#!/usr/bin/env python
#
# Copyright 2019 Espressif Systems (Shanghai) PTE LTD
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from __future__ import print_function
import os
import sys

if __name__ == '__main__':
    # Checks for the content of environment variable TERM to use with the Python- and curses-based menuconfig. It is
    # not implemented in shell so calling this script could not use some other shell environment where TERM is set
    # differently. Implemented here so it could be checked at one place for make and cmake as well.
    if sys.platform == 'win32' and 'MSYSTEM' not in os.environ:
        # no TERM is used in Windows command line
        exit(0)

    term = os.environ.get('TERM', None)

    if term is None:
        print('WARNING: The TERM environment variable is not defined. The curses-based menuconfig '
              'will probably fail to run. Please consult the documentation of your terminal to set it up.')
    else:
        if term.endswith('256color'):
            print('TERM environment variable is set to "{}"'.format(term))
        else:
            print('WARNING: Menuconfig may fail because of the TERM environment variable is set '
                  'to "{}". Please consult the documentation of your terminal to set it up. '
                  'Some good, proved to been working setups include xterm-256color, screen-256color, '
                  'rxvt-unicode-256color.'.format(term))