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# Copyright (C) 2006 by 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 version 2 as published by
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# the Free Software Foundation.
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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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"""VersionedFile based revision store.
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This stores revisions as individual entries in a knit, and signatures in a
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import bzrlib.errors as errors
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from bzrlib.knit import KnitVersionedFile
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from bzrlib.store.revision import RevisionStore
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from bzrlib.store.versioned import VersionedFileStore
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from bzrlib.transport import get_transport
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class KnitRevisionStoreFactory(object):
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"""Factory to create a KnitRevisionStore for testing."""
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def create(self, url):
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"""Create a revision store at url."""
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t = get_transport(url)
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t.mkdir('revision-store')
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versioned_file_store = VersionedFileStore(
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t.clone('revision-store'),
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versionedfile_class=KnitVersionedFile)
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return KnitRevisionStore(versioned_file_store)
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return "KnitRevisionStore"
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class KnitRevisionStore(RevisionStore):
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"""A RevisionStore layering on a VersionedFileStore."""
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def __init__(self, versioned_file_store):
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"""Create a KnitRevisionStore object.
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:param versioned_file_store: the text store to use for storing
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revisions and signatures.
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super(KnitRevisionStore, self).__init__()
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self.versioned_file_store = versioned_file_store
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def _add_revision(self, revision, revision_as_file, transaction):
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"""Template method helper to store revision in this store."""
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# FIXME: make this ghost aware at the knit level
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rf = self.get_revision_file(transaction)
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for parent_id in revision.parent_ids:
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if rf.has_version(parent_id):
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parents.append(parent_id)
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self.get_revision_file(transaction).add_lines(
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revision_as_file.readlines())
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def add_revision_signature_text(self, revision_id, signature_text, transaction):
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"""See RevisionStore.add_revision_signature_text()."""
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self.get_signature_file(transaction).add_lines(
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revision_id, [], bzrlib.osutils.split_lines(signature_text))
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def all_revision_ids(self, transaction):
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"""See RevisionStore.all_revision_ids()."""
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rev_file = self.get_revision_file(transaction)
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return rev_file.get_ancestry(rev_file.versions())
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def get_revision(self, revision_id, transaction):
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"""See RevisionStore.get_revision()."""
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xml = self._get_revision_xml(revision_id, transaction)
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r = self._serializer.read_revision_from_string(xml)
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except SyntaxError, e:
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raise errors.BzrError('failed to unpack revision_xml',
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assert r.revision_id == revision_id
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def _get_revision_xml(self, revision_id, transaction):
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return self.get_revision_file(transaction).get_text(revision_id)
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except (errors.RevisionNotPresent):
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raise errors.NoSuchRevision(self, revision_id)
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def get_revision_file(self, transaction):
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"""Get the revision versioned file object."""
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return self.versioned_file_store.get_weave_or_empty('revisions', transaction)
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def get_signature_file(self, transaction):
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"""Get the signature text versioned file object."""
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return self.versioned_file_store.get_weave_or_empty('signatures', transaction)
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def _get_signature_text(self, revision_id, transaction):
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"""See RevisionStore._get_signature_text()."""
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return self.get_signature_file(transaction).get_text(revision_id)
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except errors.RevisionNotPresent:
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raise errors.NoSuchRevision(self, revision_id)
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def has_revision_id(self, revision_id, transaction):
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"""True if the store contains revision_id."""
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return (revision_id is None
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or self.get_revision_file(transaction).has_version(revision_id))
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def _has_signature(self, revision_id, transaction):
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"""See RevisionStore._has_signature()."""
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return self.get_signature_file(transaction).has_version(revision_id)
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def total_size(self, transaction):
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""" See RevisionStore.total_size()."""
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return self.versioned_file_store.total_size()
added
removed
bzrlib/store/revision/knit.py
