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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_ids(self, revision_ids):
741
keys = [(r,) for r in revision_ids]
742
parent_map = self.inventories.get_parent_map(keys)
743
present_inventory_ids = set(k[-1] for k in parent_map)
744
return present_inventory_ids
746
def fileids_altered_by_revision_ids(self, revision_ids, _inv_weave=None):
747
"""Find the file ids and versions affected by revisions.
749
:param revisions: an iterable containing revision ids.
750
:param _inv_weave: The inventory weave from this repository or None.
751
If None, the inventory weave will be opened automatically.
752
:return: a dictionary mapping altered file-ids to an iterable of
753
revision_ids. Each altered file-ids has the exact revision_ids that
754
altered it listed explicitly.
756
rich_root = self.supports_rich_root()
757
bytes_to_info = inventory.CHKInventory._bytes_to_utf8name_key
758
file_id_revisions = {}
759
pb = ui.ui_factory.nested_progress_bar()
761
parent_ids = self._find_parent_ids_of_revisions(revision_ids)
762
present_parent_inv_ids = self._find_present_inventory_ids(parent_ids)
763
uninteresting_root_keys = set()
764
interesting_root_keys = set()
765
inventories_to_read = set(present_parent_inv_ids)
766
inventories_to_read.update(revision_ids)
767
for inv in self.iter_inventories(inventories_to_read):
768
entry_chk_root_key = inv.id_to_entry.key()
769
if inv.revision_id in present_parent_inv_ids:
770
uninteresting_root_keys.add(entry_chk_root_key)
772
interesting_root_keys.add(entry_chk_root_key)
774
chk_bytes = self.chk_bytes
775
for record, items in chk_map.iter_interesting_nodes(chk_bytes,
776
interesting_root_keys, uninteresting_root_keys,
778
for name, bytes in items:
779
(name_utf8, file_id, revision_id) = bytes_to_info(bytes)
780
if not rich_root and name_utf8 == '':
783
file_id_revisions[file_id].add(revision_id)
785
file_id_revisions[file_id] = set([revision_id])
788
return file_id_revisions
790
def find_text_key_references(self):
791
"""Find the text key references within the repository.
793
:return: A dictionary mapping text keys ((fileid, revision_id) tuples)
794
to whether they were referred to by the inventory of the
795
revision_id that they contain. The inventory texts from all present
796
revision ids are assessed to generate this report.
798
# XXX: Slow version but correct: rewrite as a series of delta
799
# examinations/direct tree traversal. Note that that will require care
800
# as a common node is reachable both from the inventory that added it,
801
# and others afterwards.
802
revision_keys = self.revisions.keys()
804
rich_roots = self.supports_rich_root()
805
pb = ui.ui_factory.nested_progress_bar()
807
all_revs = self.all_revision_ids()
808
total = len(all_revs)
809
for pos, inv in enumerate(self.iter_inventories(all_revs)):
810
pb.update("Finding text references", pos, total)
811
for _, entry in inv.iter_entries():
812
if not rich_roots and entry.file_id == inv.root_id:
814
key = (entry.file_id, entry.revision)
815
result.setdefault(key, False)
816
if entry.revision == inv.revision_id:
822
def _reconcile_pack(self, collection, packs, extension, revs, pb):
823
packer = GCCHKReconcilePacker(collection, packs, extension)
824
return packer.pack(pb)
826
def _get_source(self, to_format):
827
"""Return a source for streaming from this repository."""
828
if isinstance(to_format, remote.RemoteRepositoryFormat):
829
# Can't just check attributes on to_format with the current code,
831
to_format._ensure_real()
832
to_format = to_format._custom_format
833
if to_format.__class__ is self._format.__class__:
834
# We must be exactly the same format, otherwise stuff like the chk
835
# page layout might be different
836
return GroupCHKStreamSource(self, to_format)
837
return super(CHKInventoryRepository, self)._get_source(to_format)
840
class GroupCHKStreamSource(KnitPackStreamSource):
841
"""Used when both the source and target repo are GroupCHK repos."""
843
def __init__(self, from_repository, to_format):
844
"""Create a StreamSource streaming from from_repository."""
845
super(GroupCHKStreamSource, self).__init__(from_repository, to_format)
846
self._revision_keys = None
847
self._text_keys = None
848
self._text_fetch_order = 'groupcompress'
849
self._chk_id_roots = None
850
self._chk_p_id_roots = None
852
def _get_inventory_stream(self, inventory_keys):
853
"""Get a stream of inventory texts.
855
When this function returns, self._chk_id_roots and self._chk_p_id_roots
858
self._chk_id_roots = []
859
self._chk_p_id_roots = []
860
def _filtered_inv_stream():
862
p_id_roots_set = set()
863
source_vf = self.from_repository.inventories
864
stream = source_vf.get_record_stream(inventory_keys,
865
'groupcompress', True)
866
for record in stream:
867
bytes = record.get_bytes_as('fulltext')
868
chk_inv = inventory.CHKInventory.deserialise(None, bytes,
870
key = chk_inv.id_to_entry.key()
871
if key not in id_roots_set:
872
self._chk_id_roots.append(key)
873
id_roots_set.add(key)
874
p_id_map = chk_inv.parent_id_basename_to_file_id
876
raise AssertionError('Parent id -> file_id map not set')
878
if key not in p_id_roots_set:
879
p_id_roots_set.add(key)
880
self._chk_p_id_roots.append(key)
882
# We have finished processing all of the inventory records, we
883
# don't need these sets anymore
885
p_id_roots_set.clear()
886
return ('inventories', _filtered_inv_stream())
888
def _get_filtered_chk_streams(self, excluded_revision_ids):
889
self._text_keys = set()
890
excluded_revision_ids.discard(_mod_revision.NULL_REVISION)
891
if not excluded_revision_ids:
892
uninteresting_root_keys = set()
893
uninteresting_pid_root_keys = set()
895
# filter out any excluded revisions whose inventories are not
897
# TODO: Update Repository.iter_inventories() to add
898
# ignore_missing=True
899
present_ids = self.from_repository._find_present_inventory_ids(
900
excluded_revision_ids)
901
uninteresting_root_keys = set()
902
uninteresting_pid_root_keys = set()
903
for inv in self.from_repository.iter_inventories(present_ids):
904
uninteresting_root_keys.add(inv.id_to_entry.key())
905
uninteresting_pid_root_keys.add(
906
inv.parent_id_basename_to_file_id.key())
907
bytes_to_info = inventory.CHKInventory._bytes_to_utf8name_key
908
chk_bytes = self.from_repository.chk_bytes
909
def _filter_id_to_entry():
910
for record, items in chk_map.iter_interesting_nodes(chk_bytes,
911
self._chk_id_roots, uninteresting_root_keys):
912
for name, bytes in items:
913
# Note: we don't care about name_utf8, because we are always
915
_, file_id, revision_id = bytes_to_info(bytes)
916
self._text_keys.add((file_id, revision_id))
917
if record is not None:
920
self._chk_id_roots = None
921
yield 'chk_bytes', _filter_id_to_entry()
922
def _get_parent_id_basename_to_file_id_pages():
923
for record, items in chk_map.iter_interesting_nodes(chk_bytes,
924
self._chk_p_id_roots, uninteresting_pid_root_keys):
925
if record is not None:
928
self._chk_p_id_roots = None
929
yield 'chk_bytes', _get_parent_id_basename_to_file_id_pages()
931
def get_stream(self, search):
932
revision_ids = search.get_keys()
933
for stream_info in self._fetch_revision_texts(revision_ids):
935
self._revision_keys = [(rev_id,) for rev_id in revision_ids]
936
yield self._get_inventory_stream(self._revision_keys)
937
# TODO: The keys to exclude might be part of the search recipe
938
# For now, exclude all parents that are at the edge of ancestry, for
939
# which we have inventories
940
from_repo = self.from_repository
941
parent_ids = from_repo._find_parent_ids_of_revisions(revision_ids)
942
for stream_info in self._get_filtered_chk_streams(parent_ids):
944
yield self._get_text_stream()
946
def get_stream_for_missing_keys(self, missing_keys):
947
# missing keys can only occur when we are byte copying and not
948
# translating (because translation means we don't send
949
# unreconstructable deltas ever).
950
missing_inventory_keys = set()
951
for key in missing_keys:
952
if key[0] != 'inventories':
953
raise AssertionError('The only missing keys we should'
954
' be filling in are inventory keys, not %s'
956
missing_inventory_keys.add(key[1:])
957
if self._chk_id_roots or self._chk_p_id_roots:
958
raise AssertionError('Cannot call get_stream_for_missing_keys'
959
' untill all of get_stream() has been consumed.')
960
# Yield the inventory stream, so we can find the chk stream
961
yield self._get_inventory_stream(missing_inventory_keys)
962
# We use the empty set for excluded_revision_ids, to make it clear that
963
# we want to transmit all referenced chk pages.
964
for stream_info in self._get_filtered_chk_streams(set()):
968
class RepositoryFormatCHK1(RepositoryFormatPack):
969
"""A hashed CHK+group compress pack repository."""
971
repository_class = CHKInventoryRepository
972
supports_external_lookups = True
974
# For right now, setting this to True gives us InterModel1And2 rather
975
# than InterDifferingSerializer
976
_commit_builder_class = PackRootCommitBuilder
977
rich_root_data = True
978
_serializer = chk_serializer.chk_serializer_255_bigpage
979
_commit_inv_deltas = True
980
# What index classes to use
981
index_builder_class = BTreeBuilder
982
index_class = BTreeGraphIndex
983
# Note: We cannot unpack a delta that references a text we haven't
984
# seen yet. There are 2 options, work in fulltexts, or require
985
# topological sorting. Using fulltexts is more optimal for local
986
# operations, because the source can be smart about extracting
987
# multiple in-a-row (and sharing strings). Topological is better
988
# for remote, because we access less data.
989
_fetch_order = 'unordered'
990
_fetch_uses_deltas = False # essentially ignored by the groupcompress code.
993
def _get_matching_bzrdir(self):
994
return bzrdir.format_registry.make_bzrdir('development6-rich-root')
996
def _ignore_setting_bzrdir(self, format):
999
_matchingbzrdir = property(_get_matching_bzrdir, _ignore_setting_bzrdir)
1001
def get_format_string(self):
1002
"""See RepositoryFormat.get_format_string()."""
1003
return ('Bazaar development format - group compression and chk inventory'
1004
' (needs bzr.dev from 1.14)\n')
1006
def get_format_description(self):
1007
"""See RepositoryFormat.get_format_description()."""
1008
return ("Development repository format - rich roots, group compression"
1009
" and chk inventories")
1011
def check_conversion_target(self, target_format):
1012
if not target_format.rich_root_data:
1013
raise errors.BadConversionTarget(
1014
'Does not support rich root data.', target_format)
1015
if not getattr(target_format, 'supports_tree_reference', False):
1016
raise errors.BadConversionTarget(
1017
'Does not support nested trees', target_format)
added
removed
bzrlib/repofmt/groupcompress_repo.py
