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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 class KernelDocDirective(Directive):
43     """Extract kernel-doc comments from the specified file"""
44     required_argument = 1
45     optional_arguments = 4
46     option_spec = {
47         'doc': directives.unchanged_required,
48         'functions': directives.unchanged_required,
49         'export': directives.unchanged,
50         'internal': directives.unchanged,
51     }
52     has_content = False
53
54     def run(self):
55         env = self.state.document.settings.env
56         cmd = [env.config.kerneldoc_bin, '-rst', '-enable-lineno']
57
58         filename = env.config.kerneldoc_srctree + '/' + self.arguments[0]
59         export_file_patterns = []
60
61         # Tell sphinx of the dependency
62         env.note_dependency(os.path.abspath(filename))
63
64         tab_width = self.options.get('tab-width', self.state.document.settings.tab_width)
65
66         # FIXME: make this nicer and more robust against errors
67         if 'export' in self.options:
68             cmd += ['-export']
69             export_file_patterns = str(self.options.get('export')).split()
70         elif 'internal' in self.options:
71             cmd += ['-internal']
72             export_file_patterns = str(self.options.get('internal')).split()
73         elif 'doc' in self.options:
74             cmd += ['-function', str(self.options.get('doc'))]
75         elif 'functions' in self.options:
76             for f in str(self.options.get('functions')).split():
77                 cmd += ['-function', f]
78
79         for pattern in export_file_patterns:
80             for f in glob.glob(env.config.kerneldoc_srctree + '/' + pattern):
81                 env.note_dependency(os.path.abspath(f))
82                 cmd += ['-export-file', f]
83
84         cmd += [filename]
85
86         try:
87             env.app.verbose('calling kernel-doc \'%s\'' % (" ".join(cmd)))
88
89             p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
90             out, err = p.communicate()
91
92             # python2 needs conversion to unicode.
93             # python3 with universal_newlines=True returns strings.
94             if sys.version_info.major < 3:
95                 out, err = unicode(out, 'utf-8'), unicode(err, 'utf-8')
96
97             if p.returncode != 0:
98                 sys.stderr.write(err)
99
100                 env.app.warn('kernel-doc \'%s\' failed with return code %d' % (" ".join(cmd), p.returncode))
101                 return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
102             elif env.config.kerneldoc_verbosity > 0:
103                 sys.stderr.write(err)
104
105             lines = statemachine.string2lines(out, tab_width, convert_whitespace=True)
106             result = ViewList()
107
108             lineoffset = 0;
109             line_regex = re.compile("^#define LINENO ([0-9]+)$")
110             for line in lines:
111                 match = line_regex.search(line)
112                 if match:
113                     # sphinx counts lines from 0
114                     lineoffset = int(match.group(1)) - 1
115                     # we must eat our comments since the upset the markup
116                 else:
117                     result.append(line, filename, lineoffset)
118                     lineoffset += 1
119
120             node = nodes.section()
121             buf = self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter
122             self.state.memo.reporter = AutodocReporter(result, self.state.memo.reporter)
123             self.state.memo.title_styles, self.state.memo.section_level = [], 0
124             try:
125                 self.state.nested_parse(result, 0, node, match_titles=1)
126             finally:
127                 self.state.memo.title_styles, self.state.memo.section_level, self.state.memo.reporter = buf
128
129             return node.children
130
131         except Exception as e:  # pylint: disable=W0703
132             env.app.warn('kernel-doc \'%s\' processing failed with: %s' %
133                          (" ".join(cmd), str(e)))
134             return [nodes.error(None, nodes.paragraph(text = "kernel-doc missing"))]
135
136 def setup(app):
137     app.add_config_value('kerneldoc_bin', None, 'env')
138     app.add_config_value('kerneldoc_srctree', None, 'env')
139     app.add_config_value('kerneldoc_verbosity', 1, 'env')
140
141     app.add_directive('kernel-doc', KernelDocDirective)