#!/usr/bin/env python3

import sys
import re

line_re = [
  r'^\/\/\={69}$',
  r'^\/\/ \w+',
  r'^\/\/ spdx-license-identifier: (ISC)',
  r'^\/\/ description: \w+'
]

if __name__ == '__main__':
  errors = 0

  with open(sys.argv[1]) as f:
    for i in range(len(line_re)):
      if re.search(line_re[i], f.readline()) == None:
        print(f'wrong license header: {sys.argv[1]}:{i}')
        errors += 1

  if errors != 0:
    sys.exit(1)