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bzrlib/repository.py
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        # revisions. We don't need to see all lines in the inventory because
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        # only those added in an inventory in rev X can contain a revision=X
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        # line.
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        for line in w.iter_lines_added_or_present_in_versions(selected_revision_ids):
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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 = _unescape_xml(line[start:end])
 
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        pb = ui.ui_factory.nested_progress_bar()
 
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        try:
 
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            for line in w.iter_lines_added_or_present_in_versions(
 
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                selected_revision_ids, pb=pb):
 
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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 = _unescape_xml(line[start:end])
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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 = _unescape_xml(line[start:end])
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            if revision_id in selected_revision_ids:
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                result.setdefault(file_id, set()).add(revision_id)
 
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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 = _unescape_xml(line[start:end])
 
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                if revision_id in selected_revision_ids:
 
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                    result.setdefault(file_id, set()).add(revision_id)
 
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        finally:
 
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            pb.finished()
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        return result
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    @needs_read_lock
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            self.new_inventory, self._config)
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        return self._new_revision_id
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    def revision_tree(self):
 
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        """Return the tree that was just committed.
 
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        After calling commit() this can be called to get a RevisionTree
 
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        representing the newly committed tree. This is preferred to
 
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        calling Repository.revision_tree() because that may require
 
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        deserializing the inventory, while we already have a copy in
 
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        memory.
 
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        """
 
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        return RevisionTree(self.repository, self.new_inventory,
 
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                            self._new_revision_id)
 
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    def finish_inventory(self):
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        """Tell the builder that the inventory is finished."""
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        if self.new_inventory.root is None:
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        # In this revision format, root entries have no knit or weave
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        if ie is self.new_inventory.root:
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            if len(parent_invs) > 0 and parent_invs[0].root is not None:
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                ie.revision = parent_invs[0].root.revision
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            else:
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                ie.revision = None
 
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            # When serializing out to disk and back in
 
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            # root.revision is always _new_revision_id
 
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            ie.revision = self._new_revision_id
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            return
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        previous_entries = ie.find_previous_heads(
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            parent_invs,