Merge remote-tracking branch 'asoc/topic/rcar' into asoc-next
[sfrench/cifs-2.6.git] / Documentation / sphinx / kerneldoc.py
1 # coding=utf-8
2 #
3 # Copyright © 2016 Intel Corporation
4 #
5 # Permission is hereby granted, free of charge, to any person obtaining a
6 # copy of this software and associated documentation files (the "Software"),
7 # to deal in the Software without restriction, including without limitation
8 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 # and/or sell copies of the Software, and to permit persons to whom the
10 # Software is furnished to do so, subject to the following conditions:
11 #
12 # The above copyright notice and this permission notice (including the next
13 # paragraph) shall be included in all copies or substantial portions of the
14 # Software.
15 #
16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 # IN THE SOFTWARE.
23 #
24 # Authors:
25 #    Jani Nikula <jani.nikula@intel.com>
26 #
27 # Please make sure this works on both python2 and python3.
28 #
29
30 import os
31 import subprocess
32 import sys
33 import re
34 import glob
35
36 from docutils import nodes, statemachine
37 from docutils.statemachine import ViewList
38 from docutils.parsers.rst import directives
39 from sphinx.util.compat import Directive
40 from sphinx.ext.autodoc import AutodocReporter
41
42 __version__  = '1.0'
43
44 class KernelDocDirective(Directive):
45     """Extract kernel-doc comments from the specified file"""
46     required_argument = 1
47     optional_arguments = 4
48     option_spec = {
49         'doc': directives.unchanged_required,
50         'functions': directives.unchanged_required,
51         'export': directives.unchanged,
52         'internal': directives.unchanged,
53     }
54     has_content = False
55
56     def run(self):
57         env = self.state.document.settings.env
58         cmd = [env.config.kerneldoc_bin, '-rst', '-enable-lineno']
59
60         filename = env.config.kerneldoc_srctree + '/' + self.arguments[0]
61         export_file_patterns = []
62
63         # Tell sphinx of the dependency
64         env.note_dependency(os.path.abspath(filename))
65
66         tab_width = self.options.get('tab-width', self.state.document.settings.tab_width)
67
68         # FIXME: make this nicer and more robust against errors
69         if 'export' in self.options:
70             cmd += ['-export']
71             export_file_patterns = str(self.options.get('export')).split()
72         elif 'internal' in self.options:
73             cmd += ['-internal']
74             export_file_patterns = str(self.options.get('internal')).split()
75         elif 'doc' in self.options:
76             cmd += ['-function', str(self.options.get('doc'))]
77         elif 'functions' in self.options:
78             for f in str(self.options.get('functions')).split():
79                 cmd += ['-function', f]
80
81         for pattern in export_file_patterns:
82             for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):
83                 env.note_dependency(os.path.abspath(f))
84                 cmd += ['-export-file', f]
85
86         cmd += [filename]
87
88         try:
89             env.app.verbose('calling kernel-doc \'%s\'' % (" ".join(cmd)))
90
91             p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
92             out, err = p.communicate()
93
94             # python2 needs conversion to unicode.
95             # python3 with universal_newlines=True returns strings.
96             if sys.version_info.major < 3:
97                 out, err = unicode(out, 'utf-8'), unicode(err, 'utf-8')
98
99             if p.returncode != 0:
100                 sys.stderr.write(err)
101
102                 env.app.warn('kernel-doc \'%s\' failed with return code %d' % (" ".join(cmd), p.returncode))
103                 return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
104             elif env.config.kerneldoc_verbosity > 0:
105                 sys.stderr.write(err)
106
107             lines = statemachine.string2lines(out, tab_width, convert_whitespace=True)
108             result = ViewList()
109
110             lineoffset = 0;
111             line_regex = re.compile("^#define LINENO ([0-9]+)$")
112             for line in lines:
113                 match = line_regex.search(line)
114                 if match:
115                     # sphinx counts lines from 0
116                     lineoffset = int(match.group(1)) - 1
117                     # we must eat our comments since the upset the markup
118                 else:
119                     result.append(line, filename, lineoffset)
120                     lineoffset += 1
121
122             node = nodes.section()
123             buf = self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter
124             self.state.memo.reporter = AutodocReporter(result, self.state.memo.reporter)
125             self.state.memo.title_styles, self.state.memo.section_level = [], 0
126             try:
127                 self.state.nested_parse(result, 0, node, match_titles=1)
128             finally:
129                 self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter = buf
130
131             return node.children
132
133         except Exception as e:  # pylint: disable=W0703
134             env.app.warn('kernel-doc \'%s\' processing failed with: %s' %
135                          (" ".join(cmd), str(e)))
136             return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
137
138 def setup(app):
139     app.add_config_value('kerneldoc_bin', None, 'env')
140     app.add_config_value('kerneldoc_srctree', None, 'env')
141     app.add_config_value('kerneldoc_verbosity', 1, 'env')
142
143     app.add_directive('kernel-doc', KernelDocDirective)
144
145     return dict(
146         version = __version__,
147         parallel_read_safe = True,
148         parallel_write_safe = True
149     )