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#!/usr/bin/env python3
from __future__ import unicode_literals
import io
import optparse
import os.path
import re
ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
README_FILE = os.path.join(ROOT_DIR, 'README.md')
PREFIX = r'''%HYPERVIDEO(1)
# NAME
yt\-dlp \- A youtube-dl fork with additional features and patches
# SYNOPSIS
**hypervideo** \[OPTIONS\] URL [URL...]
# DESCRIPTION
'''
def main():
parser = optparse.OptionParser(usage='%prog OUTFILE.md')
options, args = parser.parse_args()
if len(args) != 1:
parser.error('Expected an output filename')
outfile, = args
with io.open(README_FILE, encoding='utf-8') as f:
readme = f.read()
readme = filter_excluded_sections(readme)
readme = move_sections(readme)
readme = filter_options(readme)
with io.open(outfile, 'w', encoding='utf-8') as outf:
outf.write(PREFIX + readme)
def filter_excluded_sections(readme):
EXCLUDED_SECTION_BEGIN_STRING = re.escape('<!-- MANPAGE: BEGIN EXCLUDED SECTION -->')
EXCLUDED_SECTION_END_STRING = re.escape('<!-- MANPAGE: END EXCLUDED SECTION -->')
return re.sub(
rf'(?s){EXCLUDED_SECTION_BEGIN_STRING}.+?{EXCLUDED_SECTION_END_STRING}\n',
'', readme)
def move_sections(readme):
MOVE_TAG_TEMPLATE = '<!-- MANPAGE: MOVE "%s" SECTION HERE -->'
sections = re.findall(r'(?m)^%s$' % (
re.escape(MOVE_TAG_TEMPLATE).replace(r'\%', '%') % '(.+)'), readme)
for section_name in sections:
move_tag = MOVE_TAG_TEMPLATE % section_name
if readme.count(move_tag) > 1:
raise Exception(f'There is more than one occurrence of "{move_tag}". This is unexpected')
sections = re.findall(rf'(?sm)(^# {re.escape(section_name)}.+?)(?=^# )', readme)
if len(sections) < 1:
raise Exception(f'The section {section_name} does not exist')
elif len(sections) > 1:
raise Exception(f'There are multiple occurrences of section {section_name}, this is unhandled')
readme = readme.replace(sections[0], '', 1).replace(move_tag, sections[0], 1)
return readme
def filter_options(readme):
section = re.search(r'(?sm)^# USAGE AND OPTIONS\n.+?(?=^# )', readme).group(0)
options = '# OPTIONS\n'
for line in section.split('\n')[1:]:
mobj = re.fullmatch(r'''(?x)
\s{4}(?P<opt>-(?:,\s|[^\s])+)
(?:\s(?P<meta>(?:[^\s]|\s(?!\s))+))?
(\s{2,}(?P<desc>.+))?
''', line)
if not mobj:
options += f'{line.lstrip()}\n'
continue
option, metavar, description = mobj.group('opt', 'meta', 'desc')
# Pandoc's definition_lists. See http://pandoc.org/README.html
option = f'{option} *{metavar}*' if metavar else option
description = f'{description}\n' if description else ''
options += f'\n{option}\n: {description}'
continue
return readme.replace(section, options, 1)
if __name__ == '__main__':
main()
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