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https://github.com/edk2-porting/linux-next.git
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f66e47f98c
With the transition to Sphinx 3, new warnings were generated by automarkup, exposing bugs in the regexes. The warnings were caused by the expressions matching words in the translated versions of the documentation, since any unicode character was matched. Fix the regular expression by making the C regexes use ASCII and ensuring the expressions only match the beginning of words, in order to avoid warnings like this: WARNING: Unparseable C cross-reference: '调用debugfs_rename' That's probably due to the lack of using spaces between words on Chinese. Signed-off-by: Nícolas F. R. A. Prado <nfraprado@protonmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
213 lines
7.2 KiB
Python
213 lines
7.2 KiB
Python
# SPDX-License-Identifier: GPL-2.0
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# Copyright 2019 Jonathan Corbet <corbet@lwn.net>
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#
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# Apply kernel-specific tweaks after the initial document processing
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# has been done.
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#
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from docutils import nodes
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import sphinx
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from sphinx import addnodes
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if sphinx.version_info[0] < 2 or \
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sphinx.version_info[0] == 2 and sphinx.version_info[1] < 1:
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from sphinx.environment import NoUri
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else:
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from sphinx.errors import NoUri
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import re
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from itertools import chain
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#
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# Regex nastiness. Of course.
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# Try to identify "function()" that's not already marked up some
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# other way. Sphinx doesn't like a lot of stuff right after a
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# :c:func: block (i.e. ":c:func:`mmap()`s" flakes out), so the last
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# bit tries to restrict matches to things that won't create trouble.
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#
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RE_function = re.compile(r'\b(([a-zA-Z_]\w+)\(\))', flags=re.ASCII)
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#
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# Sphinx 2 uses the same :c:type role for struct, union, enum and typedef
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#
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RE_generic_type = re.compile(r'\b(struct|union|enum|typedef)\s+([a-zA-Z_]\w+)',
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flags=re.ASCII)
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#
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# Sphinx 3 uses a different C role for each one of struct, union, enum and
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# typedef
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#
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RE_struct = re.compile(r'\b(struct)\s+([a-zA-Z_]\w+)', flags=re.ASCII)
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RE_union = re.compile(r'\b(union)\s+([a-zA-Z_]\w+)', flags=re.ASCII)
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RE_enum = re.compile(r'\b(enum)\s+([a-zA-Z_]\w+)', flags=re.ASCII)
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RE_typedef = re.compile(r'\b(typedef)\s+([a-zA-Z_]\w+)', flags=re.ASCII)
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#
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# Detects a reference to a documentation page of the form Documentation/... with
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# an optional extension
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#
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RE_doc = re.compile(r'\bDocumentation(/[\w\-_/]+)(\.\w+)*')
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#
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# Many places in the docs refer to common system calls. It is
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# pointless to try to cross-reference them and, as has been known
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# to happen, somebody defining a function by these names can lead
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# to the creation of incorrect and confusing cross references. So
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# just don't even try with these names.
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#
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Skipfuncs = [ 'open', 'close', 'read', 'write', 'fcntl', 'mmap',
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'select', 'poll', 'fork', 'execve', 'clone', 'ioctl',
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'socket' ]
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def markup_refs(docname, app, node):
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t = node.astext()
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done = 0
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repl = [ ]
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#
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# Associate each regex with the function that will markup its matches
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#
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markup_func_sphinx2 = {RE_doc: markup_doc_ref,
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RE_function: markup_c_ref,
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RE_generic_type: markup_c_ref}
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markup_func_sphinx3 = {RE_doc: markup_doc_ref,
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RE_function: markup_c_ref,
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RE_struct: markup_c_ref,
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RE_union: markup_c_ref,
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RE_enum: markup_c_ref,
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RE_typedef: markup_c_ref}
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if sphinx.version_info[0] >= 3:
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markup_func = markup_func_sphinx3
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else:
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markup_func = markup_func_sphinx2
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match_iterators = [regex.finditer(t) for regex in markup_func]
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#
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# Sort all references by the starting position in text
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#
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sorted_matches = sorted(chain(*match_iterators), key=lambda m: m.start())
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for m in sorted_matches:
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#
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# Include any text prior to match as a normal text node.
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#
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if m.start() > done:
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repl.append(nodes.Text(t[done:m.start()]))
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#
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# Call the function associated with the regex that matched this text and
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# append its return to the text
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#
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repl.append(markup_func[m.re](docname, app, m))
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done = m.end()
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if done < len(t):
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repl.append(nodes.Text(t[done:]))
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return repl
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#
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# Try to replace a C reference (function() or struct/union/enum/typedef
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# type_name) with an appropriate cross reference.
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#
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def markup_c_ref(docname, app, match):
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class_str = {RE_function: 'c-func',
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# Sphinx 2 only
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RE_generic_type: 'c-type',
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# Sphinx 3+ only
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RE_struct: 'c-struct',
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RE_union: 'c-union',
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RE_enum: 'c-enum',
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RE_typedef: 'c-type',
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}
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reftype_str = {RE_function: 'function',
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# Sphinx 2 only
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RE_generic_type: 'type',
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# Sphinx 3+ only
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RE_struct: 'struct',
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RE_union: 'union',
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RE_enum: 'enum',
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RE_typedef: 'type',
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}
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cdom = app.env.domains['c']
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#
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# Go through the dance of getting an xref out of the C domain
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#
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target = match.group(2)
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target_text = nodes.Text(match.group(0))
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xref = None
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if not (match.re == RE_function and target in Skipfuncs):
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lit_text = nodes.literal(classes=['xref', 'c', class_str[match.re]])
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lit_text += target_text
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pxref = addnodes.pending_xref('', refdomain = 'c',
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reftype = reftype_str[match.re],
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reftarget = target, modname = None,
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classname = None)
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#
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# XXX The Latex builder will throw NoUri exceptions here,
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# work around that by ignoring them.
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#
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try:
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xref = cdom.resolve_xref(app.env, docname, app.builder,
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reftype_str[match.re], target, pxref,
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lit_text)
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except NoUri:
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xref = None
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#
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# Return the xref if we got it; otherwise just return the plain text.
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#
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if xref:
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return xref
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else:
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return target_text
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#
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# Try to replace a documentation reference of the form Documentation/... with a
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# cross reference to that page
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#
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def markup_doc_ref(docname, app, match):
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stddom = app.env.domains['std']
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#
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# Go through the dance of getting an xref out of the std domain
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#
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target = match.group(1)
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xref = None
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pxref = addnodes.pending_xref('', refdomain = 'std', reftype = 'doc',
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reftarget = target, modname = None,
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classname = None, refexplicit = False)
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#
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# XXX The Latex builder will throw NoUri exceptions here,
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# work around that by ignoring them.
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#
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try:
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xref = stddom.resolve_xref(app.env, docname, app.builder, 'doc',
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target, pxref, None)
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except NoUri:
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xref = None
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#
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# Return the xref if we got it; otherwise just return the plain text.
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#
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if xref:
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return xref
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else:
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return nodes.Text(match.group(0))
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def auto_markup(app, doctree, name):
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#
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# This loop could eventually be improved on. Someday maybe we
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# want a proper tree traversal with a lot of awareness of which
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# kinds of nodes to prune. But this works well for now.
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#
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# The nodes.literal test catches ``literal text``, its purpose is to
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# avoid adding cross-references to functions that have been explicitly
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# marked with cc:func:.
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#
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for para in doctree.traverse(nodes.paragraph):
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for node in para.traverse(nodes.Text):
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if not isinstance(node.parent, nodes.literal):
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node.parent.replace(node, markup_refs(name, app, node))
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def setup(app):
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app.connect('doctree-resolved', auto_markup)
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return {
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'parallel_read_safe': True,
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'parallel_write_safe': True,
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}
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