# $Hg$

import re, sys

def kwencode():
    '''Truncates hg keywords in IO stream
    from
    <Dollar>Hg: <filename> <cset id> <stuff> <Dollar>
    to
    <Dollar>Hg<Dollar>.'''
    kwrepl = r'%sHg$' % '$'
    re_kwtrunc = re.compile(r'[$]Hg: .+?,v [a-z0-9]{12} [^$]+? \$')
    sys.stdout.write(re_kwtrunc.sub(kwrepl, sys.stdin.read()))