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bzrlib/version.py
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# Copyright (C) 2004, 2005, 2006 Canonical Ltd
 
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# Copyright (C) 2004, 2005, 2006, 2007 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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import sys
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import bzrlib
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from bzrlib import config, errors, osutils
 
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from bzrlib import (
 
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    bzrdir,
 
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    config,
 
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    errors,
 
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    osutils,
 
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    )
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from bzrlib.branch import Branch
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    If bzr is not being run from its working tree, returns None.
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    """
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    try:
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        from bzrlib.workingtree import WorkingTree
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        return WorkingTree.open_containing(__file__)[0]
 
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        control = bzrdir.BzrDir.open_containing(__file__)[0]
 
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        return control.open_workingtree(recommend_upgrade=False)
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    except (errors.NotBranchError, errors.UnknownFormatError,
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            errors.NoWorkingTree):
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        return None