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# vim: set fileencoding=utf-8 : 

# 

# (C) 2011 Guido Guenther <agx@sigxcpu.org> 

#    This program is free software; you can redistribute it and/or modify 

#    it under the terms of the GNU General Public License as published by 

#    the Free Software Foundation; either version 2 of the License, or 

#    (at your option) any later version. 

# 

#    This program is distributed in the hope that it will be useful, 

#    but WITHOUT ANY WARRANTY; without even the implied warranty of 

#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 

#    GNU General Public License for more details. 

# 

#    You should have received a copy of the GNU General Public License 

#    along with this program; if not, write to the Free Software 

#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

"""Git commit class and helpers""" 

 

import re 

 

from gbp.git.errors import GitError 

 

class GitCommit(object): 

    """A git commit""" 

    sha1_re = re.compile(r'[0-9a-f]{40}$') 

 

    @staticmethod 

    def is_sha1(value): 

        """ 

        Is I{value} a valid 40 digit SHA1? 

 

        >>> GitCommit.is_sha1('asdf') 

        False 

        >>> GitCommit.is_sha1('deadbeef') 

        False 

        >>> GitCommit.is_sha1('17975594b2d42f2a3d144a9678fdf2c2c1dd96a0') 

        True 

        >>> GitCommit.is_sha1('17975594b2d42f2a3d144a9678fdf2c2c1dd96a0toolong') 

        False 

 

        @param value: the value to check 

        @type value: C{str} 

        @return: C{True} if I{value} is a 40 digit SHA1, C{False} otherwise. 

        @rtype: C{bool} 

        """ 

        return True if GitCommit.sha1_re.match(value) else False