#!/usr/bin/env python

#

# runrst - register custom roles and run correct writer

#

# Copyright 2010 Matt Mackall <mpm@selenic.com> 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.

"""usage: %s WRITER args...

where WRITER is the name of a Docutils writer such as 'html' or 'manpage'

"""

import sys

try:

    from docutils.parsers.rst import roles

    from docutils.core import publish_cmdline

    from docutils import nodes, utils

except ImportError:

    sys.stderr.write("abort: couldn't generate documentation: docutils "

                     "module is missing\n")

    sys.stderr.write("please install python-docutils or see "

                     "http://docutils.sourceforge.net/\n")

    sys.exit(-1)

def role_hg(name, rawtext, text, lineno, inliner,

            options={}, content=[]):

    text = "hg " + utils.unescape(text)

    linktext = nodes.literal(rawtext, text)

    parts = text.split()

    cmd, args = parts[1], parts[2:]

    refuri = "hg.1.html#%s" % cmd

    if cmd == 'help' and args:

        if args[0] == 'config':

            # :hg:`help config`

            refuri = "hgrc.5.html"

        elif args[0].startswith('config.'):

            # :hg:`help config.SECTION...`

            refuri = "hgrc.5.html#%s" % args[0].split('.', 2)[1]

        elif len(args) >= 2 and args[0] == '-c':

            # :hg:`help -c COMMAND ...` is equivalent to :hg:`COMMAND`

            # (mainly for :hg:`help -c config`)

            refuri = "hg.1.html#%s" % args[1]

        else:

            refuri = "hg.1.html#%s" % args[0]

    node = nodes.reference(rawtext, '', linktext,

                           refuri=refuri)

    return [node], []

roles.register_local_role("hg", role_hg)

if __name__ == "__main__":

    if len(sys.argv) < 2:

        sys.stderr.write(__doc__ % sys.argv[0])

        sys.exit(1)

    writer = sys.argv[1]

    del sys.argv[1]

    publish_cmdline(writer_name=writer)