#!/usr/bin/env python

#

# check-config - a config flag documentation checker for Mercurial

#

# Copyright 2015 Matt Mackall <mpm@selenic.com>

#

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

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

import re

import sys

foundopts = {}

documented = {}

configre = (r"""ui\.config(|int|bool|list)\(['"](\S+)['"],\s*"""

            r"""['"](\S+)['"](,\s+(?:default=)?(\S+?))?\)""")

configpartialre = (r"""ui\.config""")

def main(args):

    for f in args:

        sect = ''

        prevname = ''

        confsect = ''

        carryover = ''

        for l in open(f):

            # check topic-like bits

            m = re.match('\s*``(\S+)``', l)

            if m:

                prevname = m.group(1)

            if re.match('^\s*-+$', l):

                sect = prevname

                prevname = ''

            if sect and prevname:

                name = sect + '.' + prevname

                documented[name] = 1

            # check docstring bits

            m = re.match(r'^\s+\[(\S+)\]', l)

            if m:

                confsect = m.group(1)

                continue

            m = re.match(r'^\s+(?:#\s*)?(\S+) = ', l)

            if m:

                name = confsect + '.' + m.group(1)

                documented[name] = 1

            # like the bugzilla extension

            m = re.match(r'^\s*(\S+\.\S+)$', l)

            if m:

                documented[m.group(1)] = 1

            # like convert

            m = re.match(r'^\s*:(\S+\.\S+):\s+', l)

            if m:

                documented[m.group(1)] = 1

            # quoted in help or docstrings

            m = re.match(r'.*?``(\S+\.\S+)``', l)

            if m:

                documented[m.group(1)] = 1

            # look for ignore markers

            m = re.search(r'# (?:internal|experimental|deprecated|developer)'

                          ' config: (\S+\.\S+)$', l)

            if m:

                documented[m.group(1)] = 1

            # look for code-like bits

            line = carryover + l

            m = re.search(configre, line, re.MULTILINE)

            if m:

                ctype = m.group(1)

                if not ctype:

                    ctype = 'str'

                name = m.group(2) + "." + m.group(3)

                default = m.group(5)

                if default in (None, 'False', 'None', '0', '[]', '""', "''"):

                    default = ''

                if re.match('[a-z.]+$', default):

                    default = '<variable>'

                if name in foundopts and (ctype, default) != foundopts[name]:

                foundopts[name] = (ctype, default)

                carryover = ''

            else:

                m = re.search(configpartialre, line)

                if m:

                    carryover = line

                else:

                    carryover = ''

    for name in sorted(foundopts):

        if name not in documented:

            if not (name.startswith("devel.") or

                    name.startswith("experimental.") or

                    name.startswith("debug.")):

                ctype, default = foundopts[name]

                if default:

                    default = ' [%s]' % default

if __name__ == "__main__":

    if len(sys.argv) > 1:

        sys.exit(main(sys.argv[1:]))

    else:

        sys.exit(main([l.rstrip() for l in sys.stdin]))