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bzrlib/revision.py
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# Copyright (C) 2005, 2006 Canonical
 
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# Copyright (C) 2005, 2006 Canonical Ltd
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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        )
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NULL_REVISION="null:"
 
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CURRENT_REVISION="current:"
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class Revision(object):
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        next = best_ancestor(next)
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    path.reverse()
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    return path
 
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def is_reserved_id(revision_id):
 
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    """Determine whether a revision id is reserved
 
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    :return: True if the revision is is reserved, False otherwise
 
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    """
 
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    return isinstance(revision_id, basestring) and revision_id.endswith(':')
 
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def check_not_reserved_id(revision_id):
 
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    """Raise ReservedId if the supplied revision_id is reserved"""
 
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    if is_reserved_id(revision_id):
 
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        raise errors.ReservedId(revision_id)