#!/usr/bin/env python3

import re

import common
from shell_helpers import LF
import os
import subprocess

class Main(common.LkmcCliFunction):
    def __init__(self):
        super().__init__(
            defaults = {
                'show_time': False,
            },
            description='''\
https://github.com/cirosantilli/linux-kernel-module-cheat#build-the-documentation
''',
        )

    def timed_main(self):
        asciidoctor_dir = os.path.join(self.env['root_dir'], 'asciidoctor')
        exit_status = self.sh.run_cmd(
            [
                'asciidoctor', LF,
                '--failure-level', 'info', LF,
                '--require', os.path.join(asciidoctor_dir, 'link-target-up.rb'), LF,
                '--out-file', self.env['readme_out'], LF,
                '--trace', LF,
                '--verbose', LF,
                self.env['readme'], LF,
            ],
            out_file=self.env['build_doc_log'],
        )
        external_link_re = re.compile('^https?://')
        for link in subprocess.check_output([
            os.path.join(asciidoctor_dir, 'extract-link-targets'),
            self.env['readme']
        ]).decode().splitlines():
            if not external_link_re.match(link):
                if not os.path.lexists(link):
                    print('error: broken link: ' + link)
                    exit_status = 1
        return exit_status

if __name__ == '__main__':
    Main().cli()