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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.index import GraphIndex, GraphIndexBuilder
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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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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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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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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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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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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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'text', 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.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 _already_packed(self):
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"""Is the collection already packed?"""
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# Always repack GC repositories for now
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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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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),
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access=self._pack_collection.inventory_index.data_access)
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self.revisions = GroupCompressVersionedFiles(
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_GCGraphIndex(self._pack_collection.revision_index.combined_index,
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add_callback=self._pack_collection.revision_index.add_callback,
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parents=True, is_locked=self.is_locked,
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track_external_parent_refs=True),
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access=self._pack_collection.revision_index.data_access,
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self.signatures = GroupCompressVersionedFiles(
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_GCGraphIndex(self._pack_collection.signature_index.combined_index,
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add_callback=self._pack_collection.signature_index.add_callback,
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parents=False, is_locked=self.is_locked),
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access=self._pack_collection.signature_index.data_access,
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self.texts = GroupCompressVersionedFiles(
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_GCGraphIndex(self._pack_collection.text_index.combined_index,
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add_callback=self._pack_collection.text_index.add_callback,
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parents=True, is_locked=self.is_locked),
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access=self._pack_collection.text_index.data_access)
644
# No parents, individual CHK pages don't have specific ancestry
645
self.chk_bytes = GroupCompressVersionedFiles(
646
_GCGraphIndex(self._pack_collection.chk_index.combined_index,
647
add_callback=self._pack_collection.chk_index.add_callback,
648
parents=False, is_locked=self.is_locked),
649
access=self._pack_collection.chk_index.data_access)
650
# True when the repository object is 'write locked' (as opposed to the
651
# physical lock only taken out around changes to the pack-names list.)
652
# Another way to represent this would be a decorator around the control
653
# files object that presents logical locks as physical ones - if this
654
# gets ugly consider that alternative design. RBC 20071011
655
self._write_lock_count = 0
656
self._transaction = None
658
self._reconcile_does_inventory_gc = True
659
self._reconcile_fixes_text_parents = True
660
self._reconcile_backsup_inventory = False
662
def _add_inventory_checked(self, revision_id, inv, parents):
663
"""Add inv to the repository after checking the inputs.
665
This function can be overridden to allow different inventory styles.
667
:seealso: add_inventory, for the contract.
670
serializer = self._format._serializer
671
result = inventory.CHKInventory.from_inventory(self.chk_bytes, inv,
672
maximum_size=serializer.maximum_size,
673
search_key_name=serializer.search_key_name)
674
inv_lines = result.to_lines()
675
return self._inventory_add_lines(revision_id, parents,
676
inv_lines, check_content=False)
678
def add_inventory_by_delta(self, basis_revision_id, delta, new_revision_id,
679
parents, basis_inv=None, propagate_caches=False):
680
"""Add a new inventory expressed as a delta against another revision.
682
:param basis_revision_id: The inventory id the delta was created
684
:param delta: The inventory delta (see Inventory.apply_delta for
686
:param new_revision_id: The revision id that the inventory is being
688
:param parents: The revision ids of the parents that revision_id is
689
known to have and are in the repository already. These are supplied
690
for repositories that depend on the inventory graph for revision
691
graph access, as well as for those that pun ancestry with delta
693
:param basis_inv: The basis inventory if it is already known,
695
:param propagate_caches: If True, the caches for this inventory are
696
copied to and updated for the result if possible.
698
:returns: (validator, new_inv)
699
The validator(which is a sha1 digest, though what is sha'd is
700
repository format specific) of the serialized inventory, and the
703
if basis_revision_id == _mod_revision.NULL_REVISION:
704
return KnitPackRepository.add_inventory_by_delta(self,
705
basis_revision_id, delta, new_revision_id, parents)
706
if not self.is_in_write_group():
707
raise AssertionError("%r not in write group" % (self,))
708
_mod_revision.check_not_reserved_id(new_revision_id)
709
basis_tree = self.revision_tree(basis_revision_id)
710
basis_tree.lock_read()
712
if basis_inv is None:
713
basis_inv = basis_tree.inventory
714
result = basis_inv.create_by_apply_delta(delta, new_revision_id,
715
propagate_caches=propagate_caches)
716
inv_lines = result.to_lines()
717
return self._inventory_add_lines(new_revision_id, parents,
718
inv_lines, check_content=False), result
722
def _iter_inventories(self, revision_ids):
723
"""Iterate over many inventory objects."""
724
keys = [(revision_id,) for revision_id in revision_ids]
725
stream = self.inventories.get_record_stream(keys, 'unordered', True)
727
for record in stream:
728
if record.storage_kind != 'absent':
729
texts[record.key] = record.get_bytes_as('fulltext')
731
raise errors.NoSuchRevision(self, record.key)
733
yield inventory.CHKInventory.deserialise(self.chk_bytes, texts[key], key)
735
def _iter_inventory_xmls(self, revision_ids):
736
# Without a native 'xml' inventory, this method doesn't make sense, so
737
# make it raise to trap naughty direct users.
738
raise NotImplementedError(self._iter_inventory_xmls)
740
def _find_present_inventory_keys(self, revision_keys):
741
parent_map = self.inventories.get_parent_map(revision_keys)
742
present_inventory_keys = set(k for k in parent_map)
743
return present_inventory_keys
745
def fileids_altered_by_revision_ids(self, revision_ids, _inv_weave=None):
746
"""Find the file ids and versions affected by revisions.
748
:param revisions: an iterable containing revision ids.
749
:param _inv_weave: The inventory weave from this repository or None.
750
If None, the inventory weave will be opened automatically.
751
:return: a dictionary mapping altered file-ids to an iterable of
752
revision_ids. Each altered file-ids has the exact revision_ids that
753
altered it listed explicitly.
755
rich_root = self.supports_rich_root()
756
bytes_to_info = inventory.CHKInventory._bytes_to_utf8name_key
757
file_id_revisions = {}
758
pb = ui.ui_factory.nested_progress_bar()
760
revision_keys = [(r,) for r in revision_ids]
761
parent_keys = self._find_parent_keys_of_revisions(revision_keys)
762
# TODO: instead of using _find_present_inventory_keys, change the
763
# code paths to allow missing inventories to be tolerated.
764
# However, we only want to tolerate missing parent
765
# inventories, not missing inventories for revision_ids
766
present_parent_inv_keys = self._find_present_inventory_keys(
768
present_parent_inv_ids = set(
769
[k[-1] for k in present_parent_inv_keys])
770
uninteresting_root_keys = set()
771
interesting_root_keys = set()
772
inventories_to_read = set(revision_ids)
773
inventories_to_read.update(present_parent_inv_ids)
774
for inv in self.iter_inventories(inventories_to_read):
775
entry_chk_root_key = inv.id_to_entry.key()
776
if inv.revision_id in present_parent_inv_ids:
777
uninteresting_root_keys.add(entry_chk_root_key)
779
interesting_root_keys.add(entry_chk_root_key)
781
chk_bytes = self.chk_bytes
782
for record, items in chk_map.iter_interesting_nodes(chk_bytes,
783
interesting_root_keys, uninteresting_root_keys,
785
for name, bytes in items:
786
(name_utf8, file_id, revision_id) = bytes_to_info(bytes)
787
if not rich_root and name_utf8 == '':
790
file_id_revisions[file_id].add(revision_id)
792
file_id_revisions[file_id] = set([revision_id])
795
return file_id_revisions
797
def find_text_key_references(self):
798
"""Find the text key references within the repository.
800
:return: A dictionary mapping text keys ((fileid, revision_id) tuples)
801
to whether they were referred to by the inventory of the
802
revision_id that they contain. The inventory texts from all present
803
revision ids are assessed to generate this report.
805
# XXX: Slow version but correct: rewrite as a series of delta
806
# examinations/direct tree traversal. Note that that will require care
807
# as a common node is reachable both from the inventory that added it,
808
# and others afterwards.
809
revision_keys = self.revisions.keys()
811
rich_roots = self.supports_rich_root()
812
pb = ui.ui_factory.nested_progress_bar()
814
all_revs = self.all_revision_ids()
815
total = len(all_revs)
816
for pos, inv in enumerate(self.iter_inventories(all_revs)):
817
pb.update("Finding text references", pos, total)
818
for _, entry in inv.iter_entries():
819
if not rich_roots and entry.file_id == inv.root_id:
821
key = (entry.file_id, entry.revision)
822
result.setdefault(key, False)
823
if entry.revision == inv.revision_id:
829
def _reconcile_pack(self, collection, packs, extension, revs, pb):
830
packer = GCCHKReconcilePacker(collection, packs, extension)
831
return packer.pack(pb)
833
def _get_source(self, to_format):
834
"""Return a source for streaming from this repository."""
835
if isinstance(to_format, remote.RemoteRepositoryFormat):
836
# Can't just check attributes on to_format with the current code,
838
to_format._ensure_real()
839
to_format = to_format._custom_format
840
if to_format.__class__ is self._format.__class__:
841
# We must be exactly the same format, otherwise stuff like the chk
842
# page layout might be different
843
return GroupCHKStreamSource(self, to_format)
844
return super(CHKInventoryRepository, self)._get_source(to_format)
847
class GroupCHKStreamSource(KnitPackStreamSource):
848
"""Used when both the source and target repo are GroupCHK repos."""
850
def __init__(self, from_repository, to_format):
851
"""Create a StreamSource streaming from from_repository."""
852
super(GroupCHKStreamSource, self).__init__(from_repository, to_format)
853
self._revision_keys = None
854
self._text_keys = None
855
self._text_fetch_order = 'groupcompress'
856
self._chk_id_roots = None
857
self._chk_p_id_roots = None
859
def _get_inventory_stream(self, inventory_keys, allow_absent=False):
860
"""Get a stream of inventory texts.
862
When this function returns, self._chk_id_roots and self._chk_p_id_roots
865
self._chk_id_roots = []
866
self._chk_p_id_roots = []
867
def _filtered_inv_stream():
869
p_id_roots_set = set()
870
source_vf = self.from_repository.inventories
871
stream = source_vf.get_record_stream(inventory_keys,
872
'groupcompress', True)
873
for record in stream:
874
if record.storage_kind == 'absent':
878
raise errors.NoSuchRevision(self, record.key)
879
bytes = record.get_bytes_as('fulltext')
880
chk_inv = inventory.CHKInventory.deserialise(None, bytes,
882
key = chk_inv.id_to_entry.key()
883
if key not in id_roots_set:
884
self._chk_id_roots.append(key)
885
id_roots_set.add(key)
886
p_id_map = chk_inv.parent_id_basename_to_file_id
888
raise AssertionError('Parent id -> file_id map not set')
890
if key not in p_id_roots_set:
891
p_id_roots_set.add(key)
892
self._chk_p_id_roots.append(key)
894
# We have finished processing all of the inventory records, we
895
# don't need these sets anymore
897
p_id_roots_set.clear()
898
return ('inventories', _filtered_inv_stream())
900
def _get_filtered_chk_streams(self, excluded_revision_keys):
901
self._text_keys = set()
902
excluded_revision_keys.discard(_mod_revision.NULL_REVISION)
903
if not excluded_revision_keys:
904
uninteresting_root_keys = set()
905
uninteresting_pid_root_keys = set()
907
# filter out any excluded revisions whose inventories are not
909
# TODO: Update Repository.iter_inventories() to add
910
# ignore_missing=True
911
present_keys = self.from_repository._find_present_inventory_keys(
912
excluded_revision_keys)
913
present_ids = [k[-1] for k in present_keys]
914
uninteresting_root_keys = set()
915
uninteresting_pid_root_keys = set()
916
for inv in self.from_repository.iter_inventories(present_ids):
917
uninteresting_root_keys.add(inv.id_to_entry.key())
918
uninteresting_pid_root_keys.add(
919
inv.parent_id_basename_to_file_id.key())
920
bytes_to_info = inventory.CHKInventory._bytes_to_utf8name_key
921
chk_bytes = self.from_repository.chk_bytes
922
def _filter_id_to_entry():
923
for record, items in chk_map.iter_interesting_nodes(chk_bytes,
924
self._chk_id_roots, uninteresting_root_keys):
925
for name, bytes in items:
926
# Note: we don't care about name_utf8, because we are always
928
_, file_id, revision_id = bytes_to_info(bytes)
929
self._text_keys.add((file_id, revision_id))
930
if record is not None:
933
self._chk_id_roots = None
934
yield 'chk_bytes', _filter_id_to_entry()
935
def _get_parent_id_basename_to_file_id_pages():
936
for record, items in chk_map.iter_interesting_nodes(chk_bytes,
937
self._chk_p_id_roots, uninteresting_pid_root_keys):
938
if record is not None:
941
self._chk_p_id_roots = None
942
yield 'chk_bytes', _get_parent_id_basename_to_file_id_pages()
944
def get_stream(self, search):
945
revision_ids = search.get_keys()
946
for stream_info in self._fetch_revision_texts(revision_ids):
948
self._revision_keys = [(rev_id,) for rev_id in revision_ids]
949
yield self._get_inventory_stream(self._revision_keys)
950
# TODO: The keys to exclude might be part of the search recipe
951
# For now, exclude all parents that are at the edge of ancestry, for
952
# which we have inventories
953
from_repo = self.from_repository
954
parent_keys = from_repo._find_parent_keys_of_revisions(
956
for stream_info in self._get_filtered_chk_streams(parent_keys):
958
yield self._get_text_stream()
960
def get_stream_for_missing_keys(self, missing_keys):
961
# missing keys can only occur when we are byte copying and not
962
# translating (because translation means we don't send
963
# unreconstructable deltas ever).
964
missing_inventory_keys = set()
965
for key in missing_keys:
966
if key[0] != 'inventories':
967
raise AssertionError('The only missing keys we should'
968
' be filling in are inventory keys, not %s'
970
missing_inventory_keys.add(key[1:])
971
if self._chk_id_roots or self._chk_p_id_roots:
972
raise AssertionError('Cannot call get_stream_for_missing_keys'
973
' untill all of get_stream() has been consumed.')
974
# Yield the inventory stream, so we can find the chk stream
975
# Some of the missing_keys will be missing because they are ghosts.
976
# As such, we can ignore them. The Sink is required to verify there are
977
# no unavailable texts when the ghost inventories are not filled in.
978
yield self._get_inventory_stream(missing_inventory_keys,
980
# We use the empty set for excluded_revision_keys, to make it clear
981
# that we want to transmit all referenced chk pages.
982
for stream_info in self._get_filtered_chk_streams(set()):
986
class RepositoryFormatCHK1(RepositoryFormatPack):
987
"""A hashed CHK+group compress pack repository."""
989
repository_class = CHKInventoryRepository
990
supports_external_lookups = True
992
# For right now, setting this to True gives us InterModel1And2 rather
993
# than InterDifferingSerializer
994
_commit_builder_class = PackRootCommitBuilder
995
rich_root_data = True
996
_serializer = chk_serializer.chk_serializer_255_bigpage
997
_commit_inv_deltas = True
998
# What index classes to use
999
index_builder_class = BTreeBuilder
1000
index_class = BTreeGraphIndex
1001
# Note: We cannot unpack a delta that references a text we haven't
1002
# seen yet. There are 2 options, work in fulltexts, or require
1003
# topological sorting. Using fulltexts is more optimal for local
1004
# operations, because the source can be smart about extracting
1005
# multiple in-a-row (and sharing strings). Topological is better
1006
# for remote, because we access less data.
1007
_fetch_order = 'unordered'
1008
_fetch_uses_deltas = False # essentially ignored by the groupcompress code.
1011
def _get_matching_bzrdir(self):
1012
return bzrdir.format_registry.make_bzrdir('development6-rich-root')
1014
def _ignore_setting_bzrdir(self, format):
1017
_matchingbzrdir = property(_get_matching_bzrdir, _ignore_setting_bzrdir)
1019
def get_format_string(self):
1020
"""See RepositoryFormat.get_format_string()."""
1021
return ('Bazaar development format - group compression and chk inventory'
1022
' (needs bzr.dev from 1.14)\n')
1024
def get_format_description(self):
1025
"""See RepositoryFormat.get_format_description()."""
1026
return ("Development repository format - rich roots, group compression"
1027
" and chk inventories")
1029
def check_conversion_target(self, target_format):
1030
if not target_format.rich_root_data:
1031
raise errors.BadConversionTarget(
1032
'Does not support rich root data.', target_format)
1033
if not getattr(target_format, 'supports_tree_reference', False):
1034
raise errors.BadConversionTarget(
1035
'Does not support nested trees', target_format)
1039
class RepositoryFormatCHK2(RepositoryFormatCHK1):
1040
"""A CHK repository that uses the bencode revision serializer."""
1042
_serializer = chk_serializer.chk_bencode_serializer
1044
def _get_matching_bzrdir(self):
1045
return bzrdir.format_registry.make_bzrdir('development7-rich-root')
1047
def _ignore_setting_bzrdir(self, format):
1050
_matchingbzrdir = property(_get_matching_bzrdir, _ignore_setting_bzrdir)
1052
def get_format_string(self):
1053
"""See RepositoryFormat.get_format_string()."""
1054
return ('Bazaar development format - chk repository with bencode '
1055
'revision serialization (needs bzr.dev from 1.16)\n')
1058
class RepositoryFormat2a(RepositoryFormatCHK2):
1059
"""A CHK repository that uses the bencode revision serializer.
1061
This is the same as RepositoryFormatCHK2 but with a public name.
1064
_serializer = chk_serializer.chk_bencode_serializer
1066
def _get_matching_bzrdir(self):
1067
return bzrdir.format_registry.make_bzrdir('2a')
1069
def _ignore_setting_bzrdir(self, format):
1072
_matchingbzrdir = property(_get_matching_bzrdir, _ignore_setting_bzrdir)
1074
def get_format_string(self):
1075
return ('Bazaar repository format 2a (needs bzr 1.16 or later)\n')
added
removed
bzrlib/repofmt/groupcompress_repo.py
