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bzrlib/atomicfile.py
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from warnings import warn
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from osutils import rename
 
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class AtomicFile(object):
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    """A file that does an atomic-rename to move into place.
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        self.f.close()
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        self.f = None
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        rename(self.tmpfilename, self.realfilename)
 
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        if sys.platform == 'win32':
 
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            # windows cannot rename over an existing file
 
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            try:
 
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                os.remove(self.realfilename)
 
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            except OSError, e:
 
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                import errno
 
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                if e.errno != errno.ENOENT:
 
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                    raise
 
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        os.rename(self.tmpfilename, self.realfilename)
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    def abort(self):
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    def __del__(self):
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        if hasattr(self, 'closed') and not self.closed:
 
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        if not self.closed:
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            warn("%r leaked" % self)
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