nghttp2/man2rst.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import sys
import re
def man2rst(f):
expect_arg = False
in_arg = False
for line in f:
line = line.rstrip()
if re.match(r'\.\\"', line):
# comment
continue
if re.match(r'\.TH ', line):
# title
title = line.split()[1].lower()
sys.stdout.write('.. program:: {}\n\n'.format(title))
title += '(1)'
sys.stdout.write('{}\n'.format(title))
sys.stdout.write('=' * len(title))
sys.stdout.write('\n')
continue
if re.match(r'\.SH ', line):
# section
expect_arg = False
in_arg = False
section = line.split(' ', 1)[1].strip('"')
sys.stdout.write('\n{}\n'.format(section))
sys.stdout.write('-' * len(section))
sys.stdout.write('\n')
continue
if re.match(r'\.br', line):
sys.stdout.write('\n')
continue
if re.match(r'\.B ', line):
prog = line.split(' ', 1)[1]
sys.stdout.write('**{}** '.format(prog))
continue
if re.match(r'\.SS ', line):
# subsection
expect_arg = False
in_arg = False
subsection = line.split(' ', 1)[1].strip('"').rstrip(':')
sys.stdout.write('\n{}\n'.format(subsection))
sys.stdout.write('^' * len(subsection))
sys.stdout.write('\n')
continue
if re.match(r'\.(T|H|I)P', line):
expect_arg = True
in_arg = False
sys.stdout.write('\n')
continue
if expect_arg and line.startswith('<'):
expect_arg = False
in_arg = True
positional_arg = line.lstrip('<').rstrip('>')
sys.stdout.write('.. option:: {}\n\n'.format(positional_arg))
continue
if expect_arg and line.startswith('('):
expect_arg = False
in_arg = True
sys.stdout.write('.. describe:: {}\n\n'.format(line))
continue
if expect_arg:
expect_arg = False
m = re.match(r'(\\fB.*?\\fR(?:, \\fB.*?\\fR)?[\S]*)(.*)', line)
if not m:
sys.stdout.write('{}\n'.format(process_text(line)))
continue
in_arg = True
optional_arg = process_arg(m.group(1))
text = m.group(2).strip()
sys.stdout.write('.. option:: {}\n\n'.format(optional_arg))
sys.stdout.write(' {}\n'.format(process_text(text)))
continue
if in_arg:
sys.stdout.write(' {}\n'.format(process_text(line)))
continue
sys.stdout.write('{}\n'.format(process_text(line)))
def process_arg(text):
text = re.sub(r'\\fB(.*?)\\fR', '\\1', text)
text = re.sub(r'\\-', '-', text)
return text
def process_text(text):
text = re.sub(r'\\fI\\,(.*?)\\/\\f(?:R|P)', '\\1', text)
text = re.sub(r'\\fB\\(-[^1].*?)\\fR(\s|[,.]|\Z)', ':option:`\\1`\\2', text)
text = re.sub(r'\\fB(.*?)\\fR', '\\1', text)
text = re.sub(r'\\-', '-', text)
text = re.sub(r'\*', '\\*', text)
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text = re.sub(r'\\&', '', text)
return text
if __name__ == '__main__':
man2rst(sys.stdin)