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Viewing changes to bzrlib/store/weave.py

[merge] bzr.dev 1491

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bzrlib/store/weave.py
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        w = self.get_weave(file_id, transaction)
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        return w.get(w.lookup(rev_id))
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    def get_weave_prelude_or_empty(self, file_id, transaction):
 
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        """cheap version that reads the prelude but not the lines
 
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        """
 
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        weave = transaction.map.find_weave(file_id)
 
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        if weave:
 
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            mutter("cache hit in %s for %s", self, file_id)
 
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            return weave
 
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        try:
 
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            return read_weave(self._get(file_id),prelude=True)
 
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        except NoSuchFile:
 
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            return Weave(weave_name=file_id)
 
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    def get_weave_or_empty(self, file_id, transaction):
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        """Return a weave, or an empty one if it doesn't exist.""" 
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        try: