def find_cygwin_executables(cls):
        """
        find the executables in cygwin
        """
        exe_paths = glob.glob(cls.cygwin_path + r'\*.exe')
        # print cls.cygwin_path
        # list all *.exe in  cygwin path, use glob
        for c in exe_paths:
            exe = c.split('\\')
            name = exe[1].split('.')[0]
            # command['windows'][name] = "{:}\{:}.exe".format(cygwin_path, c)
            cls.command['windows'][name] = c
find the executables in cygwin