#!/usr/bin/env python

#

# docchecker - look for problematic markup

#

# Copyright 2016 timeless <timeless@mozdev.org> and others

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

from __future__ import absolute_import, print_function

import re

import sys

leadingline = re.compile(r'(^\s*)(\S.*)$')

checks = [

  (r""":hg:`[^`]*'[^`]*`""",

    """warning: please avoid nesting ' in :hg:`...`"""),

  (r'\w:hg:`',

    'warning: please have a space before :hg:'),

  (r"""(?:[^a-z][^'.])hg ([^,;"`]*'(?!hg)){2}""",

    '''warning: please use " instead of ' for hg ... "..."'''),

]

def check(line):

    messages = []

    for match, msg in checks:

        if re.search(match, line):

            messages.append(msg)

    if messages:

        print(line)

        for msg in messages:

            print(msg)

def work(file):

    (llead, lline) = ('', '')

    for line in file:

        # this section unwraps lines

        match = leadingline.match(line)

        if not match:

            check(lline)

            (llead, lline) = ('', '')

            continue

        lead, line = match.group(1), match.group(2)

        if (lead == llead):

            if (lline != ''):

                lline += ' ' + line

            else:

                lline = line

        else:

            check(lline)

            (llead, lline) = (lead, line)

    check(lline)

def main():

    for f in sys.argv[1:]:

        try:

            with open(f) as file:

                work(file)

        except BaseException as e:

            print("failed to process %s: %s" % (f, e))

main()