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  • Committer: Robert Collins
  • Date: 2008-01-11 03:54:51 UTC
  • mto: (3172.5.3 remote.graph)
  • mto: This revision was merged to the branch mainline in revision 3176.
  • Revision ID: robertc@robertcollins.net-20080111035451-52at4031ohbmtoh2
Repository has a new method ``has_revisions`` which signals the presence
of many revisions by returning a set of the revisions listed which are
present. This can be done by index queries without reading data for parent
revision names etc. (Robert Collins)

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Lines of Context:
bzrlib/repository.py
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    @needs_read_lock
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    def has_revision(self, revision_id):
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        """True if this repository has a copy of the revision."""
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        if 'evil' in debug.debug_flags:
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            mutter_callsite(3, "has_revision is a LBYL symptom.")
 
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        return revision_id in self.has_revisions((revision_id,))
 
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    def has_revisions(self, revision_ids):
 
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        """Probe to find out the presence of multiple revisions.
 
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        :param revision_ids: An iterable of revision_ids.
 
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        :return: A set of the revision_ids that were present.
 
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        """
 
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        raise NotImplementedError(self.has_revisions)
 
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        return self._revision_store.has_revision_id(revision_id,
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                                                    self.get_transaction())
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            graph = self.source.get_graph()
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            missing_revs = set()
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            searcher = graph._make_breadth_first_searcher([revision_id])
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            target_index = \
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                self.target._pack_collection.revision_index.combined_index
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            null_set = frozenset([_mod_revision.NULL_REVISION])
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            while True:
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                try:
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                except StopIteration:
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                    break
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                next_revs.difference_update(null_set)
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                target_keys = [(key,) for key in next_revs]
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                have_revs = frozenset(node[1][0] for node in
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                    target_index.iter_entries(target_keys))
 
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                have_revs = self.target.has_revisions(next_revs)
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                missing_revs.update(next_revs - have_revs)
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                searcher.stop_searching_any(have_revs)
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            if next_revs - have_revs == set([revision_id]):