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  • Committer: Martin Pool
  • Date: 2005-09-29 05:06:14 UTC
  • mto: (1185.12.2) (1393.1.12)
  • mto: This revision was merged to the branch mainline in revision 1396.
  • Revision ID: mbp@sourcefrog.net-20050929050614-a41e6f72af36bb4c
- better error on failing to import bzrlib

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bzrlib/atomicfile.py
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from warnings import warn
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from bzrlib.osutils import rename
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import errno
 
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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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    An encoding can be specified; otherwise the default is ascii.
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    """
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    def __init__(self, filename, mode='wb', encoding=None, new_mode=None):
 
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    def __init__(self, filename, mode='wb', encoding=None):
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        if mode != 'wb' and mode != 'wt':
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            raise ValueError("invalid AtomicFile mode %r" % mode)
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        self.write = self.f.write
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        self.closed = False
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        self._new_mode = new_mode
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    def __repr__(self):
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        self.f.close()
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        self.f = None
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        try:
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            if self._new_mode is None:
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                self._new_mode = os.lstat(self.realfilename).st_mode
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        except OSError, e:
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            if e.errno != errno.ENOENT:
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                raise
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        else:
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            os.chmod(self.tmpfilename, self._new_mode)
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        rename(self.tmpfilename, self.realfilename)
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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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