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- Committer: Robert Collins
- Date: 2006-03-01 03:26:23 UTC
- mto: (1594.2.4 integration)
- mto: This revision was merged to the branch mainline in revision 1596.
- Revision ID: robertc@robertcollins.net-20060301032623-9d3c073e102f2239
Move WeaveStore down into bzrlib.store.versioned.weave.
- files added:
- .bzrignore
- bzrlib
- bzrlib/doc
- bzrlib/doc/api
- bzrlib/export
- bzrlib/plugins
- bzrlib/store
- bzrlib/store/versioned
- bzrlib/tests
- bzrlib/tests/blackbox
- bzrlib/tests/branch_implementations
- bzrlib/tests/bzrdir_implementations
- bzrlib/tests/interrepository_implementations
- bzrlib/tests/repository_implementations
- bzrlib/tests/workingtree_implementations
- bzrlib/transport
- bzrlib/ui
- bzrlib/util
- bzrlib/util/configobj
- bzrlib/util/configobj/docs
- bzrlib/util/effbot
- bzrlib/util/effbot/org
- bzrlib/util/elementtree
- bzrlib/util/urlgrabber
- contrib
- contrib/bash
- contrib/emacs
- contrib/zsh
- doc
- notes
- tools
- tools/doc_generate
- files removed:
- .bzrignore
- foreign
- notes
- tests
added
removed
bzrlib/repository.py
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# Copyright (C) 2005 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 copy import deepcopy
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from cStringIO import StringIO
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from unittest import TestSuite
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import xml.sax.saxutils
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from bzrlib.decorators import needs_read_lock, needs_write_lock
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import bzrlib.errors as errors
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from bzrlib.errors import InvalidRevisionId
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from bzrlib.lockable_files import LockableFiles
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from bzrlib.osutils import safe_unicode
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from bzrlib.revision import NULL_REVISION
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from bzrlib.store import copy_all
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from bzrlib.store.versioned.weave import WeaveStore
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from bzrlib.store.text import TextStore
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from bzrlib.symbol_versioning import *
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from bzrlib.trace import mutter
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from bzrlib.tree import RevisionTree
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from bzrlib.testament import Testament
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from bzrlib.tree import EmptyTree
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import bzrlib.ui
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import bzrlib.xml5
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class Repository(object):
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"""Repository holding history for one or more branches.
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The repository holds and retrieves historical information including
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revisions and file history. It's normally accessed only by the Branch,
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which views a particular line of development through that history.
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The Repository builds on top of Stores and a Transport, which respectively
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describe the disk data format and the way of accessing the (possibly
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remote) disk.
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"""
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@needs_read_lock
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def _all_possible_ids(self):
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"""Return all the possible revisions that we could find."""
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return self.get_inventory_weave().versions()
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@needs_read_lock
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def all_revision_ids(self):
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"""Returns a list of all the revision ids in the repository.
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These are in as much topological order as the underlying store can
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present: for weaves ghosts may lead to a lack of correctness until
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the reweave updates the parents list.
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"""
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result = self._all_possible_ids()
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return self._eliminate_revisions_not_present(result)
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@needs_read_lock
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def _eliminate_revisions_not_present(self, revision_ids):
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"""Check every revision id in revision_ids to see if we have it.
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Returns a set of the present revisions.
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"""
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result = []
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for id in revision_ids:
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if self.has_revision(id):
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result.append(id)
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return result
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@staticmethod
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def create(a_bzrdir):
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"""Construct the current default format repository in a_bzrdir."""
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return RepositoryFormat.get_default_format().initialize(a_bzrdir)
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def __init__(self, _format, a_bzrdir, control_files, revision_store):
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"""instantiate a Repository.
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:param _format: The format of the repository on disk.
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:param a_bzrdir: The BzrDir of the repository.
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In the future we will have a single api for all stores for
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getting file texts, inventories and revisions, then
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this construct will accept instances of those things.
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"""
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object.__init__(self)
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self._format = _format
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# the following are part of the public API for Repository:
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self.bzrdir = a_bzrdir
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self.control_files = control_files
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self.revision_store = revision_store
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def lock_write(self):
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self.control_files.lock_write()
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def lock_read(self):
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self.control_files.lock_read()
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@needs_read_lock
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def missing_revision_ids(self, other, revision_id=None):
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"""Return the revision ids that other has that this does not.
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These are returned in topological order.
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revision_id: only return revision ids included by revision_id.
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"""
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return InterRepository.get(other, self).missing_revision_ids(revision_id)
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@staticmethod
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def open(base):
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"""Open the repository rooted at base.
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For instance, if the repository is at URL/.bzr/repository,
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Repository.open(URL) -> a Repository instance.
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"""
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control = bzrlib.bzrdir.BzrDir.open(base)
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return control.open_repository()
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def copy_content_into(self, destination, revision_id=None, basis=None):
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"""Make a complete copy of the content in self into destination.
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This is a destructive operation! Do not use it on existing
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repositories.
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"""
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return InterRepository.get(self, destination).copy_content(revision_id, basis)
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def fetch(self, source, revision_id=None, pb=None):
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"""Fetch the content required to construct revision_id from source.
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If revision_id is None all content is copied.
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"""
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return InterRepository.get(source, self).fetch(revision_id=revision_id,
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pb=pb)
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def unlock(self):
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self.control_files.unlock()
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@needs_read_lock
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def clone(self, a_bzrdir, revision_id=None, basis=None):
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"""Clone this repository into a_bzrdir using the current format.
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Currently no check is made that the format of this repository and
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the bzrdir format are compatible. FIXME RBC 20060201.
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"""
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if not isinstance(a_bzrdir._format, self.bzrdir._format.__class__):
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# use target default format.
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result = a_bzrdir.create_repository()
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# FIXME RBC 20060209 split out the repository type to avoid this check ?
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elif isinstance(a_bzrdir._format,
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(bzrlib.bzrdir.BzrDirFormat4,
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bzrlib.bzrdir.BzrDirFormat5,
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bzrlib.bzrdir.BzrDirFormat6)):
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result = a_bzrdir.open_repository()
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else:
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result = self._format.initialize(a_bzrdir, shared=self.is_shared())
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self.copy_content_into(result, revision_id, basis)
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return result
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def has_revision(self, revision_id):
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"""True if this branch has a copy of the revision.
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This does not necessarily imply the revision is merge
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or on the mainline."""
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return (revision_id is None
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or self.revision_store.has_id(revision_id))
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@needs_read_lock
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def get_revision_xml_file(self, revision_id):
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"""Return XML file object for revision object."""
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if not revision_id or not isinstance(revision_id, basestring):
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raise InvalidRevisionId(revision_id=revision_id, branch=self)
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try:
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return self.revision_store.get(revision_id)
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except (IndexError, KeyError):
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raise bzrlib.errors.NoSuchRevision(self, revision_id)
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@needs_read_lock
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def get_revision_xml(self, revision_id):
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return self.get_revision_xml_file(revision_id).read()
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@needs_read_lock
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def get_revision(self, revision_id):
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"""Return the Revision object for a named revision"""
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xml_file = self.get_revision_xml_file(revision_id)
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try:
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r = bzrlib.xml5.serializer_v5.read_revision(xml_file)
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except SyntaxError, e:
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raise bzrlib.errors.BzrError('failed to unpack revision_xml',
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[revision_id,
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str(e)])
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assert r.revision_id == revision_id
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return r
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@needs_read_lock
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def get_revision_sha1(self, revision_id):
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"""Hash the stored value of a revision, and return it."""
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# In the future, revision entries will be signed. At that
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# point, it is probably best *not* to include the signature
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# in the revision hash. Because that lets you re-sign
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# the revision, (add signatures/remove signatures) and still
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# have all hash pointers stay consistent.
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# But for now, just hash the contents.
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return bzrlib.osutils.sha_file(self.get_revision_xml_file(revision_id))
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@needs_write_lock
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def store_revision_signature(self, gpg_strategy, plaintext, revision_id):
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self.revision_store.add(StringIO(gpg_strategy.sign(plaintext)),
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revision_id, "sig")
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def fileid_involved_between_revs(self, from_revid, to_revid):
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"""Find file_id(s) which are involved in the changes between revisions.
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This determines the set of revisions which are involved, and then
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finds all file ids affected by those revisions.
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"""
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# TODO: jam 20060119 This code assumes that w.inclusions will
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# always be correct. But because of the presence of ghosts
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# it is possible to be wrong.
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# One specific example from Robert Collins:
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# Two branches, with revisions ABC, and AD
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# C is a ghost merge of D.
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# Inclusions doesn't recognize D as an ancestor.
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# If D is ever merged in the future, the weave
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# won't be fixed, because AD never saw revision C
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# to cause a conflict which would force a reweave.
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w = self.get_inventory_weave()
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from_set = set(w.inclusions([w.lookup(from_revid)]))
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to_set = set(w.inclusions([w.lookup(to_revid)]))
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included = to_set.difference(from_set)
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changed = map(w.idx_to_name, included)
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return self._fileid_involved_by_set(changed)
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def fileid_involved(self, last_revid=None):
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"""Find all file_ids modified in the ancestry of last_revid.
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:param last_revid: If None, last_revision() will be used.
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"""
250
w = self.get_inventory_weave()
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if not last_revid:
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changed = set(w._names)
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else:
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included = w.inclusions([w.lookup(last_revid)])
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changed = map(w.idx_to_name, included)
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return self._fileid_involved_by_set(changed)
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def fileid_involved_by_set(self, changes):
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"""Find all file_ids modified by the set of revisions passed in.
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:param changes: A set() of revision ids
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"""
263
# TODO: jam 20060119 This line does *nothing*, remove it.
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# or better yet, change _fileid_involved_by_set so
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# that it takes the inventory weave, rather than
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# pulling it out by itself.
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return self._fileid_involved_by_set(changes)
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def _fileid_involved_by_set(self, changes):
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"""Find the set of file-ids affected by the set of revisions.
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:param changes: A set() of revision ids.
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:return: A set() of file ids.
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This peaks at the Weave, interpreting each line, looking to
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see if it mentions one of the revisions. And if so, includes
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the file id mentioned.
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This expects both the Weave format, and the serialization
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to have a single line per file/directory, and to have
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fileid="" and revision="" on that line.
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"""
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assert isinstance(self._format, (RepositoryFormat5,
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RepositoryFormat6,
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RepositoryFormat7,
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RepositoryFormatKnit1)), \
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"fileid_involved only supported for branches which store inventory as unnested xml"
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w = self.get_inventory_weave()
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file_ids = set()
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for line in w._weave:
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# it is ugly, but it is due to the weave structure
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if not isinstance(line, basestring): continue
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start = line.find('file_id="')+9
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if start < 9: continue
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end = line.find('"', start)
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assert end>= 0
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file_id = xml.sax.saxutils.unescape(line[start:end])
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# check if file_id is already present
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if file_id in file_ids: continue
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start = line.find('revision="')+10
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if start < 10: continue
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end = line.find('"', start)
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assert end>= 0
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revision_id = xml.sax.saxutils.unescape(line[start:end])
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if revision_id in changes:
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file_ids.add(file_id)
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return file_ids
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@needs_read_lock
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def get_inventory_weave(self):
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return self.control_weaves.get_weave('inventory',
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self.get_transaction())
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@needs_read_lock
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def get_inventory(self, revision_id):
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"""Get Inventory object by hash."""
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xml = self.get_inventory_xml(revision_id)
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return bzrlib.xml5.serializer_v5.read_inventory_from_string(xml)
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@needs_read_lock
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def get_inventory_xml(self, revision_id):
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"""Get inventory XML as a file object."""
328
try:
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assert isinstance(revision_id, basestring), type(revision_id)
330
iw = self.get_inventory_weave()
331
return iw.get_text(iw.lookup(revision_id))
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except IndexError:
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raise bzrlib.errors.HistoryMissing(self, 'inventory', revision_id)
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@needs_read_lock
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def get_inventory_sha1(self, revision_id):
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"""Return the sha1 hash of the inventory entry
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"""
339
return self.get_revision(revision_id).inventory_sha1
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@needs_read_lock
342
def get_revision_inventory(self, revision_id):
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"""Return inventory of a past revision."""
344
# TODO: Unify this with get_inventory()
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# bzr 0.0.6 and later imposes the constraint that the inventory_id
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# must be the same as its revision, so this is trivial.
347
if revision_id is None:
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# This does not make sense: if there is no revision,
349
# then it is the current tree inventory surely ?!
350
# and thus get_root_id() is something that looks at the last
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# commit on the branch, and the get_root_id is an inventory check.
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raise NotImplementedError
353
# return Inventory(self.get_root_id())
354
else:
355
return self.get_inventory(revision_id)
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@needs_read_lock
358
def is_shared(self):
359
"""Return True if this repository is flagged as a shared repository."""
360
# FIXME format 4-6 cannot be shared, this is technically faulty.
361
return self.control_files._transport.has('shared-storage')
362
363
@needs_read_lock
364
def revision_tree(self, revision_id):
365
"""Return Tree for a revision on this branch.
366
367
`revision_id` may be None for the null revision, in which case
368
an `EmptyTree` is returned."""
369
# TODO: refactor this to use an existing revision object
370
# so we don't need to read it in twice.
371
if revision_id is None or revision_id == NULL_REVISION:
372
return EmptyTree()
373
else:
374
inv = self.get_revision_inventory(revision_id)
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return RevisionTree(self, inv, revision_id)
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@needs_read_lock
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def get_ancestry(self, revision_id):
379
"""Return a list of revision-ids integrated by a revision.
380
381
This is topologically sorted.
382
"""
383
if revision_id is None:
384
return [None]
385
if not self.has_revision(revision_id):
386
raise errors.NoSuchRevision(self, revision_id)
387
w = self.get_inventory_weave()
388
return [None] + map(w.idx_to_name,
389
w.inclusions([w.lookup(revision_id)]))
390
391
@needs_read_lock
392
def print_file(self, file, revision_id):
393
"""Print `file` to stdout.
394
395
FIXME RBC 20060125 as John Meinel points out this is a bad api
396
- it writes to stdout, it assumes that that is valid etc. Fix
397
by creating a new more flexible convenience function.
398
"""
399
tree = self.revision_tree(revision_id)
400
# use inventory as it was in that revision
401
file_id = tree.inventory.path2id(file)
402
if not file_id:
403
raise BzrError("%r is not present in revision %s" % (file, revno))
404
try:
405
revno = self.revision_id_to_revno(revision_id)
406
except errors.NoSuchRevision:
407
# TODO: This should not be BzrError,
408
# but NoSuchFile doesn't fit either
409
raise BzrError('%r is not present in revision %s'
410
% (file, revision_id))
411
else:
412
raise BzrError('%r is not present in revision %s'
413
% (file, revno))
414
tree.print_file(file_id)
415
416
def get_transaction(self):
417
return self.control_files.get_transaction()
418
419
@needs_write_lock
420
def set_make_working_trees(self, new_value):
421
"""Set the policy flag for making working trees when creating branches.
422
423
This only applies to branches that use this repository.
424
425
The default is 'True'.
426
:param new_value: True to restore the default, False to disable making
427
working trees.
428
"""
429
# FIXME: split out into a new class/strategy ?
430
if isinstance(self._format, (RepositoryFormat4,
431
RepositoryFormat5,
432
RepositoryFormat6)):
433
raise NotImplementedError(self.set_make_working_trees)
434
if new_value:
435
try:
436
self.control_files._transport.delete('no-working-trees')
437
except errors.NoSuchFile:
438
pass
439
else:
440
self.control_files.put_utf8('no-working-trees', '')
441
442
def make_working_trees(self):
443
"""Returns the policy for making working trees on new branches."""
444
# FIXME: split out into a new class/strategy ?
445
if isinstance(self._format, (RepositoryFormat4,
446
RepositoryFormat5,
447
RepositoryFormat6)):
448
return True
449
return not self.control_files._transport.has('no-working-trees')
450
451
@needs_write_lock
452
def sign_revision(self, revision_id, gpg_strategy):
453
plaintext = Testament.from_revision(self, revision_id).as_short_text()
454
self.store_revision_signature(gpg_strategy, plaintext, revision_id)
455
456
457
class AllInOneRepository(Repository):
458
"""Legacy support - the repository behaviour for all-in-one branches."""
459
460
def __init__(self, _format, a_bzrdir, revision_store):
461
# we reuse one control files instance.
462
dir_mode = a_bzrdir._control_files._dir_mode
463
file_mode = a_bzrdir._control_files._file_mode
464
465
def get_weave(name, prefixed=False):
466
if name:
467
name = safe_unicode(name)
468
else:
469
name = ''
470
relpath = a_bzrdir._control_files._escape(name)
471
weave_transport = a_bzrdir._control_files._transport.clone(relpath)
472
ws = WeaveStore(weave_transport, prefixed=prefixed,
473
dir_mode=dir_mode,
474
file_mode=file_mode)
475
if a_bzrdir._control_files._transport.should_cache():
476
ws.enable_cache = True
477
return ws
478
479
def get_store(name, compressed=True, prefixed=False):
480
# FIXME: This approach of assuming stores are all entirely compressed
481
# or entirely uncompressed is tidy, but breaks upgrade from
482
# some existing branches where there's a mixture; we probably
483
# still want the option to look for both.
484
relpath = a_bzrdir._control_files._escape(name)
485
store = TextStore(a_bzrdir._control_files._transport.clone(relpath),
486
prefixed=prefixed, compressed=compressed,
487
dir_mode=dir_mode,
488
file_mode=file_mode)
489
#if self._transport.should_cache():
490
# cache_path = os.path.join(self.cache_root, name)
491
# os.mkdir(cache_path)
492
# store = bzrlib.store.CachedStore(store, cache_path)
493
return store
494
495
# not broken out yet because the controlweaves|inventory_store
496
# and text_store | weave_store bits are still different.
497
if isinstance(_format, RepositoryFormat4):
498
self.inventory_store = get_store('inventory-store')
499
self.text_store = get_store('text-store')
500
elif isinstance(_format, RepositoryFormat5):
501
self.control_weaves = get_weave('')
502
self.weave_store = get_weave('weaves')
503
elif isinstance(_format, RepositoryFormat6):
504
self.control_weaves = get_weave('')
505
self.weave_store = get_weave('weaves', prefixed=True)
506
else:
507
raise errors.BzrError('unreachable code: unexpected repository'
508
' format.')
509
revision_store.register_suffix('sig')
510
super(AllInOneRepository, self).__init__(_format, a_bzrdir, a_bzrdir._control_files, revision_store)
511
512
513
class MetaDirRepository(Repository):
514
"""Repositories in the new meta-dir layout."""
515
516
def __init__(self, _format, a_bzrdir, control_files, revision_store):
517
super(MetaDirRepository, self).__init__(_format,
518
a_bzrdir,
519
control_files,
520
revision_store)
521
522
dir_mode = self.control_files._dir_mode
523
file_mode = self.control_files._file_mode
524
525
def get_weave(name, prefixed=False):
526
if name:
527
name = safe_unicode(name)
528
else:
529
name = ''
530
relpath = self.control_files._escape(name)
531
weave_transport = self.control_files._transport.clone(relpath)
532
ws = WeaveStore(weave_transport, prefixed=prefixed,
533
dir_mode=dir_mode,
534
file_mode=file_mode)
535
if self.control_files._transport.should_cache():
536
ws.enable_cache = True
537
return ws
538
539
if isinstance(self._format, RepositoryFormat7):
540
self.control_weaves = get_weave('')
541
self.weave_store = get_weave('weaves', prefixed=True)
542
elif isinstance(self._format, RepositoryFormatKnit1):
543
self.control_weaves = get_weave('')
544
self.weave_store = get_weave('knits', prefixed=True)
545
else:
546
raise errors.BzrError('unreachable code: unexpected repository'
547
' format.')
548
549
550
class RepositoryFormat(object):
551
"""A repository format.
552
553
Formats provide three things:
554
* An initialization routine to construct repository data on disk.
555
* a format string which is used when the BzrDir supports versioned
556
children.
557
* an open routine which returns a Repository instance.
558
559
Formats are placed in an dict by their format string for reference
560
during opening. These should be subclasses of RepositoryFormat
561
for consistency.
562
563
Once a format is deprecated, just deprecate the initialize and open
564
methods on the format class. Do not deprecate the object, as the
565
object will be created every system load.
566
567
Common instance attributes:
568
_matchingbzrdir - the bzrdir format that the repository format was
569
originally written to work with. This can be used if manually
570
constructing a bzrdir and repository, or more commonly for test suite
571
parameterisation.
572
"""
573
574
_default_format = None
575
"""The default format used for new repositories."""
576
577
_formats = {}
578
"""The known formats."""
579
580
@classmethod
581
def find_format(klass, a_bzrdir):
582
"""Return the format for the repository object in a_bzrdir."""
583
try:
584
transport = a_bzrdir.get_repository_transport(None)
585
format_string = transport.get("format").read()
586
return klass._formats[format_string]
587
except errors.NoSuchFile:
588
raise errors.NoRepositoryPresent(a_bzrdir)
589
except KeyError:
590
raise errors.UnknownFormatError(format_string)
591
592
@classmethod
593
def get_default_format(klass):
594
"""Return the current default format."""
595
return klass._default_format
596
597
def get_format_string(self):
598
"""Return the ASCII format string that identifies this format.
599
600
Note that in pre format ?? repositories the format string is
601
not permitted nor written to disk.
602
"""
603
raise NotImplementedError(self.get_format_string)
604
605
def _get_revision_store(self, repo_transport, control_files):
606
"""Return the revision store object for this a_bzrdir."""
607
raise NotImplementedError(self._get_revision_store)
608
609
def _get_rev_store(self,
610
transport,
611
control_files,
612
name,
613
compressed=True,
614
prefixed=False):
615
"""Common logic for getting a revision store for a repository.
616
617
see self._get_revision_store for the method to
618
get the store for a repository.
619
"""
620
if name:
621
name = safe_unicode(name)
622
else:
623
name = ''
624
dir_mode = control_files._dir_mode
625
file_mode = control_files._file_mode
626
revision_store =TextStore(transport.clone(name),
627
prefixed=prefixed,
628
compressed=compressed,
629
dir_mode=dir_mode,
630
file_mode=file_mode)
631
revision_store.register_suffix('sig')
632
return revision_store
633
634
def initialize(self, a_bzrdir, shared=False):
635
"""Initialize a repository of this format in a_bzrdir.
636
637
:param a_bzrdir: The bzrdir to put the new repository in it.
638
:param shared: The repository should be initialized as a sharable one.
639
640
This may raise UninitializableFormat if shared repository are not
641
compatible the a_bzrdir.
642
"""
643
644
def is_supported(self):
645
"""Is this format supported?
646
647
Supported formats must be initializable and openable.
648
Unsupported formats may not support initialization or committing or
649
some other features depending on the reason for not being supported.
650
"""
651
return True
652
653
def open(self, a_bzrdir, _found=False):
654
"""Return an instance of this format for the bzrdir a_bzrdir.
655
656
_found is a private parameter, do not use it.
657
"""
658
raise NotImplementedError(self.open)
659
660
@classmethod
661
def register_format(klass, format):
662
klass._formats[format.get_format_string()] = format
663
664
@classmethod
665
def set_default_format(klass, format):
666
klass._default_format = format
667
668
@classmethod
669
def unregister_format(klass, format):
670
assert klass._formats[format.get_format_string()] is format
671
del klass._formats[format.get_format_string()]
672
673
674
class PreSplitOutRepositoryFormat(RepositoryFormat):
675
"""Base class for the pre split out repository formats."""
676
677
def initialize(self, a_bzrdir, shared=False, _internal=False):
678
"""Create a weave repository.
679
680
TODO: when creating split out bzr branch formats, move this to a common
681
base for Format5, Format6. or something like that.
682
"""
683
from bzrlib.weavefile import write_weave_v5
684
from bzrlib.weave import Weave
685
686
if shared:
687
raise errors.IncompatibleFormat(self, a_bzrdir._format)
688
689
if not _internal:
690
# always initialized when the bzrdir is.
691
return self.open(a_bzrdir, _found=True)
692
693
# Create an empty weave
694
sio = StringIO()
695
bzrlib.weavefile.write_weave_v5(Weave(), sio)
696
empty_weave = sio.getvalue()
697
698
mutter('creating repository in %s.', a_bzrdir.transport.base)
699
dirs = ['revision-store', 'weaves']
700
lock_file = 'branch-lock'
701
files = [('inventory.weave', StringIO(empty_weave)),
702
]
703
704
# FIXME: RBC 20060125 dont peek under the covers
705
# NB: no need to escape relative paths that are url safe.
706
control_files = LockableFiles(a_bzrdir.transport, 'branch-lock')
707
control_files.lock_write()
708
control_files._transport.mkdir_multi(dirs,
709
mode=control_files._dir_mode)
710
try:
711
for file, content in files:
712
control_files.put(file, content)
713
finally:
714
control_files.unlock()
715
return self.open(a_bzrdir, _found=True)
716
717
def open(self, a_bzrdir, _found=False):
718
"""See RepositoryFormat.open()."""
719
if not _found:
720
# we are being called directly and must probe.
721
raise NotImplementedError
722
723
repo_transport = a_bzrdir.get_repository_transport(None)
724
control_files = a_bzrdir._control_files
725
revision_store = self._get_revision_store(repo_transport, control_files)
726
return AllInOneRepository(_format=self,
727
a_bzrdir=a_bzrdir,
728
revision_store=revision_store)
729
730
731
class RepositoryFormat4(PreSplitOutRepositoryFormat):
732
"""Bzr repository format 4.
733
734
This repository format has:
735
- flat stores
736
- TextStores for texts, inventories,revisions.
737
738
This format is deprecated: it indexes texts using a text id which is
739
removed in format 5; initializationa and write support for this format
740
has been removed.
741
"""
742
743
def __init__(self):
744
super(RepositoryFormat4, self).__init__()
745
self._matchingbzrdir = bzrlib.bzrdir.BzrDirFormat4()
746
747
def initialize(self, url, shared=False, _internal=False):
748
"""Format 4 branches cannot be created."""
749
raise errors.UninitializableFormat(self)
750
751
def is_supported(self):
752
"""Format 4 is not supported.
753
754
It is not supported because the model changed from 4 to 5 and the
755
conversion logic is expensive - so doing it on the fly was not
756
feasible.
757
"""
758
return False
759
760
def _get_revision_store(self, repo_transport, control_files):
761
"""See RepositoryFormat._get_revision_store()."""
762
return self._get_rev_store(repo_transport,
763
control_files,
764
'revision-store')
765
766
767
class RepositoryFormat5(PreSplitOutRepositoryFormat):
768
"""Bzr control format 5.
769
770
This repository format has:
771
- weaves for file texts and inventory
772
- flat stores
773
- TextStores for revisions and signatures.
774
"""
775
776
def __init__(self):
777
super(RepositoryFormat5, self).__init__()
778
self._matchingbzrdir = bzrlib.bzrdir.BzrDirFormat5()
779
780
def _get_revision_store(self, repo_transport, control_files):
781
"""See RepositoryFormat._get_revision_store()."""
782
"""Return the revision store object for this a_bzrdir."""
783
return self._get_rev_store(repo_transport,
784
control_files,
785
'revision-store',
786
compressed=False)
787
788
789
class RepositoryFormat6(PreSplitOutRepositoryFormat):
790
"""Bzr control format 6.
791
792
This repository format has:
793
- weaves for file texts and inventory
794
- hash subdirectory based stores.
795
- TextStores for revisions and signatures.
796
"""
797
798
def __init__(self):
799
super(RepositoryFormat6, self).__init__()
800
self._matchingbzrdir = bzrlib.bzrdir.BzrDirFormat6()
801
802
def _get_revision_store(self, repo_transport, control_files):
803
"""See RepositoryFormat._get_revision_store()."""
804
return self._get_rev_store(repo_transport,
805
control_files,
806
'revision-store',
807
compressed=False,
808
prefixed=True)
809
810
811
class MetaDirRepositoryFormat(RepositoryFormat):
812
"""Common base class for the new repositories using the metadir layour."""
813
814
def __init__(self):
815
super(MetaDirRepositoryFormat, self).__init__()
816
self._matchingbzrdir = bzrlib.bzrdir.BzrDirMetaFormat1()
817
818
def _create_control_files(self, a_bzrdir):
819
"""Create the required files and the initial control_files object."""
820
# FIXME: RBC 20060125 dont peek under the covers
821
# NB: no need to escape relative paths that are url safe.
822
lock_file = 'lock'
823
repository_transport = a_bzrdir.get_repository_transport(self)
824
repository_transport.put(lock_file, StringIO()) # TODO get the file mode from the bzrdir lock files., mode=file_mode)
825
control_files = LockableFiles(repository_transport, 'lock')
826
return control_files
827
828
def _get_revision_store(self, repo_transport, control_files):
829
"""See RepositoryFormat._get_revision_store()."""
830
return self._get_rev_store(repo_transport,
831
control_files,
832
'revision-store',
833
compressed=False,
834
prefixed=True,
835
)
836
837
def open(self, a_bzrdir, _found=False, _override_transport=None):
838
"""See RepositoryFormat.open().
839
840
:param _override_transport: INTERNAL USE ONLY. Allows opening the
841
repository at a slightly different url
842
than normal. I.e. during 'upgrade'.
843
"""
844
if not _found:
845
format = RepositoryFormat.find_format(a_bzrdir)
846
assert format.__class__ == self.__class__
847
if _override_transport is not None:
848
repo_transport = _override_transport
849
else:
850
repo_transport = a_bzrdir.get_repository_transport(None)
851
control_files = LockableFiles(repo_transport, 'lock')
852
revision_store = self._get_revision_store(repo_transport, control_files)
853
return MetaDirRepository(_format=self,
854
a_bzrdir=a_bzrdir,
855
control_files=control_files,
856
revision_store=revision_store)
857
858
def _upload_blank_content(self, a_bzrdir, dirs, files, utf8_files, shared):
859
"""Upload the initial blank content."""
860
control_files = self._create_control_files(a_bzrdir)
861
control_files.lock_write()
862
control_files._transport.mkdir_multi(dirs,
863
mode=control_files._dir_mode)
864
try:
865
for file, content in files:
866
control_files.put(file, content)
867
for file, content in utf8_files:
868
control_files.put_utf8(file, content)
869
if shared == True:
870
control_files.put_utf8('shared-storage', '')
871
finally:
872
control_files.unlock()
873
874
875
class RepositoryFormat7(MetaDirRepositoryFormat):
876
"""Bzr repository 7.
877
878
This repository format has:
879
- weaves for file texts and inventory
880
- hash subdirectory based stores.
881
- TextStores for revisions and signatures.
882
- a format marker of its own
883
- an optional 'shared-storage' flag
884
- an optional 'no-working-trees' flag
885
"""
886
887
def get_format_string(self):
888
"""See RepositoryFormat.get_format_string()."""
889
return "Bazaar-NG Repository format 7"
890
891
def initialize(self, a_bzrdir, shared=False):
892
"""Create a weave repository.
893
894
:param shared: If true the repository will be initialized as a shared
895
repository.
896
"""
897
from bzrlib.weavefile import write_weave_v5
898
from bzrlib.weave import Weave
899
900
# Create an empty weave
901
sio = StringIO()
902
bzrlib.weavefile.write_weave_v5(Weave(), sio)
903
empty_weave = sio.getvalue()
904
905
mutter('creating repository in %s.', a_bzrdir.transport.base)
906
dirs = ['revision-store', 'weaves']
907
files = [('inventory.weave', StringIO(empty_weave)),
908
]
909
utf8_files = [('format', self.get_format_string())]
910
911
self._upload_blank_content(a_bzrdir, dirs, files, utf8_files, shared)
912
return self.open(a_bzrdir=a_bzrdir, _found=True)
913
914
915
class RepositoryFormatKnit1(MetaDirRepositoryFormat):
916
"""Bzr repository knit format 1.
917
918
This repository format has:
919
- knits for file texts and inventory
920
- hash subdirectory based stores.
921
- knits for revisions and signatures
922
- TextStores for revisions and signatures.
923
- a format marker of its own
924
- an optional 'shared-storage' flag
925
- an optional 'no-working-trees' flag
926
"""
927
928
def get_format_string(self):
929
"""See RepositoryFormat.get_format_string()."""
930
return "Bazaar-NG Knit Repository Format 1"
931
932
def initialize(self, a_bzrdir, shared=False):
933
"""Create a knit format 1 repository.
934
935
:param shared: If true the repository will be initialized as a shared
936
repository.
937
XXX NOTE that this current uses a Weave for testing and will become
938
A Knit in due course.
939
"""
940
from bzrlib.weavefile import write_weave_v5
941
from bzrlib.weave import Weave
942
943
# Create an empty weave
944
sio = StringIO()
945
bzrlib.weavefile.write_weave_v5(Weave(), sio)
946
empty_weave = sio.getvalue()
947
948
mutter('creating repository in %s.', a_bzrdir.transport.base)
949
dirs = ['revision-store', 'knits']
950
files = [('inventory.weave', StringIO(empty_weave)),
951
]
952
utf8_files = [('format', self.get_format_string())]
953
954
self._upload_blank_content(a_bzrdir, dirs, files, utf8_files, shared)
955
return self.open(a_bzrdir=a_bzrdir, _found=True)
956
957
958
# formats which have no format string are not discoverable
959
# and not independently creatable, so are not registered.
960
_default_format = RepositoryFormat7()
961
RepositoryFormat.register_format(_default_format)
962
RepositoryFormat.register_format(RepositoryFormatKnit1())
963
RepositoryFormat.set_default_format(_default_format)
964
_legacy_formats = [RepositoryFormat4(),
965
RepositoryFormat5(),
966
RepositoryFormat6()]
967
968
969
class InterRepository(object):
970
"""This class represents operations taking place between two repositories.
971
972
Its instances have methods like copy_content and fetch, and contain
973
references to the source and target repositories these operations can be
974
carried out on.
975
976
Often we will provide convenience methods on 'repository' which carry out
977
operations with another repository - they will always forward to
978
InterRepository.get(other).method_name(parameters).
979
"""
980
# XXX: FIXME: FUTURE: robertc
981
# testing of these probably requires a factory in optimiser type, and
982
# then a test adapter to test each type thoroughly.
983
#
984
985
_optimisers = set()
986
"""The available optimised InterRepository types."""
987
988
def __init__(self, source, target):
989
"""Construct a default InterRepository instance. Please use 'get'.
990
991
Only subclasses of InterRepository should call
992
InterRepository.__init__ - clients should call InterRepository.get
993
instead which will create an optimised InterRepository if possible.
994
"""
995
self.source = source
996
self.target = target
997
998
@needs_write_lock
999
def copy_content(self, revision_id=None, basis=None):
1000
"""Make a complete copy of the content in self into destination.
1001
1002
This is a destructive operation! Do not use it on existing
1003
repositories.
1004
1005
:param revision_id: Only copy the content needed to construct
1006
revision_id and its parents.
1007
:param basis: Copy the needed data preferentially from basis.
1008
"""
1009
try:
1010
self.target.set_make_working_trees(self.source.make_working_trees())
1011
except NotImplementedError:
1012
pass
1013
# grab the basis available data
1014
if basis is not None:
1015
self.target.fetch(basis, revision_id=revision_id)
1016
# but dont both fetching if we have the needed data now.
1017
if (revision_id not in (None, NULL_REVISION) and
1018
self.target.has_revision(revision_id)):
1019
return
1020
self.target.fetch(self.source, revision_id=revision_id)
1021
1022
def _double_lock(self, lock_source, lock_target):
1023
"""Take out too locks, rolling back the first if the second throws."""
1024
lock_source()
1025
try:
1026
lock_target()
1027
except Exception:
1028
# we want to ensure that we don't leave source locked by mistake.
1029
# and any error on target should not confuse source.
1030
self.source.unlock()
1031
raise
1032
1033
@needs_write_lock
1034
def fetch(self, revision_id=None, pb=None):
1035
"""Fetch the content required to construct revision_id.
1036
1037
The content is copied from source to target.
1038
1039
:param revision_id: if None all content is copied, if NULL_REVISION no
1040
content is copied.
1041
:param pb: optional progress bar to use for progress reports. If not
1042
provided a default one will be created.
1043
1044
Returns the copied revision count and the failed revisions in a tuple:
1045
(copied, failures).
1046
"""
1047
from bzrlib.fetch import RepoFetcher
1048
mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
1049
self.source, self.source._format, self.target, self.target._format)
1050
f = RepoFetcher(to_repository=self.target,
1051
from_repository=self.source,
1052
last_revision=revision_id,
1053
pb=pb)
1054
return f.count_copied, f.failed_revisions
1055
1056
@classmethod
1057
def get(klass, repository_source, repository_target):
1058
"""Retrieve a InterRepository worker object for these repositories.
1059
1060
:param repository_source: the repository to be the 'source' member of
1061
the InterRepository instance.
1062
:param repository_target: the repository to be the 'target' member of
1063
the InterRepository instance.
1064
If an optimised InterRepository worker exists it will be used otherwise
1065
a default InterRepository instance will be created.
1066
"""
1067
for provider in klass._optimisers:
1068
if provider.is_compatible(repository_source, repository_target):
1069
return provider(repository_source, repository_target)
1070
return InterRepository(repository_source, repository_target)
1071
1072
def lock_read(self):
1073
"""Take out a logical read lock.
1074
1075
This will lock the source branch and the target branch. The source gets
1076
a read lock and the target a read lock.
1077
"""
1078
self._double_lock(self.source.lock_read, self.target.lock_read)
1079
1080
def lock_write(self):
1081
"""Take out a logical write lock.
1082
1083
This will lock the source branch and the target branch. The source gets
1084
a read lock and the target a write lock.
1085
"""
1086
self._double_lock(self.source.lock_read, self.target.lock_write)
1087
1088
@needs_read_lock
1089
def missing_revision_ids(self, revision_id=None):
1090
"""Return the revision ids that source has that target does not.
1091
1092
These are returned in topological order.
1093
1094
:param revision_id: only return revision ids included by this
1095
revision_id.
1096
"""
1097
# generic, possibly worst case, slow code path.
1098
target_ids = set(self.target.all_revision_ids())
1099
if revision_id is not None:
1100
source_ids = self.source.get_ancestry(revision_id)
1101
assert source_ids.pop(0) == None
1102
else:
1103
source_ids = self.source.all_revision_ids()
1104
result_set = set(source_ids).difference(target_ids)
1105
# this may look like a no-op: its not. It preserves the ordering
1106
# other_ids had while only returning the members from other_ids
1107
# that we've decided we need.
1108
return [rev_id for rev_id in source_ids if rev_id in result_set]
1109
1110
@classmethod
1111
def register_optimiser(klass, optimiser):
1112
"""Register an InterRepository optimiser."""
1113
klass._optimisers.add(optimiser)
1114
1115
def unlock(self):
1116
"""Release the locks on source and target."""
1117
try:
1118
self.target.unlock()
1119
finally:
1120
self.source.unlock()
1121
1122
@classmethod
1123
def unregister_optimiser(klass, optimiser):
1124
"""Unregister an InterRepository optimiser."""
1125
klass._optimisers.remove(optimiser)
1126
1127
1128
class InterWeaveRepo(InterRepository):
1129
"""Optimised code paths between Weave based repositories."""
1130
1131
_matching_repo_format = _default_format
1132
"""Repository format for testing with."""
1133
1134
@staticmethod
1135
def is_compatible(source, target):
1136
"""Be compatible with known Weave formats.
1137
1138
We dont test for the stores being of specific types becase that
1139
could lead to confusing results, and there is no need to be
1140
overly general.
1141
"""
1142
try:
1143
return (isinstance(source._format, (RepositoryFormat5,
1144
RepositoryFormat6,
1145
RepositoryFormat7)) and
1146
isinstance(target._format, (RepositoryFormat5,
1147
RepositoryFormat6,
1148
RepositoryFormat7)))
1149
except AttributeError:
1150
return False
1151
1152
@needs_write_lock
1153
def copy_content(self, revision_id=None, basis=None):
1154
"""See InterRepository.copy_content()."""
1155
# weave specific optimised path:
1156
if basis is not None:
1157
# copy the basis in, then fetch remaining data.
1158
basis.copy_content_into(self.target, revision_id)
1159
# the basis copy_content_into could misset this.
1160
try:
1161
self.target.set_make_working_trees(self.source.make_working_trees())
1162
except NotImplementedError:
1163
pass
1164
self.target.fetch(self.source, revision_id=revision_id)
1165
else:
1166
try:
1167
self.target.set_make_working_trees(self.source.make_working_trees())
1168
except NotImplementedError:
1169
pass
1170
# FIXME do not peek!
1171
if self.source.control_files._transport.listable():
1172
pb = bzrlib.ui.ui_factory.progress_bar()
1173
copy_all(self.source.weave_store,
1174
self.target.weave_store, pb=pb)
1175
pb.update('copying inventory', 0, 1)
1176
self.target.control_weaves.copy_multi(
1177
self.source.control_weaves, ['inventory'])
1178
copy_all(self.source.revision_store,
1179
self.target.revision_store, pb=pb)
1180
else:
1181
self.target.fetch(self.source, revision_id=revision_id)
1182
1183
@needs_write_lock
1184
def fetch(self, revision_id=None, pb=None):
1185
"""See InterRepository.fetch()."""
1186
from bzrlib.fetch import RepoFetcher
1187
mutter("Using fetch logic to copy between %s(%s) and %s(%s)",
1188
self.source, self.source._format, self.target, self.target._format)
1189
f = RepoFetcher(to_repository=self.target,
1190
from_repository=self.source,
1191
last_revision=revision_id,
1192
pb=pb)
1193
return f.count_copied, f.failed_revisions
1194
1195
@needs_read_lock
1196
def missing_revision_ids(self, revision_id=None):
1197
"""See InterRepository.missing_revision_ids()."""
1198
# we want all revisions to satisfy revision_id in source.
1199
# but we dont want to stat every file here and there.
1200
# we want then, all revisions other needs to satisfy revision_id
1201
# checked, but not those that we have locally.
1202
# so the first thing is to get a subset of the revisions to
1203
# satisfy revision_id in source, and then eliminate those that
1204
# we do already have.
1205
# this is slow on high latency connection to self, but as as this
1206
# disk format scales terribly for push anyway due to rewriting
1207
# inventory.weave, this is considered acceptable.
1208
# - RBC 20060209
1209
if revision_id is not None:
1210
source_ids = self.source.get_ancestry(revision_id)
1211
assert source_ids.pop(0) == None
1212
else:
1213
source_ids = self.source._all_possible_ids()
1214
source_ids_set = set(source_ids)
1215
# source_ids is the worst possible case we may need to pull.
1216
# now we want to filter source_ids against what we actually
1217
# have in target, but dont try to check for existence where we know
1218
# we do not have a revision as that would be pointless.
1219
target_ids = set(self.target._all_possible_ids())
1220
possibly_present_revisions = target_ids.intersection(source_ids_set)
1221
actually_present_revisions = set(self.target._eliminate_revisions_not_present(possibly_present_revisions))
1222
required_revisions = source_ids_set.difference(actually_present_revisions)
1223
required_topo_revisions = [rev_id for rev_id in source_ids if rev_id in required_revisions]
1224
if revision_id is not None:
1225
# we used get_ancestry to determine source_ids then we are assured all
1226
# revisions referenced are present as they are installed in topological order.
1227
# and the tip revision was validated by get_ancestry.
1228
return required_topo_revisions
1229
else:
1230
# if we just grabbed the possibly available ids, then
1231
# we only have an estimate of whats available and need to validate
1232
# that against the revision records.
1233
return self.source._eliminate_revisions_not_present(required_topo_revisions)
1234
1235
1236
InterRepository.register_optimiser(InterWeaveRepo)
1237
1238
1239
class RepositoryTestProviderAdapter(object):
1240
"""A tool to generate a suite testing multiple repository formats at once.
1241
1242
This is done by copying the test once for each transport and injecting
1243
the transport_server, transport_readonly_server, and bzrdir_format and
1244
repository_format classes into each copy. Each copy is also given a new id()
1245
to make it easy to identify.
1246
"""
1247
1248
def __init__(self, transport_server, transport_readonly_server, formats):
1249
self._transport_server = transport_server
1250
self._transport_readonly_server = transport_readonly_server
1251
self._formats = formats
1252
1253
def adapt(self, test):
1254
result = TestSuite()
1255
for repository_format, bzrdir_format in self._formats:
1256
new_test = deepcopy(test)
1257
new_test.transport_server = self._transport_server
1258
new_test.transport_readonly_server = self._transport_readonly_server
1259
new_test.bzrdir_format = bzrdir_format
1260
new_test.repository_format = repository_format
1261
def make_new_test_id():
1262
new_id = "%s(%s)" % (new_test.id(), repository_format.__class__.__name__)
1263
return lambda: new_id
1264
new_test.id = make_new_test_id()
1265
result.addTest(new_test)
1266
return result
1267
1268
1269
class InterRepositoryTestProviderAdapter(object):
1270
"""A tool to generate a suite testing multiple inter repository formats.
1271
1272
This is done by copying the test once for each interrepo provider and injecting
1273
the transport_server, transport_readonly_server, repository_format and
1274
repository_to_format classes into each copy.
1275
Each copy is also given a new id() to make it easy to identify.
1276
"""
1277
1278
def __init__(self, transport_server, transport_readonly_server, formats):
1279
self._transport_server = transport_server
1280
self._transport_readonly_server = transport_readonly_server
1281
self._formats = formats
1282
1283
def adapt(self, test):
1284
result = TestSuite()
1285
for interrepo_class, repository_format, repository_format_to in self._formats:
1286
new_test = deepcopy(test)
1287
new_test.transport_server = self._transport_server
1288
new_test.transport_readonly_server = self._transport_readonly_server
1289
new_test.interrepo_class = interrepo_class
1290
new_test.repository_format = repository_format
1291
new_test.repository_format_to = repository_format_to
1292
def make_new_test_id():
1293
new_id = "%s(%s)" % (new_test.id(), interrepo_class.__name__)
1294
return lambda: new_id
1295
new_test.id = make_new_test_id()
1296
result.addTest(new_test)
1297
return result
1298
1299
@staticmethod
1300
def default_test_list():
1301
"""Generate the default list of interrepo permutations to test."""
1302
result = []
1303
# test the default InterRepository between format 6 and the current
1304
# default format.
1305
# XXX: robertc 20060220 reinstate this when there are two supported
1306
# formats which do not have an optimal code path between them.
1307
result.append((InterRepository,
1308
RepositoryFormat6(),
1309
RepositoryFormatKnit1()))
1310
for optimiser in InterRepository._optimisers:
1311
result.append((optimiser,
1312
optimiser._matching_repo_format,
1313
optimiser._matching_repo_format
1314
))
1315
# if there are specific combinations we want to use, we can add them
1316
# here.
1317
return result
1318
1319
1320
class CopyConverter(object):
1321
"""A repository conversion tool which just performs a copy of the content.
1322
1323
This is slow but quite reliable.
1324
"""
1325
1326
def __init__(self, target_format):
1327
"""Create a CopyConverter.
1328
1329
:param target_format: The format the resulting repository should be.
1330
"""
1331
self.target_format = target_format
1332
1333
def convert(self, repo, pb):
1334
"""Perform the conversion of to_convert, giving feedback via pb.
1335
1336
:param to_convert: The disk object to convert.
1337
:param pb: a progress bar to use for progress information.
1338
"""
1339
self.pb = pb
1340
self.count = 0
1341
self.total = 3
1342
# this is only useful with metadir layouts - separated repo content.
1343
# trigger an assertion if not such
1344
repo._format.get_format_string()
1345
self.repo_dir = repo.bzrdir
1346
self.step('Moving repository to repository.backup')
1347
self.repo_dir.transport.move('repository', 'repository.backup')
1348
backup_transport = self.repo_dir.transport.clone('repository.backup')
1349
self.source_repo = repo._format.open(self.repo_dir,
1350
_found=True,
1351
_override_transport=backup_transport)
1352
self.step('Creating new repository')
1353
converted = self.target_format.initialize(self.repo_dir,
1354
self.source_repo.is_shared())
1355
converted.lock_write()
1356
try:
1357
self.step('Copying content into repository.')
1358
self.source_repo.copy_content_into(converted)
1359
finally:
1360
converted.unlock()
1361
self.step('Deleting old repository content.')
1362
self.repo_dir.transport.delete_tree('repository.backup')
1363
self.pb.note('repository converted')
1364
1365
def step(self, message):
1366
"""Update the pb by a step."""
1367
self.count +=1
1368
self.pb.update(message, self.count, self.total)
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