx, record in enumerate(substream):
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pb.update(message, idx + 1, len(keys))
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def _get_filtered_inv_stream(self, source_vf, keys, message, pb=None):
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"""Filter the texts of inventories, to find the chk pages."""
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total_keys = len(keys)
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def _filtered_inv_stream():
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p_id_roots_set = set()
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stream = source_vf.get_record_stream(keys, 'groupcompress', True)
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for idx, record in enumerate(stream):
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# Inventories should always be with revisions; assume success.
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bytes = record.get_bytes_as('fulltext')
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chk_inv = inventory.CHKInventory.deserialise(None, bytes,
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pb.update('inv', idx, total_keys)
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key = chk_inv.id_to_entry.key()
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if key not in id_roots_set:
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self._chk_id_roots.append(key)
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id_roots_set.add(key)
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p_id_map = chk_inv.parent_id_basename_to_file_id
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raise AssertionError('Parent id -> file_id map not set')
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if key not in p_id_roots_set:
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p_id_roots_set.add(key)
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self._chk_p_id_roots.append(key)
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# We have finished processing all of the inventory records, we
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# don't need these sets anymore
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p_id_roots_set.clear()
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return _filtered_inv_stream()
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def _get_chk_streams(self, source_vf, keys, pb=None):
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# We want to stream the keys from 'id_roots', and things they
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# reference, and then stream things from p_id_roots and things they
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# reference, and then any remaining keys that we didn't get to.
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# We also group referenced texts together, so if one root references a
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# text with prefix 'a', and another root references a node with prefix
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# 'a', we want to yield those nodes before we yield the nodes for 'b'
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# This keeps 'similar' nodes together.
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# Note: We probably actually want multiple streams here, to help the
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# client understand that the different levels won't compress well
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# against each other.
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# Test the difference between using one Group per level, and
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# using 1 Group per prefix. (so '' (root) would get a group, then
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# all the references to search-key 'a' would get a group, etc.)
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total_keys = len(keys)
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remaining_keys = set(keys)
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if self._gather_text_refs:
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bytes_to_info = inventory.CHKInventory._bytes_to_utf8name_key
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self._text_refs = set()
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def _get_referenced_stream(root_keys, parse_leaf_nodes=False):
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keys_by_search_prefix = {}
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remaining_keys.difference_update(cur_keys)
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def handle_internal_node(node):
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for prefix, value in node._items.iteritems():
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# We don't want to request the same key twice, and we
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# want to order it by the first time it is seen.
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# Even further, we don't want to request a key which is
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# not in this group of pack files (it should be in the
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# repo, but it doesn't have to be in the group being
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# TODO: consider how to treat externally referenced chk
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# pages as 'external_references' so that we
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# always fill them in for stacked branches
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if value not in next_keys and value in remaining_keys:
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keys_by_search_prefix.setdefault(prefix,
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def handle_leaf_node(node):
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# Store is None, because we know we have a LeafNode, and we
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# just want its entries
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for file_id, bytes in node.iteritems(None):
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name_utf8, file_id, revision_id = bytes_to_info(bytes)
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self._text_refs.add((file_id, revision_id))
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stream = source_vf.get_record_stream(cur_keys,
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'as-requested', True)
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for record in stream:
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if record.storage_kind == 'absent':
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# An absent CHK record: we assume that the missing
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# record is in a different pack - e.g. a page not
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# altered by the commit we're packing.
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bytes = record.get_bytes_as('fulltext')
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# We don't care about search_key_func for this code,
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# because we only care about external references.
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node = chk_map._deserialise(bytes, record.key,
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search_key_func=None)
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common_base = node._search_prefix
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if isinstance(node, chk_map.InternalNode):
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handle_internal_node(node)
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elif parse_leaf_nodes:
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handle_leaf_node(node)
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pb.update('chk node', counter[0], total_keys)
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# Double check that we won't be emitting any keys twice
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# If we get rid of the pre-calculation of all keys, we could
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# turn this around and do
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# next_keys.difference_update(seen_keys)
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# However, we also may have references to chk pages in another
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# pack file during autopack. We filter earlier, so we should no
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# longer need to do this
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# next_keys = next_keys.intersection(remaining_keys)
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for prefix in sorted(keys_by_search_prefix):
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cur_keys.extend(keys_by_search_prefix.pop(prefix))
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for stream in _get_referenced_stream(self._chk_id_roots,
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self._gather_text_refs):
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del self._chk_id_roots
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# while it isn't really possible for chk_id_roots to not be in the
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# local group of packs, it is possible that the tree shape has not
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# changed recently, so we need to filter _chk_p_id_roots by the
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chk_p_id_roots = [key for key in self._chk_p_id_roots
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if key in remaining_keys]
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del self._chk_p_id_roots
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for stream in _get_referenced_stream(chk_p_id_roots, False):
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trace.mutter('There were %d keys in the chk index, %d of which'
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' were not referenced', total_keys,
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if self.revision_ids is None:
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stream = source_vf.get_record_stream(remaining_keys,
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def _build_vf(self, index_name, parents, delta, for_write=False):
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"""Build a VersionedFiles instance on top of this group of packs."""
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index_name = index_name + '_index'
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access = knit._DirectPackAccess(index_to_pack)
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if self.new_pack is None:
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raise AssertionError('No new pack has been set')
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index = getattr(self.new_pack, index_name)
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index_to_pack[index] = self.new_pack.access_tuple()
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index.set_optimize(for_size=True)
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access.set_writer(self.new_pack._writer, index,
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self.new_pack.access_tuple())
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add_callback = index.add_nodes
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for pack in self.packs:
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sub_index = getattr(pack, index_name)
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index_to_pack[sub_index] = pack.access_tuple()
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indices.append(sub_index)
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index = _mod_index.CombinedGraphIndex(indices)
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vf = GroupCompressVersionedFiles(
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add_callback=add_callback,
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is_locked=self._pack_collection.repo.is_locked),
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def _build_vfs(self, index_name, parents, delta):
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"""Build the source and target VersionedFiles."""
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source_vf = self._build_vf(index_name, parents,
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delta, for_write=False)
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target_vf = self._build_vf(index_name, parents,
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delta, for_write=True)
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return source_vf, target_vf
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def _copy_stream(self, source_vf, target_vf, keys, message, vf_to_stream,
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trace.mutter('repacking %d %s', len(keys), message)
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self.pb.update('repacking %s' % (message,), pb_offset)
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child_pb = ui.ui_factory.nested_progress_bar()
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stream = vf_to_stream(source_vf, keys, message, child_pb)
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for _ in target_vf._insert_record_stream(stream,
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def _copy_revision_texts(self):
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source_vf, target_vf = self._build_vfs('revision', True, False)
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if not self.revision_keys:
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# We are doing a full fetch, aka 'pack'
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self.revision_keys = source_vf.keys()
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self._copy_stream(source_vf, target_vf, self.revision_keys,
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'revisions', self._get_progress_stream, 1)
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def _copy_inventory_texts(self):
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source_vf, target_vf = self._build_vfs('inventory', True, True)
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# It is not sufficient to just use self.revision_keys, as stacked
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# repositories can have more inventories than they have revisions.
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# One alternative would be to do something with
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# get_parent_map(self.revision_keys), but that shouldn't be any faster
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inventory_keys = source_vf.keys()
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missing_inventories = set(self.revision_keys).difference(inventory_keys)
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if missing_inventories:
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missing_inventories = sorted(missing_inventories)
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raise ValueError('We are missing inventories for revisions: %s'
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% (missing_inventories,))
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self._copy_stream(source_vf, target_vf, inventory_keys,
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'inventories', self._get_filtered_inv_stream, 2)
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def _copy_chk_texts(self):
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source_vf, target_vf = self._build_vfs('chk', False, False)
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# TODO: This is technically spurious... if it is a performance issue,
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total_keys = source_vf.keys()
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trace.mutter('repacking chk: %d id_to_entry roots,'
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' %d p_id_map roots, %d total keys',
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len(self._chk_id_roots), len(self._chk_p_id_roots),
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self.pb.update('repacking chk', 3)
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child_pb = ui.ui_factory.nested_progress_bar()
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for stream in self._get_chk_streams(source_vf, total_keys,
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for _ in target_vf._insert_record_stream(stream,
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def _copy_text_texts(self):
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source_vf, target_vf = self._build_vfs('text', True, True)
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# XXX: We don't walk the chk map to determine referenced (file_id,
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# revision_id) keys. We don't do it yet because you really need
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# to filter out the ones that are present in the parents of the
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# rev just before the ones you are copying, otherwise the filter
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# is grabbing too many keys...
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text_keys = source_vf.keys()
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self._copy_stream(source_vf, target_vf, text_keys,
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'texts', self._get_progress_stream, 4)
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def _copy_signature_texts(self):
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source_vf, target_vf = self._build_vfs('signature', False, False)
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signature_keys = source_vf.keys()
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signature_keys.intersection(self.revision_keys)
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self._copy_stream(source_vf, target_vf, signature_keys,
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'signatures', self._get_progress_stream, 5)
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def _create_pack_from_packs(self):
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self.pb.update('repacking', 0, 7)
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self.new_pack = self.open_pack()
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# Is this necessary for GC ?
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self.new_pack.set_write_cache_size(1024*1024)
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self._copy_revision_texts()
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self._copy_inventory_texts()
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self._copy_chk_texts()
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self._copy_text_texts()
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self._copy_signature_texts()
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self.new_pack._check_references()
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if not self._use_pack(self.new_pack):
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self.new_pack.abort()
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self.new_pack.finish_content()
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if len(self.packs) == 1:
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old_pack = self.packs[0]
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if old_pack.name == self.new_pack._hash.hexdigest():
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# The single old pack was already optimally packed.
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trace.mutter('single pack %s was already optimally packed',
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self.new_pack.abort()
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self.pb.update('finishing repack', 6, 7)
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self.new_pack.finish()
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self._pack_collection.allocate(self.new_pack)
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class GCCHKReconcilePacker(GCCHKPacker):
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"""A packer which regenerates indices etc as it copies.
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This is used by ``bzr reconcile`` to cause parent text pointers to be
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def __init__(self, *args, **kwargs):
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super(GCCHKReconcilePacker, self).__init__(*args, **kwargs)
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self._data_changed = False
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self._gather_text_refs = True
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def _copy_inventory_texts(self):
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source_vf, target_vf = self._build_vfs('inventory', True, True)
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self._copy_stream(source_vf, target_vf, self.revision_keys,
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'inventories', self._get_filtered_inv_stream, 2)
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if source_vf.keys() != self.revision_keys:
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self._data_changed = True
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def _copy_text_texts(self):
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"""generate what texts we should have and then copy."""
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source_vf, target_vf = self._build_vfs('text', True, True)
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trace.mutter('repacking %d texts', len(self._text_refs))
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self.pb.update("repacking texts", 4)
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# we have three major tasks here:
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# 1) generate the ideal index
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repo = self._pack_collection.repo
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# We want the one we just wrote, so base it on self.new_pack
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revision_vf = self._build_vf('revision', True, False, for_write=True)
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ancestor_keys = revision_vf.get_parent_map(revision_vf.keys())
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# Strip keys back into revision_ids.
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ancestors = dict((k[0], tuple([p[0] for p in parents]))
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for k, parents in ancestor_keys.iteritems())
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# TODO: _generate_text_key_index should be much cheaper to generate from
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# a chk repository, rather than the current implementation
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ideal_index = repo._generate_text_key_index(None, ancestors)
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file_id_parent_map = source_vf.get_parent_map(self._text_refs)
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# 2) generate a keys list that contains all the entries that can
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# be used as-is, with corrected parents.
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new_parent_keys = {} # (key, parent_keys)
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NULL_REVISION = _mod_revision.NULL_REVISION
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for key in self._text_refs:
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ideal_parents = tuple(ideal_index[key])
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discarded_keys.append(key)
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self._data_changed = True
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if ideal_parents == (NULL_REVISION,):
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source_parents = file_id_parent_map[key]
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if ideal_parents == source_parents:
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# We need to change the parent graph, but we don't need to
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# re-insert the text (since we don't pun the compression
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# parent with the parents list)
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self._data_changed = True
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new_parent_keys[key] = ideal_parents
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# we're finished with some data.
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del file_id_parent_map
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# 3) bulk copy the data, updating records than need it
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def _update_parents_for_texts():
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stream = source_vf.get_record_stream(self._text_refs,
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'groupcompress', False)
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for record in stream:
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if record.key in new_parent_keys:
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record.parents = new_parent_keys[record.key]
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target_vf.insert_record_stream(_update_parents_for_texts())
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def _use_pack(self, new_pack):
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"""Override _use_pack to check for reconcile having changed content."""
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return new_pack.data_inserted() and self._data_changed
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class GCRepositoryPackCollection(RepositoryPackCollection):
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pack_factory = GCPack
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resumed_pack_factory = ResumedGCPack
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def _execute_pack_operations(self, pack_operations,
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_packer_class=GCCHKPacker,
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"""Execute a series of pack operations.
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:param pack_operations: A list of [revision_count, packs_to_combine].
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:param _packer_class: The class of packer to use (default: Packer).
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# XXX: Copied across from RepositoryPackCollection simply because we
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# want to override the _packer_class ... :(
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for revision_count, packs in pack_operations:
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# we may have no-ops from the setup logic
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packer = GCCHKPacker(self, packs, '.autopack',
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reload_func=reload_func)
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result = packer.pack()
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except errors.RetryWithNewPacks:
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# An exception is propagating out of this context, make sure
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# this packer has cleaned up. Packer() doesn't set its new_pack
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# state into the RepositoryPackCollection object, so we only
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# have access to it directly here.
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if packer.new_pack is not None:
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packer.new_pack.abort()
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self._remove_pack_from_memory(pack)
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# record the newly available packs and stop advertising the old
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self._save_pack_names(clear_obsolete_packs=True)
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# Move the old packs out of the way now they are no longer referenced.
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for revision_count, packs in pack_operations:
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self._obsolete_packs(packs)
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class CHKInventoryRepository(KnitPackRepository):
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"""subclass of KnitPackRepository that uses CHK based inventories."""
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def __init__(self, _format, a_bzrdir, control_files, _commit_builder_class,
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"""Overridden to change pack collection class."""
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KnitPackRepository.__init__(self, _format, a_bzrdir, control_files,
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_commit_builder_class, _serializer)
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# and now replace everything it did :)
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index_transport = self._transport.clone('indices')
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self._pack_collection = GCRepositoryPackCollection(self,
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self._transport, index_transport,
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self._transport.clone('upload'),
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self._transport.clone('packs'),
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_format.index_builder_class,
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use_chk_index=self._format.supports_chks,
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self.inventories = GroupCompressVersionedFiles(
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_GCGraphIndex(self._pack_collection.inventory_index.combined_index,
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add_callback=self._pack_collection.inventory_index.add_callback,
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parents=True, is_locked=self.is_locked,
648
inconsistency_fatal=False),
649
access=self._pack_collection.inventory_index.data_access)
650
self.revisions = GroupCompressVersionedFiles(
651
_GCGraphIndex(self._pack_collection.revision_index.combined_index,
652
add_callback=self._pack_collection.revision_index.add_callback,
653
parents=True, is_locked=self.is_locked,
654
track_external_parent_refs=True),
655
access=self._pack_collection.revision_index.data_access,
657
self.signatures = GroupCompressVersionedFiles(
658
_GCGraphIndex(self._pack_collection.signature_index.combined_index,
659
add_callback=self._pack_collection.signature_index.add_callback,
660
parents=False, is_locked=self.is_locked,
661
inconsistency_fatal=False),
662
access=self._pack_collection.signature_index.data_access,
664
self.texts = GroupCompressVersionedFiles(
665
_GCGraphIndex(self._pack_collection.text_index.combined_index,
666
add_callback=self._pack_collection.text_index.add_callback,
667
parents=True, is_locked=self.is_locked,
668
inconsistency_fatal=False),
669
access=self._pack_collection.text_index.data_access)
670
# No parents, individual CHK pages don't have specific ancestry
671
self.chk_bytes = GroupCompressVersionedFiles(
672
_GCGraphIndex(self._pack_collection.chk_index.combined_index,
673
add_callback=self._pack_collection.chk_index.add_callback,
674
parents=False, is_locked=self.is_locked,
675
inconsistency_fatal=False),
676
access=self._pack_collection.chk_index.data_access)
677
search_key_name = self._format._serializer.search_key_name
678
search_key_func = chk_map.search_key_registry.get(search_key_name)
679
self.chk_bytes._search_key_func = search_key_func
680
# True when the repository object is 'write locked' (as opposed to the
681
# physical lock only taken out around changes to the pack-names list.)
682
# Another way to represent this would be a decorator around the control
683
# files object that presents logical locks as physical ones - if this
684
# gets ugly consider that alternative design. RBC 20071011
685
self._write_lock_count = 0
686
self._transaction = None
688
self._reconcile_does_inventory_gc = True
689
self._reconcile_fixes_text_parents = True
690
self._reconcile_backsup_inventory = False
692
def _add_inventory_checked(self, revision_id, inv, parents):
693
"""Add inv to the repository after checking the inputs.
695
This function can be overridden to allow different inventory styles.
697
:seealso: add_inventory, for the contract.
700
serializer = self._format._serializer
701
result = inventory.CHKInventory.from_inventory(self.chk_bytes, inv,
702
maximum_size=serializer.maximum_size,
703
search_key_name=serializer.search_key_name)
704
inv_lines = result.to_lines()
705
return self._inventory_add_lines(revision_id, parents,
706
inv_lines, check_content=False)
708
def _create_inv_from_null(self, delta, revision_id):
709
"""This will mutate new_inv directly.
711
This is a simplified form of create_by_apply_delta which knows that all
712
the old values must be None, so everything is a create.
714
serializer = self._format._serializer
715
new_inv = inventory.CHKInventory(serializer.search_key_name)
716
new_inv.revision_id = revision_id
717
entry_to_bytes = new_inv._entry_to_bytes
718
id_to_entry_dict = {}
719
parent_id_basename_dict = {}
720
for old_path, new_path, file_id, entry in delta:
721
if old_path is not None:
722
raise ValueError('Invalid delta, somebody tried to delete %r'
723
' from the NULL_REVISION'
724
% ((old_path, file_id),))
726
raise ValueError('Invalid delta, delta from NULL_REVISION has'
727
' no new_path %r' % (file_id,))
729
new_inv.root_id = file_id
730
parent_id_basename_key = ('', '')
732
utf8_entry_name = entry.name.encode('utf-8')
733
parent_id_basename_key = (entry.parent_id, utf8_entry_name)
734
new_value = entry_to_bytes(entry)
736
# new_inv._path_to_fileid_cache[new_path] = file_id
737
id_to_entry_dict[(file_id,)] = new_value
738
parent_id_basename_dict[parent_id_basename_key] = file_id
740
new_inv._populate_from_dicts(self.chk_bytes, id_to_entry_dict,
741
parent_id_basename_dict, maximum_size=serializer.maximum_size)
744
def add_inventory_by_delta(self, basis_revision_id, delta, new_revision_id,
745
parents, basis_inv=None, propagate_caches=False):
746
"""Add a new inventory expressed as a delta against another revision.
748
:param basis_revision_id: The inventory id the delta was created
750
:param delta: The inventory delta (see Inventory.apply_delta for
752
:param new_revision_id: The revision id that the inventory is being
754
:param parents: The revision ids of the parents that revision_id is
755
known to have and are in the repository already. These are supplied
756
for repositories that depend on the inventory graph for revision
757
graph access, as well as for those that pun ancestry with delta
759
:param basis_inv: The basis inventory if it is already known,
761
:param propagate_caches: If True, the caches for this inventory are
762
copied to and updated for the result if possible.
764
:returns: (validator, new_inv)
765
The validator(which is a sha1 digest, though what is sha'd is
766
repository format specific) of the serialized inventory, and the
769
if not self.is_in_write_group():
770
raise AssertionError("%r not in write group" % (self,))
771
_mod_revision.check_not_reserved_id(new_revision_id)
773
if basis_inv is None:
774
if basis_revision_id == _mod_revision.NULL_REVISION:
775
new_inv = self._create_inv_from_null(delta, new_revision_id)
776
inv_lines = new_inv.to_lines()
777
return self._inventory_add_lines(new_revision_id, parents,
778
inv_lines, check_content=False), new_inv
780
basis_tree = self.revision_tree(basis_revision_id)
781
basis_tree.lock_read()
782
basis_inv = basis_tree.inventory
784
result = basis_inv.create_by_apply_delta(delta, new_revision_id,
785
propagate_caches=propagate_caches)
786
inv_lines = result.to_lines()
787
return self._inventory_add_lines(new_revision_id, parents,
788
inv_lines, check_content=False), result
790
if basis_tree is not None:
793
def deserialise_inventory(self, revision_id, bytes):
794
return inventory.CHKInventory.deserialise(self.chk_bytes, bytes,
797
def _iter_inventories(self, revision_ids, ordering):
798
"""Iterate over many inventory objects."""
800
ordering = 'unordered'
801
keys = [(revision_id,) for revision_id in revision_ids]
802
stream = self.inventories.get_record_stream(keys, ordering, True)
804
for record in stream:
805
if record.storage_kind != 'absent':
806
texts[record.key] = record.get_bytes_as('fulltext')
808
raise errors.NoSuchRevision(self, record.key)
810
yield inventory.CHKInventory.deserialise(self.chk_bytes, texts[key], key)
812
def _iter_inventory_xmls(self, revision_ids, ordering):
813
# Without a native 'xml' inventory, this method doesn't make sense, so
814
# make it raise to trap naughty direct users.
815
raise NotImplementedError(self._iter_inventory_xmls)
817
def _find_present_inventory_keys(self, revision_keys):
818
parent_map = self.inventories.get_parent_map(revision_keys)
819
present_inventory_keys = set(k for k in parent_map)
820
return present_inventory_keys
822
def fileids_altered_by_revision_ids(self, revision_ids, _inv_weave=None):
823
"""Find the file ids and versions affected by revisions.
825
:param revisions: an iterable containing revision ids.
826
:param _inv_weave: The inventory weave from this repository or None.
827
If None, the inventory weave will be opened automatically.
828
:return: a dictionary mapping altered file-ids to an iterable of
829
revision_ids. Each altered file-ids has the exact revision_ids that
830
altered it listed explicitly.
832
rich_root = self.supports_rich_root()
833
bytes_to_info = inventory.CHKInventory._bytes_to_utf8name_key
834
file_id_revisions = {}
835
pb = ui.ui_factory.nested_progress_bar()
837
revision_keys = [(r,) for r in revision_ids]
838
parent_keys = self._find_parent_keys_of_revisions(revision_keys)
839
# TODO: instead of using _find_present_inventory_keys, change the
840
# code paths to allow missing inventories to be tolerated.
841
# However, we only want to tolerate missing parent
842
# inventories, not missing inventories for revision_ids
843
present_parent_inv_keys = self._find_present_inventory_keys(
845
present_parent_inv_ids = set(
846
[k[-1] for k in present_parent_inv_keys])
847
uninteresting_root_keys = set()
848
interesting_root_keys = set()
849
inventories_to_read = set(revision_ids)
850
inventories_to_read.update(present_parent_inv_ids)
851
for inv in self.iter_inventories(inventories_to_read):
852
entry_chk_root_key = inv.id_to_entry.key()
853
if inv.revision_id in present_parent_inv_ids:
854
uninteresting_root_keys.add(entry_chk_root_key)
856
interesting_root_keys.add(entry_chk_root_key)
858
chk_bytes = self.chk_bytes
859
for record, items in chk_map.iter_interesting_nodes(chk_bytes,
860
interesting_root_keys, uninteresting_root_keys,
862
for name, bytes in items:
863
(name_utf8, file_id, revision_id) = bytes_to_info(bytes)
864
if not rich_root and name_utf8 == '':
867
file_id_revisions[file_id].add(revision_id)
869
file_id_revisions[file_id] = set([revision_id])
872
return file_id_revisions
874
def find_text_key_references(self):
875
"""Find the text key references within the repository.
877
:return: A dictionary mapping text keys ((fileid, revision_id) tuples)
878
to whether they were referred to by the inventory of the
879
revision_id that they contain. The inventory texts from all present
880
revision ids are assessed to generate this report.
882
# XXX: Slow version but correct: rewrite as a series of delta
883
# examinations/direct tree traversal. Note that that will require care
884
# as a common node is reachable both from the inventory that added it,
885
# and others afterwards.
886
revision_keys = self.revisions.keys()
888
rich_roots = self.supports_rich_root()
889
pb = ui.ui_factory.nested_progress_bar()
891
all_revs = self.all_revision_ids()
892
total = len(all_revs)
893
for pos, inv in enumerate(self.iter_inventories(all_revs)):
894
pb.update("Finding text references", pos, total)
895
for _, entry in inv.iter_entries():
896
if not rich_roots and entry.file_id == inv.root_id:
898
key = (entry.file_id, entry.revision)
899
result.setdefault(key, False)
900
if entry.revision == inv.revision_id:
906
def _reconcile_pack(self, collection, packs, extension, revs, pb):
907
packer = GCCHKReconcilePacker(collection, packs, extension)
908
return packer.pack(pb)
910
def _get_source(self, to_format):
911
"""Return a source for streaming from this repository."""
912
if self._format._serializer == to_format._serializer:
913
# We must be exactly the same format, otherwise stuff like the chk
914
# page layout might be different.
915
# Actually, this test is just slightly looser than exact so that
916
# CHK2 <-> 2a transfers will work.
917
return GroupCHKStreamSource(self, to_format)
918
return super(CHKInventoryRepository, self)._get_source(to_format)
921
class GroupCHKStreamSource(KnitPackStreamSource):
922
"""Used when both the source and target repo are GroupCHK repos."""
924
def __init__(self, from_repository, to_format):
925
"""Create a StreamSource streaming from from_repository."""
926
super(GroupCHKStreamSource, self).__init__(from_repository, to_format)
927
self._revision_keys = None
928
self._text_keys = None
929
self._text_fetch_order = 'groupcompress'
930
self._chk_id_roots = None
931
self._chk_p_id_roots = None
933
def _get_inventory_stream(self, inventory_keys, allow_absent=False):
934
"""Get a stream of inventory texts.
936
When this function returns, self._chk_id_roots and self._chk_p_id_roots
939
self._chk_id_roots = []
940
self._chk_p_id_roots = []
941
def _filtered_inv_stream():
943
p_id_roots_set = set()
944
source_vf = self.from_repository.inventories
945
stream = source_vf.get_record_stream(inventory_keys,
946
'groupcompress', True)
947
for record in stream:
948
if record.storage_kind == 'absent':
952
raise errors.NoSuchRevision(self, record.key)
953
bytes = record.get_bytes_as('fulltext')
954
chk_inv = inventory.CHKInventory.deserialise(None, bytes,
956
key = chk_inv.id_to_entry.key()
957
if key not in id_roots_set:
958
self._chk_id_roots.append(key)
959
id_roots_set.add(key)
960
p_id_map = chk_inv.parent_id_basename_to_file_id
962
raise AssertionError('Parent id -> file_id map not set')
964
if key not in p_id_roots_set:
965
p_id_roots_set.add(key)
966
self._chk_p_id_roots.append(key)
968
# We have finished processing all of the inventory records, we
969
# don't need these sets anymore
971
p_id_roots_set.clear()
972
return ('inventories', _filtered_inv_stream())
974
def _get_filtered_chk_streams(self, excluded_revision_keys):
975
self._text_keys = set()
976
excluded_revision_keys.discard(_mod_revision.NULL_REVISION)
977
if not excluded_revision_keys:
978
uninteresting_root_keys = set()
979
uninteresting_pid_root_keys = set()
981
# filter out any excluded revisions whose inventories are not
983
# TODO: Update Repository.iter_inventories() to add
984
# ignore_missing=True
985
present_keys = self.from_repository._find_present_inventory_keys(
986
excluded_revision_keys)
987
present_ids = [k[-1] for k in present_keys]
988
uninteresting_root_keys = set()
989
uninteresting_pid_root_keys = set()
990
for inv in self.from_repository.iter_inventories(present_ids):
991
uninteresting_root_keys.add(inv.id_to_entry.key())
992
uninteresting_pid_root_keys.add(
993
inv.parent_id_basename_to_file_id.key())
994
bytes_to_info = inventory.CHKInventory._bytes_to_utf8name_key
995
chk_bytes = self.from_repository.chk_bytes
996
def _filter_id_to_entry():
997
for record, items in chk_map.iter_interesting_nodes(chk_bytes,
998
self._chk_id_roots, uninteresting_root_keys):
999
for name, bytes in items:
1000
# Note: we don't care about name_utf8, because we are always
1002
_, file_id, revision_id = bytes_to_info(bytes)
1003
self._text_keys.add((file_id, revision_id))
1004
if record is not None:
1007
self._chk_id_roots = None
1008
yield 'chk_bytes', _filter_id_to_entry()
1009
def _get_parent_id_basename_to_file_id_pages():
1010
for record, items in chk_map.iter_interesting_nodes(chk_bytes,
1011
self._chk_p_id_roots, uninteresting_pid_root_keys):
1012
if record is not None:
1015
self._chk_p_id_roots = None
1016
yield 'chk_bytes', _get_parent_id_basename_to_file_id_pages()
1018
def get_stream(self, search):
1019
revision_ids = search.get_keys()
1020
for stream_info in self._fetch_revision_texts(revision_ids):
1022
self._revision_keys = [(rev_id,) for rev_id in revision_ids]
1023
yield self._get_inventory_stream(self._revision_keys)
1024
# TODO: The keys to exclude might be part of the search recipe
1025
# For now, exclude all parents that are at the edge of ancestry, for
1026
# which we have inventories
1027
from_repo = self.from_repository
1028
parent_keys = from_repo._find_parent_keys_of_revisions(
1029
self._revision_keys)
1030
for stream_info in self._get_filtered_chk_streams(parent_keys):
1032
yield self._get_text_stream()
1034
def get_stream_for_missing_keys(self, missing_keys):
1035
# missing keys can only occur when we are byte copying and not
1036
# translating (because translation means we don't send
1037
# unreconstructable deltas ever).
1038
missing_inventory_keys = set()
1039
for key in missing_keys:
1040
if key[0] != 'inventories':
1041
raise AssertionError('The only missing keys we should'
1042
' be filling in are inventory keys, not %s'
1044
missing_inventory_keys.add(key[1:])
1045
if self._chk_id_roots or self._chk_p_id_roots:
1046
raise AssertionError('Cannot call get_stream_for_missing_keys'
1047
' untill all of get_stream() has been consumed.')
1048
# Yield the inventory stream, so we can find the chk stream
1049
# Some of the missing_keys will be missing because they are ghosts.
1050
# As such, we can ignore them. The Sink is required to verify there are
1051
# no unavailable texts when the ghost inventories are not filled in.
1052
yield self._get_inventory_stream(missing_inventory_keys,
1054
# We use the empty set for excluded_revision_keys, to make it clear
1055
# that we want to transmit all referenced chk pages.
1056
for stream_info in self._get_filtered_chk_streams(set()):
1060
class RepositoryFormatCHK1(RepositoryFormatPack):
1061
"""A hashed CHK+group compress pack repository."""
1063
repository_class = CHKInventoryRepository
1064
supports_external_lookups = True
1065
supports_chks = True
1066
# For right now, setting this to True gives us InterModel1And2 rather
1067
# than InterDifferingSerializer
1068
_commit_builder_class = PackRootCommitBuilder
1069
rich_root_data = True
1070
_serializer = chk_serializer.chk_serializer_255_bigpage
1071
_commit_inv_deltas = True
1072
# What index classes to use
1073
index_builder_class = BTreeBuilder
1074
index_class = BTreeGraphIndex
1075
# Note: We cannot unpack a delta that references a text we haven't
1076
# seen yet. There are 2 options, work in fulltexts, or require
1077
# topological sorting. Using fulltexts is more optimal for local
1078
# operations, because the source can be smart about extracting
1079
# multiple in-a-row (and sharing strings). Topological is better
1080
# for remote, because we access less data.
1081
_fetch_order = 'unordered'
1082
_fetch_uses_deltas = False # essentially ignored by the groupcompress code.
1084
pack_compresses = True
1086
def _get_matching_bzrdir(self):
1087
return bzrdir.format_registry.make_bzrdir('development6-rich-root')
1089
def _ignore_setting_bzrdir(self, format):
1092
_matchingbzrdir = property(_get_matching_bzrdir, _ignore_setting_bzrdir)
1094
def get_format_string(self):
1095
"""See RepositoryFormat.get_format_string()."""
1096
return ('Bazaar development format - group compression and chk inventory'
1097
' (needs bzr.dev from 1.14)\n')
1099
def get_format_description(self):
1100
"""See RepositoryFormat.get_format_description()."""
1101
return ("Development repository format - rich roots, group compression"
1102
" and chk inventories")
1105
class RepositoryFormatCHK2(RepositoryFormatCHK1):
1106
"""A CHK repository that uses the bencode revision serializer."""
1108
_serializer = chk_serializer.chk_bencode_serializer
1110
def _get_matching_bzrdir(self):
1111
return bzrdir.format_registry.make_bzrdir('development7-rich-root')
1113
def _ignore_setting_bzrdir(self, format):
1116
_matchingbzrdir = property(_get_matching_bzrdir, _ignore_setting_bzrdir)
1118
def get_format_string(self):
1119
"""See RepositoryFormat.get_format_string()."""
1120
return ('Bazaar development format - chk repository with bencode '
1121
'revision serialization (needs bzr.dev from 1.16)\n')
1124
class RepositoryFormat2a(RepositoryFormatCHK2):
1125
"""A CHK repository that uses the bencode revision serializer.
1127
This is the same as RepositoryFormatCHK2 but with a public name.
1130
_serializer = chk_serializer.chk_bencode_serializer
1132
def _get_matching_bzrdir(self):
1133
return bzrdir.format_registry.make_bzrdir('2a')
1135
def _ignore_setting_bzrdir(self, format):
1138
_matchingbzrdir = property(_get_matching_bzrdir, _ignore_setting_bzrdir)
1140
def get_format_string(self):
1141
return ('Bazaar repository format 2a (needs bzr 1.16 or later)\n')
added
removed
bzrlib/repofmt/groupcompress_repo.py
