101     # execute hg out of this directory with a custom environment which

   101     # execute hg out of this directory with a custom environment which

   102     # includes the pure Python modules in mercurial/pure

   102     # includes the pure Python modules in mercurial/pure

   103     pypath = os.environ.get('PYTHONPATH', '')

   103     pypath = os.environ.get('PYTHONPATH', '')

   104     purepath = os.path.join('mercurial', 'pure')

   104     purepath = os.path.join('mercurial', 'pure')

   105     os.environ['PYTHONPATH'] = os.pathsep.join(['mercurial', purepath, pypath])

   105     os.environ['PYTHONPATH'] = os.pathsep.join(['mercurial', purepath, pypath])

   106     cmd = '%s hg id -it' % sys.executable

   107     cmd = '%s hg id -it' % sys.executable

   107     l = os.popen(cmd).read().split()

   108     l = os.popen(cmd).read().split()

   108     os.environ['PYTHONPATH'] = pypath

   109     os.environ['PYTHONPATH'] = pypath

   109     while len(l) > 1 and l[-1][0].isalpha(): # remove non-numbered tags

   110     while len(l) > 1 and l[-1][0].isalpha(): # remove non-numbered tags

   110         l.pop()

   111         l.pop()