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Viewing changes to bzrlib/versionedfile.py

(mbp) handle doubly-stacked repositories in get_known_graph_ancestry (bug
 715000) (Martin Pool)

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bzrlib/versionedfile.py
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    def _extract_blocks(self, version_id, source, target):
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        return None
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    def _transitive_fallbacks(self):
 
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        """Return the whole stack of fallback versionedfiles.
 
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        This VersionedFiles may have a list of fallbacks, but it doesn't
 
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        necessarily know about the whole stack going down, and it can't know
 
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        at open time because they may change after the objects are opened.
 
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        """
 
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        all_fallbacks = []
 
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        for a_vfs in self._fallback_vfs:
 
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            all_fallbacks.append(a_vfs)
 
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            all_fallbacks.extend(a_vfs._transitive_fallbacks())
 
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        return all_fallbacks
 
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class ThunkedVersionedFiles(VersionedFiles):
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    """Storage for many versioned files thunked onto a 'VersionedFile' class.