+def main():
+ parser = optparse.OptionParser(usage='%prog OUTFILE.md')
+ _, args = parser.parse_args()
+ if len(args) != 1:
+ parser.error('Expected an output filename')
+
+ outfile, = args
+
+ with 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 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()