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# Copyright (C) 2005, 2006 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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# TODO: Check ancestries are correct for every revision: includes
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# every committed so far, and in a reasonable order.
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# TODO: Also check non-mainline revisions mentioned as parents.
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# TODO: Check for extra files in the control directory.
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# TODO: Check revision, inventory and entry objects have all
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# TODO: Get every revision in the revision-store even if they're not
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# referenced by history and make sure they're all valid.
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# TODO: Perhaps have a way to record errors other than by raising exceptions;
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# would perhaps be enough to accumulate exception objects in a list without
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# raising them. If there's more than one exception it'd be good to see them
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"""Checking of bzr objects.
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check_refs is a concept used for optimising check. Objects that depend on other
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objects (e.g. tree on repository) can list the objects they would be requesting
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so that when the dependent object is checked, matches can be pulled out and
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evaluated in-line rather than re-reading the same data many times.
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check_refs are tuples (kind, value). Currently defined kinds are:
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* 'trees', where value is a revid and the looked up objects are revision trees.
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* 'lefthand-distance', where value is a revid and the looked up objects are the
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distance along the lefthand path to NULL for that revid.
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* 'revision-existence', where value is a revid, and the result is True or False
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indicating that the revision was found/not found.
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from bzrlib.branch import Branch
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from bzrlib.bzrdir import BzrDir
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from bzrlib.revision import NULL_REVISION
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from bzrlib.trace import note
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from bzrlib.workingtree import WorkingTree
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from bzrlib.i18n import gettext
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"""Check a repository"""
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def __init__(self, repository, check_repo=True):
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self.repository = repository
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def report_results(self, verbose):
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raise NotImplementedError(self.report_results)
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class VersionedFileCheck(Check):
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"""Check a versioned file repository"""
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# The Check object interacts with InventoryEntry.check, etc.
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def __init__(self, repository, check_repo=True):
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self.repository = repository
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self.checked_rev_cnt = 0
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self.missing_parent_links = {}
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self.missing_inventory_sha_cnt = 0
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self.missing_revision_cnt = 0
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self.checked_weaves = set()
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self.unreferenced_versions = set()
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self.inconsistent_parents = []
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self.rich_roots = repository.supports_rich_root()
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self.text_key_references = {}
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self.check_repo = check_repo
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self.other_results = []
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# Plain text lines to include in the report
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self._report_items = []
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# Keys we are looking for; may be large and need spilling to disk.
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# key->(type(revision/inventory/text/signature/map), sha1, first-referer)
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self.pending_keys = {}
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# Ancestors map for all of revisions being checked; while large helper
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# functions we call would create it anyway, so better to have once and
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def check(self, callback_refs=None, check_repo=True):
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if callback_refs is None:
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self.repository.lock_read()
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self.progress = ui.ui_factory.nested_progress_bar()
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self.progress.update(gettext('check'), 0, 4)
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self.progress.update(gettext('checking revisions'), 0)
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self.check_revisions()
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self.progress.update(gettext('checking commit contents'), 1)
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self.repository._check_inventories(self)
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self.progress.update(gettext('checking file graphs'), 2)
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# check_weaves is done after the revision scan so that
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# revision index is known to be valid.
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self.progress.update(gettext('checking branches and trees'), 3)
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repo = self.repository
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# calculate all refs, and callback the objects requesting them.
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wanting_items = set()
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# Current crude version calculates everything and calls
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# everything at once. Doing a queue and popping as things are
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# satisfied would be cheaper on memory [but few people have
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# huge numbers of working trees today. TODO: fix before
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for ref, wantlist in callback_refs.iteritems():
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wanting_items.update(wantlist)
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refs[ref] = repo.revision_tree(value)
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elif kind == 'lefthand-distance':
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elif kind == 'revision-existence':
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existences.add(value)
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raise AssertionError(
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'unknown ref kind for ref %s' % ref)
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node_distances = repo.get_graph().find_lefthand_distances(distances)
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for key, distance in node_distances.iteritems():
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refs[('lefthand-distance', key)] = distance
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if key in existences and distance > 0:
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refs[('revision-existence', key)] = True
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existences.remove(key)
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parent_map = repo.get_graph().get_parent_map(existences)
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for key in parent_map:
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refs[('revision-existence', key)] = True
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existences.remove(key)
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for key in existences:
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refs[('revision-existence', key)] = False
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for item in wanting_items:
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if isinstance(item, WorkingTree):
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if isinstance(item, Branch):
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self.other_results.append(item.check(refs))
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self.progress.finished()
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self.repository.unlock()
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def _check_revisions(self, revisions_iterator):
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"""Check revision objects by decorating a generator.
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:param revisions_iterator: An iterator of(revid, Revision-or-None).
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:return: A generator of the contents of revisions_iterator.
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self.planned_revisions = set()
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for revid, revision in revisions_iterator:
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yield revid, revision
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self._check_one_rev(revid, revision)
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# Flatten the revisions we found to guarantee consistent later
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self.planned_revisions = list(self.planned_revisions)
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# TODO: extract digital signatures as items to callback on too.
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def check_revisions(self):
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"""Scan revisions, checking data directly available as we go."""
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revision_iterator = self.repository._iter_revisions(None)
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revision_iterator = self._check_revisions(revision_iterator)
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# We read the all revisions here:
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# - doing this allows later code to depend on the revision index.
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# - we can fill out existence flags at this point
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# - we can read the revision inventory sha at this point
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# - we can check properties and serialisers etc.
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if not self.repository._format.revision_graph_can_have_wrong_parents:
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# The check against the index isn't needed.
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self.revs_with_bad_parents_in_index = None
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for thing in revision_iterator:
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bad_revisions = self.repository._find_inconsistent_revision_parents(
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self.revs_with_bad_parents_in_index = list(bad_revisions)
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def report_results(self, verbose):
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self._report_repo_results(verbose)
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for result in self.other_results:
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result.report_results(verbose)
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def _report_repo_results(self, verbose):
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note(gettext('checked repository {0} format {1}').format(
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self.repository.user_url,
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self.repository._format))
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note(gettext('%6d revisions'), self.checked_rev_cnt)
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note(gettext('%6d file-ids'), len(self.checked_weaves))
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note(gettext('%6d unreferenced text versions'),
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len(self.unreferenced_versions))
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if verbose and len(self.unreferenced_versions):
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for file_id, revision_id in self.unreferenced_versions:
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note(gettext('unreferenced version: {{{0}}} in {1}').format(revision_id,
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if self.missing_inventory_sha_cnt:
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note(gettext('%6d revisions are missing inventory_sha1'),
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self.missing_inventory_sha_cnt)
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if self.missing_revision_cnt:
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note(gettext('%6d revisions are mentioned but not present'),
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self.missing_revision_cnt)
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note(gettext('%6d ghost revisions'), len(self.ghosts))
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for ghost in self.ghosts:
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if len(self.missing_parent_links):
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note(gettext('%6d revisions missing parents in ancestry'),
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len(self.missing_parent_links))
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for link, linkers in self.missing_parent_links.items():
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note(gettext(' %s should be in the ancestry for:'), link)
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for linker in linkers:
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note(' * %s', linker)
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if len(self.inconsistent_parents):
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note(gettext('%6d inconsistent parents'), len(self.inconsistent_parents))
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for info in self.inconsistent_parents:
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revision_id, file_id, found_parents, correct_parents = info
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note(gettext(' * {0} version {1} has parents {2!r} '
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'but should have {3!r}').format(
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file_id, revision_id, found_parents,
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if self.revs_with_bad_parents_in_index:
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'%6d revisions have incorrect parents in the revision index'),
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len(self.revs_with_bad_parents_in_index))
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for item in self.revs_with_bad_parents_in_index:
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revision_id, index_parents, actual_parents = item
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' {0} has wrong parents in index: '
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'{1!r} should be {2!r}').format(
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revision_id, index_parents, actual_parents))
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for item in self._report_items:
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def _check_one_rev(self, rev_id, rev):
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"""Cross-check one revision.
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:param rev_id: A revision id to check.
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:param rev: A revision or None to indicate a missing revision.
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if rev.revision_id != rev_id:
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self._report_items.append(gettext(
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'Mismatched internal revid {{{0}}} and index revid {{{1}}}').format(
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rev.revision_id, rev_id))
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rev_id = rev.revision_id
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# Check this revision tree etc, and count as seen when we encounter a
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self.planned_revisions.add(rev_id)
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self.ghosts.discard(rev_id)
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# Count all parents as ghosts if we haven't seen them yet.
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for parent in rev.parent_ids:
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if not parent in self.planned_revisions:
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self.ghosts.add(parent)
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self.ancestors[rev_id] = tuple(rev.parent_ids) or (NULL_REVISION,)
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self.add_pending_item(rev_id, ('inventories', rev_id), 'inventory',
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self.checked_rev_cnt += 1
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def add_pending_item(self, referer, key, kind, sha1):
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"""Add a reference to a sha1 to be cross checked against a key.
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:param referer: The referer that expects key to have sha1.
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:param key: A storage key e.g. ('texts', 'foo@bar-20040504-1234')
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:param kind: revision/inventory/text/map/signature
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:param sha1: A hex sha1 or None if no sha1 is known.
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existing = self.pending_keys.get(key)
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if sha1 != existing[1]:
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self._report_items.append(gettext('Multiple expected sha1s for {0}. {{{1}}}'
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' expects {{{2}}}, {{{3}}} expects {{{4}}}').format(
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key, referer, sha1, existing[1], existing[0]))
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self.pending_keys[key] = (kind, sha1, referer)
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def check_weaves(self):
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"""Check all the weaves we can get our hands on.
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storebar = ui.ui_factory.nested_progress_bar()
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self._check_weaves(storebar)
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def _check_weaves(self, storebar):
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storebar.update('text-index', 0, 2)
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if self.repository._format.fast_deltas:
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# We haven't considered every fileid instance so far.
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weave_checker = self.repository._get_versioned_file_checker(
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ancestors=self.ancestors)
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weave_checker = self.repository._get_versioned_file_checker(
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text_key_references=self.text_key_references,
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ancestors=self.ancestors)
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storebar.update('file-graph', 1)
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result = weave_checker.check_file_version_parents(
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self.repository.texts)
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self.checked_weaves = weave_checker.file_ids
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bad_parents, unused_versions = result
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bad_parents = bad_parents.items()
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for text_key, (stored_parents, correct_parents) in bad_parents:
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# XXX not ready for id join/split operations.
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weave_id = text_key[0]
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revision_id = text_key[-1]
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weave_parents = tuple([parent[-1] for parent in stored_parents])
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correct_parents = tuple([parent[-1] for parent in correct_parents])
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self.inconsistent_parents.append(
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(revision_id, weave_id, weave_parents, correct_parents))
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self.unreferenced_versions.update(unused_versions)
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def _add_entry_to_text_key_references(self, inv, entry):
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if not self.rich_roots and entry.name == '':
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key = (entry.file_id, entry.revision)
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self.text_key_references.setdefault(key, False)
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if entry.revision == inv.revision_id:
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self.text_key_references[key] = True
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def scan_branch(branch, needed_refs, to_unlock):
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"""Scan a branch for refs.
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:param branch: The branch to schedule for checking.
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:param needed_refs: Refs we are accumulating.
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:param to_unlock: The unlock list accumulating.
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note(gettext("Checking branch at '%s'.") % (branch.base,))
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to_unlock.append(branch)
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branch_refs = branch._get_check_refs()
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for ref in branch_refs:
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reflist = needed_refs.setdefault(ref, [])
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reflist.append(branch)
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def scan_tree(base_tree, tree, needed_refs, to_unlock):
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"""Scan a tree for refs.
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:param base_tree: The original tree check opened, used to detect duplicate
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:param tree: The tree to schedule for checking.
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:param needed_refs: Refs we are accumulating.
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:param to_unlock: The unlock list accumulating.
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if base_tree is not None and tree.basedir == base_tree.basedir:
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note(gettext("Checking working tree at '%s'.") % (tree.basedir,))
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to_unlock.append(tree)
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tree_refs = tree._get_check_refs()
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for ref in tree_refs:
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reflist = needed_refs.setdefault(ref, [])
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def check_dwim(path, verbose, do_branch=False, do_repo=False, do_tree=False):
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"""Check multiple objects.
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If errors occur they are accumulated and reported as far as possible, and
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an exception raised at the end of the process.
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base_tree, branch, repo, relpath = \
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BzrDir.open_containing_tree_branch_or_repository(path)
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except errors.NotBranchError:
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base_tree = branch = repo = None
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if base_tree is not None:
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# If the tree is a lightweight checkout we won't see it in
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# repo.find_branches - add now.
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scan_tree(None, base_tree, needed_refs, to_unlock)
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branch = base_tree.branch
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if branch is not None:
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# The branch is in a shared repository
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repo = branch.repository
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to_unlock.append(repo)
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branches = repo.find_branches(using=True)
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if do_branch or do_tree:
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for branch in branches:
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tree = branch.bzrdir.open_workingtree()
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except (errors.NotLocalUrl, errors.NoWorkingTree):
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scan_tree(base_tree, tree, needed_refs, to_unlock)
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scan_branch(branch, needed_refs, to_unlock)
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if do_branch and not branches:
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note(gettext("No branch found at specified location."))
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if do_tree and base_tree is None and not saw_tree:
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note(gettext("No working tree found at specified location."))
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if do_repo or do_branch or do_tree:
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note(gettext("Checking repository at '%s'.")
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result = repo.check(None, callback_refs=needed_refs,
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result.report_results(verbose)
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note(gettext("No working tree found at specified location."))
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note(gettext("No branch found at specified location."))
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note(gettext("No repository found at specified location."))
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for thing in to_unlock:
added
removed
bzrlib/check.py
