doc/runrst

fileset: use decorator to mark a predicate as "status caller"

Before this patch, predicates calling 'matchctx.status()' are listed
up by immediate list value in 'getfileset()'.

This prevents 3rd party extensions from adding specific predicate
calling 'matchctx.status()'.

This uses decorator to mark a predicate as "status caller".

This can also localize changes for adding (or removing) a "status
caller" predicate function in source code.

#!/usr/bin/env python
#
# runrst - register custom roles and run correct writer
#
# Copyright 2010 Matt Mackall <[e-mail]> 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:]
    if cmd == 'help' and args:
        cmd = args[0] # link to 'dates' for 'hg help dates'
    node = nodes.reference(rawtext, '', linktext,
                           refuri="hg.1.html#%s" % cmd)
    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)