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  • Committer: Robert Collins
  • Date: 2005-10-11 02:52:47 UTC
  • mfrom: (1417.1.13)
  • Revision ID: robertc@robertcollins.net-20051011025247-4b95466bb6509385
merge in revision-history caching, and tuning of fetch to not retrieve more data than needed when nothing needs to be pulled

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bzrlib/branch.py
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            self._lock_count = 1
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            self._set_transaction(transactions.PassThroughTransaction())
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    def lock_read(self):
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        mutter("lock read: %s (%s)", self, self._lock_count)
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        if self._lock_mode:
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            self._lock_mode = 'r'
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            self._lock_count = 1
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            self._set_transaction(transactions.ReadOnlyTransaction())
 
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            # 5K may be excessive, but hey, its a knob.
 
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            self.get_transaction().set_cache_size(5000)
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    def unlock(self):
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        mutter("unlock: %s (%s)", self, self._lock_count)
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        """Return sequence of revision hashes on to this branch."""
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        self.lock_read()
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        try:
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            return [l.rstrip('\r\n') for l in
 
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            transaction = self.get_transaction()
 
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            history = transaction.map.find_revision_history()
 
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            if history is not None:
 
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                mutter("cache hit for revision-history in %s", self)
 
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                return list(history)
 
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            history = [l.rstrip('\r\n') for l in
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                    self.controlfile('revision-history', 'r').readlines()]
 
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            transaction.map.add_revision_history(history)
 
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            # this call is disabled because revision_history is 
 
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            # not really an object yet, and the transaction is for objects.
 
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            # transaction.register_clean(history, precious=True)
 
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            return list(history)
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        finally:
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            self.unlock()
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