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# Copyright (C) 2005, 2006, 2007 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from itertools import izip
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from bzrlib.index import (
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GraphIndexPrefixAdapter,
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from bzrlib.knit import KnitGraphIndex, _PackAccess, _KnitData
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from bzrlib.osutils import rand_chars
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from bzrlib.pack import ContainerWriter
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from bzrlib.store import revision
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from bzrlib.decorators import needs_read_lock, needs_write_lock
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from bzrlib.repofmt.knitrepo import KnitRepository
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from bzrlib.repository import (
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MetaDirRepositoryFormat,
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import bzrlib.revision as _mod_revision
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from bzrlib.store.revision.knit import KnitRevisionStore
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from bzrlib.store.versioned import VersionedFileStore
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from bzrlib.trace import mutter, note, warning
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class PackCommitBuilder(CommitBuilder):
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"""A subclass of CommitBuilder to add texts with pack semantics.
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Specifically this uses one knit object rather than one knit object per
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added text, reducing memory and object pressure.
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def _add_text_to_weave(self, file_id, new_lines, parents, nostore_sha):
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return self.repository._pack_collection._add_text_to_weave(file_id,
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self._new_revision_id, new_lines, parents, nostore_sha,
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class PackRootCommitBuilder(RootCommitBuilder):
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"""A subclass of RootCommitBuilder to add texts with pack semantics.
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Specifically this uses one knit object rather than one knit object per
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added text, reducing memory and object pressure.
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def _add_text_to_weave(self, file_id, new_lines, parents, nostore_sha):
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return self.repository._pack_collection._add_text_to_weave(file_id,
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self._new_revision_id, new_lines, parents, nostore_sha,
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"""An in memory proxy for a pack and its indices.
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This is a base class that is not directly used, instead the classes
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ExistingPack and NewPack are used.
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def __init__(self, revision_index, inventory_index, text_index,
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"""Create a pack instance.
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:param revision_index: A GraphIndex for determining what revisions are
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present in the Pack and accessing the locations of their texts.
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:param inventory_index: A GraphIndex for determining what inventories are
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present in the Pack and accessing the locations of their
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:param text_index: A GraphIndex for determining what file texts
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are present in the pack and accessing the locations of their
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texts/deltas (via (fileid, revisionid) tuples).
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:param revision_index: A GraphIndex for determining what signatures are
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present in the Pack and accessing the locations of their texts.
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self.revision_index = revision_index
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self.inventory_index = inventory_index
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self.text_index = text_index
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self.signature_index = signature_index
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def access_tuple(self):
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"""Return a tuple (transport, name) for the pack content."""
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return self.pack_transport, self.file_name()
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"""Get the file name for the pack on disk."""
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return self.name + '.pack'
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def get_revision_count(self):
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return self.revision_index.key_count()
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def inventory_index_name(self, name):
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"""The inv index is the name + .iix."""
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return self.index_name('inventory', name)
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def revision_index_name(self, name):
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"""The revision index is the name + .rix."""
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return self.index_name('revision', name)
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def signature_index_name(self, name):
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"""The signature index is the name + .six."""
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return self.index_name('signature', name)
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def text_index_name(self, name):
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"""The text index is the name + .tix."""
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return self.index_name('text', name)
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class ExistingPack(Pack):
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"""An in memory proxy for an existing .pack and its disk indices."""
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def __init__(self, pack_transport, name, revision_index, inventory_index,
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text_index, signature_index):
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"""Create an ExistingPack object.
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:param pack_transport: The transport where the pack file resides.
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:param name: The name of the pack on disk in the pack_transport.
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Pack.__init__(self, revision_index, inventory_index, text_index,
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self.pack_transport = pack_transport
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assert None not in (revision_index, inventory_index, text_index,
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signature_index, name, pack_transport)
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def __eq__(self, other):
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return self.__dict__ == other.__dict__
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def __ne__(self, other):
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return not self.__eq__(other)
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return "<bzrlib.repofmt.pack_repo.Pack object at 0x%x, %s, %s" % (
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id(self), self.transport, self.name)
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"""An in memory proxy for a pack which is being created."""
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# A map of index 'type' to the file extension and position in the
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index_definitions = {
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'revision': ('.rix', 0),
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'inventory': ('.iix', 1),
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'signature': ('.six', 3),
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def __init__(self, upload_transport, index_transport, pack_transport,
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"""Create a NewPack instance.
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:param upload_transport: A writable transport for the pack to be
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incrementally uploaded to.
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:param index_transport: A writable transport for the pack's indices to
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be written to when the pack is finished.
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:param pack_transport: A writable transport for the pack to be renamed
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to when the upload is complete. This *must* be the same as
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upload_transport.clone('../packs').
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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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# 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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# Revisions: parents list, no text compression.
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InMemoryGraphIndex(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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InMemoryGraphIndex(reference_lists=2),
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# Texts: compression and per file graph, for all fileids - so two
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# reference lists and two elements in the key tuple.
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InMemoryGraphIndex(reference_lists=2, key_elements=2),
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# Signatures: Just blobs to store, no compression, no parents
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InMemoryGraphIndex(reference_lists=0),
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# where should the new pack be opened
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self.upload_transport = upload_transport
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# where are indices written out to
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self.index_transport = index_transport
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# where is the pack renamed to when it is finished?
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self.pack_transport = pack_transport
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# tracks the content written to the .pack file.
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self._hash = md5.new()
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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 = 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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if 'pack' in debug.debug_flags:
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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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"""Cancel creating this pack."""
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self._state = 'aborted'
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self.write_stream.close()
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# Remove the temporary pack file.
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self.upload_transport.delete(self.random_name)
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# The indices have no state on disk.
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def access_tuple(self):
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"""Return a tuple (transport, name) for the pack content."""
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assert self._state in ('open', 'finished')
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if self._state == 'finished':
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return Pack.access_tuple(self)
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return self.upload_transport, self.random_name
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def data_inserted(self):
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"""True if data has been added to this pack."""
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return bool(self.get_revision_count() or
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self.inventory_index.key_count() or
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self.text_index.key_count() or
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self.signature_index.key_count())
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"""Finish the new pack.
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- finalises the content
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- assigns a name (the md5 of the content, currently)
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- writes out the associated indices
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- renames the pack into place.
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- stores the index size tuple for the pack in the index_sizes
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self._write_data('', flush=True)
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self.name = self._hash.hexdigest()
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# XXX: It'd be better to write them all to temporary names, then
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# rename them all into place, so that the window when only some are
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# visible is smaller. On the other hand none will be seen until
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# they're in the names list.
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self.index_sizes = [None, None, None, None]
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self._write_index('revision', self.revision_index, 'revision')
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self._write_index('inventory', self.inventory_index, 'inventory')
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self._write_index('text', self.text_index, 'file texts')
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self._write_index('signature', self.signature_index,
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'revision signatures')
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self.write_stream.close()
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# Note that this will clobber an existing pack with the same name,
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# without checking for hash collisions. While this is undesirable this
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# is something that can be rectified in a subsequent release. One way
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# to rectify it may be to leave the pack at the original name, writing
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# its pack-names entry as something like 'HASH: index-sizes
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# temporary-name'. Allocate that and check for collisions, if it is
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# collision free then rename it into place. If clients know this scheme
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# they can handle missing-file errors by:
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# - try for HASH.pack
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# - try for temporary-name
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# - refresh the pack-list to see if the pack is now absent
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self.upload_transport.rename(self.random_name,
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'../packs/' + self.name + '.pack')
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self._state = 'finished'
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if 'pack' in debug.debug_flags:
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# XXX: size might be interesting?
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mutter('%s: create_pack: pack renamed into place: %s%s->%s%s t+%6.3fs',
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time.ctime(), self.upload_transport.base, self.random_name,
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self.pack_transport, self.name,
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time.time() - self.start_time)
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def index_name(self, index_type, name):
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"""Get the disk name of an index type for pack name 'name'."""
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return name + NewPack.index_definitions[index_type][0]
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def index_offset(self, index_type):
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"""Get the position in a index_size array for a given index type."""
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return NewPack.index_definitions[index_type][1]
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def _replace_index_with_readonly(self, index_type):
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setattr(self, index_type + '_index',
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GraphIndex(self.index_transport,
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self.index_name(index_type, self.name),
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self.index_sizes[self.index_offset(index_type)]))
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def set_write_cache_size(self, size):
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self._cache_limit = size
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def _write_index(self, index_type, index, label):
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"""Write out an index.
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:param index_type: The type of index to write - e.g. 'revision'.
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:param index: The index object to serialise.
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:param label: What label to give the index e.g. 'revision'.
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index_name = self.index_name(index_type, self.name)
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self.index_sizes[self.index_offset(index_type)] = \
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self.index_transport.put_file(index_name, index.finish())
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if 'pack' in debug.debug_flags:
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# XXX: size might be interesting?
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mutter('%s: create_pack: wrote %s index: %s%s t+%6.3fs',
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time.ctime(), label, self.upload_transport.base,
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self.random_name, time.time() - self.start_time)
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# Replace the writable index on this object with a readonly,
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# presently unloaded index. We should alter
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# the index layer to make its finish() error if add_node is
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# subsequently used. RBC
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self._replace_index_with_readonly(index_type)
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class AggregateIndex(object):
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"""An aggregated index for the RepositoryPackCollection.
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AggregateIndex is reponsible for managing the PackAccess object,
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Index-To-Pack mapping, and all indices list for a specific type of index
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such as 'revision index'.
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A CombinedIndex provides an index on a single key space built up
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from several on-disk indices. The AggregateIndex builds on this
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to provide a knit access layer, and allows having up to one writable
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index within the collection.
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# XXX: Probably 'can be written to' could/should be separated from 'acts
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# like a knit index' -- mbp 20071024
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"""Create an AggregateIndex."""
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self.index_to_pack = {}
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self.combined_index = CombinedGraphIndex([])
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self.knit_access = _PackAccess(self.index_to_pack)
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def replace_indices(self, index_to_pack, indices):
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"""Replace the current mappings with fresh ones.
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This should probably not be used eventually, rather incremental add and
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removal of indices. It has been added during refactoring of existing
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:param index_to_pack: A mapping from index objects to
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(transport, name) tuples for the pack file data.
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:param indices: A list of indices.
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# refresh the revision pack map dict without replacing the instance.
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self.index_to_pack.clear()
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self.index_to_pack.update(index_to_pack)
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# XXX: API break - clearly a 'replace' method would be good?
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self.combined_index._indices[:] = indices
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# the current add nodes callback for the current writable index if
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self.add_callback = None
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def add_index(self, index, pack):
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"""Add index to the aggregate, which is an index for Pack pack.
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Future searches on the aggregate index will seach this new index
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before all previously inserted indices.
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:param index: An Index for the pack.
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:param pack: A Pack instance.
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# expose it to the index map
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self.index_to_pack[index] = pack.access_tuple()
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# put it at the front of the linear index list
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self.combined_index.insert_index(0, index)
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def add_writable_index(self, index, pack):
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"""Add an index which is able to have data added to it.
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There can be at most one writable index at any time. Any
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modifications made to the knit are put into this index.
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:param index: An index from the pack parameter.
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:param pack: A Pack instance.
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assert self.add_callback is None, \
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"%s already has a writable index through %s" % \
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(self, self.add_callback)
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# allow writing: queue writes to a new index
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self.add_index(index, pack)
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# Updates the index to packs mapping as a side effect,
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self.knit_access.set_writer(pack._writer, index, pack.access_tuple())
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self.add_callback = index.add_nodes
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"""Reset all the aggregate data to nothing."""
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self.knit_access.set_writer(None, None, (None, None))
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self.index_to_pack.clear()
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del self.combined_index._indices[:]
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self.add_callback = None
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def remove_index(self, index, pack):
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"""Remove index from the indices used to answer queries.
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:param index: An index from the pack parameter.
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:param pack: A Pack instance.
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del self.index_to_pack[index]
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self.combined_index._indices.remove(index)
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if (self.add_callback is not None and
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getattr(index, 'add_nodes', None) == self.add_callback):
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self.add_callback = None
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self.knit_access.set_writer(None, None, (None, None))
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class RepositoryPackCollection(object):
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"""Management of packs within a repository."""
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def __init__(self, repo, transport, index_transport, upload_transport,
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"""Create a new RepositoryPackCollection.
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:param transport: Addresses the repository base directory
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(typically .bzr/repository/).
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:param index_transport: Addresses the directory containing indices.
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:param upload_transport: Addresses the directory into which packs are written
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while they're being created.
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:param pack_transport: Addresses the directory of existing complete packs.
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self.transport = transport
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self._index_transport = index_transport
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self._upload_transport = upload_transport
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self._pack_transport = pack_transport
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self._suffix_offsets = {'.rix': 0, '.iix': 1, '.tix': 2, '.six': 3}
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self._packs_by_name = {}
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# the previous pack-names content
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self._packs_at_load = None
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# when a pack is being created by this object, the state of that pack.
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self._new_pack = None
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# aggregated revision index data
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self.revision_index = AggregateIndex()
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self.inventory_index = AggregateIndex()
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self.text_index = AggregateIndex()
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self.signature_index = AggregateIndex()
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def add_pack_to_memory(self, pack):
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"""Make a Pack object available to the repository to satisfy queries.
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:param pack: A Pack object.
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assert pack.name not in self._packs_by_name
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self.packs.append(pack)
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self._packs_by_name[pack.name] = pack
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self.revision_index.add_index(pack.revision_index, pack)
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self.inventory_index.add_index(pack.inventory_index, pack)
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self.text_index.add_index(pack.text_index, pack)
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self.signature_index.add_index(pack.signature_index, pack)
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def _add_text_to_weave(self, file_id, revision_id, new_lines, parents,
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nostore_sha, random_revid):
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file_id_index = GraphIndexPrefixAdapter(
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self.text_index.combined_index,
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add_nodes_callback=self.text_index.add_callback)
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self.repo._text_knit._index._graph_index = file_id_index
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self.repo._text_knit._index._add_callback = file_id_index.add_nodes
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return self.repo._text_knit.add_lines_with_ghosts(
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revision_id, parents, new_lines, nostore_sha=nostore_sha,
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random_id=random_revid, check_content=False)[0:2]
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"""Return a list of all the Pack objects this repository has.
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Note that an in-progress pack being created is not returned.
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:return: A list of Pack objects for all the packs in the repository.
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for name in self.names():
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result.append(self.get_pack_by_name(name))
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"""Pack the pack collection incrementally.
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This will not attempt global reorganisation or recompression,
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rather it will just ensure that the total number of packs does
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not grow without bound. It uses the _max_pack_count method to
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determine if autopacking is needed, and the pack_distribution
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method to determine the number of revisions in each pack.
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If autopacking takes place then the packs name collection will have
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been flushed to disk - packing requires updating the name collection
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in synchronisation with certain steps. Otherwise the names collection
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:return: True if packing took place.
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# XXX: Should not be needed when the management of indices is sane.
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total_revisions = self.revision_index.combined_index.key_count()
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total_packs = len(self._names)
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if self._max_pack_count(total_revisions) >= total_packs:
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# XXX: the following may want to be a class, to pack with a given
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mutter('Auto-packing repository %s, which has %d pack files, '
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'containing %d revisions into %d packs.', self, total_packs,
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total_revisions, self._max_pack_count(total_revisions))
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# determine which packs need changing
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pack_distribution = self.pack_distribution(total_revisions)
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for pack in self.all_packs():
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revision_count = pack.get_revision_count()
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if revision_count == 0:
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# revision less packs are not generated by normal operation,
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# only by operations like sign-my-commits, and thus will not
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# tend to grow rapdily or without bound like commit containing
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# packs do - leave them alone as packing them really should
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# group their data with the relevant commit, and that may
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# involve rewriting ancient history - which autopack tries to
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# avoid. Alternatively we could not group the data but treat
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# each of these as having a single revision, and thus add
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# one revision for each to the total revision count, to get
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# a matching distribution.
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existing_packs.append((revision_count, pack))
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pack_operations = self.plan_autopack_combinations(
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existing_packs, pack_distribution)
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self._execute_pack_operations(pack_operations)
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def create_pack_from_packs(self, packs, suffix, revision_ids=None):
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"""Create a new pack by reading data from other packs.
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This does little more than a bulk copy of data. One key difference
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is that data with the same item key across multiple packs is elided
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from the output. The new pack is written into the current pack store
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along with its indices, and the name added to the pack names. The
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source packs are not altered and are not required to be in the current
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:param packs: An iterable of Packs to combine.
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:param revision_ids: Either None, to copy all data, or a list
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of revision_ids to limit the copied data to the data they
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:return: A Pack object, or None if nothing was copied.
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# open a pack - using the same name as the last temporary file
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# - which has already been flushed, so its safe.
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# XXX: - duplicate code warning with start_write_group; fix before
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# considering 'done'.
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if self._new_pack is not None:
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raise errors.BzrError('call to create_pack_from_packs while '
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'another pack is being written.')
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if revision_ids is not None and len(revision_ids) == 0:
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# silly fetch request.
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new_pack = NewPack(self._upload_transport, self._index_transport,
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self._pack_transport, upload_suffix=suffix)
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# buffer data - we won't be reading-back during the pack creation and
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# this makes a significant difference on sftp pushes.
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new_pack.set_write_cache_size(1024*1024)
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if 'pack' in debug.debug_flags:
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plain_pack_list = ['%s%s' % (a_pack.pack_transport.base, a_pack.name)
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if revision_ids is not None:
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rev_count = len(revision_ids)
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mutter('%s: create_pack: creating pack from source packs: '
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'%s%s %s revisions wanted %s t=0',
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time.ctime(), self._upload_transport.base, new_pack.random_name,
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plain_pack_list, rev_count)
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revision_keys = [(revision_id,) for revision_id in revision_ids]
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# select revision keys
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revision_index_map = self._packs_list_to_pack_map_and_index_list(
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packs, 'revision_index')[0]
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revision_nodes = self._index_contents(revision_index_map, revision_keys)
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# copy revision keys and adjust values
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list(self._copy_nodes_graph(revision_nodes, revision_index_map,
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new_pack._writer, new_pack.revision_index))
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if 'pack' in debug.debug_flags:
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mutter('%s: create_pack: revisions copied: %s%s %d items t+%6.3fs',
654
time.ctime(), self._upload_transport.base, new_pack.random_name,
655
new_pack.revision_index.key_count(),
656
time.time() - new_pack.start_time)
657
# select inventory keys
658
inv_keys = revision_keys # currently the same keyspace, and note that
659
# querying for keys here could introduce a bug where an inventory item
660
# is missed, so do not change it to query separately without cross
661
# checking like the text key check below.
662
inventory_index_map = self._packs_list_to_pack_map_and_index_list(
663
packs, 'inventory_index')[0]
664
inv_nodes = self._index_contents(inventory_index_map, inv_keys)
665
# copy inventory keys and adjust values
666
# XXX: Should be a helper function to allow different inv representation
668
inv_lines = self._copy_nodes_graph(inv_nodes, inventory_index_map,
669
new_pack._writer, new_pack.inventory_index, output_lines=True)
671
fileid_revisions = self.repo._find_file_ids_from_xml_inventory_lines(
672
inv_lines, revision_ids)
674
for fileid, file_revids in fileid_revisions.iteritems():
676
[(fileid, file_revid) for file_revid in file_revids])
678
# eat the iterator to cause it to execute.
681
if 'pack' in debug.debug_flags:
682
mutter('%s: create_pack: inventories copied: %s%s %d items t+%6.3fs',
683
time.ctime(), self._upload_transport.base, new_pack.random_name,
684
new_pack.inventory_index.key_count(),
685
time.time() - new_pack.start_time)
687
text_index_map = self._packs_list_to_pack_map_and_index_list(
688
packs, 'text_index')[0]
689
text_nodes = self._index_contents(text_index_map, text_filter)
690
if text_filter is not None:
691
# We could return the keys copied as part of the return value from
692
# _copy_nodes_graph but this doesn't work all that well with the
693
# need to get line output too, so we check separately, and as we're
694
# going to buffer everything anyway, we check beforehand, which
695
# saves reading knit data over the wire when we know there are
697
text_nodes = set(text_nodes)
698
present_text_keys = set(_node[1] for _node in text_nodes)
699
missing_text_keys = set(text_filter) - present_text_keys
700
if missing_text_keys:
701
# TODO: raise a specific error that can handle many missing
703
a_missing_key = missing_text_keys.pop()
704
raise errors.RevisionNotPresent(a_missing_key[1],
706
# copy text keys and adjust values
707
list(self._copy_nodes_graph(text_nodes, text_index_map,
708
new_pack._writer, new_pack.text_index))
709
if 'pack' in debug.debug_flags:
710
mutter('%s: create_pack: file texts copied: %s%s %d items t+%6.3fs',
711
time.ctime(), self._upload_transport.base, new_pack.random_name,
712
new_pack.text_index.key_count(),
713
time.time() - new_pack.start_time)
714
# select signature keys
715
signature_filter = revision_keys # same keyspace
716
signature_index_map = self._packs_list_to_pack_map_and_index_list(
717
packs, 'signature_index')[0]
718
signature_nodes = self._index_contents(signature_index_map,
720
# copy signature keys and adjust values
721
self._copy_nodes(signature_nodes, signature_index_map, new_pack._writer,
722
new_pack.signature_index)
723
if 'pack' in debug.debug_flags:
724
mutter('%s: create_pack: revision signatures copied: %s%s %d items t+%6.3fs',
725
time.ctime(), self._upload_transport.base, new_pack.random_name,
726
new_pack.signature_index.key_count(),
727
time.time() - new_pack.start_time)
728
if not new_pack.data_inserted():
732
self.allocate(new_pack)
735
def _execute_pack_operations(self, pack_operations):
736
"""Execute a series of pack operations.
738
:param pack_operations: A list of [revision_count, packs_to_combine].
741
for revision_count, packs in pack_operations:
742
# we may have no-ops from the setup logic
745
# have a progress bar?
746
self.create_pack_from_packs(packs, '.autopack')
748
self._remove_pack_from_memory(pack)
749
# record the newly available packs and stop advertising the old
751
self._save_pack_names()
752
# Move the old packs out of the way now they are no longer referenced.
753
for revision_count, packs in pack_operations:
754
self._obsolete_packs(packs)
756
def lock_names(self):
757
"""Acquire the mutex around the pack-names index.
759
This cannot be used in the middle of a read-only transaction on the
762
self.repo.control_files.lock_write()
765
"""Pack the pack collection totally."""
767
total_packs = len(self._names)
770
total_revisions = self.revision_index.combined_index.key_count()
771
# XXX: the following may want to be a class, to pack with a given
773
mutter('Packing repository %s, which has %d pack files, '
774
'containing %d revisions into 1 packs.', self, total_packs,
776
# determine which packs need changing
777
pack_distribution = [1]
778
pack_operations = [[0, []]]
779
for pack in self.all_packs():
780
revision_count = pack.get_revision_count()
781
pack_operations[-1][0] += revision_count
782
pack_operations[-1][1].append(pack)
783
self._execute_pack_operations(pack_operations)
785
def plan_autopack_combinations(self, existing_packs, pack_distribution):
786
"""Plan a pack operation.
788
:param existing_packs: The packs to pack. (A list of (revcount, Pack)
790
:param pack_distribution: A list with the number of revisions desired
793
if len(existing_packs) <= len(pack_distribution):
795
existing_packs.sort(reverse=True)
796
pack_operations = [[0, []]]
797
# plan out what packs to keep, and what to reorganise
798
while len(existing_packs):
799
# take the largest pack, and if its less than the head of the
800
# distribution chart we will include its contents in the new pack for
801
# that position. If its larger, we remove its size from the
803
next_pack_rev_count, next_pack = existing_packs.pop(0)
804
if next_pack_rev_count >= pack_distribution[0]:
805
# this is already packed 'better' than this, so we can
806
# not waste time packing it.
807
while next_pack_rev_count > 0:
808
next_pack_rev_count -= pack_distribution[0]
809
if next_pack_rev_count >= 0:
811
del pack_distribution[0]
813
# didn't use that entire bucket up
814
pack_distribution[0] = -next_pack_rev_count
816
# add the revisions we're going to add to the next output pack
817
pack_operations[-1][0] += next_pack_rev_count
818
# allocate this pack to the next pack sub operation
819
pack_operations[-1][1].append(next_pack)
820
if pack_operations[-1][0] >= pack_distribution[0]:
821
# this pack is used up, shift left.
822
del pack_distribution[0]
823
pack_operations.append([0, []])
825
return pack_operations
827
def _copy_nodes(self, nodes, index_map, writer, write_index):
828
# plan a readv on each source pack:
830
nodes = sorted(nodes)
831
# how to map this into knit.py - or knit.py into this?
832
# we don't want the typical knit logic, we want grouping by pack
833
# at this point - perhaps a helper library for the following code
834
# duplication points?
836
for index, key, value in nodes:
837
if index not in request_groups:
838
request_groups[index] = []
839
request_groups[index].append((key, value))
840
for index, items in request_groups.iteritems():
841
pack_readv_requests = []
842
for key, value in items:
843
# ---- KnitGraphIndex.get_position
844
bits = value[1:].split(' ')
845
offset, length = int(bits[0]), int(bits[1])
846
pack_readv_requests.append((offset, length, (key, value[0])))
847
# linear scan up the pack
848
pack_readv_requests.sort()
850
transport, path = index_map[index]
851
reader = pack.make_readv_reader(transport, path,
852
[offset[0:2] for offset in pack_readv_requests])
853
for (names, read_func), (_1, _2, (key, eol_flag)) in \
854
izip(reader.iter_records(), pack_readv_requests):
855
raw_data = read_func(None)
856
pos, size = writer.add_bytes_record(raw_data, names)
857
write_index.add_node(key, eol_flag + "%d %d" % (pos, size))
859
def _copy_nodes_graph(self, nodes, index_map, writer, write_index,
861
"""Copy knit nodes between packs.
863
:param output_lines: Return lines present in the copied data as
866
# for record verification
867
knit_data = _KnitData(None)
868
# for line extraction when requested (inventories only)
870
factory = knit.KnitPlainFactory()
871
# plan a readv on each source pack:
873
nodes = sorted(nodes)
874
# how to map this into knit.py - or knit.py into this?
875
# we don't want the typical knit logic, we want grouping by pack
876
# at this point - perhaps a helper library for the following code
877
# duplication points?
879
for index, key, value, references in nodes:
880
if index not in request_groups:
881
request_groups[index] = []
882
request_groups[index].append((key, value, references))
883
for index, items in request_groups.iteritems():
884
pack_readv_requests = []
885
for key, value, references in items:
886
# ---- KnitGraphIndex.get_position
887
bits = value[1:].split(' ')
888
offset, length = int(bits[0]), int(bits[1])
889
pack_readv_requests.append((offset, length, (key, value[0], references)))
890
# linear scan up the pack
891
pack_readv_requests.sort()
893
transport, path = index_map[index]
894
reader = pack.make_readv_reader(transport, path,
895
[offset[0:2] for offset in pack_readv_requests])
896
for (names, read_func), (_1, _2, (key, eol_flag, references)) in \
897
izip(reader.iter_records(), pack_readv_requests):
898
raw_data = read_func(None)
900
# read the entire thing
901
content, _ = knit_data._parse_record(key[-1], raw_data)
902
if len(references[-1]) == 0:
903
line_iterator = factory.get_fulltext_content(content)
905
line_iterator = factory.get_linedelta_content(content)
906
for line in line_iterator:
909
# check the header only
910
df, _ = knit_data._parse_record_header(key[-1], raw_data)
912
pos, size = writer.add_bytes_record(raw_data, names)
913
write_index.add_node(key, eol_flag + "%d %d" % (pos, size), references)
915
def ensure_loaded(self):
916
# NB: if you see an assertion error here, its probably access against
917
# an unlocked repo. Naughty.
918
assert self.repo.is_locked()
919
if self._names is None:
921
self._packs_at_load = set()
922
for index, key, value in self._iter_disk_pack_index():
924
self._names[name] = self._parse_index_sizes(value)
925
self._packs_at_load.add((key, value))
926
# populate all the metadata.
929
def _parse_index_sizes(self, value):
930
"""Parse a string of index sizes."""
931
return tuple([int(digits) for digits in value.split(' ')])
933
def get_pack_by_name(self, name):
934
"""Get a Pack object by name.
936
:param name: The name of the pack - e.g. '123456'
937
:return: A Pack object.
940
return self._packs_by_name[name]
942
rev_index = self._make_index(name, '.rix')
943
inv_index = self._make_index(name, '.iix')
944
txt_index = self._make_index(name, '.tix')
945
sig_index = self._make_index(name, '.six')
946
result = ExistingPack(self._pack_transport, name, rev_index,
947
inv_index, txt_index, sig_index)
948
self.add_pack_to_memory(result)
951
def allocate(self, a_new_pack):
952
"""Allocate name in the list of packs.
954
:param a_new_pack: A NewPack instance to be added to the collection of
955
packs for this repository.
958
if a_new_pack.name in self._names:
959
# a collision with the packs we know about (not the only possible
960
# collision, see NewPack.finish() for some discussion). Remove our
961
# prior reference to it.
962
self._remove_pack_from_memory(a_new_pack)
963
self._names[a_new_pack.name] = tuple(a_new_pack.index_sizes)
964
self.add_pack_to_memory(a_new_pack)
966
def _iter_disk_pack_index(self):
967
"""Iterate over the contents of the pack-names index.
969
This is used when loading the list from disk, and before writing to
970
detect updates from others during our write operation.
971
:return: An iterator of the index contents.
973
return GraphIndex(self.transport, 'pack-names', None
976
def _make_index(self, name, suffix):
977
size_offset = self._suffix_offsets[suffix]
978
index_name = name + suffix
979
index_size = self._names[name][size_offset]
981
self._index_transport, index_name, index_size)
983
def _max_pack_count(self, total_revisions):
984
"""Return the maximum number of packs to use for total revisions.
986
:param total_revisions: The total number of revisions in the
989
if not total_revisions:
991
digits = str(total_revisions)
998
"""Provide an order to the underlying names."""
999
return sorted(self._names.keys())
1001
def _obsolete_packs(self, packs):
1002
"""Move a number of packs which have been obsoleted out of the way.
1004
Each pack and its associated indices are moved out of the way.
1006
Note: for correctness this function should only be called after a new
1007
pack names index has been written without these pack names, and with
1008
the names of packs that contain the data previously available via these
1011
:param packs: The packs to obsolete.
1012
:param return: None.
1015
pack.pack_transport.rename(pack.file_name(),
1016
'../obsolete_packs/' + pack.file_name())
1017
# TODO: Probably needs to know all possible indices for this pack
1018
# - or maybe list the directory and move all indices matching this
1019
# name whether we recognize it or not?
1020
for suffix in ('.iix', '.six', '.tix', '.rix'):
1021
self._index_transport.rename(pack.name + suffix,
1022
'../obsolete_packs/' + pack.name + suffix)
1024
def pack_distribution(self, total_revisions):
1025
"""Generate a list of the number of revisions to put in each pack.
1027
:param total_revisions: The total number of revisions in the
1030
if total_revisions == 0:
1032
digits = reversed(str(total_revisions))
1034
for exponent, count in enumerate(digits):
1035
size = 10 ** exponent
1036
for pos in range(int(count)):
1038
return list(reversed(result))
1040
def _pack_tuple(self, name):
1041
"""Return a tuple with the transport and file name for a pack name."""
1042
return self._pack_transport, name + '.pack'
1044
def _remove_pack_from_memory(self, pack):
1045
"""Remove pack from the packs accessed by this repository.
1047
Only affects memory state, until self._save_pack_names() is invoked.
1049
self._names.pop(pack.name)
1050
self._packs_by_name.pop(pack.name)
1051
self._remove_pack_indices(pack)
1053
def _remove_pack_indices(self, pack):
1054
"""Remove the indices for pack from the aggregated indices."""
1055
self.revision_index.remove_index(pack.revision_index, pack)
1056
self.inventory_index.remove_index(pack.inventory_index, pack)
1057
self.text_index.remove_index(pack.text_index, pack)
1058
self.signature_index.remove_index(pack.signature_index, pack)
1061
"""Clear all cached data."""
1062
# cached revision data
1063
self.repo._revision_knit = None
1064
self.revision_index.clear()
1065
# cached signature data
1066
self.repo._signature_knit = None
1067
self.signature_index.clear()
1068
# cached file text data
1069
self.text_index.clear()
1070
self.repo._text_knit = None
1071
# cached inventory data
1072
self.inventory_index.clear()
1073
# remove the open pack
1074
self._new_pack = None
1075
# information about packs.
1078
self._packs_by_name = {}
1079
self._packs_at_load = None
1081
def _make_index_map(self, index_suffix):
1082
"""Return information on existing indices.
1084
:param suffix: Index suffix added to pack name.
1086
:returns: (pack_map, indices) where indices is a list of GraphIndex
1087
objects, and pack_map is a mapping from those objects to the
1088
pack tuple they describe.
1090
# TODO: stop using this; it creates new indices unnecessarily.
1091
self.ensure_loaded()
1092
suffix_map = {'.rix': 'revision_index',
1093
'.six': 'signature_index',
1094
'.iix': 'inventory_index',
1095
'.tix': 'text_index',
1097
return self._packs_list_to_pack_map_and_index_list(self.all_packs(),
1098
suffix_map[index_suffix])
1100
def _packs_list_to_pack_map_and_index_list(self, packs, index_attribute):
1101
"""Convert a list of packs to an index pack map and index list.
1103
:param packs: The packs list to process.
1104
:param index_attribute: The attribute that the desired index is found
1106
:return: A tuple (map, list) where map contains the dict from
1107
index:pack_tuple, and lsit contains the indices in the same order
1113
index = getattr(pack, index_attribute)
1114
indices.append(index)
1115
pack_map[index] = (pack.pack_transport, pack.file_name())
1116
return pack_map, indices
1118
def _index_contents(self, pack_map, key_filter=None):
1119
"""Get an iterable of the index contents from a pack_map.
1121
:param pack_map: A map from indices to pack details.
1122
:param key_filter: An optional filter to limit the
1125
indices = [index for index in pack_map.iterkeys()]
1126
all_index = CombinedGraphIndex(indices)
1127
if key_filter is None:
1128
return all_index.iter_all_entries()
1130
return all_index.iter_entries(key_filter)
1132
def _unlock_names(self):
1133
"""Release the mutex around the pack-names index."""
1134
self.repo.control_files.unlock()
1136
def _save_pack_names(self):
1137
"""Save the list of packs.
1139
This will take out the mutex around the pack names list for the
1140
duration of the method call. If concurrent updates have been made, a
1141
three-way merge between the current list and the current in memory list
1146
builder = GraphIndexBuilder()
1147
# load the disk nodes across
1149
for index, key, value in self._iter_disk_pack_index():
1150
disk_nodes.add((key, value))
1151
# do a two-way diff against our original content
1152
current_nodes = set()
1153
for name, sizes in self._names.iteritems():
1155
((name, ), ' '.join(str(size) for size in sizes)))
1156
deleted_nodes = self._packs_at_load - current_nodes
1157
new_nodes = current_nodes - self._packs_at_load
1158
disk_nodes.difference_update(deleted_nodes)
1159
disk_nodes.update(new_nodes)
1160
# TODO: handle same-name, index-size-changes here -
1161
# e.g. use the value from disk, not ours, *unless* we're the one
1163
for key, value in disk_nodes:
1164
builder.add_node(key, value)
1165
self.transport.put_file('pack-names', builder.finish())
1166
# move the baseline forward
1167
self._packs_at_load = disk_nodes
1169
self._unlock_names()
1170
# synchronise the memory packs list with what we just wrote:
1171
new_names = dict(disk_nodes)
1172
# drop no longer present nodes
1173
for pack in self.all_packs():
1174
if (pack.name,) not in new_names:
1175
self._remove_pack_from_memory(pack)
1176
# add new nodes/refresh existing ones
1177
for key, value in disk_nodes:
1179
sizes = self._parse_index_sizes(value)
1180
if name in self._names:
1182
if sizes != self._names[name]:
1183
# the pack for name has had its indices replaced - rare but
1184
# important to handle. XXX: probably can never happen today
1185
# because the three-way merge code above does not handle it
1186
# - you may end up adding the same key twice to the new
1187
# disk index because the set values are the same, unless
1188
# the only index shows up as deleted by the set difference
1189
# - which it may. Until there is a specific test for this,
1190
# assume its broken. RBC 20071017.
1191
self._remove_pack_from_memory(self.get_pack_by_name(name))
1192
self._names[name] = sizes
1193
self.get_pack_by_name(name)
1196
self._names[name] = sizes
1197
self.get_pack_by_name(name)
1199
def _start_write_group(self):
1200
# Do not permit preparation for writing if we're not in a 'write lock'.
1201
if not self.repo.is_write_locked():
1202
raise errors.NotWriteLocked(self)
1203
self._new_pack = NewPack(self._upload_transport, self._index_transport,
1204
self._pack_transport, upload_suffix='.pack')
1205
# allow writing: queue writes to a new index
1206
self.revision_index.add_writable_index(self._new_pack.revision_index,
1208
self.inventory_index.add_writable_index(self._new_pack.inventory_index,
1210
self.text_index.add_writable_index(self._new_pack.text_index,
1212
self.signature_index.add_writable_index(self._new_pack.signature_index,
1215
# reused revision and signature knits may need updating
1217
# "Hysterical raisins. client code in bzrlib grabs those knits outside
1218
# of write groups and then mutates it inside the write group."
1219
if self.repo._revision_knit is not None:
1220
self.repo._revision_knit._index._add_callback = \
1221
self.revision_index.add_callback
1222
if self.repo._signature_knit is not None:
1223
self.repo._signature_knit._index._add_callback = \
1224
self.signature_index.add_callback
1225
# create a reused knit object for text addition in commit.
1226
self.repo._text_knit = self.repo.weave_store.get_weave_or_empty(
1229
def _abort_write_group(self):
1230
# FIXME: just drop the transient index.
1231
# forget what names there are
1232
self._new_pack.abort()
1233
self._remove_pack_indices(self._new_pack)
1234
self._new_pack = None
1235
self.repo._text_knit = None
1237
def _commit_write_group(self):
1238
self._remove_pack_indices(self._new_pack)
1239
if self._new_pack.data_inserted():
1240
# get all the data to disk and read to use
1241
self._new_pack.finish()
1242
self.allocate(self._new_pack)
1243
self._new_pack = None
1244
if not self.autopack():
1245
# when autopack takes no steps, the names list is still
1247
self._save_pack_names()
1249
self._new_pack.abort()
1250
self.repo._text_knit = None
1253
class KnitPackRevisionStore(KnitRevisionStore):
1254
"""An object to adapt access from RevisionStore's to use KnitPacks.
1256
This class works by replacing the original RevisionStore.
1257
We need to do this because the KnitPackRevisionStore is less
1258
isolated in its layering - it uses services from the repo.
1261
def __init__(self, repo, transport, revisionstore):
1262
"""Create a KnitPackRevisionStore on repo with revisionstore.
1264
This will store its state in the Repository, use the
1265
indices to provide a KnitGraphIndex,
1266
and at the end of transactions write new indices.
1268
KnitRevisionStore.__init__(self, revisionstore.versioned_file_store)
1270
self._serializer = revisionstore._serializer
1271
self.transport = transport
1273
def get_revision_file(self, transaction):
1274
"""Get the revision versioned file object."""
1275
if getattr(self.repo, '_revision_knit', None) is not None:
1276
return self.repo._revision_knit
1277
self.repo._pack_collection.ensure_loaded()
1278
add_callback = self.repo._pack_collection.revision_index.add_callback
1279
# setup knit specific objects
1280
knit_index = KnitGraphIndex(
1281
self.repo._pack_collection.revision_index.combined_index,
1282
add_callback=add_callback)
1283
self.repo._revision_knit = knit.KnitVersionedFile(
1284
'revisions', self.transport.clone('..'),
1285
self.repo.control_files._file_mode,
1286
create=False, access_mode=self.repo._access_mode(),
1287
index=knit_index, delta=False, factory=knit.KnitPlainFactory(),
1288
access_method=self.repo._pack_collection.revision_index.knit_access)
1289
return self.repo._revision_knit
1291
def get_signature_file(self, transaction):
1292
"""Get the signature versioned file object."""
1293
if getattr(self.repo, '_signature_knit', None) is not None:
1294
return self.repo._signature_knit
1295
self.repo._pack_collection.ensure_loaded()
1296
add_callback = self.repo._pack_collection.signature_index.add_callback
1297
# setup knit specific objects
1298
knit_index = KnitGraphIndex(
1299
self.repo._pack_collection.signature_index.combined_index,
1300
add_callback=add_callback, parents=False)
1301
self.repo._signature_knit = knit.KnitVersionedFile(
1302
'signatures', self.transport.clone('..'),
1303
self.repo.control_files._file_mode,
1304
create=False, access_mode=self.repo._access_mode(),
1305
index=knit_index, delta=False, factory=knit.KnitPlainFactory(),
1306
access_method=self.repo._pack_collection.signature_index.knit_access)
1307
return self.repo._signature_knit
1310
class KnitPackTextStore(VersionedFileStore):
1311
"""Presents a TextStore abstraction on top of packs.
1313
This class works by replacing the original VersionedFileStore.
1314
We need to do this because the KnitPackRevisionStore is less
1315
isolated in its layering - it uses services from the repo and shares them
1316
with all the data written in a single write group.
1319
def __init__(self, repo, transport, weavestore):
1320
"""Create a KnitPackTextStore on repo with weavestore.
1322
This will store its state in the Repository, use the
1323
indices FileNames to provide a KnitGraphIndex,
1324
and at the end of transactions write new indices.
1326
# don't call base class constructor - it's not suitable.
1327
# no transient data stored in the transaction
1329
self._precious = False
1331
self.transport = transport
1332
self.weavestore = weavestore
1333
# XXX for check() which isn't updated yet
1334
self._transport = weavestore._transport
1336
def get_weave_or_empty(self, file_id, transaction):
1337
"""Get a 'Knit' backed by the .tix indices.
1339
The transaction parameter is ignored.
1341
self.repo._pack_collection.ensure_loaded()
1342
add_callback = self.repo._pack_collection.text_index.add_callback
1343
# setup knit specific objects
1344
file_id_index = GraphIndexPrefixAdapter(
1345
self.repo._pack_collection.text_index.combined_index,
1346
(file_id, ), 1, add_nodes_callback=add_callback)
1347
knit_index = KnitGraphIndex(file_id_index,
1348
add_callback=file_id_index.add_nodes,
1349
deltas=True, parents=True)
1350
return knit.KnitVersionedFile('text:' + file_id,
1351
self.transport.clone('..'),
1354
access_method=self.repo._pack_collection.text_index.knit_access,
1355
factory=knit.KnitPlainFactory())
1357
get_weave = get_weave_or_empty
1360
"""Generate a list of the fileids inserted, for use by check."""
1361
self.repo._pack_collection.ensure_loaded()
1363
for index, key, value, refs in \
1364
self.repo._pack_collection.text_index.combined_index.iter_all_entries():
1369
class InventoryKnitThunk(object):
1370
"""An object to manage thunking get_inventory_weave to pack based knits."""
1372
def __init__(self, repo, transport):
1373
"""Create an InventoryKnitThunk for repo at transport.
1375
This will store its state in the Repository, use the
1376
indices FileNames to provide a KnitGraphIndex,
1377
and at the end of transactions write a new index..
1380
self.transport = transport
1382
def get_weave(self):
1383
"""Get a 'Knit' that contains inventory data."""
1384
self.repo._pack_collection.ensure_loaded()
1385
add_callback = self.repo._pack_collection.inventory_index.add_callback
1386
# setup knit specific objects
1387
knit_index = KnitGraphIndex(
1388
self.repo._pack_collection.inventory_index.combined_index,
1389
add_callback=add_callback, deltas=True, parents=True)
1390
return knit.KnitVersionedFile(
1391
'inventory', self.transport.clone('..'),
1392
self.repo.control_files._file_mode,
1393
create=False, access_mode=self.repo._access_mode(),
1394
index=knit_index, delta=True, factory=knit.KnitPlainFactory(),
1395
access_method=self.repo._pack_collection.inventory_index.knit_access)
1398
class KnitPackRepository(KnitRepository):
1399
"""Experimental graph-knit using repository."""
1401
def __init__(self, _format, a_bzrdir, control_files, _revision_store,
1402
control_store, text_store, _commit_builder_class, _serializer):
1403
KnitRepository.__init__(self, _format, a_bzrdir, control_files,
1404
_revision_store, control_store, text_store, _commit_builder_class,
1406
index_transport = control_files._transport.clone('indices')
1407
self._pack_collection = RepositoryPackCollection(self, control_files._transport,
1409
control_files._transport.clone('upload'),
1410
control_files._transport.clone('packs'))
1411
self._revision_store = KnitPackRevisionStore(self, index_transport, self._revision_store)
1412
self.weave_store = KnitPackTextStore(self, index_transport, self.weave_store)
1413
self._inv_thunk = InventoryKnitThunk(self, index_transport)
1414
# True when the repository object is 'write locked' (as opposed to the
1415
# physical lock only taken out around changes to the pack-names list.)
1416
# Another way to represent this would be a decorator around the control
1417
# files object that presents logical locks as physical ones - if this
1418
# gets ugly consider that alternative design. RBC 20071011
1419
self._write_lock_count = 0
1420
self._transaction = None
1422
self._reconcile_does_inventory_gc = False
1423
self._reconcile_fixes_text_parents = False
1425
def _abort_write_group(self):
1426
self._pack_collection._abort_write_group()
1428
def _access_mode(self):
1429
"""Return 'w' or 'r' for depending on whether a write lock is active.
1431
This method is a helper for the Knit-thunking support objects.
1433
if self.is_write_locked():
1437
def get_parents(self, revision_ids):
1438
"""See StackedParentsProvider.get_parents.
1440
This implementation accesses the combined revision index to provide
1443
index = self._pack_collection.revision_index.combined_index
1445
for revision_id in revision_ids:
1446
if revision_id != _mod_revision.NULL_REVISION:
1447
search_keys.add((revision_id,))
1448
found_parents = {_mod_revision.NULL_REVISION:[]}
1449
for index, key, value, refs in index.iter_entries(search_keys):
1452
parents = (_mod_revision.NULL_REVISION,)
1454
parents = tuple(parent[0] for parent in parents)
1455
found_parents[key[0]] = parents
1457
for revision_id in revision_ids:
1459
result.append(found_parents[revision_id])
1464
def _make_parents_provider(self):
1467
def _refresh_data(self):
1468
if self._write_lock_count == 1 or self.control_files._lock_count == 1:
1469
# forget what names there are
1470
self._pack_collection.reset()
1471
# XXX: Better to do an in-memory merge when acquiring a new lock -
1472
# factor out code from _save_pack_names.
1474
def _start_write_group(self):
1475
self._pack_collection._start_write_group()
1477
def _commit_write_group(self):
1478
return self._pack_collection._commit_write_group()
1480
def get_inventory_weave(self):
1481
return self._inv_thunk.get_weave()
1483
def get_transaction(self):
1484
if self._write_lock_count:
1485
return self._transaction
1487
return self.control_files.get_transaction()
1489
def is_locked(self):
1490
return self._write_lock_count or self.control_files.is_locked()
1492
def is_write_locked(self):
1493
return self._write_lock_count
1495
def lock_write(self, token=None):
1496
if not self._write_lock_count and self.is_locked():
1497
raise errors.ReadOnlyError(self)
1498
self._write_lock_count += 1
1499
if self._write_lock_count == 1:
1500
from bzrlib import transactions
1501
self._transaction = transactions.WriteTransaction()
1502
self._refresh_data()
1504
def lock_read(self):
1505
if self._write_lock_count:
1506
self._write_lock_count += 1
1508
self.control_files.lock_read()
1509
self._refresh_data()
1511
def leave_lock_in_place(self):
1512
# not supported - raise an error
1513
raise NotImplementedError(self.leave_lock_in_place)
1515
def dont_leave_lock_in_place(self):
1516
# not supported - raise an error
1517
raise NotImplementedError(self.dont_leave_lock_in_place)
1521
"""Compress the data within the repository.
1523
This will pack all the data to a single pack. In future it may
1524
recompress deltas or do other such expensive operations.
1526
self._pack_collection.pack()
1529
def reconcile(self, other=None, thorough=False):
1530
"""Reconcile this repository."""
1531
from bzrlib.reconcile import PackReconciler
1532
reconciler = PackReconciler(self, thorough=thorough)
1533
reconciler.reconcile()
1537
if self._write_lock_count == 1 and self._write_group is not None:
1538
self.abort_write_group()
1539
self._transaction = None
1540
self._write_lock_count = 0
1541
raise errors.BzrError(
1542
'Must end write group before releasing write lock on %s'
1544
if self._write_lock_count:
1545
self._write_lock_count -= 1
1546
if not self._write_lock_count:
1547
transaction = self._transaction
1548
self._transaction = None
1549
transaction.finish()
1551
self.control_files.unlock()
1554
class RepositoryFormatPack(MetaDirRepositoryFormat):
1555
"""Format logic for pack structured repositories.
1557
This repository format has:
1558
- a list of packs in pack-names
1559
- packs in packs/NAME.pack
1560
- indices in indices/NAME.{iix,six,tix,rix}
1561
- knit deltas in the packs, knit indices mapped to the indices.
1562
- thunk objects to support the knits programming API.
1563
- a format marker of its own
1564
- an optional 'shared-storage' flag
1565
- an optional 'no-working-trees' flag
1569
# Set this attribute in derived classes to control the repository class
1570
# created by open and initialize.
1571
repository_class = None
1572
# Set this attribute in derived classes to control the
1573
# _commit_builder_class that the repository objects will have passed to
1574
# their constructor.
1575
_commit_builder_class = None
1576
# Set this attribute in derived clases to control the _serializer that the
1577
# repository objects will have passed to their constructor.
1580
def _get_control_store(self, repo_transport, control_files):
1581
"""Return the control store for this repository."""
1582
return VersionedFileStore(
1585
file_mode=control_files._file_mode,
1586
versionedfile_class=knit.KnitVersionedFile,
1587
versionedfile_kwargs={'factory': knit.KnitPlainFactory()},
1590
def _get_revision_store(self, repo_transport, control_files):
1591
"""See RepositoryFormat._get_revision_store()."""
1592
versioned_file_store = VersionedFileStore(
1594
file_mode=control_files._file_mode,
1597
versionedfile_class=knit.KnitVersionedFile,
1598
versionedfile_kwargs={'delta': False,
1599
'factory': knit.KnitPlainFactory(),
1603
return KnitRevisionStore(versioned_file_store)
1605
def _get_text_store(self, transport, control_files):
1606
"""See RepositoryFormat._get_text_store()."""
1607
return self._get_versioned_file_store('knits',
1610
versionedfile_class=knit.KnitVersionedFile,
1611
versionedfile_kwargs={
1612
'create_parent_dir': True,
1613
'delay_create': True,
1614
'dir_mode': control_files._dir_mode,
1618
def initialize(self, a_bzrdir, shared=False):
1619
"""Create a pack based repository.
1621
:param a_bzrdir: bzrdir to contain the new repository; must already
1623
:param shared: If true the repository will be initialized as a shared
1626
mutter('creating repository in %s.', a_bzrdir.transport.base)
1627
dirs = ['indices', 'obsolete_packs', 'packs', 'upload']
1628
builder = GraphIndexBuilder()
1629
files = [('pack-names', builder.finish())]
1630
utf8_files = [('format', self.get_format_string())]
1632
self._upload_blank_content(a_bzrdir, dirs, files, utf8_files, shared)
1633
return self.open(a_bzrdir=a_bzrdir, _found=True)
1635
def open(self, a_bzrdir, _found=False, _override_transport=None):
1636
"""See RepositoryFormat.open().
1638
:param _override_transport: INTERNAL USE ONLY. Allows opening the
1639
repository at a slightly different url
1640
than normal. I.e. during 'upgrade'.
1643
format = RepositoryFormat.find_format(a_bzrdir)
1644
assert format.__class__ == self.__class__
1645
if _override_transport is not None:
1646
repo_transport = _override_transport
1648
repo_transport = a_bzrdir.get_repository_transport(None)
1649
control_files = lockable_files.LockableFiles(repo_transport,
1650
'lock', lockdir.LockDir)
1651
text_store = self._get_text_store(repo_transport, control_files)
1652
control_store = self._get_control_store(repo_transport, control_files)
1653
_revision_store = self._get_revision_store(repo_transport, control_files)
1654
return self.repository_class(_format=self,
1656
control_files=control_files,
1657
_revision_store=_revision_store,
1658
control_store=control_store,
1659
text_store=text_store,
1660
_commit_builder_class=self._commit_builder_class,
1661
_serializer=self._serializer)
1664
class RepositoryFormatKnitPack1(RepositoryFormatPack):
1665
"""A no-subtrees parameterised Pack repository.
1667
This format was introduced in 0.92.
1670
repository_class = KnitPackRepository
1671
_commit_builder_class = PackCommitBuilder
1672
_serializer = xml5.serializer_v5
1674
def _get_matching_bzrdir(self):
1675
return bzrdir.format_registry.make_bzrdir('knitpack-experimental')
1677
def _ignore_setting_bzrdir(self, format):
1680
_matchingbzrdir = property(_get_matching_bzrdir, _ignore_setting_bzrdir)
1682
def get_format_string(self):
1683
"""See RepositoryFormat.get_format_string()."""
1684
return "Bazaar pack repository format 1 (needs bzr 0.92)\n"
1686
def get_format_description(self):
1687
"""See RepositoryFormat.get_format_description()."""
1688
return "Packs containing knits without subtree support"
1690
def check_conversion_target(self, target_format):
1694
class RepositoryFormatKnitPack3(RepositoryFormatPack):
1695
"""A subtrees parameterised Pack repository.
1697
This repository format uses the xml7 serializer to get:
1698
- support for recording full info about the tree root
1699
- support for recording tree-references
1701
This format was introduced in 0.92.
1704
repository_class = KnitPackRepository
1705
_commit_builder_class = PackRootCommitBuilder
1706
rich_root_data = True
1707
supports_tree_reference = True
1708
_serializer = xml7.serializer_v7
1710
def _get_matching_bzrdir(self):
1711
return bzrdir.format_registry.make_bzrdir(
1712
'knitpack-subtree-experimental')
1714
def _ignore_setting_bzrdir(self, format):
1717
_matchingbzrdir = property(_get_matching_bzrdir, _ignore_setting_bzrdir)
1719
def check_conversion_target(self, target_format):
1720
if not target_format.rich_root_data:
1721
raise errors.BadConversionTarget(
1722
'Does not support rich root data.', target_format)
1723
if not getattr(target_format, 'supports_tree_reference', False):
1724
raise errors.BadConversionTarget(
1725
'Does not support nested trees', target_format)
1727
def get_format_string(self):
1728
"""See RepositoryFormat.get_format_string()."""
1729
return "Bazaar pack repository format 1 with subtree support (needs bzr 0.92)\n"
1731
def get_format_description(self):
1732
"""See RepositoryFormat.get_format_description()."""
1733
return "Packs containing knits with subtree support\n"
added
removed
bzrlib/repofmt/pack_repo.py
