This file is indexed.

/usr/lib/python2.7/dist-packages/sphinx/roles.py is in python-sphinx 1.3.6-2ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
# -*- coding: utf-8 -*-
"""
    sphinx.roles
    ~~~~~~~~~~~~

    Handlers for additional ReST roles.

    :copyright: Copyright 2007-2016 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import re

from six import iteritems
from docutils import nodes, utils
from docutils.parsers.rst import roles

from sphinx import addnodes
from sphinx.locale import _
from sphinx.errors import SphinxError
from sphinx.util import ws_re
from sphinx.util.nodes import split_explicit_title, process_index_entry, \
    set_role_source_info


generic_docroles = {
    'command': addnodes.literal_strong,
    'dfn': nodes.emphasis,
    'kbd': nodes.literal,
    'mailheader': addnodes.literal_emphasis,
    'makevar': addnodes.literal_strong,
    'manpage': addnodes.literal_emphasis,
    'mimetype': addnodes.literal_emphasis,
    'newsgroup': addnodes.literal_emphasis,
    'program': addnodes.literal_strong,  # XXX should be an x-ref
    'regexp': nodes.literal,
}

for rolename, nodeclass in iteritems(generic_docroles):
    generic = roles.GenericRole(rolename, nodeclass)
    role = roles.CustomRole(rolename, generic, {'classes': [rolename]})
    roles.register_local_role(rolename, role)


# -- generic cross-reference role ----------------------------------------------

class XRefRole(object):
    """
    A generic cross-referencing role.  To create a callable that can be used as
    a role function, create an instance of this class.

    The general features of this role are:

    * Automatic creation of a reference and a content node.
    * Optional separation of title and target with `title <target>`.
    * The implementation is a class rather than a function to make
      customization easier.

    Customization can be done in two ways:

    * Supplying constructor parameters:
      * `fix_parens` to normalize parentheses (strip from target, and add to
        title if configured)
      * `lowercase` to lowercase the target
      * `nodeclass` and `innernodeclass` select the node classes for
        the reference and the content node

    * Subclassing and overwriting `process_link()` and/or `result_nodes()`.
    """

    nodeclass = addnodes.pending_xref
    innernodeclass = nodes.literal

    def __init__(self, fix_parens=False, lowercase=False,
                 nodeclass=None, innernodeclass=None, warn_dangling=False):
        self.fix_parens = fix_parens
        self.lowercase = lowercase
        self.warn_dangling = warn_dangling
        if nodeclass is not None:
            self.nodeclass = nodeclass
        if innernodeclass is not None:
            self.innernodeclass = innernodeclass

    def _fix_parens(self, env, has_explicit_title, title, target):
        if not has_explicit_title:
            if title.endswith('()'):
                # remove parentheses
                title = title[:-2]
            if env.config.add_function_parentheses:
                # add them back to all occurrences if configured
                title += '()'
        # remove parentheses from the target too
        if target.endswith('()'):
            target = target[:-2]
        return title, target

    def __call__(self, typ, rawtext, text, lineno, inliner,
                 options={}, content=[]):
        env = inliner.document.settings.env
        if not typ:
            typ = env.temp_data.get('default_role')
            if not typ:
                typ = env.config.default_role
            if not typ:
                raise SphinxError('cannot determine default role!')
        else:
            typ = typ.lower()
        if ':' not in typ:
            domain, role = '', typ
            classes = ['xref', role]
        else:
            domain, role = typ.split(':', 1)
            classes = ['xref', domain, '%s-%s' % (domain, role)]
        # if the first character is a bang, don't cross-reference at all
        if text[0:1] == '!':
            text = utils.unescape(text)[1:]
            if self.fix_parens:
                text, tgt = self._fix_parens(env, False, text, "")
            innernode = self.innernodeclass(rawtext, text, classes=classes)
            return self.result_nodes(inliner.document, env, innernode,
                                     is_ref=False)
        # split title and target in role content
        has_explicit_title, title, target = split_explicit_title(text)
        title = utils.unescape(title)
        target = utils.unescape(target)
        # fix-up title and target
        if self.lowercase:
            target = target.lower()
        if self.fix_parens:
            title, target = self._fix_parens(
                env, has_explicit_title, title, target)
        # create the reference node
        refnode = self.nodeclass(rawtext, reftype=role, refdomain=domain,
                                 refexplicit=has_explicit_title)
        # we may need the line number for warnings
        set_role_source_info(inliner, lineno, refnode)
        title, target = self.process_link(
            env, refnode, has_explicit_title, title, target)
        # now that the target and title are finally determined, set them
        refnode['reftarget'] = target
        refnode += self.innernodeclass(rawtext, title, classes=classes)
        # we also need the source document
        refnode['refdoc'] = env.docname
        refnode['refwarn'] = self.warn_dangling
        # result_nodes allow further modification of return values
        return self.result_nodes(inliner.document, env, refnode, is_ref=True)

    # methods that can be overwritten

    def process_link(self, env, refnode, has_explicit_title, title, target):
        """Called after parsing title and target text, and creating the
        reference node (given in *refnode*).  This method can alter the
        reference node and must return a new (or the same) ``(title, target)``
        tuple.
        """
        return title, ws_re.sub(' ', target)

    def result_nodes(self, document, env, node, is_ref):
        """Called before returning the finished nodes.  *node* is the reference
        node if one was created (*is_ref* is then true), else the content node.
        This method can add other nodes and must return a ``(nodes, messages)``
        tuple (the usual return value of a role function).
        """
        return [node], []


class AnyXRefRole(XRefRole):
    def process_link(self, env, refnode, has_explicit_title, title, target):
        result = XRefRole.process_link(self, env, refnode, has_explicit_title,
                                       title, target)
        # add all possible context info (i.e. std:program, py:module etc.)
        refnode.attributes.update(env.ref_context)
        return result


def indexmarkup_role(typ, rawtext, text, lineno, inliner,
                     options={}, content=[]):
    """Role for PEP/RFC references that generate an index entry."""
    env = inliner.document.settings.env
    if not typ:
        typ = env.config.default_role
    else:
        typ = typ.lower()
    has_explicit_title, title, target = split_explicit_title(text)
    title = utils.unescape(title)
    target = utils.unescape(target)
    targetid = 'index-%s' % env.new_serialno('index')
    indexnode = addnodes.index()
    targetnode = nodes.target('', '', ids=[targetid])
    inliner.document.note_explicit_target(targetnode)
    if typ == 'pep':
        indexnode['entries'] = [
            ('single', _('Python Enhancement Proposals; PEP %s') % target,
             targetid, '')]
        anchor = ''
        anchorindex = target.find('#')
        if anchorindex > 0:
            target, anchor = target[:anchorindex], target[anchorindex:]
        if not has_explicit_title:
            title = "PEP " + utils.unescape(title)
        try:
            pepnum = int(target)
        except ValueError:
            msg = inliner.reporter.error('invalid PEP number %s' % target,
                                         line=lineno)
            prb = inliner.problematic(rawtext, rawtext, msg)
            return [prb], [msg]
        ref = inliner.document.settings.pep_base_url + 'pep-%04d' % pepnum
        sn = nodes.strong(title, title)
        rn = nodes.reference('', '', internal=False, refuri=ref+anchor,
                             classes=[typ])
        rn += sn
        return [indexnode, targetnode, rn], []
    elif typ == 'rfc':
        indexnode['entries'] = [('single', 'RFC; RFC %s' % target, targetid, '')]
        anchor = ''
        anchorindex = target.find('#')
        if anchorindex > 0:
            target, anchor = target[:anchorindex], target[anchorindex:]
        if not has_explicit_title:
            title = "RFC " + utils.unescape(title)
        try:
            rfcnum = int(target)
        except ValueError:
            msg = inliner.reporter.error('invalid RFC number %s' % target,
                                         line=lineno)
            prb = inliner.problematic(rawtext, rawtext, msg)
            return [prb], [msg]
        ref = inliner.document.settings.rfc_base_url + inliner.rfc_url % rfcnum
        sn = nodes.strong(title, title)
        rn = nodes.reference('', '', internal=False, refuri=ref+anchor,
                             classes=[typ])
        rn += sn
        return [indexnode, targetnode, rn], []


_amp_re = re.compile(r'(?<!&)&(?![&\s])')


def menusel_role(typ, rawtext, text, lineno, inliner, options={}, content=[]):
    text = utils.unescape(text)
    if typ == 'menuselection':
        text = text.replace('-->', u'\N{TRIANGULAR BULLET}')
    spans = _amp_re.split(text)

    node = nodes.inline(rawtext=rawtext)
    for i, span in enumerate(spans):
        span = span.replace('&&', '&')
        if i == 0:
            if len(span) > 0:
                textnode = nodes.Text(span)
                node += textnode
            continue
        accel_node = nodes.inline()
        letter_node = nodes.Text(span[0])
        accel_node += letter_node
        accel_node['classes'].append('accelerator')
        node += accel_node
        textnode = nodes.Text(span[1:])
        node += textnode

    node['classes'].append(typ)
    return [node], []


_litvar_re = re.compile('{([^}]+)}')


def emph_literal_role(typ, rawtext, text, lineno, inliner,
                      options={}, content=[]):
    text = utils.unescape(text)
    pos = 0
    retnode = nodes.literal(role=typ.lower(), classes=[typ])
    for m in _litvar_re.finditer(text):
        if m.start() > pos:
            txt = text[pos:m.start()]
            retnode += nodes.Text(txt, txt)
        retnode += nodes.emphasis(m.group(1), m.group(1))
        pos = m.end()
    if pos < len(text):
        retnode += nodes.Text(text[pos:], text[pos:])
    return [retnode], []


_abbr_re = re.compile('\((.*)\)$', re.S)


def abbr_role(typ, rawtext, text, lineno, inliner, options={}, content=[]):
    text = utils.unescape(text)
    m = _abbr_re.search(text)
    if m is None:
        return [addnodes.abbreviation(text, text, **options)], []
    abbr = text[:m.start()].strip()
    expl = m.group(1)
    options = options.copy()
    options['explanation'] = expl
    return [addnodes.abbreviation(abbr, abbr, **options)], []


def index_role(typ, rawtext, text, lineno, inliner, options={}, content=[]):
    # create new reference target
    env = inliner.document.settings.env
    targetid = 'index-%s' % env.new_serialno('index')
    targetnode = nodes.target('', '', ids=[targetid])
    # split text and target in role content
    has_explicit_title, title, target = split_explicit_title(text)
    title = utils.unescape(title)
    target = utils.unescape(target)
    # if an explicit target is given, we can process it as a full entry
    if has_explicit_title:
        entries = process_index_entry(target, targetid)
    # otherwise we just create a "single" entry
    else:
        # but allow giving main entry
        main = ''
        if target.startswith('!'):
            target = target[1:]
            title = title[1:]
            main = 'main'
        entries = [('single', target, targetid, main)]
    indexnode = addnodes.index()
    indexnode['entries'] = entries
    set_role_source_info(inliner, lineno, indexnode)
    textnode = nodes.Text(title, title)
    return [indexnode, targetnode, textnode], []


specific_docroles = {
    # links to download references
    'download': XRefRole(nodeclass=addnodes.download_reference),
    # links to documents
    'doc': XRefRole(warn_dangling=True),
    # links to anything
    'any': AnyXRefRole(warn_dangling=True),

    'pep': indexmarkup_role,
    'rfc': indexmarkup_role,
    'guilabel': menusel_role,
    'menuselection': menusel_role,
    'file': emph_literal_role,
    'samp': emph_literal_role,
    'abbr': abbr_role,
    'index': index_role,
}

for rolename, func in iteritems(specific_docroles):
    roles.register_local_role(rolename, func)