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from symbolic import SymbolicReference
__all__ = ["HEAD"]
class HEAD(SymbolicReference):
"""Special case of a Symbolic Reference as it represents the repository's
HEAD reference."""
_HEAD_NAME = 'HEAD'
_ORIG_HEAD_NAME = 'ORIG_HEAD'
__slots__ = tuple()
def __init__(self, repo, path=_HEAD_NAME):
if path != self._HEAD_NAME:
raise ValueError("HEAD instance must point to %r, got %r" % (self._HEAD_NAME, path))
super(HEAD, self).__init__(repo, path)
def orig_head(self):
"""
:return: SymbolicReference pointing at the ORIG_HEAD, which is maintained
to contain the previous value of HEAD"""
return SymbolicReference(self.repo, self._ORIG_HEAD_NAME)
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