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Viewing changes to bzrlib/mutabletree.py

  • Committer: Canonical.com Patch Queue Manager
  • Date: 2009-07-10 09:37:08 UTC
  • mfrom: (4524.1.1 integration)
  • Revision ID: pqm@pqm.ubuntu.com-20090710093708-s3ru5i9avw0pykjm
(vila) Quicker check for changes in mutable trees

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Lines of Context:
bzrlib/mutabletree.py
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        raise NotImplementedError(self._gather_kinds)
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    @needs_read_lock
 
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    def has_changes(self, from_tree):
 
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        """Quickly check that the tree contains at least one change.
 
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        :return: True if a change is found. False otherwise
 
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        """
 
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        changes = self.iter_changes(from_tree)
 
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        try:
 
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            change = changes.next()
 
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            # Exclude root (talk about black magic... --vila 20090629)
 
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            if change[4] == (None, None):
 
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                change = changes.next()
 
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            return True
 
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        except StopIteration:
 
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            # No changes
 
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            return False
 
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    @needs_read_lock
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    def last_revision(self):
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        """Return the revision id of the last commit performed in this tree.
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